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Rohde & Schwarz FPC1000, User Manual

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Rohde & Schwarz FPC1000 User Manual Download Page 149

Digital Demodulation

FPC1000

134

User Manual 1178.4130.02 ─ 02

Analyzer

Extraction of 

ideal signal

Comparison

Result display

Device under 

test (DUT)

Figure 12-1: Demodulation principle

The R&S

 

FPC1000 provides several measurements and numerical and graphical

result displays. These result displays show various aspects and characteristics of the

demodulated signal.

Selecting the measurement

The measurement type selects the modulation scheme that the signal is modulated

with. The signal processing is different, depending on the selected modulation.
1. Press the "Meas" key to open the measurement menu.

2. Select the modulation of the signal you want to measure.

● "ASK": Demodulates 2ASK signals.

Amplitude-shift keying (ASK) is a digital modulation scheme that changes the
amplitude of the carrier to transmit different values (or symbols). Each value
corresponds to a different amplitude. In the most basic form (2ASK), there are
two (binary) values: 0 and 1. When a value of 1 occurs, the signal is transmit-
ted with a certain, fixed amplitude. On a value of 0, the signal is transmitted
with a reduced amplitude.
Often the amplitude of the "1" signal is 100

 

% and the amplitude of the "0" sig-

nal is close to 0

 

% of the nominal carrier amplitude (OOK = on-off-keying). The

R&S

 

FPC1000 detects the different amplitudes, demodulates the signal and

retrieves the original sequences of the digital symbols.
For proper demodulation, you have to match the 

center frequency

 to the ASK

carrier frequency.

● "FSK": Demodulates 2FSK signals.

Frequency-shift keying (FSK) is a digital modulation scheme that changes the
frequency of the carrier to transmit different values (or symbols). Each value
corresponds to a different frequency. In the most basic form (2FSK), there are
two (binary) values: 0 and 1. When a value of 0 occurs, the signal is transmit-
ted with a certain frequency f

1

. On a value of 1, the signal is transmitted with a

frequency f

2

.

For proper demodulation, you have to set a 

center frequency

 that is the arith-

metic mean of f

1

 and f

2

.

Make sure to apply a signal with the correct modulation scheme. If you apply a sig-
nal with a different modulation than the selected one, the results are not valid.

Measurements and Result Displays

北京海洋兴业科技股份有限公司（证券代码：839145）

www.hyxyyq.com

Summary of Contents for FPC1000

Page 1: ...FPC1000 Spectrum Analyzer User Manual User Manual 1178 4130 02 02 ÜYN2 北京海洋兴业科技股份有限公司 证券代码 839145 www hyxyyq com ...

Page 2: ...rmware version 1 10 and later 2017 Rohde Schwarz GmbH Co KG Mühldorfstr 15 81671 München Germany Phone 49 89 41 29 0 Fax 49 89 41 29 12 164 Email info rohde schwarz com Internet www rohde schwarz com Subject to change Data without tolerance limits is not binding is a registered trademark of Rohde Schwarz GmbH Co KG Trade names are trademarks of their owners Throughout this manual products from Roh...

Page 3: ... product is used for its designated purpose if it is used in accordance with its product documentation and within its performance limits see data sheet documentation the following safety instructions Using the product requires technical skills and in some cases a basic knowledge of English It is therefore essential that only skilled and specialized staff or thoroughly trained personnel with the re...

Page 4: ...words and their meaning The following signal words are used in the product documentation in order to warn the reader about risks and dangers Indicates a hazardous situation which if not avoided will result in death or serious injury Indicates a hazardous situation which if not avoided could result in death or serious injury Indicates a hazardous situation which if not avoided could result in minor...

Page 5: ...d either at all or to the extent necessary electric shock fire and or serious personal injury or death may occur 1 Prior to switching on the product always ensure that the nominal voltage setting on the product matches the nominal voltage of the mains supply network If a different voltage is to be set the power fuse of the product may have to be changed accordingly 2 In the case of products of saf...

Page 6: ...in such a way that anyone who has access to the product as well as the product itself is adequately protected from injury or damage 14 Use suitable overvoltage protection to ensure that no overvoltage such as that caused by a bolt of lightning can reach the product Otherwise the person operating the product will be exposed to the danger of an electric shock 15 Any object that is not designed to be...

Page 7: ...e clothing must be worn 7 Laser products are given warning labels that are standardized according to their laser class Lasers can cause biological harm due to the properties of their radiation and due to their extremely concentrated electromagnetic power If a laser product e g a CD DVD drive is integrated into a Rohde Schwarz product absolutely no other settings or functions may be used as describ...

Page 8: ...re ready to be used 4 Cells and batteries must not be exposed to any mechanical shocks that are stronger than permitted 5 If a cell develops a leak the fluid must not be allowed to come into contact with the skin or eyes If contact occurs wash the affected area with plenty of water and seek medical aid 6 Improperly replacing or charging cells or batteries that contain alkaline electrolytes e g lit...

Page 9: ...sal regulations must be observed 4 If handling the product releases hazardous substances or fuels that must be disposed of in a special way e g coolants or engine oils that must be replenished regularly the safety instructions of the manufacturer of the hazardous substances or fuels and the applicable regional waste disposal regulations must be observed Also observe the relevant safety instruction...

Page 10: ...s de seguridad elementales así como la documentación del producto y entréguelas a usuarios posteriores Tener en cuenta las informaciones de seguridad sirve para evitar en lo posible lesiones o daños por peligros de toda clase Por eso es imprescindible leer detalladamente y comprender por completo las siguientes informaciones de seguridad antes de usar el producto y respetarlas durante el uso del p...

Page 11: ...erte Indica una situación de peligro que si no se evita puede causar lesiones graves o incluso la muerte Indica una situación de peligro que si no se evita puede causar lesiones leves o moderadas Indica información que se considera importante pero no en relación con situaciones de peligro p ej avisos sobre posibles daños materiales En la documentación del producto se emplea de forma sinónima el té...

Page 12: ...o o en la hoja de datos En caso de sobrecalentamiento del producto pueden producirse choques eléctricos incendios y o lesiones graves con posible consecuencia de muerte Seguridad eléctrica Si no se siguen o se siguen de modo insuficiente las indicaciones del fabricante en cuanto a seguridad eléctrica pueden producirse choques eléctricos incendios y o lesiones graves con posible consecuencia de mue...

Page 13: ...EC61010 1 EN 61010 1 válidos en cada caso 11 A menos que esté permitido expresamente no retire nunca la tapa ni componentes de la carcasa mientras el producto esté en servicio Esto pone a descubierto los cables y componentes eléctricos y puede causar lesiones fuego o daños en el producto 12 Si un producto se instala en un lugar fijo se deberá primero conectar el conductor de protección fijo con el...

Page 14: ...a y o térmica o el desmontaje del producto debe tenerse en cuenta imprescindiblemente el capítulo Eliminación protección del medio ambiente punto 1 5 Ciertos productos como p ej las instalaciones de radiocomunicación RF pueden a causa de su función natural emitir una radiación electromagnética aumentada Deben tomarse todas las medidas necesarias para la protección de las mujeres embarazadas Tambié...

Page 15: ...cumuladores o celdas pueden producirse explosiones incendios y o lesiones graves con posible consecuencia de muerte El manejo de baterías y acumuladores con electrolitos alcalinos p ej celdas de litio debe seguir el estándar EN 62133 1 No deben desmontarse abrirse ni triturarse las celdas 2 Las celdas o baterías no deben someterse a calor ni fuego Debe evitarse el almacenamiento a la luz directa d...

Page 16: ...que debe ser recogido por separado La eliminación se debe efectuar exclusivamente a través de un punto de recogida apropiado o del servicio de atención al cliente de Rohde Schwarz 2 Los dispositivos eléctricos usados no se deben desechar con los residuos domésticos sin clasificar sino que deben ser recogidos por separado Rohde Schwarz GmbH Co KG ha elaborado un concepto de eliminación de residuos ...

Page 17: ... to be informed about new application notes related to your instrument please send an e mail to the Customer Support Center stating your instrument and your wish We will take care that you will get the right information Europe Africa Middle East Phone 49 89 4129 12345 customersupport rohde schwarz com North America Phone 1 888 TEST RSA 1 888 837 8772 customer support rsa rohde schwarz com Latin Am...

Page 18: ...18 4 1 Manual Operation 18 4 2 Screen Layout 21 4 3 Remote Operation 24 5 Preset 31 6 Instrument Setup 33 6 1 BNC Connector Usage 33 6 2 Network Configuration 33 6 3 Date and Time 35 6 4 Regional Settings 36 6 5 Display Settings 37 6 6 Audio Settings 38 7 Data Management 39 8 Measurement Wizard 45 9 The Spectrum Application 52 9 1 Configuration Overview 52 9 2 Measurements and Result Displays 54 9...

Page 19: ... 119 10 6 Trigger Configuration 120 10 7 Trace Configuration 120 10 8 Marker Configuration 120 11 Analog Demodulation 122 11 1 Measurements and Result Displays 122 11 2 Frequency Configuration 125 11 3 Amplitude Configuration 125 11 4 Bandwidth Configuration 126 11 5 Sweep Configuration 130 11 6 Limits 131 12 Digital Demodulation 133 12 1 Measurements and Result Displays 133 12 2 Measurement Confi...

Page 20: ...9 13 8 Data Management 170 13 9 Applications 179 13 10 Remote Commands of the Spectrum Application 179 13 11 Remote Commands of the Receiver Application 229 13 12 Remote Commands of the Analog Demodulation 236 13 13 Remote Commands of the Digital Demodulation 244 13 14 Status Reporting System 253 List of Commands 268 Index 274 北京海洋兴业科技股份有限公司 证券代码 839145 www hyxyyq com ...

Page 21: ...Contents FPC1000 6 User Manual 1178 4130 02 02 北京海洋兴业科技股份有限公司 证券代码 839145 www hyxyyq com ...

Page 22: ...ser manual provides the complete contents for immediate display on the internet The user manual is also integrated into the firmware chm format You can export the file to a memory stick Setup User Preferences Export Documentation After the export you can connect the memory stick to a PC and read the chm file Service manual Describes the performance test for checking the rated specifications module...

Page 23: ...e software See www rohde schwarz com firmware fpc1000 The open source acknowledgement is also integrated into the firmware chm format You can export the file to a memory stick Setup User Preferences Export Doc umentation After the export you can connect the memory stick to a PC and read the chm file Application notes application cards white papers etc These documents contain information about poss...

Page 24: ...e with the instrument In addition read and observe the safety instructions in the following sections Notice that the data sheet may specify additional operating conditions Risk of instrument damage Note that the general safety instructions also contain information on operating condi tions that prevent damage to the instrument The instrument s data sheet can contain additional operating conditions ...

Page 25: ...rloaded EMI impact on measurement results Electromagnetic interference EMI may affect the measurement results To suppress generated electromagnetic interference EMI Use suitable shielded cables of high quality For example use double shielded RF and LAN cables Always terminate open cable ends Note the EMC classification in the data sheet 2 1 Unpacking and Checking the Instrument Unpack the R S FPC1...

Page 26: ... mechanical effects dur ing transportation Packing material Retain the original packing material If the instrument needs to be transported or ship ped at a later date you can use the material to protect the control elements and con nectors 2 2 Placing or Mounting the Instrument The R S FPC1000 is designed for use under laboratory conditions either on a bench top or in a rack Benchtop operation If ...

Page 27: ...2 3 Connecting AC Power The AC power connector on the rear panel of the R S FPC1000 allows you to connect it to the primary power supply Included in the delivery of the R S FPC1000 are several common power plug types 1 Select the cable with the plug type you need and firmly connect it to the R S FPC1000 2 Connect the AC plug to the power outlet to supply the R S FPC1000 with power The R S FPC1000 ...

Page 28: ...ng and ready for oper ation Turning off the R S FPC1000 Turn off the main AC power switch on the rear panel of the R S FPC1000 position O The instrument is no longer supplied with AC power Changing the AC supply fuse Only fuses of the type 2A T IEC60127 2 V should be used 1 Disconnect the power cable 2 Open the flap covering the voltage selector using a small screwdriver or similar 3 Remove the cy...

Page 29: ...ad 5 RF input 4 Power switch Instrument damage caused by cleaning agents Cleaning agents contain substances that may damage the instrument For example cleaning agents that contain a solvent may damage the front panel labeling plastic parts or the display Never use cleaning agents such as solvents thinners acetone etc acids bases or other substances The outside of the instrument can be cleaned suff...

Page 30: ...1000 on and off on page 13 Headphone jack The female headphone jack allows you to connect headphones or external speakers with a miniature jack plug You can control the output voltage with the volume control integrated into the firmware Refer to the user manual for details If you connect headphones or external speakers the R S FPC1000 automatically turns off the internal speaker Risk of hearing da...

Page 31: ...on of the function keys 3 2 Rear Panel 1 4 3 2 Figure 3 2 Rear panel of the R S FPC1000 1 Trigger input external reference 2 LAN 3 Power supply 4 USB port type B Power supply The AC power supply and main power switch are located in a unit on the rear panel of the instrument The main power switch has the following states Position 1 The instrument is supplied with power Position 0 The instrument is ...

Page 32: ... reference Note that the reference signal must be stronger than 0 dBm LAN The LAN interface allows you to connect the R S FPC1000 to a local network for remote control printouts or data transfer The assignment of the RJ 45 connector sup ports twisted pair category 5 UTP STP cables in a star configuration UTP stands for unshielded twisted pair and STP for shielded twisted pair USB port type B The U...

Page 33: ...ncy characteristics of the measurement The contents of the menu depend on the measurement application that you are using For example the Frequency menu in the spectrum application looks different than the Frequency menu of the analog demodulation application Exceptions are the Preset key and the camera key These do not open a menu but initiate an action performing a preset and taking a screenshot ...

Page 34: ...r A softkey that opens a submenu shows an arrow in its label Example Pressing the Freq key opens the Frequency menu The second soft key in the list Center Freq Step Size opens a submenu Figure 4 4 Softkey with an arrow opens a submenu It initiates some kind of action Example Pressing the Span key and selecting the Full Span menu item restores the full frequency span It changes the state of somethi...

Page 35: ...the character you require is selected Example Press the Freq key and select the User Preference menu item In the dialog box select the Site Name menu item and enter some characters for Home for example press 6x 4 3x 6 1x 6 and 2x 9 Unit keys The unit keys confirm entries of values that have a unit The units assigned to each key are indicated on the key itself or next to the key Example Press the F...

Page 36: ...e it also scrolls through the dialog box Turning it to the right corresponds to a downward movement Moving it to the left to an upward movement The rotary knob increases or decreases any kind of numeric value if an input field is active Turning it to the right corresponds to an increase turning it to the left to a decrease of a numeric value The rotary knob changes numeric values with a fix step s...

Page 37: ...urrently using as well as the date and time Input field An input field opens when you select a feature that requires you to enter a value The header of the input field shows the name of the softkey menu you have currently selected If no input field is open the R S FPC1000 just shows the name of the soft key menu you have currently selected Softkey menu Softkeys provide access to measurement settin...

Page 38: ...e Min Min hold trace mode Avg Average trace mode View View trace mode No label Blank trace mode trace is off Table 4 2 Overview of detectors Abbreviation Detector AP Auto peak detector Pk Max peak detector Mi Min peak detector Rm RMS detector Sa Sample detector QP Quasipeak detector receiver only Marker information The marker information indicates the position of each active marker If a marker fun...

Page 39: ... allow you to operate the R S FPC1000 remotely from another computer for example PC or tablet To use the R S FPC1000 this way you have to establish a connection between both devices via the LAN Wi Fi or USB interfaces of the R S FPC1000 Remote desktop R S InstrumentView R S InstrumentView is a software that contains various useful tools including a remote desktop application You can download the s...

Page 40: ...AppStore iOS devices A search for Rohde Schwarz MobileView should find the app 1 Start the R S FPC1000 2 Configure your tablet or phone as a hotspot for an ad hoc connection usually in the phone settings 3 Connect the R S FPC1000 to the mobile device a Press the Setup key to open the instrument setup menu b Select WiFi On to turn on the Wi Fi functionality c Select the Connect menu item to start a...

Page 41: ... SCPI command to change the center frequency is SENSe FREQuency CENTer When you send a succession of these commands you can configure and perform complete measurements There are several tools that allow you to connect to an instrument send an individual or more command s and compile automated test sequences One of these tools is delivered with the R S VISA library that is available for download on...

Page 42: ...ueries information about the connected product In this case it should return a string similar to this Rohde Schwarz FPC1000 1328 6660K02 111111 1 00 Query button whenever you want to retrieve information from the instrument query use this button Tip See Chapter 13 1 Remote Control Basics on page 143 for a comprehen sive description about the remote command syntax and the ways you can send a comman...

Page 43: ...y CENTer command changes the center frequency of the R S FPC1000 After a preset the center frequency is half of the supported frequency range 500 MHz for 1 GHz instruments When you send the command the center frequency changes to 100 MHz You can observe this change on the instrument display 9 Send the command again this time as a query To query the state of a setting add a question mark instead of...

Page 44: ...ectrum around the center fre quency of 100 MHz a initiate continuous off This command selects single sweep mode recommended for remote measure ments b initiate immediate wai You can write two commands into one command line but have to separate them with a semicolon The first command INITiate IMMediate ini tiates the measurement The second command wai instructs the program to wait until the precedi...

Page 45: ...file spreadsheet etc for further evaluation There are also SCPI commands that auto matically copy that data into a file so you do not have to do that manually Tip Logging commands with the You can save all commands you have sent with RsVisaTester into a log file txt file type and reuse it later on To do so turn on the Write Log feature and select a folder to save the file in Change Log File menu i...

Page 46: ...eset key instead of the factory defaults 2 Press the Setup key to open the setup menu 3 Select the User Preference menu item to open the user preference dialog box 4 Select the Preset Mode menu item to select the preset mode Default Restores the factory default configuration User Restores custom default values taken from a dataset In that case you have to select a dataset that contains the default...

Page 47: ...trument Setup menu item to open the setup menu 3 Select the Reset To Factory Settings menu item The R S FPC1000 initiates the reset process and will ask you to confirm the reset When you select Yes the system will be reset 北京海洋兴业科技股份有限公司 证券代码 839145 www hyxyyq com ...

Page 48: ...the setup menu 2 Select the Instrument Setup menu item to open the instrument setup dialog box 3 Select the BNC menu item in the Hardware category 4 Select one of the menu items Trigger Input You can connect an external trigger source and trigger measurements Reference Input You can connect an external frequency reference and synchronize the fre quency of the R S FPC1000 with the external referenc...

Page 49: ... allocates the network prop erties IP address subnet mask and gateway 1 Press the Setup key to open the setup menu 2 Select the Instrument Setup menu item to open the instrument setup dialog box 3 Select the DHCP menu item in the LAN category 4 Select On to activate DHCP The R S FPC1000 automatically writes the network properties in the correspond ing fields IP Address Subnet Mask and Gateway This...

Page 50: ...is not required Using an open Wi Fi poses security risks however so be cautious when connecting to an open Wi Fi 6 Enter the password of the Wi Fi network 6 3 Date and Time Remote commands required to configure the date and time Chapter 13 5 System Configuration on page 164 The R S FPC1000 has an internal system clock A time stamp is added to various applications for example when you create a file...

Page 51: ...e zone before you define the system time 6 4 Regional Settings Remote commands required to configure regional settings Chapter 13 5 System Configuration on page 164 Selecting the user interface language The R S FPC1000 supports several user interface languages When you change the language all user interface elements that contain text are translated into the corre sponding language Note that the La...

Page 52: ... is a percentage from 0 to 100 with 100 being the brightest Adjusting the display color scheme The color schemes define the way colors are displayed on the screen When you change the color scheme you can adjust the viewing experience to the lighting condi tions surrounding you 1 Press the Setup key to open the setup menu 2 Select the Instrument Setup menu item to open the instrument setup dialog b...

Page 53: ...e system beeper The system beeper produces a sound for example if a message box turns up 1 Press the Setup key to open the setup menu 2 Select the Instrument Setup menu item to open the instrument setup dialog box 3 Select the System Beeper Volume menu item in the Audio category 4 Select the volume that you prefer The volume is a percentage from 0 to 100 with 100 being the loudest Turning audio ou...

Page 54: ...ysis tools that you usually apply to measurement and that have an effect on the measurement results A typical template that you might use regularly is a limit line or transducer factor The R S FPC1000 already provides several predefined templates If you need to create custom templates you have to use the R S InstrumentView software package Templates come in different forms and formats Each type of...

Page 55: ...ecall File Manager The free disk space is indica ted at the top of the dialog box Folder structure of the internal memory The internal memory has a given folder structure Basically each data type has its own designated folder For example there is a folder labeled Channel Tables that contains all channel tables that are delivered with the firmware Another folder is labeled Datasets that is the defa...

Page 56: ... labeled with a lock symbol in the Stat column of the file manager it is read only and therefore cannot be edited You can remove the read only attribute in several ways Connect the R S FPC1000 to a PC and start the R S InstrumentView software In the software start Instrument File Transfer select a file and lock or unlock the file with the Lock feature Copy the file to a computer and remove the att...

Page 57: ...ets that you save This meta infor mation is then included in measurement reports that you create with the R S Instru mentView software 1 Press the Setup key to open the setup menu 2 Select the User Preferences menu item 3 Select one of the items in the Site category Site Name Enter the location where the measurement takes place User Enter the name of person who does the measurement Comments Enter ...

Page 58: ...tem to open the file manager When you restore a dataset the R S FPC1000 automatically opens the Datasets folder 3 If you want to restore the dataset from a different folder or an external memory device navigate to the folder with the dataset 4 Confirm your selection with the Load menu item Previewing a dataset Before you restore a dataset you can preview the dataset This can be useful if you are n...

Page 59: ...to open the user preference menu 3 Select the Default Filename menu item to change the default filename Enter any filename you like with the alphanumeric keys for example Screenshot Every screenshot that you take from now on will have that name 4 Select the Filename Counter Starts At menu item to change the numbering of screenshots Enter any number you like with the alphanumeric keypad for example...

Page 60: ... the R S InstrumentView software package if you want to access and use the measurement wizard Before you can use the measurement wizard you have to define a measurement set with the R S InstrumentView software package and transfer it to the R S FPC1000 The R S InstrumentView software package is available for download on the R S FPC1000 website at http www rohde schwarz com product fpc1000 Creating...

Page 61: ...thorized access with a password Encryption category When you protect the measurement set with a password you can edit the contents of the measurement set only after you have entered the correct password In addition you can control who is using the measurement sets by limiting its access to a particular set of R S FPC1000 serial numbers only All other devices will not be able to process these wizar...

Page 62: ...quence you have defined with the R S FPC1000 1 Open the File Transfer dialog box in the R S InstrumentView software Instru ment File Transfer 2 Select the Wizard Sets folder on both the R S FPC1000 left pane and the PC right pane 3 Select the measurement set you would like to transfer 4 Transfer the file to the R S FPC1000 with the button Alternatively you can use a memory stick to access a measur...

Page 63: ... the measurement set as defined with the R S Instrument View software User Enter the name of the person that performs the measurement No of Steps to Perform Enter the number of measurements you want to perform The field allows you to reduce the number of individual measurements and per form only those measurements that are really necessary If you reduce the number of measurements the R S FPC1000 o...

Page 64: ...ent can be useful for example if the results do not match your expectations and you want to vali date the results Interrupt Interrupts the sequence of measurements Interrupting a measurement can become necessary if the measurement does not yield the expected results for example violated limit lines In that case you can interrupt the measurement sequence and try to find the origin of the problem by...

Page 65: ...e manager For more information see Using in the file manager on page 40 The results for a measurement set consist of several files each file corresponding to one of the measurements For easy evaluation the R S FPC1000 includes the name of the measurement as defined in the wizard dialog or R S InstrumentView in the file name All result files that belong to a measurement set are stored in the same d...

Page 66: ...ator With the report editor you can create measurement reports for the full measure ment set or a selection of dataset only You can also perform simple tasks like acti vating or deactivating markers that have been set during the measurement 6 Add the results you want to include in the report by setting a checkmark or remov ing the checkmark in the report pane 7 Select the report format you would l...

Page 67: ...sult Displays 54 Frequency Configuration 72 Amplitude Configuration 77 Bandwidth Configuration 85 Sweep Configuration 88 Trigger Configuration 90 Trace Configuration 91 Marker Configuration 97 Marker Functions 103 Display Lines 106 Limit Lines 107 9 1 Configuration Overview The configuration overview provides quick access to the most important measurement settings in a single dialog box The conten...

Page 68: ...rsor keys or the rotary knob When you confirm your selection with the key you can change that setting 6 You can exit the configuration overview any time with the Exit menu item The configuration overview contains several panes each of which contains settings that thematically belong together Input For more information about the contents of the Input pane see Chapter 9 4 Amplitude Configuration on ...

Page 69: ...unctions like ACLR or OBW measurements These measurements provide settings and tools for special measurement tasks Measuring basic spectrum characteristics Basic spectrum measurements require no optional equipment on the R S FPC1000 1 Connect a DUT to the RF input of the R S FPC1000 2 Turn on the R S FPC1000 The R S FPC1000 measures the characteristics of the DUT in the frequency domain with the d...

Page 70: ...ro span mode You can use time domain measurements for example to monitor the characteristics of a signal and its behavior over time Figure 9 3 Display of a signal in the time domain The horizontal axis shows the time the vertical axis shows the signal levels You have to select the zero span mode deliberately to measure signal characteristics in the time domain Advanced measurement functions In add...

Page 71: ...nel power measurement 1 Press the Meas key to open the measurement menu 2 Select the Measurement Mode menu item to select the measurement 3 Select the Channel Power menu item The R S FPC1000 starts to measure the channel power Two vertical lines indicate the channel bandwidth The channel power measurement shows the results and various other information about the measurement in the diagram header P...

Page 72: ...pen the measurement menu 2 Select the Chan Bandwidth menu item The R S FPC1000 opens an input field to define the channel bandwidth 3 Enter the channel bandwidth you need Note The minimum channel bandwidth that you can set is 833 Hz at a span of 1 kHz Measuring the maximum channel power If signal levels fluctuate significantly you can measure the maximum channel power with the max hold function 1 ...

Page 73: ... as a standard file When you load such a standard file the R S FPC1000 automatically configures the measurement regard ing channel and general measurement settings Standard files for common telecommunications standards are already provided with the R S FPC1000 firmware If you want to measure a different standard you can also create custom standard defi nition files with the R S InstrumentView soft...

Page 74: ...idth of 1 MHz and the peak detector After finishing the automatic measurement the R S FPC1000 sets the optimal reference level Changing the span Usually the span that the R S FPC1000 selects yields optimal results But sometimes you also need to see the spectrum outside the current span to detect other signal com ponents that you need to include in the measurement Therefore you can adjust the span ...

Page 75: ...ertical lines show the occupied bandwidth The occupied bandwidth measurement shows the results and various other information about the measurement in the diagram header Occupied bandwidth Shows the occupied bandwidth in Hz Standard Shows the selected standard when you have selected one power BW Shows the power percentage of the occupied bandwidth Channel BW Shows the channel bandwidth The diagram ...

Page 76: ...easurement requires a different power per centage you can change that value 1 Press the Meas key to open the measurement menu 2 Select the Power Bandwidth menu item The R S FPC1000 opens an input field to define the power percentage 3 Enter the power percentage the measurement requires The R S FPC1000 now displays the occupied bandwidth graphically in the trace window and numerically above the tra...

Page 77: ... parameter the R S FPC1000 shows a blue dot in front of the standard display Defining the reference level The reference level is the power level that the R S FPC1000 expects at the RF input When you select the reference level make sure that you do not overload the R S FPC1000 by applying a signal whose power exceeds the maximum reference level As the power is measured with a small resolution bandw...

Page 78: ...Remote commands to control the spectrogram not supported Available with the optional Advanced Measurements application The spectrogram result display shows the spectral density of a signal in the frequency domain and over time simultaneously Like other result displays the x axis represents the frequency span The y axis repre sents time Time in the spectrogram runs chronologically from top to botto...

Page 79: ...e the R S FPC1000 starts to record spectro gram data when you enter the spectrogram mode You can see that the spectrogram result display fills up as each sweep adds an additional line to the spectrogram When you are in single sweep mode the R S FPC1000 does not add a line to the spectrogram until you initiate the next single sweep Controlling the spectrogram update In continuous sweep mode you can...

Page 80: ...m area of the screen for the spectro gram The number of lines in the spectrogram and therefore the displayed time period more than doubles Note It can however be necessary that the spectrum result display is still visible to evaluate measurement results For this purpose the spectrogram has an invisi ble scrollbar that you can use to scroll up and down the spectrogram to the frame that you would li...

Page 81: ...h The R S FPC1000 adjusts the screen colors according to your selection The following color schemes are available Default Green Yellow Green Blue Black White Red Purple Blue Black Adjusting the color distribution It is possible that the color distribution is not ideal in the default configuration The R S FPC1000 provides several settings to further enhance the color display in the spectrogram The ...

Page 82: ... the Meas key to open the measurement menu 2 Select the Level Range menu item to open the level range menu 3 Select the Reference Level menu item The R S FPC1000 opens an input field to enter the spectrogram reference level The reference level should be near the maximum level that has been measured while the spectrogram was running In the example the reference level should be at about 80 dBm 4 Ent...

Page 83: ... the same 100 dB 5 Select the Level Range menu item The R S FPC1000 opens an input field to enter the spectrogram level range In the example the level range of the signal is from about 80 dBm to about 120 dBm 6 Therefore set the level range to 40 dB to cover the complete level range of the sig nal As the level range is now adjusted the R S FPC1000 is able to map its complete color range to the lev...

Page 84: ... even 25 dB This provides a high contrast between signal parts that are above the noise floor and the noise floor which is drawn in black To show details of the noise floor and exclude the peak levels you have to lower the spectrogram reference level until it is just above the noise floor The R S FPC1000 then displays the signal parts that are above the reference level in only one color which is t...

Page 85: ...all menu item The R S FPC1000 opens the file manager 3 Select the file you need The file extension for spectrogram data is spm The R S FPC1000 loads the spectrogram and shows the data in the display Basically you can do the same things in spectrogram playback mode as in the spectrogram recording mode for example customize the display to your needs In addition to that functionality it is possible t...

Page 86: ...tamp of the time line The time stamp of the first time line T1 is always referred to the top most frame A time stamp of 00 00 50 000 for example means that the data was measured 50 seconds prior to the topmost frame In addition to the time line horizontal marker you can also use vertical markers in the spectrogram With the help of the marker and the time line you are able to find the exact moment ...

Page 87: ...pectrum analyzer is to measure the frequency and the power level of a signal and show these signal characteristics in a diagram The x axis of the diagram usually contains the frequency information of the signal while the y axis usually contains the level information Regarding the frequency information a typical measurement task does not require you to measure the characteristics of the complete fr...

Page 88: ...rt and stop frequen cies Defining a center frequency 1 Press the Freq key to open the frequency menu 2 Select the Center Freq menu item The R S FPC1000 opens an input field to define the center frequency Tip When you press the Freq key the R S FPC1000 automatically opens an input field to define the center frequency If the input field is inactive you can open it with the Center Freq menu item 3 En...

Page 89: ...0 sets the step size internally Manually defining the step size opens an input field to define the step size Defining a frequency offset A frequency offset allows you to shift the displayed frequency values by a certain amount to a higher or lower frequency This shift is an arithmetical operation only the measured frequency really remains the same Shifting the frequency to another value can be use...

Page 90: ...n key the R S FPC1000 automatically opens an input field to define the span If the input field is inactive you can open it with the Manual Span menu item 3 Enter a span The R S FPC1000 adjusts the span of the horizontal axis to the value you have entered Tip If you define a span of 0 Hz zero span the R S FPC1000 measures in the time domain In that state the R S FPC1000 measures the signal at the c...

Page 91: ...equency The label of the horizontal axis changes from Center and Span to Start and Stop 9 3 3 Channel Tables Working with channel tables Almost all transmission systems divide their assigned frequency ranges into channels Each channel corresponds to a specific frequency To keep the handling of such sys tems simple you can use channel tables instead of entering frequencies manually The R S FPC1000 ...

Page 92: ...000 changes the frequency according to the channel table and the channel you have selected Channel numbers are assigned to frequencies as follows The first channel is assigned a channel number and a frequency All subsequent channels have ascending numbers The frequency spacing between channels is fixed It can also be negative In that case the center frequency of the R S FPC1000 decreases with asce...

Page 93: ...ng If necessary the analyzer also attenuates or amplifies the signal to yield the best possi ble dynamic range When you define a low reference level meaning that a weak signal is expected the analyzer amplifies the signal internally to display even weak signals clearly On the other hand when you apply a strong signal or an unknown signal you have to make sure to define a reference level high enoug...

Page 94: ...adjust the hardware to the expected signal ignores the reference offset Thus it is important to keep in mind the actual power level that the R S FPC1000 must handle Do not rely on the displayed reference level internal reference level displayed reference level offset 1 Press the Ampt key to open the amplitude menu 2 Select the Range Ref Position menu item to open the display range menu 3 Select th...

Page 95: ...ation makes sure that the measurement results are reliable Signals that are stronger than allowed might distort the results High attenuation increases inherent noise i e the noise floor and thus decreases measurement sensitivity if you increase attenuation by 10 dB the sensitivity is reduced by 10 dB in other words the displayed noise increases by 10 dB High attenuation helps to avoid intermodulat...

Page 96: ...00 This mode gives a better impression of spurious products and is thus useful to analyze signals whose level is near the noise level However the signal to noise ratio in general can deteriorate See Table 9 1 for the dependencies between reference level and applied attenuation The current attenuation is indicated in the measurement settings Table 9 1 Dependencies of the selected reference levels a...

Page 97: ...ure with the maxi mum dynamic range you should turn off the preamplifier The gain of the preamplifier is automatically considered in the level display Turning the preamplifier on and off 1 Press the Ampt key to open the amplitude menu 2 Select the Preamplifier menu item The R S FPC1000 turns the preamplifier on and off The status of the preamplifier is indicated in the status bar 9 4 3 Scale of th...

Page 98: ... 4 4 Transducers The results of measurements with transducers or antennas usually need to be correc ted by their frequency characteristics These correction values are defined in trans ducer factors When you use a transducer factor these correction values can be directly considered in the measurement results A transducer factor consists of several data points with each data point being defined by a...

Page 99: ... submenu where you can select the transducer factor you need 4 Select the transducer factor you need and confirm the selection with the Load menu item The R S FPC1000 applies the correction values to the measurement results An example would be the transducer factor of the R S HL223 antenna that is defined between 200 MHz and 1300 MHz The R S FPC1000 therefore displays the noise in this frequency r...

Page 100: ...am the R S FPC1000 adjusts the reference level accordingly The reference level is shifted by the maximum transducer value in the positive or nega tive direction Frequency range of transducer If the set frequency range is wider than the span in which a transducer is defined the R S FPC1000 assumes the transducer values outside the defined range to be zero Data sets containing transducer factors The...

Page 101: ...dth by a factor of 10 increases the displayed noise by a factor of 10 10 dB Measurement speed The resolution bandwidth affects the speed of the measurement If you want to dis play the true spectrum the resolution filters have to settle at all frequencies that are of interest Narrow filters have a longer settling time compared to wide ones Therefore the sweep time increases the smaller the resoluti...

Page 102: ...ues Video voltage is the DC voltage that results from the IF signal passing through the envelope detector which removes the IF components and outputs the envelope only This output is also known as the video signal The figure below shows that process on an AM modulated signal in the time domain In case of an AM modulated signal the envelope or video signal contains a DC com ponent that corresponds ...

Page 103: ...e of the available bandwidths If you enter a bandwidth that the R S FPC1000 does not support the R S FPC1000 rounds to the next available bandwidth Refer to the data sheet for more information on available resolution bandwidths A manually selected VBW is indicated by a blue dot in front of the VBW label in the status bar Figure 9 11 Indicator of manual video bandwidth VBW Auto Automatically select...

Page 104: ...nd ends at the measure ment time that you have selected Defining the sweep time 1 Press the Sweep key to open the sweep menu 2 Select one of the Sweeptime x menu items Sweeptime Manual Opens an input field to define the measurement time A manually selected measurement time is indicated by a blue dot in front of the SWT label in the status bar Figure 9 12 Indicator of a manual sweep time Sweeptime ...

Page 105: ...signal In such cases you can use a trigger A trigger responds to certain events When you use a trigger the analyzer starts a measure ment only when certain trigger conditions are met Selecting the trigger source The trigger source selects the type of event whose condition must be met to start data acquisition 1 Press the Sweep key to open the sweep menu 2 Select the Trigger menu item to open the t...

Page 106: ...onfigured as a trigger input in the instrument setup Defining a trigger delay When you are using an external trigger you can delay the start of the measurement with respect to the trigger event Thus you can include time differences between the trigger event and the measurement 1 Press the Sweep key to open the sweep menu 2 Select the Trigger menu item to open the trigger menu 3 Select the Trigger ...

Page 107: ... two traces Both traces are based on the same set tings except the trace settings like the trace mode or the detector You can use the second trace to compare for example two different detector settings In the default state only trace 1 is active 1 Press the Trace key to open the trace menu 2 Select the Trace x menu item The R S FPC1000 activates the second trace which has a different color than th...

Page 108: ...everal sweeps Selecting the Max Hold trace mode automatically selects the Max Peak detec tor To overwrite a max hold trace change a parameter in a way that the results cannot be compared any more for example the span The Max Hold trace mode is a good way to detect intermittent signals or the max imum values of fluctuating signals for example Min Hold Displays the lowest levels that have been measu...

Page 109: ... want to work with If you have selected the average trace mode Average menu item the R S FPC1000 opens an input field to define the number of measurements inclu ded in the averaging Average Count 4 Enter the number of sweeps to include in the averaging In continuous sweep mode the R S FPC1000 now calculates the moving average over the number of sweeps you have specified In single sweep mode it sto...

Page 110: ...a high sweep time However the bandwidth occupied by the signal to be measured should at least equal the frequency covered by a trace pixel or the selected resolution bandwidth whichever is larger Otherwise the power the R S FPC1000 shows is too low because there are spectral components within the frequency range covered by the pixel that do not originate from the signal you want to observe e g noi...

Page 111: ...S FPC1000 also stores the associated trace in the trace memory If you restore it later you can display the memory trace as if it is a nor mal trace 1 Press the Trace key to open the trace menu 2 Select the trace you want to store in the trace memory with the Select Trace menu item The R S FPC1000 saves the selected trace 3 Select the Trace Memory menu item The R S FPC1000 stores the trace data in ...

Page 112: ... remains as it is the result is written to the active trace Tip To turn off trace mathematics select the Off menu item If trace mathematics is active the resulting trace can be adjusted in its position by selecting the Math Position menu item Figure 9 15 Result of trace mathematics Trace Memory 9 9 Marker Configuration Access marker menu Mkr Access marker positioning menu Mkr Remote commands to co...

Page 113: ... 9 16 Indicator of vertical marker position The marker coordinates are also shown in numerical form in the marker list above the diagram area The marker list opens when you activate the first marker Figure 9 17 Marker information in the diagram area and the marker list above the diagram The marker list contains the following information Marker number and type M for normal markers D for delta marke...

Page 114: ...an change the marker position in several ways Move the marker with the cursor keys Use the Up and Down cursor keys to move the marker to the left or right of its current position The step size the distance the marker moves is 10 of the span Move the marker with the rotary knob Use the rotary knob to move the marker to the left or right of its current posi tion The step size the distance the marker...

Page 115: ... cannot be converted to a delta marker 1 Activate a marker and a delta marker 2 Select the delta marker if it is not already selected 3 Select the Marker Type menu item The delta marker turns into a normal marker Its label changes accordingly from D x to M x and its coordinates are now absolute values Removing markers or delta markers Markers or delta markers can be removed at any time you want Th...

Page 116: ...ve to its current position Set To Minimum Positions the active marker or delta marker on the lowest value of the trace All Marker to Peak Places all existing markers or delta markers on the highest level values of the trace This is done hierarchical whereas marker 1 is placed on the highest level marker 2 is placed on the second highest level and so on Center Marker Freq Matches the center frequen...

Page 117: ...l line at the position you selected and labels it with 1 for search range 1 Figure 9 18 Marker search range lines 8 To use search range 1 for measurements select the Set to Search Range 1 menu item The R S FPC1000 then uses the search range for the Set To Peak Set To Next Peak Set To Minimum and All Marker To Peak functions and positions the markers or delta markers inside this range Note You can ...

Page 118: ... values the resolution bandwidth the detector and the level display mode absolute or relative To stabilize the noise power display the R S FPC1000 uses the pixel the marker is on and four pixels to the right and four pixels to the left of the marker pixel Noise power density can provide useful information when you are measuring noise or digitally modulated signals However you will get valid result...

Page 119: ...r has a resolution of 0 1 Hz and therefore pro vides far more accurate results Despite the accuracy the measurement is still fast because of a special algorithm for the I Q baseband signal The frequency counter only gives accurate results for sine signals that are at least 20 dB above the noise floor If the S N ratio is less noise affects the results Measuring the frequency 1 Press the Mkr key to ...

Page 120: ... It demodulates the signal at the marker frequency You can listen to the demodulated signal with the internal speaker or headphones that you can connect to the 3 5 mm headphone jack on the front of the R S FPC1000 When demodulating an AM modulated signal the R S FPC1000 turns the video volt age into an audible sound You should therefore set the reference level to about the level of the signal that...

Page 121: ...3 Select the Volume x menu item The R S FPC1000 opens an input field to define the demodulation volume 4 Enter the volume you are comfortable with Note The demodulation volume is a percentage 0 to 100 with 100 being full volume For more information on general volume control see Chapter 6 6 Audio Settings on page 38 9 11 Display Lines Access Lines Remote commands to configure display lines Chapter ...

Page 122: ...entering a level value into the input field Alternatively you can also move the display line with the rotary knob or the cursor keys Figure 9 19 Display line at 38 dBm 9 12 Limit Lines Access limit lines menu Lines Limit lines are an analysis tool that allows you to compare the measured signal levels to signal specifications and determine if the signal levels comply to the specifications Remote co...

Page 123: ... with the R S InstrumentView software package and then transfer them into the internal memory of the R S FPC1000 The number of limit lines you can store in the memory depends on other datasets available on theR S FPC1000 or if you are using an external storage device for example memory stick the size of it Selecting a limit line Before selecting a limit line you need to decide if you want to use i...

Page 124: ... line threshold 5 Enter the required threshold The R S FPC1000 displays the threshold line The threshold line is represented by a straight red line Hiding a limit line Hiding a limit line allows you to switch quickly between showing and hiding a limit line and evaluate a limit check without turning it off it completely When you hide a limit line a limit check is no longer performed but the limit l...

Page 125: ... area A limit check relates only to the frequency range defined by the limit line not the span Limit violation Note that a limit check fails only if the signal exceeds the limit line If the signal level is the same as the limit value the limit check passes You can also turn on an audio signal that sounds an alarm if a limit check fails 1 Press the Lines key top open the lines menu 2 Select the Aud...

Page 126: ...u item Measurements and Result Displays 111 Frequency Configuration 114 Amplitude Configuration 117 Bandwidth Configuration 118 Sweep Configuration 119 Trigger Configuration 120 Trace Configuration 120 Marker Configuration 120 10 1 Measurements and Result Displays Access Meas Remote commands required to configure measurements Chapter 13 11 1 Measurement Configuration on page 229 In receiver mode t...

Page 127: ... and display range In addition to the current signal level the bargraph also shows the highest signal level that has been measured since the measurement has begun Max Hold information It remains effective even if you change any receiver settings for example the frequency or the attenuation and is only reset when you deliberately do so The max hold information is represented by a dark blue vertical...

Page 128: ... display emphasizes the fact that the scan measures single receiver frequencies only and not the frequencies between those receiver frequencies Yellow lines represent the current signal level Blue lines represent the highest level that has been measured since the measurement was started Max Hold information Figure 10 2 Fixed frequency scan in the range from 30 MHz to 150 MHz with a stepsize of 10 ...

Page 129: ...x hold information is indicated by a blue line that is appended to the yellow line which indicate the current signal level The max hold information is displayed for both frequency modes frequency display and channel display Resetting the max hold To begin a new max hold measurement you have to reset the max hold information deliberately 1 Press the Meas key to open the measurement menu 2 Select th...

Page 130: ... frequencies with the rotary knob define a frequency step size 1 Press the Freq key to open the frequency menu 2 Select the Frequency Step menu item to open the frequency step menu 3 Select one of step size options 0 1 x RBW The step size equals 10 of the resolution bandwidth Center The step size equals the center frequency Manual x Hz Define any step size you want in the input field that opens wh...

Page 131: ... item The R S FPC1000 opens an input field to define the start frequency of the scan range 3 Enter the frequency you want the scan to start at 4 Select the Stop Frequency The R S FPC1000 opens an input field to define the stop frequency of the scan range 5 Enter the frequency you want the scan to stop at 6 Select the Scan Step menu item The R S FPC1000 opens an input field to define the frequency ...

Page 132: ...of the reference level on page 79 Range Ref Position Reference Offset Defining a reference offset on page 79 Unit Selecting the display unit on page 82 Preamplifier Preamplifier on page 82 Attenuator RF attenuator on page 80 Impedance Selecting the input impedance on page 77 Transducer Chapter 9 4 4 Transducers on page 83 Defining the bargraph scale The scale of the bargraph depends on the referen...

Page 133: ...djusts the range of the bargraph based on the currently applied sig nal strength 10 4 Bandwidth Configuration Access BW Access Setup Config Overview Bandwidth selected settings Remote commands to configure the bandwidth Chapter 13 11 4 Bandwidth on page 232 The receiver application adds 6 dB resolution bandwidths to the 3 dB resolution band widths already available in other applications The 6 dB b...

Page 134: ...ss the Sweep key to open the sweep menu 2 Select the Measurement Time menu item 3 Define the measurement time you need Selecting the measurement mode When you enter the receiver mode the R S FPC1000 repeatedly measures the receive frequency or set of frequencies over the measurement time you have defined If you want to measure a fixed frequency or frequency scan only once select single scan mode 1...

Page 135: ...sewhere Trace Mode Chapter 9 8 1 Trace Mode on page 93 Note that the Blank and View trace modes are not available in the receiver Detector Chapter 9 8 2 Detector on page 94 The receiver application only supports the Max Peak Average and RMS detector In addition the receiver application also has the Quasi Peak detector The quasi peak detector displays the maximum value weighted to CISPR 16 1 1 that...

Page 136: ...rker and position it on one of the measurement frequencies 5 Select the Marker To Fixed Freq menu item The R S FPC1000 changes the receiver frequency to the marker frequency At the same time the R S FPC1000 turns on the fixed frequency measurement and measures the level of the new receiver frequency Selecting the marker display mode For frequency scans based on a channel table you can select wheth...

Page 137: ...lected settings Remote commands required to control measurements and result displays Chapter 13 12 1 Measurements and Result Displays on page 236 The analog demodulation measurement application provides several measurements and numerical and graphical result displays These result displays show various aspects and characteristics of the demodulated signal Selecting the measurement The measurement t...

Page 138: ...re 11 1 Trace display of an AM signal The x axis shows the demodulation characteristics of the signal over time The y axis shows the modulation depth in AM signals or the frequency devia tion in Hz FM signals The carrier frequency center frequency of the signal is indicated in the diagram footer The diagram header contains the most important signal characteristics in numerical form These numerical...

Page 139: ...r signal is modulated with Modulation Depth AM domain Shows the difference in amplitude the carrier signal is modulated with Peak Peak Shows the minimum and maximum frequency deviation FM signals or modulation depth AM signals Peak 2 Shows the average frequency deviation FM signals or modulation depth AM sig nals Peak Peak 2 RMS Shows the root mean square of the frequency deviation FM signals or m...

Page 140: ...he carrier signal you have to find it out You can do that for example by searching the frequency spectrum in the spectrum application in the area where you assume that the carrier is located Frequency settings in the analog modulation application described elsewhere Center Frequency Defining a center frequency on page 73 Frequency Step Size Defining a frequency step size on page 73 11 3 Amplitude ...

Page 141: ... signal deviates from the unmodulated sig nal 0 Hz The unit is Hz For FM signals you can define the display range of the y axis manually and automati cally The display range is defined by the deviation from the zero line per grid division 1 Press the Ampt key to open the amplitude menu Manual scaling of the y axis 2 Select the Deviation Per Division menu item 3 Enter a value between 1 kHz and 1 MH...

Page 142: ... 1 to Table 11 6 contain information about the different audio frequency ranges as a function of the demodulation bandwidth and the audio filter In most cases the audio filter with a DBW 1 characteristic is sufficient If you need to measure low modulation frequencies that are below the DBW 1 range consider to select another audio filter that fits your requirements When you are using the DBW 10 DBW...

Page 143: ...kHz demodulation bandwidths 1 Press the BW key to open the bandwidth menu 2 Select the FM Broadcast menu item 3 Select the time constant you need Off Applies no deemphasis filter 50 µs 50 µs time constant used for example in European FM broadcast ing 75 µs 75 µs time constant used for example in North American FM broad casting Table 11 1 Measurement times for the demodulation bandwidths Demodulati...

Page 144: ...0000 30 5000 Table 11 4 Minimum and maximum modulating frequencies for audio lowpass DBW 10 Demodulation bandwidth Modulating frequency Hz Minimum Maximum 2000000 610 100000 989000 305 50000 650000 230 32500 500000 150 25000 300000 95 15000 200000 60 10000 100000 30 5000 50000 15 2500 30000 10 1500 20000 6 1000 10000 3 500 Table 11 5 Minimum and maximum modulating frequencies for audio lowpass DBW...

Page 145: ...frequency Hz Minimum Maximum 2000000 60 10000 989000 30 5000 650000 25 3250 500000 15 2500 300000 10 1500 200000 6 1000 100000 3 500 50000 3 250 30000 3 150 20000 3 100 10000 3 50 11 5 Sweep Configuration Access Sweep Remote commands to control the measurement Chapter 13 12 5 Sweep Control on page 243 The sweep menu provides settings to control the measurement and the way data is captured Selectin...

Page 146: ...etermine if the measured signal characteristics comply to these specifications You can define limits for all numerical results available in the AM and FM result summary Note that you can define limits only for the numerical results The graphical results of the analog demodulation do not support limits or limit lines To use limits you have to create a set of limit values with the AM Limits and FM L...

Page 147: ...the limits or not Results within the limits are indicated by a Pass mes sage in a green font results that violate the limits are indicated by a Fail message in a red font Removing limits 1 Press the Lines key top open the limits menu 2 Select the Clear Limits menu item The R S FPC1000 removes the limit values from the result summary and no lon ger evaluates them Turning an audio signal in case of ...

Page 148: ...nts and Result Displays Access Meas Access Setup Config Overview Analysis selected settings Remote commands required to control measurements and result displays Chapter 13 13 1 Measurements and Result Displays on page 245 The goal of digital demodulation is to determine the quality of the signal that is trans mitted by the device under test DUT by comparing it against an ideal signal The DUT is us...

Page 149: ... amplitude On a value of 0 the signal is transmitted with a reduced amplitude Often the amplitude of the 1 signal is 100 and the amplitude of the 0 sig nal is close to 0 of the nominal carrier amplitude OOK on off keying The R S FPC1000 detects the different amplitudes demodulates the signal and retrieves the original sequences of the digital symbols For proper demodulation you have to match the c...

Page 150: ...s different 1 Press the Meas key to open the measurement menu 2 Select the modulation scheme of the signal you want to demodulate ASK or FSK 3 Select the result display Eye Diagram Shows the modulation accuracy in that it analyzes the transi tions from one modulation state to the other An open eye indicates little distortion in the signal transmission A closed eye indicates poor signal quality wit...

Page 151: ...37 for more information Figure 12 4 Modulation depth of a 2ASK signal Modulation Deviation FSK Shows the frequency shift of the signal The fre quency shift or frequency deviation is the frequency difference between the mark binary 1 and space binary 0 frequencies representing the binary digits Figure 12 5 Modulation deviation of a 2FSK signal Measurements and Result Displays 北京海洋兴业科技股份有限公司 证券代码 83...

Page 152: ...signal Magnitude Error FSK Shows the difference between the measured magnitude and the magnitude of the reference signal Modulation Index ASK Shows the modulation index of the measured signal Modulation Depth ASK Shows the modulation depth of the measured signal Modulation Error Shows the modulation deviation between measured signal and reference signal Carrier Power Shows the power of the measure...

Page 153: ...ion Access Meas Demod Parameters Access Setup Config Overview Bandwidth selected settings Remote commands required to define demodulation parameters Chapter 13 13 2 Measurement Configuration on page 250 A digital modulation system needs a transmit filter to limit the bandwidth of the trans mitted signal The receiver needs to know the characteristics of that filter to be able to demodulate the sign...

Page 154: ... be the same as that used by the transmitter for example if the transmitter uses a Gaussian filter you should analyze the signal with a Gaussian filter too Otherwise measurement results will not be valid The R S FPC1000 provides the following filter types Root Raised Cosine RRC Raised Cosine Gaussian Unfiltered You can define the roll off factor for all filters Defining the roll off factor of the ...

Page 155: ...u 2 Select the Number of Symbols menu item 3 Increase or decrease the symbols you want to capture as necessary 12 3 Frequency Configuration Access Freq Access Setup Config Overview Frequency selected settings Remote commands to configure the frequency Chapter 13 13 3 Frequency on page 251 The R S FPC1000 can demodulate a signal only if the frequency of the carrier signal is known Therefore you hav...

Page 156: ...sponds to the top of the grid 100 by default You can change the reference to another percentage for example to see the signal in more detail 1 Press the Ampt key to open the amplitude menu 2 Select the Ref Position menu item The R S FPC1000 opens an input field to define the reference position 3 Enter the percentage that should be displayed at the top of the diagram The R S FPC1000 adjusts the y a...

Page 157: ...deliberately The measurement results are updated accordingly In single mode the R S FPC1000 demodulates the signal once and then stops with out updating the results any longer Another measurement starts only when you delib erately initiate it 1 Press the Sweep key to open the sweep menu 2 Select the Continuous Sweep menu item The R S FPC1000 demodulates the signal continuously You can interrupt a ...

Page 158: ...tion The R S FPC1000 supports two different interfaces for remote control LAN Interface The protocol is based on TCP IP and supports the VXI 11 standard USB Interface The connectors for both interfaces are on the rear panel of the R S FPC1000and allow for a connection to a controller for remote control via a local area network LAN or directly via USB SCPI SCPI Standard Commands for Programmable In...

Page 159: ...s Therefore control programs should always define an initial device status for example with RST before implementing the required settings 13 1 1 1 LAN Interface To be integrated in a LAN the instrument is equipped with a standard LAN interface consisting of a connector a network interface and protocols VXI 11 Instrument access via VXI 11 is usually achieved from high level programming plat forms b...

Page 160: ...the controller and the instrument are exchanged via open network computing ONC remote procedure calls RPC With XDR VXI 11 legal RPC messages are known as VXI 11 standard Based on this standard messages are exchanged between the controller and the instrument The messages are identical with SCPI commands They can be organized in four groups Program messages control command to the instrument Response...

Page 161: ...ontrollers 13 1 2 Remote Control Connection The short and simple operating sequence below shows how to put the instrument into operation and quickly set its basic functions You can find out the current IP address for LAN operation in the setup menu Setup Instrument Setup In case of USB connection the IP address is always 172 16 10 10 1 Connect the R S FPC1000 to the LAN or directly to the controll...

Page 162: ...work independently and simultaneously They communicate with each other with so called messages Input unit with input buffer Command recognition Instrument hardware Output unit with output buffer Instrument settings database Status reporting system USB interface Ethernet USB interface Ethernet Figure 13 4 Instrument model in case of remote control 13 1 3 1 Input Unit The input unit receives command...

Page 163: ... STATus OPERation register The hardware executes the set tings and resets the bit again as soon as the new state has settled This fact can be used to synchronize command servicing Queries induce the data set management to send the desired data to the output unit 13 1 3 3 Output Unit The output unit collects the information requested by the controller which it receives from the data base management...

Page 164: ...ion DISPlay WINDow 1 4 MAXimize Boolean FORMat READings DATA type length HCOPy DEVice COLor Boolean HCOPy DEVice CMAP COLor RGB red green blue HCOPy IMMediate HCOPy ITEM ALL HCOPy ITEM LABel string HCOPy PAGE DIMensions QUADrant N HCOPy PAGE ORIentation LANDscape PORTrait HCOPy PAGE SCALe numeric value MMEMory COPY file_source file_destination SENSE BANDwidth BWIDth RESolution numeric_value SENSe ...

Page 165: ... numbering in remote control For remote control the suffix may differ from the number of the corresponding selec tion used in manual operation SCPI prescribes that suffix counting starts with 1 Suffix 1 is the default state and used when no specific suffix is specified Some standards define a fixed numbering starting with 0 If the numbering differs in manual operation and remote control it is indi...

Page 166: ...uired for each command and the allowed range of values are specified in the command description Allowed parameters are Numeric Values 151 Special Numeric Values 152 Boolean Parameters 152 Text Parameters 153 Character Strings 153 Block Data 153 Numeric Values Numeric values can be entered in any form i e with sign decimal point and exponent Values exceeding the resolution of the instrument are rou...

Page 167: ...sent the numeric values 9 9E37 or 9 9E37 respectively INF and NINF are only sent as instrument respon ses NAN Not A Number NAN represents the value 9 91E37 NAN is only sent as a instrument response This value is not defined Possible causes are the division of zero by zero the subtraction of infinite from infinite and the representation of miss ing values Example Setting command SENSe LIST FREQ MAX...

Page 168: ...a block data parameter has the following structure FORMat READings DATA 45168xxxxxxxx The ASCII character introduces the data block The next number indicates how many of the following digits describe the length of the data block In the example the 4 follow ing digits indicate the length to be 5168 bytes The data bytes follow During the trans mission of these data bytes all end or other control sig...

Page 169: ...Ientation LANDscape PORTrait Command HCOP PAGE ORI LAND specifies landscape orientation Command HCOP PAGE ORI PORT specifies portrait orientation Mnemonics A selection of mnemonics with an identical effect exists for several commands These mnemonics are indicated in the same line they are separated by a vertical stroke Only one of these mnemonics needs to be included in the header of the command T...

Page 170: ...he command line the second command begins with the level below HCOP The colon after the sem icolon is omitted The abbreviated form of the command line reads as follows HCOP ITEM ALL IMM Example HCOP ITEM ALL HCOP IMM A new command line always begins with the complete path 13 1 4 6 Responses to Queries A query is defined for each setting command unless explicitly specified otherwise It is formed by...

Page 171: ... commands do have to be executed in a defined order e g in order to avoid wrong measurement results they must be serviced sequentially This is called synchronization between the controller and the instrument Setting commands within one command line even though they may be implemented as sequential commands are not necessarily serviced in the order in which they have been received In order to make ...

Page 172: ...ing action to occur Table 13 4 Synchronization using OPC OPC and WAI Com mand Action Programming the controller OPC Sets the Operation Complete bit in the ESR after all previous commands have been exe cuted Setting bit 0 in the ESE Setting bit 5 in the SRE Waiting for service request SRQ OPC Stops command processing until 1 is returned This occurs when all pending opera tions are completed Send OP...

Page 173: ... service request indicates that the overlapped command has finished Event status register ESE 1 Set the OPC mask bit bit no 0 in the ESE ESE 1 2 Send the overlapped command without OPC OPC or WAI 3 Poll the operation complete state periodically with a timer using the sequence OPC ESR A return value LSB of 1 indicates that the overlapped command has finished 13 1 6 Suffix Overview Table 13 5 Overvi...

Page 174: ... event status enable register to the specified value The query returns the con tents of the event status enable register in decimal form Parameters Value Range 0 to 255 ESR Event status read Returns the contents of the event status register in decimal form and subsequently sets the register to zero Return values Contents Range 0 to 255 Usage Query only IDN Identification Returns the instrument ide...

Page 175: ...tification query Queries the options included in the instrument For a list of all available options and their description refer to the data sheet Return values Options The query returns a list of all installed and activated options separated by commas where B number describes hardware options K number describes software options Usage Query only RST Reset Sets the instrument to a defined default st...

Page 176: ...signal This common command complements the commands of the TRIGger subsystem TRG corresponds to the INITiate IMMediate command Usage Event TST Self test query Initiates self tests of the instrument and returns an error code Return values ErrorCode integer 0 in decimal format An error occurred 0 No errors occurred Usage Query only WAI Wait to continue Prevents servicing of the subsequent commands u...

Page 177: ...d initiates an instrument reset back to factory settings Example Reset the R S FPC1000 to its factory settings SYST PRES FACT Usage Event SYSTem PRESet MODE Mode This command selects the preset mode Parameters Mode DEFault Default preset state USER User defined preset state You can select a custom preset configuration with SYSTem PRESet USER Example Select a user defined preset SYST PRES MODE USER...

Page 178: ...t DHCP STATe 164 SYSTem COMMunicate LAN ETHernet This command queries the MAC address of the R S FPC1000 Return values MacAddress String containing the MAX address Example Query the MAC address SYST COMM LAN ETH Usage Query only SYSTem COMMunicate LAN GATeway Gateway This command selects the gateway in a LAN Prerequisites for this command Turn off DHCP SYSTem COMMunicate SOCKet DHCP STATe Paramete...

Page 179: ...ine IP address SYST COMM SOCK DHCP OFF SYST COMM SOCK ADDR 192 0 2 0 SYSTem COMMunicate SOCKet DHCP STATe State This command turns the Dynamic Host Configuration Protocol DHCP on and off When you turn on DHCP the network automatically assigns IP address subnet mask and gateway to the R S FPC1000 Parameters State ON OFF 1 0 RST ON 1 Example Activate DHCP SYST COMM SOCK DHCP ON 13 5 System Configura...

Page 180: ... panel of the R S FPC1000 Parameters Usage REFerence Input for external reference signal TRIGger Input for external trigger RST TRIGger Example Configure the BNC connector SYST BNC1 MODE TRIG SYSTem DATE Year Month Day This command defines the date of the system calendar Parameters Year numeric value integer Range 2000 to 2099 Month numeric value integer Range 1 to 12 Day numeric value integer Ran...

Page 181: ... No error Return values ErrorNumber Number that contains information about the error Negative num ber error as defined in the SCPI standard Positive number error that is specific to the R S FPC1000 Example Query complete error queue SYST ERR CODE ALL Usage Query only SYSTem ERRor CODE NEXT This command queries the code of the next error in the error queue If the error queue is empty the command re...

Page 182: ...ery only SYSTem HELP HEADers This command returns a list of all available remote control commands Return values Commands String containing all available remote control commands Example Return the syntax of all available commands SYST HELP HEAD Usage Query only SYSTem HELP SYNTax This command returns the full syntax of the specified command Return values Command String containing the command you wa...

Page 183: ...efines the time of the internal clock Parameters Hour numeric value integer Range 0 to 23 Minutes numeric value integer Range 0 to 59 Seconds numeric value integer Range 0 to 59 Example Change system time SYST TIME 12 30 30 SYSTem TZONee Hour Minutes This command defines a shift of the system time to select another time zone Parameters Hour numeric value integer Range 0 to 23 RST 0 Minutes numeric...

Page 184: ...s command selects the color scheme of the display Parameters ColorScheme COLor Color display BW Black and white display PF Printer friendly display of colors inverse colors RST COLor Example Select color scheme DISP CMAP BW DISPlay CMAP DEFault This command restored the default display configuration brightness and color scheme Example Restore the original display configuration DISP CMPA DEF Usage ...

Page 185: ...rameters State ON 1 An overload situation on one of the inputs produces a sound OFF 0 An overload produces no sound RST OFF Example Turn on audio output in case of overload SYST BEEP POV ON SYSTem BEEPer VOLume Volume This command defines the volume of the system beeper Parameters Volume numeric value Range 0 to 1 RST 0 6 60 Example Define the volume of the system beeper SYST BEEP VOL 0 50 13 8 Da...

Page 186: ...current display contents and stores it on the R S FPC1000 internal memory Prerequisites for this command Define a file name for the screenshot MMEMory NAME Example Make and store a screenshot of the current screen in a file Test png HCOP DEV LANG PNG MMEM NAME Public funny screenshot png HCOP Usage Event MMEMory CATalog This command queries the files that are in the currently selected directory Yo...

Page 187: ...Public Return all directories in the Public directory MMEM CAT DIR Usage Query only MMEMory CDIRectory PathName This command changes the current directory Parameters PathName String containing the path to the destination directory The path and file name comply with Windows conventions Note that the folder references in the string are case sensitive Example Open directory Public MMEM CDIR Public MM...

Page 188: ...a transfer When you query the contents of a file you can save them in a file on the remote con trol computer The command is useful for reading stored settings files or trace data from the instru ment or for transferring them to the instrument Prerequisites for this command Create an empty file MMEMory NAME Parameters FileName String containing the path and name of the file including the file name ...

Page 189: ...d deletes a file Setting parameters File String containing the path and name of the file including the file name extension The path and file name comply with Windows conventions Note that the folder and filename references in the string are case sensitive Example Delete a file MMEM DEL Public funny result set Usage Setting only MMEMory FILE FileName BlockData This command creates a file If you do ...

Page 190: ...name comply with Windows conventions Note that the folder and filename references in the string are case sensitive Year numeric value integer Range 2000 to 2107 Month numeric value integer Range 1 to 12 Day numeric value integer Range 1 to 31 Example Change date stamp of result set file MMEM FILE TIME 1 Public result set 2006 04 01 MMEMory FILE TIME FileName Hour Minutes Seconds This command defin...

Page 191: ...that the folder references in the string are case sensitive Setting parameters 1 numeric value Example Restore measurement configuration MMEM LOAD STAT 1 Public result set Usage Setting only MMEMory MDIRectory Directory This command creates a directory Setting parameters Directory String containing the path and new directory name The path and file name comply with Windows conventions Note that the...

Page 192: ...le Screen0006 png to the Test folder and rename the file Pic1 png MMEM MOVE Public Screen Shots Screen0001 png Public Test Pic1 png Usage Setting only MMEMory NAME FileName This command defines the path and file name of a screenshot You can take the actual screenshot with HCOPy IMMediate Parameters FileName String containing the path and name of the file including the file name extension png or jp...

Page 193: ...blic result set Usage Setting only SYSTem SET LOCK FileName This command adds write protection to a file Parameters FileName String containing the path and name of the dataset The path and file name comply with Windows conventions Note that the folder and filename references in the string are case sensitive Example Write protect a file SYST SET LOCK Public funny result set SYSTem SET UNLock FileNa...

Page 194: ...spectrum application INST SAN 13 10 Remote Commands of the Spectrum Application Measurements and Result Displays 179 Frequency 185 Amplitude 191 Bandwidth 197 Sweep Control 199 Trigger 201 Traces 203 Marker 208 Marker Functions 216 Display Lines 222 Limit Lines 223 13 10 1 Measurements and Result Displays The following commands are required for power measurements Note that the spectrogram result d...

Page 195: ...ine the best reference level the R S FPC1000 aborts current measure ments and performs a series of test sweeps After it has finished the test it continues with the actual measurement Prerequisites for this command Select and perform a power measurement CALCulate n MARKer m FUNCtion POWer SELect Suffix n m irrelevant Example Adjust the reference level CALC MARK FUNC LEV ONCE Usage Event CALCulate n...

Page 196: ...Ker m FUNCtion POWer PRESet Note that the command only checks the parameters that are defined by the standard Suffix n m irrelevant Return values State 0 R S FPC1000 settings violate a standard configuration 1 R S FPC1000 settings comply with the standard Example Query compliance to the standard currently in use CALC MARK FUNC POW PRES 3GPP WCDMA chpstd CALC MARK FUNC POW PRES CHEC Usage Query onl...

Page 197: ...upied bandwidth in Hz Example Select occupied bandwidth measurement CALC MARK FUNC POW SEL OBW CALC MARK FUNC POW PRES 3GPP WCDMA obwstd Turn on single sweep mode perform a measurement and query the results INIT CONT OFF INIT WAI CALC MARK FUNC POW RES OBW Usage Query only CALCulate n MARKer m FUNCtion POWer SELect Measurement This command selects a power measurement Suffix n m irrelevant Paramete...

Page 198: ...e n MARKer m FUNCtion POWer RESult PHZ 184 CALCulate n MARKer m FUNCtion CPOWer BANDwidth Bandwidth This command defines the channel bandwidth for channel power measurements Prerequisites for this command Select the channel power measurement CALCulate n MARKer m FUNCtion POWer SELect Suffix n irrelevant m irrelevant Parameters Bandwidth numeric value RST 3 84 MHz Default unit Hz Example Define the...

Page 199: ...MARKer m FUNCtion POWer SELect Suffix n irrelevant m Marker Parameters Unit DBM DBMV DBUV VOLT WATT V W RST DBM Example Select the unit for the channel power CALC MARK FUNC CPOW UNIT DBM CALCulate n MARKer m FUNCtion POWer RESult PHZ State This command turns the display of the channel power in a 1 Hz bandwidth on and off Prerequisites for this command Select the channel power measurement CALCulate...

Page 200: ...Suffix n irrelevant m irrelevant Parameters ChannelBW numeric value RST 3 84 MHz Default unit Hz Example Define a channel bandwidth CALC MARK FUNC OBW BAND 1 MHZ CALCulate n MARKer m FUNCtion OBW BANDwidth PCT Percentage CALCulate n MARKer m FUNCtion OBAN BANDwidth PCT Percentage This command defines the percentage of the total power that defines the occupied bandwidth Suffix n irrelevant m irrele...

Page 201: ...teger only RST depends on the channel table Example See SENSe CHANnel TABLe SELect SENSe CHANnel TABLe SELect DOWNlink ChannelTable This command selects a channel table configured for downlink signals Prerequisites for this command Select downlink mode SENSe CHANnel TABLe SET Parameters ChannelTable String containing the name of the channel table RST Example See SENSe CHANnel TABLe SELect SENSe CH...

Page 202: ...owing commands replace the uplink channel table TV China with TV Italy CHAN TABL SEL Public Channel Tables TV TV Italy chntab or CHAN TABL SEL UPL Public Channel Tables TV TV Italy chntab Downlink channel tables are not affected by the commands sent so far Select a particular uplink channel e g 10 instead of a cen ter frequency FREQ INP MODE CHAN CHAN 10 To select an additional downlink channel ta...

Page 203: ...his command Turn off step size coupling SENSe FREQuency CENTer STEP LINK Parameters StepSize numeric value Range 1 Hz to fmax RST AUTO 0 1 SPAN is switched on Default unit Hz Example Define a CF step size FREQ CENT STEP LINK OFF FREQ CENT STEP 10MHZ SENSe FREQuency CENTer STEP LINK StepSizeCoupling This command selects the center frequency step size mode For time domain measurements the command co...

Page 204: ...ined in terms of a channel You can select the channel with SENSe CHANnel RST FREQ Example Set the frequency mode to work with channel tables FREQ INP MODE CHAN SENSe FREQuency MODE OperationMode This command selects the measurement domain frequency or time In the time domain CW and FIXed set the frequency with SENSe FREQuency CENTer In the frequency domain SWEep set it with SENSe FREQuency CENTer ...

Page 205: ...asheet for details on the frequency range of your R S FPC1000 RST fmax with fmax maximum frequency Default unit Hz Example Define frequency span FREQ SPAN 10MHZ SENSe FREQuency SPAN FULL This command restores the full span Refer to the datasheet for details on the frequency range of your R S FPC1000 Example Restore full span FREQ SPAN FULL Usage Event SENSe FREQuency STARt Frequency This command d...

Page 206: ...t Y SCALe 192 DISPlay n WINDow TRACe t Y SCALe ADJust 192 DISPlay n WINDow TRACe t Y SCALe RLEVel 193 DISPlay n WINDow TRACe t Y SCALe RLEVel OFFSet 193 DISPlay n WINDow TRACe t Y SCALe RPOSition 193 INPut ATTenuation 194 INPut ATTenuation AUTO 194 INPut ATTenuation MODE 194 INPut GAIN STATe 195 INPut IMPedance 195 INPut IMPedance PAD 195 SENSe CORRection TRANsducer td SELect 196 SENSe CORRection ...

Page 207: ...Le DisplayRange This command defines the display range of the vertical axis Prerequisites for this command Select logarithmic scale for the y axis DISPlay n WINDow TRACe t Y SPACing For a linear scale you cannot modify the display range as it is fixed Suffix n irrelevant t irrelevant Parameters DisplayRange numeric value Range 1 to 150 dB RST 100 dB Default unit dB Example Define display range DIS...

Page 208: ...t Offset This command defines a reference level offset Suffix n irrelevant t irrelevant Parameters Offset numeric value Range 100 to 100 dB RST 0 dB Default unit dB Example Define a level offset DISP TRAC Y RLEV OFFS 10dB DISPlay n WINDow TRACe t Y SCALe RPOSition Position This command defines the position of the reference level on the display grid Prerequisites for this command Select logarithmic...

Page 209: ...rrently defined reference level is not com patible to the selected attenuation Parameters Attenuation numeric value Range 0 to 40 Increment 5 RST 0 AUTO is ON Default unit dB Example Select attenuation INP ATT 30dB INPut ATTenuation AUTO State This command turns automatic selection of the attenuation level on and off Parameters State ON OFF 1 0 RST ON 1 Example Turn on automatic attenuation select...

Page 210: ...mpedance The selected impedance is taken into account in all level indications of results When you need to select a 75 Ω impedance the 50 Ω impedance is transformed to a higher impedance A 75 Ω matching pad is required for this transformation The correc tion value in that case is 1 76 dB 10log 75Ω 50Ω Prerequisites for this command Select a matching pad INPut IMPedance PAD Parameters Impedance 50 ...

Page 211: ...s a new transducer fac tor Example Select primary transducer CORR TRAN1 SEL HE200A 20 200 pritrd Select secondary transducer CORR TRAN2 SEL PreAmp sectrd SENSe CORRection TRANsducer td UNIT This command queries the unit of the current transducer factor Prerequisites for this command Select a transducer SENSe CORRection TRANsducer td SELect Suffix td Transducer Return values Unit Example Query the ...

Page 212: ...n irrelevant Parameters Unit DBM DBUV DBMV V W DUVM DUAM V_M W_M2 Note that the availability of units depends on the operating mode RST dBm Example Select displayed unit UNIT POW DBUV 13 10 4 Bandwidth SENSe BWIDth RESolution 197 SENSe BANDwidth RESolution 197 SENSe BWIDth RESolution AUTO 198 SENSe BANDwidth RESolution AUTO 198 SENSe BWIDth VIDeo 198 SENSe BANDwidth VIDeo 198 SENSe BWIDth VIDeo AU...

Page 213: ... this command Turn on automatic RBW selection to couple the RBW to the span When you turn off automatic selection of the resolution bandwidth you can select one manually with SENSe BANDwidth RESolution Parameters State ON OFF 1 0 RST ON 1 Example Turn on automatic RBW selection BAND AUTO OFF SENSe BWIDth VIDeo Bandwidth SENSe BANDwidth VIDeo Bandwidth This command selects the video bandwidth Effec...

Page 214: ...of the subsequent command before the measure ment has been aborted successfully use the OPC or WAI command after ABORt and before the next command Note on blocked remote control programs If a sequential command cannot be completed for example because a triggered sweep never receives a trigger the remote control program will never finish and the remote channel to the R S FPC1000 is blocked for furt...

Page 215: ...e SWE TIME 10s SENSe SWEep TIME AUTO State This command couples and decouples the sweep time to the span and the resolution and video bandwidths Effects of this command Turn on automatic sweep time selection to couple the sweep time to the span and the RBW When you turn off automatic selection of the sweep time you can select one manually with SENSe SWEep TIME Parameters State ON OFF 1 0 RST ON 1 ...

Page 216: ... to the end of the mea surement is not possible Thus it is not recommended that you use continuous sweep mode in remote control as results like trace data or markers are only valid after a sin gle sweep end synchronization Example Start a single sweep and wait to end of sweep INIT CONT OFF INIT WAI Usage Event 13 10 6 Trigger TRIGger SEQuence HOLDoff TIME 201 TRIGger SEQuence LEVel VIDeo 202 TRIGg...

Page 217: ...teger Range 0 to 100 RST 50 Example Define video trigger condition FREQ SPAN 0 TRIG SOUR VID TRIG LEV VID 50 TRIGger SEQuence SLOPe TriggerSlope This command selects the slope of the trigger signal Prerequisites for this command Select an external trigger source TRIGger SEQuence SOURce Parameters TriggerSlope POSitive NEGative RST POSitive Example Select external trigger with a rising edge TRIG SO...

Page 218: ...Play n WINDow TRACe t MODE 205 DISPlay n WINDow TRACe t STATe 205 FORMat DATA 206 SENSe DETector t FUNCtion 206 SENSe DETector t FUNCtion AUTO 207 SENSe SWEep COUNt 207 TRACe t DATA 207 CALCulate n MATH t COPY MEMory MemorySlot This command copies a trace into the memory of the R S FPC1000 Prerequisites for this command Turn on a trace with a trace mode other than Blank DISPlay n WINDow TRACe t MO...

Page 219: ... 1 from the memory trace Example Define trace mathematics for trace 1 DISP TRAC ON DISP TRAC MODE AVER CALC MATH COPY MEM CALC MATH STAT ON CALC MATH IMPLIED MEMORY CALCulate n MATH t STATe State This command turns trace mathematics on and off Suffix n irrelevant t irrelevant Parameters State ON OFF 1 0 RST OFF 0 Example Turn on trace mathematics CALC MATH STAT ON DISPlay n WINDow TRACe t MEMory S...

Page 220: ...he average count is possible only in single sweep mode Suffix n irrelevant t Trace Parameters TraceMode You can turn off the trace with DISPlay n WINDow TRACe t STATe trace mode Blank For more information about the trace modes see Selecting the trace mode on page 94 AVERage Average trace mode MAXHold Max Hold trace mode MINHold Min Hold trace mode VIEW View trace mode WRITe Clear Write trace mode ...

Page 221: ...754 floating point numbers in the definite length block format RST ASCii In REAL 32 format a string of return values would look like 42524 value 1 value 2 value n with 4 Number of digits of the following number of data bytes 4 in this example 2524 Number of following data bytes 2524 corresponds to the 631 sweep points of the R S FPC1000 value 4 byte floating point value Example Select the ASCii da...

Page 222: ...Select average trace mode DISPlay n WINDow TRACe t MODE Parameters SweepCount numeric value integer Range 0 to 999 RST 1 Example Average over 64 sweeps DISP TRAC MODE AVER SWE COUN 64 Turn on single sweep mode start the sweep and wait for its end INIT CONT OFF INIT WAI TRACe t DATA ResultType This command queries the trace data of the current measurement It also transfers data from a file to a par...

Page 223: ...LTamarker m X 210 CALCulate n DELTamarker m X RELative 210 CALCulate n DELTamarker m Y 211 CALCulate n MARKer m AOFF 212 CALCulate n MARKer m FREQuency MODE 212 CALCulate n MARKer m FUNCtion CENTer 212 CALCulate n MARKer m FUNCtion REFerence 212 CALCulate n MARKer m MAXimum NEXT 213 CALCulate n MARKer m MAXimum PEAK 213 CALCulate n MARKer m MINimum PEAK 213 CALCulate n MARKer m STATe 214 CALCulate...

Page 224: ...If the delta marker is not active yet the command also turns on that delta marker Suffix n irrelevant m Marker Example Move delta marker 3 to the peak level CALC DELT3 MAX Usage Event CALCulate n DELTamarker m MINimum PEAK This command positions a delta marker on the current trace minimum If the delta marker is not active yet the command also turns on that delta marker Suffix n irrelevant m Marker...

Page 225: ...ker outside the visible trace In that case this value is invalid If necessary the corresponding delta marker is activated first Suffix n irrelevant m Marker Parameters Position numeric value The unit depends on the measurement and marker input mode Hz for measurements in the frequency domain s for measurements in the time domain No unit for channel input mode CALCulate n MARKer m FREQuency MODE Ex...

Page 226: ...essary the corresponding delta marker is activated first To get a valid result you have to perform a complete sweep with synchronization to the sweep end between activating the delta marker and reading out the result This is only possible in single sweep mode Suffix n irrelevant m Marker Return values Position In spectrum analyzer mode the unit depends on the unit you have set and the scaling of t...

Page 227: ...rameters Mode FREQuency Set the marker frequency mode to frequency input in Hz CHANnel Set the marker frequency mode to channel input as a channel number Example Select the frequency display mode CALC MARK FREQ MODE FREQ CALCulate n MARKer m FUNCtion CENTer This command matches the center frequency to the frequency of a marker Suffix n irrelevant m Marker Example Match the center frequency to the ...

Page 228: ...ge Event CALCulate n MARKer m MAXimum PEAK This command positions a marker on the current trace maximum If the marker is not active yet the command also turns on that marker Suffix n irrelevant m Marker Example Move marker 2 to the maximum peak CALC MARK2 MAX Usage Event CALCulate n MARKer m MINimum PEAK This command positions a marker on the current trace minimum If the marker is not active yet t...

Page 229: ...the command turns these delta markers into normal markers Note that it is possible to place the marker outside the visible trace In that case this value is invalid If necessary the corresponding delta marker is activated first Suffix n irrelevant m Marker Parameters Position numeric value The unit depends on the measurement and marker input mode Hz for measurements in the frequency domain s for me...

Page 230: ...LIMits slim RIGHt SearchLimit This command defines the right limit of the marker search range Prerequisites for this command Turn on marker search limits CALCulate n MARKer m X SLIMits slim STATe If you perform a measurement in zero span this command limits the evaluation range on the trace Suffix n m slim irrelevant Parameters SearchLimit numeric value The unit depends on the measurement Hz for f...

Page 231: ...synchronization to the sweep end between activating the delta marker and reading out the result This is only possible in single sweep mode Suffix n irrelevant m Marker Return values Position numeric value The unit depends on UNIT n POWer Example Turn on single sweep mode and marker 2 INIT CONT OFF CALC MARK2 ON Start a sweep and wait for the end INIT WAI Query the position of marker 2 CALC MARK2 X...

Page 232: ...is only possible in single sweep mode Prerequisites for this command Turn on the frequency counter CALCulate n MARKer m COUNt STATe Suffix n irrelevant m irrelevant Return values Frequency numeric value Default unit Hz Example See CALCulate n MARKer m COUNt STATe Usage Query only CALCulate n MARKer m COUNt STATe State This command turns the frequency counter at the marker position on and off You c...

Page 233: ...ncy span 0 SENSe FREQuency SPAN For measurement in the time domain span 0 the command has no effect because demodulation is continuous Suffix n irrelevant m irrelevant Parameters Time numeric value Range 100 ms to 500 s RST 500 ms Default unit s Example Configure marker demodulation FREQ SPAN 100MHZ CALC MARK ON CALC MARK X 100MHZ CALC MARK FUNC DEM ON CALC MARK FUNC DEM SEL FM CALC MARK FUNC DEM ...

Page 234: ...ate n MARKer m FUNCtion DEModulation HOLD CALCulate n MARKer m FUNCtion NDBDown MarkerDistance This command defines the distance of the n dB down markers to the reference marker Suffix n irrelevant m irrelevant the n dB down marker function always uses marker 1 Parameters MarkerDistance numeric value Distance of the temporary markers to the reference marker in dB RST 3 dB Default unit dB Example S...

Page 235: ... n MARKer m FUNCtion NDBDown RESult This command queries the frequency spacing or bandwidth of the n dB down markers Suffix n irrelevant m irrelevant the n dB down marker function always uses marker 1 Return values Bandwidth Default unit Hz Example See CALCulate n MARKer m FUNCtion NDBDown STATe Usage Query only CALCulate n MARKer m FUNCtion NDBDown STATe State This command turns the n dB down mar...

Page 236: ...d before reading out the result This is only possible in single sweep mode Suffix n irrelevant m Marker Only marker 1 M1 or delta marker 2 D2 are possible to select Return values NoiseLevel The unit depends on UNIT n POWer Example Turn on single sweep mode INIT CONT OFF Turn on marker and assign the noise measurement to that marker CALC MARK ON CALC MARK FUNC NOIS ON Perform the measurement and qu...

Page 237: ...tes for this command Turn on a display line CALCulate n DLINe STATe Suffix n irrelevant Parameters Position numeric value You can use any unit you want the R S FPC1000 then con verts the unit to the currently selected unit If you omit a unit the R S FPC1000 uses the currently selected unit RST STATe to OFF Default unit Example Position display line CALC DLIN STAT ON CALC DLIN 20dBm CALCulate n DLI...

Page 238: ...UPPer THReshold 228 CALCulate n LIMit k BEEP STATe State This command turns the beeper that beeps if a limit line is violated on and off Suffix n irrelevant k Limit line Parameters State ON OFF 1 0 RST OFF 0 Example Activate the audio beep CALC LIM BEEP ON CALCulate n LIMit k COMMent This command queries the description of a limit line Prerequisites for this command Select a limit line or define a...

Page 239: ...late n LIMit k UPPer THReshold Suffix n irrelevant k Limit line Parameters Name String containing the name of the limit line Note If a limit line with the same name already exists it will be overwritten Description String containing a description of the limit line X unit Hz s X scale ABSolute RELative Y unit DB DBM DBUV DBMV DBUVM DBUAM VSWR V W X_n numeric value Data points on the x axis The firs...

Page 240: ...hold CALCulate n LIMit k UPPer SELect CALCulate n LIMit k UPPer THReshold Suffix n irrelevant k Limit line Example Remove limit line CALC LIM2 DEL CALCulate n LIMit k FAIL This command queries the result of a limit check To get a valid result you have to perform a complete sweep with synchronization to the sweep end before reading out the result This is only possible in single sweep mode Prerequis...

Page 241: ... LimitLine String containing the file name of the lower limit line Example Select the lower limit line FREQ SPAN 0HZ CALC LIM LOW SEL GSM_Lower rellim Usage Setting only CALCulate n LIMit k LOWer THReshold Level This command defines the level of a lower threshold limit line Suffix n irrelevant k Limit line Parameters Level numeric value Unit depends on the unit you have currently selected for the ...

Page 242: ...imit line on the x axis Prerequisites for this command Select a limit line or define a threshold limit with one of the following commands CALCulate n LIMit k LOWer SELect CALCulate n LIMit k LOWer THReshold CALCulate n LIMit k UPPer SELect CALCulate n LIMit k UPPer THReshold Suffix n irrelevant k Limit line Return values Unit Example Query the x unit of the first limit line CALC LIM UPP THR 70 CAL...

Page 243: ... select a limit line that is already stored on the internal memory or create a new one with CALCulate n LIMit k DEFine Suffix n irrelevant k Limit line Setting parameters LimitLine String containing the file name of the upper limit line Example Select the upper limit line FREQ SPAN 0HZ CALC LIM UPP SEL GSM_Upper rellim Usage Setting only CALCulate n LIMit k UPPer THReshold Level This command defin...

Page 244: ... BARGraph PHOLd RESet This command resets the maxhold information in the fixed frequency measurement and the frequency scan Example Reset maxhold information DISP BARG PHOL RES Usage Event SENSe FREQuency MODE Mode This command select the receiver measurement mode Parameters Mode FIXed CW Selects fixed frequency measurements SCAN Selects frequency scan measurements RST FIXed Example Select frequen...

Page 245: ...FREQuency INPut MODE Channel selection SENSe CHANnel SENSe FREQuency CENTer 230 SENSe SCAN STARt 230 SENSe SCAN STEP 231 SENSe SCAN STOP 231 SENSe FREQuency CENTer Frequency This command defines the receiver frequency Prerequisites for this command Select fixed frequency scan SENSe FREQuency MODE Parameters Frequency numeric value Default unit Hz Example Define a receiver frequency for fixed frequ...

Page 246: ...an range with measurement every 10 MHz FREQ MODE SCAN SCAN STAR 30MHZ SCAN STOP 100MHZ SCAN STEP 10MHZ SENSe SCAN STOP Frequency This command defines the start frequency for a frequency scan Prerequisites for this command Select frequency scan SENSe FREQuency MODE Parameters Frequency numeric value Default unit Hz Example Define scan range with measurement every 10 MHz FREQ MODE SCAN SCAN STAR 30M...

Page 247: ...dance PAD Transducer SENSe CORRection TRANsducer td SELect SENSe CORRection TRANsducer td UNIT SENSe CORRection TRANsducer td STATe 13 11 4 Bandwidth Commands to configure the bandwidth described elsewhere Resolution bandwidth 3 dB SENSe BANDwidth RESolution SENSe BANDwidth RESolution CISPr 232 SENSe BANDwidth RESolution CISPr AUTO 233 SENSe BANDwidth RESolution CISPr Bandwidth This command select...

Page 248: ...Measurement control INITiate IMMediate Measurement type single continuous INITiate CONTinuous Measurement time SENSe SWEep TIME 13 11 6 Trigger Commands to configure trigger described elsewhere Trigger slope TRIGger SEQuence SLOPe TRIGger SEQuence SOURce 233 TRIGger SEQuence SOURce TriggerSource This command selects the trigger source Parameters TriggerSource IMMediate No trigger is applied EXTern...

Page 249: ... RST POSitive Example Select quasipeak detector DET QUAS DISPlay WINDow TRACe STYLe Style This command selects the style of the trace display Prerequisites for this command Select frequency scan SENSe FREQuency MODE Parameters TraceStyle LINes Shows the results in form of a line trace with interpolation between the receiver frequencies POLYgon Shows the results in form of vertical lines at each re...

Page 250: ... X SLIMits slim STATe Commands to configure delta markers described elsewhere Delta marker state on off CALCulate n DELTamarker m STATe CALCulate n DELTamarker m AOFF Delta marker position CALCulate n DELTamarker m X CALCulate n DELTamarker m X RELative CALCulate n DELTamarker m Y Delta marker position set to peak CALCulate n DELTamarker m MAXimum PEAK Delta marker position set to next peak CALCul...

Page 251: ...Sweep Control 243 Limits 243 13 12 1 Measurements and Result Displays CALCulate n FEED 236 CALCulate n MARKer FUNCtion ADEMod AFRequency RESult 237 CALCulate n MARKer FUNCtion ADEMod AM RESult 237 CALCulate n MARKer FUNCtion ADEMod CARRier RESult 238 CALCulate n MARKer FUNCtion ADEMod FERRor RESult 238 CALCulate n MARKer FUNCtion ADEMod FM RESult 238 CALCulate n MARKer FUNCtion ADEMod MINDex RESul...

Page 252: ...ncy numeric value Default unit Hz Example Query modulation frequency CALC MARK FUNC ADEM AFR Usage Query only CALCulate n MARKer FUNCtion ADEMod AM RESult MeasType This command queries the modulation characteristics of an AM signal Prerequisites for this command Measure an AM signal CALCulate n FEED Suffix n irrelevant Query parameters MeasType MIDDle Queries the average modulation index MPEak Que...

Page 253: ...er power CALC MARK FUNC ADEM CARR Usage Query only CALCulate n MARKer FUNCtion ADEMod FERRor RESult This command queries the carrier frequency offset Suffix n irrelevant Return values FrequencyError numeric value Default unit Hz Example Query carrier frequency offset CALC MARK FUNC ADEM FERR Usage Query only CALCulate n MARKer FUNCtion ADEMod FM RESult MeasType This command queries the modulation ...

Page 254: ...ly CALCulate n MARKer FUNCtion ADEMod MINDex RESult This command queries the modulation index Prerequisites for this command Measure an AM signal CALCulate n FEED Suffix n irrelevant Return values ModIndex numeric value Default unit PCT Example Query modulation index CALC FEED XTIM AMS CALC MARK FUNC ADEM MIND Usage Query only CALCulate n MARKer FUNCtion ADEMod SINad RESult This command queries th...

Page 255: ...LCulate n FEED Return values Frequency numeric value Default unit Hz Example Query frequency deviation CALC FEED XTIM FMS ADEM FM OFFS Usage Query only TRACe DATA This command queries the trace data measurement results in graphical result dis plays Prerequisites for this command Select graphical result display CALCulate n FEED Return values Results Returns one value for each measurement point The ...

Page 256: ... INPut ATTenuation MODE Impedance INPut IMPedance INPut IMPedance PAD DISPlay n WINDow TRACe t Y SCALe PDIVision 241 DISPlay n WINDow TRACe t Y SCALe PDIVision Scale This command defines the range of the y axis for the graphical results Suffix n irrelevant t irrelevant Parameters Scale numeric value integer only The unit depends on the result PCT for AM results 0 1 to 100 per grid division Hz for ...

Page 257: ... SENSe FILTer DEMPhasis STATe State This command turns the deemphasis filter on and off You can select the time constant of the filter with SENSe FILTer DEMPhasis TCONstant Prerequisites for this command Select 200 kHz or 300 kHz demodulation bandwidth SENSe ADEMod BANDwidth DEModulation Parameters State ON OFF 1 0 RST OFF Example Turn on deemphasis filter ADEM BAND DEM 300KHZ FILT DEMP ON SENSe F...

Page 258: ...ement time Return values Time numeric value Default unit s Example Query measurement time ADEM MTIM Usage Query only 13 12 6 Limits Commands to configure limits described elsewhere Beeper CALCulate n LIMit k BEEP STATe CALCulate n ADEModulation LIMit DELete 243 CALCulate n ADEModulation LIMit FAIL 244 CALCulate n ADEModulation LIMit SELect 244 CALCulate n ADEModulation LIMit DELete This command re...

Page 259: ... ADEM LIM FAIL Usage Query only CALCulate n ADEModulation LIMit SELect Filename This command selects a set of limit values for AM and FM measurements Selecting a set of limit values automatically initiates a limit check of the numerical results Suffix n irrelevant Parameters Filename String containing the file name of the limits definition file The file extension is either amlim AM limits or fmlim...

Page 260: ...ror RESult 248 CALCulate n MARKer FUNCtion DDEMod MPOWer RESult 248 SENSe DDEMod 248 SENSe DDEMod FSK OFFSet 249 TRACe DATA 249 CALCulate n FEED ResultDisplay This command selects the result display Suffix n irrelevant Parameters ResultDisplay XTIM DDEM ERR MPH Selects the modulation error result display XTIM DDEM EYE Selects the eye diagram XTIM DDEM MEAS Selects the modulation depth ASK or modul...

Page 261: ...ol Example Query carrier frequency drift CALC MARK FUNC DDEM CFDR Usage Query only CALCulate n MARKer FUNCtion DDEMod CFERror RESult This command queries the carrier frequency error of the measured signal Suffix n irrelevant Return values Frequency numeric value Default unit Hz Example Query carrier frequency error CALC MARK FUNC DDEM CFER Usage Query only CALCulate n MARKer FUNCtion DDEMod MDEPth...

Page 262: ...requency deviation CALC MARK FUNC DDEM MDEV Usage Query only CALCulate n MARKer FUNCtion DDEMod MERRor RESult This command queries the magnitude error of the measured signal Prerequisites for this command Select FSK demodulation SENSe DDEMod Suffix n irrelevant Return values MagnitudeError numeric value Default unit PCT Example Query magnitude error CALC MARK FUNC DDEM MERR Usage Query only CALCul...

Page 263: ...r numeric value Default unit PCT Example Query modulation error CALC MARK FUNC DDEM MOER Usage Query only CALCulate n MARKer FUNCtion DDEMod MPOWer RESult This command queries the power of the carrier signal Suffix n irrelevant Return values Power numeric value Default unit dBm Example Query carrier power CALC MARK FUNC DDEM MPOW Usage Query only SENSe DDEMod Measurement This command selects the d...

Page 264: ... Query only TRACe DATA This command queries the trace data measurement results in graphical result dis plays Return values Results Returns one value for each measurement point The type of value depends on the measurement and result dis play Symbols returns the symbol stream Modulation Deviation returns one value frequency deviation for each symbol in Hz Modulation Depth returns one value modulatio...

Page 265: ...ll off factor DDEM FILT ALPH 0 35 SENSe DDEMod FILTer NAME FilterType This command selects the measurement filter You can define the filter shape with SENSe DDEMod FILTer ALPHa Parameters FilterType If you want to use no filter unfiltered measurements use SENSe DDEMod FILTer STATe GAUS Select a Gaussian filter RC Select a raised cosine filter RRC Selects a root raised cosine filter RST GAUS Exampl...

Page 266: ...er only Default unit Hz Example Define symbol rate DDEM SRAT 10KHZ SENSe DDEMod TIME Symbols This command defines the number of symbols to be evaluated Parameters Symbols numeric value integer only Range 20 to depends on measurement filter RST 100 Example Define the number of symbols DDEM TIME 150 13 13 3 Frequency Commands to configure the frequency described elsewhere Center frequency SENSe FREQ...

Page 267: ...nd defines the range of the y axis for the graphical results Suffix n irrelevant t irrelevant Parameters Scale numeric value integer only The unit depends on the result PCT for ASK results 1 to 100 per grid division Hz for FSK results 1 kHz to 1 MHz per grid division Example Define grid scale of AM results 50 percent per grid CALC FEED XTIM DDEM MEAS DISP TRAC Y PDIV 50 DISPlay n WINDow TRACe t Y ...

Page 268: ...re Marker state on off CALCulate n MARKer m STATe CALCulate n MARKer m AOFF Marker position CALCulate n MARKer m X CALCulate n MARKer m Y Commands to configure delta markers described elsewhere Delta marker state on off CALCulate n DELTamarker m STATe CALCulate n DELTamarker m AOFF Delta marker position CALCulate n DELTamarker m X CALCulate n DELTamarker m X RELative CALCulate n DELTamarker m Y 13...

Page 269: ...bit in the STB Structure of a SCPI Status Register 254 Overview of the Status Registers 257 Status Byte STB and Service Request Enable Register SRE 257 Event Status Register ESR and Event Status Enable Register ESE 258 STATus OPERation Register 259 STATus QUEStionable Register 259 STATus QUEStionable FREQuency Register 260 STATus QUEStionable LIMit Register 260 STATus QUEStionable POWer Register 2...

Page 270: ...R bit 0 the EVENt bit is not set This part can be written into and read at will Its contents is not affected by reading NTRansition part The Negative TRansition NTR part also acts as an edge detector When a bit of the CONDition part is changed from 1 to 0 the associated NTR bit decides whether the EVENt bit is set to 1 NTR Bit 1 the EVENt bit is set NTR Bit 0 the EVENt bit is not set This part can...

Page 271: ...en into and read by the user at will Its contents is not affected by reading Sum bit As indicated above the sum bit is obtained from the EVENt and ENABle part for each register The result is then entered into a bit of the CONDition part of the higher order register The instrument automatically generates the sum bit for each register Thus an event e g a PLL that has not locked can lead to a service...

Page 272: ...reserved reserved reserved reserved reserved reserved reserved reserved reserved reserved not used QUEStionable LIMit 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 reserved reserved IF_Overload reserved reserved reserved reserved reserved reserved reserved reserved reserved reserved reserved reserved not used QUEStionable POWer Figure 13 6 Overview of the status registers 13 14 3 Status Byte STB and Servi...

Page 273: ...This bit can be used to enable data to be automatically read from the instrument to the controller 5 ESB bit Sum bit of the event status register It is set if one of the bits in the event status register is set and enabled in the event status enable register Setting of this bit indicates a serious error which can be specified in greater detail by polling the event status register 6 MSS bit master ...

Page 274: ...notes the error in greater detail is entered into the error queue 5 Command Error This bit is set if a command is received which is undefined or syntactically incorrect An error message with a number between 100 and 200 which denotes the error in greater detail is entered into the error queue 6 Unused 7 Power On supply voltage on This bit is set on switching on the instrument 13 14 5 STATus OPERat...

Page 275: ...ference frequency It can be read using the commands STATus QUEStionable LIMit FREQuency and STATus QUEStionable FREQuency EVENt Table 13 10 Meaning of bits in STATus QUEStionable FREQuency register Bit number Meaning 0 to 7 Unused 8 EXTernal REFerence This bit is set if an external reference is used 9 to 14 Unused 15 This bit is always 0 13 14 8 STATus QUEStionable LIMit Register This register con...

Page 276: ...r certain circumstances the instrument can send a service request SRQ to the controller Usually this service request initiates an interrupt at the controller to which the control program can react appropriately As evident from Fig 1 4 an SRQ is always initiated if one or several of bits 2 3 4 5 or 7 of the status byte are set and enabled in the SRE Each of these bits combines the information of a ...

Page 277: ...ed register This number is evaluated by the controller program Queries are usually used after an SRQ in order to obtain more detailed information on the cause of the SRQ Error queue query Each error state in the instrument leads to an entry in the error queue The entries of the error queue are detailed plain text error messages that can be displayed via man ual operation using the setup menu or qu...

Page 278: ... in a command line that immediately follows a PROGRAM MESSAGE TERMINA TOR clears the output buffer 13 14 12 Remote Commands of the Status Reporting System The following commands control the status reporting system RST does not influence the status registers The OPERation status register contains information about the calibration status of the instrument The QUEStionable status register contains in...

Page 279: ...n 267 STATus PRESet This command resets the edge detectors and ENABle parts of all registers to a defined value All PTRansition parts are set to FFFFh i e all transitions from 0 to 1 are detec ted All NTRansition parts are set to 0 i e a transition from 1 to 0 in a CONDition bit is not detected The ENABle part of the STATus OPERation and STATus QUEStionable registers are set to 0 i e all events in...

Page 280: ...integer Range 0 to 65535 STATus OPERation NTRansition SumBit This command controls the Negative TRansition part of the OPERation register Setting a bit causes a 1 to 0 transition in the corresponding bit of the associated regis ter The transition also writes a 1 into the associated bit of the corresponding EVENt register Parameters SumBit numeric value integer Range 0 to 65535 STATus OPERation PTR...

Page 281: ... QUEStionable ENABle SumBit This command controls the ENABle part of the QUEStionable register The ENABle part allows true conditions in the EVENt part of the status register to be reported in the summary bit If a bit is 1 in the enable register and its associated event bit transitions to true a positive transition will occur in the summary bit reported to the next higher level Parameters SumBit n...

Page 282: ...sition SumBit STATus QUEStionable PTRansition SumBit This command control the Positive TRansition part of the QUEStionable register Setting a bit causes a 0 to 1 transition in the corresponding bit of the associated regis ter The transition also writes a 1 into the associated bit of the corresponding EVENt register Parameters SumBit numeric value integer Range 0 to 65535 Status Reporting System 北京...

Page 283: ...87 SENSe CORRection TRANsducer td SELect 196 SENSe CORRection TRANsducer td UNIT 196 SENSe CORRection TRANsducer td STATe 196 SENSe DDEMod 248 SENSe DDEMod FILTer ALPHa 250 SENSe DDEMod FILTer NAME 250 SENSe DDEMod FILTer STATe 250 SENSe DDEMod FSK OFFSet 249 SENSe DDEMod SRATe 251 SENSe DDEMod TIME 251 SENSe DETector t FUNCtion 206 SENSe DETector t FUNCtion 234 SENSe DETector t FUNCtion AUTO 207 ...

Page 284: ... RELative 210 CALCulate n DELTamarker m Y 211 CALCulate n DELTamarker m STATe 209 CALCulate n DLINe 222 CALCulate n DLINe STATe 222 CALCulate n FEED 236 CALCulate n FEED 245 CALCulate n LIMit k BEEP STATe 223 CALCulate n LIMit k COMMent 223 CALCulate n LIMit k DEFine 224 CALCulate n LIMit k DELete 225 CALCulate n LIMit k FAIL 225 CALCulate n LIMit k LOWer SELect 226 CALCulate n LIMit k LOWer THRes...

Page 285: ...CALCulate n MARKer m FUNCtion DEModulation SELect 218 CALCulate n MARKer m FUNCtion DEModulation STATe 219 CALCulate n MARKer m FUNCtion FIXed 236 CALCulate n MARKer m FUNCtion LEVel ONCE 180 CALCulate n MARKer m FUNCtion NDBDown 219 CALCulate n MARKer m FUNCtion NDBDown FREQuency 219 CALCulate n MARKer m FUNCtion NDBDown RESult 220 CALCulate n MARKer m FUNCtion NDBDown STATe 220 CALCulate n MARKe...

Page 286: ...n 252 DISPlay n WINDow TRACe t Y SCALe RLEVel 193 DISPlay n WINDow TRACe t Y SCALe RLEVel OFFSet 193 DISPlay n WINDow TRACe t Y SCALe RPOSition 193 DISPlay n WINDow TRACe t Y SCALe RPOSition 252 DISPlay n WINDow TRACe t STATe 205 FORMat DATA 206 HCOPy DEVice LANGuage 171 HCOPy IMMediate 171 INITiate CONTinuous 200 INITiate IMMediate 201 INPut ATTenuation 194 INPut ATTenuation AUTO 194 INPut ATTenu...

Page 287: ...er CONDition 266 STATus QUEStionable POWer ENABle 266 STATus QUEStionable POWer NTRansition 266 STATus QUEStionable POWer PTRansition 267 STATus QUEStionable POWer EVENt 266 STATus QUEStionable PTRansition 267 STATus QUEStionable EVENt 266 STATus QUEue NEXT 264 SYSTem BEEPer KEY VOLume 170 SYSTem BEEPer POVerload STATe 170 SYSTem BEEPer VOLume 170 SYSTem BNC MODE 165 SYSTem COMMunicate LAN ETHerne...

Page 288: ...168 SYSTem TZONee 168 TRACe DATA 229 TRACe DATA 240 TRACe DATA 249 TRACe t DATA 207 TRIGger SEQuence HOLDoff TIME 201 TRIGger SEQuence LEVel VIDeo 202 TRIGger SEQuence SLOPe 202 TRIGger SEQuence SOURce 202 TRIGger SEQuence SOURce 233 UNIT n POWer 197 北京海洋兴业科技股份有限公司 证券代码 839145 www hyxyyq com ...

Page 289: ...53 Color scheme 37 Colors spectrogram 66 Comma 153 Command sequence Remote 161 Commands Brackets 153 Colon 153 Comma 153 Command line structure 155 Double dagger 153 Overlapping 156 Question mark 153 Quotation mark 153 Sequential 156 Syntax elements 153 Vertical stroke 153 White space 153 Common commands Syntax 149 Continuous measurement Analog demodulation 130 Digital demodulation 142 Receiver 11...

Page 290: ...annel power 55 Fixed frequency 111 Frequency scan 112 OBW 59 Measurement frequency 73 115 Measurement mode Analog demodulation 130 Digital demodulation 142 Receiver 119 Spectrum analyzer 89 Measurement sensitivity 80 82 Measurement time 89 119 Memory stick 40 MIN 152 Mnemonics 148 Optional 150 MobileView 25 Modulation depth 136 Modulation deviation 136 Modulation error 137 Modulation index 136 N n...

Page 291: ...dth measurement 104 Single measurement Analog demodulation 130 Digital demodulation 142 Receiver 119 Spectrum analyzer 89 Span 75 89 Spectrogram colors 66 Spectrogram playback 69 Standard Channel power 58 OBW 62 Start frequency 76 116 Status byte Remote 159 161 Step size 73 115 Stop frequency 76 116 Storage 40 String in remote commands 153 Subnet mask 33 Suffixes 150 Sweep mode 89 Sweep time 89 Sy...

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