manualshive.com logo in svg

Rohde & Schwarz NRT 1080.9506.02/.62, Operating Manual

Share
Download
Rohde & Schwarz NRT 1080.9506.02/.62 Operating Manual Download Page 3

1080.0483.12 S.1 E-3

About this Manual

This operating manual is valid for NRT power reflection meters with firmware version 2.21 and sensors
NRT-Z43/44 with firmware version 1.38 or higher.

If sensors with an earlier firmware version are used the modulation correction (see section 2.4.3) and
attenuation correction (see section 2.4.4) are not available. Instead, the parameter list for the video
bandwith setting contains the entry "spread spectrum". The function of this entry is similar to the
modulation correction; for details refer to the sensor manuals.

深圳德标仪器 

135-1095-0799

Summary of Contents for NRT 1080.9506.02/.62

Page 1: ...1081 0483 12 09 1 Test and Measurement Division Operating Manual Power Reflection Meter NRT 1080 9506 02 62 Printed in the Federal Republic of Germany 深圳德标仪器 135 1095 0799 ...

Page 2: ...深圳德标仪器 135 1095 0799 ...

Page 3: ...gher If sensors with an earlier firmware version are used the modulation correction see section 2 4 3 and attenuation correction see section 2 4 4 are not available Instead the parameter list for the video bandwith setting contains the entry spread spectrum The function of this entry is similar to the modulation correction for details refer to the sensor manuals 深圳德标仪器 135 1095 0799 ...

Page 4: ...深圳德标仪器 135 1095 0799 ...

Page 5: ...List of R S Representatives Tabbed Divider 1 Chapter 1 Preparation for Use 2 Chapter 2 Manual Operation 3 Chapter 3 Remote Control 4 Chapter 4 Maintenance and Troubleshooting 5 Chapter 5 Testing the Rated Specifications 6 Annex A Interfaces 7 Annex B List of Error Messages 8 Annex C List of Commands 9 Annex D Programming Examples 10 Annex E Default Settings 10 Index 深圳德标仪器 135 1095 0799 ...

Page 6: ...深圳德标仪器 135 1095 0799 ...

Page 7: ...ral 1 8 1 4 2 Charging the Battery 1 8 1 4 3 Manual Start Stop of Battery Charging 1 9 1 4 4 Reducing the Power Consumption 1 10 1 4 5 Preselection of ON Period 1 11 1 4 6 Battery Counter 1 11 1 4 7 Replacing the Battery 1 12 2 Manual Operation 2 1 Short Introduction 2 1 2 1 1 Correct Connection of Sensor 2 1 2 1 2 Default Setup 2 1 2 1 3 Measuring the Power 2 2 2 1 3 1 Unit Selectable in W or dBm...

Page 8: ...3 1 3 Average Burst Power 2 20 2 3 1 4 Cumulative Distribution Function 2 22 2 3 2 POWER Configuration of Power Display 2 23 2 3 3 MAXHOLD min max display on off 2 23 2 3 4 MAXDISP display of max value min value or difference 2 24 2 3 5 SCALE Setting of Scale Limits for Bargraphs 2 24 2 3 6 RESOL Resolution of Indication in Display 2 25 2 3 7 INT TIME Setting the Integration Time 2 26 2 3 7 1 USER...

Page 9: ...riteria 2 46 2 5 9 3 Selection of Output Level for SWR Alarm 2 47 2 5 10SHOW Display of Correction Frequency and or Cable Loss 2 48 2 5 11TEST Built in Tests 2 48 2 5 12ELAPSED TIME Elapsed Time Meter 2 49 2 5 13KEYBOARD LOCK 2 50 3 Remote Control 3 1 Brief Instructions 3 1 3 1 1 IEC IEEE bus 3 1 3 1 2 RS 232 Interface 3 2 3 2 Switchover to Remote Control 3 3 3 2 1 Remote Control via IEC Bus 3 3 3...

Page 10: ...IT Subsystem 3 45 3 6 Instrument Model and Command Processing 3 47 3 6 1 Input Unit 3 47 3 6 2 Command Recognition 3 48 3 6 3 Data Set and Instrument Hardware 3 48 3 6 4 Status Reporting System 3 48 3 6 5 Output Unit 3 49 3 6 6 Command Sequence and Command Synchronization 3 49 3 7 Status Reporting System 3 50 3 7 1 Structure of an SCPI Status Register 3 50 3 7 2 Overview of the Status Registers 3 ...

Page 11: ...Module 4 8 4 5 Installation and Removal of Modules 4 10 4 5 1 Opening the Instrument 4 10 4 5 2 Option NRT B1 4 11 4 5 3 Option NRT B2 4 11 4 5 4 Option NRT B3 4 12 4 5 5 Power Supply 4 13 4 5 6 Display Board 4 14 4 5 7 Mainboard 4 14 5 Checking the Rated Specifications 5 1 Measuring Equipment and Accessories 5 1 5 1 1 Test Setup for Checking the Option NRT B1 5 2 5 2 Test Procedure 5 2 5 2 1 Swit...

Page 12: ... Annex A 1 4 Interface Messages A 3 Annex A 2 RS 232 C Interface A 4 Annex A 2 1 Interface characteristics A 4 Annex A 2 2 Signal lines A 4 Annex A 2 3 Transmission parameters A 5 Annex A 2 4 Interface functions A 5 Annex A 2 5 Handshake A 5 Annex B List of Error Messages Annex B 1 SCPI Specific Error Messages B 1 Annex B 2 NRT Specific Error Messages B 8 Annex C List of Commands Annex D Programmi...

Page 13: ... D 4 Switchover to Manual Control D 2 Annex D 5 Reading out Device Settings D 3 Annex D 6 Performing a measurement D 3 Annex D 7 Command Synchronization D 4 Annex D 8 Service Request D 5 Annex E Default Settings Index 深圳德标仪器 135 1095 0799 ...

Page 14: ...mmand systems The SENse system 3 7 Fig 3 2 Instrument model in the case of remote control by means of the IEC bus 3 47 Fig 3 3 The status register model 3 50 Fig 3 4 The status registers 3 52 Fig 4 1 Insertion and removal of battery 4 1 Fig 4 2 Switching on the NRT for loading the firmware 4 4 Fig 4 3 Removing the top and bottom cover 4 10 Fig 4 4 Removing the cover plates for options NRT B1 and N...

Page 15: ... 3 44 Table 3 14 UNIT subsystem 3 45 Table 3 15 Synchronization with OPC OPC and WAI 3 49 Table 3 16 Meaning of the bits used in the status byte 3 53 Table 3 17 Meaning of the bits used in the event status register 3 54 Table 3 18 Meaning of the bits used in the STATus OPERation register 3 55 Table 3 19 Meaning of the bits used in the STATus QUEStionable register 3 55 Table 3 20 Resetting instrume...

Page 16: ...深圳德标仪器 135 1095 0799 ...

Page 17: ...al Power Sensor complies with the provisions of the Directive of the Council of the European Union on the approximation of the laws of the Member States relating to electrical equipment for use within defined voltage limits 73 23 EEC revised by 93 68 EEC relating to electromagnetic compatibility 89 336 EEC revised by 91 263 EEC 92 31 EEC 93 68 EEC Conformity is proven by compliance with the follow...

Page 18: ...深圳德标仪器 135 1095 0799 ...

Page 19: ...e individual items Remove protective covers Remove the two protective covers from the front and rear of the NRT and carefully check the instrument for any damage In case of any damage you should immediately inform the re sponsible transport agent and keep all packing material not to forfeit your claims The original packing should also be used for any later transport or shipment of the NRT You shou...

Page 20: ...T Z 2 4 4 10 Measured power with unit 11 Bargraph for power measurement 12 Scale limits and underrange identification 2 2 3 13 Indication that an external reference frequency value is used no meas value omitted when the cable loss is displayed at the same time 2 1 6 1 2 4 1 2 5 9 14 Indication of correction frequency and or cable losses 2 1 6 1 2 5 9 Reflection measurement Chapter 15 Measured quan...

Page 21: ... and for numeric entries 2 2 5 2 29 Key for opening the UTILity menu general settings of the instrument 2 5 30 Key for opening the CONFig menu setting of measurement parameters that are not available through direct access keys 2 3 Remote control Chapter 31 RS 232 interface 3 1 2 3 2 2 Anhang A 32 External trigger input or signalling output 3 5 15 2 5 8 33 IEC IEEE bus interface 3 1 1 3 2 1 Anhang ...

Page 22: ...e switching it on Observe permissible ambient temperatures 10 C to 55 C Do not cover up air vents The NRT may be connected to a single phase AC supply with a rated voltage from 100 to 240 V and rated frequency from 50 to 60 Hz For connection to 400 Hz networks it should be noted that for safety reasons the maximum AC supply voltage is 120 V Note The NRT automatically sets itself to the local AC su...

Page 23: ...lec tronics the display and the power supply of the sensors are switched off The connection to the AC sup ply is maintained and can only be interrupted by disconnecting the power cord The NRT is automatically switched on without pressing the ON STBY key as soon as AC supply volt age is applied The NRT can thus centrally be switched on in a rack 1 2 7 Connecting a Sensor to the NRT SENSOR Power mea...

Page 24: ...e instruments used and premature wear of the RF connector 1 2 9 EMC Shielding Measures To avoid electromagnetic interference the instrument must always be closed when in operation Use only appropriate shielded signalling lines and control cables 1 2 10 Function Power Up Test Upon power up the NRT performs a number of automatic checks If no error messages are displayed during the entire switch on p...

Page 25: ...8 FWD PORT SENS Further instructions for troubleshooting can be found in Chapter 4 Maintenance and Troubleshooting and in Appendix B Error Messages If the NRT still cannot be put into operation please contact the responsible R S representative 1 3 Installation of Options The following options are available for the NRT Interface for Sensors NAP Z NRT B1 1081 0902 02 Two rear panel inputs for Sensor...

Page 26: ...when the NRT is connected to the AC supply after at least 4 hours of battery operation Charging is indicated by the danger arrow and battery symbol Charging takes about two hours with battery voltage and tem perature being continuously monitored and is automatically switched off when the battery is fully charged danger arrow and battery symbol disappear If required the NRT can be configured such t...

Page 27: ... key to confirm the setting ON Charging starts The NRT returns to the measurement mode Charging is automatically completed as soon as the battery is fully charged It can however be stopped prematurely by selecting OFF in the charge menu or by switching off the NRT via the ON STBY key Occasional charging of partly discharged batteries does not cause any damage Fully charged batteries should however...

Page 28: ...tched off via the UTILity menu UTIL Press menu key Press cursor key repeatedly until the REMOTE menu appears The active state is underscored here IEC bus interface active Press cursor key until OFF is marked by a blinking un derscore LOCAL SEL Confirm selection OFF by pressing the input key The NRT returns to the measur ment mode The selection OFF remains stored even after switching off the NRT Th...

Page 29: ...turns to the measuring mode Some seconds before switching off the NRT sends a repeated rhythmical beep signal If any key is pressed during this time the switching off process is cancelled and the ON period is extended by the selected value 1 4 6 Battery Counter The NRT contains two counters one of which registers the battery operating time since the last complete charging of the battery As a fully...

Page 30: ...excluded by appropriate design measures Spare batteries under the designation NRT Z1 Order No 1081 1209 02 are available from Rohde Schwarz The battery comes complete with the plastic cap used as a holder Please note that batteries ordered from the manufacturer FEDCO type designation ENERGY DR30AA do not come with the plastic cap In this case the cap of the old battery has to be used lift locking ...

Page 31: ...easure for the matching of the load which can be expressed as standing wave ratio SWR return loss or reflection coefficient G Source Load NRT NRT Z NAP Z Forward Power Reverse Power Forward Direction To increase the dynamic range for the reflection measurements some of the sensors of type NRT Z are of unsym metrical design ie it has been taken into account that the reverse power is usually much sm...

Page 32: ... left bargraph and no carrier frequency indication 2270 GHz 2 1 3 Measuring the Power 2 1 3 1 Unit Selectable in W or dBm dBm W The dBm W key allows selection of the unit W or dBm for the power indication in the left part of the display At every third keystroke the relative difference between the measured power and the stored reference value is indicated in dB or see next section The dBm W key is ...

Page 33: ...ribing the modulation char acteristics of transmitter output stages The level difference between PEP and AVG may be between 0 dB CW signal and some 10 dB radar bursts The PEP function is supported by the sensors NAP Z7 Z8 Z10 Z11 and NRT Z43 44 The latter allow selection of the video bandwidth so that matching to the modulation signal characteristics is possible PEP AVG Crest Factor CF The crest f...

Page 34: ...submenu and the de sired parameter The return loss is the default setting 2 1 4 2 De activating the Acoustic Monitoring The NRT provides an acoustic alarm signal for continuous checking of the load matching The alarm is triggered as soon as the SWR exceeds a user defined threshold A threshold can be defined in addition to deactivate monitoring at low power levels The default values can be set as f...

Page 35: ...e carrier frequency of the test signal correction frequency If a sensor of type NRT Z is connected to the NRT no further action is required after entry of the fre quency The NRT passes the entered frequency on to the sensor which then corrects its measurement results accordingly using the individual correction factors stored in the data memory of the sensor The correction frequency can be displaye...

Page 36: ...alue 2 27 GHz The stored value is overwritten CORR Press this menu key the display shows If USER is underlined ie a user specific setting is already available skip the next step Press the cursor key the underscore is shifted to the left USER is selected the underscore starts blinking LOCAL SEL Press this input key the fre quency entered last is dis played With an NAP sensor the calibration data se...

Page 37: ...y the display shows LOCAL SEL Press this input key zeroing runs for approx 4 s Thereupon the NRT automatically returns to the measurement mode 2 1 6 3 Increasing the Measurement Accuracy for Modulated Signals When the power of wide band modulated signals is measured the envelope power varies in the rhythm of the modulation This may cause systematic deviations for all measurement functions AVG PEP ...

Page 38: ...load FWD LOAD Load matching FWD F R LOAD Power of source into 50 Ω good SWR 1 2 FWD SOURCE 2 1 6 5 Reference Plane and Cable Losses In case of more stringent requirements on the measurement accuracy the fact that the sensor absorbs part of the RF power has to be taken into account This becomes noticeable in that the signals leaving the sensor are smaller than the input signals ie it they are atten...

Page 39: ...nel is indicated by SENS below the righthand bargraph 1 2 3 0 NAP Z Switchover to another measurement channel is possible any time LOCAL SEL Press input key The number of the active channel starts blinking and can be changed SENS Use these keys to select the measurement channel SENS LOCAL SEL and confirm the setting with the input key The NRT is switched to the new measurement channel SENS Measure...

Page 40: ...ECTION REM LLO Menu keys The three menu keys activate the assiciated menus CONFig meas settings 2 3 CORRection improved meas settings 2 4 UTILity Miscellaneous 2 5 SEL LOCAL is an input key for the menus general structuring and operation of the menus is described in Section 2 2 4 Cursor keys keys for switching within a selected menu MENU keypad 2 2 4 The vertical cursor keys are for scrolling thro...

Page 41: ...reference value This measured value can be checked in the CONFig menu under the item SPEC REF see Section 2 3 8 1 IEC IEEE command SENSe n DATA value response SENSe n POWer REFerence value dBm W The dBm W key selects the unit relevant for all power indications The key allows selection of W dBm or a configurable relative unit see Sec tion 2 3 9 IEC IEEE command Example selection of W UNIT n POWer R...

Page 42: ... Range is frozen instrument switches from AUTO to FIXED mode FIXED mode Depending on cursor key used range is reduced or increased Watt 0 to 3 0 to 10 0 to 30 dB dBm 0 to 10 10 to 20 20 to 30 10 to 10 30 to 30 100 to 100 IEC IEEE command SENSe n POWer POWer RANGe AUTO OFF No direct response on IEC IEEE bus since the limits have to be stated explicitly SENSe n POWer POWer RANGe LOWer 10 SENSe n POW...

Page 43: ...n the POWER or REFLECTION keypad After changing a menu item the NRT automatically returns to the measuring mode as soon as the entry is terminated by pressing the SEL LOCAL input key 2 2 5 1 Types of Menu Parameters According to their function and operation the menu parameters can be subdivided into three groups Selection parameters Selection parameters allow setting of one of several states of a ...

Page 44: ... restrictions for an individual numeric parameter it is possi ble to edit the sign decimal point prefix unit and all numeric digits The im mediately editable digit blinks highlighted grey in the example shown Activating individual digit positions With the aid of the horizontal cursor keys and in the menu field the cursor can be set to any significant digit of the number This applies also to the si...

Page 45: ... section A detailed description of each menu item follows next graphical display of the menu item showing its position in the menu description of the parameter data of the parameter a Selection function parameters Description of selections Availability of selection Always present Sensor sensor dependent Selection 1 Description 1 Availability 1 Selection 2 Description 2 Selection 3 Default setting ...

Page 46: ...Bm W and SWR RFL Set tings for improving the measurement accuracy are collected in the CORRection menu Call up the menu with the CONF key ENV KEY PEP CF AV BRST CCDF RESOL LOW HIGH POWER FWD F R KEY dB RFLKEY RL RFR R CO REV PWR RFR R CO REV PWR AV BRST AUTO USER WIDTH 2 0 mS CCDF REF 40 dBm VID BW 4kHz 200kHz CONF PERIOD 20 0 mS MAXHOLD OFF RUN MAXDISP MIN MAX MAX MIN SCALE POWER REFL LOWER 1O LO...

Page 47: ...rement and meas urement of an envelope parameter ENV There is a choice between peak envelope power PEP aver age power AV BRST crest factor CF and cumulative distribution function CCDF CONFig ENV KEY Only the envelope parameters which can be measured by the connected sensor are indicated Selection Description Available PEP Peak Envelope Power is the peak power of an amplitude modulated signal Depen...

Page 48: ...the setting PEP is confirmed in the calling menu The bandwidths shown in the figure below 4 kHz 200 kHz and FULL can be set with sensors NRT Z43 44 FULL means that the maximum bandwidth of the sensor i e approx 4 MHz is used CONFig ENV KEY PEP VID BW The video bandwidth set in this menu overwrites the settings made in the menus CF AV BRST AUTO and CCDF IEC IEEE command SENSe n FUNCtion ON POWer FO...

Page 49: ...which values up to 10 dB are possible This measurement is only possible with sensors of type NRT Z and requires selection of a suitable video bandwidth The available bandwidths are sensor dependent and indicated in the menu in plain text as soon as the CF setting has been acknowledged in the next higher menu The bandwidths shown in the figure below 4 kHz 200 kHz and FULL can be set with sensors NR...

Page 50: ... by the NRT from the average power and the duty cycle Fig 2 5 It is equal to the amplitude of a squarewave pulse sequence having the same average power which is contained within the PEP characteristic The duty cycle may either be entered in the form of known values USER or automatically determined by the sensor AUTO Selection Description Available AUTO If provided with this function the sensor aut...

Page 51: ...cycles below 1 should be avoided The video bandwidth set in this menu overwrites the settings made in the menus PEP CF and CCDF IEC IEEE command SENSe n FUNCtion ON POWer FORWard AVERage BURSt SENSe n BURSt MODE AUTO SENSe n BANDwidth VIDeo FNUMber f f see Table 2 1 the preset value depends on the sensor used Measurement with user defined parameters USER If an automatic measurement of the average ...

Page 52: ...tered either as an absolute value in W or dBm or in dB referred to the stored reference value The unit is switched with the cursor keys and at the associated digit b Selecting the video bandwidth CONFig ENV KEY CCDF VID BW The selected video bandwidth should be at least as large as the bandwidth of the demodulated signal to avoid the loss of any details of the envelope As a rule of thumb the demod...

Page 53: ...following section display of the maximum minimum or difference value can be selected The menu CONFig MAXHOLD allows start and stop of the max min determination for both the power and reflection indication Determination of the max min value is started by selecting the menu item RUN As soon as a value is measured that is greater than the stored maximum value or smaller than the stored minimum value ...

Page 54: ... value Always MAX MIN Display of difference between maximum and minimum value Always Preset MAX IEC IEEE command CALCulate n LIMit TYPE MINimum MAXimum DIFFerence Select max min or difference 2 3 5 SCALE Setting of Scale Limits for Bargraphs Scaling of the two bargraphs can be coarsely adjusted using the keys and In the CONFig SCALE menu the scale end values for indication of the power POWER and r...

Page 55: ...rgraphs is dimensionless If another unit is selected for the measured value the scaling is not converted 2 3 6 RESOL Resolution of Indication in Display The CONFig RESOL menu provides the possibility of indicating the measurement results with low LOW or high HIGH resolution CONFig RESOL High resolution should be selected if very small changes of the measured values are to be displayed To minimize ...

Page 56: ...s in setting the integration time equal to the period of the envelope modulation Low frequency envelope modulation can also occur for digitally modulated radio signals it is caused by the so called idle bursts which are regularly about all 60 ms for GSM in serted into the transmitted signal Reducing the integration time will slightly increase the speed for triggered measurements provided that the ...

Page 57: ...IEEE command SENSe POWer REFerence 0 0258 W 2 3 8 2 SWR ALARM SWR Monitoring The CONFig SPEC SWR ALARM function is used to configure a mechanism for monitoring the SWR of the load so that a warning can be output in the form of an acoustic or electrical signal The menu item SWR ALARM described here is used to define the conditions under which an alarm is to be triggered The type of alarm has to be ...

Page 58: ... The KEY menu allows configuration of the relative indication The relative difference can be indi cated in or dB relative to the stored reference power CONFig KEY Either the currently measured power value REF key in manual mode or any other value can be en tered as reference value see Section 2 3 8 1 Selection Description Available o o Deviation of measured power from reference power in per cent 1...

Page 59: ... between SWR and any of these display modes Selection Description Unit Available RL Return loss RL P P F R 10 log dB Sensor RFR Power ratio reverse forward F R P P RFR 100 Sensor R CO Reflection coefficient R CO P P R F No unit Sensor REV PWR Reverse power PR W dBm Sensor The SWR is the dimensionless quotient SWR P P P P R F R F 1 1 with the forward power PF and the reverse power PR Preset R CO IE...

Page 60: ...USER 1 8 GHz USER SET1 SET2 SET3 CORR SET3 SET2 SET1 470 MHz MEAS POS LOAD SOURCE DIRECTION AUTO 1 2 2 1 ZERO EXEC CALDATA SET1 SET2 SET3 FREQ 01 FREQ 01 FREQ 01 200 kHz CF12 01 85 4 CF21 01 89 3 FREQ 02 400 kHz CF21 18 105 8 for sensors NRT Z for sensors NAP Z OFFSET 1 08 dB OFFSET 1 08 dB MODULATION OFF IS95 WCDMA DVB T DAB CHIP RATE 4 100 M S Fig 2 6 CORRection menu 深圳德标仪器 135 1095 0799 ...

Page 61: ...lable USER User defined frequency setting Entry of the test frequency is requested in a submenu For NAP sensors the appropri ate calibration data set must be selected first Always DEF For NRT sensors the default frequency stored in the sensor is used for correction and indicated on the display The de fault frequency is sensor specific and usually lies in the middle of the frequency range in which ...

Page 62: ... IEC IEEE Command CALibration0 STATe1 OFF Calibration dataset 2 and CALibration0 STATe3 OFF Corr frequency 1 2 GHz CALibration0 STATe2 ON SENSe0 FREQuency CW FIXed 1 2GHz 2 4 2 ZERO Zeroing In particular thermal effects such as screwing the sensor to a hot RF connector may cause a forward and reverse power indication other than zero without an RF signal being applied This disturbance re ferred to ...

Page 63: ...o transmitters NRT Z Preset OFF IEC IEEE command SENSe n DM STATe ON OFF SENSe n DM STANdard IS95 WCDMa DVBT DAB Notes The deviations which can be compensated with the command group CORRection MODULATION are proportional to power for the AVG and AV BRST functions Since they are only a few per cent at nominal power 30 W for NRT Z43 120 W for NRT Z44 the modulation correction will practically have n...

Page 64: ...tter or input connector of the antenna is often not directly accessible the NRT also requests the entry of a cable loss OFFSET between the sensor connection and the desired measurement point see below Selection Description Available LOAD Measurement of forward and reverse power at the load connector always SOURCE Measurement of forward and reverse power at the source connector MK Preset depending ...

Page 65: ...he transmitter via a short cable with a transmission loss of 0 45 dB Appropriate setting of the NRT Measurement position SOURCE with an offset value of 0 45 dB If no transmis sion loss OFFSET is taken into account the measured output power of the transmitter is 0 45 dB i e 10 smaller than the real value Example 2 Measurement of the matching of an antenna The sensor is connected to the input of the...

Page 66: ... as reverse power This can be avoided by fixing the direction of the forward power in the CORRection DIRECTION menu Selection Description Available AUTO Automatic selection of power flow direction The greater of the two powers measured by the sensor is assumed to be the forward power Sensor 1 2 The forward power direction is fixed from port 1 to port 2 Sensor 2 1 The forward power direction is fix...

Page 67: ...a the CALDATA menu the NRT provides memory space for the calibration factors of three sensors in the form of three data sets CORRection CALDATA Selection Description Available SETm Data set for entry of the calibration factors for one NAP sensor m 1 2 3 Always The calibration factors can be entered as soon as the desired data set has been selected with the input key The user is then prompted to en...

Page 68: ...r the last value by pressing a key outside the menu field Unit Hz for frequency for calibration factors Via IEC IEEE bus frequency values and calibration factors are entered separately in complete lists CALibration0 FREQuency m DATA 200E3 400E3 80E6 Frequency list CALibration0 LOAD m DATA 85 4 91 2 102 3 CF12 CALibration0 SOUR m DATA 87 2 92 4 99 1 CF21 m number of data set 1 2 3 LOAD CF12 SOUR CF...

Page 69: ...isplay configuration SHOW keyboard lock KEYBOARD LOCK Call up the menu with the UTIL key SETUP RECALL SAVE RECALL 1 IEC ADDR 12 BAUD 1200 2400 4800 9600 REMOTE IEC RS232 OFF AFTER CHARGE OFF RUN AUTO OFF NO 5MIN 20MIN 2H BEEPER OFF SWR ALARM ON TEST LCD KEY MEM SENS ELAPSED TIME 159H RFL HIGH INBND OUTBND PWR HIGH INBND OUTBND OUT POWER REFL UTIL SAVE 4 BATT TIME 4 5H MODE XON XOFF RTS CTS SENSORS...

Page 70: ...o avoid the renewed entry of all parameters on changing the setting the instrument provides four memories for storing complete configurations for the sensors connected The setup memories can be accessed via the SETUP menu UTILity SETUP Selection Description Available RECALL Recalling setup Always SAVE Storing setup Always It is possible to load a stored configuration with the numeric parameter UTI...

Page 71: ...l command given UTILity AUTO OFF With fully charged battery and a sensor connected the NRT can be operated without interruption for approx 8 hours The automatic switchoff saves power during the non operational periods and leads to a prolonged effective operating time of the battery This menu is only provided if Battery Option NRT B3 is fitted Selection Description Available NO The power saving mod...

Page 72: ...ry except for manual stop of charging see Section 2 5 6 Preset none last setting Unit H hour IEC IEEE command none 2 5 5 AFTER CHARGE Automatic Switchoff after Charging The NRT can switch off automatically after charging This feature should be used whenever the battery is to be fully recharged at the end of a working day eg overnight and the instrument is not to remain in operation after charging ...

Page 73: ...tedly as this may cause damage in the long run This menu is only available if Battery Option NRT B3 is fitted Selection Description Available ON Start charging NRT B3 OFF Terminate charging NRT B3 Preset none last setting IEC IEEE command CONTrol POWer BATTery CHARge LOAD 2 5 7 BEEPER Alarm Message Acknowledge Signal The UTILity BEEPER menu allows the tone generator to be configured in such a way ...

Page 74: ...e and the handshake mode Always OFF With this setting both interfaces are switched off This is to save power and to extend the battery operation time Always Preset IEC IEEE IEC IEEE command none a Setting the device address on the IEC IEEE bus UTILity REMOTE IEC IEC ADDR Range 0 to 30 Preset none last setting Factory setting 12 IEC IEEE bus SYSTem COMMunicate GPIB SELF ADDRess 12 b Setting the ser...

Page 75: ...artner it should be considered that the NRT is basically set for the transmission of 10 bits 1 start bit 8 data bits 1 stop bit no parity bit 2 5 9 AUX IO Configuration of IN OUT Connector In the UTILITY AUX IO menu the function of the BNC connector AUX TTL is set This connector is for universal use and located on the rear panel of the instrument UTILity AUX IO Selection Description Available OFF ...

Page 76: ...ENSe n POWer REFLection RANGe LIMit STATe OFF SENSE n SWR SIGNal NONe BEEPer TRIGger SOURce EXTernal The remote control commands for the OUT and SWR ALARM modes are described in the following sections 2 5 9 1 Configuration as a Monitoring Output Selection of Bargraph In the OUT menu the bargraph to which the output signal is to be referred is selected UTILity AUX IO OUT Selection Description Avail...

Page 77: ...NBound OUTBound TRIGger TRIGger SOURce INTernal SENSE n SWR SIGNal NONe BEEPer SENSe n POWer POWer RANGe LIMit STATe OFF SENSe n POWer REFLection RANGe AUTO OFF SENSe n POWer REFLection RANGe LIMit STATe ON REFL SENSe n POWer REFLection RANGe LIMit DETect HIGH INBound OUTBound 2 5 9 3 Selection of Output Level for SWR Alarm This menu item is used to configure the electrical output signal in the ca...

Page 78: ... in dB e g 2 04dB Always 1 The correction frequency is not displayed when a NAP sensor without frequency response correction default is used 2 The cable attenuation is not displayed for an attenuation value of 0 dB In this case the frequency is displayed with a unit MHz GHz Preset FREQ IEC IEEE command none 2 5 11 TEST Built in Tests The TEST menu allows a selftest of the various NRT components UT...

Page 79: ... type and firmware version number Always Afterwards one of the four cursor keys e g can be pressed to display the error messages which may exist e g TEMPERATURE ERR CAL VALUES CHECKSUM ERR Via IEC IEEE bus the error messages can be queried using TEST SENSor see Section 3 5 14 Preset none function call IEC IEEE command TEST ALL Memory test 2 5 12 ELAPSED TIME Elapsed Time Meter ELAPSED TIME is a va...

Page 80: ...NRT setting against unauthorized access UTILity KEYBOARD LOCK Selection Description Available OFF Keyboard not locked always ON Keyboard locked always Preset OFF IEC IEEE command none To return to the keyboard not locked state switch off the power and switch it on again If the NRT is connected to the AC supply it is absolutely necessary to unplug the power cable If option NRT B3 is fitted remove a...

Page 81: ... writ ten in QuickBASIC Note In contrast to manual control which is intended for maximum possible operating convenience the priority of remote control is the predictability of the device status This means that when in compatible settings e g simultaneous activation of an average AVG and PEP measurement are attempted the command is ignored and the device status remains unchanged i e is not adapted ...

Page 82: ...he controller under DOS to configure the controller interface mode com x 9600 n 8 1 x 1 or 2 according to connector used Create the following ASCII file at the controller for m insert the number of the sensor port used 0 NRT B1 1 front panel connector RST CLS WAI Reset instrument SENS m FREQ DEF Frequency response correction SENS m POW REF 27dBm Set reference power to 27 dBm SENS m FUNC POW FORW A...

Page 83: ... resets the NRT automatically from cyclic to external triggering All other settings remain unaffected 3 2 1 Remote Control via IEC Bus 3 2 1 1 Setting the Device Address The IEC IEEE bus address of the instrument is factory set to 12 It can be changed manually in the UTILity REMOTE IEC IEC ADDR menu or via IEC bus Addresses 0 to 30 are permissible Manually Call UTILity REMOTE IEC IEC ADDR menu Ent...

Page 84: ...nual operation In contrast to standard IEEE 488 2 the NRT is reset from external to cyclic triggering upon returning to manual operation All other settings remain unaffected 3 2 2 Remote Control via RS 232 Interface 3 2 2 1 Setting the Transmission Parameters To enable an error free and correct data transmission the parameters of the unit and the controller must be set identically To prevent any p...

Page 85: ...t on all devices connected to the IEC bus without previous addressing ad dressed commands only act on devices previously addressed as listeners The interface messages relevant to the NRT are listed in Annex A 1 4 Some control characters are also defined for the control of the RS 232 interface see Annex A 2 4 3 3 2 Device Messages Commands and Device Responses Device messages are transferred via th...

Page 86: ...irrespective of the type of instrument or manufacturer The goal of the SCPI consortium is to standardize the device specific commands to a large extent For this purpose a model was developed which defines the same functions inside a device or for different devices Command systems were generated which are assigned to these functions Thus it is possible to address the same functions with identical c...

Page 87: ... tem Example SENSe n This key word denotes the command system SENSe n For commands of lower levels the complete path has to be specified starting on the left with the highest level the individual key words being separated by a colon Example SENSe n POWer POWer RANGe LIMit STATe ON This command is located on the sixth level of the SENse system It switches on the control function for the power indic...

Page 88: ...ix Long and short form The key words feature a long form and a short form Either the short form or the long form can be entered other abbreviations are not permissible Example STATus QUEStionable ENABle 1 STAT QUES ENAB 1 Note The short form is marked by upper case letters the long form cor responds to the complete word Upper case and lower case nota tion only serves to distinguish the two forms i...

Page 89: ... is represented in its full length and contains two commands separated from each other by the semicolon Both commands are part of the SENse command sys tem subsystem BURSt i e they have two common levels When abbreviating the command line the second command begins with the level below SOURce FM The colon after the semicolon is omitted The abbreviated form of the command line reads as follows CALL ...

Page 90: ...e In the case of physical quantities the unit can be entered Permissible unit prefixes are G giga MA mega MOHM and MHZ are also permissible K kilo M milli U micro and N nano It the unit is missing the basic unit is used Example SENSe1 FREQuency 1 5 GHz is equivalent to SENSe1 FREQuency 1 5E9 Special numerical The texts MINimum MAXimum DEFault UP and DOWN are interpreted as values special numerical...

Page 91: ...he text is provided Example Setting command INPut2 PORT POSition SOURce Query INPut2 PORT POSition Response SOUR Strings Strings must always be entered within quotation marks or Example SENSe1 FUNCtion ON POWer FORWard AVERage or SENSe1 FUNCtion ON POWer FORWard AVERage Block data Block data are a transmission format which is suitable for the transmission of large amounts of data A command using a...

Page 92: ...vel The semicolon separates two commands of a command line It does not alter the path The comma separates several parameters of a command The question mark forms a query The asterisk marks a common command Double or single quotation marks introduce a string and terminate it The double dagger introduces block data A white space ASCII Code 0 to 9 11 to 32 decimal e g blank separates header and param...

Page 93: ...dicated which do not have a query form which have only one query form which are implemented only in conjunction with a certain option of the instrument Indentations The different levels of the SCPI command hierarchy are represented in the table by means of indentations to the right The lower the level is the far ther the indentation to the right is Please observe that the complete com mand syntax ...

Page 94: ...ct of the command is different depending on which parameter is entered Example Selection of the parameters for the command SENSe RRESolution LOW HIGH If the parameter HIGH is selected the measurement is per formed with higher accuracy Key words in square brackets can be omitted when composing the header cf Section 3 5 2 Optional Keywords The full command length must be accepted by the instrument f...

Page 95: ...s equivalent to the command TRG However the measured values are transmitted as binary data CALL IBWRT sensor READ CALL IBRD sensor Measvalue PRINT Measvalue Indication e g 18 Qç Í TRIG The command TRIG Subsystem TRIGger only triggers a measurement After the measurement is terminated the result can be queried any time by sending the command SENS n DATA With the command WAI written in the same comma...

Page 96: ...ation specific commands Examples for querying the measured results flag 0 lp TRUE WHILE lp TRUE Reading the data within a loop IF flag 1 THEN triggered measurement terminated CALL IBWRT sensor SENS n DATA query data CALL IBRD sensor Measval PRINT current meas value Measval and print them flag 0 PEN ON Activate SRQ again END IF WEND STOP End of program Srq Service Request Routine CALL IBRSP sensor ...

Page 97: ...be connected to the NRT and individually addressed In remote control mode switchover between the individual measurement channels is effected by the numeric suffix n see section 3 5 1 Most commands triggering sensor specific settings or querying measured values contain the numeric suffix in the first keyword e g in SENS1 FREQ DEF for switching off the frequency response correction in channel 1 Comm...

Page 98: ... Commands Command Parameter Remark CLS Clear Status no query ESE 0 255 Event Status Enable ESR Standard Event Status Query only query IDN Identification Query only query IST Individual Status Query only query OPC Operation Complete OPT Option Identification Query only query PRE 0 255 Parallel Poll Register Enable PSC 0 1 Power On Status Clear RCL 0 4 Recall no query RST Reset no query SAV 1 4 Save...

Page 99: ...RY returns the contents of the IST flag in decimal representation 0 1 The IST flag is the status bit which is sent during a parallel poll cf Section 3 7 3 2 IST Flag and Parallel Poll Enable Register PPE OPC OPERATION COMPLETE sets bit 0 in the event status register when all preceding commands have been executed This bit can be used to initiate a service request cf Section 3 6 OPT OPTION IDENTIFIC...

Page 100: ...is command determines under which conditions a service request is triggered Query SRE reads the contents of the service request enable register in decimal representation Bit 6 is always 0 STB READ STATUS BYTE QUERY reads out the contents of the status byte in decimal representa tion TRG TRIGGER triggers a measurement The result can be directly read with an IEC readout com mand e g IBRD See Section...

Page 101: ...in max values which covers the measurement functions set under subsystem SENSE n FUNCtion ON measure ment function The min max memories are automatically reset upon start During a search for the max min values the value set under subsystem CALCulate n LIMit TYPE maximum minimum or the difference thereof is returned to a request for data not however the currently measured value The request for data...

Page 102: ... 1 No RF power shall be applied to the sensor during zeroing Example CAL2 ZERO No RST value Zeroing must be completed before a new measurement can be started The command WAI allows to recognize the end of a zeroing procedure An error status request allows to check whether the ze roing procedure was performed successfully CALL IBWRT sensor CAL n ZERO WAI test 1 WHILE test 1 CALL IBWRT sensor SYST E...

Page 103: ...e specified by the manufacturer ie starting with the lowest value The individual frequencies are to be separated by a comma Example CAL0 FREQ2 DATA 0 9E9 1 0E9 2 0E9 No RST value CALibration0 LOAD m DATA Calibration Factor Array CF12 This command is used to transfer the calibration factors for measurement direction 1 2 CF12 into the selected calibration data set The sequence should be in accordanc...

Page 104: ...uery the response is whether the battery is being charged or not The command executes a function and therefore has no RST value Example CONT POW BATT CHAR LOAD CONT POW BATT CHAR Response 1 CONTrol POWer BATTery ACHarge OFF RUN This command causes the basic unit to switch off after the battery has been charged OFF Example CONT POW BATT ACH OFF RST value RUN CONTrol POWer STATe ON OFF This command ...

Page 105: ... meter can be output on the NRT Table 3 7 DIAGnostic subsystem Command Parameter Unit Notes DIAGnostic INFO OTIMe h Query only DIAGnostic INFO OTIMe This command returns the count of the built in elapsed time meter The count is always output in hours h and cannot be changed from outside The command is in the form of a query and therefore has no RST value Example DIAG INFO OTIM Response e g 27 深圳德标...

Page 106: ...Nimum MAXimum DEFault This command allows the transmission loss in a cable connecting the desired measurement point and the sensor to be taken into account If the measurement position is set to LOAD INPut n PORT POSition LOAD the cable is assumed to be connected between the sensor and the load otherwise between the sensor and the source Example INP1 PORT OFFS 1 25 RST value sensor dependent INPut ...

Page 107: ...ard direction the direction in which the greater power flows is taken as the forward direction If the automatic assignment is switched off eg to obtain a clear assignment in the case that forward and reverse power are almost equal the orientation of the sensor is to be defined with the command INPut n PORT SOURce Example INP2 PORT SOUR AUTO OFF RST value sensor dependent 深圳德标仪器 135 1095 0799 ...

Page 108: ...el connector on option NRT B1 1 Front panel connector standard 2 3 Rear panel connectors option NRT B2 Note The keyword SENSe may be omitted for n 1 so that the following two commands are equivalent SENSe1 FUNCTion POWer FORWard AVERage FUNCTion POWer FORWard AVERage Table 3 9 SENSe subsystem Command Parameter Unit Notes SENSe n BANDwidth BWIDth VIDeo FNUMber f Settings are sensor dependent see ta...

Page 109: ...ription DATA SENSe Measurement Function SENSe Measurement Function dependg on UNIT Query only See command description INFormation Query only Sensor dependent POWer APERture 0 005s 0 111s MINimum MAXimum DEFault s Settings are sensor dependent REFerence 0 to 100E6W 200 to 200dBm MINimum MAXimum W dBm CCDFunction REFerence 0 to 100E6W 200 to 200 dBm MINimum MAXimum W dBm dB POWer RANGe AUTO ON OFF L...

Page 110: ...easurement function SENSe n BURSt MODE AUTO USER This command instructs the NRT how to measure the average burst power see also Section 2 3 1 3 Average Burst Power AUTO The sensor automatically recognizes the duty cycle of the burst series and calculates the average burst power from this duty cycle and the average power An appropriate video bandwidth has to be set see hints in Section 2 3 1 3 For ...

Page 111: ...cified sensor The entered frequency value is required to correct the frequency dependent response of the sen sor For this purpose NRT sensors contain a ROM with all sensor specific data For NAP sensors frequency dependent calibration factors can be entered via the CALibration system see Section 3 5 7 CALibration Subsystem Example SENS1 FREQ 10 MHz RST value DEF sensor dependent SENSe n RRESolution...

Page 112: ...n This command switches on a specified measurement function If this command is in the form of a query the headers of all switched on measurement functions maximum of two functions are returned The command is a function call or query and therefore has no RST value The following measurement functions are available POWer CFACtor Crest Factor Sensor POWer FORWard AVERage Average power forward Always P...

Page 113: ...ns are queried The responses are given in the sequence of the measurement functions listed under SENS n FUNC ON The command is a query and therefore has no RST value Example SENS2 DATA POW FORW AVER returns the measured result for the average forward power Response 10 SENSe n INFormation This command returns the condensed data of the sensor in form of an ASCII string Example SENS2 INF Response sen...

Page 114: ...are automati cally adapted to the current measured value If autoranging is switched off the limits and hence the scale remain fixed Example SENS1 POW RANG AUTO OFF RST value ON SENSe n POWer POWer RANGe LIMit STATe ON OFF This command can be used to define the AUX TTL connector as a monitoring output for the power indication ON state In OFF state the connector may be defined either as a monitoring...

Page 115: ...alue 1 0 UNIT1 POW DBM SENSe n POWer REFLection RANGe This node provides all commands for setting the righthand bargraph reflection indication and for configuring the AUX TTL connector as an output for monitoring the matching Note Differing from the specifications of the SCPI Standard for RANGe commands these command do not set the measurement range of the NRT but only define a display or toleranc...

Page 116: ...e 1 0 may mean matching SWR indication or total mismatch indication of reflection coeffi cient The entered numeric value remains the same when another display mode is selected SWR return loss reflection coefficient or reverse power so that a change of the display mode also changes the meaning of the scale limit For the entered scale limit to become effective the automatic scaling of the bargraph h...

Page 117: ...WR LIM 15 RST value 100 MW SENSe n SWR SIGNal NONE BEEPer TTLSignal BOTH This command controls the output of the SWR alarm The setting BEEPer generates an acoustic output TTLSignal outputs an electrical signal via rear panel connector AUX TTL BOTH an acoustic and electrical alarm The settings available with this command have to be made via the UTIL AUX IO and UTIL BEEPER menus in manual operation ...

Page 118: ...Tus OPERation register Read ing the EVENt register clears it Example STAT OPER EVEN STATus OPERation CONDition This query returns the contents of the CONDition register of the STATus OPERation register Reading the CONDition register is nondestructive The returned value directly reflects the current hardware status Example STAT OPER COND STATus OPERation PTRansition 0 to 32767 This command Positive...

Page 119: ...tion register is nondestructive The returned value directly reflects the current hardware status Example STAT QUES COND STATus QUEStionable PTRansition 0 to 32767 This command Positive Transition sets the positive transition filters of all bits of the STAus QUEStionable register for the transitions of the CONDition bits from 0 to 1 Example STAT QUES PTR 32767 STATus QUEStionable NTRansition 0 to 3...

Page 120: ...0 19200 MINimum MAXimum DEFault XON NONE OFF BFULL RFR Baud Query only No query Query only SYSTem BEEPer STATe ON OFF This command switches the beeper on or off Example SYST BEEP STAT ON RST value OFF SYSTem COMMunicate This node provides the commands for setting the remote control channels SYSTem COMMunicate GPIB This node provides the commands for checking the IEC IEEE bus GPIB General Purpose I...

Page 121: ...m COMMunicate SERial CONTrol RTS OFF IBFULL RFR This command switches the hardware handshake mode off OFF or on IBFull RFR Example SYST COMM SER CONT RTS OFF RST value none last setting SYSTem ERRor This query returns the next item from the error queue and removes that item from the queue Positive error numbers denote device specific errors negative error numbers denote the error messages defined ...

Page 122: ...est functions except TEST DIRect either return 0 or 1 with 0 standing for no error and 1 for error TEST ROM The command tests the program ROM This command is a query and therefore has no RST value Example TEST ROM Response 0 TEST RAM The command tests the RAM This command is a query and therefore has no RST value Example TEST RAM Response 0 TEST FRAM The command tests the parameter memory This com...

Page 123: ...xample TEST DIR sensor command TEST SENSor This command returns the status of the active sensor Example TEST SENS The response is sensor dependent and could read as follows NRT Z44 V1 40 TEMPERATURE ERR CAL VALUES CHECKSUM ERR The response always contains an identification string for the sensor with the type name and the FW version number In case of an error error messages in plain text are append...

Page 124: ...wing measurements INTernal The internal timer is used as a trigger source As a result the measurement is per formed in the freerun mode This implies that the sensor carries out measurements permanently but that they are not related to the test signal The NRT provides the last measured value upon a query command SENSe n DATA EXTernal This mode allows to trigger measurements via the two remote contr...

Page 125: ... below W power in W DBM power level in dBm Example UNIT0 POW REL STAT OFF UNIT0 POW DBM RST value W UNIT n POWer RELative PCT DB This command allows the forward power FWD and the absorbed power F R to be indicated in relative display mode For the setting to become effective the relative display mode must be switched on see command UNIT n POWer RELative STATe ON further below PCT deviation from ref...

Page 126: ... power ratio R F in percent SWR standing wave ratio 1 to without unit RL return loss in dB RCO reflection coefficient 0 to 1 without unit RFR Ratio between forward and reverse power 0 to 100 Note This command is only effective if the measurement function POW S11 or POW REFL see SENSe n FUNC subsystem has been activated Example SENSe1 FUNC POW REFL UNIT1 POW REFL RCO RST value SWR 深圳德标仪器 135 1095 0...

Page 127: ...nit The input unit receives commands character by character from the IEC bus and collects them in the input buffer The input unit sends a message to the command recognition as soon as the input buffer is full or as soon as it receives a delimiter PROGRAM MESSAGE TERMINATOR as defined in IEEE 488 2 or the interface message DCL If the input buffer is full the IEC IEEE bus traffic is stopped and the ...

Page 128: ...alues e g frequency into the data set however only passes them on to the hardware when requested by the command recognition As this is always only effected at the end of a command line the order of the setting commands in the command line is not relevant The data are only checked for their compatibility among each other and with the instrument hardware immediately before they are transmitted to th...

Page 129: ...n one command line are not absolutely serviced in the order in which they have been received In order to make sure that commands are actually carried out in a certain order each command must be sent in a separate command line that is to say with a separate IBWRT call In order to prevent an overlapping execution of commands one of commands OPC OPC or WAI must be used All three commands cause a cert...

Page 130: ...stem The IST flag like the SRQ combines the entire instrument status in a single bit The PPE fulfills an analog function for the IST flag as the SRE for the service request The output buffer contains the messages the instrument returns to the controller It is not part of the status reporting system but determines the value of the MAV bit in the STB and thus is represented in Fig 3 4 3 7 1 Structur...

Page 131: ... the last read ing it is the memory of the condition part It only indicates events passed on by the edge filters It is permanently updated by the instrument This part can only be read by the user Upon reading its contents is set to zero In colloquial language this part is often equated with the entire register ENABle part The ENABle part determines whether the associated EVENt bit contributes to t...

Page 132: ...ror Device Dependent Error Query Error Request Control Operation Complete 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 not used vacant vacant vacant vacant vacant CALCulating BOPerating vacant vacant Waiting for Trigger MEASuring vacant vacant SETTing vacant not used vacant vacant vacant ABURst SERRor SINFinite vacant vacant vacant vacant vacant POWer...

Page 133: ...d specified in greater detail by polling the error queue The poll provides an informative error message This procedure is to be recommended since it considerably reduces the problems involved with IEC IEEE bus control 3 QUEStionable status sum bit The bit is set if an EVENt bit is set in the QUEStionable status register and the associated ENABle bit is set to 1 A set bit indicates a questionable i...

Page 134: ... when all previous commands have been executed 2 Query Error This bit is set if either the controller wants to read data from the instrument without having sent a query or if it does not fetch requested data and sends new instructions to the instrument instead The cause is often a query which is faulty and hence cannot be executed 3 Device dependent Error This bit is set if a device dependent erro...

Page 135: ... instrument performs a limit check 3 7 3 5 STATus QUEStionable Register This register contains information on questionable instrument states They can occur e g if the instru ment is operated outside its specified range It can be queried using one of the commands STATus QUEStionable CONDition or STATus QUEStionable EVENt Table 3 19 Meaning of the bits used in the STATus QUEStionable register Bit No...

Page 136: ...bines the information of a further register the error queue or the output buffer The corresponding setting of the ENABle parts of the status registers can achieve that arbitrary bits in an arbitrary status register initiate an SRQ In order use the possibilities of the service request effectively all bits should be set to 1 in the enable registers SRE and ESE Examples cf Fig 3 4 Section 3 7 2 and A...

Page 137: ...inverted The parallel poll itself is executed using IBRPP The parallel poll method is mainly used in order to quickly find out after an SRQ which instrument has sent the service request if there are many instruments connected to the IEC bus To this effect SRE and PPE must be set to the same value A detailed example for a parallel poll can be found in Annex D Programming Examples 3 7 4 4 Query by M...

Page 138: ... On Status Clear Device Clear Selected Device Clear RST or SYSTem PRESet STATus PRESet CLS Effect 0 1 Clear STB ESR yes yes Clear SRE ESE yes Clear PPE yes Clear EVENt parts of the registers yes yes Clear ENABle parts of all OPERation and QUES Tionable registers Fill ENABle parts of all other registers with 1 yes yes Fill PTRansition parts with 1 Clear NTRansition parts yes yes Clear error queue y...

Page 139: ...arts 4 1 2 Replacing the Battery Option NRT B3 Press in center Insertion of battery OBEN Press Removal of battery Press Withdraw Fig 4 1 Insertion and removal of battery The NiMH battery used in the NRT is a high performance battery with a lifetime of typically more than 200 charge discharge cycles The battery should be replaced if the operating time with a Sensor NRT Z44 is less than 4 hours Spar...

Page 140: ...he AC supply after at least three hours battery operation time Charging is always indicated by the danger arrow symbol above the battery sym bol lighting up Charging of a fully discharged battery should be completed after max 2 5 hours danger arrow symbol disappears Although all important pa rameters including the battery temperature are continuously monitored during charging please observe the fo...

Page 141: ... together with the flashup program in the form of a packed self extracting archive with the file name NRTxxx EXE The string xxx represents the version number of the software Installing the flashup software on the PC First generate a new empty directory on drive c e g C NRT Copy the file NRTxxx EXE to directory C NRT Next execute the program file under DOS or Windows This unpacks the file into the ...

Page 142: ... Enter or c Enter Select the directory c NRT where the flashup software was installed CD NRT Enter If the cable is connected to interface COM1 start FLASHPRO with the command FLASHPRO NRT40_1 CNF The rest of the job is carried out by FLASHPRO without any further action being required If the cable is connected to interface COM2 start FLASHPRO with the command FLASHPRO NRT40_2 CNF The rest of the jo...

Page 143: ...157B75 1 R 127 UHPRYH OLQN RU SRZHU RII WDUJHW ZKLOH SURJUDP LV UXQQLQJ Sending of the transfer program NRT TRA BIN is thus signaled 5 6 6 352 DWFKPRGH 9 QUW FQI HFXWLQJ FRPSOHWH SURJUDPPLQJ SURFHGXUH 7DVN LOH 6WDUWDGU HQJWK 3URJUHVV RRWVWUDS 2 7UDQVIHU 157B75 1 2 UDVLQJ 0 R 127 UHPRYH OLQN RU SRZHU RII WDUJHW ZKLOH SURJUDP LV UXQQLQJ The blocks of the flash EPROM to be programmed are erased to en...

Page 144: ...and programmed After transfer of the last byte the program verifies correct transmission of all data and returns a corre sponding message to the FLASHPRO The firmware has been properly transferred if the following mes sage is displayed 5 6 6 352 DWFKPRGH 9 QUW FQI HFXWLQJ FRPSOHWH SURJUDPPLQJ SURFHGXUH 7DVN LOH 6WDUWDGU HQJWK 3URJUHVV RRWVWUDS 2 7UDQVIHU 157B75 1 2 UDVLQJ 0 2 3URJUDP 157 1 2 0 2 R...

Page 145: ...r message 5 6 6 352 DWFKPRGH 9 QUW FQI HFXWLQJ FRPSOHWH SURJUDPPLQJ SURFHGXUH 7DVN LOH 6WDUWDGU HQJWK 3URJUHVV RRWVWUDS UURU 2 7UDQVIHU RVW 0HVVDJH 7LPHRXW RQ FRP DW WUDQVIHUULQJ WUDQVIHU SURJUDP 2 R 127 UHPRYH OLQN RU SRZHU RII WDUJHW ZKLOH SURJUDP LV UXQQLQJ Further possible error sources FLASHPRO was started in a wrong directory The configuration file name entered is faulty or incomplete FLASHP...

Page 146: ...nual should be carried out prior to an attempt to repair Note All errors indicated on the display can be recalled with the command TEST SENSor via the IEC IEEE bus or serial RS 232 interface see Section 3 5 14 4 4 1 Detection of Faulty Module Faults may occur on switching on when connecting a sensor or in the measurement mode The causes of faults are listed below according to their probability of ...

Page 147: ...n sensor Sensor Note If the NRT does not react on connecting a sensor please make sure that the appropriate sensor port is selected If the NRT does not select this port by itself remove all other sen sors switch off and restart the instrument Faults in measurement mode Fault description Cause Module LCD display failed Signal path interrupted or processor control faulty Display Board or Mainboard N...

Page 148: ...r pug Remove the battery from NRT model with option NRT B3 Hood top Hood bottom Rear foot Fig 4 3 Removing the top and bottom cover Opening the in strument Disconnect all cables power supply remote control sensors Undo the four screws of the two rear panel feet Push the top cover towards the rear panel and detach it Turn the instrument Push the bottom cover towards the rear panel and detach it 深圳德...

Page 149: ...ument see Fig 4 5 Fix the option with the two Phillips screws on the wiring side W1 Tighten the two nuts of sub D connector X1 Connect cable W1 to the Mainboard connector X1 Close the instrument Section 4 5 1 Removal To remove the option proceed in reverse order 4 5 3 Option NRT B2 Installation Open the instrument Section 4 5 1 Remove tow round caps from the rear panel see Fig 4 5 Insert panel jac...

Page 150: ...the option from inside the instrument into the rear panel Fig 4 5 Tighten three Phillips screws Connect cable W3 to the Mainboard connector X3 The correct position of the connector is ensured by coding Close the instrument Section 4 5 1 Insert battery Removal To remove the option proceed in reverse order Option NRT B3 Main board Option NRT B1 Option NRT B2 X91 X98 X81 X88 S1 2 ON position Fig 4 5 ...

Page 151: ...rd and disconnect power plug Undo the two Phillips screws on power supply case and remove module Fig 4 6 Installation To install the power supply proceed in reverse order Shroud Front panel with labeling Holder Switching pad Display board Main board Power supply IEC 625 bus cable Fig 4 6 Installation and removal of power supply display board and Mainboard 深圳德标仪器 135 1095 0799 ...

Page 152: ...ect 6 wire sensor connector from the Mainboard Installation To install the display board proceed in reverse order The correct position of the connectors X5 and X71 to X78 is ensured by coding 4 5 7 Mainboard Removal Open the instrument Section 4 5 1 If fitted remove options NRT B1 4 5 2 and NRT B3 4 5 4 see Fig 4 5 Disconnect all cables from the mainboard Fig 4 6 Undo two Phillips screws and remov...

Page 153: ...n 10 dB 30 to 120 MHz approx 10 W 5 1 1 5 2 5 5 2 6 3 5 Harmonics filter Attenuation a 1 dB 30 MHz 40 dB 60 MHz b 1 dB 120 MHz 40 dB 200 MHz P 10 W ATS OW 1000 1755 04 5 1 1 5 2 5 5 2 6 3 6 NAP power sensors Type specific NAP Z3 NAP Z4 NAP Z5 NAP Z6 NAP Z7 NAP Z8 NAP Z9 NAP Z10 NAP Z11 392 6610 55 392 6910 55 392 7116 55 392 7316 54 350 8214 02 350 4619 02 392 5513 55 858 0000 02 04 852 6707 02 04...

Page 154: ... Faults are located according to Section 4 4 Trouble Shooting Further tests can be triggered in the UTILity TEST menu Section 2 5 11 Test Built in Tests 5 2 1 Switch On Sequence Preparation Connect the NRT without sensors to the AC supply Test The NRT should be automatically switched on without actuation of the ON STBY key Switch off and restart the NRT using the ON STBY key 5 2 2 Display and Keyp...

Page 155: ...ep tested memory OK should be displayed 5 2 3 Remote Control The interfaces are checked by means of a communication test between the NRT and the PC connected The DUT should respond to the message sent by the PC by returning a string containing the identifica tion data of the NRT Measuring equipment Process controller Table 5 1 Ref No 10 5 2 3 1 IEC IEEE BUS IEC625 IEEE488 Interface Preparation Con...

Page 156: ... NRT Z44 to sensor port 1 front panel The messages FOUND SENSOR s 1 and INITIALIZING must be displayed one after another The applied power should then be displayed In case of fault the error message SENS WARN will be displayed 5 2 5 AUX Interface The test is made with constant forward power by changing the conditions for the output of TTL high level within out of bargraph indication range Preparat...

Page 157: ...and INITIALIZING must be displayed one after another Measured values should then be displayed In case of fault the error message SENS WARN will be displayed 5 2 6 2 Zeroing Preparation Arrange test setup as shown in 5 1 1 Set the measurement mode with the AVG ENV function key to AVG the meas urement unit with the dBm W key to W Configure the display via the submenus CONFIG RESOL HIGH CONFIG POWER ...

Page 158: ...ower 5 2 7 Option NRT B2 Check option NRT B2 two additional sensor interfaces Sensor 2 and Sensor 3 on the NRT rear panel accordingly in line with Section 5 2 4 5 2 8 Option NRT B3 The option is checked with a charged battery inserted 5 2 8 1 Switchover AC Supply Battery Operation Preparation Connect the NRT to the AC supply Switch on the NRT with the ON STBY key and wait for completion of switch ...

Page 159: ...f of Charging Preparation Connect NRT to AC supply insert battery into option NRT B3 Switch on the NRT with the ON STBY key and wait for completion of switch on process Select in the UTIL BATTERY CHARGE menu the parameter ON Test The battery charging symbol should disappear after max 2 5 hours end of charging The charging time can be considerably reduced with the battery only partly discharged If ...

Page 160: ... interface 5 2 3 1 7 RS232 interface 5 2 3 2 8 Sensor interface 5 2 4 9 AUX interface 5 2 5 10 Option NRT B1 Sensor identification NAP Z__ 5 2 6 1 11 Option NRT B1 Zeroing NAP Z__ 5 2 6 2 12 Option NRT B1 Power measurement NAP Z__ Direction 1 2 5 2 6 3 8 8 13 Option NRT B1 Power measurement NAP Z__ Direction 2 1 5 2 6 3 8 8 14 Option NRT B2 5 2 7 15 Option NRT B3 Switchover AC supply battery opera...

Page 161: ... transfer é three line handshake é high data transfer rate of max 350 kByte s é up to 15 devices can be connected é maximal length of the connecting cables 15 m single connection 2m é wired OR if several instruments are connected in parallel 12 1 13 24 shield SRQ NDAC DAV DIO4 DIO2 logic GND GND 10 GND 8 GND 6 REN DIO7 GND 11 GND 9 GND 7 DIO8 DIO6 DIO5 ATN IFC NRFD EOI DIO3 DIO1 Fig A 1 Pin Assigm...

Page 162: ...id active LOW signals a valid data byte on the data bus NRFD Not Ready For Data active LOW signals that one of the connected devices is not ready for data transfer NDAC Not Data Accepted active LOW signals that the instrument connected is accepting the data on the data bus Annex A 1 3 Interface Functions Instruments which can be remote controlled via IEC bus can be equipped with different interfac...

Page 163: ...SPE Serial Poll Enable IBCMD controller CHR 24 Ready for serial poll SPD Serial Poll Disable IBCMD controller CHR 25 End of serial poll PPU Parallel Poll Unconfigure IBCMD controller CHR 21 End of the parallel poll state Addressed Commands Addressed commands are encoded in the range 00 through 0F hex They are only effective for instruments addressed as listeners Table A 3 Addressed Commands Comman...

Page 164: ...nt of the RS 232 C interface Annex A 2 2 Signal lines RxD Receive Data Input data line for transmitting from remote station to local terminal TxD Transmit Data Output data line for transmitting from local terminal to remote station DTR Data Terminal Ready Output log 0 active with DTR the instrument indicates that it is ready to receive data GND Ground Interface ground connected to instrument groun...

Page 165: ...f the start bit indicates the beginning of the data byte Parity bit No parity bit is used Stop bit The transmission of a data byte is terminated by a stop bit Example Transmission of character A 41 hex in the 8 bit ASCII code 01 02 03 04 05 06 07 08 09 10 Bit 01 Start bit Bit 02 09 Data bits Bit 10 Stop bit Bitduration 1 baud rate Annex A 2 4 Interface functions For interface control some control ...

Page 166: ... as long as the serial interface is active The DTR line controls whether the instrument is ready for reception or not Connection between instrument and controller null modem cable R S 1050 0346 00 The connection of the instrument to a controller is made with a so called null modem cable Here the data control and signalling lines must be crossed The following wiring diagram applies to a controller ...

Page 167: ...ny entries Command Error Faulty command sets bit 5 in the ESR register Error code Error text in the case of queue poll Error explanation 100 Command Error The command is faulty or invalid 101 Invalid Character The command contains an invalid character Example A header contains an ampersand SOURCE 102 Syntax error The command is invalid Example The command contains block data the instrument does no...

Page 168: ...cter in number A number contains an invalid character Example An A in a decimal number or a 9 in an octal number 123 Exponent too large The absolute value of the exponent is larger than 32000 124 Too many digits The number contains too many digits 128 Numeric data not allowed The command contains a number which is not allowed at this position Example Command SENSe n FUNCtion ON requires specificat...

Page 169: ...The command contains faulty block data 161 Invalid block data The command contains faulty block data Example An END message is received before the expected number of data was received 168 Block data not allowed The command contains valid block data at an illegal position 170 Expression error The command contains an invalid mathematical expression 171 Invalid expression The command contains an inva...

Page 170: ...ion was ignored as another measurement was already in progress 214 Trigger deadlock The trigger signal can not be used The trigger source for the initiation of measurement is set to GET and the subsequent query is received The measurement cannot be started until a GET is received but the GET would cause an interrupted error 215 Arm deadlock The arming signal can not be used 220 Parameter error The...

Page 171: ...mass storage Example An option is not installed 252 Missing media The command can not be executed due to missing storage media Example No floppy in the floppy disk drive 253 Corrupt media The media is corrupt Example The floppy is bad or has a wrong format 254 Media full The media is full Beispiel There is no room on the floppy 255 Directory full The media directory is full 256 File name not found...

Page 172: ...rsion error The command sequence defined by the macro is trapped in a program loop Example The event that would allow the loop to be exited does not occur 277 Macro redefinition not allowed The macro label defined in the DMC command is already defined elsewhere 278 Macro header not found The header of the macro label in the GMC query is not yet defined 280 Program error Error on execution of a dow...

Page 173: ...xecuted 350 Queue overflow This error code is entered into the queue instead of the actual error code if the queue is full It indicates that an error has occurred but not been accepted The queue can accept 5 entries Query Error Error in data request sets bit 2 in the ESR register Error code Error text in the case of queue poll Error explanation 400 Query error General error occurring when data are...

Page 174: ...evice specific error sets bit 3 in the ESR register Error code Error text in the case of queue poll Error explanation 300 SWR overrange The SWR limit control signals that the SWR is beyond the limit value allowed 301 Out of Range The domain control signals the signal is outside the allowed range 深圳德标仪器 135 1095 0799 ...

Page 175: ...TA Calibration Factor Array CF21 not SCPI 3 23 CALibration0 STATe m ON OFF 3 23 CONTrol POWer BATTerry CHArge ON OFF not SCPI 3 24 CONTrol POWer BATTerry ACHarge ON OFF not SCPI 3 24 CONTrol POWer DELay 300 1200 7200 s MINimum MAXimum DEFault not SCPI 3 24 CONTrol POWer STATe ON OFF not SCPI 3 24 DIAGnostic INFO OTIMe 3 25 INPut n PORT OFFSet 0 dB 100 dB MINimum MAXimum DEFault not SCPI 3 26 INPut...

Page 176: ...CPI 3 35 SENSe n POWer REFLection RANGe LOWer 1999 0 1999 0 MINimum MAXimum DEFault not SCPI 3 36 SENSe n POWer REFLection RANGe UPPer 1999 0 1999 0 MINimum MAXi mum DEFault not SCPI 3 36 SENSe n POWer POWer RANGe AUTO ON OFF not SCPI 3 34 SENSe n POWer POWer RANGe LIMit DETect INBound OUTBound HIGH not SCPI 3 34 SENSe n POWer POWer RANGe LIMit STATe ON OFF not SCPI 3 34 SENSe n POWer POWer RANGe ...

Page 177: ...YSTem COMMunicate SERial CONTrol RTS OFF IBFull RTS 3 41 SYSTem COMMunicate SERial RECeive PACE XON NONE 3 41 SYSTem COMMunicate RECeive BAUD 1200 2400 4800 9600 MINimum MAXimum DEFault 3 41 SYSTem ERRor 3 41 SYSTem PRESet 3 41 SYSTem VERSion 3 41 TEST DIRect Sensor command 3 43 TEST FRAM 3 42 TEST RAM 3 42 TEST ROM 3 42 TEST SENSor 3 43 TEST ALL 3 42 TRIGger TRIGger SOURce INTernal EXTernal not S...

Page 178: ...深圳德标仪器 135 1095 0799 ...

Page 179: ...t status at the beginning of every program Subroutines InitController and InitDevice are used to this effect Annex D 2 1 Initialize Controller REM Initialize Controller REM InitController iecaddress 28 IEC bus address of device CALL IBFIND DEV1 sensor Open port to the instrument CALL IBONL sensor 1 CALL IBPAD sensor iecaddress Inform controller about instrument address CALL IBCLR sensor Reset IEC ...

Page 180: ...direction and the measurement is to be performed on the load side of the sensor The average of the power is selected as measured quantity The incident power is displayed in units of percent and is referred to a value of 25 Watt REM Device setting commands CALL IECOUT SENS1 FUNC CONC OFF Non concurrent functions CALL IECOUT SENS1 FREQUENCY 250E6 Frequency 250 MHz Automatic Recognition of forward di...

Page 181: ...IECOUT UNIT1 POW REL Request relative unit CALL IECIN Unit input value CALL IECOUT UNIT1 POW REL STAT Request unit status CALL IECIN UnitState input value REM Display values on screen PRINT CR frequency CRfrequency PRINT Forward direction Direction PRINT Reference plane Measpos PRINT Reference value Reference PRINT Status for average measurement FunctionState PRINT Relative unit Unit PRINT Relativ...

Page 182: ...e of OPC CALL IECOUT TRIG OPC REM here the controller can service other devices CALL IECIN OpcOk Wait for 1 from OPC i e the triggered measured result is available only then the result can be read out CALL IECOUT SENS1 DATA POW FORW AVER BURS CALL IECIN Value PRINT Measured value TRIG OPC Value REM Third option Use of OPC REM In order to use the service request function with National Instruments R...

Page 183: ...n Ptransition bits CALL IECOUT STAT QUES ENAB 32767 Set Questionable Enable bits for all events CALL IECOUT STAT QUES PTR 32767 Set associated Questionable Ptransition bits ON PEN GOSUB Srq Initialize service request routine PEN ON REM Continue main program here STOP End of program REM Srq REM Service Request Routine DO SRQFOUND 0 FOR I UserN TO UserM Poll all bus users ON ERROR GOTO noUser No use...

Page 184: ...Nt CALL IECIN Oper IF VAL Oper AND 2 0 THEN PRINT Initializing sensor IF VAL Oper AND 16 0 THEN PRINT Measurement started IF VAL Oper AND 32 0 THEN PRINT Waiting for trigger IF VAL Oper AND 256 0 THEN PRINT Battery operation IF VAL Oper AND 512 0 THEN PRINT Determination of max min values active RETURN Esrread Read Event Status register CALL IECOUT ESR Read ESR CALL IECIN Esr IF VAL Esr AND 1 0 TH...

Page 185: ...nual operation and Remote control indicate the path for setting the concerned parameter If the description of the default stat e in remote control differs from that in manual operation this is separately identified by x or y Table E 1 Default Settings Parameter Preset NRT Preset Sensor Z43 Z44 Factory Preset NRT Manual operation Remote control Key 1st level 2nd level 3rd level 4th level Remote con...

Page 186: ...OD SENSe n BURSt PERiod x Video bandwidth ÅSensor FULL x 2 CONF ENV KEY PEP CF CCDF VID BW SENSe n BANDwidth VIDeo FNUMber x CCDF threshold ÅSensor 1 W CONF ENV KEY CCDF CCDF REF SENSe n POWer CCDFunction REFerence x Power display FWD F R FWD FWD CONF POWER no equivalent Maximum value display OFF OFF CONF MAXHOLD CALCulate n LIMit STATe x Type of limit value MAX MAX CONF MAXDISP CALCulate n LIMit ...

Page 187: ...ENSe n SWR LIMit x SWR alarm threshold 100 MW 100 MW CONF SPEC SWR ALARM THRES HOLD SENSe n SWR THReshold x Relative display dB dB CONF KEY UNIT n POWer RELative x Reflection measurement function as an alternative to SWR RL RL CONF RFL KEY no equivalent Correction frequency NRT Z ÅSensor 1E9Hz ÅSensor CORR FREQ SENSe n FREQuency CW FIXED x Correction frequency NAP Z DEF DEF CORR FREQ SENSe n FREQu...

Page 188: ...n 5MIN x 300s 5MIN x 300s UTIL AUTO OFF CONTrol POWer STATe ON CONTrol POWer DELay x Mode after charging RUN RUN UTIL AFTER CHARGE CONTrol POWer BATTery ACHarge x Beeper SWR ALARM x BEEPer SWR ALAR M x BEEPer UTIL BEEPER SYSTem BEEPer STATe OFF SENSe n SWR SIGNal x Remote control interface IEC IEC UTIL REMOTE cannot be remote controlled IEC IEEE bus address no change 12 UTIL REMOTE IEC IEC ADR SYS...

Page 189: ...ing criterion for bargraphs AUX TTL connector HIGH HIGH UTIL AUX IO OUT POWER REFL PWR RFL SENSe n POWer POWer RANGe LIMit DETect x SENSe n POWer REFLection RANGe LIMit DETect x Output level for SWR alarm AUX TTL connector HIGH HIGH UTIL AUX IO SWR ALARM LOGIC LEVEL SENSe n SWR SIGNal TTLSignal LEVel x Display frequency attenuation OFFS FREQ OFFS FREQ UTIL SHOW cannot be remote controlled 深圳德标仪器 1...

Page 190: ...深圳德标仪器 135 1095 0799 ...

Page 191: ...he outside 4 1 Command addressed A 3 line structure 3 9 parameter 3 10 recognition 3 48 sequence 3 49 structure 3 6 synchronization 3 49 syntax elements 3 12 universal A 3 Common commands 3 6 3 7 3 18 Competitive measurement functions 3 31 Complementary cumulative distribution function 2 4 CONDition register 3 38 3 39 3 51 CONFig menu 2 16 Configuration IN OUT connector 2 45 interfaces and memorie...

Page 192: ...2 C A 5 IEC IEEE bus A 1 messages IEC IEEE bus A 3 RS 232 C A 4 setting 2 44 Interrupt 3 53 IST flag 3 19 K Key AVG ENV 2 11 dBm W 2 11 SWR RFL 2 11 REF 2 11 Key words commands 3 6 KEYBOARD LOCK 2 50 Keypad test 2 48 L Limit control 2 28 Limits 2 24 List of commands see Annex C Load 2 34 Load Device settings 3 20 Long form commands 3 8 Lower case commands 3 8 M Mainboard 4 14 Maintenance 4 1 Maxim...

Page 193: ... 17 PEP see Envelope Parameters Physical quantities 3 9 Positive transition filters 3 38 3 39 3 51 Power differences 2 2 Power fuses 1 5 Power measurement 2 2 forward absorbed 2 8 Power supply 4 13 Power up 1 5 Power saving function 3 24 PPE Parallel poll enable register 3 54 Preparation for Use 1 1 Programming examples see Annex D PTRansition register 3 51 Putting into operation 1 1 connect a sen...

Page 194: ...le register 3 53 SRQ service request 3 20 3 56 Standby 1 5 2 41 Standing wave ratio 2 29 Start bit RS 232 C A 5 Status byte 3 39 Status byte STB 3 39 3 53 Status register overview 3 52 structure 3 50 Status registers 3 38 Status reporting system 3 50 STATus OPERation register 3 55 STATus QUEStionable register 3 55 STB status byte 3 53 Stop bit RS 232 C A 5 Structure command 3 6 command line 3 9 Su...

Reviews:

No comments

Brands by name

Popular brands

Load more brands