Programmer`s Manual V1.4 - Berkeley Nucleonics Corporation
Contents
1. SYSTEM COMMUNICATE SUBSYSTEM UNIT SUBSYSTEM 1 Introduction This manual provides information for remote operation of the Berkeley Nucleonics Signal Generators using commands sent from an external controller via Ethernet USB or GPIB It includes the following A general description of the LAN and the bus data transfer and control functions Ageneral description of how to establish connection via LAN USB GPIB e Alisting of the IEEE 488 Interface Function Messages recognized by the signal generator with a description of its response e A complete listing and description of all the Standard Commands for Programmable Instruments SCPI commands that can be used to control signal generator operation with examples of command usage 2 Programming the instrument All instruments described in this manual can be accessed through LAN USB or GIPB interface All interfaces use standard SCPI command set to pass commands to the device While LAN is the preferred interface for Berkeley Nucleonics instruments GPIB is only optionally available for some models 2 4 Ethernet LAN All Berkeley Nucleonics signal generators are preferably remotely programmed via a 10 100 1000Base T LAN interface and LAN connected computer using one of several LAN interface protocols The LAN allows instruments to be connected together and controlled by a LAN based computer LAN and its associated interface operations are def2. 2 1 1 Ethernet Interface Connection and Setup 2 1 2 Using Sockets REIR 2 13 Using and Configuring VXI 11 VISA cccccccccesssssecesssececseseceesssseceessessessseecsesseseesssseceeaeseceesseseeeeaes 2 1 4 Using Telnet LAN Port 18 ccccccccsssscceessssccssscccesssseessssesesseeseceessesecessessessssecsesseseeseaseceeasseceessessenanes 9 2 2 vm 9 2 2 1 USB TMC Interface Connection and Setup USING 9 2 2 2 USB TMC Interface Connection and Setup using Berkeley Nucleonics 10 2 3 GPIB INTERFACE CONNECTION AND 5 1 1 1 1 saisi sa sisi si 10 2 3 1 General GPIB information eiie ee FRA VER Sa ERRARE 10 pr Eee ub M 10 3 IEEE 488 INTERFACE COMMANDS 3 1 IEEE MANDATED AND OPTIONAL COMMON COMMANDS 3 1 1 3 1 2 3 1 3 oj P M M 13 3 1 4 wit 13 3 1 5 oa 13 3 1 6 POP GPs 13 3 1 7 14 3 18 CG gt 3 1 9 ETE 3
3. gt The command writes data to a flatness correction file The query returns flatness correction file data Data sent or received has IEEE488 2 definite block data format lt num_digits gt lt byte_count gt lt data byte data byte num digits specifies how many digits are contained in byte count byte count specifies how many data bytes follow in data bytes Example of definite block data 2141000000000 1 0 214 byte count is two digits wide 214 14 data bytes will follow 1000000000 1 0 14 bytes of data The flatness correction data itself consists of values separated by semicolon and rows separated by carriage return r and or newline n Two values frequency in Hz power correction in dBm make a row Each row defines one flatness correction point Example of two points flatness correction first point 100 MHz 1 dB second point 200 MHz 1 dB 100000000 1 0 r n 200000000 1 0 r n MEMory FILE CORRection FLATness LOAD MEMory FILE CORRection FLATness LOAD lt file name gt This command loads a user flatness correction file The lt file name gt variable is the name of the file located in the directory USERFLAT The directory path is implied in the command and need not be specified in the variable name MEMory FILE CORRection FLATness STORe 33 MEMory FILE CORRection FLATness STORe lt file name gt This command stores the current user flatness correction dat
4. SOURce FREQuency MODE or SOURce POWer MODE command is issued RST INFinite Range INFinite or 2 65535 LIST DIRection SOURCce LIST DIRection UPIDOWN RANDom SOURce LIST DIRection This command sets the direction of a list or step sweep UP This choice enables a sweep in an ascending order first to last point for a list sweep start to stop for a step sweep DOWN This choice reverses the direction of the sweep 37 BNC RST UP LIST DWELI SOURce LIST DWELI lt value gt lt value gt SOURce LIST DWELI POINts This command sets the dwell time for the current list sweep RAM points Dwell time is used when IMMediate is the trigger source The dwell time is the amount of time the sweep is guaranteed to pause after setting the frequency and or power for the current point The setting enabled by this command is not affected by signal generator power on preset or RST The variable lt value gt is expressed in units of seconds LIST DELay SOURce LIST DELay lt value gt lt value gt SOURce LIST DELay POINts This command sets the off time for the current list sweep RAM points Off time is used when IMMediate is the trigger source The off time is the amount of time the output is guaranteed to be blanked after setting the frequency and or power for the current point to suppress output transients during a frequency change The setting enabled by this command is not affected by signal ge
5. ATTenuation LIST SOURce POWer AT Tenuation AUTO Devices with option PE only This query returns a comma separated list of available attenuation settings These can be set using the SOURce POWer ATTenuation command Available settings are 0 35 70 dB for option PE2A 0 10 20 70 dB for option PES 0 10 20 110 dB for option 4 0 35 70 105 dB for option PE5 3l BNC 5 8 SOURce CORRection Subsystem Command Parameters Unit Remark default SOURce CORRection FLATness MODE LOWer HIGHer INTerpolati INT SOURce CORRection FLATness PAIR SOURce CORRection FLATness POINts SOURce CORRection FLATness PRESet N A SOURce CORRection FLATness STATe MEMory FILE CORRection FLATness DATA gt lt gt N A MEMory FILE CORRection FLATness LOAD file gt N A MEMory FILE CORRection FLATness STORe file gt N A FLATness MODE SOURce CORRection FLATness MODE LOWer HIGHer INTerpolation This command defines how the flatness correction value will be determined at frequency settings below between or above the store correction pairs LOWer selects the pair at or below an output frequency setting HIGHer selects the pair at or above the output frequency setting INTerpolation selects linear interpolation between the two pairs closes to the output frequency setting Th
6. RST OFF VOR STATe SOURce VOR BEARing value RAD DEG SOURce VOR BEARing This command sets the VOR bearing in radians Append DEG to set the bearing in degrees RST OFF VOR TEST SOURce ILS GS TEST NORTh SOUTh EAST WEST 1 2 This command selects a predefined VOR test setting RST NORTh 55 BNC 5 19 TRIGger Subsystem Triggers control the playback by telling the BENCHTOP MICROWAVE SOURCEXO000 when to play the signal Depending on the trigger settings for the BENCHTOP MICROWAVE SOURCEX000 the waveform playback can occur once continuously or the BENCHTOP MICROWAVE SOURCEX000 may start and stop playing the waveform repeatedly GATE mode A trigger signal comprises both positive and negative signal transitions states which are also called high and low periods You can configure the BENCHTOP MICROWAVE SOURCEX000 to trigger on either state of the trigger signal It is common to have multiple triggers also referred to as trigger occurrences or events occur when the signal generator requires only a single trigger In this situation the BENCHTOP MICROWAVE SOURCEXO000 recognizes the first trigger and ignores the rest When you select a trigger mode you may lose the signal from the RF output until you trigger the waveform There are four parts to configuring the trigger Choosing the trigger type which controls the waveform s transmission 1 NORMal trigger edge initiates stops sweeps 2 GATE trigger
7. SOURce F REQuency STOP fmin to fmax Hz SOURce POWer MODE FIXed LIST SWEep SOURce POWer STARt lt value gt dBm SOURce POWer STOP lt value dBm SWEep COUNt INFinite lt value gt SOURce SWEep COUNt Infinite lt value gt SOURce SWEep COUNt This command sets the number of sweep repetitions being played after triggering a sweep If set to INFinite the sweep will be repeated until SOURce FREQuency MODE SOURce POWer MODE command is issued RST INFinite Range INFinite or 2 65535 SWEep DIRection UPIDOWN RANDom SOURce SWEep DIRection UP DOWN RANDom SWEep POINts SOURce SWEep POINts value SOURce SWEep POINts This command defines the number of step sweep points RST 101 Range 2 65535 SWEep DWELI SOURce SWEep DWELI value 43 BNC SOURce SWEep DWELI This command sets the dwell time for the current step sweep points Dwell time is used when IMMediate is the trigger source The dwell time is the amount of time the sweep is guaranteed to pause after setting the frequency and or power for the current point The setting enabled by this command is not affected by signal generator power on preset or RST The variable value is expressed in units of seconds default 1000 SWEep DELay SOURce SWEep DELay value SOURce SWEep DELay This command sets the off time for the current step sweep points Off time is used when IMMediate is t
8. This command enables or disables pulse modulation for the selected path RST 0 PULM MODE SOURce PULM MODE LIST SOURce PULM MODE This command sets the modulation mode With the normal ON OFF modulation can be performed With LIST an arbitrary bit pattern can be loaded that will be used to modulate the carrier LIST mode is available with pulse train option RST FIXed 52 BNC 5 17 SOURce ILS Subsystem This subsystem provides ILS glideslope and localizer signal generation It is only available to devices featuring the avionics modulations extension AVIO Command Parameters Unit default SOURce ILS GS STATe ON OFF 1 0 OFF SOURceJ ILS GS AMO DEPTh value 0 4 40 PCT SOURceJ ILS GS AMt1 DEPTh value 0 4 40 PCT SOURceJ ILS GS TEST DDMO UPIDOWN FLAG DDMO SOURce ILS LOCalizer STATe ON OFF 1 0 OFF SOURce ILS LOCalizer AMO DEPTh lt value gt 0 2 20 PCT SOURCce ILS LOCalizer AM1 DEPTh lt value gt 0 2 20 PCT SOURce ILS LOCalizer TEST DDMO LEFT RIGHT FLAG DDMO ILS GS STATe SOURce ILS GS STATe ON OFF 1 0 SOURce ILS GS STATe This command enables or disables the ILS glide slope modulation RST OFF ILS GS AMO DEPTh SOURceJ ILS GS AMO DEPTh lt value gt SOURCce ILS GS AMO DEPTh This command sets the 90 Hz glide slope amplitude modulation depth RST 0 4 ILS GS AM1 DEPTh SOURCce ILS GS
9. the signal generator Returned option strings are 0 Basic device B3 Rechargeable battery pack PE PE2 PE3 Extended power range AVIO ILS and VOR modulations GPIB GPIB IEEE 488 programming interface a 3 1 8 reg The Recall RCL command recalls the state from the specified memory register reg ej J nA e 3 1 9 RST The Reset RST command resets most signal generator functions to factory defined conditions Remarks Each command shows the RST default value if the setting is affected E 3 1 10 SAV lt reg gt The Save SAV command saves signal generator settings to the specified memory register lt reg gt Remarks The save function does not save all signal generator settings Refer to the User s Guide for more information on the save function SS a a i 3 1 11 SRE lt data gt The Service Request Enable SRE command sets the value of the Service Request Enable Register The variable lt data gt is the decimal sum of the bits that will be enabled Bit 6 value 64 is ignored and cannot be set by this command Range 0 255 The setting enabled by this command is not affected by signal generator preset or RST However cycling the signal generator power will reset it to zero 3 1 12 SRE The Service Request Enable SRE query returns the value of the Service Request Enable Register Range 0 63 amp 128 191 14 B
10. AM1 DEPTh lt value gt SOURCe ILS GS AM1 DEPTh This command sets the 150 Hz glide slope amplitude modulation depth RST 0 4 ILS GS TEST SOURce ILS GS TEST DDMO UP DOWN FLAG This command selects a predefined ILS glide slope test setting RST DDMO ILS LOC STATe SOURce ILS LOC STATe 10 33 BNC SOURce ILS LOC STATe This command enables or disables the ILS localizer modulation RST OFF ILS LOCalizer AMO DEPTh SOURce ILS LOCalizer AMO DEPTh lt value gt SOURCce ILS LOCalizer AMO DEPTh This command sets the 90 Hz localizer amplitude modulation depth RST 0 2 ILS LOCalizer AM1 DEPTh SOURceJ ILS LOCalizer AM1 DEPTh lt value gt SOURceJ ILS LOCalizer AM1 DEPTh This command sets the 150 Hz localizer amplitude modulation depth RST 0 2 QLS LOC TEST SOURce ILS LOC TEST DDMO LEFT RIGHT FLAG This command selects a predefined ILS localizer test setting RST DDMO 54 BNC 5 18 SOURce VOR Subsystem This subsystem provides VOR signal generation It is only available to devices featuring the avionics modulations extension AVIO Command Parameters Unit default SOURce VOR STATe ON OFF 1 0 OFF SOURce VOR BEARing lt value gt rad SOURce VOR TEST NORTh SOUTh EAST WEST 2 NORTh VOR STATe SOURce ILS GS STATe ON OFF 1 0 SOURce ILS GS STATe This command enables or disables the VOR modulation
11. different command system the semicolon is followed by a colon A colon at the beginning of a command marks the root node of the command tree If the successive commands belong to the same system having one or several levels in common the command line can be abbreviated To this end the second command after the semicolon starts with the level that lies below the common levels The colon following the semicolon must be omitted in this case Responses to Queries A query is defined for each setting command unless explicitly specified otherwise It is formed by adding a question mark to the associated setting command According to SCPI the responses to queries are partly subject to stricter rules than in standard IEEE 488 2 Parameters Most commands require a parameter to be specified The parameters must be separated from the header by a white space Permissible parameters are numerical values Boolean parameters text character strings and block data The type of parameter required for the respective command and the permissible range of values are specified in the command description Numerical values Numerical values can be entered in any form i e with sign decimal point and exponent Values exceeding the resolution of the instrument are rounded up or down The mantissa may comprise up to 255 characters the values must be in the value range 9 9E37 to 9 9E37 The exponent is introduced by an E or e Entry of the exponent
12. reset this register to zero sr 3 1 3 ESE The Standard Event Status Enable ESE query returns the value of the Standard Event Status Enable Register NOTE Reading the Standard Event Status Register clears it Remarks The Register is not affected by signal generator preset or However cycling the signal generator power will reset this register to zero 3 1 4 IDN The Identification IDN query outputs an identifying string The response will show the following information company name gt model numbers serial number gt firmware revision 3 1 5 The Operation Complete OPC command sets bit 0 in the Standard Event Status Register when all pending operations have finished The Operation Complete command causes the device to set the operation complete bit bit 0 in the Standard Event Status Register when all pending operations have been finished 3 1 6 Operation Complete OPC query returns the ASCII character 1 in the Standard Event Status Register when all pending operations have finished This query stops any new commands from being processed until the current processing is complete This command blocks the communication until a operations are complete i e the timeout setting should be longer than the longest sweep 13 BNC 3 1 7 The options OPT query returns a comma separated list of all currently installed instrument options on
13. the internal or external modulation source is used RST Normal PULM INTernal FREQuency SOURce PULM INTernal FREQuency frequency SOURce PULM INTernal FREQuency This command sets the pulse rate for the internally generated square wave using the variable lt frequency gt RST 400 Hz Range INT 0 1 2 100 kHz EXT 0 1 2 10 MHz PULM INTernal PERiod SOURce PULM INTernal PERiod period 51 BNC SOURce PULM INTernal PERiod This command sets the pulse period for the internally generated pulse modulation using the variables lt value gt If the entered value for the pulse period is equal to or less than the value for the pulse width the pulse width changes to a value that is less than the pulse period RST 2 5 ms Range 200 ns 10 s PULM INTernal PWIDth SOURce PULM INTernal PWIDth num SOURce PULM INTernal PWIDth This command sets the pulse width for the internally generated pulse signal This command sets the pulse width for the internally generated pulse modulation using the variable lt num gt If the entered value for the pulse width is equal to or greater than the value for the pulse period the pulse width changes to a value that is less than the pulse period RST 1 25 ms Range 50 nS to PERiod PULM SOURce SOURce PULM SOURce INTernal EXTernal BITStream SOURce PULM SOURce If set RST INTernal PULM STATe SOURce PULM STATe ON OFF 1 0 SOURce PULM STATe
14. values for LIST FREQuency This choice selects the chirp mode A chirp is quasi analog sweep over limited bandwidth Refer to the SSOURce CHIRp subsystem for configuration FREQuency STARt SOURce FREQuency STARt lt value gt lt unit gt SOURce FREQuency STARt This command sets the first frequency point in a chirp or step sweep RST The preset value is 1 GHz Please refer to the Data Sheet 25 BNC Range Please refer to the Data Sheet FREQuency STOP SOURce FREQuency STOP lt value gt lt unit gt SOURce FREQuency STOP This command sets the last frequency point in a chirp or step sweep RST The preset value is 2 GHz Range Please refer to the Data Sheet SOURce FREQuency STEP SOURce FREQuency STEP LINear This query returns the step sizein Hz for a linear step sweep SOURce FREQuency STEP LOGarithmic SOURce FREQuency STEP LOGarithmic This query returns the step size step factor for a logarithmic step sweep 5 5 SOURce CHIRp Subsystem The CHIRp Subsystem allows to run ultrafast quasi analog frequency sweeps The frequency can either increase or decrease linear Command Parameters Unit Remark default SOURce CHIRp TIME lt val gt 5 SOURce CHIRp COUNt INFinite val INF SOURce CHIRp DIR DU UD DOWN UP UP CHIRp COUNt SOURce CHIRp COUNt INF inite value SOURce CHIRp COUNt This command specifies the number of repetition
15. will be generated Range 1 3 501 LIST MODE SOURce LIST MODE AUTO MANual SOURce LIST MODE This command sets the operating mode for the current list or step sweep AUTO This choice enables the selected sweep type to perform a sweep of all points MANual This choice enables you to select a single sweep point The selected point controls the frequency and or amplitude according to the sweep type Refer to LIST MANual command for selecting a sweep point RST AUTO LIST POWer SOURce LIST POWer lt value gt lt value gt SOURCce LIST POWer This command sets the amplitude for the current list RAM points LIST POWer POINts SOURce LIST POWer POINts This command queries the number of power points in the current list sweep RAM LIST PROGgress SOURce LIST PROGgress This query returns the progress of an active list sweep 0 0 1 0 MEMory FILE LIST MEMory FILE LIST FIRSt LAST NEXT PREVious This query returns the file names of the available list files FIRSt and LAST return the first last list file name NEXT and PREVious return the file name of the next previous list This allows to enumerate all available list files After reaching the last or first list file NEXT or PREVious continue returning the names of the last or first list file 39 BNC MEMory FILE LIST DATA MEMory FILE LIST DATA lt filename gt lt data gt MEMory FILE LIST DATA lt gt command w
16. 0 0 0 0 If you have a gateway then the default gateway would be set to the appropriate value of your gateway MAC Address A MAC address is a unique 48 bit value that identifies a network interface card to the rest of the network Every network card has a unique MAC address permanently stored into its memory Interface between the instrument and other devices on the network is connected to a network via a category five CAT 5 interface cable This cable uses four twisted pairs of copper insulators terminated into an RJ45 connector CAT 5 cabling is capable of supporting frequencies up to 100 MHz and data transfer speeds up to 1 Gbps which accommodates 1000Base T 100Base T and 10Base T networks Generally a VISA I O library like NI VISA is used on the server side to facilitate the communications A VISA installation on the controller is a prerequisite for remote control over LAN interface VISA is a standardized software interface library providing input and output functions to communicate with instruments For more information about VISA refer to the VISA library supplier s documentation Only the IP address or the device name is required for link setup The IP address device name is part of the visa resource string used by the programs for identification and control of the instrument The visa resource string has the form TCPIP ipaddr inst0 INSTR ipaddr has to be replaced by the IP address or the computer name of the in
17. 1 0 Turns RF output power on off BLANking STATe 1 0 OUTPut BLANking STATe ON OFF 1 0 OUTPut BLANking STATe ON causes the RF output to be turned off blanked during frequency changes OFF leaves RF output turned on unblanked BNC 54 SOURce FREQuency Subsystem Command Parameters Unit Remark default SOURce FREQuency FlXed CW fmin to fmax Hz SOURce FREQuency MODE FIX CW SWEep LIST FIXed CHIR SOURce FREQuency STARt fmin to fmax Hz SOURce F REQuency STOP fmin to fmax Hz SOURce FREQuency STEP LINear Hz SOURce FREQuency STEP LOGarithmic FREQuency CW SOURce FREQuency CW lt value gt lt unit gt SOURce FREQuency CW This command sets the signal generator output frequency for the CW frequency mode RST 100 MHz Range Please refer to the Data Sheet FREQuency MODE SOURce F REQuency MODE FIX CW SWEep LIST CHIRp SOURce F REQuency MODE This command sets the frequency mode of the signal generator to CW list sweep or chirp FIX CW Stops a frequency sweep or chirp SWEep or LIST This choice selects the swept frequency mode If sweep triggering is set to immediate along with continuous sweep mode executing the command starts the LIST or SWEep frequency sweep In SWEep mode frequency will be determined by programmed values for the STARt and STOP FREQuency subsystem commands In LIST mode frequency is determined by programmed
18. 1 10 BSA V M 3 1 11 gudicobo EE M 3 1 12 TSRE esee ritieni 3 1 13 3 1 14 3 1 15 3 1 16 BVA MP 15 4 xe d celt ni 16 INTRODUCTION RR 16 4 2 cT 16 4 3 SCPICOMMANDISYNTAX cett aeui dana veces en en asan Esia UR NEE 17 4 4 HIERARCHICAL COMMAND STRUCTURE rini riri ri si si sa 18 4 5 STATUS SYSTEM PROGRAMIING 2 sii reni n xd ren yo ya vea e rug ea Eg N i EEEE a SEEE E aE 4 6 STATUS Esri 4 7 STATUS GROUP REPORTING 4 8 STANDARD EVENT STATUS GROUP 4 9 QPERATION STATUS GROUP 4 10 QUESTIONABLE STATUS GROUP 2c olent cesta du anita eek o us anas dedsandacdancassdessenaceesseasddedscndeddancassaescentinens 21 5 SCPI COMMAND 5 22 5 1 lt SABORT SUBSYSTEM iini eerie enenc neues airs a a ASAE 22 5 2 SINITIAT
19. BNC 7 BNC Programmer s Manual V1 4 Signal Generator Models BENCHTOP MICROWAVE SOURCE COMPACT SIGNAL GENERATOR COMPACT SYNTHESIZER BNC WARRANTY Berkeley Nucleonics Corporation warrants all instruments including component parts to be free from defects in material and workmanship under normal use and service for a period of one year If repairs are required during the warranty period contact the factory for component replacement or shipping instructions Include the serial number of the instrument This warranty is void if the unit is repaired or altered by others than those authorized by Berkeley Nucleonics Corporation IMPORTANT PLEASE READ CAREFULLY NOTIFICATION OF COPYRIGHT THE FIRMWARE IN THIS DEVICE IS PROTECTED BY COPYRIGHT LAWS AND INTERNATIONAL TREATY YOU MUST TREAT THE FIRMWARE LIKE ANY OTHER COPYRIGHTED MATERIAL COPYRIGHT LAWS PROHIBIT MAKING ADDITIONAL COPIES OF THE FIRMWARE FOR ANY REASON OTHER THAN SPECIFICALLY DESCRIBED IN THE LICENSE BELOW YOU MAY NOT COPY THE WRITTEN MATERIALS ACCOMPANYING THE PRODUCT BNC Table of Contents MflMe 2 TABLE OF CONTENTS ive e 3 1 i oiileiisio Y 5 2 PROGRAMMING THE INSTRUMENT 6 221 ETHERNET LAN oh
20. E SUBSYSTEM svineriet exo ceo dutondeebaesdaddbetonscsestssenecntoncuetwes dnddbsetesueoatanauedsoanceataeadaddostensuaestaravedssansenaa 23 5 3 2S OUTPUT SUBSYSTEM xor esos tie redeant cub qe e eee nd e ade ee 24 5 4 SOURCE FREQUENCY SUBSYSTEM ssssssccecccscsesesseececeeseeesesecececsesneeesesececeeseeaeseeeeeceesneaeeeeeesceeseeaeaeeeeeeeeees 25 5 5 SOURCE CHIRP SUBSYSTEM ss o SR eR pna Ra ea sabes ERE RARE AN Eo ERE LEVER ERE AR Rea stan 26 5 6 5 7 5 8 5 9 5 10 5 11 5 12 5 13 5 14 5 15 5 16 5 17 5 18 5 19 5 20 5 21 5 22 5 23 SOURCE PHASE SUBSYSTEM SOURCE POWER SUBSYSTEM SOURCE CORRECTION SUBSYSTEM SOURCE ROSCILLATOR SUBSYSTEM SOURCE LIST SUBSYSTEM SOURCE LFOUTPUT SUBSYSTEM SOURCE SWEEP SUBsYSTEM SOURCE AM SUBSYSTEM AMPLITUDE MODULATION SOURCE FM SUBSYSTEM FREQUENCY MODULATION SOURCE PM SUBSYSTEM PHASE 10 0 2000 000 nennen nennen nnns nnns etna nasse nnns SOURCE PULM SUBSYSTEM PULSE MODULATION esee eene rennen nnne nnne nnne nn nane nnns SOURCE ILS SUBSYSTEM SOURCE VOR SUBSYSTEM TRIGGER 50 5 STATUS SUBSYSTEM 5 5 0 5
21. NC 3 1 13 STB The Read Status Byte STB query returns the value of the status byte including the master summary status MSS bit Range 0 255 3 1 14 TRG The Trigger TRG command triggers the device if LAN is the selected trigger source otherwise TRG is ignored 3 1 15 TST The Self Test TST query initiates the internal self test and returns one of the following results 0 This shows that all tests passed 1 This shows that one or more tests failed 3 1 16 The Wait to Continue WAI command causes the signal generator to wait until all pending commands are completed before executing any other commands 15 4 SCPI Commands This chapter provides an introduction to SCPI programming that includes descriptions of the command types hierarchical command structure data parameters and notational conventions Information on BENCHTOP MICROWAVE SOURCE status system and trigger system programming is also provided 41 Introduction Standard Commands for Programmable Instruments is the new instrument command language for controlling instruments that goes beyond EEE 488 2 to address a wide variety of instrument functions in a standard manner SCPI promotes consistency from the remote programming standpoint between instruments of the same class and between instruments with the same functional capability For a given measurement function such as frequency or voltage SCPI defines the specific co
22. Output SHAPe SINE TRlangle SQUare SOURce LFOutput SHAPe This command sets the low frequency generator waveform This setting does only take effect if LFOutput SOURCce is set to LFGenerator 41 SINE Sine wave output amplitude is selectable by the LFOutput AMPLitude setting TRlangle Triangle wave output amplitude is selectable by the _FOutput AMPLitude setting SQUare Square wave output amplitude is fixed 2 5 V RST SINE LFOutput SOURce SOURce LFOutput SOURce LFGenerator PULM TRIGger SOURce LFOutput SOURce This command sets the low frequency generator waveform This setting does only take effect if LFOutput SOURCe is set to LFGenerator LFGenerator This selects the low frequency generator as the function output signal PULM This selects the pulse modulation video out as the function output signal TRIGger This selects the trigger as the function output signal RST LFG 42 BNC 5 12 SOURce SWEep Subsystem Command Parameters Unit default Remark SOURce SWEep COUNt INFinite lt value gt INFinite SOURce SWEep DIRection UP DOWN RANDom UP SOURce SWEep POINts 2 to 65535 SOURce SWEep DWELI value S SOURce SWEep DELay lt value gt 5 SOURce SWEep DELay AUTO 1 0 SOURce SWEep PROGress SOURce SWEep SPACing LINear LOGarithmic SOURce FREQuency MODE FIXed CW SWEep LIST SOURce F REQuency STARt fmin to fmax Hz
23. Rce AM STATe ON OFF 1 0 SOURce AM INTernal F REQuency lt value gt 400 Hz SOURce AM SOURce INTernal EXTernal AM DEPTh SOURce AM DEPTh value SOURce AM DEPTh This command sets the amplitude modulation depth O 1 RST 0 8 Range 0 0 99 AM INT FREQuency SOURce AM INTernal F REQuency value unit UPIDOWN SOURce AM INTernal FREQuency This command sets the internal amplitude modulation rate RST 400 Hz Range 10 Hz to 50 000 Hz The RF carrier is modulated when you have set the signal generator s AM modulation state to ON Whenever amplitude modulation is enabled the AM on is in the display 46 BNC 5 14 SOURce FM Subsystem Frequency Modulation Command Parameters Unit default SOURce FM DEViation lt value gt 1000 Hz SOURce FM SENSitivity lt value gt 1000 Hz V SOURce FM INT FREQuency value 400 Hz SOURce FM INTernal SHAPe RD RU SINE SQUare TRlangle SINE SOURce FM SOURce INTernal EXTernal EXT SOURce FM STATe ON OFF 1 0 OFF SOURce FM COUPling DC AC AC FM DEViation SOURce FM SENSitivity value SOURce FM SENSitivity This command sets the frequency modulation deviation This setting will be used if FM SOURcCe is set to LFGenerator The variable value is expressed in units of Hertz RST 1000 FM SENSitivity SOURce FM SENSitivity value SOURCce FM SENSitivity This command sets the frequency modu
24. a to a file named by the FLATness STORe command CORRection FLATness STORe command The directory path is implied in the command and need not be specified in the file name gt variable 34 BNC 59 SOURce ROSCillator Subsystem Command Parameters Unit Remark default SOURce ROSCillator EXTernal F REQuency lt val gt 10 MHz SOURce ROSCillator _LOCKed SOURce ROSCillator OUTPut STATe 1 0 OFF SOURce ROSCillator SOURce INTernal INT EXTernal SLAVe SOURce ROSCillator INTernal TUNing a NA SOURce ROSCillator OUTPut FREQuency a 10MHz EXTernal FREQuency SOURce ROSCillator EXTernal F REQuency val SOURce ROSCillator EXTernal F REQuency This command conveys the expected reference frequency value of an externally applied reference the signal generator The variable lt val gt is expressed in units of MHz RST 10 MHz Range 1 to 250 MHz LOCKed SOURce ROSCillator LOCKed This command queries if the synthesizer is locked to the externally applied reference OUTPut STATe SOURce ROSCillator OUTPut STATe 10 SOURce ROSCillator OUTPut STATe This command enables or disables the 10 frequency reference output RST OFF SOURce SOURce ROSCillator SOURce INT EXT SLAVe This command selects either an internal or external reference for the waveform clock Slave mode uses a 100 MHz external reference directly Slave
25. alone is not allowed 17 BNC Units In the case of physical quantities the unit can be entered Permissible unit prefixes are giga MA mega MHZ are also permissible K kilo M milli U micro and N nano If the unit is missing the basic unit is used Boolean Parameters Boolean parameters represent two states The ON state logically true is represented by ON or a numerical value unequal to 0 The OFF state logically false is represented by OFF or the numerical value 0 ON or OFF is returned by a query ee ee s J A 4 4 Hierarchical Command Structure All SCPI commands except the common commands are organized in a hierarchical structure similar to the inverted tree file structure used in most computers The SCPI standard refers to this structure as Command Tree The command keywords that correspond to the major instrument control functions are located at the top of the command tree The command keywords for the BENCHTOP MICROWAVE SOURCE SCPI command set are shown below ABORt DIAGnostic DISPlay INITiate OUTput SOURce STATus SYSTem TRIGger UNIT All BENCHTOP MICROWAVE SOURCE SCPI commands except the ABORt command have one or more subcommands keywords associated with them to further define the instrument function to be controlled The subcommand keywords may also have one or more associated subcommands keywords Each subcommand level adds another layer to the command tree The comma
26. criptive text This query clears the instrument s error queue PRESet SYSTem PRESet Resets most signal generator functions to factory defined conditions This command is similar to the RST command VERSion SYSTem VERSion Returns the SCPI version number that the instrument software complies with 1999 0 LOCK SYSTem LOCK Locks disables front panel control LOCK RELease 61 SYSTem LOCK RELease Unlocks enables front panel control 62 BNC 5 22 SYSTem COMMunicate Subsystem Command Parameters Unit default SYSTem COMMunicate LAN CONFig DHCP MANual AUTO DHCP SYSTem COMMunicate LAN DEFaults SYSTem COMMunicate LAN GATeway ipstring 0 0 0 0 SYSTem COMMunicate LAN IP lt ipstring gt SYSTem COMMunicate LAN RESTart SYSTem COMMunicate LAN SUBNet ipstring 255 255 255 0 LAN CONFig SYSTem COMMunicate LAN CONFig DHCP MANual AUTO SYSTem COMMunicate LAN CONFig This command sets the signal generator s internet protocol IP address MANual The user assigns an IP address to the signal generator DHCP The network assigns an IP address to the signal generator If DHCP fails manual configuration will be used AUTO The network assigns an IP address to the signal generator with a fallback to Auto IP if DHCP fails If both DHCP and Auto IP fail manual configuration will be used LAN DEFaults SYSTem COMMunicate LAN DEFaults This command res
27. e Multiple Access Collision Detection This standard enables network devices to detect simultaneous data channel usage called a collision and provides for a contention protocol When a network device ON BNC detects a collision the CSMA CD standard dictates that the data will be retransmitted after waiting a random amount of time If a second collision is detected the data is again retransmitted after waiting twice as long This is known as exponential back off The TCP IP setup requires the following Address Every computer electronic device in a TCP IP network requires an IP address An IP address has four numbers each between 0 and 255 separated by periods For example 192 168 1 50 is a valid IP address Subnet Mask The subnet mask distinguishes the portion of the IP address that is the network ID from the portion that is the station ID The subnet mask 255 255 0 0 when applied to the IP address given above would identify the network ID as 192 168 and the station ID as 1 50 All stations in the same local area network should have the same network ID but different station IDs Default Gateway A TCP IP network can have a gateway to communicate beyond the LAN identified by the network ID A gateway is a computer or electronic device that is connected to two different networks and can move TCP IP data from one network to the other A single LAN that is not connected to other LANs requires a default gateway setting of
28. e polarity selection state The active state can be set high or low The gate mode works only with an external trigger source POINt Upon triggering only a single point of the sweep list is played RST NORM TRIGger SEQuence SOURce TRIGger SEQuence SOURce IMMediate KEY EXTernal BUS TRIGger SEQuence SOURce This command sets the trigger source IMMediate No waiting for a trigger event occurrs KEY This choice enables manual triggering by pressing the front panel RFon off EXTernal This choice enables the triggering of a sweep event by an externally applied signal at the MOD IN connector BUS This choice enables triggering over the LAN using the TRG or GET commands RST IMM TRIGger SEQuence DELay TRIGger SEQuence DELay value TRIGger SEQuence DELay This command sets the amount of time to delay the BENCHTOP MICROWAVE SOURCE response to an external trigger The delay is a path time delay between when the BENCHTOP MICROWAVE SOURCE receives the trigger and when it responds to the trigger The delay does not occur until you turn it on You can set the delay value either before or after turning it on TRIGger SEQuence SLOPe TRIGger SEQuence SLOPe POSitive NEGative NP PN TRIGger SEQuence EXTernal SLOPe This command sets the polarity for an external trigger signal while using the continuous single triggering mode The POSitive and NEGative selections correspond to the high positive and low negative
29. e query returns the currently selected mode RST INT FLATness PAIR SOURce CORRection FLATness PAIR lt freq gt lt freq suffix gt lt corr gt lt corr suffix gt SOURce CORRection FLATness PAIR point This command form adds or changes a frequency and amplitude correction pair The maximum number of points that can be entered is 3201 The query form returns the frequency and amplitude correction pair at the given point index The index ranges from 0 to the number of points minus 1 Range Frequency range varies and is model dependent Please refer to the instrument s Data Sheet FLATness POINts SOURce CORRection FLATness POINts This query returns the number of points in the user flatness correction file FLATness PRESet SOURce CORRection FLATness PRESet 32 BNC This command presets the user flatness correction to a factory defined setting that consists of one point CAUTION The current correction data will be overwritten once this command is executed Save the current data if needed Refer to FLATness STORe command for storing user flatness files FLATness STATe SOURce CORRection FLATness STATe ON OFF 1 0 SOURce CORRection FLATness STATe This command enables or disables the user flatness corrections RST 0 MEMory FILE CORRection FLATness DATA MEMory FILE CORRection FLATness DATA lt filename gt lt data gt MEMory FILE CORRection FLATness DATA lt
30. ed an internal modulation source is applied If EXTernal is selected the device s input at the rear p RST EXT PM STATe SOURce PM STATe ON OFF 1 0 SOURce PM STATe This command turns the phase modulation on or off RST OFF 50 BNC 5 16 SOURce PULM Subsystem Pulse Modulation This additional functionality provides pulse modulation of the RF output signal delivered to the load by an internal or external modulation signal The INTernal selection accesses the internally generated modulation input while EXTernal selects the external pulse rear panel connector input Command Parameters Unit default SOURce PULM POLariy 0000001 NORMal INVerted NORMal SOURce PULM INTernal F REQuency lt frequency gt Hz SOURce PULM INTernal PERiod lt period gt 5 SOURce PULM INTernal PWIDth lt num gt 5 SOURce PULM SOURce INTernal EXTernal Bl INT TStream SOURce PULM STATe 1 0 SOURce PULM MODE FIXed LIST FIXed SOURce PULM BITStream lt hex data gt 5h SOURce PULM BITStream BITS lt value gt 4 SOURce PULM BITStream DIRection MSBFirst LSBFirst MSBFirst SOURce PULM BITStream RATE lt frequency gt Hz SOURce PULM BITStream STARtbit value 0 SOURce PULM BITStream TIME lt time gt 5 PULM POLarity SOURce PULM POLarity NORMal INVerted SOURce PULM POLarity This command selects the polarity of the pulse modulation regardless if
31. escription 5 1 ABORt Subsystem The ABORt command is a single command subsystem There no subcommands or associated data parameters as shown below The ABORt command along with the TRIGger and INITiate commands comprise the Trigger group of commands Command Parameters Unit Remark default ABORI ABORtI ABORI This command causes the List or Step sweep in progress to abort Even if INIT CONT ALL is set to ON the sweep will not immediately re initiate I hl AU UXh ED UEEEUXU LUOCO UOARERAUAaAABEMEBREEK KEAEMEMEMXE EE EEEIEEEE OOOO 7O t Y 22 BNC 5 2 INITiate Subsystem The INITiate subsystem controls the state of the BENCHTOP MICROWAVE SOURCE trigger system The subsystem commands and parameters are described below The INITiate commands along with the ABORt and TRIGger commands comprise the Trigger Group of commands Command Parameters Unit Remark default INITiate IMMediate ON INITiate CONTinuous 1 0 INITiate IMMediate Sets trigger to the armed state INITiate CONTinuous ON OFF 1 0 Continuously rearms the trigger system after completion of a triggered sweep 23 BNC 5 3 OUTPut Subsystem Command Parameters Unit Remark default OUTPut STATe 1 0 OFF OUTPut BLANking STATe 0 OFF STATe ON OFF 1 0 OUTPut STATe ON OFF
32. for the driver which in this case is NI VISA If NI VISA is properly installed the device will be installed as a USB Test amp Measurement Class Device Open Measurement amp Automation Explorer MAX The new device will appear in MAX under Device and Interfaces USB Devices You can then use this resource name as you would use any GPIB resource 2 22 05 Interface Connection and Setup using Berkeley Nucleonics Berkeley Nucleonics API programming interface supports direct communication to instruments using Berkeley Nucleonics s proprietary DLL driver libraries Please contact Berkeley Nucleonics for more detailed documentation programming samples and updates on the DLL library a 2 3 GPIB Interface Connection and Setup 2 31 General GPIB information GPIB General Purpose Interface Bus is an interface standard for connecting computers and peripherals which supports the following international standards IEEE 488 1 IEC 625 IEEE 488 2 and JIS C1901 The GPIB interface allows you to control the APPH from an external computer The computer sends commands and instructions to the APPH and receives data sent from the APPH via GPIB You can connect up to 15 devices in a single GPIB system The length of cables to connect between devices must be 4 m or less The total length of connecting cables in a single GPIB system must be 2 m x the number of connected devices including the controller or less You cannot construc
33. gramming the signal generator The NI BNC VISA and Agilent VISA libraries are similar implementations of VISA and have the same commands syntax and functions 2 1 4 Using Telnet LAN Port 18 Telnet provides a means of communicating with the signal generator over the LAN The Telnet client run on a LAN connected computer will create a login session on the signal generator A connection established between computer and signal generator generates a user interface display screen with prompts on the command line Using the Telnet protocol to send commands to the signal generator is similar to communicating with the signal generator over LAN You establish a connection with the signal generator and then send or receive information using predefined commands Communication is interactive one command at a time The telnet service is available on port 18 Once a telnet session to the device is established the echo can be enabled by typing SYST COMM SOCK ECHO ON Following this command a prompt gt gt should become visible 2 2 USB USBTMC All instruments support the following USB interface protocols 1 USBTMC class device via VISA USBTMC stands for USB Test amp Measurement Class USBTMC is a protocol built on top of USB that allows GPIB like communication with USB devices From the user s point of view the USB device behaves just like a GPIB device USBTMC allows instrument manufacturers to upgrade the physical layer f
34. hat the trigger output must be enabled by sending the SOURce LFOutput SOURce TRIGger command RST NORM 58 BNC 5 20 STATus Subsystem This subsystem controls the status reporting structures Command Parameters Unit Remark default STATus OPERation EVENt STATus OPERation CONDition STATus OPERation ENABle lt value gt STATus OPERation PTR value STATus OPERation NTR value STATus PREset STATus QUEStionable EVENt STATus QUEStionable CONDition STATus QUEStionable ENABle value STATus QUEStionable PTR value STATus QUEStionable NTR value OPERation STATus OPERation EVENt This query returns the contents of the operation status event register and clears it OPERation CONDition STATus OPERation CONDition This query returns the contents of the operation status condition register OPERation ENABIe STATus OPERation ENABle This command sets the enable mask of the operation status event register OPERation PTR STATus OPERation PTR This command sets the positive transition filter of the operation status event register OPERation NTR STATus OPERation NTR This command sets the negative transition filter of the operation status event register PRESet STATus PRESet Disables all status events clears all negative transition filters and sets all positive transition filters 39 BNC QUEStionable STATu
35. he trigger source The off time is the amount of time the sweep is guaranteed to pause after setting the frequency and or power for the current point The setting enabled by this command is not affected by signal generator power on preset or RST The variable lt value gt is expressed in units of seconds default 300 SWEep PROGgress SOURce SWEep PROGgress This query returns the progress of an active sweep 0 0 1 0 SWEep SPACing SOURce SWEep SPACing LOGarithmic SOURce SWEep SPACing This command enables the signal generator linear or logarithmic sweep modes These commands require the signal generator to be in step mode The instrument uses the specified start frequency stop frequency and number of points for both linear and log sweeps RST LIN STARt SOURce POWer STARt lt value gt lt unit gt SOURce POWer STARt This command sets the first amplitude point in a step sweep RST Range Refer to LEVel IMMediate AMPLitude command for the output power ranges STOP SOURce POWer STOP lt value gt lt unit gt SOURce POWer STOP This command sets the last amplitude point in a step sweep RST 44 Range Refer to LEVel IMMediate AMPLitude command for the output power ranges 45 BNC 5 13 SOURce AM Subsystem Amplitude Modulation Command Parameters Unit default SOURce AM DEPTh lt value gt 0 8 80 PCT SOU
36. ined in the IEEE 802 2 standard All instruments support the following LAN interface protocols e Socket based LAN The application programming interface API provided with the instrument supports general programming using the LAN interface under Windows operating System VXI 11 Telephone Network TELNET TELNET is used for interactive one command at a time instrument control e Internet protocol optionally supported For LAN operation the signal generator must be connected to the LAN and an IP address must be assigned to the signal generator either manually or by using DHCP client service Your system administrator can tell you which method to use Most current LAN networks use DHCP DHCP Configuration If the DHCP server uses dynamic DNS to link the hostname with the assigned IP address the hostname may be used in place of the IP address Otherwise the hostname is not usable 2 1 4 Ethernet Interface Connection and Setup The instrument fully supports the IEEE 802 3 standard Most front panel functions except power on off can be remotely controlled via a network server and an Ethernet connection The instrument firmware supports the TCP IP network protocol Ethernet uses a bus or star topologies where all of the interfacing devices are connected to a central cable called the bus or are connected to a hub Ethernet uses the CSMA CD access method to handle simultaneous transmissions over the bus CSMA CD stands for Carrier Sens
37. lation deviation per one volt peak amplitude signal input This setting will be used if FM SOURce is set to EXTernal The variable value is expressed in units of Hertz per Volt RST 1000 FM INT FREQuency SOURce FM INT FREQuency value SOURce FM INT FREQuency This command sets the frequency modulation rate in Hz This setting will be used if FM SOURce is set to INTernal The variable value is expressed in Hertz RST 400 FM INT SHAPe SOURce FM INT SHAPe RD RU SINE SQUare TRlangle SOURce FM INT SHAPe 47 This command specifies the FM modulation shape RD selects Ramp Down and RU ramp up Standard waveforms available are SINE SQUare and TRlangle FM SOURce SOURce FM SOURce EXTernal INTernal SOURce FM SOURce This command selects the FM modulation signal source If INTernal is selected an internal modulation source is applied If EXTernal is selected the device s LIM input at the rear p RST EXT FM STATe SOURce FM STATe ON OFF 1 0 SOURce FM STATe This command turns the frequency modulation on or off RST OFF FM COUPling SOURce FM COUPling DC AC SOURce FM COUPIling This command selects to signal coupling for the external FM modulation RST AC 48 BNC 5 15 SOURce PM Subsystem Phase Modulation Command Parameters Unit default SOURce PM DE Viation lt value gt 2 4048 rad SOURce PM SENSitivity l
38. level starts stops sweep Setting the waveform s response to triggers 1 CONTinuous repeatedly accepts trigger events 2 SINGle uses only one trigger event 3 Selecting the trigger source which determines how the BENCHTOP MICROWAVE SOURCEX000 receives its trigger signal internally or externally The GATE choice requires an external trigger Setting the trigger polarity when using an external source Command Parameters Unit Remark default TRIGger SEQuence TYPE NORMal GATE POINt N A TRIGger SEQuence SOURce IMMediate KEY EXT BUS IMM TRIGger SEQuence DELay lt value gt Os TRIGger SEQuence SLOPe POSitive NEGative NP PN POS TRIGger SEQuence ECOunt lt value gt 1 TRIGGer OUTPut POLarity NORMaI INVerted NORM TRIGGer OUTPut MODE NORMal GATE POINt NORM TRIGger TYPE 56 BNC TRIGger SEQuence TYPE NORMal GATE POINT TRIGger SEQuence T YPE This command sets the trigger type that controls the waveform s playback The following list describes the trigger type command choices NORMal Upon triggering the waveform sequence plays according to settlings defined by INITiate CONTinuous only once or repeatedly GATE An external trigger signal repeatedly starts and stops the waveform s playback The time duration for playback depends on the duty period of the trigger signal and the gate polarity selection The waveform plays during the inactive state and stops during the activ
39. mmand set that is available for that function Thus two oscilloscopes made by different manufacturers could be used to make frequency measurements in the same way It is also possible for a SCPI counter to make a frequency measurement using the same commands as an oscilloscope SCPI commands are easy to learn self explanatory and account for both novice and expert programmer s usage Once familiar with the organization and structure of SCPI considerable efficiency gains can be achieved during control program development independent of the control program language selected A key to consistent programming is the reduction of multiple ways to control similar instrument functions The philosophy of SCPI is for the same instrument functions to be controlled by the same SCPI commands To simplify learning SCPI uses industry standard names and terms that are manufacturer and customer supported The advantage of SCPI for the ATE system programmer is reducing the time learning how to program new SCPI instruments after programming their first SCPI instrument Programmers who use programming languages such as BASIC C FORTRAN etc to send instrument commands to instruments will benefit from SCPI Also programmers who implement instrument device drivers for ATE program generators and or software instrument front panels will benefit by SCPI s advantages SCPI defines instrument commands parameters data and status It is not an application package p
40. mode is intended to use another BENCHTOP MICROWAVE SOURCE device s reference reference output setting 100 MHz RST INT 35 BNC OUTPut FREQuency SOURce ROSC OUTPut F REQuency value unit SOURce ROSC OUTPut FREQuency This command selects the reference output frequency Only 10 MHz or 100 MHz can be set 36 BNC 5 10 SOURce LIST Subsystem Command Parameters Unit Remark default SOURce LIST COUNt INFinite lt value gt INFinite SOURce LIST DIRection UP DOWN RANDom UP SOURce LIST DWELI lt value gt 5 SOURce LIST DELay lt value gt 5 SOURce LIST DELay AUTO ON OFF 1 0 ON SOURce LIST FREQuency POINts SOURce LIST FREQuency lt value gt lt value gt Hz SOURce LIST MANual lt value gt UP DOWN SOURce LIST MODE AUTO MANual SOURce LIST POWer lt value gt lt value gt dBm SOURce LIST POWer POINts SOURCce LIST PROGress MEMory FILE LIST FIRSt LAST NEXT PREVious MEMory FILE LIST DATA filename 2 data MEMory FILE LIST DELete lt gt MEMory FILE LIST LOAD filename MEMory FILE LIST STORe filename LIST COUNt INFinite value SOURce LIST COUNt INFinite value SOURce LIST COUNt This command sets the number of list repetitions being played after triggering a list sweep If set to INFinite the list sweep will be repeated until
41. n enabling the list mode MEMory FILE LIST STORe MEMory FILE LIST STORe lt filename gt This command stores the current list RAM data in a list file 40 BNC 511 SOURce LFOutput Subsystem Command Parameters Unit default SOURce LFOutput AMPLitude lt value gt 1V SOURce LFOutput F REQuency lt value gt 400 Hz SOURce LFOutput STATe ON OFF 1 0 OFF SOURce LFOutput SHAPe SINE TRlangle SQUare SINE SOURCce LFOutput SOURce LFGenerator PULM TRIGger LFG LFOutput AMPLitude SOURce LFOutput AMPLitude lt value gt SOURce LFOutput AMPLitude This command sets the low frequency generator amplitude This setting does only take effect if LFOutput SOURCce is set to LFGenerator and LFOutput SHAPe is either set to SINE or TRlangle Using any other setting the output amplitude is fixed 2 5 V The variable lt value gt is expressed in units of Volt Range 0 2 5 RST 1 LFOutput FREQuency SOURce LFOutput F REQuency lt value gt SOURCce LFOutput F REQuency This command sets the low frequency generator frequency This setting does only take effect if LFOutput SOURCce is set to LFGenerator The variable lt value gt is expressed in units of Hertz Range 10 5000000 RST 400 LFOutput STATe SOURce LFOutput STATe ON OFF 1 0 SOURce LFOutput STATe This command sets the function output low frequency generator state RST OFF LFOutput SHAPe SOURce LF
42. nd keyword and its associated subcommand keywords form a portion of the command tree called a command subsystem CE o X 4 5 Status System Programming The BENCHTOP MICROWAVE SOURCE implements the status byte register the Service Request Enable Register the Standard Event Status Register and the Standard Event Status Enable Register The BENCHTOP MICROWAVE SOURCE status system consists of the following SCPI defined status reporting structures 18 BNC e The Instrument Summary Status Byte e The Standard Event Status Group e The Operation Status Group e The Questionable Status Group The following paragraphs describe the registers that make up a status group and explain the status information that each status group provides M 4 6 Status Registers In general a status group consists of a condition register a transition filter an event register and an enable register Each component is briefly described in the following paragraphs Condition Register The condition register is continuously updated to reflect the current status of the BENCHTOP MICROWAVE SOURCE There is no latching or buffering for this register it is updated in real time Reading the contents of a condition register does not change its contents Transition Filter The transition filter is a special register that specifies which types of bit
43. nerator power on preset or RST The variable value is expressed in units of seconds LIST DELay AUTO SOURce LIST DELay AUTO ON OFF 1 0 This command enabled the automatic blanking of the output during transients between two frequency steps RST ON LIST FREQency POINts SOURCce LIST POINts This command queries the signal generator for the number of frequency points in the current list sweep RAM LIST FREQuency SOURceJ LIST FREQuency lt value gt lt value gt SOURce LIST FREQuency This command sets the frequency values for the current list sweep points The maximum number of list sweep points is 3501 The variable value is expressed in units of Hertz The setting enabled by this command is not affected by signal generator power on preset or RST Range Please consult the Data Sheet 38 BNC LIST MANual SOURce LIST MANual value UP DOWN SOURce LIST MANual This command sets a list or step sweep point as the current sweep point controlling the frequency and power output If list or step mode is controlling frequency or power or both then the indexed point in the respective list s will be used Entering a value with this command will have no effect unless MANual is the selected mode Refer to LIST MODE command for setting the proper mode If the point selected is beyond the length of the longest enabled list then the point will be set to the maximum possible point and an error
44. nuation AUTO 1 0 ON SOURce POWer AT Tenuation LIST LEVel IMMediate AMPLitude SOURce POW er LEVel IMMediate AMPLitude value unit SOURce POWer LEVel I MMediate AMPL itude This command sets the RF output power MODE SOURce POWer MODE CWILIST SW Eep SOURce POWer MODE This command sets the signal generator power mode to fixed or swept FIX This choice stops a power sweep allowing the signal generator to operate at a fixed power level Refer to LEVel IMMediate AMPLitude command for setting the output power level LIST or SWEep This choice selects the swept power mode If sweep triggering is set to immediate along with continuous sweep mode executing the command starts the LIST or STEP power sweep STARt SOURce POWer STARt lt value gt lt unit gt SOURce POWer STARt This command sets the first amplitude point in a step sweep Range STOP 29 BNC SOURce POWer STOP lt value gt lt unit gt SOURce POWer STOP This command sets the last amplitude point in a step sweep Range STEP SOURce POWer STEP LINear This query returns the step size in dB for a linear step sweep ALC SOURce POWer ALC ON OFF 1 0 SOURce POWer ALC This command turns the automatic power level control on and off RST The preset value is 1 ALC LOWN SOURce POWer ALC LOWN ON OFF 110 SOURce POWer ALC LOWN This command enables or disables
45. ompleted following execution of the command 1 Request control 2 Set to indicate that a query error has occurred Query errors have SCPI error codes from 499 to 400 3 Set to indicate that a device dependent error has occurred Device dependent errors have SCPI error codes from 399 to 300 and 1 to 32767 4 Set to indicate that an execution error has occurred Execution errors have SCPI error codes from 299 to 200 5 Set to indicate that a command error has occurred Command errors have SCPI error codes from 199 to 100 6 User request 7 Power on Standard Event Status Enable register ESE commands 20 4 9 Operation Status Group The Operation Status group consisting of the Operation Condition register the Operation Positive Transition register the Operation Negative Transition register the Operation Event register and the Operation Event Enable register is used to determine the specific condition that set bit 7 in the Summary Status Byte The bits in the Operation Event register provide the following 4 10 Questionable Status Group The Questionable Status group consisting of the Questionable Condition register the Questionable Positive Transition register the Questionable Negative Transition register the Questionable Event register and the Questionable Event Enable register is used to determine the specific condition that set bit 3 in the Summary Status Byte 5 SCPI Command D
46. oup Reporting The state of certain BENCHTOP MICROWAVE SOURCE hardware and operational events and conditions can be determined by programming the status system Three lower status groups provide status information to the Summary Status Byte group The Summary Status Byte group is used to determine the general nature of an event or condition and the other status groups are used to determine the specific nature of the event or condition Summary Status Byte Group The Summary Status Byte group consisting of the Summary Status Byte Enable register and the Summary Status Byte is used to determine the general nature of an BENCHTOP MICROWAVE SOURCE event or condition The bits in the Summary Status Byte provide the following Operation Status Group The Operation Status group consisting of the Operation Condition register the Operation Positive Transition register the Operation Negative Transition register the Operation Event register and the Operation Event Enable register C l ILLU LLL tCLu t d x 4 8 Standard Event Status Group The Standard Event Status group consisting of the Standard Event Status register an Event register and the Standard Event Status Enable register is used to determine the specific event that set bit 5 of the Summary Status Byte The bits in the Standard Event Status register provide the following Bit Description 0 Set to indicate that all pending BENCHTOP MICROWAVE SOURCE operations were c
47. rites data to a list file If the name is omitted data will be loaded to the list RAM The RAM list will be played when enabling the list mode The query returns list file data If the file name is omitted list RAM data will be returned Data sent or received has IEEE488 2 definite block data format lt num_digits gt lt byte_count gt lt data byte gt lt data_byte lt num_digits gt specifies how many digits are contained in lt byte_count gt lt byte_count gt specifies how many data bytes follow in lt data_bytes gt Example of definite block data 221130000000 1 1 0 1 0 1 221 byte count is two digits wide 221 21 data bytes will follow 130000000 1 1 0 1 0 1 21 bytes of data The list itself consists of values separated by semicolon and rows separated by carriage return r and or newline Four values frequency in Hz power in dBm dwell time in s delay time in s make a row Each row defines one point of the list Example of a two points list first point 130 MHz 1 1 dBm 100 ms on 100 ms off second point 130 MHz 1 dBm 100 ms on 100 ms off 130000000 1 1 0 1 0 1 r n 140000000 1 0 1 0 1 r n MEMory FILE LIST DELete MEMory FILE LIST DELete filename ALL This command deletes the specified list file Passing ALL deletes all present list files MEMory FILE LIST LOAD MEMory FILE LIST LOAD lt gt This command loads a list file to the list RAM The RAM list will be played whe
48. rogramming language or software intended for instrument front panel control SCPI is designed to be layered on top of the hardware independent portion of IEEE 488 2 4 2 5 commands which are also referred to as SCPI instructions messages to the instrument to perform specific tasks The BENCHTOP MICROWAVE SOURCE command set includes Common commands IEE488 2 mandated commands 16 BNC SCPI required commands SCPI optional commands SCPI 1999 0 SCPI compliant commands that are unique to the BENCHTOP MICROWAVE SOURCE Not all of the commands supported by the instrument are taken from the SCPI standard however their syntax follows SCPI rules 4 3 SCPI Command Syntax Typical SCPI commands consist of one or more keywords parameters and punctuation SCPI command keywords can be a mixture of upper and lower case characters Except for common commands each keyword has a long and a short form In this manual the long form is presented with the short form in upper case and the remainder in lower case Unrecognized versions of long form or short form commands or improper syntax will generate an error Structure of a Command Line A command line may consist of one or several commands It is terminated by an EOI together with the last data byte Several commands in a command line must be separated by a semicolon If the next command belongs to a
49. rom GPIB to USB while maintaining software compatibility with existing software such as instrument drivers and any application that uses VISA This is also what the VXI 11 protocol provides for TCP IP 2 USBTMC with IVI drivers the application programming interface API provided with the instrument supports general programming using the USB interface under Windows operating system using the IVI drivers 2 21 USB TMC Interface Connection and Setup using VISA USBTNC stands for USB Test amp Measurement Class USBTMC is a protocol built on top of USB that allows GPIB like communication with USB devices From the user s point of view the USB device behaves just like a GPIB device For example you can use VISA Write to send the IDN query and use VISA Read to get the response The USBTMC protocol supports service request triggers and other GPIB specific operations USBTNC upgrades the physical layer from GPIB to USB while maintaining software compatibility with existing software such as instrument drivers and any application that uses VISA This is also what the VXI 11 protocol provides for TCP IP BNC NI VISA 3 0 or later allows you to communicate as a controller to BENCHTOP MICROWAVE SOURCE devices NI VISA is configured to detect USBTMC compliant instruments such as the BENCHTOP MICROWAVE SOURCE To use such a device plug it in and Windows should detect the new hardware and launch the New Hardware Wizard Instruct the wizard to search
50. s QUEStionable EVENt This query returns the contents of the questionable status event register and clears it QUEStionable CONDition STATus QUEStionable CONDition This query returns the contents of the questionable status condition register QUEStionable ENABle STATus QUEStionable ENABle This command sets the enable mask of the questionable status event register QUEStionable PTR STATus QUEStionable PTR This command sets the positive transition filter of the questionable status event register QUEStionable NTR STATus QUEStionable NTR This command sets the negative transition filter of the questionable status event register 60 BNC 5 21 SYSTem Subsystem Command Parameters Unit Remark default SYSTem ERRor NEXT SYSTem ERRor ALL SYSTem PRESet SYSTem VERSion SYSTem LOCK SYSTem LOCK RELease ERRor SYSTem ERRor NEXT Return Parameters Integer error number Query command is a request for the next entry in the instrument s error queue Error messages in the queue contain an integer in the range 32768 32768 denoting an error code and associated descriptive text ERRor ALL SYSTem ERRor ALL Return Parameters List of integer error number Query command is a request for the all entries in the instrument s error queue Error messages in the queue contain an integer in the range 32768 32768 denoting an error code and associated des
51. s for the chirp Set to INF for infinite repetitions CHIRp TIME SOURce CHIRp TIME value unit SOURce CHIRp TIME Sets the time span for the chirp CHIRp DlIRection 26 SOURce CHIRp DIRection UD DU DOWN UP SOURce CHIRp DIRection This command sets the direction of the chirp DU means direction down first then direction up UD means direction UP first 27 BNC 5 6 SOURce PHASe Subsystem Command Parameters Unit Remark default SOURce PHASe REFerence SOURCo PRASST AOI PHASe REFerence SOURce PHASe REFerence This command sets the current output phase as a zero reference Subsequent phase adjustments are set relative to the new reference PHASe ADJust SOURce PHASe ADJust lt value gt lt unit gt SOURce PHASe ADJust This command adjusts the phase of the signal The query will only return values in radians RST The preset value is 0 28 BNC 57 SOURce POWer Subsystem Command Parameters Unit Remark default SOURce POWer LE Vel IMMediate AMPLitude lt value gt dBm SOURce POWer MODE FIXed LIST SWEep FIXed SOURce POWer STARt lt value gt dBm SOURce POWer STOP lt value gt dBm SOURce POWer STEP dB SOURce POWer ALC 1 0 ON SOURce POWer ALC LOWN ON OFF 1 0 OFF SOURce POWer ALC HOLD ON OFF 1 0 OFF SOURce POWer AT Tenuation lt value gt dB SOURce POWer AT Te
52. se commands identified by the asterisk at the beginning of the command keyword These commands are used to control instrument status registers status reporting synchronization and other common functions Commands declared mandatory by EEE 488 2 CLS Clear Status Command ESE Standard Event Status Enable Command ESE Standard Event Status Enable Query ESR Standard Event Status Register Query IDN Identification Query OPC Operation Complete Command OPC Operation Complete Query RST Reset Command SRE Service Request Enable Command SRE Service Request Enable Query STB Read Status Byte Query TST Self Test Query WAI Wait to Continue Command Optional common commands described by IEEE 488 2 Option Identification Query 3 11 CLS The Clear Status CLS command clears the status byte by emptying the error queue and clearing all the event registers including the Data Questionable Event Register the Standard Event Status Register the Standard Operation Status Register and any other registers that are summarized in the status byte 12 3 1 2 ESE lt data gt The Standard Event Status Enable ESE command sets the Standard Event Status Enable Register The variable lt data gt represents the sum of the bits that will be enabled Range 0 255 Remarks The setting enabled by this command is not affected by signal generator preset or RST However cycling the signal generator power will
53. soft operating systems Your signal generator implements a socket Applications Programming Interface API that is compatible with Berkeley socket for UNIX systems and Winsock for Microsoft systems The signal generator is also compatible with other standard sockets APIs The signal generator can be controlled using predefined SCPI functions once the socket connection is established in your program Socket connection is available on port 18 2 1 3 Using and Configuring VXI 11 VISA The signal generator supports the LAN interface protocol described in the VXI 11 standard VXI 11 is an instrument control protocol based on Open Network Computing Remote Procedure Call ONC RPC interfaces running over TCP IP A range of standard software such as NI VISA or Agilent IO Config is available to setup the computer signal generator interface for the VXI 11 protocol Please refer to the applicable software user manual and documentation for information on running the program and configuring the VXI 11 interface The program is used to configure the LAN client Once the computer is configured for a LAN client you can use the VXI 11 protocol and the VISA library to send SCPI commands to the signal generator over the LAN interface Example programs are available on request under support anapico com VISA is an IO library used to develop IO applications and instrument drivers that comply with industry standards It is recommended to use the VISA library for pro
54. state changes in the condition register will set corresponding bits in the event register Negative transition filters NTR are used to detect condition changes from True 1 to False 0 positive transition filters PTR are used to detect condition changes from False 0 to True 1 Setting both positive and negative filters True allows an event to be reported anytime the condition changes Transition filters are read write Transition filters are unaffected by queries or CLS clear status and RST commands The command STATus PRESet sets all negative transition filters to all 05 and sets all positive transition filters to all 1 s Event Register The event register latches transition events from the condition register as specified by the transition filter Bits in the event register are latched and once set they remain set until cleared by a query or a CLS command Event registers are read only Enable Register The enable register specifies the bits in the event register that can produce a summary bit The BENCHTOP MICROWAVE SOURCE logically ANDs corresponding bits in the event and enable registers and ORs all the resulting bits to obtain a summary bit Summary bits are recorded in the Summary Status Byte Enable registers are read write Querying an enable register does not affect it The command STATus PRESet sets the Operation Status Enable register and the Questionable Status Enable register to all 0 s 19 BNC 4 7 Status Gr
55. states of the external trigger signal For example when you select POSitive the waveform 57 BNC responds plays during the high state of the trigger signal When the BENCHTOP MICROWAVE SOURCE receives multiple trigger occurrences when only one is required the signal generator uses the first trigger and ignores the rest The Commands NP and PN select both edges with negative first or positive first RST POS TRIGger SEQuence ECOunt TRIGGer SEQuence ECOunt lt value gt TRIGGer SEQuence ECOunt This command sets a modulo on consecutive trigger events Setting the value to N means that only every Nth trigger event will be considered Setting it to one means will use every trigger event that does not occur during a running sweep RST 1 Range 1 to 255 TRIGger OUTPut POLarity TRIGGer OUTPut POLarity NORMal INVerted TRIGGer OUTPut POLarity This command sets the trigger output signal polarity Note that the trigger output must be enabled by sending the SOURce LFOutput SOURce TRIGger command RST NORM TRIGger OUTPut MODE TRIGGer OUTPut MODE NORMal GATE POINt This command sets the trigger output signal mode NORMal The trigger output signal is pulsed once whenever playing a waveform sequence is triggered GATE The trigger output signal is set when playing a waveform sequence is triggered and reset when playing stops POINT The trigger output signal is pulsed for each point of the sweep list playing Note t
56. strument BNC For instance if the instrument has the IP address 192 168 1 50 TCPIP 192 168 1 50 inst0 INSTR is the valid resource name Specification of instO in the resource name is optional In this example also TCPIP 192 168 1 50 INSTR is therefore a valid resource name TCPIP designates the network protocol used and INSTR indicates that the VXI 11 protocol is used If several instruments are connected to the network each instrument has its own IP address and associated resource name The controller identifies these instruments by means of the resource name 2 1 2 Using Sockets LAN Sockets LAN is a method used to communicate with the signal generator over the LAN interface using the Transmission Control Protocol Internet Protocol TCP IP A socket is a fundamental technology used for computer networking and allows applications to communicate using standard mechanisms built into network hardware and operating systems The method accesses a port on the signal generator from which bidirectional communication with a network computer can be established Sockets LAN can be described as an internet address that combines Internet Protocol IP with a device port number and represents a single connection between two pieces of software The socket can be accessed using code libraries packaged with the computer operating system Two common versions of socket libraries are the Berkeley Sockets Library for UNIX systems and Winsock for Micro
57. t the system in which the total cable length exceeds 20 m The number of connectors connected to an individual device must be 4 or less If you connect 5 or more connectors excessive force is applied to the connector part which may result in failure You can choose the device connection topology from star linear and combined Loop connection is not allowed Ess 24 SCPI Commands The Standard Commands for Programmable Instrumentation SCPI provides a uniform and consistent language to control programmable test and measurement devices in instrumentation systems The SCPI Standard is built on the foundation of IEEE 488 2 Standard Codes and Formats It requires conformance to IEEE 488 2 but is pure software standard SCPI syntax is ASCII text and therefore can be attached to any computer test language such as BASIC C or C It can also be used with Test Application Environments such as LabWindows CVI LabVIEW or Matlab SCPI is 10 hardware independent SCPI strings be sent over any instrument interface It works equally well over USB TMC GPIB RS 232 VXIbus or LAN networks Please see the chapter 4 for detailed description of supported SCPI commands 11 3 IEEE 488 Interface Commands 3 1 IEEE Mandated and Optional Common Commands The required common commands are IEEE 488 2 mandated commands that are defined in the IEEE 488 2 standard and must be implemented by all SCPI compatible instruments The
58. t value gt 2 4048 rad V SOURce PM INTernal F REQuency lt value gt 400 Hz SOURce PM INTernal SHAPe RD RU SINE SQUare TRlangle SINE SOURce PM SOURce EXTernal INTernal EXT SOURce PM STATe ON OFF 1 0 OFF PM DEViation SOURce PM SENSitivity value SOURce PM SENSitivity This command sets the phase modulation deviation This setting will be used if PM SOURce is set to LFGenerator The variable value is expressed in units of radians RST 2 4048 PM SENSitivity SOURce FM SENSitivity value SOURce FM SENSitivity This command sets the phase modulation deviation per one volt peak amplitude signal input This setting will be used if PM SOURcCe is set to EXTernal The variable value is expressed in units of radians per Volt RST 2 4048 PM INTernal FREQuency SOURce PM INTernal F REQuency value SOURce PM INTernal F REQuency This command sets the phase modulation rate in Hz This setting will be used if PM SOURce is set to INTernal The variable value is expressed in Hertz RST 400 PM INT SHAPe SOURce PM INT SHAPe RD RU SINE SQUare TRlangle SOURce PM INT SHAPe This command specifies the PM modulation shape RD selects Ramp Down and RU ramp up Standard waveforms available are SINE SQUare and TRlangle 49 PM SOURce SOURce PM SOURce EXTernal INTernal SOURce PM SOURce This command selects the PM modulation signal source If INTernal is select
59. the low amplitude noise mode providing up to 1 1000 dB output power resolution When enabled the automatic levelling control will work in a mode similar to hold In opposite to the hold mode The hold setpoint won t be sampled again when changing the output power setting using the SOURce POWer LEVel IMMediate AMPLitude command The hold setpoint won t be sampled again when turning RF on or off using the OUTPut STATe command ALC HOLD SOURce POWer ALC HOLD ON OFF 1 0 SOURce POWer ALC Devices with option PE only This command sets the automatic level control into hold mode The amplitude level control loop is open RST The preset value is 0 ATTenuation SOURce POWer ATTenuation value SOURce POWer ATTenuation Devices with option PE only This command sets the power range extension attenuator This command will also turn off automatic attenuation setting Refer to SSOURce POWer ATTenuation AUTO OFF for details Attenuator input 30 BNC RF power shall be 30 10 dBm e g using SOURce POWer ATTenuation value of 50 dB the output RF power range is 80 40 dBm RST The preset value is 0 ATTenuation AUTO SOURce POWer ATTenuation AUTO ON OFF 1 0 SOURce POWer AT Tenuation AUTO Devices with option PE only This command turns the power range extension on or off Turning it off allows fast power sweeps for devices featuring an extended output power range RST The preset value is 0
60. tores the instrument s LAN settings to their factory default values LAN GATeway SYSTem COMMunicate LAN GATeway ipstring SYSTem COMMunicate LAN GATeway This command sets the gateway for local area network LAN access to the signal generator from outside the current sub network The query returns the current setting not the saved setting LAN IP SYSTem COMMunicate LAN IP lt ipstring gt SYSTem COMMunicate LAN IP This command sets the signal generator s local area network LAN internet protocol IP address for your IP network connection LAN RESTart SYSTem COMMunicate LAN RESTart 63 This command restarts the network to enable changes that have been made to the LAN setup LAN SUBNet SYSTem COMMunicate LAN SUBNet lt ipstring gt SYSTem COMMunicate LAN SUBNet This command sets the signal generator s local area network LAN subnet mask address for your internet protocol IP network connection 64 BNC 5 23 UNIT Subsystem Command Parameters Unit default Remark UNIT POWer W V DBM DB DBM UNIT POWer UNIT POWer W V DBM DB RST DBM UNIT FREQuency UNIT FREQuency HZ MHZ GHZ RST HZ 65
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