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Chapter 3

GSM Asynchronous Mode Operation

Spectrum measurements

4460 GSM System Option and 4468 EDGE System Option

Version 12.20

147

Working with the averaging tool

– Enter the averaging tool by pushing the

|Start Avg.|

softkey.

– The 4400 will now start the averaging process, using the number of

measurements set on the

Avg

entry field.

– As long as the number of measurements taken is less than the number

entered on the

Avg

entry field, the number of the current measurement will

be displayed in red on the

Count

display field.

– As soon as the number of measurements taken is equal or larger than the

number of measurements specified for the averaging process, the number on
the

Count

display field will turn blue.

Important to note

– The entry range for the

Avg

entry field is from 1 to 200.

– The

Avg

entry field is not accessible unless the averaging process has been

started.

– As soon as you change the current setting on the

Avg

entry field, the aver-

aging process will be reset. This means that all previous measurements will
be discharged and the series of measurements will be started anew.

– A reset of the averaging process can also be achieved by pushing the

|Reset|

softkey.

– When the number of measurements taken (display field

Count

) exceeds the

number of measurements specified for the averaging process (

Avg

entry

field), always the last

Avg

measurements will be averaged and displayed in

the live display.

– In case the live display is frozen and unfrozen (using the appropriate softkey)

during an averaging process, the averaging process will not be interrupted
but will continue in the background.

– Even when the live display has been frozen, a reset of the averaging is

possible, pushing the

|Reset|

softkey.

Viewing the maximum deviation

The spectrum live display shows the current or the averaged spectrum of the
signal. In some cases it can be useful to check the maximum deviation from the
current or the average. Push

|Min-Max ON|

for this purpose; the 4400 then

displays two additional curves in red, visualizing the minimum and the maximum
for each frequency point as measured since the start of the test.

Push

|Reset|

to erase previous minima and maxima and to start the measure-

ments all over.

Push

|Min-Max OFF|

to resume measurements without the deviation display.

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Summary of Contents for 4400 Mobile Phone Tester Series

Page 1: ...4400 Mobile Phone Tester Series 4460 GSM System Option 4468 EDGE System Option User s Guide boosting wireless efficiency User s guide Version 12 20 ...

Page 2: ......

Page 3: ...s GmbH in Germany and other countries Specifications terms and conditions are subject to change without notice All trademarks and registered trademarks are the property of their respective companies Ordering information This guide is issued as part of the 4460 GSM System Option and 4468 EDGE System Option The ordering number for a published guide is M 290 011 The ordering number for the product de...

Page 4: ...ii 4460 GSM System Option and 4468 EDGE System Option Version 12 20 ...

Page 5: ...xvii Technical assistance xvii Conventions xvii Safety Notes xix Before startup xx During test xx During maintenance and repair xx Shutdown when defective xxi Chapter 1 Overview 1 About the 4400 2 What s new 3 New in version 12 20 3 New in version 12 10 3 New in version 12 00 3 Compatibility 3 Connecting test leads 4 Crash course 4 Cabling 4 Cable connection 5 Air connection 5 The front and rear p...

Page 6: ...sories and options 29 Upgrades 30 Options 30 Expanding the 4400 s measurement capabilities 34 Little aids for speeding up tests 36 Rack installation cases 38 Chapter 2 GSM Call Mode Operation 41 Overview 42 GSM tests 42 Basic test menu 43 Call graph 44 Basic test results display 48 Phase Frequency test menu 49 Phase Frequency live display 51 Phase Frequency results display 51 Burst test menu 52 Bu...

Page 7: ...Micro Cell area 97 The parameters of the Call Setup area 99 SMS Message Class 100 Resetting all entry fields of the 4400 to the default values 100 Power time templates PTT 100 PTTs for normal bursts and random access bursts 101 Measurement limits 104 Power measurement limits 107 Corner points 109 The meaning of the entry fields 110 Softkeys of the corner points menu 110 GSM basics 111 Anatomy of a...

Page 8: ...e alignment screen 140 Writing your own alignment script 141 Spectrum measurements 143 Access to the spectrum measurement menus 144 Modulation spectrum measurements 144 On first sight 145 The Spectrum Live Display 145 ACPM modulation spectrum measurements 148 On first sight 149 A glance into the GSM specifications 149 Understanding the measurement principle 150 The spectrum live display 150 ACPM t...

Page 9: ...wnlink assignments 176 Assignment of time slots for uplink and downlink 177 Uplink Power Control 177 Test prerequisites 177 GPRS test mode 178 EDGE modulation and coding schemes 178 Chapter 5 EDGE Asynchronous Mode Operation 179 Overview 180 RF generator 181 Parameters of the system area 181 Parameters of the signal type area 183 Parameters of the modulation area 184 EVM frequency analyzer 186 Usi...

Page 10: ... of this menu 214 Initiating a software update from a remote PC 216 Coupling loss 216 How to activate a previously stored coupling loss definition 217 How to store a coupling loss file on the 4400 217 How to edit a coupling loss definition already stored on the 4400 218 The user defined attenuation menu 219 Utilities 222 Access to the Utilities menus 222 I O trace for GPIB communications 222 The s...

Page 11: ... environment 252 File menu 253 File name directory selection area 253 Browser area 254 RAPID basic file area 255 Softkeys of the file menu 255 Edit menu 257 Edit area 258 Status area 258 Softkeys of the Edit menu 259 Search Replace menu 260 Typing tabs 260 Run menu 261 Output area 262 Softkeys of the Run menu 263 Debug menu 263 Source area 264 Variable area 264 Softkeys of the Debug menu 266 RAPID...

Page 12: ...283 FUNCTION EXIT FUNCTION END FUNCTION 284 GLOBAL 285 SUB EXIT SUB END SUB CALL 285 VARIABLE 286 Control commands 287 DO LOOP WHILE UNTIL 287 FOR NEXT 288 IF THEN ELSE ELSEIF END IF 289 SELECT CASE CASE ELSE END SELECT 290 Branch commands 291 ERROR 291 GOSUB RETURN 291 GOTO 292 ON ERROR RESUME 292 Commands for input output handling 294 CLOSE 294 INPUT 294 OPEN on files 295 OPEN on communication p...

Page 13: ...NKEY 311 INKEYWAIT 312 KILL 312 MKDIR 312 NAME 313 RMDIR 313 SHELL 313 TIME 314 Functions for error handling 314 ERR 314 ERL 315 ERF 315 Mathematical functions 315 ABS 316 LOG LGT 316 RND RANDOMIZE 316 SIN COS TAN ATAN 317 SQRT 317 SGN 317 Tables 318 RAPID commands and functions 318 Syntax errors 321 Runtime errors 325 Chapter 8 SCPI 329 Overview 330 What SCPI is 330 Structure 331 Syntax and notat...

Page 14: ... PROGram subsystem overview 351 The FORMat subsystem overview 351 The BS and MS parameter subsystems 352 The CONFigure subsystem 352 The CALL subsystem 353 The Measurement subsystems 353 The MEASure subsystem 353 MEASure CONTinuous 354 MEASure ARRay 356 MEAS CONT BLOCkdata 358 MEAS BLOC MSP CURRent 359 MEASure GROup 360 The FETCh subsystem 361 FETCh LAST 361 FETCh BLOCkdata 362 FETCh measProp 362 ...

Page 15: ...mmands affecting the service register 379 SYSTem subsystem 381 STATus subsystem 389 FORMat subsystem 409 CONFigure subsystem 411 CALL subsystem 449 MEASure subsystem 461 FETCh Subsystem 578 CALCulate Subsystem 610 RFGenerator subsystem 736 RFANalyser subsystem 787 RFSPectrum subsystem 790 AFGenerator subsystem 794 AFANalyser subsystem 799 MS Power Supply subsystem 803 Appendix B Warranty and Repai...

Page 16: ...Table of Contents xiv 4460 GSM System Option and 4468 EDGE System Option Version 12 20 ...

Page 17: ...ersion 12 20 xv About This Guide Index of the 4460 GSM System Option and 4468 EDGE System Option on page xvi Purpose and scope on page xvi Assumptions on page xvi Related information on page xvii Technical assistance on page xvii Conventions on page xvii ...

Page 18: ...ed fixing Purpose and scope The purpose of this guide is to help you successfully use the 4460 GSM System Option and 4468 EDGE System Option features and capabilities This guide includes task based instructions that describe how to install configure use and troubleshoot the 4460 GSM System Option and 4468 EDGE System Option Addi tionally this guide provides a description of Willtek s warranty serv...

Page 19: ... Fax number e mail address Europe Middle East Asia Africa 49 0 89 996 41 311 49 0 89 996 41 440 Americas 1 973 386 9696 1 973 386 9191 China 86 21 5836 6669 86 21 5835 8039 86 21 5835 5238 Table 2 Typographical conventions Description Example User interface actions appear in this typeface Push the BS Call softkey Buttons or switches that you press on a unit appear in this TYPEFACE Press the ON swi...

Page 20: ... sign indicates simultaneous keystrokes Press Ctrl s A comma indicates consecutive key strokes Press Alt f s A slanted bracket indicates choos ing a submenu from menu On the menu bar click Start Program Files Table 2 Typographical conventions Continued Description Example This symbol represents a general hazard This symbol represents a risk of electrical shock NOTE This symbol represents a note in...

Page 21: ...afety Notes This chapter provides the safety notes for the 4400 Series Mobile Phone Tester Topics discussed in this chapter include the following Before startup on page xx During test on page xx During maintenance and repair on page xx Shutdown when defective on page xxi ...

Page 22: ...onductor the cabinet of the 4400 could become live as the result of a defect This can make the test set a potential risk Apply proper grounding Always plug in the power socket of the 4400 before connecting a test circuit in order to use the protective effect of the 4400 grounding Live parts with and without supply voltage connected Before any adjustment maintenance repair or replacement of parts t...

Page 23: ...mage if the test set will no longer work after a longish period of storage under the wrong conditions see data sheet following transport under adverse conditions If you suspect that it is unsafe to continue operating the 4400 shut it down immediately and pull out all power connectors Secure the test set in such way that nobody else can start it up again in order to protect any third party Get in t...

Page 24: ...Safety Notes Shutdown when defective xxii 4460 GSM System Option and 4468 EDGE System Option Version 12 20 ...

Page 25: ...he 4400 Series Mobile Phone Tester Topics discussed in this chapter include the following About the 4400 on page 2 What s new on page 3 Compatibility on page 3 Connecting test leads on page 4 The front and rear panels on page 6 Menus and levels on page 21 Menu fields on page 23 Help on Help on page 28 Accessories and options on page 29 ...

Page 26: ...RS EGPRS 4468 EDGE System Option WCDMA UMTS 4466 WCDMA Non Call Mode Option 4467 WCDMA Call Mode Option TD SCDMA 4450 TD SCDMA Non Call Mode Option 4451 TD SCDMA Call Mode Option The built in programming tool RAPID allows for easy test automation Default standard test routines are already stored on the machine and more enhanced sequences are available as options RAPID even allows for data input fr...

Page 27: ... PCDE Support of all Reference Measurement Channels 12 2 kbps 64 kbps 144 kbps and 384 kbps TD SCMDA System Option non call mode Code Domain Spectrum and RX TX switch GSM System Option Non residual BER measurement with CRC check Compatibility From serial number 0911001 onwards the Willtek 4400 is equipped with an enhanced PC Controller that not only offers standard USB and Ethernet inter faces but...

Page 28: ...available from the mobile s manufacturer or from Willtek Please contact your local Willtek representative However should the adapter cable for your mobile not be at hand the air connection offers a simple to use alternative for quick tests With the optional RF Shield precise measurements can be achieved without interference Don t exceed the maximum RF power level Before connecting any RF equipment...

Page 29: ...ilities to use the air connection The simplest possibility is to put an optional antenna on the 4400 s RF in out socket However the drawbacks of this solution are the unknown coupling loss and the potential interference The coupling loss depends on factors such as the orientation of the mobile towards the 4400 the distance and the frequency The possible interference depends on the type of RF radia...

Page 30: ...nection The achievable measurement quality can be as good as when using a cable if the attenuation is compensated with the help of the coupling loss table The 4921 RF Shield is available with either a TNC type or N type connector The front and rear panels Front panel Get to know the ten sections of the front panel Rear panel Here you will find all about the rear panel of your 4400 Connectors The c...

Page 31: ...S Power Supply Option Section 2 Display The display is the graphical user interface of the 4400 It will show you menus with entry fields and display fields The display also labels the software driven softkeys see section 3 and marker tabs see section 4 Section 3 Softkeys Softkeys call specific functions that vary with the menu displayed For instance when you switch on the 4400 the softkeys will al...

Page 32: ...panel of the 4400 can be found in section Connectors Section 10 Floppy drive for serial numbers below 0911001 As with all floppy drives the floppy disk will only fit in one direction Please insert the floppy disk carefully Do not use any force as this could damage both the floppy disk and the floppy drive Section 10 USB interfaces for serial numbers 0911001 and above The 4400 provides two USB inte...

Page 33: ...ill find all the standard PC interfaces on the back of the 4400 If you need to know anything regarding the PC interfaces please refer to Connectors Section 3 The power supply In this section the power switch and the power connector are located Connectors Connectors on the front panel There are four connectors on the front panel one on the left hand side close to the On switch and three on the righ...

Page 34: ...formance is achieved on a 600 Ω load The maximum output voltages are 4 V rms for sinusoidal signals or 11 V peak to peak for all other signals RF in out RF signal input for transmitter measurements and output for receiver measurements It depends on the current system test whether the 4400 measures an input signal generates an output signal or both HAZARD The absolute maximum input voltage is 40 V ...

Page 35: ...SYNC BNC socket Input for external reference signal If a high precision reference signal of 5 MHz 10 MHz or 13 MHz is connected here the internal 10 MHz reference signal of the 4400 will not be used Input level approx 0 dBm Frequency tuning range approx 1 ppm 10E 6 equals 10 Hz at 10 MHz Input resistance approx 50 Ω 10 MHz OUT BNC socket Output of the 4400 s internal 10 MHz reference signal With t...

Page 36: ...ector is currently configured as Sync out The 4400 outputs its internally generated frame synchronization signal This signal is TTL low for downlink time slots 0 to 2 and TTL high for time slots 3 to 7 TRIG IN 1 BNC socket expecting a CMOS TTL signal A trigger signal applied on this connector triggers all GSM related RF measure ments The 4400 allows you to select between triggering on the rising o...

Page 37: ...le AC frequency range stretches from 30 Hz to 20 kHz Connectors on the PC unit below serial number 0911001 VGA Standard connector for a VGA monitor KEYBOARD Standard PS 2 connector for a PC keyboard HAZARD AUX out is a balanced output This means that the voltages provided are floating Never short circuit these two pins and never connect them to ground as this could result in an immediate destructi...

Page 38: ...001 and above VGA Standard connector for a VGA monitor COM 1 Standard 9 pin D sub connector for serial interface 1 USB 1 2 Standard USB connectors for USB devices like USB sticks printer etc These two connectors are internally connected and thus parallel to the two USB connectors on the front panel Please note that only USB sticks labelled with Willtek will work on the 4400 USB 3 Standard USB inpu...

Page 39: ...ector 3 pins Please make sure that the power cable is properly grounded The keys on the front panel There are six different groups of keys In the photo of the front panel above they are marked with numbers 3 through 8 The softkeys 3 The marker tabs 4 The function keys 5 The numeric keys 6 The cursor keys 7 NOTE A mouse is highly recommended for RAPID programming see page 249 HAZARD Before connecti...

Page 40: ...nd their locations The softkeys Softkeys call specific functions that vary with the menu displayed The specific function is written in the last two lines of the display just above the physical key This is what we call the label of the softkey Example In the Welcome menu of the 4400 the softkeys will allow you to select between measurements in call mode and those in non call mode Notes on softkeys ...

Page 41: ...d any time Some or all marker tabs may turn to grey to indicate that they are blocked e g when there is a test in progress In this case the previously started test has to be either completed or aborted before a new selection with the marker tabs is possible The function keys With the help of the function keys you have instant access to important or useful functions of the 4400 Some of the function...

Page 42: ...SCAPE A push on this key takes you one menu level up Should this cause a change of a parameter you will be prompted to either confirm or dis card your change in menu levels BACK Deletes the character left to the cursor on an entry field ENTER Confirms a value entered on an entry field HELP Calls the Online help on screen Once that you are done with the help screens press Esc to return to the previ...

Page 43: ...ous or next one The UP or DOWN cursor keys allow you to increase or decrease the parameter value on a numeric entry field or to step through the predefined settings of a selection field The selection key This wheel is used to quickly change values on entry fields When the cursor is positioned on an entry field the entry field is then inverted a turn on the selection key directly changes the value ...

Page 44: ... an external PC keyboard Softkeys From left to right the seven softkeys are mapped to the key combinations SHIFT F1 to SHIFT F7 Marker tabs From up to down the seven marker tabs are mapped to the key combinations CTRL F1 to CTRL F7 Function keys Numeric keys Mapped to the numeric keys on the standard PC keyboard 4400 front panel Keyboard HELP F1 TOOL F2 PRINT F3 PGUP PAGE UP PGDN PAGE DOWN ESC ESC...

Page 45: ...u Any time you switch on your 4400 it first displays the start or Welcome menu The Welcome menu is the highest menu level of the hierarchically structured user interface With the help of the marker tabs on the right hand side of the display you select between the different system menus e g GSM or CDMA The softkeys just below the display give you instant access to the various test menus e g Calls M...

Page 46: ...u where you can select between the various tests this is the so called test level Now you push the third marker tab from the top Burst and the 4400 will display the Burst test menu The Zoom softkey of the Burst test menu leads you to the Zoom menu The areas of a test menu Each test menu is divided into different color coded areas each providing different functions These functions are described in ...

Page 47: ...channel number and there are entry fields that accept alphanumeric data like e g an SMS text There are also two special forms of entry fields the so called selection fields where you may select one of several predefined possibilities e g what bit class es you want to use for a bit error rate measurement and the check boxes Check boxes are like an on off switch You can t enter values you can just s...

Page 48: ...elected entry field is inverted to make it easily visible on screen Entering values on numeric entry fields There are two ways how to work with numeric entry fields either you enter the value using the 4400 s numeric keys or you use the selection key The achievable results are basically the same However there is no entry discard function when you use the selection key Enter the required value usin...

Page 49: ...lphanumeric entry fields as e g SMS to mobile phone texts are best entered using an external keyboard Of course it is also possible to enter alphanumeric values directly on the 4400 As soon as the entry field is opened the marker tabs change to groups of letters and symbols The lowest marker tab incorporates the shift function and allows you to toggle between lowercase and uppercase letters NOTE W...

Page 50: ...ing the UP or DOWN cursor keys To confirm the changes push the ENTER function key or just leave the selection field using the LEFT or RIGHT cursor keys Instead of selecting a new value with the cursor keys you may also turn the selection key Switching check boxes Any push on the ENTER function key toggles the currently selected check box This means that an unchecked check box will be switched to o...

Page 51: ...aller than the lower limit the lower limit violation indicator will turn to red The same will happen with the upper limit violation indicator when a measurement value exceeds the acceptable range Display Markers For easy reading of its graphical live displays the 4400 offers two display markers These are vertical lines that allow to take measurements at specific positions e g in a spectrum live di...

Page 52: ...ribes how to work with the Online help Notation rules While working with the Online help you will have to push softkeys marker tabs or other keys To keep things as clear as possible the online manual either uses the graphical image of the item as you see it on screen or it uses the following notation rules Navigating help With the help of both the marker tabs and the softkeys it is easy to navigat...

Page 53: ...of accessories that help you perform specific tests or measurements to easily connect mobiles to the 4400 and much more Please find below a short overview of the available accessories and options and the applications they have been designed for Should you miss something in the list below please check with your local Willtek representative Due to ongoing product development and improvement the turn...

Page 54: ...station with many optional parameters Signaling supported location updating MS BS originated call setup MS BS originated call clearing channel change handover within frequency band and inter frequency band SMS MS BS originated Supported measurements MS Power Phase Frequency error R BER class I II FER Fast BER GSM Service Test Software The GSM Service Test Software enables the 4400 to rapidly run a...

Page 55: ...arameters Signaling supported location updating EDGE attach detach EDGE test mode A channel change handover within frequency band and inter frequency band Supported measurements EDGE Power Power Time Template RMS EVM Peak EVM 95 EVM IQ Origin Offset and Frequency error measurements Note The EDGE Option requires the GSM Option CDMA2000 System Option The CDMA2000 System Option supports both asynchro...

Page 56: ...n quality the transmit power quality and the radio frequency spectrum A built in signal generator can be used to stimulate the wireless device and to test the received signal strength indicator of the phone The 1xEV DO Call Mode Option features the call processing functions necessary to set up a connection This mode resembles a real life situation and allows both transmitter measurements and recei...

Page 57: ...ission Mask SEM transmit modulation EVM and PCDE reference sensitivity level and maximum input level The WCDMA Tracer Option finally is an optional software tool which records the layer 3 RRC layer down to layer 1 physical layer protocol messages between the 4400 and the device under test DUT You can specify which messages should be displayed view them on your PC and record a trace in a debug file...

Page 58: ...for audio testing are available for the GSM the GPRS and EDGE System Options The 4471 Basic Codec Option and the 4472 Codec Extension Option allow you to convert the digital data exchanged between the mobile and the 4400 into audible sound As you know GSM currently uses three different codecs Full Rate is what GSM started with and what is still the most common codec type To convert Full Rate into ...

Page 59: ...spec tively AM Signal Generator for GSM GPRS and EDGE only The Amplitude Modulation AM Signal Generator is required by some manufac turers for testing and for alignment of mobile phones The functionality is explained in the related Non Call Mode sections Output power level 10 dBm Modulation frequency range 1 to 50 kHz Modulation depth 50 to 90 Baseband Processing Hardware This option requires the ...

Page 60: ... the mobile under test The Test SIM can also be used with other mobile phone testers from Willtek Antennas for use on the 4400 When there is a need to perform quick basic tests on a mobile an antenna might be good to have However there are a couple of drawbacks using an antenna for real measurements Section Cabling provides you with all the technical back ground information If you need to perform ...

Page 61: ...able the achievable measurement quality is as good as using a cable The RF Shield is available with either a TNC type or N type connector NOTE The RF shield package contains both the 4921 RF Shield and the 4916 Antenna Coupler Antennas on the 4400 Antenna Coupler RF Shield Accessory Willtek order number Antenna for GSM 900 with TNC connector M 860 261 Antenna for GSM 1800 GSM 1900 with TNC connect...

Page 62: ... battery e g when it transmits a burst Even a current vs time measurement with graphical display can be obtained Last but not least the average power requirement is calculated from the measurement results Rack installation cases Hard case The Carrying Case for the 4400 is a hard case that is an ideal protection when ever the 4400 needs to be shipped or transported It also is a safe place to store ...

Page 63: ...ck Mount Set Your 4400 can easily be mounted in a 19 inch rack The optional Rack Mount Set comprises all the required material including a 19 inch front panel 5 HU with all necessary cutouts for cables etc Option Willtek order number Carrying Case M 300 808 Option Willtek order number 4490 Rack Mount Set M 378 260 ...

Page 64: ...Chapter 1 Overview Accessories and options 40 4460 GSM System Option and 4468 EDGE System Option Version 12 20 ...

Page 65: ...n Version 12 20 41 Chapter 2 GSM Call Mode Operation This chapter describes the functionality of the instrument Topics discussed in this chapter are as follows Overview on page 42 GSM tests on page 42 System parameters on page 96 GSM basics on page 111 ...

Page 66: ...ideline on how to connect a mobile and perform tests Need to know more about the user interface of the 4400 Just navigate to Menus and levels on page 21 and you will find all you need to know This chapter is divided into three subsections GSM tests Here you will find everything regarding the available tests e g Phase Frequency MS Info and how to read the results System parameters This subsection w...

Page 67: ...a push on the related softkey below the screen A more detailed description of the softkeys can be found in section Softkeys at test level on page 90 The burst test menu provides zooming functions that help you to check the mobile s behaviour in detail For more information on those zoom levels please refer to section Burst test menu on page 52 Basic test menu Of course the main application of this ...

Page 68: ...nd the currently executable measure ments As long as no call or paging has been initiated the call graph will look like the sample above In this case the 4400 is in idle mode and waiting to either receive a call from the mobile or for you pushing either the BS Call or the Paging softkey How to read the call graph NOTE Before any RX test results can be displayed a call has to be set up and the clos...

Page 69: ...all required signaling has been exchanged between the 4400 and the mobile the status will change to Call established The black lines without arrows indicate the possible paths from one state to another Example There are two paths from Idle to Call established Either the direct one by a MS originated call or through the MS alert state during a BS originated call setup All rectangular boxes with whi...

Page 70: ...ph will change to Call established As soon as the call has been put through you are working on call level Now all GSM TX measurements will be performed automatically see section Basic test results display on page 48 for details BER loop For the GSM receiver test the mobile has to enter a specific test mode called the closed loop To enter that mode of the mobile simply push the Start BER softkey af...

Page 71: ...ng softkey and the 4400 will start broadcasting paging requests The 4400 will not answer to the mobile s access bursts but will keep on paging it This allows you to check whether the mobile is able to receive the 4400 s paging requests on the currently set RF Out level of the test set and to repeatedly measure the mobile s access burst The call graph will indicate the paging state as follows NOTE ...

Page 72: ...The IMEI consists of 15 digits the last one is not transferred over the radio interface but calculated from the other 14 dig its The additional two digits shown in brackets indicate the software version in the mobile phone which has been trans ferred to the 4400 together with the IMEI MS Class This display field shows the mobile s power class both as GSM power class and as the maximum RF output le...

Page 73: ...e Measurement limits menu Phase peak The results of the statistic evaluation of the peak phase error measurement are displayed on this bar Note The limits for this test are set on the Measurement limits menu Phase rms On this bar display the 4400 displays the results of the statis tic evaluation of the mean phase error rms Note The limits for this test are set on the Measurement limits menu BER II...

Page 74: ...thin a burst in degrees NOTE The current MS power level the mobile has been commanded to use can be seen and altered in the parameters section of this menu NOTE A difference of about 1 dB between the commanded power level and the cur rently measured results is tollerable especially at the top level of the power level range However a larger difference leading to a Fail indication could also be due ...

Page 75: ...ts is displayed as current minimum average and maximum values The bar displays give a graphical repre sentation of the test results in relation to the measurement limits NOTE To get an exact reading of the values measured please use the display mark ers NOTE With the help of the Resolution setting the vertical axis the phase error can be rescaled The possible settings are 2 5 10 20 or 50 degrees D...

Page 76: ...ea On first sight While the mobile has to ramp up or down its RF power level within some 30 microseconds the RF power level should be constant during the burst The PTT power time template defines the power level the mobile should transmit with for any time position during and some 50 microseconds before and after the burst The Timing Advance commands the mobile to send its burst a little earlier T...

Page 77: ...eas of the burst the ramping phase and the constant power phase Burst results display The result display shows the numeric results of the burst measurements For any GSM network it is very important that the mobile keeps its RF power level within the limits of the power time template in order to maintain a good transmission of the data during a burst and not to disturb the transmission of other mob...

Page 78: ... bar display gives the position of the measured values with respect to the measurement limits Note The current MS power level that the mobile has been commanded to use can be seen and altered in the parameters section of this menu Burst Len This display field shows the duration of the burst in microseconds Timing Advance There are both an entry field and a display field On the entry field you set ...

Page 79: ...values for specific positions please use the display markers Test Here the 4400 tells you whether the current burst is ok or whether it has violated any power time template limits Note This is important information as the violation could have occurred in the constant power phase of the burst However that part of the burst is not visible in this menu Test parameters On this menu only the TCH channe...

Page 80: ...mits as set on the Power time templates PTT menu are shown in gray on this menu Marker To read the exact values for specific positions please use the display markers Test Here the 4400 tells you whether the current burst is ok or whether it has violated any power time template limits Note This is important information as the violation could have occurred in the ramping phase of the burst However t...

Page 81: ... parameters informing you about the mobile s own quality interpretation of the bits received will be displayed The mobile also checks the signal quality from neighbouring cells and reports those measurements back to the base station the 4400 BER live display The three entry fields of the upper left hand section allow to set specific test parameters Depending on the settings here the live display o...

Page 82: ...ocedure is used because any loss of class Ia bits will have a great effect on speech quality Class II bits are not protected at all and there is no channel encoding on either side They are just sent as plain vanilla data from the 4400 to the mobile and back This is the reason why people concentrate on the BER of class II bits when a quick and simple test of the mobile s receiver is needed The test...

Page 83: ... while there are only 78 class II bits in a standard voice block In Fast BER there is no decoding and encoding on the mobile side The PRBS received from the 4400 will just be fed back to the mobile s transmitter PRBS PseudoRandom Bit Sequence Therefore the Fast BER is a method to solely test the mobile s receiver performance rather than testing the mobile s receiver decoder and encoder stages Fast...

Page 84: ... Usu ally the mobile s channel decoder uses the checksum transmitted for the class 1a bits to do so Consequently a bad frame has at least one error on the class Ia bits All frames accepted by the mobile can be regarded as having been received error free Therefore the RBER is calculated for bit classes Ib and II only In theory all speech frames could be bad This would then lead to an infinite test ...

Page 85: ...ts BER Samples Here you enter the number of bits that shall be used for the current BER measurement This number is interpreted by the 4400 as the total amount of all class Ia Ib and II bits The per missible entry range is from 2 000 to 1 000 000 A good com promise between test time and quality of results is 10 000 Notes Both a full rate and a half rate TCH voice block consist of 260 data bits 50 o...

Page 86: ...ere is the number of results that have been used to calculate the statistical evaluation Bits These three display fields show the number of bits of the three bit classes Ia Ib or II that have been used to do a single BER test run Curr BER of the current test run Please see section Statistical test evaluation for details Min Smallest BER of all test runs Please see section Statisti cal test evaluat...

Page 87: ...ull rate TCH a voice block is spread out on eight TDMA frames Consequently the mobile has to gather those eight TDMA frames in order to be able to decode the voice block sent initially After the voice block has been decoded the mobile must encode it again and send it back to the 4400 Therefore the minimum round trip delay will be 8 TDMA frames on a full rate TCH If there are SACCH frames or idle f...

Page 88: ...Avg Average Fast BER of all test runs Please see section Sta tistical test evaluation for details Max Largest Fast BER of all test runs Please see section Statis tical test evaluation for details Round trip delay The round trip delay is the number of TDMA frames between the reception of a particular burst at the mobile and the transmission of the same burst on the uplink As there is no coding and ...

Page 89: ...ns Please see section Statistical test evaluation for details Round trip delay The round trip delay is the number of TDMA frames between the reception of the first burst of a particular voice block at the mobile and the transmission of the first burst of the same voice block on the uplink According to GSM ETSI recommendations the round trip delay should be less than 26 TDMA frames The round trip d...

Page 90: ... is coded please check with section MS Report display Full The above measurements are performed on the assigned TCH The measurement values given in line Full are always carried out over a complete SACCH reporting period Note Should a base station perform e g DTX those values are probably averaged Sub When the base station e g performs DTX the measure ment will be carried out only using the number ...

Page 91: ...receive and the RF power level they come in at the mobile Based on the measurement report a base station can decide to which neigh bouring cell it should hand over the mobile if the radio connection gets worse A SACCH reporting period is approx 480 ms long The current MS power level the mobile has been commanded to use can be seen and altered in the parameters section of this menu The meaning of t...

Page 92: ... there are three digits being used for the MNC in North America The remaining ten digits nine in North America are the registration number of the subscriber within the network Fore more details on MCC and MNC please refer to section Coding of MCC and MNC on page 117 IMEI SV International Mobile Equipment Identity i e the elec tronic serial number of the mobile Encoded in the IMEI are manufacturer ...

Page 93: ...ced full rate chan nels while a No tells you that the mobile can t Note This information is only available after a call has been set up while all other parameters shown on this menu are provided by the mobile during a location update SMS Indicates the mobile s ability to handle Short Message Service functions A Yes indicates that the mobile sup ports SMS Ext Freq Here the 4400 informs you whether ...

Page 94: ... the mobile can receive and the RF power level they come in at the mobile Notes Based on the measurement report the base station can decide to which neighbouring cell it should hand over the mobile if the radio connection gets worse An SACCH reporting period is approx 480 ms long SMS to mobile phone Enter any SMS message on this entry field To send it to the mobile just push the Send SMS softkey N...

Page 95: ...ser is talking During that period the person on the other end of the line is mainly listening As long as there is no DTX the values given in lines Full and Sub are identical In case of DTX the values given in lines Full and Sub might differ During DTX a base station only transmits SID frames Thus the base station reduces unnecessary interference with other base stations NCell In standard GSM the b...

Page 96: ...urements To return to the other tests i e non spectrum measurements press the ESCAPE key Modulation spectrum measurements The measurement of the spectrum due to modulation and wideband noise is a useful tool for adjusting the mobile s I Q modulator and detecting side waves of the carrier or spurious emissions The menu of the modulation spectrum analyzer provides a graphical display of the RF input...

Page 97: ...xis in MHz The selection field Max Level allows to set the maximum power level to opti mize the vertical resolution Display field dBm shows the maximum RF power level measured on the center frequency Selection fields Res BW and Span allow to set the resolution and frequency span for the horizontal axis of the live display Max Level This selection field allows to set the RF power level that is repr...

Page 98: ... MS scroll field to change the power level at which the mobile phone is transmitting Reading the overall power level The overall power is displayed in the lower left corner below the marker readings Averaging the Modulation Spectrum The 4400 provides a useful tool to smoothen the RF modulation spectrum curve the averaging function This means that a user definable number of the continuous measureme...

Page 99: ... on the Avg entry field the aver aging process will be reset This means that all previous measurements will be discharged and the series of measurements will be started anew A reset of the averaging process can also be achieved by pushing the Reset softkey When the number of measurements taken display field Count exceeds the number of measurements specified for the averaging process Avg entry fiel...

Page 100: ...below for details The purpose of this measurement is to verify that the mobile s modulator does not create sideband emissions that would then disturb transmission on adjacent traffic channels This measurement will test the following internal stages of the mobile under test channel synthesizer Gaussian baseband filter and the I Q modulator The following defects of the mobile might be detected with ...

Page 101: ...ls of the spectrum analyzer A glance into the GSM specifications The ACPM measurements refer to section 4 2 Output RF Spectrum of specifica tion GSM 11 10 Mobile conformance specification Radio transmission and reception Section 4 2 1 specifies various measurements for the spectrum due to modula tion and wide band noise The most important measurements are through a 30 kHz filter resolution band wi...

Page 102: ...ntinuously as long as it has not been frozen The vertical axis of the spectrum live display is in dBc the horizontal axis in MHz The resolution of the display is fixed and follows the appropriate GSM specifica tion The reference level shown in the lower left corner of the display is the power level measured at the center frequency in a 30 kHz bandwidth All levels displayed in the live display are ...

Page 103: ...ous measurements will be taken and the single measurement results will be averaged The result will be a smoother result curve eliminating single peaks that might be due to spikes or other measurement errors Working with the averaging tool Enter the averaging tool by pushing the Start Avg softkey The 4400 will now start the averaging process using the number of measurements set on the Avg entry fie...

Page 104: ...ing transients cause interference in the adjacent channels In order to minimize that interference the mobile has to be compliant with the appropriate GSM specifications To call the menu simply push the ACPM trans marker tab On first sight The mobile s transient spectrum is displayed graphically in the menu s live display for the discrete frequencies specified by the appropriate GSM specifica tion ...

Page 105: ...re then displayed as vertical bars in dBm If the Peak Hold function is activated the results settle after about 10 measurements The spectrum live display The live display is updated continuously as long as it has not been frozen The vertical axis of the spectrum live display is in dBm the horizontal axis in MHz The selection field Max Level allows to set the maximum power level to opti mize the ve...

Page 106: ...single measurement runs already taken into account is shown on the Count display field Working with the peak hold function Start the peak hold function by pushing the Start Peak softkey The 4400 will now start the peak hold process This means that the peak measurement result value for every single of the 27 measurement frequen cies will be displayed on screen The number of single measurement runs ...

Page 107: ...ment curve is shown in blue while the minimum and maximum curves are displayed in magenta see picture below Sampling minima and maxima can be restarted by pushing the Reset key The minima and maxima display can be switched off by pushing the softkey again This softkey is displayed when the minima maxima display function is switched on Modulation Spectrum only It can be used to switch the minima an...

Page 108: ... ACPM transient spectrum measurements When the peak hold process is running the softkey will change to Stop Peak A push on this softkey stops the peak hold process of the ACPM transient spectrum measurements and takes you back to the continuous measurement The softkey will change to Start Peak To freeze the current display for further or detailed analysis or for printing push this softkey The soft...

Page 109: ...z The corresponding result fields dBm show the measurement values obtained for the two positions in dBm The third row shows the difference between the selected frequencies and the difference between the two corresponding measurement values Parameters and status On the spectrum analyzer menus the following parameters and status informa tion will be displayed NOTE A selection of an offset frequency ...

Page 110: ... overall results of the current test and the signaling status Test PASS All measurement results of the current test are within their limits FAIL This mark indicates that test limits have been violated by the measure ment results four hyphens Will be displayed when the measurement has not been started yet or when there are no limits available for the current test Status Signaling status from the 44...

Page 111: ... fields you set the markers to the required horizontal positions bit values The cor responding result fields deg show the measurement values obtained for the two positions in degrees The third row shows the difference between the selected bit positions and the difference between the two corresponding measurement values of the burst test menu On the μs entry fields you set the markers to the requir...

Page 112: ...base channel is used throughout this manual The GSM specifica tions use the term frequency channel C0 of the cell allocation or BCCH car rier NOTE Section Basic specifications of GSM bands on page 112 gives an overview of the channel numbers used in the various GSM systems With the help of the information provided there it is also possible to calculate the RF frequency from the channel number NOTE...

Page 113: ...NOTE HalfRate is supported by many types of mobiles available However the net work operators are reluctant to use this feature as they are mainly afraid of loosing speech quality NOTE FullRate is what GSM started with and what is still the default Codec type NOTE Enh FullRate enhanced full rate is a new Codec algorithm providing better speech quality than Full Rate PASS All measurement results of ...

Page 114: ...ire line of softkey labels will change to provide access to additional functions A description of the softkeys displayed on call level can be found in section Softkeys at call level on page 93 v This softkey will make the 4400 page the mobile under test As soon as the paging is in progress the label will change to Stop Paging to allow termination Note The 4400 will not answer to the mobile s acces...

Page 115: ...s given by the single value above the bar displays 113 in this example The following information can be found in the results table This menu offers you specific display functions to evaluate both the rising and the falling edge of the burst in great detail Here you will find all functionalities to check all details of that part of the burst that should have a constant power level Curr Current meas...

Page 116: ...all level on page 93 for details A push on this softkey initiates a BS originated call setup The 4400 calls the number of the mobile stored on the Willtek test SIM The label of the softkey changes to STOP Notes The base station will always call the number of the test SIM card 001 01 0123456789 first The second number the base station will call is the num ber of the older SIM cards 001 01 123456789...

Page 117: ...tarts the bit error rate measurement BER At the same time the 4400 opens the audio loop The softkey changes to Stop BER Stops the BER measurement and tells the mobile to open the internal loop At the same time the 4400 closes its audio loop The softkey changes back to Start BER Starts the concurrent display of minimum and maximum val ues This is like a peak hold and a minimum hold function for eac...

Page 118: ...ot register One of the synchronized mobiles is commanded to the traffic channel e g through remote control of the mobile and starts transmission reception on the assigned traffic channel Pushing this softkey freezes the live display This means that the measurements taken last will be kept on display and no new measurements will be shown The label of the softkey changes to Unfreeze Pushing the soft...

Page 119: ...les The current TCH an be changed by remote control of both the 4400 and mobile Basically all activities are a combination of remote control of the mobile and adequate settings of the 4400 Testing with reduced signaling is started by pushing the Reduced Sig softkey or by the SCPI remote command CALL GSM RSIGnaling As soon as you push the Release Call softkey the reduced signaling mode will be term...

Page 120: ...rsts and normal bursts for the various GSM bands Measurement limits on page 104 this is the menu to enter the various test limits except for power measurements These limits define the accept able range of measurement results As long as all results are within the acceptable range a test will be marked as PASSed Any measurement result violating the acceptable range entered here will cause the entire...

Page 121: ...ows the mobile to identify base stations belonging to different national networks Note While scanning the frequency range for suitable base stations the mobile will first look at the base station s FCCH frequency correction channel and then at the SCH Entry range 0 7 Default value 2 BCC The Base station Colour Code makes it easy for the mobile to clearly separate between several neighbouring base ...

Page 122: ... form a cell Entry range 0 65535 Default value 1 DRX Discontinuous Reception tells the mobile not to listen to the paging channel in every multiframe but only e g to every second or third The mobile is assigned to one of several paging groups depending on its IMSI Paging groups allow the network to handle a higher amount of mobiles within a cell while the mobiles save battery power The number of m...

Page 123: ...H or SDCCH Default value FACCH Assignment GSM knows two different TCH assignment procedures that can be selected here TCH Traffic Channel Early Assignment means that the mobile will be guided on a TCH as soon as possible In case of a mobile originated call this means before the call has been routed com pletely in case of a mobile terminated call this will be the case as soon as the 4400 receives t...

Page 124: ...late can be set using the corresponding PTT menu The menu shown below is for the random access bursts TCH Power Change In GSM the mobile can be commanded to use a certain power level The command to do so can either be trans mitted on the FACCH Fast Associated Control Channel or on the SACCH Slow Associated Control Channel The main difference is timing of course Commands transmit ted on the FACCH s...

Page 125: ...ed easily by the template stretching out for the entire width of the menu Guides you to the menu for entering the limits of random access bursts Those bursts are significantly shorter than normal bursts therefore the display on screen only covers about half of the width Normal Sets the limits for the normal bursts either to Auto mode or to manual mode Fix In Auto mode the 4400 will always use the ...

Page 126: ...d reading the upper range Paging Sets the limits for the random access bursts either to Auto mode or to manual mode Fix In Auto mode the 4400 will always use the PTT limit param eters as given by the relevant GSM specifications In manual mode Fix only the limits entered on the random access burst PTT menu will be used regardless of GSM band and the mobile s peak power level Note More details regar...

Page 127: ...t value given in line 3 until the burst starts the mobile must not exceed its nominal output power level by more than 4 dB From 553 to 561 μs latter value given in line 6 the measured power level must be at least 4 dB lower than the nominal output power level Entering and reading the lower range NOTE More details regarding the PTT limits can be found in section PTT limits for various GSM bands on ...

Page 128: ...evel minus 1 dB The same limit for the power level applies from 20 μs after the beginning of the burst value given in line 3 From 543 μs i e in the ramping down phase of a burst the minimum power level is not really an important criterion Measurement limits On all tests the 4400 either displays a PASS or FAIL indication The bar display available for many tests gives a graphical orientation of the ...

Page 129: ...d positive deviation from the nominal value These limits are preceded by the sign If a measurement can have positive result values only the lower limit is 0 in most cases especially for error rates where the optimum is 0 no error For these measurements only an upper limit maximum can be entered Example The limits for the frequency error in the 900 MHz band have been set to 90 0 Hz This means that ...

Page 130: ...ency Err 1800 The frequency error is computed as the slope of the regression line of the phase error over time It tells you how well a mobile can synchronize to a base station his entry field allows you to specify the symmetrical limit for GSM 1800 1900 systems GSM 1800 specifications specify a maximum permissible frequency error of about 180 Hz Note This field is applicable to GSM 1800 and GSM 19...

Page 131: ...e The RBER is calculated for bit classes Ib and II only Here you enter the permissible maximum for the RBER on the class Ib bits RBER II The Residual Bit Error Ratio is similar to the BER with the following exception all frames the mobile detects an error in are rejected and not used for the RBER Thus only those frames are included in the RBER that were accepted by the mobile The RBER is calculate...

Page 132: ...eds the limit a FAIL is deter mined and displayed Example If the MS Pwr setting is 23 dBm and the limit is 3 dB then a measured value of 20 1 dBm is within the limits and the result is PASS If however the measured value is 19 8 dBm then the result exceeds the limits and the 4400 displays FAIL The Power Limit screen is divided into two sections for the lower 800 to 1000 MHz and the upper 1800 to 20...

Page 133: ... All measurement results obtained for a burst test have to be within the limits as entered on this menu in order to make the entire burst test PASS If a single corner point limit in only one of all bursts measured is violated the whole burst test will be marked as FAIL NOTE Separate limits and defaults exist for GSM 1800 and GSM 1900 If the selected upper band is GSM 1800 the limits for this band ...

Page 134: ...s to transmit on Any power level equal to or above the level entered here will be in the compliant range while any level below will violate the test limits and cause the entire test to be marked FAIL Upper These are the entry fields for the maximum RF power level the mobile is allowed to transmit on Any power level equal to or below the level entered here will be in the compliant range while any l...

Page 135: ...M bands PTT limits for various GSM bands Here you will find the PTT and the related limits for the various GSM bands Voice coding A short introduction to GSM voice coding bit classes and diagonal interleaving MS power classes This table gives all the information on the coding of the MS power classes for various GSM bands Coding of RX Qual Here you will find a table explaining the coding of the par...

Page 136: ...again are managed by the big boss within a network the mobile station switching center MSC The MSC administers all calls within its region it knows which mobiles are located there checks their authentication and will pass on information to the top in order to make it possible for the telecommu nications network to page a mobile and to put through a call The MSC is there fore directly linked to the...

Page 137: ...me slot is 156 bit periods or 577 μs Eight time slots numbered from 0 to 7 form a TDMA frame many times just simply called a frame that is then 4 615 ms long During a time slot 148 useful bits are transmitted 114 bits out of that are real data The remaining bits are used to avoid timing conflicts and to synchronize the receiver to the bit stream The meaning of the different data transmitted within...

Page 138: ...s The three tail bits bear no information Consequently no data will be lost if the burst does not exactly catch the time slot or if the bursts of the mobiles transmitting in the previous or subsequent time slots are slightly too long or not perfectly synchronized Notes The propagation time required by a radio wave to travel 1 km is approx 3 3 μs the duration of one bit in GSM is approx 3 7 μs Usua...

Page 139: ...e in GSM radio communication So it is no wonder if the term strikes you as being somewhat mysterious and obscure Here is an example to shed some light on the subject MS call A MS wants to set up a call in the example below The signaling necessary to set up that call is translated into common language to make the procedure more understandable During a MS call the basic signaling between your 4400 a...

Page 140: ...he signaling software of the unit under test What the CCITT is for analog radio communication the GSM Specifications are for GSM The GSM Specifications define the maximum deviations from the expected values allowed for a mobile under test and how to measure those devi ations Please find below some of the most important GSM test parameters their meaning and the usual test limits NOTE Numbers and sy...

Page 141: ...mobile has to fit precisely into a so called power time template BER Bit Error Ratio The BER is the ratio of falsely decoded bits in relation to all bits transmitted GSM uses different bit classes The main difference between those bit classes is the level of error protective coding during transport over the radio interface Class Ia bits are very significant bits that are well pro tected Class Ib b...

Page 142: ...set code Band Australia 505 01 Telstra MobileNet Telstra 900 1800 Australia 505 02 Singtel Optus Ltd YES OPTUS Optus 900 1800 Australia 505 03 Vodafone Pacific Pty Ltd VFONE AUS 900 1800 Power control level Nominal output power dBm Tolerance dB 0 43 GSM phase 1 only 2 1 41 GSM phase 1 only 2 0 2 39 2 3 37 3 4 35 3 5 33 3 6 31 3 7 29 3 8 27 3 9 25 3 10 23 3 11 21 3 12 19 3 13 17 3 14 15 3 15 13 3 1...

Page 143: ...0 systems Power control level Nominal output power dBm Tolerance dB 29 36 2 30 34 3 31 32 3 0 30 3 1 28 3 2 26 3 3 24 3 4 22 3 5 20 3 6 18 3 7 16 3 8 14 3 9 12 4 10 10 4 11 8 4 12 6 4 13 4 4 14 2 5 15 28 0 5 Power control level Nominal output power dBm Tolerance dB 22 29 reserved reserved 30 33 2 31 32 2 0 30 3 1 28 3 2 26 3 3 24 3 4 22 3 ...

Page 144: ...ion 12 20 PTT limits for various GSM bands Depending on the GSM band and the mobile s peak power level GSM specifica tions define different limits for the PTT These limits can be found in the table below 5 20 3 6 18 3 7 16 3 8 14 3 9 12 4 10 10 4 11 8 4 12 6 4 13 4 4 14 2 5 15 0 5 16 21 reserved reserved ...

Page 145: ...ing or tester But if you take away the te the remaining fragment of the original word could stand for all kinds of things sister mister oyster Easter GSM 400 GSM 850 and GSM 900 GSM 1800 GSM 1900 Between the active bursts the residual output power shall not exceed the following levels 59 dBc or 54 dBm whichever is the higher Exception For the time slot pre ceding the active slot the limit is 59 dB...

Page 146: ...bits of classes Ia and Ib are converted into 378 bits by a mathematical process convolutional coding adding redundancy This is like formulating an important statement in several different ways so that the information will be saved in at least one of its forms During the decoding process the intact parts of the different forms of the statement are looked for So convolutional coding is a means of er...

Page 147: ...its MS report is coded as follows NOTE When you perform RX tests just compare the error ratios of bits of classes Ia and II when the connection is disturbed or at low signal levels You will find that the error ratios for class Ia bits are whole orders less than for class II bits NOTE A similar technique is used for coding the signaling bits something called fire coding in GSM terms There however a...

Page 148: ... of RX Lev For the MS Info message the mobile under test estimates the RF power level at which it receives the base station The RX Lev parameter reported back by the mobile in its MS report is coded as follows 2 0 4 0 8 3 0 8 1 6 4 1 6 3 2 5 3 2 6 4 6 6 4 12 8 7 12 8 RX Lev RF power in dBm 0 110 1 109 k 110 k 62 48 63 48 ...

Page 149: ...ns for using the asynchronous mode Generator Analyzer within the 4460 GSM System Option and 4468 EDGE System Option Topics discussed in this chapter are as follows Overview on page 126 RF generator on page 127 Phase frequency analyzer on page 132 Burst analyzer on page 135 Alignment on page 138 Spectrum measurements on page 143 Parameter menus on page 157 ...

Page 150: ...nt the 4400 will analyze the bursts received in terms of phase and frequency error Burst analyzer Similar to the standard burst measurement the 4400 will analyze the shape of the bursts received using the standard power time template Alignment A predefined series of checks and alignments can be carried out depending on the type of mobile phone Parameter menus The most frequently used parameters ca...

Page 151: ... in order to stimulate pure RF circuitry In addition AM signals can be generated for AM suppression tests The AM Signal Generator is an option The RF generator menu consists of the following main areas The system area allows to set the generator frequency either in MHz or in GSM channel numbers The signal type area is where you select bursted or continuous signals The modulation area allows to set...

Page 152: ...orresponds to a valid GSM channel number on the Freq entry field For details regarding GSM frequency ranges check with section Basic speci fications of GSM bands on page 109 NOTE When the frequency entered corresponds to a valid GSM channel number on the basis of the current settings of the two selection fields above this entry field the 4400 will automatically display the channel number and an of...

Page 153: ... burst or continuous Timeslot Selection field to specify the time slot during which the burst will be generated Selections possible 0 to 6 NOTE The level set on this entry field will only be correct when the load impedance is 50 ohms NOTE Setting continuous means that there will be a constant RF output power level without power ramping The generated RF signal can still be GMSK modulated see descri...

Page 154: ...l start with four ones and the current four bits will always be the inverted value of the previous four bits 1 10 0 i e the sequence will start with eight ones and the current eight bits will always be the inverted value of the previous eight bits PRBS 9 i e a pseudorandom bit sequence NOTE Setting none means that the RF output signal generated by the 4400 will be unmodulated i e a pure carrier si...

Page 155: ...ation is selectable only if the signal type is continuous The carrier can be modulated with a definable sine wave If AM modulation is selected the Data and other fields disappear and are replaced by input fields for the AM parameters NOTE In case any PRBS has been selected random data will be transmitted continu ously on all time slots when Signal type continuous has been selected with out repetit...

Page 156: ...cy error measurements of the RF signal received at the RF IN OUT connector Using the phase frequency analyzer The RF analyzer takes measurements in asynchronous mode without any call processing functions Any Coupling loss table defined in the appropriate menu will be used for asyn chronous measurements as well Before starting a measurement the radio frequency to be measured on has to be entered Th...

Page 157: ...ry range 800 to 1000 MHz and 1700 to 2000 MHz in increments of 10 Hz NOTE To gain access to this entry field either enter a valid GSM channel number on the Channel entry field or enter a frequency that corresponds to a valid GSM channel number on the Freq entry field NOTE For details regarding GSM frequency ranges check with section Basic speci fications of GSM bands on page 109 NOTE To gain acces...

Page 158: ... 4400 will automatically display the cor responding channel number as the default on this entry field NOTE When the frequency entered on the Freq entry field corresponds to a valid GSM channel number on the basis of the current settings of the two selec tion fields above this entry field the 4400 will automatically display any off set from the nominal GSM channel frequency as the default on this e...

Page 159: ...ell Before starting a measurement the radio frequency to be measured on has to be entered There are entry fields available for these parameters in the lower area of the menu just above the softkeys The measurement results and the display markers are similar to the corre sponding areas and fields of the standard GSM test menu Parameter fields of the burst analyzer The radio frequency to measure on ...

Page 160: ... to a valid GSM channel number on the Freq entry field NOTE For details regarding GSM frequency ranges check with section Basic speci fications of GSM bands on page 109 NOTE To gain access to this entry field either enter a valid GSM channel number on the Channel entry field or enter a frequency that corresponds to a valid GSM channel number on the Freq entry field NOTE For details regarding GSM f...

Page 161: ...ec tion fields above this entry field the 4400 will automatically display the cor responding channel number as the default on this entry field NOTE When the frequency entered on the Freq entry field corresponds to a valid GSM channel number on the basis of the current settings on the two selec tion fields above this entry field the 4400 will automatically display any off set from the nominal GSM c...

Page 162: ...ipt for example for a new type of mobile phone Application Many mobile phones are checked repaired and aligned according to the manu facturer s test procedures These procedures consist of test steps typically involving stimulation of the mobile phone with a modulated or unmodulated signal In most cases the RF power or the modulation spectrum is measured at a test point and compared with given limi...

Page 163: ...ields allow you to select the type of mobile phone under test and the next test step for the selected phone respectively Type This scroll field allows you to select a mobile phone The 4400 is deliv ered with a few examples scripts for more mobile phones may be available from the mobile phone manufacturers from Willtek s support team or from Willtek s web pages Step For each selectable mobile phone...

Page 164: ...rogress when averaging results the averaging functions can be selected by softkey see below The counter and all measurement results are reset with the Reset softkey Softkeys on the alignment screen The softkeys provide different functions to control the functions and the result output This softkey can be used to start an averaging function over the measurements It affects both the spectrum measure...

Page 165: ...rules apply List of test steps The preparation includes the definition of the names of the steps which should appear in the Step scroll box This definition is given by the gui STEP a b c state ment a b c are to be replaced by the text for the different steps cases If you want to change the sequence of steps just reorder them in the gui statement Initialization An additional initialization phase se...

Page 166: ... example below User instructions before the start of a measurement should be placed in a message box Example msgbox Settings done OK status inkeywait Progress indication text You can display a message for exam ple to explain the ongoing test step Example open GUI as 1 sub gui cmd print 1 cmd end sub gui STEP Ch 60 55dBm Setup and measurement commands You can issue 4400 SCPI commands by sending the...

Page 167: ... spectrum measurements are performed and displayed Spectrum measurements Measurements of the modulation spectrum and the adjacent channel power due to switching transients or due to modulation are accessible with a push on the Spectrum softkey Alternatively the measurements are also accessible through the TOOLS Spectrum keys The spectrum analyzer menus provide test capabilities to evaluate the RF ...

Page 168: ...rameters This section provides an overview of the parameter and status display fields Access to the spectrum measurement menus For spectrum measurements in asynchronous mode select the system option e g GSM from the Welcome menu and push the Gen Ana softkey Enter the center frequency of the transmitted signal to be measured and push the Spec trum marker tab Alternatively the measurements are also ...

Page 169: ... horizontal axis in MHz The selection field Max Level allows to set the maximum power level to opti mize the vertical resolution Display field dBm shows the maximum RF power level measured on the center frequency Selection fields Res BW and Span allow to set the resolution and frequency span for the horizontal axis of the live display Max Level This selection field allows to set the RF power level...

Page 170: ...F modulation spectrum curve the averaging function This means that a user definable number of the continuous measurements will be taken and the single measurement results will be averaged The result will be a smooth curve that shows characteristics of the spectrum curve better than the single measurements NOTE The resolution settings available depend from the span of the live display The following...

Page 171: ...harged and the series of measurements will be started anew A reset of the averaging process can also be achieved by pushing the Reset softkey When the number of measurements taken display field Count exceeds the number of measurements specified for the averaging process Avg entry field always the last Avg measurements will be averaged and displayed in the live display In case the live display is f...

Page 172: ...pose of this measurement is to verify that the mobile s modulator does not create sideband emissions that would then disturb transmission on adjacent traffic channels This measurement will test the following internal stages of the mobile under test channel synthesizer Gaussian baseband filter and the I Q modulator The following defects of the mobile might be detected with this measurement neighbor...

Page 173: ...important tools of the spectrum analyzer A glance into the GSM specifications The ACPM measurements refer to section 4 2 Output RF Spectrum of specifica tion GSM 11 10 Mobile conformance specification Radio transmission and reception Section 4 2 1 specifies various measurements for the spectrum due to modula tion and wide band noise The most important measurements are through a 30 kHz filter resol...

Page 174: ... updated continuously as long as it has not been frozen The vertical axis of the spectrum live display is in dBc the horizontal axis in MHz The resolution of the display is fixed and follows the appropriate GSM specifica tion The reference level shown in the lower left corner of the display is the power level measured at the center frequency in a 30 kHz bandwidth All levels displayed in the live d...

Page 175: ...g entry field the number of the current measurement will be displayed in red on the Count display field As soon as the number of measurements taken is equal or larger than the number of measurements specified for the averaging process the number on the Count display field will turn blue Important to note The entry range for the Avg entry field is from 1 to 500 The Avg entry field is not accessible...

Page 176: ...o read the exact measurement at any position simply use the display markers The current main parameters and the status are displayed in the lower right corner of the menu The softkeys provide access to important tools of the spectrum analyzer A glance into the GSM specifications The ACPM measurements refer to section 4 2 Output RF Spectrum of specifica tion GSM 11 10 Mobile conformance specificati...

Page 177: ...set the maximum power level to opti mize the vertical resolution The horizontal resolution of the display is fixed and follows the appropriate GSM specification Entry field of the live display Max Level This selection field allows to set the RF power level represented by the top horizontal line of the live display Selections possible are from 40 dBm to 0 dBm in steps of 10 dB NOTE In addition to t...

Page 178: ...every single of the 27 measurement frequen cies will be displayed on screen The number of single measurement runs taken into account is shown on the Count display field The softkey will change to Stop Peak Important to note A reset of the peak hold process can be achieved by pushing the Reset softkey In case the live display is frozen and unfrozen using the appropriate softkey during a peak hold p...

Page 179: ...ch the minima and maxima display function off again To freeze the current display for further or detailed analysis or for printing push this softkey The softkey will change to Unfreeze Note After the Freeze softkey has been pushed all mea surements and any ongoing averaging process continue in the background but the display is not updated This means that even when the live display has been frozen ...

Page 180: ...al posi tions offset from the carrier in MHz The corresponding result fields dBc show the measurement values obtained for the two positions relative to the RF power level of the carrier The third row shows the difference between the selected frequencies and the difference between the two corresponding measurement values To freeze the current display for further or detailed analysis or for printing...

Page 181: ...uencies and the difference between the two corresponding measurement values Parameter menus The Parameter menus allow you to access the parameters relevant to asynchro nous mode at a more detailed level which need not be changed in everyday use To access the Parameter menus press the Param softkey on the Generator menu and then press the appropriate marker tab NOTE A selection of an offset frequen...

Page 182: ...arameter menus 158 4460 GSM System Option and 4468 EDGE System Option Version 12 20 The following parameter menus are available in asynchronous mode Power time templates PTT see page 98 Measurement limits see page 101 Corner points see page 106 ...

Page 183: ...Version 12 20 159 Chapter 4 EDGE Call Mode Operation This chapter describes the functionality of the 4468 EDGE System Option in call mode Topics discussed in this chapter are as follows Overview on page 160 EDGE tests on page 160 EGPRS basics on page 173 ...

Page 184: ... short guideline on how to connect a mobile and perform tests Need to know more about the user interface of the 4400 Just navigate to Menus and levels on page 21 and you will find all you need to know This chapter is divided into three subsections EDGE tests Here you will find everything regarding the available tests e g Power EVM Frequency how to set up the instrument and how to read the results ...

Page 185: ...nts and the reduced signaling functionality this basic test menu is an ideal test time saver What it does The basic test menu provides you with Graphic overview of the ongoing signaling In addition to information described in Call graph on page 162 the call graph provides an additional EGPRS Attach field to indicate whether the mobile under test is GPRS attached The EGPRS Attach field signals by w...

Page 186: ...ated network Start Test softkey starts a test Input parameters For test parameters to be entered before starting a test see Test parameters on page 168 Tool bar A tool bar is accessible from the GPRS Basic menu It gives access to additional functionality The GPRS synchronous mode tool bar includes the following features Spectrum Utilities Audio Config To access the GPRS synchronous mode tool bar p...

Page 187: ... the Start Test softkey When an uplink channel has been set up successfully the Uplink field appears with a green background and the call graph will look as follows When the mobile phone has registered its GPRS capabilities with the network simulated by the 4400 the EGPRS Att field lights green The field shows a white background as long as there is no mobile phone in the GPRS Attached state The re...

Page 188: ...nd the Start Test softkey will return NOTE This test will only work with a test SIM being used in the mobile IMEI SV Here the 4400 displays the IMEI International Mobile Equipment Identity received from the mobile The IMEI is the registration number of the mobile hardware which identifies it internationally The IMEI is stored inside the mobile s electronics and can only be read out by the 4400 thr...

Page 189: ...lot in the power limits menu This menu is a submenu of the Test parameters menu Freq error Here the 4400 displays the results of the statistic evaluation of the frequency error measurements for the selected slot The frequency error is shown in Hertz RMS EVM The results of the statistic evaluation of the RMS EVM error vector magnitude measurement are displayed on this bar The error vector magnitude...

Page 190: ... results displayed on the EGPRS Basic menu apply to the slot set by the input parameter Results for UL Slot The EVM Frequency display shows the test results and statistical values for various modulation quality parameters These include Level the RF power level received by the 4400 in dBm RMS EVM the error vector magnitude rms averaged over a burst EVM is a relative value and shown as a percentage ...

Page 191: ...lates the PTT limits for the multislot operation The message FAIL is displayed if a measure ment in any time slot involved in the test violates the PTT limits The message PASS is displayed if a measurement in all time slots fulfills the PTT limits Level Display the results of the statistical evaluation of the power level measurements in the time slot set by the input parameter UL Slot EGPRS Burst ...

Page 192: ... message FAIL is displayed if a measurement in any time slot involved in the test violates the PTT limits The message PASS is displayed if measurements in all time slots fulfill the PTT limits Display markers The 4400 offers two markers for easy reading of the graphic display in the burst test menu Test parameters In this section the test parameters to be entered before starting a test are summari...

Page 193: ...ote The number of downlink slots is selectable only after a GPRS Attach as the mobile informs the 4400 of its multislot class during the GPRS Attach procedure The valid range depends on the multislot class n x y z of the mobile under test displayed in the Multislot class field see Uplink and downlink assignments on page 176 No DL Slots must be less than or equal to the parameter x and the sum of N...

Page 194: ...et a number of system parameters including the power time templates test limits and the corner points For basic information on system parameters see the System Parameters section in the GSM or GSM GPRS call mode chapter To access a GPRS Parameter menu press the Param softkey while working at the test level of any GPRS test There are six different GPRS Parameter menus selectable by the respective m...

Page 195: ...that the cells belong to different Routing Areas The valid range is 1 7 RA Code The Routing Area Code as broadcast in the SI13 Rest Octets The valid range is 0 255 Reset To reset all parameters in the 4468 EDGE System Option to default values press the Default softkey Help To access the Help menu press the Help key EGPRS PTT parameter menu In EGPRS mode the power time template differs from the nor...

Page 196: ...and 4468 EDGE System Option Version 12 20 EGPRS Limits menu In this menu limit values can be entered for the modulation quality parameters of the Basic and EVM Frequency menus Other parameter menus The Power Limits and Corner Points menus are the same as in GSM and GSM GPRS ...

Page 197: ...nt because it is not rotating on a circle as it does for GMSK It can actually change from one phase state to any of the eight phase states having the effect that the amplitude may cross near the origin of the I Q plane In order to avoid this the whole I Q plane is rotating by 22 5 per symbol which ensures that the signal never reaches the origin This effect has an impact on the type of amplifier t...

Page 198: ...SK modulation measurements are essential to ensure that the power level lies within the allowable limits Note that the cell radius can be lower with 8 PSK modulation than with GMSK due to the increased number of symbols To minimize unnecessary interference with adjacent cells and to ensure proper handover between cells the power control mechanism in GSM and GPRS uses further power steps with exact...

Page 199: ... the ideal one see figure below the EVM is measured separately for each symbol Standard measurement results to observe are the RMS averaged EVM for all the symbols of a burst the maximum EVM within the burst and the 95 EVM The latter is the error vector magnitude not exceeded by 95 of the symbols within a burst the parameter effectively disregards the highest 5 of all error vectors The error vecto...

Page 200: ...onents may produce side effects due to voltage drops or addi tional heat when multiple slots are transmitted or received Therefore most manufacturers ensure product quality by multislot tests Uplink and downlink assignments GPRS is used to transmit packets or blocks of data from one end to another While circuit switched connections are bidirectional and block a channel in both directions for the d...

Page 201: ... the network directly close loop power control and depending on the setting of the open loop power control parameter Alpha partially also by the mobile phone open loop power control In case of the open loop power control the transmit power depends on the received signal strength A real network can even set different uplink power levels for the individual time slots assigned to the mobile This is a...

Page 202: ...he user requests a GPRS service e g by selecting an appropriate entry on the user interface of the mobile phone 4 The 4400 and the mobile will communicate via UL DL TBFs to exchange protocol information When the procedure is concluded successfully The mobile phone will usually indicate that it is registered to a GPRS network e g by the word GPRS in its display The 4400 will indicate the multislot ...

Page 203: ...ter provides task based instructions for using the asynchronous mode Generator Analyzer of the 4468 EDGE System Option Topics discussed in this chapter are as follows Overview on page 180 RF generator on page 181 EVM frequency analyzer on page 186 Burst analyzer on page 188 Alignment on page 191 Parameter menus on page 197 ...

Page 204: ...nalyzes the modulation quality of the received bursts Burst analyzer Similar to the standard burst measurement the 4400 will analyze the shape of the bursts received using the EDGE power time template Alignment A predefined series of checks and alignments can be carried out depending on the type of mobile phone Parameter menus The most frequently used parameters can be adjusted to your needs in th...

Page 205: ...stimulate pure RF circuitry The RF generator menu consists of the following main areas The system area allows to set the generator frequency either in MHz or in GSM channel numbers The signal type area is where you select bursted or continuous signals The modulation area allows to set the modulation parameters The RF Out area allows to define individual output levels for the different time slots w...

Page 206: ...orresponds to a valid GSM channel number on the Freq entry field For details regarding GSM frequency ranges check with section Basic speci fications of GSM bands on page 109 NOTE When the frequency entered corresponds to a valid GSM channel number on the basis of the current settings of the two selection fields above this entry field the 4400 will automatically display the channel number and an of...

Page 207: ...constant power level burst single slot or multislot The latter can have individual power levels at each of the eight time slots per TDMA frame Timeslot Selection field to specify the time slot during which the burst will be generated Selections possible 0 to 6 NOTE The level set on this entry field will only be correct when the load impedance is 50 ohms NOTE This entry field is not accessible if i...

Page 208: ...to account any tail bits or multiframe structures with idle frames If PDCH is selected a signal with one or multiple time slots of channel combina tion 13 PDTCH F PACCH F PTCCH F is generated The PDTCH F blocks can be split into RLC MAC headers with user definable contents and a pseudorandom NOTE When continuous has been selected on the Signal type entry field this entry field will not be availabl...

Page 209: ... level entered in the Level field to all time slots and the RF Out Timeslot entry field for individual time slots will not be accessible RF Out Timeslot Allows setting the RF power level of each time slot 0 7 if the RF Out Standard check box is not selected For each time slot any RF power level within the specified range usually 120 10 dBm is permissible The following softkeys are available on the...

Page 210: ...e same as the corresponding areas and fields of the call mode test menu Parameter fields of the RF analyzer The radio frequency to measure on and the trigger functions are set in this menu area System Selection field to set the frequency range for the channel numbers above 511 Selections possible GSM 900 1800 or GSM 900 1900 uplink downlink Selection field to specify either the uplink or the downl...

Page 211: ... NOTE When the frequency entered corresponds to a valid GSM channel number on the basis of the current settings of the two selection fields above this entry field the 4400 will automatically display the channel number and an offset if any on the two entry fields of this line NOTE In case the optional frequency extension has been installed on your 4400 the frequency range available will be differen...

Page 212: ...o the expected carrier The frequency error is measured in Hertz The measurement accuracy depends on the time base used internal TCXO OCXO or an external reference Origin Offset The origin offset indicates the accuracy of the I Q modu lator s DC setup it is usually an undesired leakage produced due to a DC offset in the phone s I Q modulator It is measured in dBc Burst analyzer To gain access to th...

Page 213: ...or EDGE The graphic display shows the measured RF power versus time relative to the average power level in the displayed time slot with the highest power The graph of the power level as a function of time can be shown for one or more time slots From the up to four time slots that can be received by the 4400 any combination of consecutive bursts can be measured using the First Burst Number of Burst...

Page 214: ...entry field NOTE For details regarding GSM frequency ranges check with section Basic speci fications of GSM bands on page 109 NOTE To gain access to this entry field either enter a valid GSM channel number on the Channel entry field or enter a frequency that corresponds to a valid GSM channel number on the Freq entry field NOTE For details regarding GSM frequency ranges check with section Basic sp...

Page 215: ...of sequence Each step can consist of a continuous or burst signal being sent to the phone for stimulation and or a signal from the phone being measured in terms of power or spectrum NOTE When the frequency entered on the Freq entry field corresponds to a valid GSM channel number on the basis of the current settings on the two selec tion fields above this entry field the 4400 will automatically dis...

Page 216: ...For modulator alignment purposes the RF power at 67 kHz is often compared with the power at the nominal carrier frequency For these purposes the 4400 provides a screen combining signal generator power and spectrum analyzer functions with the scripting functionality to give a powerful tool for quick and precise tests and alignments The Alignment screen allows you to select a script for a mobile pho...

Page 217: ...ected by its name from the Step scroll box In each new step generator and analyzer settings may change as well as the type of measure ment The most important generator Gen and analyzer Ana settings are shown below the Step scroll box Instead of selecting a step with the scroll box you can select a new step with the softkeys see below Results and Markers The Spectrum display can show you the spectr...

Page 218: ...power measurements If you want to repeat a test that is one step above the cur rent test in the list of test steps a push on this softkey is sufficient to stop the current test and start the wanted test step The list is circular If there is no previous step available because the present step is the first one in the test list the 4400 continues with the last entry at the end of the list This softke...

Page 219: ...r example with settings that are common for all the test steps such as the coupling loss All these preparatory commands including the list of test steps are placed in an empty case statement Example case Elements of the scroll box gui STEP Ch 56 55dBm Ch 700 85dBm Ch 700 TX IQ scpi RFGenerator STYPe CWAVe scpi CONFigure COUPloss DATA 3210_1 5_2 897 6 1 5 1747 8 4 0 scpi CONFigure COUPloss STATe ON...

Page 220: ...with_RF_cable 902 0 1 5 1742 8 2 0 scpi CONFigure COUPloss STATe ON case Ch 60 80dBm scpi RFGenerator GSM STATe ON scpi RFG GSM MODulation TSEQuence STATe OFF scpi RFGenerator GSM FREQuency 947067710 scpi RFGenerator GSM LEVel 80 case Ch 700 55dBm scpi RFGenerator GSM STATe ON scpi RFG GSM MODulation TSEQuence STATe OFF scpi RFGenerator GSM FREQuency 1842867710 scpi RFGenerator GSM LEVel 55 case C...

Page 221: ...ion Version 12 20 197 Parameter menus The Parameter menus allow you to access the parameters relevant to asynchro nous mode at a more detailed level which need not be changed in everyday use To access the Parameter menus press the Param softkey on the Generator menu and then press the appropriate marker tab ...

Page 222: ...t data channel GPRS Micro Cell Simulation section RA Color Sent in the SI3 and SI4 Rest Octets The normal use is that different different RA Color codes in adjacent cells indicate to the mobile that the cells belong to different Routing Areas The valid range is 1 7 RA Code The Routing Area Code as broadcast in the SI13 Rest Octets The valid range is 0 255 Alpha One of the GPRS Power Control Parame...

Page 223: ...ot be used by the mobile station Default is off PR The Power Reduction field indicates the RF power in the downlink PDCH relative to the BCCH It is used in downlink RLC Data Blocks Valid entries are 0 6 dB 8 14 dB 16 22 dB 24 30 dB default is 0 6 dB TFI The Temporary Flow Identifier field identifies the Temporary Block Flow TBF to which the RLC data block belongs This parameter is used in the down...

Page 224: ...Chapter 5 EDGE Asynchronous Mode Operation Parameter menus 200 4460 GSM System Option and 4468 EDGE System Option Version 12 20 ...

Page 225: ...r provides task based instructions for additional tools within the 4460 GSM System Option and 4468 EDGE System Option Topics discussed in this chapter are as follows Overview on page 202 Configuration on page 202 Utilities on page 222 Audio measurements on page 229 Spectrum measurements on page 228 ...

Page 226: ...pecific option has been installed or install options and new software releases This section consists of the following parts Setup on page 203 In this menu you may select the language of the external keyboard as well as some other settings I O configuration on page 204 This menu allows to set the GPIB address TCP IP parameters and the external printer connected Options on page 211 This menu provide...

Page 227: ...s of the Setup menu External Keyboard This selection field allows to set the language of the external keyboard connected The settings possible are USA default BelgiumFrench BelgiumDutch CanadaFrench CanadaEnglish Denmark France Germany Italy Japan LatinAmericaSpanish LatinAmericaPortugal Netherlands Norway Portugal Spain Sweden SwissFrench SwissGerman UnitedKingdom ...

Page 228: ...printer drivers or alter natively a file format to print out the screens of the Willtek 4400 PCMCIA informs you about the PCMCIA connections currently available Note This area of the menu will only be displayed on units with a serial number below 0911001 Ethernet this display field shows the status of the Ethernet interface Note This area of the menu will only be displayed on units with serial num...

Page 229: ...symbol Settings possible are 5 6 7 8 Default is 8 Stopbit Selection field for the number of stop bits following a symbol Settings possible are 1 2 Default is 2 Parity Selection field for the parity check Settings possible are Even Odd None Default is None Handshake Selection field for the type of hardware handshake These selection fields are not accessible in the current software release Timeout E...

Page 230: ...N Addressing the Willtek 4400 over the LAN Each device in the LAN has its individual unique IP address so that it knows which messages are intended for it and so that other devices are able to identify the sender when the Willtek 4400 broadcasts a message over the LAN The Willtek 4400 supports two ways of assigning an IP address to it The IP address is assigned to the Willtek 4400 by the local net...

Page 231: ...rmat of an IP address is a b c d where a through d are integer numbers in the range from 0 to 255 e g 192 168 217 42 The IP address entered must not be identical with another device in the same LAN Refer to the local area administrator for the assignment of a valid and accessible IP address If IP Setting is set to DHCP the IP address of the Willtek 4400 is automatically derived from a DHCP server ...

Page 232: ... via LAN using the SCPI command set these commands need to be addressed to a specific port of the test set The corresponding port number is set with the help of this entry field The default setting is 49200 For successful remote control over the LAN you will have to use the same port number in the application controlling the Willtek 4400 as defined on this input field Host Name This parameter is u...

Page 233: ...ter the following command line ping address where address is the IP address of your Willtek 4400 The ping should time out if the Willtek 4400 is switched off but there should be responses from your Willtek 4400 if it is up and running If there are pings while the Willtek 4400 is switched off there is another device such as a PC or another test set on the LAN using the same IP address In this case ...

Page 234: ...hed on the IP address is not valid in this subnet or LAN or the 4400 is not properly connected to the network check cabling Check whether the remote PC runs an NFS server software UNIX like operating systems typically include an NFS server applications for Windows are commercially available Parallel port settings Printer This selection field is not accessible as the default setting BMP File to Har...

Page 235: ...options on page 29 for more details on available options The Option Key softkey is used to install additional options see below More information about installed options such as the Audio Option is available upon a press on the Technologies softkey Basic info area This area of the menu provides the following basic information 4405 In the upper left corner of this area the 4400 model is indicated 44...

Page 236: ...e options of the Willtek 4400 require both software and hardware like e g the high precision time base option or OCXO These options can only be installed by the Willtek product specialists Options that are software based only like ACPM for instance may be installed on site The only thing required then is an option key available from Willtek When you have the option key at hands follow the instruct...

Page 237: ...rdware and software revi sions of the various subsystems of your Willtek 4400 The information on display here is very important when tracing problems or discussing upgrade possibilities with the Willtek product specialists Updating the system software Willtek seeks to permanently improve its products and makes new software versions available on the Internet at www willtek com Several different met...

Page 238: ... the network or USB stick from which to install the new software version The box displays the directories and files available on the mounted server disk The Willtek 4400 operating software versions usually carry the file extension tar A server disk can be mounted using the Tools Config I O menu The Status area of the menu is where the Willtek 4400 will display additional information comments and m...

Page 239: ...work onto the internal hard disk and before the EPLD update is completed Otherwise the instrument will not be operable anymore and it will be necessary to return it to the factory or to a Willtek service center Before pushing this softkey consider the consequences Some software versions for instance will not allow to return to the current software version This softkey allows to change from the cur...

Page 240: ...pler being used and the frequency An example of a coupler is the Universal Antenna Coupler The coupling loss menu allows compensation of that attenuation To do so a cpl file is required containing the information about losses on specific frequencies Those cpl files can be created using the file editor within the RAPID environment on an external PC and then loading the file to the 4400 using a flop...

Page 241: ...er on a floppy disk or on an USB memory stick depending on the hardware details of your 4400 Directory Select the corresponding directory e g for the brand of the mobile under test This field allows you to browse the list of coupling loss directories that are available on your 4400 In case the manufacturer of the mobile under test is not listed there check the files in the others directory The 440...

Page 242: ... 4400 How to edit a coupling loss definition already stored on the 4400 1 Call the Welcome menu on screen using the ESCAPE key 2 Start RAPID by first pushing the TOOLS key and then the RAPID marker tab This will call the file manager on screen 3 Using the file manager navigate to the rapid cpl directory 4 Select the file to be edited 5 Push the Open softkey and then the Edit marker tab to start th...

Page 243: ... the Welcome menu of the 4400 The user defined attenuation menu The user defined attenuation menu allows you to enter coupling loss values and frequencies in a menu rather than invoking a text editor On the coupling loss menu select a coupling loss file that you intend to edit or to use as the base of a new coupling loss file Push the Manual Entry softkey of the coupling loss menu to call the user...

Page 244: ...oupling loss file push the Clear softkey To enter a comment or working instruction place the text in the Comment entry field To save all modifications to the current coupling loss file push the Save softkey To save the modifications under a different file name and or in a different directory push the Save as softkey The 4400 will display a pop up menu that allows for selecting entering the path an...

Page 245: ...ated coupling loss files appear at the beginning of the file list Note All coupling loss files are stored in the rapid cpl direc tory The frequency and the coupling loss entered on the two entry fields on the right hand side of the menu will be inserted as a new line Note The new line will instantly appear in the selection field sorted by frequency The line currently selected in the selection fiel...

Page 246: ...hortcuts on the printed circuit board of the phone Access to the Utilities menus Push the TOOLS function key from the Welcome menu The tool bar provides access to the utilities menus with a push on the Utilities marker tab I O trace for GPIB communications This menu allows for monitoring the communication on the GPIB e g to debug a new PC program for remote control of the Willtek 4400 Push the I O...

Page 247: ...he trace consumes more processing power from the Willtek 4400 i e the Willtek 4400 may work slower than without tracing NOTE If you don t need the trace for debugging purposes it is strongly recom mended to go back to the Welcome menu before starting remote control operation A push on this softkey resets the entire I O Trace menu all entries in all areas of the menu will be cleared Before pushing ...

Page 248: ...he battery simulated by the Willtek 4400 The measurement results from the Current Measurement Option will only be displayed if the option is installed A push on this softkey displays the trace of the procedures running on the internal PC Push this softkey to display the trace of the procedures run ning on the internal DSP A push on this softkey displays internal messages and the internal error tra...

Page 249: ...h One end of the cable can be plugged into the 4400 while the other end is open ended The open ends can be used to connect the power supply to a fixture holding the mobile phone Willtek delivers the cable with open ends because these fixtures are manufacturer specific and hence open ends are most universal The Supply entry field can be used to select a supply voltage in the range 0 to approximatel...

Page 250: ...atest measurement In graphical mode the upper results section displays the shape of the current over time for one TDMA frame Selecting the display mode and display properties The numerical display is the default mode To switch to the combined graphical numerical mode push the Graph softkey As a result the current versus time display appears and the softkey description changes to Numeric Push this ...

Page 251: ...ase of the frame is char acterized by preparations for the next uplink slot transmission for example interleaving in the channel coder Understanding the result fields The difference between current minimum maximum and average values is explained in section Statistical data evaluation on page 242 Power This field shows the average power drawn from the simulated battery measured in mW It is calculat...

Page 252: ...urements are an integral part of comprehensive mobile phone testing The 4400 supports modulation spectrum measurements output RF spec trum due to modulation and due to switchting transients measurements The menus differ slightly between call mode calls measurements and non call asynchronous mode Please refer to page 69 or to page 29 respectively ...

Page 253: ...section will explain the built in audio spec trum analyzer functionality of the 4400 Audio measurements test basics In its basic configuration the 4400 does not support audio measurements In order to provide audio test functions you need to install the Audio Option This option provides your 4400 with both an audio generator and an audio analyzer To convert the digital data exchanged between the mo...

Page 254: ...least the 4400 provides the speech codec vocoder options as an additional input and output ports The generated audio signal is converted to a binary coded format which is modulated onto the RF carrier and transmitted over the RF in out connector on the front panel Similarly the RF signal from the mobile can be demodulated decoded and analyzed by the audio analyzer HAZARD The absolute maximum input...

Page 255: ... Audio marker tab Codec A voice codec is used to transform an audio signal into a bit stream that is then transmitted over the RF channel There are two optional codecs available Instead of measuring an analog signal from the AF input or AUX in input the digital audio signal transmitted over the RF traffic channel can also be analyzed The voice coded option is required to translate the binary coded...

Page 256: ...test setups are used for that purpose Testing the mobile s AF input filters A D converter and voice coder In this case the audio signals generated by the 4400 can be used and fed to the mobile using a headset input or an artificial mouth Testing the mobile s voice decoder D A converter and AF output filter In this case the audio signals generated are sent to the mobile under test over the air inte...

Page 257: ...f the AF signal on the AF out connector Entry range 0 0 V rms to 5 599 V rms in increments of 1 mV Level Codec in Entry field to set the volume of the audio signal when it is transmitted over the air interface and therefore connected internally to the input of the 4400 s codec Entry range 55 0 dB F S to 0 0 dB F S in increments of 0 1 dB sine Check box If ticked the output signal will have a sinus...

Page 258: ...uality when testing over the air interface when Enhanced Full Rate Speech is selected this codec algorithm is not suitable for sine wave tones as the audio level will vary NOTE When Codec in is selected as the Signal Destination only sinusoidal signals will be generated as the usable frequency range of all codecs is lim ited to 3200 Hz As a consequence any other waveform would be high pass filtere...

Page 259: ...edia 4 Under File Properties select an appropriate PCM recording format check the allowable formats in the Wave File Specifications section below Remember Nyquist s theorem The sampling frequency should be more than twice the maximum audio frequency 5 Record the signal ensure that the signal is recorded at sufficient voltage level without being distorted 6 Save the recorded signal in a file on the...

Page 260: ...ch means you can record 10 s for replay by the 4400 If a longer signal evaluation is required the wave file can be replayed Simply enable the Auto Repeat field for the 4400 to play the wave file in a loop Signal type settings for wave file replay If WAV file replay is selected additional fields appear in the Signal Type section of the Audio Generator display These fields allow you to set up the wa...

Page 261: ...ut On or the AUX out Off softkeys respectively AUX out Source Selection field Selects the audio signal to be directed to the AUX 4 AUX out connector of the 4400 Choices AF in Codec out and Audio generator Provides direct access to the Parameters menu of the audio generator A push on this softkey stops the generation of audio signals and terminates all audio outputs The softkey will change to START...

Page 262: ...lyzer is described below The AF basic analyzer menu The menu of the AF basic analyzer gives a quick overview of the current measurement results of the most important audio measurements To gain access to this menu push the Basic Analyzer marker tab It consists of three areas most of the menu is occupied by the current measurement results display the parameters area provides access to the most impor...

Page 263: ...eld shows the DC voltage component of the analog audio signal measured Freq Display field In case the signal measured is a single tone signal the frequency of the signal is shown here in Hertz THD N This display field shows the distortion of a 1 kHz single tone sine wave in percent third harmonic distortion THD N stands for third harmonic distortion plus noise SINAD This display field shows the si...

Page 264: ...he AF basic analyzer menu provide direct access to the following functions NOTE When using audio signals for transmission over the air interface the audio frequency should be set in a range between 300 to 3200 Hz as any voice codec will only operate in this frequency range just like a normal telephone line where the audio signal transmitted is also limited to this frequency range NOTE Codec out ca...

Page 265: ...push on this softkey provides access to the statistic data evaluation of the AF basic analyzer measurement results The softkey changes to Normal A push will take you back to the standard display of the AF basic analyzer Note This softkey is not available on the AF spectrum ana lyzer menu A push on this softkey resets the measurement run counter Note This softkey is only available when the statisti...

Page 266: ... toggles the AF in connector between unbal anced default and balanced unbalanced means there is one hot signal line and one ground line This is sometimes also referred to as asymmetric or single ended balanced means that there are two hot signal lines and no ground line there may be a shield This is sometimes also referred to as symmetric differential bridged or floating FFT Window Selection field...

Page 267: ...ic data evaluation The counter can be reset using the Reset softkey Current The display fields of this column show the measurement result values of the current measurement run Min The display fields of this column show the minimum measurement result values obtained during the past Count measurements Avg The display fields of this column show the average measurement result values obtained during th...

Page 268: ... Audio frequency generator Frequency Entry field to set the frequency of the audio generator Entry range 20 Hz to 20 kHz in increments of 0 1 Hz Level AF out Entry field to set the RMS valued output voltage of the AF signal on the AF out connector Entry range 0 0 V rms to 5 599 V rms in increments of 1 mV NOTE This display field does not apply to measurements over the air interface since the codec...

Page 269: ...ol for detecting spurious signals and harmonics Signals from the following sources may be displayed on the spectrum analyzer AF in connector AUX 4 AUX in connector Codec out the output signal of the internal codec The AF spectrum analyzer menu The menu of the AF spectrum analyzer provides a graphical display of the input signal s spectrum To gain access to this menu push the Spectr Analyzer marker...

Page 270: ... sets the resolution of the vertical axis Settings possible are 120 dB 80 dB or 40 dB Avg This entry field allows you to initiate averaging of the last measurements The number of measurements to be averaged can be entered here Valid entries are in the range 1 to 500 an entry of 1 means that no averaging is performed Span This selection field sets the displayed frequency span Valid entries are 4 kH...

Page 271: ...UX in and Codec out AF in means that the signal connected on the AF in socket will be analyzed AUX in will analyze the signal connected to the AUX 4 AUX in connector The setting Codec out finally will forward the audio signal decoded by the 4400 s internal codec to the AF basic analyzer NOTE When using audio signals for transmission over the air interface the audio frequency should be set in a ran...

Page 272: ...Chapter 6 Tools Audio measurements 248 4460 GSM System Option and 4468 EDGE System Option Version 12 20 ...

Page 273: ...Chapter 7 RAPID This chapter describes how to use and how to program RAPID applications Main topics described in this chapter are as follows Overview on page 250 Using RAPID on page 250 RAPID syntax on page 267 Commands on page 275 Functions on page 300 Tables on page 318 ...

Page 274: ...tions A range of functions is available to work with numerical and string variables as well as for input and output handling Tables Should any error occur during editing a program or during runtime this subsection explains the reason for that in detail and gives information on how to trace back an error and to debug it Using RAPID This subsection gives an introduction and explains everything about...

Page 275: ...SCPI RAPID programs are a powerful combination of the simple to use BASIC programming language and the 4400 specific SCPI commands The BASIC instructions implemented are outlined in detail in subsection RAPID syntax while Chapter 8 is fully dedicated to SCPI BASIC commands BASIC Beginner s All purpose Symbolic Instruction Code commands provide the required program sequence They also enable the fur...

Page 276: ...vious editing You may then save the changes by pushing the Yes softkey while a push on softkey No will discard any changes and leave the file as it was Cancel takes you back to the RAPID environment Marker tabs of the RAPID environment The marker tabs offer direct access to the menus of the RAPID environment File menu Loading saving copying renaming and erasing files in general Edit menu Selecting...

Page 277: ...es RAPID basic file area this is a selection field where you may select one of the previously opened RAPID Basic Files The softkeys are used to call specific file functions as e g creating a new file opening a file or deleting a file while the marker tabs give access to the various menus of the RAPID environment File name directory selection area In this area you may manually select a directory a ...

Page 278: ...entry field sets a filter for the file display within the browser area The default setting is and will make the browser display all files with any extension Browser area In this area you may browse through directories just as with any other standard browser As soon as you enter the RAPID environment the file menu is automatically displayed and the browser area is active The most convenient way to ...

Page 279: ... a selection field You may select any file that has been opened or newly created before The RAPID Basic File selection field is available in all RAPID menus A simple push on the Next File softkey or a click on the selection field navigates the cursor to it To select a file simply click on the file name Alternatively push the UP and or DOWN keys until the requested file is highlighted Then confirm ...

Page 280: ...Selection display field The 4400 will prompt you with an entry field to enter the name of the subdirec tory to be created To enter the name use the external keyboard or the typing tabs Copy A push on this softkey allows you to copy the currently selected highlighted file Additional softkey labels will be displayed that allow the following choices OK Copies the currently selected file The 4400 will...

Page 281: ...ed on and online If you confirm by pushing YES the 4400 will print the file highlighted without any formatting Softkey NO aborts the printing process Unmount USB A push on this softkey unmounts the USB interfaces and thus allows to remove an USB memory stick without putting the data stored on it at risk The 4400 will display a prompt on screen Unmount Remove USB stick Confirm the removal of the US...

Page 282: ...e instant access to the various menus of the RAPID environ ment Edit area The Edit area is where you create and edit program code using the built in BASIC type language of RAPID To work on program code we strongly recommend the use of an external keyboard In principle it is possible to do without using the typing tabs but this is a rather time consuming way An external keyboard not only provides m...

Page 283: ...current file under the file name entered in the dialogue box Protect When you push this softkey the 4400 will save the current file under the file name entered in the dialogue box in protected mode This means that the file will be completely inaccessible to any editing attempts Cancel Quits the function and takes you back to the Edit menu with its basic softkeys Search Replace Enables you to find ...

Page 284: ...rrent cursor position towards the end of the file Replace Searches for the text entered on the Find selection field and replaces it with the text entered on the Replace selection field The direction of the search is downwards i e from the current cursor position towards the end of the file Replace All Searches for all occurrences of the text entered on the Find selection field and replaces every s...

Page 285: ...mbols Push the marker tab of the desired letter or symbol That one will appear on the entry field or edit menu and the marker tabs will change back to groups of letters and symbols automatically Run menu The Run menu is where programs are started If there are no syntax or runtime errors encountered the program will smoothly run until it reaches its end and will display its status messages and comm...

Page 286: ...the running RAPID program is displayed The softkeys provide access to important functions of the Run menu like starting a RAPID program The marker tabs give instant access to the various menus of the RAPID environ ment Output area In the output area the 4400 displays the output and status messages created by a running RAPID program NOTE As long as no file has been opened or newly created the marke...

Page 287: ...s that provide you with full information on different aspects of the program run In order to work with this menu in an efficient way we strongly recommend the use of an external keyboard and a mouse In this Debug menu only the softkeys of the 4400 appear in blue Thus they can be easily distinguished from program generated softkeys as those appear in standard orange The areas are RAPID basic file a...

Page 288: ...the external keyboard or the cursor keys and function keys It is not possible to edit the program in this area In order to do so please use the Edit menu To run a program or to execute it step by step please use the appropriate softkeys of the Debug menu In the Debug menu only the first screen line of continued program lines will be highlighted Variable area In the variable area the 4400 displays ...

Page 289: ...ng the Focus Next softkey until the Vari able area gets highlighted 2 Select the variable you would like to alter with the cursor simply use the cursor keys to do so The currently selected variable is indicated by a thin black frame 3 Activate the variable editing mode by confirming your selection with a push on the Enter function key on the 4400 or a push on the external keyboard s Enter key The ...

Page 290: ...r the push of a softkey After the softkey was pushed the program defined softkey label will be displayed In this mode the 4400 will highlight the next command to be performed in the Source area Step Over Executes the program line highlighted In case this line contains a GOSUB CHAIN SUB or FUNCTION call the debugger steps over it to the following line i e the program branching will be ignored In ca...

Page 291: ...es all information on numeric and string constants Operators RAPID provides you with a number of operators like sign arith metic operators comparisons or boolean operators Expressions These are combinations of variables constants function results and or operators General syntax BASIC form The RAPID programming syntax is compatible with current BASIC derivatives such as e g Quick BASIC or Visual BA...

Page 292: ...x error The interpreter always checks a program after it was started A detected syntax error causes the program to be aborted and leads to an error message indicating the erroneous program line Notation To explain the language syntax the following notation is used item Square brackets indicate an optional item which can also be omitted Example sign number is a number with an optional or sign item ...

Page 293: ...rogram line always needs to be terminated by a carriage return CR This symbol is equivalent to pushing the Enter key at the end of a program line It is not possible to show the maximum of 254 characters in one line on screen Therefore a program line may stretch out over several lines on screen To indicate that the program line is continued put a blank followed by an underscore _ and then push Ente...

Page 294: ... not available to the program chained If a variable shall be global i e it is available to all chained programs simply specify it as global The main commands dealing with variables are DIM GLOBAL VARIABLE and ERASE Arrays All RAPID variables can make up arrays of up to two dimensions The index value per dimension may range from 32 765 to 32 765 Syntax A variable name is not limited in length but o...

Page 295: ...ll lead to a result without physical unit When multiplying values only one factor may have a physical unit Constants Constants are used to store numeric or string values which need to be kept unchanged during runtime of a RAPID program Typical examples are common mathematical constants like pi the power loss factor of a cable used for testing or the type code of a mobile phone Numeric constants A ...

Page 296: ...r in the priority column the higher the priority During calculations first all operators with priority 1 are performed than all of priority 2 and so on Priorities assure that the usual sequence of operations e g multiplication and division first then addition or subtraction are performed without the need of brackets Octal O 0 7 O37721 2 to the power of 32 2 32 Hexadecimal H 0 9 A F H4AF3 2 to the ...

Page 297: ...c expressions string expressions boolean expressions 3 Addition 3 Subtraction Comparison opera tors 4 Equality 4 Inequality 4 Less 4 Greater 4 Less or equal 4 Equal or greater Boolean operators AND 5 Logical AND OR 5 Logical OR XOR 5 Logical XOR NOTE In case of an integer division or a modulo division the two operands are first converted into integer values before the operation is performed This m...

Page 298: ...ult of this expression will be a numeric value String expressions stringExp stringVar stringConst stringFct stringVar stringConst stringFct Where stringVar is a string variable stringConst is a string constant stringFct is a BASIC function that returns a string as the result Note A string expression always delivers a string Example FirstName LastName is a string expression It delivers back a strin...

Page 299: ...ever placing just a single function in a program line will lead to an error Overview Dependent on their general functions the BASIC commands of RAPID are subdi vided into six groups General commands are used to control the overall aspects of a program Typical general commands are e g CHAIN REM END WAIT or STOP Screen commands control the screen output of the 4400 They comprise CLS TEXTATTR LOCATE ...

Page 300: ...itially calling program can be used by all chained programs Subs functions and labels are global by definition and can be used by all programs i e the initially calling pro gram and all chained programs Consequently all names of subs and labels have to be unambiguous Note Subs and functions of the chained program will be ignored and not run if not explicitly called see example below CHAIN is a per...

Page 301: ...ed program TESTPROG Back again to main program Subroutine called Syntax END Parameters END does not have any parameters Description Ends the program Example IF pwr 2 2 then END In case the value of variable pwr exceeds 2 2 the pro gram will be ended immediately Syntax LET numVAR numExp stringVar stringExp Parameters numVAR is a numeric variable numExp is a numeric expression stringVar is a string ...

Page 302: ...mple REM The next line will define a vari able LET i 42 Who does not call his integers i Syntax STOP Parameters STOP does not have any parameters Description Stops the program execution but does not end the pro gram important e g to keep the values of variables when debugging a program Example If n 10 then STOP Syntax WAIT msec Parameters msec specifies the time the program will wait in milli seco...

Page 303: ... DGREY RED GREEN BLUE YELLOW MAGENTA CYAN DGREEN DCYAN DBLUE BROWN PURPLE Alternatively you may assign a code between 0 HFFFFFF This code represents an RGB model of the screen colors where the first two hexadecimal fig ures represent the red color the middle two figures the green and the last two figures the blue color The font setting is specified by the font code followed by the font size The fo...

Page 304: ...iable The signal for input finished is the CR symbol achieved by the user pushing the ENTER key The symbols entered by the user will be stored in vari able and the program will continue Notes External keyboard and the keys of the 4400 may be used in parallel This means that an entry on the external keyboard may be confirmed by pushing the 4400 s ENTER key In case variable has been defined as a num...

Page 305: ... exp TAB number or OUTPUT USING usestr exp TAB number Parameters exp is a numeric or string expression usestr defines an output format for numeric data number stands for an integer figure forcing the next exp of the same PRINT or OUTPUT command to appear on a specific position on screen Description Displays the specified expression s on screen In case the separator is a comma the expression fol lo...

Page 306: ...igned to the softkeys from left to right In case less than seven string expressions are used one or more softkeys remain without label Examples SOFTKEYS Key1 Key3 The first and third softkey from the left are labelled and may be used for INKEY or INKEYWAIT commands SOFTKEYS All softkeys remain unlabelled There are no values that could be handed over to an INKEY or INKEYWAIT com mand whatever softk...

Page 307: ...le The variable is only accessible to the program element it has been declared in This means a local variable declared in a function is not accessible by the main program and vice versa Variables that are accessible for all program elements are called global please see below for more details Note There is no need to declare local variables Within the RAPID environment all variables are interpreted...

Page 308: ...ing expres sion instructions are an optional number of program lines fnExp is an expression of the same data type as the function itself Description Declares a function FUNCTION END FUNCTION Functions are commonly used to e g calculate the result of mathematical expressions After a function has been declared it may be called by its name fnName A function call must contain all parameters in the sam...

Page 309: ...am in all programs included by CHAIN and in all related procedures and functions Any global variable is valid and accessible from the pro gram line in which it has been declared Note If a local variable has been declared or used before that carries the same name as the global variable then the global variable is not accessible Example GLOBAL strg counter declares a global string and a global numer...

Page 310: ... and passes on control to an error handling system Example The following example defines a procedure that writes the current contents of all variables into a file with a given file name SUB VarsToFile fileName LET ff FREEFILE OPEN fileName FOR OUTPUT AS ff VARIABLE ff CLOSE ff END SUB Syntax VARIABLE fileNo Parameters fileNo is a handler of an open file Description Outputs the contents of all curr...

Page 311: ...x 2 DO instructions EXIT DO instructions LOOP WHILE UNTIL boolExp Parameters boolExp is a boolean expression instructions are an optional number of program lines Description Dependent on a condition boolExp this command structure repeatedly runs a program segment Syntax 1 checks the condition before the loop is run If the condition is true in the moment the program arrives at the loop it will not ...

Page 312: ...e an optional number of program lines Description Repeats a program segment a specified number of times To do so a counter countVar is used The initial value of the counter is stated in the num Start expression while the final value is stated in the numEnd expression After each run the counter is increased by numStep If the optional STEP part is missing the counter will be incremented by 1 per run...

Page 313: ...nt sets of commands There are two different forms of this command indicated by Syntax 1 and Syntax 2 above Syntax 1 is the one line command If boolExp1 is true or a numeric value is 0 the command s following THEN will be executed If boolExp1 is false or a numeric value 0 the commands following the optional ELSE will be executed Syntax 2 is the multiline version of the command This syntax should be...

Page 314: ...several blocks of commands depending on the value of varName If varName is identical with any one of the varExp expressions the commands following that CASE state ment will be performed until the subsequent CASE or the END SELECT command is reached The program will then resume with the command following the END SELECT statement If varName is identical with several varExp only the first one found w...

Page 315: ...d returns at the next RETURN command GOTO Branches to the specified label ON ERROR Branches to the specified label if an error occurs during program execution Syntax ERROR errNo Parameters errNo is an integer number Description Creates a runtime error with the specified error number This command enables you to create your own error codes Note For the built in error codes please refer to the table ...

Page 316: ...mand follow ing the initial GOSUB command Example IF Day Friday THEN GOSUB fishDay ELSE GOSUB meatDay fishDay PRINT Today we eat fish RETURN meatDay PRINT Today we will have a steak RETURN Syntax GOTO targetLabel Parameters targetLabel is a label Description Branches to the symbolic label and continues program execution with the commands following that label Examples IF i 10 THEN GOTO loopOver loo...

Page 317: ...ing the one that caused the error Note If an error occurs within the error handling the program will be terminated There are several built in functions available for error handling Examples In the first example the 4400 prints an error message giving the error code the line in which the error occurred and the name of the related RAPID program file ON ERROR GOTO errorHandler errorHandler PRINT Erro...

Page 318: ...sult in a positive integer Software people tend to call fileNo the file handle Description Closes the file with the specified fileNo After the file has been closed fileNo is no longer related to the initial file and may be used again later to open a completely different file If fileNo is omitted then all currently open files will be closed As long as a file is closed it is not accessible for I O o...

Page 319: ...issue a subsequent INPUT command if INPUT tries to read after the end of the file was reached a runtime error will occur With the help of the INPUT command you may also prompt the user to enter data during runtime of the program Please see subsection Screen commands on page 278 for reference INPUT also reads data from the SCPI system Please refer to section SCPI and RAPID for details Example The f...

Page 320: ...erwritten without warning openMode APPEND is similar to OUTPUT However the file will not be overwritten with new data Instead new data will be added at the end of the existing file Should there be no file it will be created anew Notes When a file is already open a further OPEN command may open the same file as long as the mode is identi cal If the mode is not identical e g a file was opened for ou...

Page 321: ... is 1 32 sec states the secondary GPIB bus address The valid range is 0 64 time with the help of this parameter you may set a timeout in milliseconds eoi states whether the hardware EOI will be used parameter set to 1 or not parameter set to 0 srq a 1 states that the hardware Service Request will be used while a 0 indicates that it will not be used end specifies the end byte usually ASCII 10 or AS...

Page 322: ...red cts 1 the receiver RAPID program will always wait until all characters have been transmitted please see parameter wait Default value is 0 CTS signal will be followed time with the help of this parameter you may set a timeout in seconds When the timeout expires an empty string will be delivered to the RAPID program as input Default is 600 seconds 5 minutes end specifies the end byte usually ASC...

Page 323: ... below opens a serial interface com2 FREEFILE open com COM2 baud 9600 bits 8 stop 1 parity 1 xonoff 0 opencom opencom time 10 end 10 flush 1 wait 1 open opencom as com2 PRINT com2 Output to serial port 2 INPUT com2 incom2 CLOSE com2 Syntax PRINT fileNo USING formatstring exp TAB n BYTE m exp or OUTPUT fileNo USING formatstring exp TAB n BYTE m exp Parameters exp is a numeric or string expression f...

Page 324: ...ied file handle With the help of this command several expressions may be printed in the same line When the separator is a comma the subsequent expression will be written at the next tabulator position When the separator is a semicolon the subsequent expression will be written directly behind the previous one Notes Before PRINT may output to a file it needs to be opened for output or appending firs...

Page 325: ...meric expression into its decimal equivalent HEX Transforms a numeric expression into its hexadecimal representation OCT Converts an octal representation of a numeric expression into its decimal equivalent OCT Transforms a numeric expression into its octal represen tation VAL Converts a string expression into a numeric expression VAL Converts a numeric expression into a string expression Syntax BI...

Page 326: ... 1 to variable i j CINT 1 50 assigns 2 to variable j Syntax HEX string Parameters string is a string expression containing a valid hexa decimal representation of an integer number Description Returns the decimal representation of a hexadecimal expression contained in string The value returned will be an integer number Examples LET i HEX FF assigns 255 to variable i Syntax HEX aNumber digits Parame...

Page 327: ...mber In case aNumber is not an integer the deci mals will be truncated that means no rounding will take place When digits is stated the string will be filled up with zeros 0 to the left Examples LET a OCT 254 6 assigns 000376 to variable a Syntax VAL string Parameters string is a string expression containing a valid numeric representation of a decimal figure like 1 4 or 3E 5 Description Converts a...

Page 328: ... be no rounding If digits is omitted six decimal places will be used Examples VAL 123 returns the string 123 000000 VAL 123 456789 2 returns the string 123 45 VAL 123 456789 0 returns the string 123 Function Short description ASC Returns the ASCII code of the first character in a string CHR Returns the character representing the ASCII value of an integer number as a string INSTR Searches for the o...

Page 329: ... A to variable a Syntax INSTR startPos aString search String Parameters startPos is a numeric expression interpreted as posi tive integer aString and searchString are string expressions Description Searches aString for the first occurrence of search String The search will start at the position given by startPos or if omitted at the beginning of aString Return value is the position where searchStri...

Page 330: ...ring expression startPos and chars are numeric expressions inter preted as positive integers Description Returns chars characters of aString starting at position startPos If startPos chars is greater than the total amount of characters contained in aString the entire string starting from startPos will be returned If chars is omitted the entire string starting from startPos will be returned If star...

Page 331: ...Description Returns a string containing a total amount of chars blanks Examples d Long SPACE 1 distance will assign the string Long distance to d Function Short description CHDIR Changes the current directory CLOCK Returns the time since the system was last started CURDIR Returns the currently selected directory DATE Returns a string containing the system date DIR Function to read out the entries ...

Page 332: ...h If path is not a valid path the current directory will be kept and a runtime error will occur Example CHDIR usr new Syntax CLOCK Parameters There are no parameters Description Returns the time since the system was started last The value returned is a floating point double value expressing the time expired since the last start of the system in seconds Example t CLOCK Assigns the time since the sy...

Page 333: ...d directory one by one If there are no more entries an empty string will be returned path may either contain the absolute or relative path If path is not a valid path the returned DIR will be empty and a runtime error will occur Example The following example will print a list of all entries in the directory specified PRINT Directory entries DIR home DO d DIR IF d THEN EXIT DO PRINT d LOOP Syntax E...

Page 334: ... on the GPIB bus timeOut specifies a wait time in milliseconds During the wait time the program will be halted and will wait for the event to occur If the expected event does not occur a timeout will be generated EVENTWAIT may be used to react on any of the follow ing events KEY push of a softkey In this case the file handle returned will be 0 TIME OUT means that there was no device or task creat ...

Page 335: ...NKEY 7 THEN END PRINT Softkey OK was pushed CASE 1 INPUT 1 gpib PRINT Received on GPIB gpib EVENTSTATUS CASE SCPI INPUT scpi scpi PRINT Received from SCPI scpi CASE ELSE PRINT Any other event occurred END SELECT LOOP Syntax FREEFILE Parameters There are no parameters Description Returns the subsequent available file handle as a positive integer The returned file handle may then be used by an OPEN ...

Page 336: ...TO endProg LOOP Syntax INKEYWAIT Parameters INKEYWAIT does not have any parameters Description Halts program execution until the user pushes a softkey Notes If you want to determine the softkey pushed without halting the program choose the INKEY function instead Please assign labels to the softkeys using the SOFT KEYS command before using INKEYWAIT Otherwise the program may wait for eternity Examp...

Page 337: ...ring expres sion Description Changes the name of the file specified with oldName to newName Both oldName and newName have to be valid file names If oldName is currently open a runtime error will occur Example NAME usr new file txt AS usr new file_2 txt Syntax RMDIR path Parameters path is a valid string expression Description Deletes a directory with the path specified without prompting path may b...

Page 338: ...iles contained in a specified directory and stores them in a text file SHELL ls usr new usr new ls txt Syntax TIME Parameters There are no parameters Description Returns a string containing the system time in the fol lowing format hh mm ss where hh is a positive inte ger giving the current system hour in 24 h format mm give the current minutes and ss represent the current seconds Examples TIME wou...

Page 339: ...rameters There are no parameters Description Returns the number of the program line in which the last error occurred Example Please see example with ERR function above Syntax ERF Parameters There are no parameters Description Returns the name of the RAPID program file in which the last error occurred Examples Please see example with ERR function above Function Short description ABS Returns the abs...

Page 340: ...ription LOG returns the natural logarithm of numExp while LGT returns the common logarithm of numExp Examples i LOG 1000 j LGT 1000 Variable i will be set to 6 907755 while j will be set to 3 Syntax RND RANDOMIZE numExp Parameters numExp is a valid numeric expression interpreted as positive integer Description RND generates a random double floating point number between 0 and 1 RANDOMIZE is used to...

Page 341: ...s the tangent of numExp and delivers back a double floating point number numExp is interpreted as the radiant expression of the angle TAN 3 14 0 ATAN numExp Calculates the arcus tangent of numExp and delivers back a double floating point number numExp is interpreted as the radiant expression of the angle ATAN 3 14 1 262627 Examples Please see examples nested in the description above Syntax SQRT nu...

Page 342: ...able i will be set to 1 while variable j will be set to 1 Command or function Short description ABS Returns the absolute value of a numeric expression ASC Returns the ASCII code of the first character in a string ATAN Calculates the arcus tangent of a numeric expres sion BIN Converts a binary representation of a numeric expression into its decimal equivalent BIN Transforms a numeric expression int...

Page 343: ...n error with a specified error number EVENTWAIT EVENTSTATUS Waits for an event and returns the event code FOR NEXT Loop with a specified number of cycles FREEFILE Returns the subsequent free file handle FUNCTION Declares a function GLOBAL Declares global variables GOSUB RETURN Branches to the specified label and returns at the next RETURN command GOTO Branches to the specified label HEX Converts a...

Page 344: ... its octal rep resentation ON ERROR Branches to the specified label if an error occurs during program execution OPEN Opens a file or a port and allows for reading or writ ing data PRINT or OUT PUT Writes data to an open file or port or displays an expression on screen RANDOMIZE Initializes the random generator REM or Comment RIGHT Reads a specific part of a string starting from its end RMDIR Remov...

Page 345: ...nt The argument needs to be a valid file name of an existing file 2 Program file not found The program file was not found in the current or specified directory 3 Expression expected A numeric expression was expected but was not found 4 Variable expected A valid variable name was expected but was not found 5 String expected In a context where only a string is allowed there was no string found 6 Num...

Page 346: ...ck there must be a SELECT command 21 CASE Command Number expected When the SELECT block is used to decide on numbers the CASE statements need to be numeric as well 22 CASE Command String expected When the SELECT block is used to decide on strings the CASE statements need to be strings as well 23 CASE Command Missing END SELECT At the end of a SELECT block there must be an END SELECT statement 24 C...

Page 347: ...ge is specified with TO e g FOR i 1 TO 10 46 Chain Stack overflow The maximum depth of chained programs is 4 In case more than those 4 programs have been chained e g by a chained program that itself chains other programs this message will occur 47 Chain file not found The RAPID program file that should be chained could not be found in the current or specified directory 50 Expression NOT are not al...

Page 348: ...rflow Too many loops are interlocked Try to finish one or more of those loops before the subsequent are started 64 65 Misplaced argument The command or argument is not allowed in this context 66 Compare operand expected The program expects an operand expressing comparison 70 OPEN command FOR needs APPEND BINARI INPUT OUTPUT or RANDOM When opening a file with the FOR command option a file mode has ...

Page 349: ... an END FUNCTION for functions 85 SUB EXIT or FUNCTION EXIT does not match to header Any procedure must be exited with EXIT SUB Any function must be exited with EXIT FUNCTION 86 SUB END or FUNCTION END missing The last program line of any procedure or function must be either an END SUB for procedures or an END FUNCTION for functions 89 Too many arguments More arguments than expected were used 97 I...

Page 350: ...rogram internal error hand ling To completely avoid this problem it is recommended to check the operands of a division before the division is carried out 105 106 Index out of range The index of an indexed variable must be in the range of 32 766 to 32 766 107 ON ERROR not allowed in an error handling routine Within program internal error handling an ONERROR command is not allowed 109 Dimension Erro...

Page 351: ...ed Read Only 119 A component of Path is not a directory The path specified or parts of it do not fulfill the nam ing conventions for directories Please remember that a directory name must not contain any symbols and is restricted to a maximum length of 8 characters 120 Directory busy The directory specified is currently in use by another task and cannot be accessed 121 Directory not empty You trie...

Page 352: ...transmit data over the serial ports before the time limit expired This may be due to faulty configuration either hardware or software of the hand shake signals Please also check whether all parameters used in the OPEN COMx command are correct 199 USER BREAK The program was terminated by the user 201 Widget Error Pos and Size must be defined All new widgets need to carry a definition of their posit...

Page 353: ...400 Test results described in this chapter are as follows Overview on page 330 What SCPI is on page 330 Structure on page 331 Syntax and notation on page 331 SCPI and RAPID on page 335 Command subsystem overview on page 342 The BS and MS parameter subsystems on page 352 The communication related subsystems on page 344 SCPI command errors on page 371 ...

Page 354: ... into which the SCPI commands are split The BS and MS parameter subsystems The communication related subsystems SCPI command errors Here you will find a table with explanations of syntax errors run time errors device errors or any other errors What SCPI is SCPI Standard Commands for Programmable Instruments was introduced in 1990 It is a world wide standard independent of single manufacturers The ...

Page 355: ... and purpose SCPI uses a device independent command set the so called Common commands understood by all SCPI devices The 4400 specific SCPI commands are called Compound commands and will only be understood by the 4400 and its subsystems A subsystem in terms of SCPI is quite abstract it is the set of commands imple mented to perform specific tasks of the SCPI device the measurement subsystem of the...

Page 356: ...d of RFGen erator Throughout this manual the short form is always written in capitals to make it easy to identify it However the SCPI system of the 4400 is not case sensitive Examples The complete SCPI command to set the base station color code i e the training sequence to 5 would be CONFigure GSM BS ID BCC 5 The short form CONF GSM BS ID BCC 5 is completely identical RFGenerator STATe ON is ident...

Page 357: ...tion marks Example CONFigure GSM TYPE GSM9001800 sets the 4400 to work as test set for GSM 900 1800 String parameters are user defined strings Example PROGram NAME rapid examples ms_test rbm loads the specified RAPID program file Block parameters are a special case and will be described with the related commands Queries Many commands also have a query form These queries enable you to read out the ...

Page 358: ... does not exist with RAPID Pointed brackets indicate that either a parameter or a subcommand must be used in order to build a valid command Example RFGenerator STATe ON OFF The RF generator can be set either on or off item usage different to RAPID Braces stand for a parameter or a subcommand that has to be selected from a predefined table Example MEASure measProp indicates all subcommands of the M...

Page 359: ... commands like PRINT or INPUT are used Example 1 This example opens the SCPI system as a communication port LET scpi FREEFILE OPEN scpi as scpi CLOSE scpi Example 2 After the SCPI system has been opened as a communication port commands may be sent using the PRINT or OUTPUT command PRINT scpi RST OUTPUT scpi CONFigure GSM TYPE GSM9001800 PRINT scpi MEASure GSM RFTX ALL PRINT scpi FETCh GSM RFTX ALL...

Page 360: ...ere will be no automated reaction to any GPIB control sequences However please note that measurement results polled through GPIB commands will also be available for any RAPID program To make sure that the 4400 is not blocked by other tasks only perform RAPID or SCPI measurements from the Welcome menu In order to prevent the 4400 from waiting for eternity use a standard timeout of 10 s allow more t...

Page 361: ... burst length and returns the related value OUTPUT scpi MEASure RFTX LENGth INPUT scpi burstlength Example 2 More than one query can be placed into a single command line The individual queries must be separated by semicolons The returned values will also be separated by semicolons The example below reads out the current system time and then queries the contents of the event status register OUTPUT ...

Page 362: ...ogramming of the event handling system is described in detail in subsec tion Understanding the STATus subsystem on page 345 The use of the service register is outlined in subsection At the top the service register on page 347 The scheme to use the registers for communication between a RAPID program or the GPIB on one side and the 4400 on the other side always follows the following principles Secti...

Page 363: ... as scpi Configuring the measurements as above as a group and starting a group measurement PRINT scpi CONFigure MEASure GROup RFTX PRMS FREQuency POWer TEMPlate PRINT scpi MEASure RFTX GROup Read out the result string INPUT scpi result Read out the service register to check if there was some error PRINT scpi PROG STB INPUT scpi A A BIN VAL A 8 Select reaction on event occurred IF MID A 2 1 1 THEN ...

Page 364: ...e FAIL_EXIT PRINT An error did occur during measurements Err Ending the program OKAY_EXIT END Message exchange This example demonstrates a message exchange between a RAPID program and an external control computer connected on the GPIB The message exchange is triggered by events via the SYSTem MESSage and the PROGram MESSage queue Although not complete the example below illustrates the principle FI...

Page 365: ...XAlign Message CASE SP result DoSPAlign Message CASE AN result DoAFANAlign Message CASE ELSE result END SELECT IF result THEN PRINT 0 SYST MESS result LOOP Example of a GPIB protocol to from 4400 Data Comment to PROG NAME MSG DEMO RBS Load program to PROG STAT RUN Start program on 4400 to PROG MESS TX 1 62 124 105 Start user programmed TX cali bration process on 4400 from SRQ 4400 raises service r...

Page 366: ... Please note that any SCPI command specified with an invalid of without an argument required will be totally ignored by the system This means that an incomplete SCPI command will not affect the current system status at all Schematic view of the subsystems of the 4400 This is a very simplified schematic view of the control and data flow inside the 4400 serial poll Controller identifies SRQ device t...

Page 367: ...SE Sets and queries the event status register mask Event status register ESR Reads out the current con tents of the event status register Event status register IDN Returns device identity General common commands OPC Waits until previous com mand has been completed General common commands RST Resets the entire test set All parameters limits etc will be set to internally predefined default values Ge...

Page 368: ...m subsystem System parameters such as the number of unread error messages the test set s GPIB address etc may be read out or set using the commands of this subsystem The STATus subsystem The STATus subsystem delivers detailed information about the internal status of the 4400 its error conditions and special events These three areas are dealt with in three different sections of the status subsystem...

Page 369: ... specific conditions and single parameters while higher level registers integrate the result of several lower level registers and thus provide a more general view The highest level of these registers is the service register sometimes also referred to as the statusbyte register or status byte The figure below gives an example of a group of registers A group of registers starts with a Condition regi...

Page 370: ... related event type register Event type registers are read only and self destructive They will be cleared after any query Transition of a bit from the condition type to the event type register How will a bit find its way to the Event register This depends on the transition filter and its settings The transition filter works as follows First there are two branches the Positive TRansition and the Ne...

Page 371: ...le filter is user definable using the STAT xxxx ENABle commands and again contains as many bit positions as the condition type register Again the Enable filter mask is ANDed with the Event register and a nonzero result will finally set the Result bit This Result bit may be a summary bit either in a higher level register or in the service register Summary 3 raising the Result bit The event type reg...

Page 372: ...ils regarding the event status register please refer to the appendix SCPI Command Reference General operation register group This group of registers is 16 bits wide and reflects the general operation status of the 4400 Some of the bits of this register like bits 8 and 9 are summary bits Those summary bits are result bits of subordinate groups of registers as described below NOTE The commands relat...

Page 373: ...of registers is 16 bits wide Its main task is to deal with events related to the measurement status The Result bit of this group of registers is forwarded to bit 9 of the general oper ation register group 10 1024 Not in use 11 2048 Not in use 12 4096 Not in use 13 8192 Instrument 14 16384 Not in use 15 32768 Not in use Bit Decimal Meaning 0 1 Set while RFTX measurements are in progress 1 2 Set whi...

Page 374: ...egister group and its subordinate groups of registers all start with STATus QUEStionable Bit Decimal Meaning 0 1 Voltage out of range Not used on the 4400 1 2 Current out of range Not used on the 4400 2 4 Time out of range Not used on the 4400 3 8 Power out of range Not used on the 4400 4 16 Temperature out of range Not used on the 4400 5 32 Frequency out of range Not used on the 4400 6 64 Phase o...

Page 375: ...roup The PROGram subsystem overview This subsystem contains commands related to loading and executing RAPID program files The FORMat subsystem overview The FORMat subsystem sets and queries settings concerning the data output in remote mode Bit Decimal Meaning 0 1 Input overload Reduce RF power immediately to avoid possible damage of the 4400 s highly sensi tive input stages 1 2 Output level out o...

Page 376: ... 4400 and the mobile under test The CONFigure subsystem This subsystem incorporates all changeable BS parameters of all systems imple mented The key commands are the following NOTE The settings made here directly affect all communication system specific sub systems CONFigure CSYStem Selects the communications system to work with CONFigure SystemOption These commands select parameters within a comm...

Page 377: ...em All kinds of statistic evaluations and checks of measurement results against predefined limits The MEASure subsystem The MEASure subsystem is probably the most important SCPI command subsystem of the 4400 There you will find all commands to acquire measure ment results of the mobile under test Measurements can be taken as one shot measurements or as series of measure ments NOTE FETCh requires t...

Page 378: ...nt state of the 4400 In case the 4400 is in a state that does not allow a specific measurement command to be performed or completed an error message will be added to the 4400 s internal error queue The related flag in The STATus subsystem will be set too In case this is the first error message to appear within the error queue the error indicator bit of the service register bit 2 will be set as wel...

Page 379: ...d the FETC subsystems Starting a measurement that takes some time to deliver a measurement result back e g the BER measurement After the measurement has been started with the MEAS command the test set is free to perform other tasks If in this case the query form of the MEAS command is used the test set is blocked until a measurement result is available Sometimes measurement results will need to sw...

Page 380: ...med the measure ment will be stopped and no further measurement result values will be stored Examples MEASure GSM CONTinuous RFTX PPEAk and MEASure GSM RFTX PPEAk are identical Either command will start the measurement of the peak phase error The latest result of this measurement like 5 84 will be stored internally It will be overwritten as soon as a new measurement result has been achieved To rea...

Page 381: ...e will be added to the 4400 s internal error queue for further details refer to section MEASure CONTinuous on page 354 Query The query form of any MEAS ARR command will start the related measurement the specified number of times After the number of measurements specified have been performed the measurement will be stopped The query will then return a string containing all the measurement results T...

Page 382: ...measurement of the mobile s burst The corresponding result string to be read out either with the query form of the command or with FETCh BLOCkdata BURStshape will contain 711 floating point real numbers representing the measurement result values The numbers will only have one digit behind the dot The single measurement result values are separated by commas The meaning of the single values within t...

Page 383: ...be read out either with the query form of the command or with FETCh BLOCkdata MSPectrum will contain floating point real numbers representing the measurement result values The single measure ment result values are separated by commas The number of the measurement result values returned is dependent on the span and resolution set with the commands RFSPectrum MSPectrum SPAN and RFSPectrum MSPectrum ...

Page 384: ...esults if the Audio Option has been installed Syntax CONFigure MEASure GROup RFTX RFTXprop MEASure CONTinuous RFTX GROup or MEASure ARRay RFTX GROup or CONFigure MEASure GROup AFANalyser AFANprop MEASure CONTinuous AFANalyser GROup or MEASure ARRay AFANalyser GROup Parameters RFTXprop is one or more of the single RFTX measurements PPEAk PRMS FREQuency LENGth UTIMe POWer TEMPlate CORNer FLATness AF...

Page 385: ... obtained will be handed back and the internal result register will be cleared afterwards Consequently a subsequent FETCh command will lead to a timeout as above The following timeouts have been implemented 5 s for all RFTX measurements 30 s for all RFRX measurements 10 s for all RFSPectrum measurements 10 s for all AF measurements There are two versions of a FETCh command The FETCh LAST command w...

Page 386: ... with measProp Syntax FETCh LAST Description Returns a string containing the latest measurement result s for the MEASure com mand issued last Format and number of the measurement result values contained in the string are depending on the preceding MEASure command Examples MEASure GSM RFTX PPEAk FETCh LAST will return the latest result e g 5 84 MEASure GSM ARRay RFTX PPEAk 5 FETCh LAST will return ...

Page 387: ...MEASure command was not terminated by another MEASure command MEASure GSM ARRay RFTX PPEAk 10 This command will start the measurement of the peak phase error As soon as 10 measurement results have been obtained the measurements will be stopped To read out the 10 measurement results use the FETCh GSM RFTX PPEAk The string delivered back contains the 10 measurement results starting from the first on...

Page 388: ...rt of the subsystem will be checked against the corresponding limits This cumulative check is reset as well in the example shown above with the CALCulate LIMit FAIL CUMulative RESet command For further details check with section CALCulate LIMit on page 365 Then two measurements are started in this example commands MEASure ARRay RFTX LENGth 10 and MEASure ARRay RFTX PRMS 10 As soon as the measureme...

Page 389: ...d or 1 in case at least one limit was violated by the latest measurement result value Description Checks whether the latest measurement result value of the measurement started last is within its limits Examples MEAS GSM ARR RFTX LENG MEAS GSM ARR RFTX PRMS CALC GSM LIM FAIL LAST This command of the CALCulate subsystem will check whether the latest measure ment result value of the PRMS measurement ...

Page 390: ... Example MEAS GSM ARR RFTX LENG 10 MEAS GSM ARR RFTX PRMS 10 CALC GSM LIM FAIL CUM This command of the CALCulate subsystem will check whether all measurement result values of the PRMS measurement are within their limits Syntax CALCulate LIMit FAIL CUMulative RESet Description Resets clears the cumulative check of measurement result values against their lim its Only the measurement results from MEA...

Page 391: ...ation of the lower limit Example CALC AFAN SIN LIM LOW 25 5 This command sets the minimum SINAD required in order to pass the test to 25 5 Any measurement result value falling below this limit e g 25 4 will result in a viola tion of the limits of the RMS valued phase error measurement NOTE The commands described in this section will be reset with any new MEASure command Therefore the commands desc...

Page 392: ...ose complex limits in subsection Working with complex limits on page 369 Examples CALCulate GSM RFTX PRMS LIMit UPPer DATa 4 00 Sets the upper limit of the RMS phase error to 4 00 CALC GSM RFTX PPEA LIM UPP Queries the currently set upper result limit for the peak phase error The value will be returend as floating in the result string like 6 35 Syntax CALCulate measProp LIMit FAIL Returns A boolea...

Page 393: ... points The corner points are a maximum of eight positions to check critical parts of the burst For each position a minumum and a maximum RF power level may be specified Positions are specified in microseconds in relation to the beginning of the burst i e the first bit of the useful part minimum and maximum RF power levels are specified in dB c in relation to the nominal output power level of the ...

Page 394: ...f the RF gener ator such as RF level frequency etc RFANalyser This subsystem gives access to the setup parameters of the RF Analyser such as frequency or trigger mode RFSPectrum The commands of this subsystem are used to set span and resolu tion of the RF spectrum analyser AF measurement devices AFGenerator The audio frequency generator provides signals for audio measurements The AFGenerator subsy...

Page 395: ...ignals use the CONFigure CSYStem GPGenana command instead In this mode a base channel can be provided see command RFG GSM MOD CHAN for details The RFANalyser subsystem The RFAN subsystem controls the accessible parameters of the RF analyzer The RFSPectrum subsystem The RFSP subsystem controls the accessible parameters of the RF modulation spectrum analyzer The AFGenerator subsystem The AFG subsyst...

Page 396: ...e GPIB system 70 QNX proxy error 71 Process coordination error 72 Message sent to the GPIB system is not understood there 75 Error within the error message system 78 Language expression invalid 80 Name attachment error 81 Proxy attachment error 82 Proxy detach error 83 Timer attachment error 85 Timer delete error 86 Parameter can not be set 87 INI file error 88 The file selected was not found 89 D...

Page 397: ...ncy is not within the ranges specified 203 External synchronization changed during remote operation 204 The operation is not possible in the current state of the 4400 221 Settings of the 4400 lead to a conflict 222 Data out of range 225 No communication system running 226 Timeout occurred while waiting for an uplink message to arrive from the mobile 227 Layers 2 3 failed Communication could not be...

Page 398: ...k error 375 Error in burst data encountered 376 ACPM receive error 377 Autotemplate error 378 Setting value for modulation spectrum out of range 399 Invalid error code 401 General CDMA measurement error Invalid return code for sample acquisition 402 CDMA Measurement error Signal level too high for current input attenuation 403 CDMA Measurement error Signal level dropped below valid level during ac...

Page 399: ... page 376 Signaling operation register group on page 376 Common commands on page 376 SYSTem subsystem on page 381 STATus subsystem on page 389 FORMat subsystem on page 409 CONFigure subsystem on page 411 CALL subsystem on page 449 CALL subsystem on page 449 MEASure subsystem on page 461 FETCh Subsystem on page 578 CALCulate Subsystem on page 610 RFANalyser subsystem on page 787 RFSPectrum subsyste...

Page 400: ...of this group of registers is forwarded to bit 8 of the general oper ation register group Common commands The common commands are understood by all SCPI and IEEE 488 2 instruments Their purpose is to perform general tasks and to read or work with the registers common to all SCPI instruments The following common commands have been implemented General common commands CLS IDN Syntax CLS Parameters Th...

Page 401: ...ates This does not preclude any name changes at Willtek but rather applies to instrumentation in general Example WILLTEK 4400 0511099 3 10 0001 Syntax OPC Parameters There are no parameters Description Postpones the execution of a command until all commands issued previously have been completed Query Returns the operation complete flag in a string A 1 indicates that all commands have been complete...

Page 402: ...filter mask of the event status register int1 is the decimal representation of the binary mask The mask and the current content of the event status register will be ANDed If the result is not zero then bit 5 of the Service register will be set Query The query form reads out the enable filter mask currently set and returns its binary representation in a string Example ESE 128 As soon as power has b...

Page 403: ... related command is SRE see below for details 5 32 Event status summary When this bit is set an event within the Event status register group e g an error occurred passed all filters 4 16 Message available This bit will be set to 1 as soon as a query has been completed and measurement result s are available 3 8 QUESTionable status summary If this bit is set an event within the General questionable ...

Page 404: ...IB Query The query form reads out the mask currently set and returns its binary representation in a string Example SRE 68 As soon as an error occurs bits 2 and 6 of the service register will be set ANDed with the mask 68 a binary 1 will be the result and a SRQ will occur on the GPIB Syntax STB Parameters There are no parameters Description There is only a query form of this command available Query...

Page 405: ...errors Example SYSTem ERRor NEXT String returned 66 GPIB cannot be initialised Syntax SYSTem ERRor COUNt Parameters There are no parameters Description There is solely a query form of this command available Query Returns the number of unread error messages in the internal error queue of the Willtek 4400 The string returned will contain one integer The maximum number of errors stored internally is ...

Page 406: ...ERRor REMote DISPlay PredefExp Parameters PredefExp is one of the following predefined expressions OFF ON Default is OFF Description Switches the error display on the start screen on and off If it is switched to ON the error log will be displayed after the first error occurred Query Reads and returns the current setting Example SYST ERR REM DISP ON In remote case the error log window will be displ...

Page 407: ...default value is 1 int1 must be specified while int2 is an optional parameter Description Sets the GPIB address of the Willtek 4400 For details regarding the GPIB address refer to section Setting the GPIB address Query Reads and returns the current setting of the GPIB address as explained above Example SYST COMM GPIB ADDR 14 Sets the GPIB address to 14 Syntax SYSTem COMMunicate GPIB TERMinator Pre...

Page 408: ... only containing the default gateway address for the 4400 Description This command sets the default gateway address of the 4400 See section I O Configu ration for more details Query Reads and returns the current setting of the gateway address as explained above Example SYST COMM TCP GAT 192 16 16 1 sets the gateway address to a defined value Syntax SYSTem COMMunicate TCPip PORT int Parameters int ...

Page 409: ...n I O Configuration for more details Query Reads and returns the last settings for the mount path and the corresponding local name as explained above Example SYST COMM TCP MOUNt unixpc disk2 results resdir Syntax SYSTem COMMunicate TCPip DHCP PredefExp Parameters PredefExp can take on one of the following values ON or OFF The default is OFF Description The command turns DHCP on or off See section ...

Page 410: ...trol of the 4400 via the serial interface port COM 1 Note The remote control capability at COM 1 should be disabled prior to controlling external equipment e g the Bluetooth Connectivity Test products through this inter face Query Returns the current setting Example SYST COMM SERA REM OFF SYST COMM SERA REM Returns the following string OFF Syntax SYSTem COMMunicate SERA BAUD int1 Parameters int1 i...

Page 411: ...jj stands for the four digits of the year int1 mm gives the two digits of the current month int2 and dd represents the day of the current month int3 Query Reads and returns the current system date in a string using the format explained above Example SYST DATE 2001 7 6 Sets the system date to the 6th of July 2001 Syntax SYSTem TIME int1 int2 int3 Parameters intx are three integers The minimum value...

Page 412: ...EPC1 EPC3 BMPF CANO Default is HP400 Description Selects the printer for screen dumps The printers selectable are HP400 means the Hewlett Packard HP deskjet 400 series HP680 stands for the DP deskjet 680 series EPST means the Epson EP stylus series HPLJ stands for the HP laserjet series EPSP EPSX EPSI EPCI EPS1 EPPX EPC1 EPC2 EPC3 EPC4 EPC5 EPC6 and EPC8 stand for the corresponding Epson printer s...

Page 413: ...on page 345 Syntax STATus PRESet Parameters There are no parameters Description This command sets all user definable settings of the status subsystem to their factory default values The default values for the single commands are explained below Query There is no query form of this command available Example STATus PRESet Will reset all parameters of the status subsystem to their default values as l...

Page 414: ... OPERation EVENt Value returned 32 This means that bit 5 the waiting for a trigger bit has been set This indicates that a waiting for a trigger event did occur If you want to know whether the Willtek 4400 is still waiting for the trigger to occur read out the related condition type reg ister see command explained below Syntax STATus OPERation CONDition Parameters There are no parameters Descriptio...

Page 415: ...ice register Syntax STATus OPERation NTRansition int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 32767 The default value is 0 Description Sets the NTR mask of the General operation register group This mask will be ANDed with the up to 15 bits of the NTR transition filter of the general operation condition register to allow a reset negative transition of any ...

Page 416: ...tring containing one integer The value returned represents all signaling operation events that have occurred since the last query of this register As with any event type register the single bits will remain set even when the reason for the bits to be set is no longer valid Please note that this is the main difference between event type and condition type registers Condition type registers reflect ...

Page 417: ...g GSM CONDition Value returned 512 This means that bit 9 has been set and that there is a change of the call channel cur rently in progress Bit 9 will be reset as soon as the change of the call channel has been completed For details on return data bits and decimals and their meaning refer to section STATus OPERation SIGNalling GSM EVENt on page 392 Syntax STATus OPERation SIGNalling GSM ENABLe int...

Page 418: ...alling GSM NTRansition int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 32767 The default value is 0 Description Sets the NTR mask of the Signaling operation register group This mask will be ANDed with the up to 15 bits of the NTR filter of the signaling operation condition register to allow a reset negative transition of any bit i e a transition from logic 1...

Page 419: ... example 5 This means that bits 0 and 2 of the GPRS signaling operation event register have been set The mobile is GPRS Attached and the PDTCH is set up so the Willtek 4400 is ready to take measurements Syntax STAT OPERation SIGNalling EGPRs CONDition Parameters There are no parameters Description This command reads out the current contents of the GPRS Signaling Operation Condi tion Register This ...

Page 420: ...its of the PTR filter of the GPRS signaling operation condi tion register to allow a positive transition of any bit i e a transition from logic 0 to 1 to reach the signaling operation event register Note The default of this mask is 32767 that means that the mask will allow any positive transition of the lower 15 bits of the condition type register to reach the event type register Query There is no...

Page 421: ...ion type registers will be updated continuously The bits of the signaling operation event register have the following meaning Bit 0 decimal 1 Disabled set when EVDO mode is disabled Bit 1 decimal 2 Control channel set when the EVDO mode is on a control channel Bit 2 decimal 4 Session open set when a terminal has opened a session Bit 3 decimal 8 Connected set when a connection has been established ...

Page 422: ...Syntax STATus OPERation SIGNalling EVDO ENABLe int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 32767 The value default is 0 Description This command sets the enable filter of the signaling operation register group This mask will be ANDed with the signaling operation event register and thus decide what kind of events will be forwarded to bit 8 of the general ...

Page 423: ...Ransition 0 This means that none of the negative transitions of the condition type register will be forwarded to the event type register Syntax STATus OPERation MEASuring EVENt Parameters There are no parameters Description Reads out the current contents of the measuring operation event register Note Event type registers are read only and self destructive They will be cleared after any query Query...

Page 424: ...ents have been com pleted Syntax STATus OPERation MEASuring ENABLe int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 32767 The default value is 0 Description This command sets the enable filter of the Measuring operation register group This mask will be ANDed with the measuring operation event register and thus decide what kind of events will be forwarded to b...

Page 425: ...nt type register Syntax STATus QUEStionable EVENt Parameters There are no parameters Description Reads out the current contents of the general questionable status event register Note Event type registers are read only and self destructive They will be cleared after any query Query There is only a query form of this command available The query will return a string containing one integer The value r...

Page 426: ... the MSB of this register is not used Therefore the maximum value returned will be 32767 Example STATus QUEStionable CONDition Value returned 512 This means that bit 9 the RF summary bit has been set indicating a current problem on the RF side of the Willtek 4400 Syntax STATus QUEStionable ENABLe int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 32767 The defa...

Page 427: ...ionable NTRansition int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 32767 The default value is 0 Description Sets the NTR mask of the General questionable status register group This mask will be ANDed with the up to 16 bits of the NTR filter of the general questionable status condition register to allow a reset negative transition of any bit i e a transition...

Page 428: ...d below Syntax STATus QUEStionable RF CONDition Parameters There are no parameters Description This command reads out the current contents of the RF questionable status condition register This register reflects the current questionable state of the Willtek 4400 regarding RF and will be updated continuously Note This register is nondestructive This means that it will keep its contents after any que...

Page 429: ...wer 15 bits of the condition type register to reach the event type register of this group Query There is no query form of this command available Example STATus QUEStionable RF PTRansition 0 This means that none of the positive transitions of the condition type register will be forwarded to the event type register Syntax STATus QUEStionable RF NTRansition int1 Parameters int1 is an integer The mini...

Page 430: ... event type register Example STATus QUEStionable SYNChron EVENt Value returned 2 This means that bit 2 has been set indicating that an external frame synchronization signal has been recognized on the SYNC IN OUT socket on the rear panel of the Willtek 4400 Syntax STAT QUEStionable SYNChron CONDition Parameters There are no parameters Description This command reads out the current contents of the s...

Page 431: ...d with the up to 16 bits of the PTR filter of the synchronization questionable status condition register to allow a positive transition of any bit i e a transition from logic 0 to 1 to reach the synchronization questionable status event register Note The default of this mask is 32767 that means that the mask will allow any positive transition of the lower 15 bits of the condition type register to ...

Page 432: ... 4460 GSM System Option and 4468 EDGE System Option Version 12 20 Example STATus QUEStionable SYNChron NTRansition 0 This means that none of the negative transitions of the condition type register will be forwarded to the event type register of this group ...

Page 433: ...register QUEStionable stands for the current contents of the general questionable status condition register ALL will deliver the current contents of the eight most important registers The order is as follows 1 Service register 2 event status register 3 general operation condition register 4 signaling operation condition register 5 measuring operation condition register 6 general questionable statu...

Page 434: ...edefExp Parameters PredefExp is one of the following predefined expressions COMMa COLOn SEMIcolon Default is COMMa Description Selects the delimiter to be used to separate parameters on commands and single measurement result values COMMa stands for commas default COLOn sets the delimiter to be a colon while SEMIcolon will use and expect a semicolon to be used Query There is no query form of this c...

Page 435: ...emOption MSTAtion The mobile specific information is handed over to the 4400 using these commands One example is the power level CONFigure SystemOption BER These commands set the BER parame ters CONFigure SystemOption GROup With the help of these commands groups of measurements may be defined CONFigure COUPloss These commands provide access to the coupling loss compensation fea ture of the 4400 NO...

Page 436: ...et for circuit switched GSM systems including multislot HSCSD All tests performed with this setting require a call setup Therefore this test mode is called the call mode GPRS will bring the Willtek 4400 into call mode for standard GSM and GPRS sys tems This means that this parameter will enable testing of all kinds of GSM signals circuit switched signals in single or multislot mode as well as pack...

Page 437: ... PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is OFF Description Turns multislot operation either on or off OFF means that standard GSM is active and all multislot functions are disabled Note HSCSD or multislot testing requires the Multislot Option to be installed on your Willtek 4400 Query The query form of this command will return the current setti...

Page 438: ... of real1 is dBm Query The query form of this command will return the current RF output power setting of the Willtek 4400 The string delivered back will contain one real number Example CONFigure GSM BS LEVel 50 5 CONF GSM BS LEV Value returned 50 5 Syntax CONFigure GSM BS CMODe PredefExp Parameters PredefExp is one of the following predefined expressions FACCh SDCCh Description sets the mode of ca...

Page 439: ...e returned 20 Syntax CONFigure GSM BS LAI MNC FORM PredefExp Parameters PredefExp is one of the following predefined expressions TWODig its THREedigits Default is TWODigits Description This command sets the format of the mobile network code Query The query form of this command will return the current setting The string delivered back will contain one of the predefined expressions as explained abov...

Page 440: ...is 0 Description This command sets the base station color code For details please refer to section Basic System Parameters Query The query form of this command will return the current setting The string delivered back will contain one integer Example CONFigure GSM BS BCC 1 CONF GSM BS BCC Value returned 1 Syntax CONFigure GSM BS PUIT int1 Parameters int1 is an integer The minimum value for int1 is...

Page 441: ...lt value for int1 is 45 Description This command sets the traffic channel TCH number to be used For details please refer to section Test Parameters Query The query form of this command will return the current setting The string delivered back will contain one integer Example CONFigure GSM BS TCH ARFCn 917 CONF GSM BS TCH ARFC Value returned 917 Syntax CONFigure GSM BS TCH TSLot int1 Parameters int...

Page 442: ...ort Notes All six integer values are optional If the command is sent without any channel number specified the default values 0 will be broadcast by the Willtek 4400 in the system information message Let s assume that there was a first command sent with six channel numbers spec ified After that a second command is sent with only two channel numbers spec ified Now the Willtek 4400 will alter only th...

Page 443: ...CONF GSM BS CBA Value returned 1 Syntax CONFigure GSM BS MSLot DATA int1 Parameters int1 is an integer The minimum value for int1 is 1 the maximum value is 4 The default value for int1 is 2 Description This command sets the number of time slots to be transmitted by the Willtek 4400 during multislot operation Note HSCSD or multislot testing requires the Multislot Option to be installed on your Will...

Page 444: ...vidual levels specified with the CONF GSM BS MSL LEV command will be used STDLev means that the individual RF power levels will be ignored and that the standard RF output level of the Willtek 4400 as set with the CONF GSM BS LEV command will be used Note For a detailed explanation of the individual power levels in conjunction with the multislot measurement capabilities of the Willtek 4400 HSCSD pl...

Page 445: ...lead to a DRX period of two multiframes Query The query form of this command will return the current setting The string delivered back will contain one integer Example CONFigure GSM MSTAtion DRX 2 CONF GSM MSTA DRX Value returned 2 resulting in a DRX period of four multiframes Syntax CONFigure GSM MSTAtion TADVance int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum valu...

Page 446: ...re two standard signaling channels in GSM SDCCH and FACCH The FACCH is always associated with a traffic channel However some mobiles will only listen to signaling provided on the SDCCH For details please check with section Basic System Parameters Query The query form of this command will return the current setting The string delivered back will contain the short form version of one of the predefin...

Page 447: ...xpressions explained above Example CONFigure GSM BER LOOP RESidual CONF GSM BER LOOP Value returned RES Syntax CONFigure GSM BER BITPattern PredefExp Parameters PredefExp is one of the following predefined expressions PRBS9 PRBS15 PRBS23 ALLZero ALLOne ONEZero ZEROone Default is PRBS9 Description This command selects the test bit sequence to be used for the BER measurements PRBS9 stands for a pseu...

Page 448: ...r int1 is 0 Description This command allows to predefine a round trip delay in order to achieve a fast syn chronization Note During BER testing there will be a delay between the reception of the first burst of a particular voice block at the mobile and the transmission of the first burst of the same voice block after decoding and coding on the uplink This delay is called the round trip delay Query...

Page 449: ...account POWer is the mobile s RF output power level in dBm TEMPlate indicates whether the power time template has been violated by a burst or not CORNER gives the RF power level in dBm at eight predefined positions of a burst see section Corner Points for details FLATness gives an indication whether the mobile s RF output power is constant during the useful part of the burst Notes This command mus...

Page 450: ...this measurement gives the root mean spare voltage of the AC component of the applied DC signal Notes This command must be used with at least one parameter specified All other parameters are optional Unless organized in this sequence the start of a new AF test will always termi nate the preceding one instantly Therefore this command is an efficient way to perform several AF measurements in a seque...

Page 451: ...ccessories for details Further details regarding the tests can be found in section MEASure subsystem on page 461 Query The query form of this command will return the current sequence of power supply tests to be performed by the Willtek 4400 The string delivered back will contain a maximum of three short form versions of the predefined expressions explained above Example CONFigure MEASure GROUp PSU...

Page 452: ...are used to compensate e g losses in cables For more details please refer to section Coupling Loss Query The query form of this command will return the current setting The string delivered back will contain one predefined expression as explained above Example CONFigure COUPloss STATe ON CONF COUP STAT Value returned ON Syntax CONFigure COUPloss NAME string1 Parameters string1 is as string giving t...

Page 453: ...s data The maximum length of string1 is 255 characters realfx are floating point real numbers giving frequencies in MHz while realax are floating point real numbers giving the corresponding coupling loss in dB All realfx have to be within two frequency ranges The lower frequency range is from 800 0 MHz to 1000 0 MHz the higher frequency range is from 1700 0 MHz to 2000 0 MHz The minimum resolution...

Page 454: ...hich the mobile under test is going to transmit The phys ical dimension of int1 is dBm Note Specifying an expected power level in analyzer mode speeds up testing as it avoids or shortens auto ranging and auto triggering procedures Query The query form of this command will return the current setting The string delivered back will contain one integer Example CONFigure EGPRs ANALyzer LEVel EXPect DAT...

Page 455: ...t value for int1 is 0 Description This command sets the routing area code This code is used to indicate the routing area the base station belongs to This parameter is broadcast by the Willtek 4400 in the SI13 rest octets Query The query form of this command will return the current setting The string delivered back will contain one integer Example CONFigure EGPRs BS RC0 124 CONF EGPRs BS RCO Value ...

Page 456: ...in one integer Example CONFigure EGPRs BS RLCMac USF 0 CONF EGPRs BS RLCM USF Value returned in this example 0 Syntax CONFigure EGPRs BS RLCMac USF INC PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description Switches the auto incrementing of the USF either ON or OFF For further details regarding the USF please refer to the description of the C...

Page 457: ...g The string delivered back will contain one of the predefined expressions explained above Example CONFigure EGPRs BS RLCMac RRBP MODE OFF CONF EGPRs BS RLCM RRBP MODE Value returned in this example OFF Syntax CONFigure EGPRs BS RLCMac PR PredefExp1 Parameters PredefExp1 is one of the following predefined expressions RNG6 RNG14 RNG22 RNG30 Default is RNG6 Description This command specifies the pow...

Page 458: ...or int1 is 0 Description This command sets the block sequence number BSN in asynchronous generator analyzer mode please refer to the description of the CONF CSYS GPG command for further information The BSN is the absolute block sequence number modulo 128 of each RLC data block within the TBF It is used to enumerate the RLC data blocks starting with 1 Query The query form of this command will retur...

Page 459: ...expressions as explained above Example CONFigure EGPRs BS ATTach OFF CONF GSM BS ATT Value returned in this example OFF Syntax CONFigure EGPRs BS MSTAtion MSLot int1 Parameters int1 is an integer parameter The minimum value for int1 is 1 the maximum value is 4 The default value for int1 is 1 Description This command either sets the number of UL time slots expected by the Willtek 4400 asynchronous ...

Page 460: ...ng The string delivered back will contain one integer Example CONFigure EGPRs BS BCH ARFCn 60 CONF EGPRs BS BCH ARFC Value returned in this example 60 Syntax CONFigure EGPRs BS CBA int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 1 The default value for int1 is 0 Description This command sets the cell barred access parameter A 0 set for the CBA will allow the...

Page 461: ...S LAI MCC 238 CONF EGPRs BS LAI MCC Value returned in this example 238 Syntax CONFigure EGPRs BS LAI MNC int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 99 for a two digit MNC and 999 for a three digit MNC see command CONF GSM BS LAI MNC FOR Mat The default value for int1 is 1 Description This command sets the mobile network code Query The query form of this...

Page 462: ...arameters real1 is a floating point real number The minimum value for real1 is 120 0 the maximum value is 10 0 The reso lution of real1 is 0 1 The default value for real1 is 60 0 Description Sets the standard output level of the Willtek 4400 If individual levels are selected for GPRS tests this level is used on the base channel Applies to GSM GPRS synchro nous mode Query The query form of this com...

Page 463: ...80 0 20 5 60 0 60 0 CONF EGPRs BS MSL LEV DATA Values returned in this example 80 0 20 5 60 0 60 0 Syntax CONFigure EGPRs BS MSLot LEVel MODE PredefExp Parameters PredefExp is one of the following predefined expressions INDLev STDLev Default is INDLev Description Selects between individual slot levels and standard slot level for PDTCHs If STDLev is selected the Willtek 4400 transmits at the level ...

Page 464: ...EGPRs BS NCC Value returned in this example 2 Syntax CONFigure EGPRs BS NCELl int1 int2 int3 int4 int5 int6 Parameters int1 to int6 are integers The minimum value for each intx is 0 the maximum value is 1023 The default value for each intx is 0 Description This command is used to set the channel numbers for up to six neighboring cells These channel numbers are broadcast in the system information m...

Page 465: ...will return the current setting The string delivered back will contain the short form version one of the predefined expressions as explained above Example CONFigure EGPRs BS ORIGinate ONLOcation CONF EGPRs BS ORIG Value returned in this example ONLO Syntax CONFigure EGPRs BS PDTCh ARFCn int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 1023 The default value f...

Page 466: ...expressions FR EFR Default is FR Description This command sets the type of traffic channel FR stands for full rate and EFR for enhanced full rate Query The query form of this command will return the current setting The string delivered back will contain one of the predefined expressions as explained above Example CONFigure EGPRs BS TCH TYPE EFR CONF EGPRs BS TCH TYPE Value returned in this example...

Page 467: ...ad to a DRX period of two multiframes Query The query form of this command will return the current setting The string delivered back will contain one integer Example CONFigure EGPRs MSTAtion DRX 2 CONF EGPRs MSTA DRX Value returned in this example 2 resulting in a DRX period of four multiframes Syntax CONFigure EGPRs MSTAtion TADVance int1 Parameters int1 is an integer The minimum value for int1 i...

Page 468: ...alling channels in GSM SDCCH and FACCH The FACCH is always associated with a traffic channel However some mobiles will only listen to signalling provided on the SDCCH Query The query form of this command will return the current setting The string delivered back will contain the short form version of one of the predefined expressions explained above Example CONFigure EGPRs BS CMODe FACCh CONF EGPRs...

Page 469: ...9 The resolution of each intx is 2 the default value for each intx is 5 Description Sets the uplink power level in the range of 23 39 dBm GSM900 or 26 36 dBm upper band Applies to GPRS synchronous mode Query The query form of this command will return the current setting The string delivered back will contain four integers Example CONFigure EGPRs MSTAtion PSLots 10 6 0 6 CONF EGPRs MSTA PSL Value r...

Page 470: ...the phase error measurement FREQuency means the frequency error of the mobile under test LENGth the length of the burst in microseconds UTIMe stands for the timing error of the mobile under test in microseconds taking the ordered timing advance into account POWer is the mobile s RF output power level in dBm TEMPlate indicates whether the power time template has been violated by a burst or not CORN...

Page 471: ...used with at least one parameter specified All other parameters are optional Unless organized in this sequence the start of a new AF test will always termi nate the preceding one instantly Therefore this command is an efficient way to perform several AF measurements in a sequence Please note that any AF test command will need the audio option to be installed on the Willtek 4400 Query The query for...

Page 472: ...tring FULL Syntax CONFigure EGPRs MSLot RESult int1 Parameters int1 is an integer parameter The minimum value for int1 is 1 the maximum value is 4 The default value for int1 is 1 Description Sets the number of the burst for which to deliver measurement results Delivers the results for the selected slot out of the number of all measured slots This command can be used in GPRS synchronous mode when t...

Page 473: ...rm of this command available Example CALL GSM BSOR This command will initiate a BS originated call Syntax CALL GSM RSIGnaling Parameters There are no parameters Description Makes the Willtek 4400 use reduced signaling This means that the test set will pro vide a base channel and react to the mobile s signals without prior call setup For details regarding reduced signaling please refer to section R...

Page 474: ...lease Parameters There are no parameters Description This command prepares the call termination by the mobile under test For details regarding the MS call procedure please refer to section MS Call Note This command is no longer required Query There is no query form of this command available Example As this command is no longer required an example was skipped Syntax CALL GSM PAGing PredefExp Parame...

Page 475: ...ntax CALL GSM SMS MSOR string1 Parameters There are no parameters Description This command reads out the text and the phone number of the last received short message Query There is only a query form of this command available The query will return a string containing 2 values coded as explained above Example CALL GSM SMS MSOR The string delivered back in this example is 4400 Mobile Tester 498999641...

Page 476: ...short message Query A query form of this command is not available Example CALL GSM SMS BSOR Willtek Mobile Tester 12345 This command will send a BS originated short message Syntax CALL GSM BERLoop PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is OFF Description This command is used to close or open the internal loop of the mobile for BER testing ON me...

Page 477: ...v Sub Integer Similar to RX Lev but only carried out on a subset of frames For details please refer to section MS Report Display The coding of the RX Lev Sub result value can be found in section Coding of RX Lev SMS Boolean A 0 on this position means that the mobile under test has no SMS capabilities while a 1 indicates that the mobile can handle SMS Ext Freq Boolean A 0 on this position means tha...

Page 478: ...n channel decoder the mobile esti mates the BER The coding of the result value delivered back can be found in section Coding of RX Qual Query There is only a query form of this command available The query will deliver back one integer Example CALL GSM MSINfo RXQ The string delivered back 0 Syntax CALL GSM MSINfo NUMBer Parameters There are no parameters Description This query will deliver back the...

Page 479: ...ription This query will deliver back the international mobile equipment identity and the soft ware version number as stored inside the mobile Query There is only a query form of this command available The query will deliver back a string Example CALL GSM MSINfo IMSI SV The string delivered back 52004019000043 0 01 The first part is the IMEI with the calculated check digit after the hyphen the stri...

Page 480: ... Example CALL GSM MSINfo RXLSub The integer delivered back 49 Syntax CALL GSM MSINfo SMS Parameters There are no parameters Description This query will deliver back a boolean number indicating whether the mobile is able to handle short message service SMS or not A 0 delivered back indicates that the mobile under test has no SMS capabilities Query There is only a query form of this command availabl...

Page 481: ...uery will deliver back one boolean number Example CALL GSM MSINfo EGSM The boolean number delivered back 0 Syntax CALL GSM MSINfo AFIVe Parameters There are no parameters Description This query will deliver back the A5 ciphering key supported by the mobile Query There is only a query form of this command available The query will deliver back one integer Example CALL GSM MSINfo AFIVe The integer de...

Page 482: ...are no parameters Description This query will deliver back the power control level currently used by the mobile This figure is coded according to the scheme explained in section Power Control Levels and Tolerances Query There is only a query form of this command available The query will deliver back one integer Example CALL GSM MSINfo PCONtrol The integer delivered back is 16 Syntax CALL GSM MSINf...

Page 483: ...123456789 520040190000430 3 Syntax CALL EGPRs MSINfo IMSI Parameters There are no parameters Description This query will deliver back the international mobile subscriber identity as stored on the mobile s SIM card Query There is only a query form of this command available The query will deliver back a string Example CALL EGPRs MSINfo IMSI The string delivered back in this example is 00101012345678...

Page 484: ...e signaling state required for the respective measurement or leads back to idle mode TX starts the signaling required for transmitter measurements STOP initiates signaling to terminate the current uplink and or downlink TBF DETach starts the signaling to resume GPRS idle mode Query Returns the short form predefined expression for MODE Example CONF EGPRs MSTA MSL 3 CALL EGPRs MODE TX MEAS EGPRs MUL...

Page 485: ...h GSM RFTX GROup command Notes Please keep in mind that the start of a new RF TX test will always terminate the preceding one instantly For further details regarding group measurements and their specific advantages refer to section MEASure GROup on page 360 Query The query form of this command will start the sequence of RF TX measurements as specified with the CONF GSM MEAS GRO RFTX command As soo...

Page 486: ...e mobile under test in microseconds taking the ordered timing advance into account POWer is the mobile s RF output power level in dBm TEMPlate indicates whether the power time template has been violated by a burst or not CORNer gives the RF power level in dBm at eight predefined positions of a burst see section Corner Points for details FLATness gives an indication whether the mobile s RF output p...

Page 487: ... late the PTT 8 15 CORNer eight floating point real numbers representing the RF power level in dBm at eight predefined positions of a burst 16 19 FLATness four floating point real numbers representing the absolute minimum and maximum relative RF power levels of the mobile and their positions during the active part of the burst Note For a further description of the single measurements see descripti...

Page 488: ...nuous measurement of the mobile s frequency error To read out the lat est measurement result use the FETCh GSM RFTX FREQuency command For details regarding this RF TX measurement refer to section Phase Frequency Test Menu Query The query form of this command will start the measurement and return a measure ment result value as soon as the first measurement has been completed The string delivered ba...

Page 489: ...the FETCh GSM RFTX POWer command For details regarding this RF TX measurement refer to section Burst Results Display Query The query form of this command will start the measurement and return a measure ment result value as soon as the first measurement has been completed The string delivered back will contain one floating point real number with the physical dimen sion of dBm Example MEASure GSM CO...

Page 490: ...xample MEASure GSM CONTinuous RFTX CORNer The string returned is 72 18 61 91 20 91 0 05 0 04 17 97 56 60 73 95 Syntax MEASURE GSM CONTinuous RFTX FLATness Parameters There are no parameters Description Starts a continuous measurement of the flatness of the mobile s burst during the active part of it In short words it is a search for both the absolute minimum and the absolute maximum of the mobile ...

Page 491: ...ata BURStshape command The aim of this measurement is to obtain the pure RF power levels sampled by the Willtek 4400 in order to display the shape of the burst graphically on another com puter or to perform some special analysis of the burst shape For details regarding the burst measurement also refer to section Burst Test Menu Further information regarding this kind of measurement can be found in...

Page 492: ...rror curve on another computer or to perform some special analysis of the phase error on an external com puter For details regarding the phase error measurement please also refer to section Phase Frequency Test Menu Further information regarding this kind of measurement can be found in section MEAS CONT BLOCkdata on page 358 Query The query form of this command will start the measurement and retur...

Page 493: ...on as the first measurement has been completed The string delivered back will contain a set of floating point real numbers with the physi cal dimension of dB The number of measurement result values depends on the span and the resolution currently set for the audio spectrum analyzer The data array returned will only contain measurement result data values there are no offset or reference levels in t...

Page 494: ...GSM RFTX BLOCkdata MSPectrum command The aim of this measurement is to obtain the pure modulation spectrum levels cal culated by the Willtek 4400 in order to graphically display the modulation spectrum curve on another computer or to perform some special analysis of the modulation spectrum Further information regarding this kind of measurement can also be found in section MEAS CONT BLOCkdata on pa...

Page 495: ...mmand The data array returned will only contain measurement result data values there are no offset or reference levels in the first data positions The single measurement result values are separated by commas Example MEAS GSM CONT BLOCkdata MSPectrum AVG 25 The array returned is 61 0 61 0 61 1 0 0 0 0 0 0 61 0 Syntax MEASure GSM CONTinuous BLOCkdata PSCShape CUR Rent Parameters There are no paramet...

Page 496: ... More details regarding bit classes can be found in section Voice Coding Please keep in mind that the start of a new RF RX test will always terminate the preceding one instantly The number of samples to be used for testing can be set using the CONF GSM BER COUNt command For further details regarding group measurements please refer to section MEA Sure GROup on page 360 Query The query form of this ...

Page 497: ...I Parameters There are no parameters Description Starts a continuous measurement of the residual bit error ratio on the class II bits To read out the latest measurement result use the FETCh GSM RFRX RBER CII command Notes More details regarding RBER testing can be found in section BER Live Display More details regarding bit classes can be found in section Voice Coding The number of samples to be u...

Page 498: ... details regarding bit classes can be found in section Voice Coding Please keep in mind that the start of a new RF RX test will always terminate the preceding one instantly The number of samples to be used for testing can be set using the CONF GSM BER COUNt command For further details regarding group measurements please refer to section MEA Sure GROup on page 360 Query The query form of this comma...

Page 499: ...ts a continuous measurement of the nonresidual bit error ratio of the class Ib bits To read out the latest measurement result use the FETCh GSM RFRX BER CIB command Notes More details regarding BER testing can be found in section BER Live Display More details regarding bit classes can be found in section Voice Coding The number of samples to be used for testing can be set using the CONF GSM BER CO...

Page 500: ...e used for testing can be set using the CONF GSM BER COUNt command Query The query form of this command will start the measurement and return a measure ment result value as soon as the first measurement has been completed The string delivered back will contain one floating point real number representing the bit error ratio Example MEAS GSM RFRX BER CRC Measurement result string delivered back in t...

Page 501: ...RTDelay Measurement result string delivered back 8 Syntax MEASure GSM CONTinuous RFSPectrum STOP Parameters There are no parameters Description Stops continuous RF spectrum measurements Note Stopping the test is not required since a test is automatically stopped when you start a new test Query The query form of this command is not available Example MEAS RFSP ACPM MOD MEAS RFSP STOP Starts and stop...

Page 502: ... To read out the latest measurement results use the FETCh GSM RFSP ACPM MODP com mand Notes The first result is the absolute power in dBm measured at the center frequency The remaining 23 values are the same as in the ACPM MODulation com mand According to GSM specification 05 05 this measurement will be performed on 100 kHz and 250 kHz offset from the carrier as well as on all multiples of 200 kHz...

Page 503: ...h the physical dimension dBm Example MEAS GSM CONT RFSP ACPM TRANsient In this case a measurement of the modulation spectrum will be performed As soon as the measurement has been completed a string will be delivered back containing 27 floating point real numbers Syntax MEASure CONTinuous AFANalyser STOP Parameters There are no parameters Description Stops continuous audio measurements Note Stoppin...

Page 504: ...of an AC voltage DCV is used to measure AC ripple on DC lines this measurement gives the root mean spare voltage of the AC component of the applied DC signal FREQuency is the measurement of the audio frequency in Hertz DISTortion is the distortion measurement on the third harmonic of a sine wave and expressed in while SINad is the measurement of the signal to noise ratio expressed in dB Notes Plea...

Page 505: ...tring con taining a floating point real number representing the first measurement result value The physical dimension is volt measured peak to peak Vpp Example MEAS CONT AFAN ACV PEAKp String delivered back 0 7 Syntax MEASure CONTinuous AFANalyser ACVoltage RMS Parameters There are no parameters Description Starts a continuous measurement of the RMS valued AC voltage of the AF signal applied to th...

Page 506: ... a string con taining a floating point real number representing the first measurement result value The physical dimension is Hertz Hz Example MEAS CONT AFAN FREQuency String delivered back 1000 0 Syntax MEASure CONTinuous AFANalyser DISTortion Parameters There are no parameters Description Starts a continuous measurement of the third harmonic distortion of a sine wave applied to the audio analyzer...

Page 507: ...ith the CONF MEAS GRO PSUP command To read out the latest measurement results use the FETCh PSUP GROup command Notes To perform any power and current consumption measurements on your Willtek 4400 the MS Power Supply and Current Measurements Option must be installed For further details regarding group measurements please refer to section MEASure GROup Query The query form of this command will start...

Page 508: ...e measurement result values delivered back is as follows APOW representing the average power consumption in mW ACUR representing the average current consumption in mA PCUR representing the peak current consumption in mA Example MEAS PSUP ALL In this case all power current consumption measurements are performed in one go As soon as all measurements have been completed and all measurement results ob...

Page 509: ... soon as the measurement has been completed a string will be delivered back containing the measurement result value for example 304 2 Syntax MEASure CONTinuous PSUPply PCURrent Parameters There are no parameters Description Starts a continuous measurement of the peak current consumption test To read out the latest measurement result use the FETCh PSUP PCUR command Any power and current consumption...

Page 510: ...measurement result values i e floating point real numbers integers or boolean numbers depends on the measure ments specified The order of the measurement result values within the string is as described below for the MEAS GSM CONT RFTX ALL command Note Please keep in mind that the number of measurement result values delivered back is the number of measurement result values of a single execution mul...

Page 511: ...re ARRay on page 356 For a further description of the single measurements see description of the related commands below Query The query form of this command performs the measurements and after all mea surements have been completed and all measurement results obtained delivers a string containing 19 int1 measurement result values The single measurement result values are separated by commas The orde...

Page 512: ...erform the measurement the specified number of times int1 parameter As soon as all measurements have been completed all measurement result values will be returned in a string The string delivered back will contain int1 floating point real numbers with the physical dimension of degrees The single measurement results are separated by commas Example MEASure GSM ARRay RFTX PPEAk 5 The string returned ...

Page 513: ...uency error measurement will be per formed five times The measurement result values will be stored internally and are read out by the FETC command The string returned is 22 33 22 53 21 97 22 41 21 79 Syntax MEASure GSM ARRay RFTX LENGth int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 100 The default value for int1 is 0 Description Performs the measurement of...

Page 514: ...rement results are separated by commas Example MEASure GSM ARRay RFTX UTIMe 5 The string returned is 0 0 0 1 0 0 0 2 0 1 Syntax MEASure GSM ARRay RFTX POWer int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 1000 The default value for int1 is 0 Description Performs the measurement of the mobile s RF output power level a specific number of times set with the int...

Page 515: ...are read out by the FETC command The string returned is 0 0 0 0 0 0 1 0 0 0 indicating that the seventh burst checked violated the PTT Syntax MEASure GSM ARRay RFTX CORNer int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 100 The default value for int1 is 0 Description Performs the measurement of the mobile s RF output power level on eight user definable posit...

Page 516: ...s have been completed all measurement result values will be returned in a string The string delivered back will contain 4 int1 floating point real numbers with the physical dimensions as explained above The single measurement results are separated by commas Example MEASure GSM ARRay RFTX FLATness 2 The string returned is 0 12 113 7 0 56 34 0 0 35 57 9 0 75 117 2 Syntax MEASure GSM ARRay RFTX FPOWe...

Page 517: ...r further details regarding group measurements please refer to section MEA Sure GROup on page 360 More information regarding ARRay measurements can be found in section MEASure ARRay on page 356 Query The query form of this command will perform the measurements the specified num ber of times int1 parameter After all measurements have been completed and all measurement results obtained the query del...

Page 518: ...eturned is 0 2 0 2 0 1 0 3 0 2 Syntax MEASure GSM ARRay RFRX RBER CII int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 100 The default value for int1 is 0 Description Performs the measurement of the residual bit error ratio of the class II bits a specific number of times set with the int1 parameter To read out the entire measure ment results array use the FET...

Page 519: ...er To read out the entire measurement results array use the FETCh GSM RFRX BER ALL com mand The RF RX tests performed by this command are CIA the nonresidual bit error ratio of the class Ia bits CIB the nonresidual bit error ratio of the class Ib bits and CII the nonresidual bit error ratio of the class II bits Notes More details regarding BER testing can be found in section BER Live Display More ...

Page 520: ...e specified number of times int1 parameter As soon as all measurements have been completed all measurement result values will be returned in a string The string delivered back will contain int1 floating point real numbers representing the bit error ratios The single measurement results are separated by commas Example MEASure GSM ARRay RFRX BER CIA 5 The string returned is 1 4 1 4 1 5 1 7 1 3 Synta...

Page 521: ...red back will contain int1 floating point real numbers representing the bit error ratios The single measurement results are separated by commas Example MEASure GSM ARRay RFRX BER CII 5 The string returned is 1 4 1 4 1 5 1 7 1 3 Syntax MEASure GSM ARRay RFRX BER CRC int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 100 The default value for int1 is 0 Descriptio...

Page 522: ...e bit error ratios The single measurement results are separated by commas Example MEASure GSM ARRay RFRX FBER 5 The string returned is 1 4 1 4 1 5 1 7 1 3 Syntax MEASure GSM ARRay RFRX RTDelay int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 100 The default value for int1 is 0 Description Performs the measurement of the round trip delay of data during bit err...

Page 523: ...the power in a 30 kHz bandwidth at the following frequencies 1 8 MHz 1 6 MHz 1 4 MHz 1 2 MHz 1 0 MHz 800 kHz 600 kHz 400 kHz 250 kHz 200 kHz 100 kHz 0 kHz 100 kHz 200 kHz 250 kHz 400 kHz 600 kHz 800 kHz 1 0 MHz 1 2 MHz 1 4 MHz 1 6 MHz 1 8 MHz Example MEAS GSM ARR RFSPectrum ACPM MODulation 5 FETCh GSM RFSP ACPM MOD The string returned would contain 115 floating point real numbers representing the ...

Page 524: ... times set with the int1 parameter To read out the entire mea surement results array use the FETCh GSM RFSP ACPM TRAN command Note According to GSM specification 05 05 this measurement will be performed on 0 400 600 1 200 and 1 800 kHz offset from the carrier All measure ments will be performed with a measuring bandwidth of 30 kHz For additional information also the measurement values of the adjac...

Page 525: ...ments have been com pleted a string will be delivered back It will contain floating point real numbers representing the measurement result values The order of the measurement result values returned is as described below see command MEAS GSM ARR AFAN ALL The single measurement result values are separated by commas Note The number of measurement result values delivered back is the number of measurem...

Page 526: ...measurement results obtained delivers a string containing 6 int1 measurement result values The single measurement result values are separated by commas All measurement result values are floating point real numbers The order of these measurement result values delivered back is as follows 1 ACVPeakp representing the AC peak to peak voltage of the AF signal 2 ACVRms representing the RMS valued AC vol...

Page 527: ... form of this command will perform the measurement the specified number of times int1 parameter As soon as all measurements have been completed all measurement result values will be returned in a string The string delivered back will contain int1 floating point real numbers The physical dimension of the measure ment result values is volt RMS valued Vrms The single measurement results are separated...

Page 528: ...point real numbers The physical dimension of the measure ment result values is Hertz The single measurement results are separated by commas Example MEASure ARRay AFANanlyser FREQ 5 The string returned is 1000 0 1000 5 1000 9 999 9 1000 0 Syntax MEASure ARRay AFAN DISTortion int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 100 The default value for int1 is 0 D...

Page 529: ...nteger The minimum value for int1 is 0 the maximum value is 100 The default value for int1 is 0 Description Performs the power supply measurements specified with the CONF MEAS GRO PSUP command for a specific number of times set with the int1 parameter To read out the entire measurement results array use the FETCh PSUP GROup command Notes To perform any power and current consumption measurements on...

Page 530: ... values delivered back is as follows APOW representing the average power consumption in mW ACUR representing the average current consumption in mA PCUR representing the peak current consumption in mA Example MEASure ARRay PSUP ALL 10 In this case all power current consumption measurements are performed ten times As soon as all measurements have been completed and all measurement results obtained a...

Page 531: ...ure ARRay PSUPply PCURrent int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 100 The default value for int1 is 0 Description Performs the peak current consumption measurement for a specific number of times set with the int1 parameter To read out the latest measurement results use the FETCh PSUP PCUR command Query The query form of this command starts the measu...

Page 532: ...tart the sequence of RF TX measurements as specified with the CONF EGPRs MEAS GRO RFTX command As soon as all measurements of the first sequence have been completed a string will be delivered back containing the related measurement result values separated by commas The type of the measurement result values i e floating point real numbers integers or boolean numbers depends on the measurements spec...

Page 533: ...ors DC setup it is usually an undesire leakage produced due to a DC offset in the phones I Q modulator It is measured in dBc FREQuency means the frequency error of the mobile under test LENGth the length of the burst in microseconds UTIMe stands for the timing error of the mobile under test in microseconds taking the ordered timing advance into account POWer is the mobile s RF output power level i...

Page 534: ...ber representing the mobile s RF output power level in dBm 9 TEMPlate boolean number A 0 indicates that the power time template PTT was not violated by the last burst measured while a 1 means that the burst did vio late the PTT 10 17 CORNer eight floating point real numbers representing the RF power level in dBm at eight predefined positions of a burst Example MEASure EGPRs CONTinuous RFTX ALL In ...

Page 535: ...eede by 95 of the symbols of a burst The 95 EVM is shown in To read out the mea surement results use the FETCh EGPRs RFTX ENFTh command Query The query form of this command will start the measurement and return a measure ment result value as soon as the first measurement has been completed The string delivered back will contain one floating point real number with the physical dimen sion of Example...

Page 536: ...is 31 92 Syntax MEASure EGPRs CONTinuous RFTX LENGth Parameters There are no parameters Description Starts a continuous measurement of the burst length in GSM mode To read out the latest measurement result use the FETCh EGPRs RFTX LENGth command For details regarding this RF TX measurement refer to section Burst Test Menu Query The query form of this command will start the measurement and return a...

Page 537: ...EASure EGPRs CONTinuous RFTX POWer The string returned in this example is 11 22 Syntax MEASure EGPRs CONTinuous RFTX TEMPlate Parameters There are no parameters Description Starts a continuous check of the UL burst against the power time template PTT To read out the latest measurement result use the FETCh EGPRs RFTX TEM Plate command For details regarding this RF TX measurement refer to section Bu...

Page 538: ...d out the measurement result values of the last burst sampled use the FETCh EGPRs RFTX BLOCkdata BURStshape command The aim of this measurement is to obtain the pure RF power levels sampled by the Willtek 4400 in order to display the shape of the burst graphically on another com puter or to perform some special analysis of the burst shape For details regarding the burst measurement also refer to s...

Page 539: ...ription Starts a continuous measurement of the modulation spectrum curve To read out the measurement result values of the latest modulation spectrum curve use the FETCh EGPRs RFTX BLOCkdata MSPectrum command The aim of this measurement is to obtain the pure modulation spectrum levels calcu lated by the Willtek 4400 in order to graphically display the modulation spectrum curve on another computer o...

Page 540: ...s and return an array of measurement result values as soon as all the measurements have been completed The string delivered back will contain a set of floating point real numbers with the physical dimension of dB The number of measurement result values depends on the span and the resolution currently set for the modulation spectrum analyzer The span can be set using the RFSP MSP SPAN command the r...

Page 541: ...s the measurement has been completed a string will be delivered back containing 23 floating point real numbers Syntax MEASure EGPRs CONTinuous RFSPectrum ACPM MODPower Parameters There are no parameters Description Starts a continuous measurement of the ACPM modulation spectrum To read out the latest measurement results use the FETCh EGPRs RFSP ACPM MODP com mand Notes The first result is the abso...

Page 542: ...arts the measurement and delivers a string con taining 27 measurement result values separated by commas These 27 measurement result values are floating point real numbers with the physical dimension dBm Example MEAS EGPRs CONT RFSP ACPM TRANsient In this case a measurement of the modulation spectrum will be performed As soon as the measurement has been completed a string will be delivered back con...

Page 543: ... power in a 30 kHz bandwidth at the following frequencies 1 8 MHz 1 6 MHz 1 4 MHz 1 2 MHz 1 0 MHz 800 kHz 600 kHz 400 kHz 250 kHz 200 kHz 100 kHz 0 kHz 100 kHz 200 kHz 250 kHz 400 kHz 600 kHz 800 kHz 1 0 MHz 1 2 MHz 1 4 MHz 1 6 MHz 1 8 MHz Example MEAS EGPRs CONT MULT RFSP ACPM MOD For the number of time slots measured set to 1 an example of the string returned is 1 5 1 6 3 10 2 12 8 9 6 16 0 15 3...

Page 544: ...om pleted a string will be delivered back containing the related measurement result val ues separated by commas The type of the measurement result values i e floating point real numbers integers or boolean numbers depends on the measurements specified The order of the measurement result values within the string is as described below for the MEAS EGPRs CONT RFTX ALL command Note Please keep in mind...

Page 545: ...ages refer to section MEAS GROup For ARRay measurements in general check with section MEASure ARRay For a further description of the single measurements see description of the related commands below Query The query form of this command performs the measurements and after all measure ments have been completed and all measurement results obtained delivers a string containing 17 int1 measurement resu...

Page 546: ... a string containing int1 floating point real numbers with the physical dimension of representing the measurement results The single measurement results are separated by commas Example MEAS EGPRs ARR RFTX ERMS 5 FETC EGPRs RFTX ERMS The error vector magnitude rms averaged measurement will be performed five times The measurement results will be stored internally and read by the FETC command An exam...

Page 547: ...TC command An example of the string returned is 4 33 5 53 1 97 3 41 2 79 Syntax MEASure EGPRs ARRay RFTX EOFFset int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 100 The default value for int1 is 0 Description Measures multiple times set with the int1 parameter the Origin Offset The origin offset indicates the accuracy of the i Q modulators DC setup it is usu...

Page 548: ...he burst length To read out the entire measurement results array use the FETCh EGPRs RFTX LENGth command Query The query form of this command returns a string containing int1 floating point real numbers with the physical dimension of microseconds representing the measure ment results The single measurement results are separated by commas Example MEAS EGPRs ARR RFTX LENG 5 FETC EGPRs RFTX LENG The ...

Page 549: ...e times set with the int1 parameter if TX burst fits into the power time template To read out the entire measurement results array use the FETCh EGPRs RFTX TEMPlate command Note The power time template is user definable It can be set up using the CALC EGPRs RFTX TEMP commands Query The query form of this command returns a string containing int1 boolean numbers A 0 indicates no violation of the PTT...

Page 550: ... carrier up to and including an offset of 1 8 MHz If one includes the carrier frequency as well 0 0 dBc this adds up to the 23 measurement values returned All measurements will be performed with a measuring bandwidth of 30 kHz More information regarding ARRay measurements can be found in section MEASure ARRay Query The query form of this command will perform the measurement the specified number of...

Page 551: ...sion dBc The total count of the values is 24 int1 The individual measurement results are separated by commas Example MEAS EGPRs ARR RFSPectrum ACPM MODPower 5 FETCh EGPRs RFSP ACPM MODP The string returned in this example would contain 120 floating point real numbers representing the 24 measurement result values of five measurement runs Syntax MEASure EGPRs ARRay RFSPectrum ACPM TRANsient int1 Par...

Page 552: ... the burst shape is inside limits 1 indicates outside limits Example CONF EGPRs MSTA MSL 2 MEAS EGPRs ARR MULT RFTX TEMP 3 Returns a string like the following 2 0 0 2 1 0 2 0 0 In this example the signal hit the limits in the first slot of the second measurement Syntax MEASure EGPRs ARRay MULTislot RFSPectrum ACPM MODulation int1 Parameters int1 specifies how many measurements shall be taken Up to...

Page 553: ...at the start of a new RF TX test will always terminate the preceding one instantly For further details regarding group measurements and their specific advantages refer to section MEAS GROup For CONTinuous measurements in general check with section MEASure EGPRs CONTinuous Query The query form of this command will start the sequence of RF TX measurements as specified with the CONF EGPRs MEAS GRO RF...

Page 554: ...ors DC setup it is usually an undesire leakage produced due to a DC offset in the phones I Q modulator It is measured in dBc FREQuency means the frequency error of the mobile under test LENGth the length of the burst in microseconds UTIMe stands for the timing error of the mobile under test in microseconds taking the ordered timing advance into account POWer is the mobile s RF output power level i...

Page 555: ...r representing the mobile s RF output power level in dBm 9 TEMPlate boolean number A 0 indicates that the power time template PTT was not violated by the last burst measured while a 1 means that the burst did vio late the PTT 10 17 CORNer eight floating point real numbers representing the RF power level in dBm at eight predefined positions of a burst Example MEASure EGPRs CONTinuous RFTX ALL In th...

Page 556: ...eede by 95 of the symbols of a burst The 95 EVM is shown in To read out the mea surement results use the FETCh EGPRs RFTX ENFTh command Query The query form of this command will start the measurement and return a measure ment result value as soon as the first measurement has been completed The string delivered back will contain one floating point real number with the physical dimen sion of Example...

Page 557: ...is 31 92 Syntax MEASure EGPRs CONTinuous RFTX LENGth Parameters There are no parameters Description Starts a continuous measurement of the burst length in GSM mode To read out the latest measurement result use the FETCh EGPRs RFTX LENGth command For details regarding this RF TX measurement refer to section Burst Test Menu Query The query form of this command will start the measurement and return a...

Page 558: ...EASure EGPRs CONTinuous RFTX POWer The string returned in this example is 11 22 Syntax MEASure EGPRs CONT RFTX TEMPlate Parameters There are no parameters Description Starts a continuous check of the UL burst against the power time template PTT To read out the latest measurement result use the FETCh EGPRs RFTX TEM Plate command For details regarding this RF TX measurement refer to section Burst Te...

Page 559: ...urement result values of the last burst sampled use the FETCh EGPRs RFTX BLOCkdata BURStshape command The aim of this measurement is to obtain the pure RF power levels sampled by the Willtek 4400 in order to display the shape of the burst graphically on another com puter or to perform some special analysis of the burst shape For details regarding the burst measurement also refer to section Burst T...

Page 560: ...tinuous measurement of the modulation spectrum curve To read out the measurement result values of the latest modulation spectrum curve use the FETCh EGPRs RFTX BLOCkdata MSPectrum command The aim of this measurement is to obtain the pure modulation spectrum levels calcu lated by the Willtek 4400 in order to graphically display the modulation spectrum curve on another computer or to perform some sp...

Page 561: ...y of measurement result values as soon as all the measurements have been completed The string delivered back will contain a set of floating point real numbers with the physical dimension of dB The number of measurement result values depends on the span and the resolution currently set for the modulation spectrum analyzer The span can be set using the RFSP MSP SPAN command the resolution may be set...

Page 562: ...s the measurement has been completed a string will be delivered back containing 23 floating point real numbers Syntax MEASure EGPRs CONTinuous RFSPectrum ACPM MODPower Parameters There are no parameters Description Starts a continuous measurement of the ACPM modulation spectrum To read out the latest measurement results use the FETCh EGPRs RFSP ACPM MODP com mand Notes The first result is the abso...

Page 563: ...ment and delivers a string con taining 27 measurement result values separated by commas These 27 measurement result values are floating point real numbers with the physical dimension dBm Example MEAS EGPRs CONT RFSP ACPM TRANsient In this case a measurement of the modulation spectrum will be performed As soon as the measurement has been completed a string will be delivered back containing 27 float...

Page 564: ...power in a 30 kHz bandwidth at the following frequencies 1 8 MHz 1 6 MHz 1 4 MHz 1 2 MHz 1 0 MHz 800 kHz 600 kHz 400 kHz 250 kHz 200 kHz 100 kHz 0 kHz 100 kHz 200 kHz 250 kHz 400 kHz 600 kHz 800 kHz 1 0 MHz 1 2 MHz 1 4 MHz 1 6 MHz 1 8 MHz Example MEAS EGPRs CONT MULT RFSP ACPM MOD For the number of time slots measured set to 1 an example of the string returned is 1 5 1 6 3 10 2 12 8 9 6 16 0 15 3 ...

Page 565: ...m pleted a string will be delivered back containing the related measurement result val ues separated by commas The type of the measurement result values i e floating point real numbers integers or boolean numbers depends on the measurements specified The order of the measurement result values within the string is as described below for the MEAS EGPRs CONT RFTX ALL command Note Please keep in mind ...

Page 566: ...ages refer to section MEAS GROup For ARRay measurements in general check with section MEASure ARRay For a further description of the single measurements see description of the related commands below Query The query form of this command performs the measurements and after all measure ments have been completed and all measurement results obtained delivers a string containing 17 int1 measurement resu...

Page 567: ... a string containing int1 floating point real numbers with the physical dimension of representing the measurement results The single measurement results are separated by commas Example MEAS EGPRs ARR RFTX ERMS 5 FETC EGPRs RFTX ERMS The error vector magnitude rms averaged measurement will be performed five times The measurement results will be stored internally and read by the FETC command An exam...

Page 568: ...TC command An example of the string returned is 4 33 5 53 1 97 3 41 2 79 Syntax MEASure EGPRs ARRay RFTX EOFFset int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 100 The default value for int1 is 0 Description Measures multiple times set with the int1 parameter the Origin Offset The origin offset indicates the accuracy of the i Q modulators DC setup it is usu...

Page 569: ...he burst length To read out the entire measurement results array use the FETCh EGPRs RFTX LENGth command Query The query form of this command returns a string containing int1 floating point real numbers with the physical dimension of microseconds representing the measure ment results The single measurement results are separated by commas Example MEAS EGPRs ARR RFTX LENG 5 FETC EGPRs RFTX LENG The ...

Page 570: ...e times set with the int1 parameter if TX burst fits into the power time template To read out the entire measurement results array use the FETCh EGPRs RFTX TEMPlate command Note The power time template is user definable It can be set up using the CALC EGPRs RFTX TEMP commands Query The query form of this command returns a string containing int1 boolean numbers A 0 indicates no violation of the PTT...

Page 571: ... carrier up to and including an offset of 1 8 MHz If one includes the carrier frequency as well 0 0 dBc this adds up to the 23 measurement values returned All measurements will be performed with a measuring bandwidth of 30 kHz More information regarding ARRay measurements can be found in section MEASure ARRay Query The query form of this command will perform the measurement the specified number of...

Page 572: ...sion dBc The total count of the values is 24 int1 The individual measurement results are separated by commas Example MEAS EGPRs ARR RFSPectrum ACPM MODPower 5 FETCh EGPRs RFSP ACPM MODP The string returned in this example would contain 120 floating point real numbers representing the 24 measurement result values of five measurement runs Syntax MEASure EGPRs ARRay RFSPectrum ACPM TRANsient int1 Par...

Page 573: ... the burst shape is inside limits 1 indicates outside limits Example CONF EGPRs MSTA MSL 2 MEAS EGPRs ARR MULT RFTX TEMP 3 Returns a string like the following 2 0 0 2 1 0 2 0 0 In this example the signal hit the limits in the first slot of the second measurement Syntax MEASure EGPRs ARRay MULTislot RFSPectrum ACPM MODulation int1 Parameters int1 specifies how many measurements shall be taken Up to...

Page 574: ...inuous measurements in general check with section MEASure EGPRs CONTinuous Query The query form of this command will start the sequence of RF TX measurements as specified with the CONF EGPRs MEAS GRO RFTX command As soon as all measurements of the first sequence have been completed a string will be delivered back containing the related measurement result values separated by commas The type of the ...

Page 575: ...Appendix A SCPI Command Reference MEASure subsystem 4460 GSM System Option and 4468 EDGE System Option Version 12 20 551 MEASure EGPRs CONTinuous RFTX ALL ...

Page 576: ...Appendix A SCPI Command Reference MEASure subsystem 552 4460 GSM System Option and 4468 EDGE System Option Version 12 20 Syntax MEASure EGPRs CONTinuous RFTX ALL ...

Page 577: ...Appendix A SCPI Command Reference MEASure subsystem 4460 GSM System Option and 4468 EDGE System Option Version 12 20 553 Parameters There are no parameters ...

Page 578: ...ion MEAS GROup For CONTinu ous measurements in general check with section MEASure EGPRs CON Tinuous For a further description of the single measurements see description of the related commands below Query The query form of this command starts the measurements and after all measure ments have been completed and all measurement results obtained delivers a string containing 17 measurement result valu...

Page 579: ... completed The string delivered back will contain one floating point real number with the physical dimen sion of Example MEAS EGPRs ARR RFTX ERMS 5 FETC EGPRs RFTX ERMS The error vector magnitude rms averaged measurement will be performed five times The measurement results will be stored internally and read by the TT FETC TT command An example of the string returned is 2 33 2 53 1 97 2 41 1 79 Syn...

Page 580: ...sults will be stored internally and read by the FETC command An example of the string returned is 4 33 5 53 1 97 3 41 2 79 Syntax MEASure EGPRs CONTinuous RFTX EOFFset Parameters There are no parameters Description Starts a continuous measurement of the origin offset The origin offset indicates the accuracy of the i Q modulators DC setup it is usually an undesire leakage produced due to a DC offse...

Page 581: ...t the latest measurement result use the FETCh EGPRs RFTX LENGth command For details regarding this RF TX measurement refer to section Burst Test Menu Query The query form of this command will start the measurement and return a measure ment result value as soon as the first measurement has been completed The string delivered back will contain one floating point real number with the physical dimen s...

Page 582: ...s RFTX POWer The string returned in this example is 11 22 Syntax MEASure EGPRs CONT RFTX TEMPlate Parameters There are no parameters Description Starts a continuous check of the UL burst against the power time template PTT To read out the latest measurement result use the FETCh EGPRs RFTX TEM Plate command For details regarding this RF TX measurement refer to section Burst Test Menu The power time...

Page 583: ...ng this RF TX measurement please refer to section Burst Results Display More details regarding the corner points can be found in section Corner Points Note The corner points can also be set using the CALC RFTX CORN commands Query The query form of this command will start the measurement and return eight mea surement result values as soon as the first measurement has been completed The string deliv...

Page 584: ...ddle of the burst add 2 to this first value of the array to find the relative position within this data array as the first two positions of this array are no data values The second number is the absolute peak power level of the burst in dBm obtained at the middle of the burst All following 709 data values are relative RF power levels in dB with the peak power level second data value of the array b...

Page 585: ...ASure BLOCkdata Query The query form of this command will start the measurement and return an array of measurement result values as soon as the first measurement has been completed The string delivered back will contain a set of floating point real numbers with the physi cal dimension of dB The number of measurement result values depends on the span and the resolution currently set for the modulat...

Page 586: ...ted by commas Example MEAS EGPRs CONT BLOCkdata MSPectrum AVG 25 The array returned in this example is 61 0 61 0 61 1 0 0 0 0 0 0 61 0 Syntax MEASure EGPRs CONTinuous RFSPectrum ACPM MODulation Parameters There are no parameters Description Starts a continuous measurement of the ACPM modulation spectrum To read out the latest measurement results use the FETCh EGPRs RFSP ACPM MOD command Note Accor...

Page 587: ...ment values returned All measurements will be performed with a measuring bandwidth of 30 kHz Query The query form of this command starts the measurement and delivers a string con taining the absolute power at the center frequency within a 30 kHz bandwidth as the first value with the physical dimension of dBm and after that 23 measurement result values all separated by commas These 23 measurement r...

Page 588: ...his case a measurement of the modulation spectrum will be performed As soon as the measurement has been completed a string will be delivered back containing 27 floating point real numbers Syntax MEASure EGPRs CONTinuous MULTislot RFTX TEMPlate Parameters There are no parameters Description Checks repetitively the TX bursts against the power time template PTT To read out the latest measurement resu...

Page 589: ... this adds up to the 23 measurement values returned All measurements will be performed with a measuring bandwidth of 30 kHz Query The query form of this command starts the measurements and delivers a string con taining an integer indicating the number of time slots measured followed by 23 float ing point real numbers for each time slot representing the spectrum values with the physical dimension d...

Page 590: ... this adds up to the 23 measurement values returned All measurements will be performed with a measuring bandwidth of 30 kHz Query The query form of this command starts the measurements and delivers a string con taining an integer indicating the number of time slots measured followed by 27 float ing point real numbers for each time slot representing the spectrum values with the physical dimension d...

Page 591: ... e floating point real numbers integers or boolean numbers depends on the measurements specified The order of the measurement result values within the string is as described below for the MEAS EGPRs CONT RFTX ALL command Note Please keep in mind that the number of measurement results delivered back is the number of measurement results of a single execution multiplied with the int1 parameter Exampl...

Page 592: ... 4460 GSM System Option and 4468 EDGE System Option Version 12 20 MEASure EGPRs ARRay RFTX ALL Syntax MEASure EGPRs ARRay RFTX ALL int1 gt Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 100 The default value for int1 is 0 ...

Page 593: ...ages refer to section MEAS GROup For ARRay measurements in general check with section MEASure ARRay For a further description of the single measurements see description of the related commands below Query The query form of this command performs the measurements and after all measure ments have been completed and all measurement results obtained delivers a string containing 17 int1 measurement resu...

Page 594: ... a string containing int1 floating point real numbers with the physical dimension of representing the measurement results The single measurement results are separated by commas Example MEAS EGPRs ARR RFTX ERMS 5 FETC EGPRs RFTX ERMS The error vector magnitude rms averaged measurement will be performed five times The measurement results will be stored internally and read by the FETC command An exam...

Page 595: ... measurement results will be stored internally and read by the FETC command An example of the string returned is 4 33 5 53 1 97 3 41 2 79 Syntax MEASure EGPRs ARRay RFTX EOFFset int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 100 The default value for int1 is 0 Description Measures multiple times set with the int1 parameter the Origin Offset The origin offse...

Page 596: ...s will be stored internally and read by the FETC command An example of the string returned is 22 33 22 53 21 97 22 41 21 79 Syntax MEASure EGPRs ARRay RFTX LENGth int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 100 The default value for int1 is 0 Description Measures multiple times set with the int1 parameter the burst length To read out the entire measureme...

Page 597: ...ng int1 floating point real numbers with the physical dimension of dBm representing the measurement results The single measurement results are separated by commas Example MEAS EGPRs ARR RFTX POW 5 An example of the string returned is 11 22 11 09 11 21 11 14 10 99 Syntax MEAS EGPRs ARR RFTX TEMP int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 100 The default ...

Page 598: ...ith the int1 parameter To read out the entire measurement results array use the FETCh EGPRs RFSP ACPM MOD command Note According to GSM specification 05 05 this measurement will be performed on 100 kHz and 250 kHz offset from the carrier as well as on all multiples of 200 kHz offset from the carrier up to and including an offset of 1 8 MHz If one includes the carrier frequency as well 0 0 dBc this...

Page 599: ... carrier frequency 0 0 dBc this adds up to the 23 measurement val ues returned All measurements will be performed with a measuring bandwidth of 30 kHz More information regarding ARRay measurements can be found in section MEASure ARRay Query The query form of this command will perform the measurement the specified number of times int1 parameter As soon as all measurements have been completed all me...

Page 600: ...ers The physical dimension is dBm The single measurement results are separated by commas Example MEAS EGPRs ARR RFSPectrum ACPM TRANsient 5 FETCh EGPRs RFSP ACPM TRAN The string returned in this example would contain 135 floating point real numbers representing the 27 measurement result values of five measurement runs Syntax MEASure EGPRs ARRay MULTislot RFTX TEMPlate int1 Parameters int1 specifie...

Page 601: ...t values see MEAS EGPRs ACPM MODulation Example CONF EGPRs MSTA MSL 2 Syntax MEASure EGPRs ARRay MULTislot RFSPectrum ACPM MEASure EGPRs ARRay MULTislot RFSPectrum ACPM TRANsient int1 TRANsient int1 Parameters int1 specifies how many measurements shall be taken Up to 100 measurements are supported Description Measures a defined number of times the RF output spectrum due to switching tran sients on...

Page 602: ...s Description There is solely a query form of this command available Query The query form of this command will return the latest measurement result values of the sequence of RF TX measurements as specified with the CONF MEAS GRO RFTX command and measured with the MEAS GSM ARRay RFTX GROup command The string returned contains the related measurement result values The type of the measurement result ...

Page 603: ... output power level in dBm 7 TEMPlate boolean number A 0 indicates that the power time template was not violated by a burst while a 1 means that there was a violation of the power time template 8 15 CORNer eight floating point real numbers representing the RF power level in dBm at eight predefined positions of a burst see section Corner Points for details 16 19 FLATness four floating point real nu...

Page 604: ...eters Description There is solely a query form of this command available Query The query form of this command returns the latest measurement result value s of the MEAS GSM ARRay RFTX FREQ measurement The string delivered back will contain at least one floating point real number with the physical dimension of Hertz Example MEAS GSM ARR RFTX FREQ 5 FETCh GSM RFTX FREQ The values returned are 22 49 2...

Page 605: ... measurement The string delivered back will contain at least one floating point real number with the physical dimension of dBm Example MEAS GSM RFTX POWer FETCh GSM RFTX POWer The value returned is 13 05 Syntax FETCh GSM RFTX TEMPlate Parameters There are no parameters Description There is solely a query form of this command available Query The query form of this command returns the latest result ...

Page 606: ...ast four floating point real numbers with the physical dimen sions of dBm first and third number and bit periods second and fourth number Example MEAS GSM RFTX FLATness FETCh GSM RFTX FLAT The values returned are 0 12 113 7 0 56 34 0 Syntax FETCh GSM RFTX FPOWer Parameters There are no parameters Description There is solely a query form of this command available Query The query form of this comman...

Page 607: ...nt result values returned in the result string Example MEAS GSM BLOC BURS FETC GSM BLOC BURS The FETC command will return a data array containing 711 floating point real num bers Syntax FETCh GSM BLOCkdata PHASeerror Parameters There are no parameters Description There is solely a query form of this command available Query The query form of this command returns the latest data block describing the...

Page 608: ...bing the graph of the modulation spectrum measurement For further details regarding this measure ment please refer to the description of the MEAS GSM BLOC MSP command and the explanations given in section MEASure BLOCkdata There you will also find all information about the number type and order of the measurement result values returned in the result string Example MEAS GSM BLOC MSP FETC GSM BLOC M...

Page 609: ...lt values for the three residual bit error measurements The string delivered back is 0 2 1 7 0 3 This means that the RBER for class Ib bits is 0 2 Syntax FETCh GSM RFRX RBER CIB Parameters There are no parameters Description There is solely a query form of this command available Query The query form of this command will return the latest measurement result value s of the MEAS GSM ARRay RFRX RBER C...

Page 610: ...ned will contain three floating point real numbers separated by commas The order of these numbers and their meaning is as follows 1 the result of the nonresidual bit error ratio measurement of the class Ia bits 2 the result of the nonresidual bit error ratio measurement of the class Ib bits and 3 the result of the nonresidual bit error ratio measurement of the class II bits Example MEAS GSM ARR RF...

Page 611: ... query form of this command available Query The query form of this command will return the latest measurement result value s of the MEAS GSM ARRay RFRX BER CII measurement The string delivered back will contain at least one floating point real number Example MEAS GSM RFRX BER CII FETCh GSM RFRX BER CII The string delivered back is 1 9 Syntax FETCh GSM RFRX BER CRC Parameters There are no parameter...

Page 612: ... MEASure GSM ARRay RFRX RTDelay measurement The string delivered back will contain at least one integer Example MEAS GSM RFRX RTD FETCh GSM RFRX RTD The string delivered back is 8 Syntax FETCh GSM RFSP ACPM MODulation Parameters There are no parameters Description There is solely a query form of this command available Query The query form of this command returns the latest data array for the ACPM ...

Page 613: ...PM TRAN command Example MEAS GSM RFSPectrum ACPM TRAN FETC GSM RFSP ACPM TRAN The FETC command will return a data array containing 27 floating point real num bers Syntax FETCh AFANanlyser GROup Parameters There are no parameters Description There is solely a query form of this command available Query The query form of this command will return the latest measurement result values of the sequence of...

Page 614: ... DISTortion representing the third harmonic distortion of the applied sine wave AF signal expressed in percent 6 SINad representing the signal to noise ratio of the applied AF signal expressed in dB Note Any AF test will need the audio option to be installed on your Willtek 4400 Example MEAS ARR AFAN ALL 2 FETCh AFAN ALL In this example the six most important AF measurements are performed twice in...

Page 615: ...e Any AF test will need the audio option to be installed on your Willtek 4400 Example MEAS AFAN DCV FETC AFAN DCV The string delivered back is 1 7 Syntax FETCh AFANalyser FREQuency Parameters There are no parameters Description There is solely a query form of this command available Query The query form of this command will return the latest measurement result value s of the MEAS ARRay AFAN FREQ me...

Page 616: ...e latest measurement result values of the sequence of power current consumption measurements as specified with the CONF MEAS GRO PSUP command and measured with the MEAS ARRay PSUP GRO command The string returned contains the related measurement result values separated by commas All measurement result values are floating point real numbers The number of measurement result values handed back depends...

Page 617: ...rameters There are no parameters Description There is solely a query form of this command available Query This query returns the latest measurement result values of the MEAS ARRay PSUP APOW measurement in a string The measurement result value is a floating point real numbers representing the average current consumption expressed in mA Note Any current measurement will need the MS Power Supply and ...

Page 618: ...ax FETCh EGPRs RFTX GROup Parameters There are no parameters Description There is solely a query form of this command available Query The query form of this command will return the latest measurement result values of the sequence of EGPRS RF TX measurements as specified with the CONF EGPRs MEAS GRO RFTX command and measured with the MEAS EGPRs ARRay RFTX GROup command As soon as all measure ments ...

Page 619: ...r representing the mobile s frequency error 6 LENGth floating point real number representing the length of the burst in micro seconds 7 UTIMe floating point real number representing the timing error of the mobile under test in microseconds taking the ordered timing advance into account 8 POWer floating point real number representing the mobile s RF output power level in dBm 9 TEMPlate boolean numb...

Page 620: ...imes The measurement results will be stored internally and read by the FETC command An example of the string returned is 6 33 8 53 11 97 9 41 10 79 Syntax FETCh EGPRs RFTX ENFTh Parameters There are no parameters Description There is solely a query form of this command available Query The query form of this command returns the latest measurement result value s of the MEAS EGPR ARR RFTX ENFT measur...

Page 621: ...umber with the physical dimension of microseconds Example MEAS EGPRs RFTX LENGth FETCh EGPRs RFTX LENG The value returned in this example is 557 0 Syntax FETCh EGPRs RFTX UTIMe Parameters There are no parameters Description There is solely a query form of this command available Query The query form of this command returns the latest measurement result value s of the MEAS EGPRs ARRay RFTX UTIMe mea...

Page 622: ...st did violate the PTT The PTT is user definable and can be set using the CALC EGPRs RFTX TEMP commands Example MEAS EGPRs ARR RFTX TEMPlate 10 FETCh EGPRs RFTX TEMP The values returned in this example are 0 0 0 0 0 0 0 0 0 0 This means that all the ten bursts checked were within the PTT Syntax FETCh EGPRs RFTX CORNer Parameters There are no parameters Description There is solely a query form of t...

Page 623: ...easurement For further details regarding this measure ment please refer to the description of the MEAS EGPRs BLOC MSP command and the explanations given in section MEASure BLOCkdata There you will also find all information about the number type and order of the measurement result val ues returned in the result string Example MEAS EGPRs BLOC MSP FETC EGPRs BLOC MSP The FETC command will return a da...

Page 624: ...P ACPM TRANsient Parameters There are no parameters Description There is solely a query form of this command available Query The query form of this command returns the latest data array for the measurement of the ACPM spectrum due to switching transients The string returned contains a multi ple of 27 floating point real numbers separated by commas For further details regarding this measurement ple...

Page 625: ...s available Query Returns int1 times the number of active uplink slots followed by 23 float values per time slot int1 is the number of measurements defined in the respective MEAS EGPRs ARRay command For the meaning of the 23 float values per slot see MEAS EGPRs ACPM MODulation Example CONF EGPRs MSTA MSL 2 MEAS EGPRs ARR MULT RFSP ACPM MOD 3 FETCh EGPRs MULT RFSP ACPM MOD Syntax FETCh EGPRs MULTIs...

Page 626: ...ues separated by commas The type of the measurement result values i e floating point real numbers integers or boolean num bers depends on the measurements specified The order of the measurement result values within the string is as described below for the FETCh EGPRs RFTX ALL command Example CONF EGPR MEAS GRO RFTX POW ERMS MEAS EGPR RFTX GRO FETC EGPR RFTX GRO In this example the group of measure...

Page 627: ...g the timing error of the mobile under test in microseconds taking the ordered timing advance into account 8 POWer floating point real number representing the mobile s RF output power level in dBm 9 TEMPlate boolean number 0 indicates that the power time template PTT was not violated by the last burst measured while a 1 means that the burst did violate the PTT 10 17 CORNer eight floating point rea...

Page 628: ...ilable Query The query form of this command returns the latest measurement result value s of the MEAS EGPR ARR RFTX ENFT measurement The string delivered back will contain at least one floating point real number with the physical dimension of Example MEAS EGPR ARR RFTX ENFT 5 FETC EGPR RFTX ENFT The maximum error vector magnitude measurement will be performed five times The measurement results wil...

Page 629: ...ers There are no parameters Description There is solely a query form of this command available Query The query form of this command returns the latest measurement result value s of the MEAS EGPRs ARRay RFTX UTIMe measurement The string delivered back will contain at least one floating point real number with the physical dimension of microseconds Example MEAS EGPRs ARR RFTX UTIMe 5 FETCh EGPRs RFTX...

Page 630: ...the PTT The PTT is user definable and can be set using the CALC EGPRs RFTX TEMP commands Example MEAS EGPRs ARR RFTX TEMPlate 10 FETCh EGPRs RFTX TEMP The values returned in this example are 0 0 0 0 0 0 0 0 0 0 This means that all the ten bursts checked were within the PTT Syntax FETCh EGPRs RFTX CORNer Parameters There are no parameters Description There is solely a query form of this command ava...

Page 631: ...graph of the modulation spectrum measurement For further details regarding this measure ment please refer to the description of the MEAS EGPRs BLOC MSP command and the explanations given in section MEASure BLOCkdata There you will also find all information about the number type and order of the measurement result val ues returned in the result string Example MEAS EGPRs BLOC MSP FETC EGPRs BLOC MSP...

Page 632: ...trum ACPM MOD FETC EGPRs RFSP ACPM MOD The FETC command will return a data array containing 24 floating point real num bers the power reference value and 23 values as in ACPM MOD Syntax FETCh EGPRs RFSP ACPM TRANsient Parameters There are no parameters Description There is solely a query form of this command available Query The query form of this command returns the latest data array for the measu...

Page 633: ... 0 1 0 0 2 0 0 0 1 0 In this example the signal hit the limits during the transition period in the second measurement and during the active part of the second slot in the third measurement Syntax FETCh EGPRs MULTIslot RFSPectrum ACPM MODulation Parameters There are no parameters with this command Description Only the query form of this command is available Query Returns int1 times the number of ac...

Page 634: ...rement runs The average measurement result value of those ten measurement runs will then be calculated and returned by the CALC MAV query see below for details regarding this command Syntax CALCulate LIMit FAIL LAST Parameters There are no parameters Description There is solely a query form of this command available Query Checks whether the result s of the last measurement performed did violate th...

Page 635: ...le the CALC LIM FAIL CUM command is used to check whether there has been any violation of the PTT since the start of the MEAS GSM RFTX TEMP measurement Syntax CALCulate LIMit FAIL RESet Parameters There are no parameters Description This command resets the cumulative process as explained above see description of command CALC LIM FAIL CUM for details Query There is no query form of this command ava...

Page 636: ...alues will always have the format of floating point real numbers and will be separated by commas Example MEAS AFAN SIN CALC RES other SCPI commands CALCulate MMIN In this example first a continuous SINAD measurement is started After some time the CALC MMIN command is used to read out the minimum SINAD measured The string returned in this example is 42 6 Syntax CALCulate MMAXimum Parameters There a...

Page 637: ...e mean frequency error and its standard deviation The string returned in this example is 22 1 3 4 Syntax CALCulate GSM RFTX MAVerage Parameters There are no parameters Description There is solely a query form of this command available Query Calculates and returns the average measurement result value of the TX measurement started last The string delivered back will contain as many average values as...

Page 638: ...one the mobile s mini mum RF output power Syntax CALCulate GSM RFTX MMAXimum Parameters There are no parameters Description There is solely a query form of this command available Query Returns the maximum measurement result value of the TX measurement started last The string delivered back will contain as many maximum values as measurement types performed The single maximum values will always have...

Page 639: ...number within the string returned indicates the result of the limit check for the following measurements 1 peak phase error measurement 2 root mean square phase error measurement 3 measurement of the mobile s frequency error 4 measurement of the burst lenght 5 timing error measurement 6 measurement of the mobile s RF output power level 7 check of the burst against the PTT 8 15 measurement of RF po...

Page 640: ...ons ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS GSM RFTX PPEAk measurement against their user definable limits either on or off Query There is no query form of this command available Example CALC GSM RFTX PPEAk LIM STAT OFF Switches the limit check for the peak phase error measurement off Syntax CALCulate GSM RFTX PPEAk LIMit UPPer ...

Page 641: ...X PRMS 10 CALC GSM RFTX PRMS LIM String returned 0 This string delivered back indicates that there was no violation of the measurement limits Syntax CALCulate GSM RFTX PRMS LIMit STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS GSM RFTX PRMS measurement a...

Page 642: ...orm of this command available Query This command delivers one boolean number indicating whether the user definable limits of the frequency error measurement were violated by a measurement result value or not A 0 means that all measurement result values were within the limits set while a 1 indicates that at least one measurement result value did violate at least one of the limits The limits can be ...

Page 643: ...esolution possible is 1 0 the default value is 90 0 Description Sets the lower limit of the frequency error for measurements in asynchronous mode the physical dimension of the number stated is Hertz Query There is no query form of this command available Example CALC GSM RFTX FREQ LIM LOW 60 8 Sets the lower limit of the frequency error measurement result to 60 8 Hz Syntax CALCulate GSM RFTX FREQue...

Page 644: ...ted is Hertz Query There is no query form of this command available Example CALC GSM RFTX FREQ LIM PCS 120 Sets the lower limit of the frequency error measurement result on GSM 1900 chan nels to 120 Hz and the upper limit to 120 Hz Syntax CALCulate GSM RFTX LENGth LIMit FAIL Parameters There are no parameters Description There is solely a query form of this command available Query This command del...

Page 645: ...l1 Parameters real1 is a floating point real number The minimum value is 0 0 the maximum is 700 0 The minimum resolution possible is 0 1 the default value is 542 8 Description Sets the lower limit of the burst length measurement the physical dimension of the number stated is microseconds Query There is no query form of this command available Example CALC GSM RFTX LENG LIM LOW 541 9 Sets the lower ...

Page 646: ... the default value is 3 Description Sets the upper limit of the UL timing error measurement the physical dimension of the number stated is microseconds Note The UL timing error measurement takes the ordered timing advance into account Query There is no query form of this command available Example CALC GSM RFTX UTIM LIM UPP 5 Sets the upper limit of the uplink timing error measurement result to 5 0...

Page 647: ...itches the check of the measurement result values of the MEAS GSM RFTX POWer measurement against their user definable limits either on or off Query There is no query form of this command available Example CALC GSM RFTX POW LIM STAT ON Switches the limit check for the RF output power level measurement on Syntax CALCulate GSM RFTX POWer LIMit UPPer DATA real1 Parameters real1 is a floating point rea...

Page 648: ...available Example CALC GSM RFTX POW LIM GSM 2 3 3 3 3 3 3 3 3 3 3 3 3 3 5 5 5 5 Sets the lower and upper limits of the power measurement result on GSM 900 and GSM 850 channels to 2 3 3 3 3 3 3 3 3 3 3 3 3 3 5 5 5 5 dB around the nom inal level Syntax CALCulate GSM RFTX POWer LIMit PCN real1 real2 real19 Parameters real1 through real19 are floating point real numbers The minimum value is 0 0 the ma...

Page 649: ... 3 3 3 3 4 4 4 4 5 5 dB around the nominal level Syntax CALCulate GSM RFTX TEMPlate NORMal LIMit FAIL Parameters There are no parameters Description There is solely a query form of this command available Query This command delivers 14 boolean numbers indicating whether the PTT limits for a normal burst were violated or not A 0 on a position means that there was no violation of the limits while a 1...

Page 650: ...FTX TEMP LIM LOW commands for further details Query There is no query form of this command available Example CALC GSM RFTX TEMP LIM AUTO ON Switches the limit check for the burst shape to use the standard PTTs as defined by ETSI standards Syntax CALCulate GSM RFTX TEMPlate NORMal LIMit STATe Pre defExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Descrip...

Page 651: ...alues are for real0p 59 0 for real1p 59 0 for real2p 30 0 for real3p 6 0 for real4p 4 0 for real5p 1 0 for real6p 6 0 for real7p 30 0 for real8p 59 0 Description Sets the upper limits for the user definable PTT for normal bursts The upper limits of the user defined PTT are made up by nine pairs of position in microseconds rela tive to the beginning of the burst and the related RF power level in dB...

Page 652: ...arding the user definable PTT refer to section Power Time Tem plates PTT Query The query form of this command is not available Example CALC GSM RFTX TEMP LIM LOW 41 150 0 150 0 40 20 1 270 1 543 1 543 150 Syntax CALCulate GSM RFTX TEMPlate RACH LIMit FAIL Parameters There are no parameters Description There is solely a query form of this command available Query This command delivers 14 boolean num...

Page 653: ...ltek 4400 will use the manually set limits instead see description of the CALC GSM RFTX TEMP RACH LIM UPP and CALC GSM RFTX TEMP RACH LIM LOW commands for further details Query There is on query form to this commmand Example CALC GSM RFTX TEMP RACH LIM AUTO ON Switches the limit check for the shape of random access bursts to use the standard PTTs as defined by GSM ETSI Syntax CALCulate GSM RFTX TE...

Page 654: ... are for real0p 59 0 for real1p 59 0 for real2p 30 0 for real3p 6 0 for real4p 4 0 for real5p 1 0 for real6p 6 0 for real7p 30 0 for real8p 59 0 Description Sets the upper limits for the user definable PTT for random access bursts The upper limits of the user defined PTT are made up by nine pairs of position in microseconds relative to the beginning of the burst and the related RF power level in d...

Page 655: ...pairs of position in microseconds relative to the beginning of the burst and the related RF power level in dB relative to the power level during the active part of the burst For further details regarding the user definable PTT refer to section Power Time Tem plates PTT Query The query form of this command is not supported Example CALC GSM RFTX TEMP RACH LIM LOW 41 150 0 150 0 40 20 1 270 1 321 1 3...

Page 656: ...ts set with the CALC GSM RFTX CORN NORM POS command as described above Please refer to section Corner Points for further details Example MEAS GSM ARR CORN 10 CALC GSM RFTX CORN LIM FAIL String returned in this example 0 0 1 0 0 0 0 0 This string indicates that the limits set for corner point 3 were violated Syntax CALCulate GSM RFTX CORNer NORMal LIMit STATe PredefExp Parameters PredefExp is one o...

Page 657: ...its at the eight user definable corner points for normal bursts The single data values are dB relative to the power level during the active part of the burst Query There is no query form to this command Example CALC GSM RFTX CORN LIM LOW 150 150 150 150 150 150 150 150 Syntax CALCulate GSM RFTX CORNer RACH POSition real1 real2 real3 real4 real5 real6 real7 real8 Parameters realx are floating point...

Page 658: ...0 0 0 0 0 0 This string indicates that one of the two limits set for corner point 2 was violated Syntax CALCulate GSM RFTX CORN RACH LIMit STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the bursts against the limits at the corner points either on or off for random access bursts Query There is n...

Page 659: ... 150 150 150 150 150 Syntax CALCulate GSM RFRX MAVerage Parameters There are no parameters Description There is solely a query form of this command available Query Calculates and returns the average measurement result value of the RX measurement started last The string delivered back will contain as many average values as mea surement types performed The single average values will always have the ...

Page 660: ... GSM RFRX MSIGma Parameters There are no parameters Description There is solely a query form of this command available Query Returns the mean value and the standard deviation of the RX measurement last started The string delivered back contains as many pairs of mean and standard devi ation values as measurement types performed The individual values all have the for mat of floating point real numbe...

Page 661: ... was a violation of at least one limit of the frame erasure measurement Syntax CALCulate GSM RFRX RBER ALL LIMit STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS GSM RFRX RBER ALL measurement against their user definable limits either on or off Query Ther...

Page 662: ...al2 represents the lower limit of the bit error ratio measurement of the class II bits while real3 represents the lower limit of the frame erasure ratio measurement Query The query form of this command is not available Example CALC GSM RFRX RBER ALL LIM LOW 0 0 0 Sets the lower limits for RBER class Ia bits RBER class II bits and FER to 0 0 Syntax CALCulate GSM RFRX RBER CIB LIMit FAIL Parameters ...

Page 663: ...al number The minimum value is 0 0 the maximum is 100 0 The minimum resolution possible is 0 1 the default value is 2 5 Description Sets the upper limit for the residual bit error ratio measurement of the class Ib bits Query The query form of this command is not available Example CALC GSM RFRX RBER CIB LIM UPP 5 Sets the upper limit for the class I bit error rate results to 5 0 Syntax CALCulate GS...

Page 664: ...ommand switches the check of the measurement result values of the MEAS GSM RFRX RBER CII measurement against their user definable limits either on or off Query There is no query form of this command available Example CALC GSM RFRX RBER CII LIM STAT ON Switches the limit check of the residual bit error ratio measurement for the class II bits on Syntax CALCulate GSM RFRX RBER CII LIMit UPPer DATA re...

Page 665: ... CALC GSM RFRX RBER FER LIM String returned 0 This means that the frame erasure ratio was within the limits set with the commands explained in this section Syntax CALC GSM RFRX RBER FER LIMit STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS GSM RFRX RBER ...

Page 666: ... back on any position means that the related test was passed without exceeding the limits a 1 indicates that at least one of the limits was violated by the measurement result value The position of the boolean number within the string returned indicates the result of the check for the following measurements 1 the bit error ratio measurement of the class Ia bits 2 the bit error ratio measurement of ...

Page 667: ...pper limit of the bit error ratio measurement for the class II bits Query The query form of this command is not supported Example CALC GSM RFRX BER ALL LIM UPP 1 2 2 8 Sets the upper limit of the BER measurements to 1 0 for class Ia bits 2 0 for class Ib bits and 2 8 for class II bits Syntax CALCulate GSM RFRX BER ALL LIMit LOWer DATA real1 real2 real3 Parameters realx are three floating point rea...

Page 668: ...or the class Ia bits was outside the lim its set with the commands explained in this section Syntax CALCulate GSM RFRX BER CIA LIMit STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS GSM RFRX BER CIA measurement against their user definable limits either o...

Page 669: ...command delivers one boolean number indicating whether the result value of the nonresidual bit error ratio measurement of the class Ib bits did violate the user definable test limits While a 0 delivered back means that the related test was passed without exceeding the limits a 1 indicates that at least one limit was violated by the measurement result value Example MEAS GSM RFRX BER CIB CALC GSM RF...

Page 670: ... is 100 0 The minimum resolution possible is 0 1 the default value is 0 0 Description Sets the lower limit for the nonresidual bit error ratio measurement of the class Ib bits Query The query form of this command is not supported Example CALC GSM RFRX BER CIB LIM LOW 0 Sets the lower limit for class Ib bits to 0 Syntax CALCulate GSM RFRX BER CII LIMit FAIL Parameters There are no parameters Descri...

Page 671: ...DATA real1 Parameters real1 is a floating point real number The minimum value is 0 0 the maximum is 100 0 The minimum resolution possible is 0 1 the default value is 2 5 Description Sets the upper limit for the nonresidual bit error ratio measurement of the class II bits Query The query form of this command is not supported Example CALC GSM RFRX BER CII LIM UPP 7 5 Sets the upper limit of the clas...

Page 672: ...edefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS GSM RFRX BER CII measurement against their user definable limits either ON or OFF Query There is no query form of this command available Example CALC GSM RFRX BER CRC LIM STAT ON Switches the limit check of the non residual bit error r...

Page 673: ... 1 indicates that at least one limit was violated by the mea surement result value Note For further details regarding the fast BER measurement please refer to section FBER live display Example MEAS GSM RFRX FBER CALC GSM RFRX FBER LIM String returned 1 This means that the fast bit error ratio measured was outside the limits set with the commands explained in this section Syntax CALCulate GSM RFRX ...

Page 674: ...easurement results to 0 Syntax CALCulate GSM RFSPectrum ACPM MAVerage Parameters There are no parameters Description There is solely a query form of this command available Query Calculates and returns the average measurement result value of the ACPM measure ment started last The string delivered back will contain as many average values as measurement types performed The single average values will ...

Page 675: ...by commas Example CALC RES MEAS GSM ARR RFSP ACPM MOD CALC RFSP ACPM MMAX Syntax CALCulate GSM RFSPectrum ACPM MSIGma Parameters There are no parameters Description There is solely a query form of this command available Query Returns the mean value and the standard deviation of the RF spectrum measure ment In the case of the ACP Mod measurement the string delivered back contains 27 pairs of mean v...

Page 676: ...om the carrier as well as on all multiples of 200 kHz offset from the carrier up to and including an offset of 1 8 MHz If one includes the carrier frequency as well 0 0 dBc this adds up to the 23 measurement values returned All measurements will be performed with a measuring bandwidth of 30 kHz Example MEAS GSM BLOC MSP AVG 20 CALC GSM RFSP ACPM MOD LIM String returned 0 0 0 0 0 0 0 0 1 0 0 0 0 0 ...

Page 677: ... 65 Sets the upper limits of the ACP modulation spectrum to these values The first value applies to 1 6 MHz the twelfth value to the carrier frequency and the 23rd value to a 1 6 MHz offset Syntax CALC GSM RFSPectrum ACPM MODulation LIMit LOWer DATA real1 real2 real3 real4 real5 real6 real7 real8 real9 real10 real11 real12 real13 real14 real15 real16 real17 real18 real19 real20 real21 real22 real2...

Page 678: ...the measurement result value Note According to GSM specification 05 05 this measurement will be performed on 0 400 600 1 200 and 1 800 kHz offset from the carrier All measure ments will be performed with a measuring bandwidth of 30 kHz For additional infor mation also the measurement values of the 30 kHz windows below and above the frequencies specified by GSM standard 05 05 will be taken into acc...

Page 679: ...r limits The string returned will contain 27 floating point real numbers separated by commas in the order and meaning as explained above Example CALC GSM RFSP ACPM TRAN LIM UPP This command will return the 27 upper limit values Syntax CALC GSM RFSP ACPM TRAN LIMit LOWer DATA real1 real2 real3 real4 real5 real6 real7 real8 real9 real10 real11 real12 real13 real14 real15 real16 real17 real18 real19 ...

Page 680: ... a measurement it is an interpolation of the spectrum curve for the frequency specified Example MEAS BLOC MSP AVG 20 CALC GPRS RFSP MSP VAL 50000 This command will interpolate a modulation spectrum measurement at an offset of 50 kHz to the carrier The value returned in this example is 4 7 Syntax CALCulate GSM RFSPectrum MSPectrum MAXPeak Parameters There are no parameters Description There is only...

Page 681: ...his command available Query Returns the minimum measurement result value of the Audio measurement started last The string delivered back will contain as many minimum values as measurement types performed The single minimum values will always have the format of floating point real numbers and will be separated by commas Example CALC RES MEAS ARR AFAN ALL CALC AFAN MMIN Syntax CALCulate AFANalyser M...

Page 682: ... of the MEAS AFAN ALL measurement did violate their individual limits set with the commands explained below or not The position of the boolean number within the string returned indicates the result of the check of following measurements 1 the peak to peak measurement of the AC voltage 2 the root mean square value of the AC voltage 3 the RMS valued AC ripple on a DC voltage 4 the audio frequency me...

Page 683: ...n audio frequency measurements with one com mand The order of the floating point real numbers defines their meaning real1 represents the upper limit of the peak to peak AC voltage measurement the physical dimension of the number stated is V pp real2 represents the upper limit of the RMS valued AC voltage measurement the physical dimension of the number stated is V rms real3 represents the upper li...

Page 684: ... physical dimension of the number stated is V pp real2 represents the lower limit of the RMS valued AC voltage measurement the physical dimension of the number stated is V rms real3 represents the lower limit of the RMS valued measurement of an AC voltage ripple on a DC voltage the physical dimension of the number stated is V rms real4 represents the lower limit of the audio frequency measurement ...

Page 685: ...ak to peak AC voltage measurement on Syntax CALCulate AFANalyser ACVoltage PEAKp LIMit UPPer DATA real1 Parameters real1 is a floating point real number The minimum value is 0 0 the maximum is 30 0 The minimum resolution possible is 0 0001 the default value is 5 0 Description Sets the upper limit for the peak to peak measurement of the AC voltage applied to the audio analyzer The physical dimensio...

Page 686: ...String returned 0 This string delivered back indicates that there was no violation of the limits set Syntax CALCulate AFANalyser ACVoltage RMS LIMit STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS AFAN ACV RMS measurement against their user definable lim...

Page 687: ... a query form of this command available Query This command delivers one boolean number indicating whether the user definable limits of the RMS valued measurement of the AC ripple on a DC voltage were vio lated by a measurement result value or not A 0 means that the measurement result value is within the limits set while a 1 indi cates that at least one measurement result value did violate at least...

Page 688: ... value is 40 0 the maximum is 40 0 The minimum resolution possible is 0 0001 the default value is 5 0 Description Sets the lower limit for the RMS valued measurement of the AC voltage component on a DC voltage applied to the audio analyzer The physical dimension of the number stated is V rms Query The query form of this command is not supported Example CALC AFAN DCV LIM LOW 1 75 Sets the upper lim...

Page 689: ...t UPPer DATA real1 Parameters real1 is a floating point real number The minimum value is 0 0 the maximum is 20 000 0 The minimum resolution possible is 1 0 the default value is 5 000 0 Description Sets the upper limit for the AF frequency measurement The physical dimension of the number stated is Hertz Query The query form of this command is not available Example CALC AFAN FREQ LIM UPP 10000 Sets ...

Page 690: ... This string delivered back indicates that there was a violation of the limits set Syntax CALCulate AFANalyser DISTortion LIMit STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS AFAN DIST measurement against their user definable limits either on or off Que...

Page 691: ...re no parameters Description There is solely a query form of this command available Query This command delivers one boolean number indicating whether the user definable limits of the SINAD measurement were violated by a measurement result value or not A 0 means that all measurement result values were within the limits set while a 1 indicates that at least one measurement result value did violate a...

Page 692: ... SINad LIMit LOWer DATA real1 Parameters real1 is a floating point real number The minimum value is 0 0 the maximum is 100 0 The minimum resolution possible is 0 1 the default value is 0 0 Description Sets the lower limit for the SINAD measurement The physical dimension of the num ber stated is dB Query The query form of this command is not available Example CALC AFAN SIN LIM LOW 30 Sets the lower...

Page 693: ... string1 is a string giving the name of the file containing the audio limits The maximum length of string1 is 50 characters The default for string1 is example lmt Description This command loads the audio template description file Please note that the data contained in the file need to be activated using the CALC AFSP TEMP LIM STAT ON command described above before the tem plate will have any effec...

Page 694: ...ency real1 real2 real3 real4 real5 real6 real7 real8 real9 real10 Parameters real1 through realxp are floating point real numbers The minimum value for all numbers is 0 0 the maximum value 20000 0 The min imum resolution possible for all realxt is 0 1 The default values are for real0t 41 0 for real1t 28 0 for real2t 18 0 for real3t 10 0 for real4t 0 0 for real5t 553 0 for real6t 561 0 for real7t 5...

Page 695: ...trum TEMPlate LIMit LOWer real1 real2 real3 real4 real5 real6 real7 real8 real9 real10 Parameters The realx values are floating point real numbers The minimum value is 120 the maximum value is 10 The resolution for all values is 0 1 The values are the lower limits for the audio template in dB relative to the reference level Description Sets the lower limits for the user definable audio spectrum te...

Page 696: ...d the measurement result value The values returned in this example is 1230 0 5 2 Syntax CALCulate PSUPply MAVerage Parameters There are no parameters Description There is solely a query form of this command available Query Calculates and returns the average measurement result value of the current mea surement started last The string delivered back will contain as many average values as measurement...

Page 697: ...ll be separated by commas Example CALC RES MEAS ARR PSUP ALL CALC PSUP MMAX Returns the maximum values for average power consumption in mW average cur rent consumption in mA and peak current consumption in mA Syntax CALCulate PSUPply MSIGma Parameters There are no parameters Description There is solely a query form of this command available Query Returns the mean value and the standard deviation o...

Page 698: ...efExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS PSUP ALL measurement against their user definable limits either on or off Query There is no query form of this command available Example CALC PSUP ALL LIM STAT ON Switches the limit check for the current measurements on Syntax CALCulate ...

Page 699: ...ivers one boolean number indicating whether the user definable limits of the average power consumption measurement were violated by a measure ment result value or not A 0 means that all measurement result values were within the limits set while a 1 indicates that at least one measurement result value did violate at least one of the limits The limits can be set using the commands described below Ex...

Page 700: ...e resolution is 1 the default value is 2000 0 Description Sets the lower limit for the power consumption measurement The physical dimension of the number stated is mW Query The query form of this command is not available Example CALC PSUP APOW LIM LOW 10 Sets the lower limit of the power consumption measurement to 10 mW Syntax CALCulate PSUPply ACURrent LIMit STATe PredefExp Parameters PredefExp i...

Page 701: ...f this command is not available Example CALC PSUP ACUR LIM LOW 10 Sets the lower limit of the current consumption measurement to 10 mA Syntax CALCulate PSUPply PCURrent LIMit FAIL Parameters There are no parameters Description There is solely a query form of this command available Query This command delivers one boolean number indicating whether the user definable limits of the peak current measur...

Page 702: ... The minimum value is 0 0 the maxi mum is 4000 0 The resolution is 1 the default value is 4000 0 Description Sets the upper limit for the peak current consumption measurement The physical dimension of the number stated is mA Query There is no query form of this command available Example CALC PSUP PCUR LIM UPP 1000 0 Sets the upper limit of the peak current consumption measurement to 1000 mA Syntax...

Page 703: ...GSM RFTX CORN RACH LIMit STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the bursts against the limits at the corner points either on or off for random access bursts Query There is no query form of this command available Example CALC GPRS RFTX CORN RACH LIM STAT OFF Switches the limit check at t...

Page 704: ...s the average measurement result value of the TX measurement started last The string delivered back will contain as many average values as mea surement types performed The single average values will always have the format of floating point real numbers and will be separated by commas Example CONF EGPR MEAS GRO RFTX POW ERMS CALC RES MEAS EGPR ARR RFTX GRO 20 CALC EGPR RFTX MAV In this example firs...

Page 705: ...rated by commas Example CONF EGPR MEAS GRO RFTX POW ERMS CALC RES MEAS EGPR ARR RFTX GRO 20 CALC EGPR RFTX MMAX In this example first the group of measurements is defined by a power measurement combined with a EVM RMS phase error measurement This group of measurements is performed 20 times After that the single measurement result values will be averaged and returned The values returned in this exa...

Page 706: ...e check of the measurement result values of the MEAS EGPRs RFTX ERMS measurement against their user definable limits either on or off Query There is no query form of this command available Example CALC EGPR RFTX ERMS LIM STAT ON Switches the limit check for the error vector magnitude rms averaged measurement on Syntax CALCulate EGPRs RFTX ERMS LIMit UPPer DATA real1 Parameters real1 is a floating ...

Page 707: ...ack indicates that there was no violation of the measurement limits Syntax CALCulate EGPRs RFTX EPEAk LIMit STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS EGPRs RFTX EPEA measurement against their user definable limits either on or off Query There is no...

Page 708: ...ble limits of the error vector magnitude that is not exceede by 95 of the symbols of a burst were violated by a measurement result value or not A 0 means that all measurement result values were within the limits set while a 1 indicates that at least one measurement result value did violate at least one of the limits The limits can be set using the commands described below Example MEAS EGPR ARR RFT...

Page 709: ... The resolution is 0 1 and the default value is 0 Description Sets the lower limit of the error vector magnitude that is not exceeded by 95 of the symbols of a burst measurement the physical dimension of the number stated is Query There is no query form of this command available Example CALC EGPR RFTX ENFT LIM LOW 1 1 Sets the lower limit of the error vector magnitude that is not exceede by 95 of ...

Page 710: ...each is 120 the maximum is 0 The resolution is 0 1 and the default value is 30 Description Sets the upper limit of the error vector magnitude origin offset measurement the physical dimension of the number stated is dBc Query There is no query form of this command available Example CALC EGPR RFTX EOFF LIM UPP 10 Sets the upper limit of the error vector magnitude origin offset measurement result to ...

Page 711: ...ing predefined expressions ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS EGPRs RFTX FREQuency measurement against their user definable limits either ON or OFF Query There is no query form of this command available Example CALC EGPR RFTX FREQuency LIM STAT ON Switches the limit check on frequency measurements on Syntax CALCulate EGPRs ...

Page 712: ...RFTX FREQuency LIMit PCN real1 Parameters real1 is a floating point real number The minimum value for each is 0 the maxi mum is 100000 The resolution is 1 and the default value is 180 Description Sets the symmetrical limits of the frequency error for measurements in synchronous call mode for GSM 1800 also known as DCS 1800 or PCN the physical dimension of the number stated is Hertz Query There is ...

Page 713: ...ing returned in this example 0 This string indicates that there was no violation of the measurement limits Syntax CALCulate EGPRs RFTX LENGth LIMit STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS EGPRs RFTX LENGth measurement against their user definable...

Page 714: ... the user definable limits of the UL timing error measurement were violated by a measurement result value or not A 0 means that all measurement result values were within the limits set while a 1 indicates that at least one measurement result value did violate at least one of the limits The limits can be set using the commands described below Example MEAS EGPR ARR RFTX UTIM 10 CALC EGPR RFTX UTIM L...

Page 715: ...e CALC EGPR RFTX UTIM LIM LOW 5 Sets the lower limit of the uplink error timing measurement to 5 μs Syntax CALCulate EGPRS RFTX POWer LIMit FAIL Parameters There are no parameters Description There is solely a query form of this command available Query This command delivers one boolean number indicating whether the user definable limits of the measurement of the mobile s RF output power level were...

Page 716: ... default value is 2 Description Sets the lower limit for the mobile s RF output power level the physical dimension of the number stated is dBm Query There is only a command form available Example CALC EGPR RFTX POW LIM LOW 45 Sets the lower limit of the peak power measurement to 13 dBm Syntax CALCulate EGPRs RFTX POWer LIMit GSM real1 real2 real18 Parameters real1 thru real18 are floating point re...

Page 717: ...limits of the power level measurement result on GSM 1800 channels to 2 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 5 5 dB around the nominal level Syntax CALCulate EGPRs RFTX POWer LIMit PCS real1 real2 real18 Parameters real1 through real18 are floating point real numbers The minimum value for each is 0 the maximum is 30 and the resolution is 0 1 The default values are 2 2 3 3 3 3 3 3 3 3 3 4 4 4 4 4 5 5 res...

Page 718: ...e EGPRs RFTX TEMPlate NORMal LIMit AUTO PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command selects the power time template to check normal bursts against Auto mode parameter ON means that the Willtek 4400 will use the appropriate PTT as defined in the GSM ETSI standards Those PTTs vary with the frequency range and the RF powe...

Page 719: ...53 0 for real9t 561 0 for real10t 571 0 for real11t 580 0 The minimum value for realxp is 150 0 the maximum value 5 0 The mini mum resolution possible for realxp is 0 1 The default values are for real0p 59 0 for real1p 59 0 for real2p 30 0 for real3p 6 0 for real4p 4 0 for real5p 2 4 for real6p 4 0 for real7p 2 4 for real8p 4 0 for real9p 6 0 for real10p 30 0 for real11p 59 0 Description Sets the ...

Page 720: ...580 0 The minimum value for realxp is 150 0 the maximum value 5 0 The mini mum resolution possible for all realxp is 0 1 The default values are for real0p 150 0 for real1p 150 0 for real2p 2 0 for real3p 0 0 for real4p 20 0 for real5p 0 0 for real6p 2 0 for real7p 150 0 Description Sets the lower limits for the user definable PTT for normal bursts The lower limits of the user defined PTT are made ...

Page 721: ...here are no parameters Description There is solely a query form of this command available Query This command delivers eight boolean numbers indicating whether the limits for the eight corner positions of normal bursts were violated by the bursts received or not A 0 on a position means that there was no violation of the limits while a 1 indicates that at least one measurement result did violate the...

Page 722: ...re dB relative to the power level during the active part of the burst For further details please refer to section Corner Points Query There is no query form to this command Example CALC EGPR RFTX CORN LIM UPP 4 4 4 4 4 4 4 4 Syntax CALCulate EGPRs RFTX CORNer NORMal LIMit LOWer DATA real1 real2 real3 real4 real5 real6 real7 real8 Parameters realx stands for floating point real numbers The minimum ...

Page 723: ...asurement result value of the ACPM measurement started last The string delivered back will contain as many minimum values as measurement types performed The single minimum values will always have the format of floating point real numbers and will be separated by commas Example CALC RES MEAS EGPR ARR RFSP ACPM MOD CALC EGPRs RFSP ACPM MMIN Syntax CALCulate EGPRs RFSPectrum ACPM MMAXimum Parameters ...

Page 724: ...elow Every boolean number represents the result of the limit check for one of the 27 measurement result values The first value will give the result of the limit check at 1 83 MHz offset to the carrier the second one for 1 80 MHz offset to the carrier and so on While a 0 delivered on any position means that the related measurement result value did not exceed the limits a 1 indicates that at least o...

Page 725: ...l22 real23 Parameters realx are 23 floating point real numbers The minimum value for all realx is 100 0 the maximum value 10 0 The minimum resolution possible for all realx is 0 01 The default values are 60 0 for real1 real8 33 0 for real9 30 0 for real10 0 5 for real11 0 5 for real12 0 5 for real13 30 0 for real14 33 0 for real15 and 60 0 for real16 real23 Description Sets the upper limits for th...

Page 726: ...nt to zero for all 23 measured frequencies Syntax CALCulate EGPRs RFSPectrum ACPM TRAN sient LIMit FAIL Parameters There are no parameters Description There is solely a query form of this command available Query This command delivers 27 boolean numbers in a string separated by commas These numbers indicate whether the 27 measurement result values of the MEAS EGPRs RFSP ACPM TRAN measurement did vi...

Page 727: ...inst their user definable limits either ON or OFF Query The query form of this command is not available Example CALC EGPR RFSP ACPM TRAN LIM STAT ON Switches the limit check of the ACPM of the spectrum due to switching transients on Syntax CALCulate EGPRs RFSPectrum ACPM TRANsient LIMit UPPer DATA real1 real2 real3 real4 real5 real6 real7 real8 real9 real10 real11 real12 real13 real14 real15 real1...

Page 728: ...mit values Syntax CALCulate EGPRs RFSPectrum MSPectrum VALue real1 Parameters real1 is a floating point real number The minimum value is 1 000 000 0 the maximum is 1 000 000 0 The minimum resolution possible is 0 1 the default value is 200 0 Description There is only a query form of this command available Query The query form of this command delivers an interpolated measurement result value of the...

Page 729: ...it is an readout of the spectrum curve Example MEAS EGPR BLOC MSP AVG 20 CALC EGPR RFSP MSP MAXP This command will read at the modulation spectrum measurement maximum the fre quency offset to the carrier and the measurement result value The values returned in this example is 67700 0 5 2 Syntax CALC GPRS RFTX CORNer RACH LIMit FAIL Parameters There are no parameters Description There is solely a qu...

Page 730: ...he minimum resolution possible for all realx is 0 01 The default value is 4 0 for all realx Description Sets the upper limits at the eight user definable corner points for random access bursts The single data values are dB relative to the power level during the active part of the burst For further details please refer to section Corner Points Query There is no query form to this command Example CA...

Page 731: ...This group of measurements is performed 20 times After that the single measurement result values will be averaged and returned The values returned in this example are 4 53 5 98 Syntax CALCulate EGPRs RFTX MMINimum Parameters There are no parameters Description There is solely a query form of this command available Query Returns the minimum measurement result value of the TX measurement started las...

Page 732: ...erformed 20 times After that the single measurement result values will be averaged and returned The values returned in this example are 6 53 15 98 Syntax CALCulate EGPRs RFTX MSIGma Parameters There are no parameters Description There is solely a query form of this command available Query Returns the mean value and the standard deviation of the TX measurement last started The string delivered back...

Page 733: ... timing error measurement 8 measurement of the mobile s RF output power level Example MEAS EGPR RFTX ALL CALC EGPR RFTX ALL LIM String returned in this example 0 0 0 0 0 0 0 1 1 on position 8 indicates that the mobile s RF power level violated its test limits Syntax CALCulate EGPRs RFTX ALL LIMit STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ...

Page 734: ...s on Syntax CALCulate EGPRs RFTX ERMS LIMit UPPer DATA real1 Parameters real1 is a floating point real number The minimum value for each is 0 the maxi mum is 500 The resolution is 0 1 and the default value is 9 Description Sets the upper limit for the RMS EVM measurement in Query There is only a command form available Example CALC EGPR RFTX ERMS LIM UPP 45 This command will sets the upper limit to...

Page 735: ... EGPRs RFTX EVM PEAk measurement against their user definable lim its either on or off Query There is no query form of this command available Example CALC EGPR RFTX EPEA LIM STAT ON Switches the limit check on peak EVM measurements on Syntax CALCulate EGPRS RFTX EPEAk LIMit UPPer DATA real1 Parameters real1 is a floating point real number The minimum value for each is 0 the maxi mum is 500 The res...

Page 736: ... that there was no violation of the measurement limits Syntax CALCulate EGPRs RFTX ENFTh LIMit STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS EGPRs RFTX ENFTh measurement against their user definable limits either ON or OFF Query There is no query form ...

Page 737: ...mmand Description There is solely a query form of this command available Query This command delivers one boolean number indicating whether the user definable limits of the error vector magnitude origin offset were violated by a measurement result value or not A 0 means that all measurement result values were within the limits set while a 1 indicates that at least one measurement result value did v...

Page 738: ... is 0 The resolution is 0 1 and the default value is 120 Description Sets the lower limit of the error vector magnitude origin offset measurement the physical dimension of the number stated is dBc Query There is no query form of this command available Example CALC EGPR RFTX EOFF LIM LOW 100 Sets the lower limit of the error vector magnitude origin offset measurement result to 100 dBc Syntax CALCul...

Page 739: ... Parameters real1 is a floating point real number The minimum value for each is 0 the maxi mum is 100000 The resolution is 1 and the default value is 90 Description Sets the upper limit for the frequency error measurement in Hertz Query There is only a command form available Example CALC EGPR RFTX FREQ LIM UPP 45 Sets the upper limit of the frequency error measurement result to 45 Hz Syntax CALCul...

Page 740: ...he symmetrical limits of the frequency error for measurements in synchronous call mode for GSM 1800 also known as DCS 1800 or PCN the physical dimension of the number stated is Hertz Query There is only a command form available Example CALC EGPR RFTX FREQ LIM PCN 120 Sets the lower limit of the frequency error measurement result on GSM 1800 chan nels to 120 Hz and the upper limit to 120 Hz Syntax ...

Page 741: ...Mit STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the check of the measurement result values of the MEAS EGPRs RFTX LENGth measurement against their user definable limits either on or off Query There is no query form of this command available Example CALC EGPR RFTX LENG LIM STAT ON Switches the limit check...

Page 742: ...all measurement result values were within the limits set while a 1 indicates that at least one measurement result value did violate at least one of the limits The limits can be set using the commands described below Example MEAS EGPR ARR RFTX UTIM 10 CALC EGPR RFTX UTIM LIM String returned in this example 0 This string indicates that there was no violation of the measurement limits Syntax CALCulat...

Page 743: ...t the physical dimension of the number stated is microseconds Query There is only a command form available Example CALC EGPR RFTX UTIM LIM LOW 5 Sets the lower limit of the uplink error timing measurement to 5 μs Syntax CALCulate EGPRS RFTX POWer LIMit FAIL Parameters There are no parameters Description There is solely a query form of this command available Query This command delivers one boolean ...

Page 744: ...on Sets the upper limit for the mobile s RF output power level the physical dimension of the number stated is dBm Query There is only a command form available Example CALC EGPR RFTX POW LIM UPP 13 Sets the upper limit of the peak power measurement to 13 μs Syntax CALCulate EGPRs RFTX POWer LIMit LOWer DATA real1 Parameters real1 is a floating point real number The minimum value for each is 99 the ...

Page 745: ...al1 thru real19 are floating point real numbers The minimum value for each is 0 the maximum is 30 and the resolution is 0 1 The default values are 2 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 5 5 respectively Description Sets the symmetrical limits of the peak power for measurements in synchronous call mode for GSM 1800 also known as DCS 1800 or PCN the physical dimension of the number stated is dB The first...

Page 746: ...arameters Description There is solely a query form of this command available Query This command returns 18 boolean numbers indicating whether the PTT limits for a normal burst were violated or not A 0 on a position means that there was no violation of the limits while a 1 indicates that at least one measurement result did violate one of the corresponding measure ment limits The 18 boolean numbers ...

Page 747: ...e description of the CALC EGPRs RFTX TEMP LIM UPP and CALC EGPRs RFTX TEMP LIM LOW commands for further details Query There is no query form of this command available Example CALC EGPR RFTX TEMP LIM AUTO ON Switches the limit check for the burst shape to use the standard PTTs as defined by ETSI standards Syntax CALCulate EGPRs RFTX TEMPlate NORMal LIMit STAT PredefExp Parameters PredefExp is one o...

Page 748: ...53 0 for real9t 561 0 for real10t 571 0 for real11t 580 0 The minimum value for realxp is 150 0 the maximum value 5 0 The mini mum resolution possible for realxp is 0 1 The default values are for real0p 59 0 for real1p 59 0 for real2p 30 0 for real3p 6 0 for real4p 4 0 for real5p 2 4 for real6p 4 0 for real7p 2 4 for real8p 4 0 for real9p 6 0 for real10p 30 0 for real11p 59 0 Description Sets the ...

Page 749: ...for real6t 543 0 for real7t 580 0 The minimum value for realxp is 150 0 the maximum value 5 0 The mini mum resolution possible for all realxp is 0 1 The default values are for real0p 150 0 for real1p 150 0 for real2p 2 0 for real3p 0 0 for real4p 20 0 for real5p 0 0 for real6p 2 0 for real7p 150 0 Description Sets the lower limits for the user definable PTT for normal bursts The lower limits of th...

Page 750: ...ls refer to section Corner Points Query There is no query form to this command Example CALC EGPR RFTX CORN POS 28 18 10 0 542 8 552 8 562 8 572 8 Syntax CALCulate EGPRs RFTX CORNer NORMal LIMit FAIL Parameters There are no parameters Description There is solely a query form of this command available Query This command delivers eight boolean numbers indicating whether the limits for the eight corne...

Page 751: ...off Syntax CALCulate EGPRs RFTX CORNer NORMal LIMit UPPer DATA real1 real2 real3 real4 real5 real6 real7 real8 Parameters realx are floating point real numbers The minimum value for realx is 150 0 the maximum is 10 0 The minimum resolution possible for realx is 0 01 The default value for realx is 4 0 Description Sets the upper limits at the eight user definable corner points for normal bursts The ...

Page 752: ...es and returns the average measurement result value of the ACPM measure ment started last The string delivered back will contain as many average values as measurement types performed The single average values will always have the format of floating point real numbers and will be separated by commas Example CALC RES MEAS EGPR ARR RFSP ACPM MOD CALC EGPRs RFSP ACPM MAV Syntax CALCulate EGPRs RFSPect...

Page 753: ... RES MEAS EGPR ARR RFSP ACPM MOD CALC EGPRs RFSP ACPM MMAX Syntax CALCulate EGPRs RFSPectrum ACPM MSIGma Parameters There are no parameters Description There is solely a query form of this command available Query Returns the mean value and the standard deviation of the RF spectrum measure ment In the case of the ACP Mod measurement the string delivered back contains 27 pairs of mean values and sta...

Page 754: ...measurement will be performed on 0 400 600 1 200 and 1 800 kHz offset from the carrier All measure ments will be performed with a measuring bandwidth of 30 kHz For additional infor mation also the measurement values of the 30 kHz windows below and above the frequencies specified by GSM standard 05 05 will be taken into account This adds up to 9 x 3 27 measurement result values Example MEAS EGPR BL...

Page 755: ...1 The default values are 60 0 for real1 real8 33 0 for real9 30 0 for real10 0 5 for real11 0 5 for real12 0 5 for real13 30 0 for real14 33 0 for real15 and 60 0 for real16 real23 Description Sets the upper limits for the 23 single measurement result values of the ACPM mod ulation spectrum measurement The single data values are interpreted as dBc dB rel ative to the power level measured at the tr...

Page 756: ... 100 0 the maximum value 10 0 The mini mum resolution possible for all realx is 0 01 The default value for all realx is 100 0 Description Sets the lower limits for the 23 single measurement result values of the ACPM modu lation spectrum measurement The single data values are interpreted as dBc dB rela tive to the power level measured at the transmission frequency Query The query form of this comma...

Page 757: ...asurement will be performed on 0 400 600 1 200 and 1 800 kHz offset from the carrier All measure ments will be performed with a measuring bandwidth of 30 kHz For additional infor mation also the measurement values of the 30 kHz windows below and above the frequencies specified by GSM standard 05 05 will be taken into account This adds up to 9 x 3 27 measurement result values Example MEAS EGPR ARRa...

Page 758: ...itching transients The physical dimension of the single data values is dBm Query There is no query form of this command available Example CALC EGPR RFSP ACPM TRAN LIM UPP This command will return the 27 upper limit values Syntax CALCulate EGPRs RFSPectrum ACPM TRAN sient LIMit LOWer DATA real1 real2 real3 real4 real5 real6 real7 real8 real9 real10 real11 real12 real13 real14 real15 real16 real17 r...

Page 759: ... specified Example MEAS EGPR BLOC MSP AVG 20 CALC EGPR RFSP MSP VAL 50000 This command will interpolate a modulation spectrum measurement at an offset of 50 kHz to the carrier The value returned in this example is 4 7 Syntax CALCulate EGPRs RFSPectrum MSPectrum VALue real1 Parameters real1 is a floating point real number The minimum value is 2 000 000 0 the maximum is 2 000 000 0 The minimum resol...

Page 760: ...F Default is OFF Description Switches the RF generator on or off While the Willtek 4400 is in RF generator mode there is no signaling active This means that the Willtek 4400 may be used as RF signal generator for all kinds of RF and GSM signals While working as an RF generator the Willtek 4400 does not respond to any messages sent by the mobile nor does the test set expect the mobile under test to...

Page 761: ...used on the RF output signal NO means that the output signal will not be modulated while GMSK means that the output signal will be GMSK Gaussian Minimum Shift Keying modulated Another alternative is Amplitude Modulation Notes As soon as GMSK is selected the Willtek 4400 will provide a GSM like RF output signal A number of GSM specific parameters like burst transmission or the type of training sequ...

Page 762: ...ed expressions NORMal INVert Default is NORMal Description Sets the modulation polarity for the GMSK coded RF output signals NORMal means standard modulation polarity while INVert will invert the modula tion polarity Query The query form of this command returns the current setting A query will return a string containing the short form version of one of the predefined expressions explained above Ex...

Page 763: ... encrypted data positions see section Timeslots and Bursts for reference When RFG GSM MOD TSEQ STAT OFF has been selected all 148 useful bits of a timeslot will be filled with the bit pattern specified with this command PRBS9 stands for a pseudorandom bit sequence The length of this sequence will be 511 bits 2 to the power of 9 1 PRBS15 is a pseudorandom bit sequence with a length of 32767 bits PR...

Page 764: ...ith the help of command RFG STYP you may select whether the Willtek 4400 transmits a continuous wave or bursts This command is described below Query The query form of this command returns the current setting A query will return a string containing one integer Example RFGenerator GSM BURSt TSLot 3 RFG BURS TSL Value returned 3 Syntax RFGenerator GSM STYPe PredefExp Parameters PredefExp is one of th...

Page 765: ...EVel DATA 80 0 70 0 60 0 50 0 40 0 30 0 20 0 10 0 RFG MSL LEV Values returned 80 0 70 0 60 0 50 0 40 0 30 0 20 0 10 0 Syntax RFGenerator GSM MSLot LEVel MODE PredefExp Parameters PredefExp is one of the following predefined expressions INDividual STANdard Default is INDividual Description Switches the use of individual RF output power levels on or off INDividual means that the individual RF output...

Page 766: ...vel of the Willtek 4400 The value specified for real1 is the power output level in dBm Query The query form of this command will return the current setting The string delivered back will contain one floating point real number Example RFGenerator EGPRs LEVel 50 5 RFG EGPRs LEV Value returned in this example 50 5 Syntax RFGenerator EGPRs MODulation PredefExp Parameters PredefExp is one of the follow...

Page 767: ... of this command will return the current setting The string delivered back will contain one floating point real number Example RFGenerator EGPRs MOD AM MFR 2000 RFG EGPRs MOD AM MFR Value returned in this example 2000 Syntax RFGenerator EGPRs MODulation AM MDEPth int1 Parameters int1 is an integer The minimum value for int1 is 50 the maximum value is 90 The default value is 83 Description This par...

Page 768: ...th four ones and continuing with the inverted value of the current four bits 111100001111 while EIGHtonezero means a bit sequence starting with eight ones and con tinuing with the inverted value of the current eight bits 111111110000000011111111 Query The query form of this command will return the current setting The string delivered back will contain one of short form versions of the predefined e...

Page 769: ...ther ON or OFF Query The query form of this command returns the current setting A query will return a string containing one of the predefined expressions explained above Example RFGenerator EGPRs MODulation DIFFbitcod ON RFG EGPRs MOD DIFF Value returned in this example ON Syntax RFGenerator EGPRs MODulation POLarity PredefExp Parameters PredefExp is one of the following predefined expressions NOR...

Page 770: ...he type of training sequence to be used More details regarding the training sequence can be found in section Timeslots and Bursts Query The query form of this command returns the current setting A query will return a string containing one integer Example RFG EGPRs MODulation TSEQuence DATA 3 RFG EGPRs MOD TSEQ Value returned in this example 3 Syntax RFGenerator EGPRs MSLOT LEVel DATA real1 Paramet...

Page 771: ...ill return the current setting The string delivered back will contain the short form version of one of the predefined expressions explained above Example RFG EGPRs MSLot LEVel MODE INDividual RFG EGPRs MSL LEV MODE Value returned in this example IND Syntax RFGenerator EGPRs STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is OFF Description Switche...

Page 772: ...s the RF generator on or off While the Willtek 4400 is in RF generator mode there is no signaling active This means that the Willtek 4400 may be used as RF signal generator for all kinds of RF and GSM signals While working as an RF generator the Willtek 4400 does not respond to any messages sent by the mobile nor does the test set expect the mobile under test to react in any way Query The query fo...

Page 773: ... modulated while GMSK means that the output signal will be GMSK Gaussian Minimum Shift Keying modulated Another alternative is Amplitude Modulation Notes As soon as GMSK is selected the Willtek 4400 will provide a GSM like RF output signal A number of GSM specific parameters like burst transmission or the type of training sequence to be integrated into the bursts may be selected with the commands ...

Page 774: ...l Description Sets the modulation polarity for the GMSK coded RF output signals NORMal means standard modulation polarity while INVert will invert the modula tion polarity Query The query form of this command returns the current setting A query will return a string containing the short form version of one of the predefined expressions explained above Example RFG GSM MODulation POLarity INVert RFG ...

Page 775: ...nd Bursts for reference When RFG GSM MOD TSEQ STAT OFF has been selected all 148 useful bits of a timeslot will be filled with the bit pattern specified with this command PRBS9 stands for a pseudorandom bit sequence The length of this sequence will be 511 bits 2 to the power of 9 1 PRBS15 is a pseudorandom bit sequence with a length of 32767 bits PRBS23 is a pseudorandom bit sequence as well The l...

Page 776: ...k 4400 transmits a continuous wave or bursts This command is described below Query The query form of this command returns the current setting A query will return a string containing one integer Example RFGenerator GSM BURSt TSLot 3 RFG BURS TSL Value returned 3 Syntax RFGenerator GSM STYPe PredefExp Parameters PredefExp is one of the following predefined expressions BURSt CWAVe Default is BURSt De...

Page 777: ... Values returned 80 0 70 0 60 0 50 0 40 0 30 0 20 0 10 0 Syntax RFGenerator GSM MSLot LEVel MODE PredefExp Parameters PredefExp is one of the following predefined expressions INDividual STANdard Default is INDividual Description Switches the use of individual RF output power levels on or off INDividual means that the individual RF output power levels specified with the RFG MSL LEV command will be ...

Page 778: ...vel of the Willtek 4400 The value specified for real1 is the power output level in dBm Query The query form of this command will return the current setting The string delivered back will contain one floating point real number Example RFGenerator EGPRs LEVel 50 5 RFG EGPRs LEV Value returned in this example 50 5 Syntax RFGenerator EGPRs MODulation PredefExp Parameters PredefExp is one of the follow...

Page 779: ... of this command will return the current setting The string delivered back will contain one floating point real number Example RFGenerator EGPRs MOD AM MFR 2000 RFG EGPRs MOD AM MFR Value returned in this example 2000 Syntax RFGenerator EGPRs MODulation AM MDEPth int1 Parameters int1 is an integer The minimum value for int1 is 50 the maximum value is 90 The default value is 83 Description This par...

Page 780: ...th four ones and continuing with the inverted value of the current four bits 111100001111 while EIGHtonezero means a bit sequence starting with eight ones and con tinuing with the inverted value of the current eight bits 111111110000000011111111 Query The query form of this command will return the current setting The string delivered back will contain one of short form versions of the predefined e...

Page 781: ...ther ON or OFF Query The query form of this command returns the current setting A query will return a string containing one of the predefined expressions explained above Example RFGenerator EGPRs MODulation DIFFbitcod ON RFG EGPRs MOD DIFF Value returned in this example ON Syntax RFGenerator EGPRs MODulation POLarity PredefExp Parameters PredefExp is one of the following predefined expressions NOR...

Page 782: ...he type of training sequence to be used More details regarding the training sequence can be found in section Timeslots and Bursts Query The query form of this command returns the current setting A query will return a string containing one integer Example RFG EGPRs MODulation TSEQuence DATA 3 RFG EGPRs MOD TSEQ Value returned in this example 3 Syntax RFGenerator EGPRs MSLOT LEVel DATA real1 Paramet...

Page 783: ...ill return the current setting The string delivered back will contain the short form version of one of the predefined expressions explained above Example RFG EGPRs MSLot LEVel MODE INDividual RFG EGPRs MSL LEV MODE Value returned in this example IND Syntax RFGenerator EGPRs STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is OFF Description Switche...

Page 784: ...s the RF generator on or off While the Willtek 4400 is in RF generator mode there is no signaling active This means that the Willtek 4400 may be used as RF signal generator for all kinds of RF and GSM signals While working as an RF generator the Willtek 4400 does not respond to any messages sent by the mobile nor does the test set expect the mobile under test to react in any way Query The query fo...

Page 785: ... modulated while GMSK means that the output signal will be GMSK Gaussian Minimum Shift Keying modulated Another alternative is Amplitude Modulation Notes As soon as GMSK is selected the Willtek 4400 will provide a GSM like RF output signal A number of GSM specific parameters like burst transmission or the type of training sequence to be integrated into the bursts may be selected with the commands ...

Page 786: ...l Description Sets the modulation polarity for the GMSK coded RF output signals NORMal means standard modulation polarity while INVert will invert the modula tion polarity Query The query form of this command returns the current setting A query will return a string containing the short form version of one of the predefined expressions explained above Example RFG GSM MODulation POLarity INVert RFG ...

Page 787: ...nd Bursts for reference When RFG GSM MOD TSEQ STAT OFF has been selected all 148 useful bits of a timeslot will be filled with the bit pattern specified with this command PRBS9 stands for a pseudorandom bit sequence The length of this sequence will be 511 bits 2 to the power of 9 1 PRBS15 is a pseudorandom bit sequence with a length of 32767 bits PRBS23 is a pseudorandom bit sequence as well The l...

Page 788: ...k 4400 transmits a continuous wave or bursts This command is described below Query The query form of this command returns the current setting A query will return a string containing one integer Example RFGenerator GSM BURSt TSLot 3 RFG BURS TSL Value returned 3 Syntax RFGenerator GSM STYPe PredefExp Parameters PredefExp is one of the following predefined expressions BURSt CWAVe Default is BURSt De...

Page 789: ... Values returned 80 0 70 0 60 0 50 0 40 0 30 0 20 0 10 0 Syntax RFGenerator GSM MSLot LEVel MODE PredefExp Parameters PredefExp is one of the following predefined expressions INDividual STANdard Default is INDividual Description Switches the use of individual RF output power levels on or off INDividual means that the individual RF output power levels specified with the RFG MSL LEV command will be ...

Page 790: ...vel of the Willtek 4400 The value specified for real1 is the power output level in dBm Query The query form of this command will return the current setting The string delivered back will contain one floating point real number Example RFGenerator EGPRs LEVel 50 5 RFG EGPRs LEV Value returned in this example 50 5 Syntax RFGenerator EGPRs MODulation PredefExp Parameters PredefExp is one of the follow...

Page 791: ... of this command will return the current setting The string delivered back will contain one floating point real number Example RFGenerator EGPRs MOD AM MFR 2000 RFG EGPRs MOD AM MFR Value returned in this example 2000 Syntax RFGenerator EGPRs MODulation AM MDEPth int1 Parameters int1 is an integer The minimum value for int1 is 50 the maximum value is 90 The default value is 83 Description This par...

Page 792: ...th four ones and continuing with the inverted value of the current four bits 111100001111 while EIGHtonezero means a bit sequence starting with eight ones and con tinuing with the inverted value of the current eight bits 111111110000000011111111 Query The query form of this command will return the current setting The string delivered back will contain one of short form versions of the predefined e...

Page 793: ...ther ON or OFF Query The query form of this command returns the current setting A query will return a string containing one of the predefined expressions explained above Example RFGenerator EGPRs MODulation DIFFbitcod ON RFG EGPRs MOD DIFF Value returned in this example ON Syntax RFGenerator EGPRs MODulation POLarity PredefExp Parameters PredefExp is one of the following predefined expressions NOR...

Page 794: ...he type of training sequence to be used More details regarding the training sequence can be found in section Timeslots and Bursts Query The query form of this command returns the current setting A query will return a string containing one integer Example RFG EGPRs MODulation TSEQuence DATA 3 RFG EGPRs MOD TSEQ Value returned in this example 3 Syntax RFGenerator EGPRs MSLOT LEVel DATA real1 Paramet...

Page 795: ...ill return the current setting The string delivered back will contain the short form version of one of the predefined expressions explained above Example RFG EGPRs MSLot LEVel MODE INDividual RFG EGPRs MSL LEV MODE Value returned in this example IND Syntax RFGenerator EGPRs STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is OFF Description Switche...

Page 796: ...witches the RF generator on or off While the Willtek 4400 is in RF generator mode there is no signaling active This means that the Willtek 4400 may be used as RF signal generator for all kinds of RF and GSM signals While working as an RF generator the Willtek 4400 does not respond to any messages sent by the mobile nor does the test set expect the mobile under test to react in any way Query The qu...

Page 797: ...ers PredefExp is one of the following predefined expressions NO GMSK AM Default is NO Description This command selects the type of modulation to be used on the RF output signal NO means that the output signal will not be modulated while GMSK means that the output signal will be GMSK Gaussian Minimum Shift Keying modulated Another alternative is Amplitude Modulation Notes As soon as GMSK is selecte...

Page 798: ... the AM modulation depth in Note AM is available only if the AM Signal Generator Option is installed Query The query form of this command returns the current setting A query will return a string containing one integer Example RFGenerator GSM MOD AM MDEP 50 MOD AM MDEP Value returned 50 Syntax RFGenerator GSM MODulation POLarity PredefExp Parameters PredefExp is one of the following predefined expr...

Page 799: ... explained above Example RFG GSM MODulation TSEQuence STATe ON RFG MOD TSEQ STAT Value returned ON Syntax RFG GSM MODulation TSEQuence DATA int1 Parameters int1 is an integer The minimum value for int1 is 0 the maximum value is 7 The default value is 0 Note This command only selects the type of training sequence To switch the use of a training sequence on or off use the command described above Des...

Page 800: ...all bits transmitted will be set to ones 111 ONEZero stands for a bit sequence starting with a one and continuing with the inverted value of the current bit 10101 DOUBleonezero will set the bits transmitted to a sequence of double ones and double zeros 11001100 FOURonezero means a bit sequence starting with four ones and continuing with the inverted value of the current four bits 111100001111 whil...

Page 801: ...s one of the following predefined expressions BURSt CWAVe Default is BURSt Description This command switches between burst transmission BURSt or continuous signal transmission without bursts CWAVe CWAVe means that the Willtek 4400 will generate a coded GSM signal in all timeslots according to the settings above When set to BURSt the Willtek 4400 will generate only one burst per TDMA frame This mea...

Page 802: ...fExp is one of the following predefined expressions INDividual STANdard Default is INDividual Description Switches the use of individual RF output power levels on or off INDividual means that the individual RF output power levels specified with the RFG MSL LEV command will be used STANdard means that the individual RF power levels will be ignored and that the standard RF output level of the Willte...

Page 803: ...g containing one integer Example RFGenerator EGPRs BURSt TSLot 3 RFG BURS TSL Value returned in this example 3 Syntax RFGenerator EGPRs LEVel real1 Parameters real1 is a floating point real number The minimum value for real1 is 120 0 the maximum value is 10 0 The min imum resolution for real1 is 0 1 The default value for real1 is 60 0 Description This command sets the RF output power level of the ...

Page 804: ...on GMSK RFG MOD Value returned in this example GMSK Syntax RFGenerator EGPRs MODulation AM MFRequency real1 Parameters real1 is a floating point real number The minimum value for real1 is 1 000 the maximum value is 50 000 The reso lution for real1 is 1000 The default value for real1 is 10 000 Description This command sets the modulating frequency for the AM modulated signal Note that AM will only ...

Page 805: ...3 is a pseudo random bit sequence as well The length is 8388607 bits ALLZero means that all bits transmitted are zeros 000 In case ALLOne is selected all bits transmitted will be set to ones 111 ONEZero stands for a bit sequence starting with a one and continuing with the inverted value of the current bit 10101 DOUBleonezero will set the bits transmitted to a sequence of double ones and double zer...

Page 806: ...he string BPDC Syntax RFGenerator EGPRs MODulation CS int1 Parameters Valid entries for int1 are in the range from 1 to 4 The default is 1 Description Sets the coding scheme If RFG EGPRs MOD CHAN is set to either PDCH or BPDCh the Willtek 4400 transmits a packet data channel which is encoded using this coding scheme Query The query form of this command returns the current setting The string delive...

Page 807: ...MOD POL Value returned in this example INV Syntax RFGenerator EGPRs MODulation TSEQuence STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description This command switches the use of a training sequence either ON or OFF Notes The type of training sequence can be set using the command described below More details regarding the training sequenc...

Page 808: ...the maximum value is 10 0 The resolution of each realx is 0 1 The default value for each realx is 60 0 Note All eight values must be specified Description This command configures individual RF output power levels for the eight DL timeslots Every value represents the RF output power level of Willtek 4400 in dBm during the related timeslot Note This command only prepares the use of individual RF pow...

Page 809: ...e of the predefined expressions explained above Example RFG EGPRs MSLot LEVel MODE INDividual RFG EGPRs MSL LEV MODE Value returned in this example IND Syntax RFGenerator EGPRs STATe PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is OFF Description Switches the RF generator ON or OFF While Willtek 4400 Willtek 4400 is in RF generator mode there is no s...

Page 810: ... coded GSM signal in all timeslots according to the settings above When set to BURSt Willtek 4400 will generate only one burst per TDMA frame This means that there will be no RF transmission during the remaining 7 timeslots Query The query form of this command returns the current setting A query will return a string containing the short form version of one of the predefined expressions explained a...

Page 811: ... delivered back will contain one floating point real number Example RFANalyser GSM FREQuency 880200000 RFAN FREQ Value returned 880200000 Syntax RFANalyser GSM MODulation PredefExp Parameters PredefExp is one of the following predefined expressions GMSK UNMod Default is GMSK Description Sets the modulation type to be expected by the RF analyzer By nature measurement results differ depending on the...

Page 812: ...real number The minimum value for real1 is 800 000 000 the maximum value is 2 000 000 000 The minimum resolu tion for real1 is 1 The default value for real1 is 800 000 000 Description This command sets the RF analyzer s center frequency The value specified for real1 is the center frequency in Hz Notes The frequency of the Willtek 4400 internal synthesizer can be changed in steps of 10 Hz For furth...

Page 813: ...ernal synthesizer can be changed in steps of 10 Hz For further details on the RF analyzer please refer to section 3 1 Generator Ana lyzer Query The query form of this command will return the current setting The string delivered back will contain one floating point real number Example RFANalyser GSM FREQuency 880200000 RFAN FREQ Value returned 880200000 Syntax RFANalyser GSM MODulation PredefExp Pa...

Page 814: ...edefExp Parameters PredefExp is one of the following predefined expressions RES5 RES10 RES30 Default is RES2 Description Sets the spectral resolution of the modulation spectrum analyzer RES5 stands for a resolution of 5 kHz This resolution may only be chosen in con junction with the 400 kHz spectral bandwidth span as described above RES5 will set a resolution of 5 kHz This resolution may only be c...

Page 815: ...00 Syntax RFSPectrum GSM GPRS EGPRs MSPectrum RESolution PredefExp Parameters PredefExp is one of the following predefined expressions RES5 RES10 RES30 Default is RES2 Description Sets the spectral resolution of the modulation spectrum analyzer RES5 stands for a resolution of 5 kHz This resolution may only be chosen in con junction with the 400 kHz spectral bandwidth span as described above RES5 w...

Page 816: ...efined expressions SP400 SP1000 SP3600 Default is SP400 Description Sets the span i e the spectral bandwidth of the modulation spectrum analyzer SP400 will set a span of 400 kHz SP1000 will set a span of 1 MHz SP3600 will set a span of 3 6 MHz Note More details regarding the modulation spectrum analyzer can be found in sec tion Spectrum Measurements Query The query form of this command returns the...

Page 817: ...bandwidth span as described above Notes With the span set to 400 kHz only the following spectral resolutions are avail able 2 kHz RES2 5 kHz RES5 and 10 kHz RES10 With the span set to 1 MHz only the following spectral resolutions are available 5 kHz RES5 and 10 kHz RES10 With the span set to 3 6 MHz only the following spectral resolutions are avail able 10 kHz RES10 and 30 kHz RES30 More details r...

Page 818: ...ltek 4400 Query The query form of this command returns the current setting A query will return a string containing one of the predefined expressions explained above Example AFGenerator STATe ON AFG STAT Value returned ON Syntax AFGenerator MODE PredefExp Parameters PredefExp is one of the following predefined expressions SINGle REPLay Default is SINGle Description This command sets the AF generato...

Page 819: ... explained above Example AFGenerator OUTPut AF AFG OUTP Value returned AF Syntax AFGenerator LEVel RELative AF real1 Parameters real1 is a floating point real number The minimum value for real1 is 0 000 the maximum value is 4 000 The resolution for real1 is 0 001 The default value for real1 is 0 000 Description This command sets the output voltage of the signals available at the AF out con nector ...

Page 820: ...n for real1 is 0 1 The default value for real1 is 1000 0 Description This command sets the frequency of the AF generator as long as it is run in single tone generation mode The physical dimension of real1 is Hertz Note Please refer to the description of the AFG MODE command for further details regarding the single tone generation mode Query The query form of this command will return the current se...

Page 821: ... rapid wav directory to the wave file replay function Syntax AFGenerator REPLay REPeat PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is ON Description Selects whether the samples shall play once or repetitively Query The query form of this command returns the current setting A query will return a string containing one of the predefined expressions exp...

Page 822: ...or further details regarding the connectors of the Willtek 4400 please refer to section Connectors on page 9 Please note that the auxiliary output needs to be switched on first see command AFG SPEA STAT above for details Query The query form of this command returns the current setting A query will return a string containing the short form version of one of the predefined expressions explained abov...

Page 823: ...ec is an option to the Willtek 4400 For details please refer to section Accessories and options on page 29 Input voltage limitations apply on the AF in and the AUX in connectors of the Willtek 4400 Please refer to section Connectors on page 9 for details RF cannot be signal source and generator destination at the same time Please check the current setting of the AFG OUTP command before issuing the...

Page 824: ...al Query The query form of this command returns the current setting A query will return a string containing one of the predefined expressions explained above Example AFANalyser COUPLING DC AFAN COUP Value returned DC Syntax AFANalyser BALanced PredefExp Parameters PredefExp is one of the following predefined expressions ON OFF Default is OFF Description Selects whether AF in shall be used as an un...

Page 825: ...rrent setting A query will return a string containing one of the predefined expressions as explained above Example AFANalyser VRANge V30 AFAN VRAN Value returned V30 Syntax AFANalyser MRANge PredefExp Parameters PredefExp is one of the following predefined expressions AUTO V1 MV100 Default is AUTO Description This command sets the range of the expected input voltage on the Willtek 4400 AUX 4 AUX i...

Page 826: ...FANalyser FILTer NONE AFAN FILT Value returned NONE Syntax AFANalyser SPECtrum RLEVel real1 Parameters real1 is a floating point real number The minimum value for real1 is 0 001 the maximum value is 30 0 The minimum resolution for real1 is 0 001 The default value for real1 is 1 0 Description This command sets the level of the reference voltage i e the 0 dB line of the AF spec trum display The phys...

Page 827: ...ring containing one of the predefined expressions explained above Example PSUPply STATe ON PSUP STAT Value returned ON Syntax PSUPply LEVel real1 Parameters real1 is a floating point real number The minimum value for real1 is 0 0 the maximum value is 10 0 The minimum resolution for real1 is 0 05 The default value for real1 is 0 0 Description This command sets the output voltage of the optional pow...

Page 828: ...requirement of the mobile is unknown setting A4 the default setting is recommended as it will allow the mobile to draw a maximum cur rent of 4 A Please note that this command needs both the power supply option and the current measurement option to be installed on your Willtek 4400 Details regarding these options can be found in section Accessories and options on page 29 Query The query form of thi...

Page 829: ...on Version 12 20 805 Appendix B Warranty and Repair This chapter describes the customer services available through Willtek Topics discussed in this chapter include the following Warranty information on page 806 Equipment return instructions on page 807 ...

Page 830: ...r its designated service provider for warranty service Willtek or its designated service provider shall pay costs for return of products to the buyer Willtek s obligation and the customer s sole remedy under this hardware warranty is limited to the repair or replacement at Willtek s option of the defec tive product Willtek shall have no obligation to remedy any such defect if it can be shown a tha...

Page 831: ...our instru ment include a copy of the invoice or delivery note Detailed description of the problem or service requested Name and telephone number of the person to contact regarding questions about the repair Return authorization RA number or reference number If possible return the equipment using the original shipping container and mate rial Additional Willtek shipping containers are available fro...

Page 832: ...Appendix B Warranty and Repair Equipment return instructions 808 4460 GSM System Option and 4468 EDGE System Option Version 12 20 ...

Page 833: ...erna 4400 0103 283 A Call setup selectable between FACCH and SDCCH Program update via GPIB 0103 284 A Manufacturer name changed from Wavetek Wandel Goltermann to Acterna Field for serial number added 0111 300 A SCPI commands tools and utility sections completed 0207 310 A Audio wavefile replay Current Measurement option service screen AM Signal Generator option added New company name logo new IDN ...

Page 834: ...cala willtek com sales us willtek com Willtek Communications Singapore Asia Pacific Tel 65 6827 9670 Fax 65 6827 9601 willtek ap willtek com Willtek Communications Ltd Shanghai China Tel 86 21 5835 8039 Fax 86 21 5835 5238 willtek cn willtek com Copyright 2007 Willtek Communications GmbH All rights reserved Willtek Communications Willtek and its logo are trademarks of Willtek Communications GmbH A...

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