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VM2164 - VTI Instruments

1. OUTPut TTLTrg Purpose This command selects the TTL trigger line that will receive the output Type Instrument specific command Command Syntax OUTPut TTLTrg lt line gt Command Parameters lt line gt 0 7 RST Value 0 Query Syntax OUTPut TTLTrg Query Parameters N A Query Response Returns the set lt line gt parameter value Description This command selects the TTL trigger line that will receive the output Example Command Query Response Description OUTP TTLT 3 Selects TTLTS trigger line for output OUTP TTLT 3 Indicates that the TTLTS trigger line is selected Related Commands VM2164 Command Dictionary 127 VXI Technology Inc OUTPut TTLTrg STATe Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command toggles the use of TTL trigger lines as usable outputs Instrument specific command OUTPut TTLTrg STATe lt boolean gt lt boolean gt 0 1 OFF ON 1 OUTPut TTLTrg STATe N A Returns the set lt boolean gt parameter value This command toggles the use of TTL trigger lines as a useable output Setting the value to 0 or OFF disables the use of TTLT lines as outputs while setting the value to 1 or ON enables it Command Query Response Description OUTP TTLT STAT 1 Enables the use of the TTL tri
2. AE lt dacnum gt 1 12 lt dacoffset gt Numbers greater than 1948 and less than 2148 RST Value N A Query Syntax CALibration DAC OFESet Query Parameters N A Query Response Returns the set lt dacoffset gt parameter value Description This command calibrates one of two factors used by the DAC Calibration commands should only be executed by qualified Ay personnel Changing these values incorrectly can cause the instrument to perform improperly Command Query CAL DAC 1 OFFSET 2048 CAL DAC 1 0FFSET Response Description Sets the DAC slope offset for Channel 1 2048 Returns the DAC offset value Examples Related Commands CALibration SECure CODE CALibration SECure STATe VM2164 Command Dictionary 79 VXI Technology Inc CALibration DAC SLOPE Calibrates one of two factors used by the DAC Instrument specific command CALibration DAC lt dacnum gt SLOPe lt dacslope gt lt dacnum gt 1 2 lt dacslope gt At 1x numbers greater than 500 and less than 300 At 10x numbers greater than 50 and less than 30 N A CALibration DAC SLOPe N A Returns the set lt dacslope gt parameter value This command calibrates one of two factors used by the DAC personnel Changing these values incorrectly can cause the A Calibration commands should only be executed by qualified instrument to perform improper
3. Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Command These queries configure the counter to measure the voltage on the MEASure suffix input channel Instrument specific query N A N A 1 MEASure 112 SCALar l ARRay VOL Tage lt volt_func gt lt volt_func gt AC DC MAX MIN PTP lt array size gt 1 to 1000 If SCALar is specified lt array size gt is not a valid parameter If ARRay is specified lt array size gt is a required parameter These commands can or will modify the following e function set to AC DC MIN MAX or PTP e auto setup mode no effect e aperture events mode no effect These queries configure the counter to measure the voltage on the MEASure suffix input channel The measurement is initiated and the result placed in the output buffer The lt expected value gt and lt resolution gt parameters are accepted but ignored The maximum and minimum voltage of the input signal is determined assuming either a DC signal or a repetitive signal with a frequency of at least 1000 Hz The user must select the proper INPut COUPling and INPut IMPedance separately The voltage measurements are calculated as follows AC maximum minimum 2 828 DC maximum minimum 2 MAXimum maximum MINimum minimum PTPeak maximum mini
4. N A This query returns the number of events as set by the most recent SENSe EVENts command If one of the optional arguments is used the DEFault MINimum or MAXimum value of aperture is returned instead This command sets the counter lt of events gt If the SENSe lt function gt MODE is set to EVENTS the counter will make a measurement for a number of cycles of the input signal The range of events is 1 to 9e15 however the measurements must complete in 9e6 seconds 99 days to avoid errors Note An Event mode with greater than one event is invalid for Time Interval with Delay Duty Cycle or Phase Angle measurements Command Query Response Description SENS EVEN MIN Returns set events to minimum SENS EVEN 1 000000000000000e 00 Queries events value VM2164 Command Dictionary 133 VXI Technology Inc SENSe MODe Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command sets the counter to make a measurement for a length of time APERture or for a number of cycles of the input signal EVENTs Instrument specific command SENSe MODe lt mode gt lt mode gt APERture EVENTs APERture SENSe MODe DEFault N A This query returns the currently set mode as set by the most recent SENSE MODE CONFigure or MEASure command If the o
5. Command Syntax STATus OPERation ENABle lt NRf gt Command Parameters lt NRf gt numeric ASCII value from 0 to 32767 RST Value lt NRf gt must be specified Query Syntax STATus OPERation ENABle Query Parameters N A Query Response lt NRf gt Numeric ASCII value from 0 to 32767 Description Examples Command Query This command enables bits in the Operation Status Register s enable register to report to the summary bit sets Status Bytes register bit 7 to true The query reports the bits enabled in the Operation Status Register s enable register then clears the register contents and enters the value into the computer STAT OPER ENAB 33 STAT OPER ENAB Enables bit 0 and bit 5 33 Indicates that bit 0 and 5 are enabled Related Commands STATus OPERation CONDition STATus OPERation EVENt 146 VM2164 Command Dictionary www vxitech com STATUus OPERation NTR Purpose Sets the negative transition filter Type Required SCPI command Command Syntax STATus OPERation NTR Command Parameters N A RST Value N A Query Syntax STATus OPERation NTR Query Parameters N A Query Response N A Description Sets the negative transition filter Setting a bit in the negative transition filter shall cause a to 0 transition in the corresponding bit of the associated condition register to cause
6. 76 VM2164 Command Dictionary www vxitech com CAL Culate VA Riance Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This query calculates and returns the variance for a set of data Instrument specific query N A N A N A CAL Culate VARiance lt count gt lt offset gt lt step_size gt lt count gt 1 to 1000 lt offset gt 1 to 1000 lt step size gt 1 to 1000 Returns the variance for a set of data as defined by the equation below This query calculates and returns the variance for a set of data The formula for variance used is ee n Ex E n n ed where n the number of data summed x the value of the data in the set If no valid data values were found No Data will be returned The optional parameters are for calculating selected values in the memory buffer The optional lt count gt parameter specifies the number of data points to calculate If no lt count gt is specified then the number measurements last taken will be the default The optional lt offset gt parameter determines at which point in memory values will start to be calculated The optional lt step_size gt parameter determines the number of measurements to skip before taking a value to be used Note In order to specify a lt step_size gt the lt count gt and
7. RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command configures the counter to measure the rise or fall time of the signal on the CONFigure suffix input channel Instrument specific command CONFigure 112 SCALar I ARRay RTIMelFTIMelRISE TIMEIFALL TIME lt array size gt lt low reference gt lt high reference gt lt expected value gt lt resolution gt lt array size gt 1 to 1000 If SCALar is specified this parameter is no longer valid If ARRay is specified lt array size gt is a required parameter lt low reference gt 10 to 90 lt high reference gt 10 to 90 lt array size gt lt low reference gt 10 lt high reference gt 90 CONFigure N A Returns the current measurement configuration This includes any channels SCALar or ARRay settings and measurements selected This command configures the counter to measure the rise or fall time of the signal on the CONFigure suffix input channel The unit of the lt low reference gt and lt high reference gt are a percentage The units of lt expected value gt and lt resolution gt are seconds If the lt expected value gt argument is used the expected period of the input signal should be used not the expected rise fall time This measurement uses both comparators of the input channel If a reference value is specified and INPut SETup AUTO is set to OFF IN
8. Related Commands This command sets the duration of time that will be allowed for a signal to occur before a measurement is aborted Instrument specific command INPut 1 2 SETup TIMe lt time_out gt 0 04 INPut 1 2 SETup TIMe N A Returns the current value of the lt time_out gt parameter This command sets the amount of time after an INITiate before a measurement is aborted If a signal is not received within this allotted period of time the measurement is aborted If a signal source of less than 25 Hz is used then this measurement should be adjusted accordingly frequency 1 time Note The time used will be the longer of the two values set for the aperture and INPut SETup TIMe settings Command Query Response Description INP1 SET TIM 0 1 Sets the allowable time needed to measure a 10 Hz signal INP1 SET TIM 0 1 Returns the set time out value VM2164 Command Dictionary 115 VXI Technology Inc MEASure 1 21 SCALar ARRay DCY ClelINDUTycyclelPDUTycycle Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Command This query performs a positive or negative duty cycle measurement Instrument specific query N A N A 1 MEASure 112 SCALar l ARRay DCYCleINDUTycyclelPDUTycycle lt array size gt lt reference gt
9. lt expected value gt lt resolution gt lt array size gt 1 to 1000 If SCALar is specified lt array size gt is not a valid parameter If ARRay is specified lt array size gt is a required parameter This command will modify the following e function set to PDUT or NDUT e aperture described below e aperture events mode set to aperture The input channel attenuation offset gain level and slope can be modified This query performs a positive or negative duty cycle measurement The reference is the percent of the signal s peak value i e the percent of the peak to peak value as measured from the signal s minimum Note that when DCYCle is the same as PDUTycycle the lt expected value gt and lt resolution gt are accepted but not used Command Query Response Description MEAS2 ARR NDUT Takes 1000 negative duty cycle measurements 1000 25 with a trigger point of 25 of the signal s peak MEAS2 ARR PDUT 100 Takes 100 positive duty cycle measurements with 50 a trigger point of 50 of the signal s peak value MEAS1 PHAS Take a phase measurement from Channel I to Channel 2 MEAS TINT DEL EVEN Take a time interval with delay measurement 100 from Channel 1 to the 100 edge on Channel 2 MEAS10 TOT Totalize Channel I and the 1 GHz VCO CONFigure SENSe 116 VM2164 Command Dictionary www vxitech com MEASure 112 SCALar ARRay NWIDthIPWIDth Purpose
10. DC VOLTAGE MEASUREMENT Range 1x 4 V 10x 40 V Resolution 1x 2 5 mV 10x 25 mV Accuracy 1x 12 5 mV 10x 125 mV PEAK VOLTAGE MEASUREMENT Range 1x 5 V 10x 50 V Resolution 1x 2 5 mV 10x 25 mV Accuracy 1x 12 5 mV 10x 125 mV VM2164 Introduction VXI Technology Inc OSCILLATOR SPECIFICATIONS NO OSCILLATOR USE VXI 10 MHz Performance 100 ppm EX2500A Performance 50 ppm Performance High Performance Aging 1 x 10 year Temperature 3 x 10 0 C to 50 C Adjustment Range 3 x 10 minutes Warm Up Time N A Performance Ultra High Performance Aging 1 x 10 year 1 x 10 day Temperature 1 x 10 0 C to 50 C Adjustment Range 4 x 10 minutes Warm Up Time lt 3 minutes 20 VM2164 Introduction www vxitech com SECTION 2 PREPARATION FOR USE INTRODUCTION When the VMIP is unpacked from its shipping carton the contents should include the following items 1 VMIP VXIbus module 1 VM2164 Counter Timer User s Manual this manual All components should be immediately inspected for damage upon receipt of the unit The chassis should be checked to ensure that it is capable of providing adequate power and cooling for the VMIP Once the chassis is found adequate the VMIP s logical address and the chassis backplane jumpers should be configured prior to the VMIP s installation Once these steps are complete it may then be installe
11. FUNCtion Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands The SENSe FUNCtion command selects a function and input channel without changing most of the counter setup Instrument specific command SENSe 112110120 FUNCtion TOTalize N A SENSe 112110120 FUNCtion N A This query moves the currently selected function to the output buffer Functions are selected by a SENSe FUNCtion CONFigure or MEASure command The SENSe FUNCtion command selects a function and input channel without changing most of the counter setup The input filtering coupling and impedance are not changed by these commands The filtering coupling and impedance that is appropriate for the input signal must be selected by the user The input attenuation offset gain and comparator hysteresis are not changed by these commands The comparator slopes and thresholds however are changed to default by these commands If INPut SETup AUTO autotrigger is set to ON or ONCE the input attenuation offset gain and comparator hysteresis CONFigure or MEASure command descriptions for detail of these commands The possible parameters for this command are listed above Command Query Response Description SENS1 FUNC TOT Sets function to totalize SENS FUNC TOT VM2164 Command Dictionary
12. Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Command This query configures the counter to measure the positive or negative pulse width time of the signal on the MEASure suffix input channel Instrument specific query N A N A 1 MEASure 112 SCALar l ARRay NWIDthIPWIDth lt array size gt lt reference gt lt expected value gt lt resolution gt lt array size gt 1 to 1000 If SCALar is specified lt array size gt is not a valid parameter If ARRay is specified lt array size gt is a required parameter This command will modify the following e function set to PWID or NWID e aperture described below e aperture events mode set to APERture This query configures the counter to measure the positive or negative pulse width time of the signal on the MEASure suffix input channel The measurement is initiated and the result placed in the output buffer The units of the lt reference gt are percentage The units of lt expected value gt and lt resolution gt are seconds If the lt expected value gt argument is used the expected period of the input signal should be used not the expected pulse width This measurement uses both comparators of the input channel The lt reference value gt is used to set the comparator threshold levels to a percentage of the peak to peak signal If
13. ae Technology VM2164 COUNTER TIMER USER S MANUAL P N 82 0059 000 Rev June 29 2010 VXI Technology Inc 2031 Main Street Irvine CA 92614 6509 949 955 1894 VXI Technology Inc www vxitech com TABLE OF CONTENTS INTRODUCTION Certificato ist ltd dsd Ada ae 7 MA ias 7 AS RR 7 Restricted Rights Legendes iieii E e e RRE REEE o A EEEE ER E E 7 DECLARATION OF CONFORMITY sors e eaer Aroa o EE E EEE E Ea EEE ARREA AE ES EN RE E EE 8 GENERAL SAFETY INSTRUCTIONS ioen e eeaeee iar A aa e arae E a a e a eaa ESE 9 Terms and Symbole innn a e a E a E E E S A E 9 W ar 8S ctas ad as ote ia td e dl cla a id dass 9 DUPPORT RESOURCES 2 oo iaa da 11 SECTION A NN 13 INTRODUCTION sei 13 Dr tad 13 POMO ainda aiii 14 Calibration a loci 14 Built In Software Functwoms access ie ESKE ies 15 EAU ebria 15 General Special Ii Aaa E laa 16 Oscillator Specifications a Ee tee Beal de die pee aie Ae Tee 20 SECTION 2 ssscssesssssasevassasscaseseeosaseunsondceasenssensospesovasnnsssensdosscedsendeessesssdasessodssasesosbcesbaseeadsessensenaseosssunssnsceasenaseaeossedsessoessses 21 PREPARATION FOR USE vi bodies 21 A a cla 21 Calculating System Power and Cooling Requirements coooonoonccnonconcononnnoncnnconnonnnnonncnnn nono conc on crono caseeeeaeeateseeneeats 21 Setting the Chassis Backplane JUMPEIS oooonncnocnccnoconononcnnnnnnonnnonon anno corona nono AEE E EEEa aran aaron EERE 22 Settins the Logical Add ta A A EE ER E 2
14. scount SumXX SumXX scount SumY SumY frequency phase SumXY SumXyY scount frequency phase 3 67 If phase 359 then set phase 1 3 68 If phase phasestop then set phase 359 3 69 Repeat steps 3 66 through 3 68 until phase 359 3 70 Set scount scount 1 3 71 Calculate the Least Square Fit for the current data using the following equations MO scount x SumXY za SumX x SumY BO SumY x SumXX Sl SumX x SumXY scount x SumXX SumX x SumX scount x SumXX SumX x SumX 3 72 If MO gt 0 000001 and MO lt 0 000001 then set done 1 3 73 If done 0 and MO lt 0 then set CALSTOP CALSTOP 5e 16 CALSTAR CALSTAR 5e 16 3 74 If done 0 and MO gt 0 then set CALSTOP CALSTOP 5e 16 CALSTAR CALSTAR 5e 16 3 75 Set phase phasestart 3 76 Calculate the frequency using the new CALSTOP using the following equation XCNTR phase YCNTR phase 1 x 0 0000001 TECA phase x CALTAR TECB phase x CALSTOP CALOFFS Freq phase 3 77 If phase 359 then set phase 1 3 78 If phase phasestop then set phase 359 3 79 Repeat steps 3 76 through 3 78 until phase 359 3 80 Set Done 0 Counter 0 Freqsum 0 S Fregsumplateau umX Y scount frequency phase 164 VM2164 Index www vxitech com 3 81 3 82 Freq phase 3 83 3 90 Freq phase 3 91 3 92 3 93 3 94 3 95 3 96 3 99 Set phase phase
15. Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command sets the counter measurement aperture lt time gt Instrument specific command SENSe APERture lt time gt DEFault MINimum MAXimum lt time gt le 8 to 9e6 le 1 SENSe APERture DEFault MINimum MAXimum N A CONFigure or MEASure command If one of the optional arguments is used the DEFault MINimum or MA Ximum value of aperture is returned instead This command sets the counter measurement aperture lt time gt Whether the aperture time is used or not depends on the mode set with one of the SENSe MODE commands The default mode is to use an aperture The units are in seconds and range from le 8 to 9e6 in le 9 size steps CONFigure and MEA Sure commands can set the aperture as well Note Time Interval with Delay Phase and Duty Cycle use all available hardware timers When the counter is in one of these modes the aperture is controlled by software and has a minimum period of approximately 10 ms Command Query Response Description SENS APER DEF Returns set aperture to default SENS APER 1 000000000000000e 01 CONFigure MEA Sure SENSe MODE VM2164 Command Dictionary 131 VXI Technology Inc SENSe COUNt DEFault MINimum MA Ximum Purpose Type Command Syntax Command Parameters RST Valu
16. Inc makes no other warranties express or implied with respect to the quality of product beyond the description of the goods on the face of the contract VTI specifically disclaims the implied warranties of merchantability and fitness for a particular purpose RESTRICTED RIGHTS LEGEND Use duplication or disclosure by the Government is subject to restrictions as set forth in subdivision b 3 i1 of the Rights in Technical Data and Computer Software clause in DFARS 252 227 7013 VXI Technology Inc 2031 Main Street Irvine CA 92614 6509 U S A VM2164 Preface 7 VXI Technology Inc DECLARATION OF CONFORMITY Declaration of Conformity According to ISO IEC Guide 22 and EN 45014 MANUFACTURER S NAME VXI Technology Inc MANUFACTURER S ADDRESS 2031 Main Street Irvine California 92614 6509 PRODUCT NAME Counter Timer MODEL NUMBER S VM2164 PRODUCT OPTIONS All PRODUCT CONFIGURATIONS All VXI Technology Inc declares that the aforementioned product conforms to the requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 366 EEC inclusive 93 68 EEC and carries the CE mark accordingly The product has been designed and manufactured according to the following specifications SAFETY EN61010 2001 EMC EN61326 1997 w A1 98 Class A CISPR 22 1997 Class A VCCI April 2000 Class A ICES 003 Class A ANSI C63 4 1992 AS NZS 3548 w A1 amp A2 97 Class A FCC Part 15 Subpart B Class A EN 6
17. NewY StarTec and StopTec in text file to use for next test Get NewX and NewY from previous text file and save as Xcount and Y count Find the StartTec Minimum and Maximum from previous text file and save in StartTecMin and StartTecMax Find the StopTec Minimum and Maximum from previous text file and save in StopTecMin and StopTecMax 160 VM2164 Index www vxitech com 3 16 Calculate the Tec slope by using the following equations 0 000001 StartTecSlope f StartTecMax StartTecMin StopTecSlope Sica StopTecMax StopTecMin Absolute value between the StartTecMin and StopTecMin or StartTecMax and StopTecMax should not be greater than 500 Otherwise the TEC data is corrupt Get the TEC offset constant by issuing command CAL TEC OFFSET and save in K3 Calculate the frequency with XCount YCount StarTec and StopTec in previous text file by using the equation XCount Y Count x 0 000000 1 StartTec x StartTecSlope StopTech x StopTechSlope Freq If the frequency is less than 9 999 995 Hz or greater than 10 000 005 then StartTecSlope StartTecSlope StopTecSlope StopTecSlope Repeat steps 3 14 and 3 15 for all data in the previous text file Calculate the frequency with XCount YCount StarTec and StopTec in previous text file by using the equation XCount Y Count x 0 000000 1 StartTec x M1 StopTech x M2 K3 Freq where M1
18. TTLTRG7 HOLD IMMEIDATE CTR_CHAN2 CONF FREQ Configures the counter to read frequency ARM SOUR BUS Arms the BUS source INIT Begins the measurement ABOR Aborts the measurement Related Comma INITiate VM2164 Command Dictionary 43 VXI Technology Inc ARM SEQuence STARt LA Yer DELay Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Examples Related Commands Specifies a time delay to occur after the receipt of an arm signal before actually arming the counter Instrument specific command ARM SEQuencel I STARt LAYer DELay lt time_delay gt lt time_delay gt 0 to 65 535 seconds in 1 us steps 0 seconds pass through ARM SEQuence 1 I STARt LA Yer DELay N A Returns the set lt time_delay gt parameter value Specifies a time delay to occur after receipt of an arm signal prior to actually arming the counter If the arming source selected is fixed i e HOLD IMMEDIATE CTR_CHAN2 this command will have no effect on the counter arming This command always zeros the event count delay so specifying a delay of zero places the arm subsystem in pass though mode In this mode the instrument arms immediately upon the receipt of a trigger Command Query Response Description CONF VOLT DC Sets the counter for DC voltage measurement ARM SOUR TTLTO Arms
19. VXI Technology Inc CONFigure 11213 SCALar ARRay FREQuency RATio Purpose This command configures the counter to measure the ratio of the frequencies of the signals on the CONFigure suffix input channel and lt second channel gt Type Instrument specific command Command Syntax CONFigure 1 2 3 SCALar ARRay FREQuency RATio lt array size gt lt second_channel gt lt expected value gt lt resolution gt Command Parameters lt array size gt to 1000 If SCA Lar is specified this parameter is no longer valid If ARRay is specified lt array size gt is a required parameter RST Value 1 Query Syntax CONFigure Query Parameters N A Query Response Returns the current measurement configuration This includes any channels SCALar or ARRay settings and measurements selected Description This command configures the counter to measure the ratio of the frequencies of the signals on the CONFigure suffix input channel and lt second channel gt The lt expected value gt and lt resolution gt arguments have no units The parameters lt expected value gt and lt resolution gt are accepted but are not used This command will modify the following e function set to FREQuecy RATio e aperture set to default e aperture events mode set to APERture If autosetup mode is ON or ONCE the input channel attenuation offset gain level slope can be modified The SENSe suffix selects the
20. x 9 9999999999e 06 TEST Performs an internal communication test TEST ALL The Test subsystem handles the self test operations of the instrument UNIT ANGLe The UNIT subsystem command specifies the units for the phase measurements ee i a SS Unit RAD as either degrees or radians and determines whether the units will be positive or X s Zero MIN centered around zero STATus OPERation CONDition The STATus OPERation CONDition query returns the current operational x 0 status of the counter STATus OPERation ENABle Sets the Questionable Status Enable Register STATus OPERation NTR Sets the negative transition filter STATus OPERation PTR Sets the positive transition filter STATus OPERation EVENt Queries the Operation Status Register s event register STATus PRESet Presets the Status Registers STATus QUEStionable CONDition Queries the Questionable Status Condition Register STATus QUEStionable ENABle Sets the Questionable Status Enable Register STATus QUEStionable EVENt Queries the Questionable Status Event Register TIO UYIITXA MMM VXI Technology Inc COMMAND DICTIONARY The remainder of this section is devoted to the actual command dictionary Each command is fully described on its own page In defining how each command is used the following characteristics are used Purpose Describes the purpose of the command Type Describes th
21. 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 2 12 2 13 2 14 2 15 2 16 VXI Technology Inc Move the function generator output to the VM2164 Channel 2 Input and adjust C52 using the narrow blade end of the adjustment screwdriver for the flattest top square wave while monitoring TP2 Install the Input Capacitance Normalizer between the coaxial cable and the Channel 2 Input of the VM2164 Adjust C72 using the narrow blade end of the adjustment screwdriver while monitoring TP2 for the flattest top of the square wave This completes the front end calibration of the VM2164 Connect Synthesizer Function Generator oven 10 MHz output Backside to UUT External Reference Input through cable BNC Plug to SMB Plug Connect Voltage Source to UUT Channel 1 cable 44 pin connector plug to SMB plug Set UUT Channel 1 to DC Couple by issuing command INP1 COUP DC Apply Voltage Source 3 V to UUT Channel 1 Set DAC level at 2048 by issuing command MFGTEST LEVEL amp Str Channel amp E Str evel Compare DAC level with UUT comparator by issuing command MFGTEST COMP amp Str Channel If compared return value is true then decreases DAC level by Delta 1024 If compared return value is false then increase DAC level by Delta 1024 Repeat steps 1 4 through 1 6 where Delta 50 of previous value The process continues until Delta approaches or becomes zero The final DAC level is saved as L
22. Parameters RST Value Query Syntax Query Parameters Query Response Description Queries and clears the Standard Event Status Register TEEE 488 2 Common Command N A Numeric ASCII value from 0 to 255 The Event Status Register ESR query queries and clears the contents of the Standard Event Status Register This register is used in conjunction with the ESE register to generate the Event Status Bit ESB in the Status Byte The layout of the ESR is Bit 0 Operation Complete Bit 1 Request Control Bit 2 Query Error Bit 3 Device Dependent Error Bit 4 Execution Error Bit 5 Command Error Bit 6 User Request Bit 7 Power On The Operation Complete bit is set when it receives an OPC command The Query Error bit is set when data is over written in the output queue This could occur if one query is followed by another without reading the data from the first query The Execution Error bit is set when an execution error is detected Errors that range from 200 to 299 are execution errors The Command Error bit is set when a command error is detected Errors that range from 100 to 199 are command errors The Power On bit is set when the module is first powered on or after it receives a reset via the VXI Control Register Once the bit is cleared by executing the ESR command it will remain cleared Examples Command Query Response Description Related Commands A 34 VM2164 Command Diction
23. TINTerval VOLTage AC VOLTage DC VOLTage MINimum VOLTage MAXimum VOLTage PTPeak N A SENSe 1 2 FUNCTION N A This query moves the currently selected function to the output buffer Functions are selected by a SENSe FUNCtion CONFigure or MEA Sure command This command selects a function and input channel without changing most of the setup of the counter The input coupling and impedance are not changed by these commands The user must select the coupling and impedance that makes sense for the input signal The input attenuation offset gain and comparator hysteresis are not changed However the comparator slopes and thresholds are changed to defaults If INPut SETup AUTO autotrigger is set to ON or ONCE the input attenuation offset gain and comparator hysteresis may change when the measurement is started The possible parameters for this command are listed above Note DCYCle is the same as PDUTycycle FTIMe is the same as FALL TIME and RTIMe is the same as RISE TIME Command Query Response Description SENS1 FUNC FREQ Sets function to frequency SENS FUNC FREQ Queries set function VM2164 Command Dictionary 137 VXI Technology Inc SENSe 11213 FUNCtion Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example
24. The product referred to herein is warranted against defects in material and workmanship for a period of three years from the receipt date of the product at customer s facility The sole and exclusive remedy for breach of any warranty concerning these goods shall be repair or replacement of defective parts or a refund of the purchase price to be determined at the option of VTI For warranty service or repair this product must be returned to a VXI Technology authorized service center The product shall be shipped prepaid to VTI and VTI shall prepay all returns of the product to the buyer However the buyer shall pay all shipping charges duties and taxes for products returned to VTI from another country VTI warrants that its software and firmware designated by VTI for use with a product will execute its programming when properly installed on that product VTI does not however warrant that the operation of the product or software or firmware will be uninterrupted or error free LIMITATION OF WARRANTY The warranty shall not apply to defects resulting from improper or inadequate maintenance by the buyer buyer supplied products or interfacing unauthorized modification or misuse operation outside the environmental specifications for the product or improper site preparation or maintenance VXI Technology Inc shall not be liable for injury to property other than the goods themselves Other than the limited warranty stated above VXI Technology
25. This command will modify the following e function set to PERiod e aperture described below e aperture events mode set to APERture Configures the counter to measure the period of the signal on the MEASure suffix input channel The measurement is initiated and the result placed in the output buffer The units of lt expected value gt and lt resolution gt are seconds If autosetup mode is ON or ONCE the input channel attenuation offset gain level and slope can be modified If the optional arguments lt expected value gt and lt resolution gt are not used e aperture is set to the default value If only the lt expected value gt argument is used e aperture is set to the default value If both lt expected value gt and lt resolution gt are used the aperture is calculated as follows apperature 1 Pt Hoe expected log resolution with a minimum of le 8 and a maximum of 5 seconds A longer aperture may be set with the SENSe FREQuency APERture command Command Query Response Description CONFigure SENSe 124 VM2164 Command Dictionary www vxitech com MEASure 1 2110120 SCALar TOTalize Purpose This query performs a totalize measurement Type Instrument specific query Command Syntax N A Command Parameters N A RST Value N A Query Syntax MEASure 112110120 SCALar TOTalize Query Parameters N A Query Response Returns the value
26. aa Liv 149 STATUS PRES ss 150 VM2164 Preface 5 VXI Technology Inc STATus QUEStionable CONDITION sirai aa E E A a A aE E E E SER iE 151 STATus QUEStionable ENAB E iii aiii 152 STATus QUEStionable EVENt c ccccssccssscessecsssccssssesssecsessessseceesseeesesessessseceesssesaecessseaseseaeesesaecensesnaeees 153 SECTION M A AA 156 CALIBRATION AND VERIFICATION ccccccssssssccecesesescenececececsessaaeeecececessnaeeeaeececseneaseaeseccesesesaececeseeesensaaeeeeeeeeeeeas 156 TED A 156 Equipment Us dicos lili 156 LEIOA A EEE 156 1 Front End Calibration Procedure oooocccccnononononononnnonanananononnconanananonenocnnnnnnnnnnonocnononnonenononnononannnonnccrccnnnnnns 157 DD AC PPS a Or A EEEN 158 3 Calibrate D E ERER e EAEE ENESA IO 160 4 Time Interval Offset Calibration ccccccccecsesscccececceesessscssesccccsesseesseccesesesseesssssescecssssessescecscessesseeeens 166 A O 167 6 VM2164 Preface www vxitech com CERTIFICATION VXI Technology Inc VTD certifies that this product met its published specifications at the time of shipment from the factory VTI further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology formerly National Bureau of Standards to the extent allowed by that organization s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY
27. command CAL DAC1 SLOPE amp Str Scale1 2 24 Send Offset1 to the instrument by issuing command CAL DAC1 OFFSET amp Str Offset1 2 25 Connect Voltage Source to UUT Channel 2 2 26 Set UUT Channel 2 to DC Couple by issuing command INP2 COUP DC 2 27 Apply 3 V from Voltage Source to UUT Channel 2 2 28 Repeat steps 2 4 through 2 7 2 29 Apply 3 V from Voltage Source to UUT Channel 2 2 30 Repeat steps 2 9 through 2 13 2 31 Send Scale1 to the instrument by issuing command CAL DAC2 SLOPE amp Str Scale1 2 32 Send Offset to the instrument by issuing command CAL DAC2 OFFSET amp Str Offset1 2 33 Set the attenuation 10 times on the Channel 2 by issuing command INP2 ATT 10 2 34 Apply 20 V from Voltage Source to UUT Channel 2 2 35 Repeat steps 2 4 through 2 7 2 36 Apply 20 V from Voltage Source to UUT Channel 2 2 37 Repeat steps 2 9 through 2 12 and step 2 21 2 38 Send Scalel to the instrument by issuing command CAL DAC2 SLOPE amp Str Scale1 2 39 Send Offset1 to the instrument by issuing command CAL DAC2 OFFSET amp Str Offsetl mdd 2 40 Store the values in non volatile memory by issuing the command CAL STORE VM2164 Calibration and Verification 159 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 3 11 VXI Technology Inc Remove cable 44 pin connector plug to SMB plug from voltage source to UUT Ch
28. command initiates the current trigger sequence Type Instrument specific command Command Syntax N A Command Parameters N A RST Value N A Query Syntax N A Query Parameters N A Query Response N A Description Initiates its current trigger sequence After the instrument has completed the current trigger sequence it enters the idle state Example Command Query Response Description INIT IMM Initiates the current trigger sequence Related Commands READ MEASure ARM 104 VM2164 Command Dictionary www vxitech com INPut 112 ATTenuation DEFault MINimum MAXimum Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command sets the input block signal attenuator for the specified channel Instrument specific command INPut 112 ATTenuation lt attentuation gt DEFault MINimum MAXimum lt attenuation gt 1 or 10 Default value 1 1 INPut 112 ATTenuation DEFault MINimum MAXimum N A Without one of the optional parameters this query returns the current setting of the input block signal attenuator for the specified channel If one of the optional parameters is used the default minimum or maximum value for attenuation is returned instead The possible values returned are 1 or 10 This command s
29. enabled the module will generate a REQUEST TRUE event via an interrupt See the STB Command for the layout of bits Note Bit 6 is always internally cleared to zero as required by IEEE 488 2 section 11 3 2 3 The layout of the Service Request Enable Register is Bit 0 Unused Bit 1 Unused Bit 2 Error Queue Has Data Bit 3 Questionable Status Summary Not Used Bit 4 Message Available Bit 5 Event Status Summary Bit 6 0 per IEEE 488 2 section 11 3 2 3 Bit 7 Operation Status Summary Examples Command Query Response Description SRE 4 Sets the service request enable register SRE 4 Returns the value of the SRE register Related Commands N A 38 VM2164 Command Dictionary www vxitech com STB Purpose Queries the Status Byte Register Type TEEE 488 2 Common Command Command Syntax N A MMe ere N A RST Value N A Query Syntax STB Query Parameters N A Query Response Numeric ASCII value from 0 to 255 Description The Read Status Byte STB query fetches the current contents of the Status Byte Register See the IEEE 488 2 specification for additional information regarding the Status byte Register and its use The layout of the Status Register is Bit 0 Unused Bit 1 Unused Bit 2 Error Queue Has Data Bit 4 Questionable Status Summary not used Bit 5 Message Available Bit 6 Master Summary Status Bit 7 Operatio
30. gt and lt resolution gt are used the aperture is calculated as follows 9 10g expected Iog resolution apperature 10 with a minimum of le 8 and a maximum of five seconds a longer aperture may be set with the SENSe FREQuency APERture command Example Command Query Response Description Related Command CONFigure SENSe 122 VM2164 Command Dictionary www vxitech com MEASure 1 2131 SCALar ARRay FREQuency RATio Purpose This query configures the counter to measure the ratio of the frequencies of the signals on the MEASure suffix input channel and lt second channel gt Type Instrument specific query Command Syntax N A Command Parameters N A RST Value 1 Query Syntax MEASure 1 2 3 SCALar ARRay FREQuency RATio lt array size gt lt second channel gt lt expected value gt lt resolution gt Query Parameters lt array size gt 1 to 1000 If SCALar is specified this parameter is no longer valid If ARRay is specified lt array size gt is a required parameter Query Response This command will modify the following e function set to FREQquency RATio e aperture set to default e aperture events mode set to APERture Description This query configures the counter to measure the ratio of the frequencies of the signals on the MEASure suffix input channel and lt second channel gt The measurement is initiated and the results
31. includes any channels SCALar or ARRay settings and measurements selected Description This command configures a totalized measurement The counter totalizes two selected channels simultaneously Channels 1 and 2 are selected by either lor 2 Channel 1 and the 1 GHz VCO are selected by 10 Channel 2 and the 1 GHz VCO are selected by 20 If either Channel 1 or 2 and the VCO measurement is selected an elapsed time in nanoseconds is provided after the totalized results for the channel Example Command Query Response Description CONF2 ARR NDUT 1000 25 Configures the instrument to take 1000 negative duty cycle measurements with a trigger point of 25 of the signal s peak on Channel 2 CONF1 ARR DCYC 100 50 Configures the instrument to take 100 positive duty cycle measurements with at trigger point of 50 of the signal s peak on Channel 1 CONF1 PHAS Configures the instrument to take a phase measurement from Channel 1 to Channel 2 CONF1 TINT DEL EVEN 100 Configures a time interval with delay measurement form Channel 1 to the 100th edge on Channel 2 CONF10 TOT Sets up the instrument to totalize Channel 1 and the 1 GHz VCO CONF 10 SCAL TOT Returns the set configuration values Related Commands MEASure commands SENSe commands 98 VM2164 Command Dictionary www vxitech com FETCh lt function gt Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query
32. input channel for the numerator the lt second channel gt selects the input channel for the denominator ratios of a channel to itself are always one and the counter will generate an error if programmed to do so lt second channel gt can be 1 2 or 3 When Channel 3 is not being used and the counter Mode is EVENts the lt second channel gt will be used as the input to the EVENts and the other specified input channel will be used as the input to the EVENts counter Example See CONFigure 112 10120 SCALar ARRay TOTalize for example Related Commands MEASure commands SENSe commands 96 VM2164 Command Dictionary www vxitech com CONFigure 11213 SCALar l A RRay PERiod Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command configures the counter to measure the period of the signal on the CONFigure suffix input channel Instrument specific command CONFigure 112 3 SCALar I ARRay PERiod lt array size gt lt expected value gt lt resolution gt lt array size gt 1 to 1000 If SCALar is specified this parameter is no longer valid If ARRay is specified lt array size gt is a required parameter 1 CONFigure N A Returns the current measurement configuration This includes any channels SCALar or ARRay settings and measurements selected
33. length arbitrary block format N A CALibration SECure CODE lt string gt N A Returns the security code The Calibration Security Code command sets the code required to disable calibration security Calibration security must first be disabled before the code can be changed Before shipping the instrument the factory code setting is VM2164 personnel Changing these values incorrectly can cause the Calibration commands should only be executed by qualified instrument to perform improperly Command Query Response Description CAL SEC CODE 16VM2164 Sets the factory code setting of VM2164 CALibration SECure STATe CALibration STORe 82 VM2164 Command Dictionary www vxitech com CALibration SECure STATe P ose Enable or disable calibration security Instrument specific command 0 and A CALibration SECure STATe lt boolean gt lt string gt 0 and Paramete lt boolean gt 0 1 OFF ON lt string gt the code string can be from 1 to 12 ASCII characters in length entered in IEEE 488 2 definite or indefinite length arbitrary block format R alue lt boolean gt ON Que A CALibration SECure STATe Query Paramete N A Query Response Returns the set lt boolean gt value De ptio The Calibration Security State enables or disables the calibration security While security is on no stores to the non volatile memory are allowed In order
34. lt offset gt information must be entered first Command Query Response Description CALC VAR Calculates and returns the variance on a set of data VM2164 Command Dictionary 77 VXI Technology Inc CALibration COSCillator Calibrates the reference oscillator Must have Option 15 or Option 16 installed Instrument specific command CALibration COSCillator lt daclevel gt 0 4095 Values outside of this range are changed to the closest parameter limit i e 6000 is set to 4095 N A CALibration COSCillator N A Returns the set lt dac_level gt parameter value This command calibrates the TCXO Option 15 or the OCXO oscillator Option 16 by adjusting the DAC level when a known user clock is used to calibrate the oscillator personnel Changing these values incorrectly can cause the A Calibration commands should only be executed by qualified instrument to perform improperly Command Query Response Description CAL COSC 2048 Calibrates the oscillator CAL COSC 2048 Returns the calibration value CALibration SECure CODE CALibration SECure STATe 78 VM2164 Command Dictionary www vxitech com CALibration DAC OFFSet Purpose This command calibrates one of two factors used by the DAC Type Instrument specific command Command Syntax CALibration DAC lt dacnum gt OFFSet lt dacoffset gt
35. the TTLTO source ARM DEL le 3 Sets time delay for 0 001 seconds INIT Begins the measurement ARM DEL 1 000000000000000e 03 44 VM2164 Command Dictionary www vxitech com ARM SEQuencel I STARt LA Yer ECOunt Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands Specifies the number of arm signals to count prior to arming the counter Instrument specific command ARM SEQuence1 I STARt LA Yer ECOunt lt event_delay gt lt event delay gt 0 to 65 535 triggers 0 pass though ARM SEQuencel I STARt LA Yer ECOunt N A Returns the current lt event_delay gt parameter value Specifies the number of arm signals to count prior to arming the counter Upon receipt of n arming signals where n is the number specified in the command the counter will be armed to take measurements If a fixed arm source i e HOLD IMMEDIATE CTR_CHAN2 is being used this command will have no effect on the counter arming This command always zeros the delay by time parameter so specifying an event count of zero places the arm subsystem into the pass through mode In this mode the instrument arms immediately upon the receipt of a trigger Command Query Response Description CONF VOLT DC Sets the counter for DC voltage measurement ARM SOUR TTLTO Ar
36. the user As an example these commands are all correct and all have the same effect CALibration SECure CODE lt string gt calibration secure code lt string gt CALIBRATION SECURE CODE lt string gt CAL SECure CODE lt string gt CAL SEC CODE lt string gt cal sec code lt string gt The following command is not correct because it uses part of the long form of CALibration but not all the characters of the long form calib sec code lt value gt incorrect syntax extra ib only cal or calibration is correct All of the SCPI commands also have a query form unless otherwise noted Query forms contain a question mark The query form allows the system to ask what the current setting of a parameter is The query form of the command generally replaces the parameter with a question mark Query responses do not include the command header This means only the parameter is returned no part of the command or question is returned Keywords or parameters enclosed in square brackets are optional If the optional part is a keyword the keyword can be included or left out Omitting an optional parameter will cause its default to be used Parameters are enclosed by angle brackets lt gt Braces or curly brackets are used to enclose one or more parameters that may be included zero or more times A vertical bar I read as or is used to separate parameter alternatives ALPHABET
37. 1 CH2 Count cmorc 2 Countcyiorcmz PERIOD MEASUREMENT Input 1 amp 2 Range 5 ns to 2000 s Resolution A tZ Start Trigger Error Stop Trigger Error Systematic Error Period x Time Base Error we PHASE MEASUREMENT Range 0 to 360 or 180 to 180 Resolution Frequency x 360 x k a la x Trigger Error iP i aes j Systematic Error 360 t t Frequency x 360 x Trigger Error _ Differential Channel Error Period Phase Time TIME INTERVAL MEASUREMENTS Range Resolution Single Shot Systematic Error 2ns to 1x 10 s y t e Start Trigger Error Stop Trigger Error Time Interval x Time Base Error t __ ____ Differential Channel Error Time Interval PULSE WIDTH MEASUREMENT Range Resolution Single Shot Systematic Error Accuracy 5 ns to 20 ms al t 3 Start Trigger Error Stop Trigger Error Trigger Level Timing Error Width x Time Base Error tac Width 1 Resolution Time Base Error x Pulse Width _ Systematic Error x Pulse wit RISE AND FALL TIME MEASUREMENT Range Resolution Single Shot Systematic Error 10 ns to 1000 s y t a Start Trigger Error Stop Trigger Error Trigger Level Timing Error y t Time Intervalx Time Base Error Time Interval 18 VM2164 Introduction www vxitech com
38. 1010 1 2001 The product was installed into a C size VXI mainframe chassis and tested in a typical configuration I hereby declare that the aforementioned product has been designed to be in compliance with the relevant sections of the specifications listed above as well as complying with all essential requirements of the Low Voltage Directive May 2003 C Jerry Patton QA Manager 8 Preface www vxitech com GENERAL SAFETY INSTRUCTIONS Review the following safety precautions to avoid bodily injury and or damage to the product These precautions must be observed during all phases of operation or service of this product Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the product Service should only be performed by qualified personnel TERMS AND SYMBOLS These terms may appear in this manual WARNING Indicates that a procedure or condition may cause bodily injury or death CAUTION Indicates that a procedure or condition could possibly cause damage to equipment or loss of data These symbols may appear on the product A ATTENTION Important safety instructions al Frame or chassis ground WARNINGS Follow these precautions to avoid injury or damage to the product Use Proper Power Cord To avoid hazard only use the power cord specified for this product Use Proper Power Source To avoid electr
39. 139 VXI Technology Inc SOURce COSCillator SOURce Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands The SOURce subsystem commands are used to command the TCXO1 option if available Instrument specific command SOURce COSCillator SOURce lt source gt lt source gt ROSCILLATOR TCXO1 OCXO EXTERNAL ROSCILLATOR TCXO1 with Option 15 installed SOURce COSCillator SOURce N A This query returns the current clock source selected for the counter This command selects the source of the counter reference oscillator Choices are the VM2164 Reference Oscillator ROSCILLATOR the Temperature Controlled Crystal Oscillator TCXO1 the Oven Controlled Crystal Oscillator or an External oscillator source Specifying TCXO1 as a source will generate an error if Option 15 is not available on the VM2164 A similar error will be produced if OXCO is specified and Option 16 is not installed or if an external clock is not connected to the external reference input Command Query Response Description RST Resets the module SOUR COSC TCXO1 140 VM2164 Command Dictionary www vxitech com SOURce COSCillator VALue Purpose This query returns the current oscillator frequency Type Instrument specific query Command Syntax N A Command
40. 2 SECTION AAA OO 23 COMMAND DICTIONARY ri a 23 A NN 23 The SCPI Programming Lanus etapa 23 Not Fee E EA E sub eda tes coeeaessulen ches dad EE A E A E E AE 24 Alphabetical COMME ia 24 Alphabetical Command Listing ii a 25 Alphabetical Command Listing Cont ccceeeesccssecseeceseeseceseccsaeeeeesecsessecnecsacsaeeeesaecaeesesseesecnaeaeseeeeaseaeeneeaes 26 Alphabetical Command Listing Cont Jiss ine A a sd wees 27 Alphabetical Command Listing Cont Jienna ei n e ESE EE E a E ESE REE E ERR RAe 28 Alphabetical Command Listing Cont eseseseseeseesesesesessssesersesesesrestssrseseseetestseseeresterestnsesesestentsenestretsreetsrseresee 29 Command Diction ty sinian cite deh hill tee Bde lee ae oh E E Aisin date 30 TEEE 488 2 COMMON COMMANDS r aa sssaivetss ile da son ips Sits sveessaveoges e e AE Saa Opi ones ESEE Siop ESEE SE EOR TEES ES a 32 O E ERR TE NOA 32 ESB a A dd E E E Me ues 33 TER it 34 DON An 35 POPE A A AA AA ti EIA 36 PR aci caido alcoi td 37 SR a E ERRA 38 STD ii Ai EA eit Ais Heda SET AVA ate bes dd 39 TNG a its lo o dad il dd diia ae 40 A NON 41 A NN 42 VM2164 Preface 3 VXI Technology Inc INSTRUMENT SPECIFIC COMMANDS ssssescsessecssoscnseencoscsessesaccoensesveccossesnseseossessnscsesssonssessssvonsee sssvensesensesonsesenss 43 ABOR NN 43 ARM SEQuencel I STARt LA Yer DEL ay cee eeececsseceneece ceeeeececaceeseeeceaeeseaeeeseaeeeneeceaeeeeneecsaeeeeneeee 44 ARM SEQu
41. 6 156 VM2164 Calibration and Verification www vxitech com 1 1 1 2 1 3 1 4 1 5 Remove the sheet metal enclosure surrounding the VMIP module that contains the VM2164 to be calibrated Install the module in a VXI chassis so that the adjustment points and test points are readily accessible After powering up the VXI chassis and the associated computer controlling the chassis set up the VM2164 for the following settings Setting Command CH 1 Input Impedance 1 MQ INP1 IMP le6 CH 2 Input Impedance 1 MQ INP2 IMP le6 CH 1 Coupling DC INP1 COUP DC CH 2 Coupling DC INP2 COUP DC CH 1 Attenuator Minimum INP1 ATT MIN CH 2 Attenuator Minimum INP2 ATT MIN Adjust the function generator for 0 0 V offset and a 6 0 Vp p sine wave at 1 kHz Note that the function generator will be set to 3 0 Vp p because it expects a 50 Q load which is not provided Connect the function generator to the VM2164 Channel 1 Input Set the oscilloscope to the 10 mV range and probe TP3 on the VM2164 Note that there are four test points used in this section of the procedure and each has a square pad that is the measurement point and an adjacent round pad which is a ground return Using the wider blade end of the adjustment screwdriver adjust R99 to null out the signal at TP3 Note that using the narrow blade can damage the potentiometer The resulting signal should have a peak to peak amplitude of less than 2 mV and a DC offs
42. 62 logical address oooooonoccnncnnoconcnnncnnononanocnconoconocn nos 21 22 Cal indi 10 lower threshold value ooooonocnncnnnnnonnconnncanconocnnonn 64 Calibration oooononcccnnnoncccnonanaconnnnnnos 14 156 157 166 lowpass filter sessen iiien iieii ere 110 calibration constants ooonconcnoncnonoccnonconcnncnccnncnnonccnns 14 calibration DACS oooonoccnccconononononnonnnonorononaonorononccnno 14 M CALibration SECurity STATe dooooooncnocnnonnconcnnnconnonns 83 memory buffer cecceeeeee 60 66 67 68 69 77 CALibration STORE ooooconoonccnnnoncccnonanccnonnnanccnonos 81 84 memory VALUES ceeeceesseeeeeeeeeeeeeeeeeeee 66 68 69 77 comparator Slopes cecceeseeseeeeeteeeees 137 138 139 MEMOTLY_INEX seseris ian eia i 64 CONtINUOUS MeasUreMENtS coooccccoccnnconanonnnonononnconononos 103 message based i essies sieecssysosdcatassesssessessisseseeys 14 23 COONS innata ope 21 Mmiulti Sistial sic ss sled eeaeee i ea 13 cooling SY Sicilia 21 multitasking System coooocnconoconononnnnncnncnncnnnonananonc no 100 ESTE o pee be Alea ae etek aA Ay 13 current trigger SEQUENCE s s s 103 104 N D negative duty cycle oocooccnocncccocconconcnnnnnnnnncnnon 89 116 data values 14 61 63 64 65 66 67 68 69 77 o delayable trigger ooooconiconncnnnnnnccnccnocncconccnnconnonnos 51 58 Ost Voltage dns 112 disarming the Counter c ccooncccocccccononnccnconononancnnnos 53 54 OS cc een ies EENE i ie 55 duty cy
43. All data points above 5 0 kHz and below 1 0 kHz are targeted CALC LIM ENV 1000 5000 Returns the envelope threshold value CALC LIM ENV 5000 1000 Sets an envelope value All data points between 5 0 kHz and 1 0 kHz are targeted CALC LIM ENV 5000 1000 Returns the envelope threshold value CALCulate LIMit FCOcunt DATA CALCulate LIMit REPort DATA VM2164 Command Dictionary 61 VXI Technology Inc CAL Culate LIMit FCOunt Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This query returns the number of data points that failed a limit test Instrument specific query N A N A N A CAL Culate LIMit FCOunt N A This query returns the number of data points outside of a defined threshold This query performs a limit test on the current available data and returns the number of data points that failed a limit test Note A CALCulate LIMit UPPer or LOWer or ENVelope command must be sent before this query Command Query Response Description CALC LIM UPP 5000 Sets the upper threshold value CALC LIM FCO Returns the number of data points outside of a defined threshold 62 VM2164 Command Dictionary www vxitech com CAL Culate LIMit LOWer DATA pose Searches for all the input d
44. Calibrates one of three factors used by the TEC circuitry CALibration TINTerval OFFSet This command compensates for the differences between Channel and x Channel 2 oug ASopouYyoa L XA Areuoroiq puewuop y9 1 ZIAA LT ALPHABETICAL COMMAND LISTING CONT CONFigure 112 SCALar I ARRay NDUTy cyclelPDUTCyclelDCYCle Description This command configures a positive or negative duty cycle measurement RST RST Value Array size X Deycle Reference 50 CONFigure 112 SCALar ARRay NWIDth PWIDth This command configures the counter to measure the positive or negative pulse Array size 1 width time of the signal on the CONFigure suffix input channel Deycle Ref 50 CONFigure 112 SCALar ARRay PHASe This command configures a phase measurement 1 CONFigure 112 SCALar I ARRay RTIMelFTIMe RISE TIMEIFALL TIME This command configures the counter to measure the rise or fall time of the Array size 1 signal on the CONFigure suffix input channel xX Low Reference 10 High Reference 90 CONFigure 112 SCALar I ARRay TINTerval This command sets the counter to make a time interval measurement 1 CONFigure 112 SCALar l ARRay VOLTage These commands configure the counter to measure the voltage on the x 1 CCONFigure suffix input channel CONFigure 11213 SCALar ARRay FREQuency This command config
45. EC offset by issuing command CAL TEC OFFS amp Store offset value in non volatile memory by issuing command This process fine adjust for counter timer Set Function Generator as below Square Wave Function Frequency 10 MHz Amplitude 3V DC offset OV Phase 0 Measure frequency of function generator by issuing command RI Str K3 CAL STORE EAD and save as freq phase Find the Minimum and Maximum frequencies and save in FreqMin and FreqMax Get the X counter value by issuing command MFGTEST 0 and save in XCNTR phase Get the Y counter value by issuing command MFGTEST 1 and save in YCNTR phase Get the Start TEC value by issuing command MFGTEST 2 an d save in TECA phase Get the Stop TEC value by issuing command MFGTEST 3 and save in TECB phase Find the start point and stop point save as phasestart and phasestop Get the TEC StartTec constant by issuing command CAL TEC and CALStar1 STAR and save in CALSTAR Get the TEC StopTec constant by issuing command CAL TEC STOP and save in CALSTOP and CALStop1 Get the TEC offset constant by issuing command CAL TEC OF Set phase phasestart FSET and save in CALOFFS VM2164 Calibration and Verification 163 VXI Technology Inc 3 65 Set SumX 0 SumY 0 SumX Y 0 scount 1 SumXX 0 SumYY 0 3 66 Set SumX SumX
46. EFault is included the default impedance is returned This command sets input terminating impedance for the specified channel If lt impedance gt is less than 60 the impedance is set to 50 Q If lt impedance gt is greater than 60 the impedance is set to 1e6 Q 1 MQ Command Query Response Description VM2164 Command Dictionary 111 VXI Technology Inc INPut 112 SETup Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command sets up Input Channel 1 or 2 by specifying an expected peak to peak input voltage and optionally an expected input offset voltage Instrument specific command INPut 1I2 SETup lt expected PTP gt lt expected offset gt N A N A N A N A N A This command sets up Input Channel 1 or 2 by specifying an expected peak to peak input voltage and optionally an expected input offset voltage The counter will set the input channel attenuation offset and gain to settings that would center the expected signal in 80 of the comparator range Both comparators slope is set to POSitive level to O V and hysteresis to MAXimum Command Query Response Description 112 VM2164 Command Dictionary www vxitech com INPut 1 2 SETup AUTO Purpose Type Command Syntax Command Parameters RST Val
47. ICAL COMMAND LISTING The tables on the pages that follow provide an alphabetical listing of each command supported by the VM2164 Counter Timer along with a brief definition If an X is found in the column titled RST Reset then the value or setting controlled by this command is possibly changed by the execution of the RST command If an X is not found then the RST has no effect The RST value is provided with each command This value is set when the unit is powered up or when an RST or a RESet command is executed Note that calibration values revert to the values stored in non volatile memory upon reset Using the CALibration DEFault command will return calibration values back to known factory preset values In order for CALibration commands queries to be executed calibration security must be turned off If security is not turned off a 203 Command Protected error will be returned See CALibration SECure CODE for information on calibration security 24 VM2164 Command Dictionary Areuonoiq PURO y9TZIAA ST CLS ALPHABETICAL COMMAND LISTING Description Clears all status and event registers RST Value ESE Sets the bits of the Event Status Enable Register ESR Queries and clears the Standard Event Status Register IDN Queries the module for its identification string OPC Sets the OPC bit in the Event Status Register RST Resets the module s hardware and softwar
48. LTRGO TTLTRGO TTLTRGO TTLTRG7 ARM SEQuence2I STOP LA Yer SOURce ARM SEQuence2I STOP LA Yer SOURce CATalog ALL ARM SEQuence2I STOP LA Yer SOURce CATalog FIXed 58 VM2164 Command Dictionary www vxitech com ARM SEQuence2 STOP LAYer SOURce CATalog FIXed Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands Lists all fixed trigger sources available for use with the ARM STOP SOUR command Instrument specific query N A N A N A ARM SEQuence2I STOP LAYer SOURce CATalog FIXed N A HOLD IMMEDIATE INTERNAL LEVEL Lists all fixed trigger sources available for use with the ARM STOP SOUR command This command specifies the stop arming source for the counter Command Query Response Description ARM STOP SOUR CAT FIX HOLD IMMEDIATE INTERNAL LEVEL ARM SEQuence2I STOP LA Yer SOURce ARM SEQuence2I STOP LA Yer SOURce CATalog ALL ARM SEQuence2I STOP LA Yer SOURce CATalog DELayable VM2164 Command Dictionary 59 VXI Technology Inc CALCulate A VERage Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This query calculates the average of a specified number of measurem
49. N 5 Sets the number of data to use in a histogram calculation to 5 CALC TRAN HIST COUN 5 000000000000000e 00 Returns the number of data points to use in a histogram calculation Related Commands 72 VM2164 Command Dictionary www vxitech com CALCulate TRANsform HISTogram POINts Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands Sets the number of intervals in a histogram calculation Instrument specific command CAL Culate TRANsform HISTogram POINts lt numeric_value gt lt numeric_value gt 1 6 1 CAL Culate TRANsform HISTogram POINts N A Returns the number of intervals in a histogram calculation This command sets the number of intervals in a histogram calculation If a data value is exactly the same value as a limit dividing two bins the data value will be counted in the next bin i e 25 is placed in Bin 5 unless the value matches the last interval limit i e 35 is placed in Bin 6 The reference table below delineates the limits for each bin BIN LIMITS 1 5 10 10 15 15 20 20 25 25 30 30 35 Win BR Ww tr Command Query Response Description CALC TRAN HIST POIN 3 Sets the number of intervals in a histogram calculation to 3 CALC TRAN HIST POIN 3 000000000000000e 00 Returns the numb
50. NT DEL SENS TINT DEL EVEN MIN 7 EVEN Sets event delay to minimum 1 Queries event delay VM2164 Command Dictionary 135 VXI Technology Inc SENSe TINTerval DELay TIME Purpose This command sets the delay time for time interval with delay by time function Instrument specific command 0 and A SENSe TINTerval DELay TIME lt time delay gt 0 and Paramete lt time delay gt le 9 to le6 R alue le 6 Que a SENS TINT DEL TIME Query Paramete N A Query Response Returns the current value of the time interval delay by time function of the default minimum or maximum value De 0 This command sets the delay time for time interval with delay by time function Command Query Response Description SENS TINT DEL TIME le3 Sets time delay to 1000 SENS TINT DEL TIME 1 000000000000000e 03 136 VM2164 Command Dictionary www vxitech com SENSe 112 FUNCtion Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command selects a function and input channel without changing most of the setup of the counter Instrument specific command SENSe 1 2 FUNCtion DCYCLe FALL TIME FTIMe NDUTycycle NWIDth PDUTycycle PHASe PWIDth RISE TIME RTIMe
51. Nsform HISTogram BELow Purpose This query returns the number of points below the minimum value in a histogram calculation Type Instrument specific query Command Syntax N A Command Parameters N A RST Value N A Query Syntax CALCulate TRANsform HISTogram HISTogram BELow Query Parameters N A Query Response N A Description Returns the number of points below the minimum value in a histogram calculation Example Command Query Response Description CALC TRAN HIST RANG AUTO OFF CALC TRAN HIST RANG AUTO 10 50 CALC TRAN HIST BEL Turns off auto ranging Sets the range of the histogram calculation for 10 50 Returns the number of data points below 10 Related Commands VM2164 Command Dictionary 71 VXI Technology Inc CAL Culate TRANsform HISTogram COUnt Purpose Determines the number of data points to include in a histogram calculation Type Instrument specific command Command Syntax CAL Culate TRANsform HISTogram COUnt lt numeric_value gt Command Parameters lt numeric_value gt RST Value 1 Query Syntax CAL Culate TRANsform HISTogram COUNt Query Parameters N A Query Response Returns the number of points in a histogram calculation Description This command determines the number of data points to include in a histogram calculation Example Command Query Response Description CALC TRAN HIST COU
52. Parameters Query Response Description Example Related Commands This query returns the values of measurements Instrument specific query N A N A lt count gt the greatest measurement requested for the array lt start gt 1 lt step gt FETCh lt function gt lt function gt DCYCle FALL TIME FREQuency FREQuency RATio FTIMe NDUTycycle PDUTycycle NWIDth PWIDth PHASe PERiod RISE TIME RTIMe TINTerval TINTerval DELay AC DC MINimum MAXimum PTPeak lt count gt 1 to 1000 lt start gt 1 to 1000 lt step gt 1 to 1000 See Description If a single measurement is made the format of the returned value is e niannnnnnnnnnnmmnesxx lt 1f gt If an array measurement is made the format of the returned values is e abbrn nnnnnnnnnnnnnnnesxx rn nnnnnnnnnnnnnnesxx m nnnnnnnnnnnnnnnesxx lt 1f gt where e a number of b digits e b number of characters in the returned data not including abb e r space or e n value e s or e xx exponent The default value of the lt count gt parameter is the number of measurements requested for the array The default value of lt start gt is 1 The default value of lt step gt is 1 The number of values returned is lt count gt The first of the values returned is value lt start gt Then every lt step gt values after start are returned If a CONFigure command is made measure fr
53. Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Command This query configures the counter to measure the rise and or fall time of the signal on the MEASure suffix input channel Instrument specific query N A N A lt array size gt 1 lt low reference gt 10 lt high reference gt 90 MEASure 112 SCALar l ARRay RTIMelFTIMe lt array size gt lt low reference gt lt high reference gt lt expected value gt lt resolution gt lt array size gt 1 to 1000 If SCALar is specified lt array size gt is not a valid parameter If ARRay is specified lt array size gt is a required parameter lt low reference gt 10 to 90 lt high reference gt 10 to 90 This command will modify the following e function set to TRIMe or FTIMe e aperture described below e aperture events mode set to APERture If auto setup mode is ON or ONCE the input channel attenuation offset gain level and slope can be modified This query configures the counter to measure the rise and or fall time of the signal on the MEASure suffix input channel The measurement is initiated and the result is placed in the output buffer The units of the lt low reference gt and lt high reference gt are percentage The units of lt expected value gt and lt resolution gt are seconds If the lt expected value gt argument is used the expected pe
54. Parameters N A RST Value N A Query Syntax SOURce COSCillator VALue Query Parameters N A Query Response Returns the current oscillator frequency Description This query returns the current oscillator frequency Example Command Query Response Description SOUR COSC VAL 9 999999999999900e 06 Related Commands VM2164 Command Dictionary 141 VXI Technology Inc TEST Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Command This command performs an internal communication test Instrument specific query N A N A N A TEST N A See Description This command performs and internal communication test where a 16 bit BUS is checked If a O is returned the test is passed If a non zero number is returned the test has failed Command Query Response Description TEST 0 Indicates that the test is passed TST 142 VM2164 Command Dictionary www vxitech com TEST ALL Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Command The Test subsystem handles the self test operations of the instrument Instrument specific query N A N A N A TEST ALL N A Retu
55. Put SETup AUTO will be set to ONCE If a reference value is not specified the input channel comparator 1 level will be set to 0 25 V and input channel comparator 2 level will be set to 0 25 V for a rise time measurement For fall time the reverse is set This command will modify the following e function set to RTIMe or FTIMe e aperture described below e aperture events mode set to APERture The input channel attenuation offset gain level and slope can be modified If neither of the optional arguments are used e aperture is set to the default value If only the lt expected value gt argument is used e aperture is set to the default value If both lt expected value gt and lt resolution gt are used the aperture is calculated as follows appera ture 1 y A og expectea log resolution with a minimum of 1e 8 and a maximum of 5 seconds A longer aperture may be set with the SENSe APERture command See CONFigure 112110120 SCALar l ARRay TOTalize for example MEASure commands SENSe commands 92 VM2164 Command Dictionary www vxitech com CONFigure 112 SCALar ARRay TINTerval Purpose This command sets the counter to make a time interval measurement Type Instrument specific command Command Syntax CONFigure 112 SCALar ARRay TINTerval lt array size gt lt expected value gt lt resolution gt Command Parameters lt array size gt 1 to 1000 If SCALar
56. Rce CATalog DELayable ARM SEQuence 1 I STARt LA Yer SOURce CATalog FIXed VM2164 Command Dictionary 49 VXI Technology Inc ARM SEQuencel I STARt LA Yer SOURce CA Talog ALL Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands Lists all trigger sources available for use with the ARM SOUR command Instrument specific query N A N A N A ARM SEQuencel I STARt LAYer SOURce CATalog ALL N A BUS COUNTER CTR_EXTARM TTLTRGO TTLTRG1 TTLTRG2 TTLTRG3 TTLTRG4 TTLTRGS TTLTRG6 TTLTRG7 HOLD IMMEDIATE CTR_CHAN2 Lists all trigger sources available for use with the ARM SOUR command Specifies the start arming source for the counter Command Query Response Description ARM SOUR CAT CONF FREQ ARM SOUR BUS INIT FETC COUN TRIG FETC COUN FETC BUS COUNTER CTR_EXTARM TTLTRGO TTLTRG1 TTLTRG2 TTLTRG3 TTLTRG4 TTLTRGS TTLTRG6 TTLTRG7 HOLD IMMEDIATE CTR_CHAN2 Configures the counter to read frequency Arms the BUS source Begins the measurement 0 1 1 234567890000000e 06 ARM SEQuence I STARt LA Yer SOURce ARM SEQuence1 I STARt LA Yer SOURce CATalog DELayable ARM SEQuencel I STARt LA Yer SOURce CATalog FIXed 50 VM2164 Command Dictionary www v
57. Related Command The SENSe FUNCtion command selects a function and input channel without changing most of the counter setup Instrument specific command SENSe 11213 FUNCtion TOTalize FREQuency FREQuency RATio lt second channel gt PERiod N A SENSe 11213 FUNCtion N A This query moves the currently selected function to the output buffer Functions are selected by a SENSe FUNCtion CONFigure or MEASure command The SENSe FUNCtion command selects a function and input channel without changing most of the counter Setup The input filtering coupling and impedance are not changed by these commands The filtering coupling and impedance that is appropriate for the input signal must be selected The input attenuation offset gain and comparator hysteresis are not changed by these commands The comparator slopes and thresholds however are changed to defaults by these commands If INPut SETup AUTO autotrigger is set to ON or ONCE the input attenuation offset gain and comparator hysteresis my change when the measurement is started See the CONFigure or MEASure command descriptions The possible parameters for this command are listed above Command Query Response Description SENS1 FUNC FREQ Sets function to frequency SENS FUNC FREQ Queries set function CONFigure 138 VM2164 Command Dictionary www vxitech com SENSe 112110120
58. SCALar ARRay NDUTycyclelDCYCLE lt dcycle reference gt lt expected gt lt array size gt lt expected value gt lt resolution gt 0 and Paramete lt array size gt 1 to 1000 If SCALar is specified this parameter is no longer valid If ARRay is specified lt array size gt is a required parameter lt dcycle reference gt 10 to 50 R alue lt array size gt 1 lt dcycle reference gt 50 Que a CONFigure Que Para ate N A Query Response Returns the current measurement configuration This includes any channels SCALar or ARRay settings and measurements selected De 0 This command configures a positive or negative duty cycle measurement The reference is the percent of the signals peak value i e the percent of the peak to peak value as measured from the signals minimum This command will modify the following e function set to PDUT or NDUT e aperture described below e aperture events mode set to APERture The input channel attenuation offset gain level and slope can be modified If neither of the optional arguments are used e aperture is set to the default value If only the lt expected value gt argument is used e aperture is set to the default value If both lt expected value gt and lt resolution gt are used the aperture is calculated as follows appera ture 1 0 9 10g expected log resolution with a minimum of le 8 and a maximum of 5 seconds A longer apert
59. SOURce lt source gt lt source gt BUS TTLTRGO TTLTRG1 TTLTRG2 TTLTRG3 TTLTRG4 TTLTRGS TTLTRG6 TTLTRG7 HOLD IMMEDIATE CTR_EXTARM INTERNAL LEVEL IMMEDIATE ARM SEQuence2I STOP LA Yer SOURce N A BUS TTLTRGO TTLTRG1 TTLTRG2 TTLTRG3 TTLTRG4 TTLTRGS TTLTRG6 TTLTRG7 HOLD IMMEDIATE CTR_EXTARM INTERNAL LEVEL This command selects or queries the stop arming source to be used when the counter is initiated Command Query Response Description ARM SEQuence2I STOP LA Yer SOURce CATalog ALL ARM SEQuence2I STOP LA Yer SOURce CA Talog DELayable ARMC SEQuence2I STOP LA Yer SOURce CATalog FIXed 56 VM2164 Command Dictionary www vxitech com ARM SEQuence2I STOP LA Yer SOURce CA Talog ALL Purpose Lists all trigger sources available for use with the ARM STOP SOUR command Type Instrument specific query Command Syntax N A Command Parameters N A RST Value Same as Query Response Query Syntax ARM SEQuence2I STOP LA Yer SOURce CATalog ALL Query Parameters N A BUS COUNTER CTR_EXTARM TTLTRGO TTLTRG1 TTLTRG2 TTLTRG3 TTLTRGA TTLTRGS TTLTRG6 TTLTRG7 HOLD IMMEDIATE INTERNAL LEVEL Query Response Description Lists all trigger sources available for use with the ARM STOP SOUR command This command specifies the stop arming source for the counter Example Command Query Res
60. StartTecSlope M2 StopTecSlope Repeat step 3 18 for all data in the previous text file Calculate the average frequency and save as freqavg If freqavg lt 10 MHz and sweep 0 then set K3low 0 000000005 If freqavg gt 10 MHz and sweep 1 then save K3 as K3high If freqavg is greater than 10 MHz and sweep 0 then K3 is decrement by adjust 0 0000001 Set adjust adjust 1 5 Repeat steps 3 20 through 3 24 for 1000 times Set sweep 1 and K3 K3high K3low 2 VM2164 Calibration and Verification 161 3 27 3 28 3 29 3 34 3 40 3 41 3 42 3 43 3 44 VXI Technology Inc Recalculate the frequency with new K3 XCount F 4 Count x 0 000001 StartTec x M1 StopTech x M2 K3 where M1 StartTecSlope M2 StopTecSlope Repeat step 3 27 for all data in the previous text file Calculate the average frequency and save as freqavg If freqavg is less than 10 MHz 0 004 or greater than 10 MHz 0 004 then the UUT fails TEC calibration test Disable security by issuing command CAL SEC STAT 0 0VM2164 Optional Set the TEC StartTec by issuing command CAL TEC STAR amp Str M1 0 000000001 Optional Set the TEC StopTec by issuing command CAL TEC STOP amp Str M2 0 000000001 Optional Set the TEC offset by issuing command CAL TEC OFFS amp Str K3 0 000000001 Optional Set Function Generator as b
61. Syntax INPut 1 2 COMParator 112 SLOPe lt slope gt DEFault Command Parameters lt slope gt POSitive or NEGative Default POSitive RST Value POSitive Query Syntax INPut 112 COMParator 1 2 SLOPe DEFault Query Parameters N A Query Response Without one of the optional parameters this query returns the current setting of the slope for the selected input channel and comparator If the optional argument is used the default value for the slope is returned Description This command sets the slope for the selected input channel and comparator The slope may be either positive or negative Example Command Query Response Description Related Commands VM2164 Command Dictionary 107 VXI Technology Inc INPut 1 2 COUPling Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command sets the input block signal coupling for the specified channel AC or DC Instrument specific command INPut 1 2 COUPling lt coupling gt DEFault lt coupling gt AC or DC Default AC AC INPut 112 COUPling DEFault N A Without the optional parameter this command returns the current setting of the input block signal coupling for the specified channel If the optional argument DEFault is included the default coupling is returned Th
62. This command configures the counter to measure the period of the signal on the CONFigure suffix input channel The units of lt expected value gt and lt resolution gt are seconds This command will modify the following e function set to PERiod e aperture described below e aperture events mode set to APERture If autosetup mode is ON or ONCE the input channel attenuation offset gain level and slope can be modified If neither of the optional arguments are used e aperture is set to the default value If only the lt expected value gt argument is used e aperture is set to the default value If both lt expected value gt and lt resolution gt are used the aperture is calculated as follows apperature 2 1 0H Hoe expected log resolution with a minimum of le 8 and a maximum of 5 seconds A longer aperture may be set with the SENSe FREQuency APERture command See CONFigure 112110 20 SCALar ARRay TOTalize for example MEASure commands SENSe commands VM2164 Command Dictionary 97 VXI Technology Inc CONFigure 112 10120 SCALar l ARRay TOTalize Purpose This command configures a totalized measurement Type Instrument specific command Command Syntax CONFigure 112 101201 SCALar ARRay TOTalize Command Parameters N A RST Value N A Query Syntax CONFigure Query Parameters N A Query Response Returns the current measurement configuration This
63. UENCY rn E E EE a AET asrsisn s 109 INPut 112 FILTer STATE DEF lic a biie 110 INPut 112 IMPed nce DEF Gutes Eco sli a ai dr din Baad Atanas ante da 111 INPitt 112 SETUP eiii add 112 INPut 112 SETOp AUT O eaea ee iii anidar anida 113 INPuthtl2 SECO AUTO MIME Ea 114 INPut 112 T SETOp TlMesc citadas ti dd tallada dat idids 115 MEASure 112 SCALar l ARRay DCYCleINDUTycyclelPDUT ycycle docococnocinococonononocanoncnononcconanonanaconos 116 MEASure 112 SCALar l ARRay NWIDthIPWIDth 00 0 ee eecceecceseeeee caeceeeceeecaeeeneesseeeeeeeeesaeeereeeeneeeas 117 MEASure 1 2 SCALar l ARRay PHAS cceeccesceesecsceesececeeseeeeeeceeeceseeeeecseeeecesaecnaecneecaeeeneeeneeneeeneess 118 MEASure 112 SCALar l ARRay RTIMelFTIMelIRISE TIMEIFALL TIME ccccesecesecseeeeeeneeeneeenees 119 MEASure 1 2 SCALar l ARRay TINTerval c ccecccscecssessecseceesceeecesecesecaeeeaeceeceaeecaeecaeeeaeeeneeeeeeereeetees 120 MEASure 1 2 SCALar l ARRay VOLTage lt volt_func gt cc ccceecceeseeesceseeeecceseeeseceeceeecneeeseeeneceeeeeees 121 MEASure 11213 SCALar l ARRay FREQueNCY cccccceescesseesscesceeeceeeceaeceneceeecaeeeaeeesecaeeceseeereseeeseenseenas 122 MEASure 11213 SCALar l ARRay FREQuency RATI0 oo ceccesceessesseeeseeeceseeceseceaeeaecaecaeecaeesaeceeeeneeenens 123 MEASure 11213 SCALar l ARRay PERi0d 0 ecescceseesceeseceseceneesecesccesecesecaeenaecnecanecae
64. UTPut TTLTrg STATe This command toggles the use of TTL trigger lines as usable outputs X ON READ This query causes an INITiate IMMediate action and a FETCh query RESet Resets the module s hardware and software to a known state SENSe APERture This command sets the counter measurement aperture lt time gt X 0 100000 SENSe COUNt This command sets the counter to do lt array size gt number of measurements X 1 SENSe EVENts This command sets the counter lt of events gt X 1000 SENSe MODe This command sets the counter to make a measurement for a length of time x APER APERture or for a number of cycles of the input signal EVENTS SENSe 1 2 FUNCtion This command selects a function and input channel without changing most of x FREQ the setup of the counter SENSe 11213 FUNCtion The SENSe FUNCtion command selects a function and input channel without x FREQ changing most of the counter setup SENSe 112 10120 FUNCtion The SENSe FUNCtion command selects a function and input channel without changing most of the counter setup oug ASopouYyoA L XA Arevorjoiq purwwoD y9TZIAA 6T SOURce COSCillator SOURce ALPHABETICAL COMMAND LISTING CONT Description The SOURce subsystem commands are used to command the TCXO1 option ifl RST RST Value ROSC if Option 15 is used available x then TCXO1 is returned SOURce COSCillator VALue This query returns the current oscillator frequency
65. XX exponent Command Query Response Description FETC ARR DC 10 3119 2 5712e 01 1 5392e 02 1 0252e 02 2 5642e 02 9 7442e 01 3 0777e 01 2 2567e 02 2 5647e 02 9 7447e 01 3 0777e 01 CONFigure commands SENSe commands 102 VM2164 Command Dictionary www vxitech com INITiate CONTinuous Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands Verifies whether the counter is taking continuous measurements Instrument specific command INITiate CONTinuous N A N A INITiate CONTinuous N A Returns 0 if the counter is not taking continuous measurements Returns 1 if the counter is taking continuous measurements Measurements are continuously made until a RST or ABORt command is used while the counter is continuously making measurements the FETCh command may be used to return the results of the most recently completed measurement Initiates its current trigger sequence After the instrument has completed the current trigger sequence it re enters the initiated state It will continue this cycle until an abort reset or INIT CONT OFF is received Command Query Response Description INIT CONT INIT CONT 1 READ MEASure ARM VM2164 Command Dictionary 103 VXI Technology Inc INITiate IMMediate Purpose This
66. a to be written in the associated bit of the corresponding event register Note that 32767 is the maximum value returned as the most significant bit of the register cannot be set true Examples Command Query Response Description STAT PRES Related Commands N A VM2164 Command Dictionary 147 VXI Technology Inc STATus OPERation PTR Purpose Sets the positive transition filter Type Required SCPI command Command Syntax STATus OPERation PTR Command Parameters N A RST Value N A Query Syntax STATus OPERation PTR Query Parameters N A Query Response N A Description Sets the positive transition filter Setting a bit in the positive transition filter shall cause a O tol transition in the corresponding bit of the associated condition register to cause a to be written in the associated bit of the corresponding event register Note that 32767 is the maximum value returned as the most significant bit of the register cannot be set true Examples Command Query Response Description STAT OPER PTR Related Commands N A 148 VM2164 Command Dictionary www vxitech com STATus OPERation EVENt Purpose Queries the Operation Status Register s event register Type Required SCPI query Command Syntax N A Command Parameters N A RST Value N A Query Syntax STATus OPERation EVENt Query Parameters N A Query Respo
67. a reference value is specified and INPut SETup AUTO is set to OFF INPut SETup AUTO will be set to ONCE If a reference value is not specified the input channel comparators 1 and 2 levels will be set to 0 V The input channel attenuation offset gain level and slope can be modified if the optional arguments lt expected value gt and lt resolution gt are not used e aperture is set to the default value If only the lt expected value gt argument is used e aperture is set to the default If both lt expected value gt and lt resolution gt are used the aperture is calculated as follows apperature 1 y 69 oe expected log resolution with a minimum of le 8 and a maximum of five seconds A longer aperture my be set with the SENSe PWIDth APERture command Command Query Response Description CONFigure SENSe VM2164 Command Dictionary 117 VXI Technology Inc MEASure 1 2 SCALar ARRay PHASe Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Command This query performs a phase measurement Instrument specific query N A N A 1 MEASure 112 SCALar l ARRay PHASe lt array size gt lt expected value gt lt resolution gt lt array size gt 1 to 1000 If SCALar is specified lt array size gt is not a valid parameter If ARRay is specif
68. alue of zero The first point of memory is 1 e The CALCulate LIMit UPPer LOWer or ENVelope command must be sent before sending this query Command Query Response Description CAL LIM UPP 5000 Sets lt threshold2 gt value CALC LIM REP 2 6002 0 5 5001 0 Returns the number of data points and data values outside of the defined threshold 64 VM2164 Command Dictionary www vxitech com CAL Culate LIMit UPPer DATA Purpose Searches for all the input data values above a certain lt threshold gt Type Instrument specific command Command Syntax CAL Culate LIMit UPPer DATA lt threshold gt OEO E EEG lt threshold gt 9 989999999999990e 99 to 9 989999999999990e 99 RST Value 9 989999999999990e 99 Query Syntax CALCulate LIMit UPPer DATA Query Parameters N A Query Response Returns the lt threshold gt value Description This command searches for all the input data values above a certain lt threshold gt Example Command Query Response Description CALC LIM UPP 5 0 Sets the lt threshold1 gt value CALC LIM UPP 5 000000000000000e 00 Returns the lt threshold1 gt value Related Commands VM2164 Command Dictionary VXI Technology Inc CAL Culate MAXimum Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description E
69. and IEEE STD 488 2 compatible VXIplug amp play drivers are also provided to further ease programming CALIBRATION The calibration constants used to correct the data values are stored in non volatile memory and are password protected for security These constants are determined when the instrument is calibrated and can be changed as necessary These constants may also be queried at any time via a word serial query and altered via a word serial command with the password All calibration is done using calibration DACs to adjust the gain and offset of each channel This eliminates the need for removing covers from the unit and allows for automated calibration CHANNEL 3 INPUT Optional CHANNEL 1 INPUT CHANNEL 2 INPUT EXTERNAL REFERENCE OUTPUT EXTERNAL REFERENCE INPUT EXTERNAL ARM INPUT FIGURE 1 2 FRONT PANEL LAYOUT VM2164 Introduction www vxitech com BUILT IN SOFTWARE FUNCTIONS BUILT IN SOFTWARE FUNCTIONS e Auto Level e Period e Positive Pulse Width e Positive Duty Cycle e Rise Time e Burst Characterization e Clock On Off In Out e Pulse Characterization e Frequency e Negative Pulse Width e Burst Frequency Fall Time BIT Built In Test FEATURES FEATURES FREQUENCY Frequency Frequency Ratio Frequency in Bursts Channel 3 PERIOD AND TIME Period Single Period Average Positive Pulse Width Negative Pulse Width Rise Time Fall Time Time I
70. annel 1 and connect Synthesizer Function Generator signal to UUT Channel 1 through cable BNC plug to SMB plug Configure the Counter Timer as below Channel 1 Configuration Frequency measurement by issuing command CONF 1 FREQ Input impedance 50 Q by issuing command INP1 IMP 50 Input AC Coupling by issuing command INP1 COUP AC Turn off filter by issuing command INP1 FILT 0 Turn off Auto Trigger by issuing command INP1 SETUP AUTO OFF Set Trigger Level to 0 V by issuing command INP1 COMP LEVEL 0 Channel 2 Configuration Frequency measurement by issuing command CONF 2 FREQ Input impedance 50 Q by issuing command INP2 IMP 50 Input AC Coupling by issuing command INP2 COUP AC Disable filter by issuing command INP2 FILT 0 Disable Auto Trigger by issuing command INP2 SETUP AUTO OFF Set Trigger Level to 0 V by issuing command INP2 COMP LEVEL 0 Configure the Function Generator as below Square Wave Function Frequency 10 MHz Amplitude 3V DC offset OV Phase 0 Get the X counter value by issuing command MFGTEST 0 and save in NewX Get the Y counter value by issuing command MFGTEST 1 and decrement by 1 and save in NewY Get the Start TEC value by issuing command MFGTEST 2 and save in StartTec Get the Stop TEC value by issuing command MFGTEST 3 and save in StopTec Repeat steps 3 4 through 3 7 for 3000 readings and record data of NewX
71. are placed in the output buffer Ratio lt expected gt and lt resolution gt are accepted but are not used If autosetup mode is ON or ONCE the input channel attenuation offset gain level and slope can be modified The SENSe suffix selects the input channel for the numerator The lt second gt selects the input channel for the denominator Ratios of a channel to itself are always one and the counter will generate an error if programmed to do it The lt second channel gt can be 1 2 or 3 When Channel 3 is not being used and the counter mode is EVENts the other specified input channel will be used as the input to the EVENts counter Example Command Query Response Description Related Command CONFigure SENSe VM2164 Command Dictionary 123 VXI Technology Inc MEASure 11213 SCALar ARRay PERiod Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Command Configures the counter to measure a period of the signal on the MEASure suffix input channel Instrument specific query N A N A 1 MEASure 1 2 3 SCALar ARRay PERiod lt array size gt lt expected value gt L lt resolution gt lt array size gt 1 to 1000 If SCALar is specified lt array size gt is not a valid parameter If ARRay is specified lt array size gt is a required parameter
72. ary www vxitech com IDN Purpose Queries the module for its identification string Type TEEE 488 2 Common Command Command Syntax N A OMEN eee N A RST Value N A Query Syntax IDN Query Parameters N A Query Response ASCII character string Description The Identification IDN query returns the identification string of the module The response is divided into four fields separated by commas The first field is the manufacturer s name the second field is the model number the third field is an optional serial number and the fourth field is the firmware revision number If a serial number is not supplied the third field is set to O zero Examples Command Query Response Description IDN VXI Technology Inc VM2164 0 1 0 The revision listed here is for reference only the response will always be the current revision of the instrument Related Commands VM2164 Command Dictionary 35 VXI Technology Inc OPC Purpose Sets the OPC bit in the Event Status Register Type TEEE 488 2 Common Command Command Syntax OPC AE N A RST Value N A Query Syntax OPC Query Parameters N A Query Response 1 Description The Operation Complete OPC command sets the OPC bit in the Event Status Register when all pending operations have completed The OPC query will return a 1 to the output queue when all pending operation
73. as been configured for an array measurement this command specifies whether the counter will perform one or all operations when an ARM command is received If the mode is ALL then all operations will be completed upon receipt of one arm signal If the mode is ONCE then the instrument will perform one operation and reenter the initiated state This will continue until the specified number of arm signals have been received At that point the specified number of operations have been completed Command Query Response Description CONF ARR FREQ 3 ARM MODE ONCE Configures the counter to take three array measurements Sets up counter to take one measurement and then re enter the initiated state ARM SOUR HOLD Selects ARM IMM as the starting point INIT Begins the measurement FETC COUN 0 ARM IMM FETC COUN 1 ARM IMM ARM IMM FETCH COUN FETC ARM MODE 3 368 1 234567891000000e 06 1 234567890000000e 06 1 234567892000000e 06 ONCE VM2164 Command Dictionary 47 VXI Technology Inc ARM SEQuencel I STARt LA Yer SLOPe Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands Specifies the slope of the counter external arm signal Instrument specific command ARM SEQuence1 I STARt LA Yer SLOPe lt slope gt lt slope gt POSitive or NEGativ
74. as been finalized Note Security must be turned off in order to use this command Calibration commands should only be executed by qualified personnel Changing these values incorrectly can cause the instrument to perform improperly Command Query Response Description CAL SEC OFF 16VM2164 Disables security CAL STOR Stores correction data into non volatile memory R CALibration SECure CODE CALibration SECure STATe 84 VM2164 Command Dictionary www vxitech com CALibration TEC OFFSet Calibrates one of three factors used by the TEC circuitry Instrument specific command CALibration TEC OFFSet lt tec_offset gt lt tech_offset gt All real numbers N A CALibration TEC OFFSet N A Returns the set value of the lt tec_offset gt parameter Calibrates one of three factors used by the TEC circuitry These factors are the start slope the stop slope and the offset personnel Changing these values incorrectly can cause the A Calibration commands should only be executed by qualified instrument to perform improperly Response Description Sets the TEC offset 3 9e 9 Returns the TEC offset Command Query CAL TEC OFFSET 3 9e 9 CAL TEC OFFSET CALibration SECure CODE CALibration SECure STATe VM2164 Command Dictionary 85 VXI Technology Inc CALibration TEC STARtslope Calibrates one of three factors used by the TEC circuitry In
75. ata values below a certain lt threshold gt Instrument specific command 0 and 2 CALCulate LIMit LOWer DATA lt threshold gt 0 and Paramete lt threshold gt 9 989999999999990e 99 to 9 989999999999990e 99 R alue 9 989999999999990e 99 Que 2 CALCulate LIMit LOWer DATA Query Paramete N A Query Response Returns the lt threshold gt value De 0 This command searches for all the input data values below a certain lt threshold gt Command Query Response Description CALC LIM LOW 5 0 Sets the lower threshold value CALC LIM LOW 5 00000000000000e 00 Returns the lower threshold value VM2164 Command Dictionary 63 VXI Technology Inc CAL Culate LIMit REPort DATA Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This query returns the lt memory_index gt and lt failed_value gt values collected Instrument specific query N A N A N A CAL Culate LIMit REPort DATA N A Returns the lower threshold value This query returns the lt memory_index gt and lt failed_value gt values collected in the most recent CALCulate LIMit DATA command Note e The CALCulate LIMit DATA command must be executed before running the CALC REP command If no data values were found the instrument will return a v
76. ate TRANsfrom HISTogram RANGe AUTO lt ONIOFF gt lt ONIOFF gt N A CAL Culate TRANsform HISTogram RANGe AUTO N A lt ONIOFF gt This command automatically determines the minimum and maximum values to be used in a histogram calculation The minimum and maximum data points will be used Command Query Response Description CALC TRAN HIST RANG AUTO ON Sets the range of a histogram calculation CALC TRAN HIST RANG AUTO ON VM2164 Command Dictionary 75 VXI Technology Inc CAL Culate TRANsform HISTogram Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This query calculates and returns the histogram for a set of data Instrument specific query N A N A N A CAL Culate TRANsform HISTogram N A lt bin_data bin_data gt This query calculates and returns the histogram for a set of data The format is as follows lt bin_data bin_data gt Command Query Response Description CALC TRAN HIST COUN 5 Sets the number of data to use in a histogram calculation to 5 CALC TRAN HIST POIN 3 Sets the number of intervals in a histogram calculation to 3 CALC TRAN HIST RANG 10 00 Sets the range of a histogram calculation CALC TRAN HIST Returns the histogram distribution
77. calculation CAL Culate TRANsform HISTogram COUnt Determines the number of data points to include in a histogram calculation X 1 CALCulate TRANsform HISTogram POINts Sets the number of intervals in a histogram calculation X 1 CALCulate TRANsform HISTogram RANGe Sets the minimum and maximum values to use in a histogram calculation 9 989999999999990e 99 9 989999999999990e 99 CALCulate TRANsform HISTogram RANGe AUTO This command sets the minimum and maximum values to use in a histogram x 1 calculation CAL Culate TRANsform HISTogram This query calculates and returns the histogram for a set of data CAL Culate VARiance This query calculates and returns the variance for a set of data Calibrates the reference oscillator Must have Option 15 or Option 16 CALibration COSCillator installed CALibration DAC OFFSet Calibrates one of the two factors used by the DAC CALibration DAC SLOPE Calibrates one of two factors used by the DAC CALibration DEFault Initializes calibration values to known values CALibration SECure CODE Sets the code required to disable calibration security Assumes the last CALibration SECure STATe Enable or disable calibration security value stored in CALibration STORe Stores calibration data into non volatile memory non volatile memory CALibration TEC OFFSet Calibrates one of three factors used by the TEC circuitry CALibration TEC STARtslope Calibrates one of three factors used by the TEC circuitry CALibration TEC STOPslope
78. cle measurement coooncnnccnccncononancnannnnnos 89 116 Operational status ooooonconnconoconcnccnnnoncnonoconcnnncononnnos 145 Oscillator frequency cococcocococcnononcnoncnnconcnnnonannnonnono 141 E A overheating ii ia 10 elapsed time in NAanosecondS ccoococonccnoncnninnnn 98 125 P electric Shock iia ainia 9 10 electrical Overl0ad ooooonoonccnicnococcnonnononononocnncanonacnnonos 9 Para Meteo An da 24 VM2164 Calibration and Verification 167 VXI Technology Inc pass through Mode ooooncnnncnnocinoncnoninnonncnnons 45 53 54 STATus QUEStionable ENABle ossee 152 peak valle iia aa 89 116 STATus QUEStionable EVENt ooooocnnnccinncccoo 153 Phase Angle measurement oooncnincnocnconncnno 133 134 Stop arm signals sassis iieii ea 54 phase measurement ooooococcccnnnacononinnncnoncno 91 118 144 StOP ALMING cooocoocconconnconoconoconccnnonanonns 53 56 57 58 59 POIN aida 100 SYNTAX il 23 POWER Nani cir 21 22 34 T POWER COI si cident Satter vida ees sti 9 10 POWER SOUICE artritis oia bes utsencnese tee 9 Temperature Controlled Crystal Oscillator 140 PLODES AE ET 10 temperature range coooccconncnoncconnnononaconcnononccnnnnnonnccnnes 10 processing delaySisvser ispis iesea isiro nei esine 100 terminating impedance s sssesseseesseeeesseseessessreeesee 111 programming language ccesceseeseeteeeeeeeeeeeeees 23 test leads nennu n a n a 10 threshold level mrncari 90 106 Q time interval measure
79. concnnonnccnns 57 ARM SEQuence2I STOP LA Yer SOURce CATalog DELayable ooococnncccnncccnonnconncnonnccnncnnnnnccnnccconnncnnnnonno 58 ARM SEQuence2I STOP LA Y er SOURce CATalog FIXed 0 eeccesceeesceceeeeceseeceseeeeneeceeeeeeneeceneeenaaeees 59 CAL Culate A VERage ssc ssschdsspsesesstasssistbs sovsedlees seshocesscoed ssepsbes nere irie REE TEESE KE sess aoa NESET E DEET Sse Tesna setos 60 CALCulate LIMit EN Velope DATA cecceeccesccesecseceseceseeeseeeceeseceseenseceeecases caeceaecaeecaeeeaeeeceseeeeaeensaeneenseenaes 61 CAL Cullate PIM O OUE o heen MER 62 CAL Culat LIMit LO WE DATA Ta e iia 63 CALCulate LIMit REPort DATA Ti aiii 64 CAL Culate EIMtUPPEL DATA ein 65 CAL Culate MAXIMUM ti 66 CAL Culate MED tain 0 A ia 67 CAECUlA MN e a ee ahah 68 CAL Culate SDE Vitis 69 CALCulate TRANsform HISTogram A BOVe 0 0 ccc cecesecssesecseesseseceecsecaeesccseesecnaeseceecneecnecseesecneeseesaeenesaecaseees 70 CALCulate TRANsform HISTogram BELOW cscessecssesscnscssesseeeessecseesecnessecsaeeececsaeesecneeseenaeeeesaecateseeasease 71 CALCulate TRANsform HISTogram COUD1 eescecssecscesessecsesseeeessecseesccsessecsaeseseceaeesecseesecsaseeesaecateecsascuee 72 CALCulate TRANsform HISTogram POINts cscssssecssessssececsseeeessecseesccnevsecsaesaseecaeesecsesseenaeeeesaecaseeceaesaee 73 CALCulate TRANsform HISTogram RANGE cesccsssecssesecsecsee caseeesecseesecsessecsaeeeseesseesecneesecnaeeeesaecaeeseeaeea
80. cription TST 0 Begins the self test procedure returns the result N A VM2164 Command Dictionary 41 VXI Technology Inc WAI Purpose Halts execution of additional commands and queries until the No Operation Pending message is true Type IEEE 488 2 Common Command Command Syntax WAI Command Parameters N A RST Value N A Query Syntax N A Query Parameters N A Query Response N A Description Examples Command Query Response Description The Wait to Continue command halts the execution of commands and queries until the No Operation Pending message is true This command makes sure that all previous commands have been executed before proceeding It provides a way of synchronizing the module with its commander Pauses the execution of additional commands until the No Operation Pending message is true Related Commands 42 VM2164 Command Dictionary www vxitech com INSTRUMENT SPECIFIC COMMANDS ABORt P ose This command aborts any actions in process Instrument specific command 0 and a ABORt 0 and Paramete N A R alue N A Que A N A Que Para ate N A Query Response N A De 0 This command aborts any actions in process Command Query Response Description ARM SOUR CAT BUS COUNTER CTR_EXTARM TTLTRGO TTLTRG1 TTLTRG2 TTLTRG3 TTLTRG4 TTLTRGS TTLTRG6
81. d into an appropriate chassis in any slot other than slot zero CALCULATING SYSTEM POWER AND COOLING REQUIREMENTS A It is imperative that the chassis provide adequate power and cooling for this module Referring to the chassis operation manual confirm that the power budget for the system the chassis and all modules installed therein is not exceeded and that the cooling system can provide adequate airflow at the specified backpressure It should be noted that if the chassis cannot provide adequate power to the module the instrument might not perform to specification or possibly not operate at all In addition if adequate cooling is not provided the reliability of the instrument will be jeopardized and permanent damage may occur Damage found to have occurred due to inadequate cooling will also void the module s warranty VM2164 Preparation for Use 21 VXI Technology Inc SETTING THE CHASSIS BACKPLANE JUMPERS Please refer to the chassis operation manual for further details on setting the backplane jumpers SETTING THE LOGICAL ADDRESS The logical address of the VM2164 is set by a single 8 position DIP switch located near the VMIP module s backplane connectors this is the only switch on the module The switch is labeled with positions 1 through 8 and with an ON position A switch pushed toward the ON legend will signify a logic 1 switches pushed away from the ON legend will signify a logic 0 The switch located at position 1 is
82. e POSitive ARM SEQuencel I STARt LA Yer SLOPe N A POS NEG Specifies the slope of the counter external arm signal When the slope is POSitive the CTR_EXTARM trigger source will be activated by a rising edge passing through the specified level When the slope is NEGative the CTR_EXTARM trigger source will be activated by a falling edge passing through the specified level Command Query Response Description ARM SEQuencel l STARt LA Yer SOURce 48 VM2164 Command Dictionary www vxitech com ARM SEQuencel I STARt LA Yer SOURce Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands Selects or queries the start arming source Instrument specific command ARM SEQuence 1 I STARt LA Yer SOURce lt source gt lt source gt BUS TTLTRGO TTLTRG1 TTLTRG2 TTLTRG3 TTLTRG4 TTLTRGS TTLTRG6 TTLTRG7 COUNTER CTR_EXTARM CTR_CHAN2 IMMEDIATE HOLD IMMEDIATE ARM SEQuence 1 I STARt LA Yer SOURce N A Returns the current lt source gt parameter value This command selects or queries the start arming source to be used when the counter is initiated Command Query Response Description ARM SEQuence 1 I STARt LA Yer SOURce CATalog ALL ARM SEQuence 1 I STARt LA Yer SOU
83. e Query Syntax Query Parameters Query Response Description Example Related Commands This command sets the counter to do lt array size gt number of measurements Instrument specific command SENSe COUNt lt array size gt DEFault MINimum MAXimum lt array size gt 1 to 1000 If SCALar is specified this parameter is no longer valid If ARRay is specified lt array size gt is a required parameter SENSe COUNT DEFault MINimum MAXimum N A This query returns the currently set lt array size gt count as set by the most recent arguments is used the DEFault MINimum or MAXimum value of the count is returned instead This command sets the counter to do lt array size gt measurements CONFigure and MEASure commands also set this count Command Query Response Description SENS COUNT 100 Set array size to 100 measurements SENS COUN 1 000000000000000e 02 CONFigure MEASure 132 VM2164 Command Dictionary www vxitech com SENSe EVENts Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command sets the counter lt of events gt Instrument specific command SENSe EVENts lt of events gt DEFault MINimum MAXimum lt of events gt 1 to 9e15 1e3 SENSe EVENts DEFault MINimum MAXimum
84. e 74 CALCulate TRANsform HISTogram RANGE AUTO 1 eececeecsseeeseecesecsecneesecsaeeecsaecaeesesaecaeesaseeeeaecateseeneeats 75 CAL Culate FRANsform HIS TO TM iio apnea arandelas 76 CAE Culat VAR tad 77 GCAMibration COS Gillator o A A A S Bases eA ne 78 CAT ibrati n DAC OF ES A Aa ta 79 CALibration DACILOPE sii i Goons din 80 CAL ibratlomDE Baul k PRAA E E AA A AEE o dl 81 CALibration SECure CODE oissid coito ddr dd dada tales cidcid 82 CALibration SE Cure pS ATE r ra dada las criada 83 CAL bratlon STORE AE E E E A E E ET 84 CALibration TEC Ft dal 85 CALibration TEC STARts lope incienso llocs ais 86 CALibration TEG S TOPs lope iii ssl as 87 CAL ibration FIN Terva OFFS etian esee ea EE e sdeetnceode cou shy AE E a AAEE E RET 88 CONFigure 112 SCALar l ARRay NDUTy cyclelPDUTCyclelDCYCle cooooooniccocccococononaccnoccnnonncnncnnonononocnnonos 89 CONFigure 112 SCALar ARRay NWIDthIPWIDth ssseseseesseeeesseseeseeesssesseessssreeessesersteseeseserstessesersteserseesrees 90 CONFigure 112 SCALar ARRay PHASC cccesceseceseeseceseceseeeeesecesecsecaeceaecnecaeecaeeeaeeeneseeeeeeeseesnseenseenaes 91 CONFigure 112 SCALar ARRay RTIMelFTIMelIRISE TIMEIFALL TIME ccecesseesseeseeeeeeereeeeeeeeeeees 92 CONFigure 112 SCALar ARRay TINTerval oo eccecccscecsseescesceesseeeeceseceseceaeceaecaeecaeceaeceaeeseeesenseeneeenseeeaeenees 93 CONFigure 112 SCALar ARRay VOLTage lt volt_fnc gt 00 ce eceecceece
85. e average of a specified number of measurements in the memory buffer RST Value CALCulate LIMit ENVelope DATA This command searches for all the input data values within an envelope of x 9 989999999999990e 99 values defined as being above below or in between as set boundary of values 9 989999999999990e 99 CALCulate LIMit FCOunt This query performs a limit test on the current available data CALCulate LIMit LOWer DATA Searches for all the input data values below a certain lt threshold gt X 9 989999999999990e 99 CALCulate LIMit REPort DATA This query returns the lt memory_index gt and lt failed_value gt values collected CAL Culate LIMit UPPer DATA Searches for all the input data values above a certain lt threshold gt x 9 989999999999990e 99 CALCulate MAXimum This query calculates and returns the maximum value of a set of data CALCulate MEDian This query calculates and returns the median value of a set of data CALCulate MINimum This query calculates and returns the minimum value of a set of data CALCulate SDEViation This query calculates and returns the standard deviation for a set of data CALCulate TRANsform HISTogram ABOVe This query returns the number of points above the maximum value in a histogram calculation CALCulate TRANsform HISTogram BELow This query returns the number of points below the minimum value in a histogram
86. e possible values returned are AC and DC This command sets the input block signal coupling for the specified channel to AC or DC Command Query Response Description 108 VM2164 Command Dictionary www vxitech com INPut 112 FILTer FREQuency Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command has no effect on the unit Instrument specific command INPut 112 FILTer FREQuency MINimum MAXimum DEFault or INPut 1 2 FILTer LPASs REQuency MINimum MAXimum DEFault lt filtfreq gt 20000000 20000000 INPut 1 2 FILTer FREQuency or INPut 1 2 FILTer LPASs FREQuency N A Returns 20000000 This command has no effect on the unit Querying the lt filtfreq gt parameter will always return 20000000 The filter frequency is always 155 kHz at 3 db and 50 kHz at the 5 point Command Query Response Description VM2164 Command Dictionary 109 VXI Technology Inc INPut 112 FILTer STATe DEFault Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command sets the input block signal low pass filter state for the selected channel to ON or OFF Instrument specif
87. e taking a value to be compared Note In order to specify a lt step_size gt the user must enter the lt count gt and the lt offset gt information Command Query Response Description CALC MIN Returns the minimum value for a set of data 68 VM2164 Command Dictionary www vxitech com CAL Culate SDEViation Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This query calculates and returns the standard deviation for a set of data Instrument specific query N A N A N A CAL Culate SDEViation lt count gt lt offset gt lt step_size gt lt count gt 1 to 1000 lt offset gt 1 to 1000 lt step size gt 1 to 1000 Returns the standard deviation for a set of data This query calculates and returns the standard deviation for a set of data The formula used for standard deviation is EJE nn 1 where n the number of data summed x the value of the data in the set If no valid data values were found No Data will be returned The optional parameters are for calculating selected values in the memory buffer The optional lt count gt parameter specifies the number of data points to calculate If no lt count gt is specified the number measured last is used as the default The optional lt offset gt parameter de
88. e to a known state SRE Sets the service request enable register STB Queries the Status Byte Register TRG Causes a trigger event to occur TST Causes a self test procedure to occur and queries the results WAI Halts execution of additional commands and queries until the No Operation Pending message is true ABORt This command aborts any actions in process ARM SEQuence1 I STARt LAYer DELay ARM SEQuencel I STARt LAYer ECOunt Specifies a time delay to occur after the receipt of an arm signal before actually arming the counter Specifies the number of arm signals to count prior to arming the counter 0 000000000000000e 00 0 000000000000000e 00 ARM SEQuence I STARt LA Yer MMediate To create a one time entry by the counter into the armed state ARM SEQuencel I STARt LA Yer MODE If the counter has been configured for an array measurement this command specifies whether the counter will perform one or all operations when an ARM ALL command is received ARM SEQuencel I STARt LA Yer SLOPe Specifies the slope of the counter external arm signal POS ARM SEQuencel I STARt LA Yer SOURce Selects or queries the start arming source IMM ARM SEQuence1 l STARt LA Yer SOURce CATalog ALL Lists all trigger sources available for use with the ARM SOUR command ARM SEQuence1 I STARt LA Yer SOURce CATalog DELayable Lists all delayable trig
89. e type of event such as type or setting Command Syntax Details the exact command format Command Parameters Describes the parameters sent with the command and their legal parameters RST Value Describes the value assumed when the RST reset command is sent Query Syntax Details the exact query form of the command Query Parameters Describes the parameters sent with the command and their legal range The default parameter values are assumed the same as in the command form unless described otherwise Query Response Describes the format of the query response and the valid range of output Description Describes in detail what the command does and refers to additional sources Examples Presents the proper use of each command and its query when available Related Commands Lists commands that affect the use of this command or commands that are affected by this command 30 VM2164 Command Dictionary www vxitech com VM2164 Command Dictionary 31 VXI Technology Inc IEEE 488 2 COMMON COMMANDS CLS Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Examples Related Commands Clears all status and event registers TEEE 488 2 Common Command This command clears the Status Event Register Operation Status Register and the Questionable Data Signal Register It also clears the OPC flag and clears all qu
90. ecaeeeneeeneseneeereeeeees 124 MEASure 1 2110 20 SCALar TOTalize ccc eccccccsscessecsesseesseecesecesseeceaeeessseseeeceseecseeseseecaeseeseeceseeeneaes 125 AA O E ES 126 010A N 3At 1A A RN RN 127 QUTPUE TIETTS STA Te oi R E R IN ET totes 128 READ T a A EO 129 RES S aera ae A 130 SENSe APERture DEFault MINimum MAXimum oococooncnonnnonnnconnnonnncnonnnonn nono nononnncnonnnonnnonnnn nono cnc nnninnncns 131 SENSe COUNt DEFault MINimum MAXIMUM ooccoocnononcconnnononcnonnconnonconnnonn cnn nnnononncnnnnnnnnco nn nono nnconnninnnnins 132 SENSE EVEN SO e e a e a dao e E aaa e n Ada dee e e AU 133 SENSe MODE di 134 SENSe FINTervalsDEL ays EVENTS isi cc cb scisssotdescbssssnsctpsitestnsssacuenesedesthassoveedjaspisbase na sxeussesesebsenundsecnsissneeasesest 135 SENSe TINTerval DEL ay TIME css tt praia septa oes 136 SENSe TIZT FUNC HOD evita td tidad 137 SENSe TIZIS RUN Gtom E Seabees a 138 SENSe 11211 OIZO 2 FUN Chon ii a edici n 139 SOURce COSCMHlator SOUR Cela a dc 140 SOURce COSCillator WATE aia 141 TEST aa 142 TESTA e e ee a a 143 UNITANGL eh E E E a O E E AEE A E E EA REE E E AEN 144 REQUIRED S CPL COMMANDS a a AE E OAEI e eN ov ede leadessedercedes 145 STATus OPERation CONDition ccccccccccssecececssecessececssecseccecsaecssecessees ceeecsseceueeeesaecseeeesesseeuesesaeeseeeesaeens 145 STATus OPERation ENAB le ita e deal des 146 STATUS OPERA NR aa astours 147 STATUS OPERAR a 148 STATus OPERaGon EVENT Pia
91. elow Square Wave Function Frequency 10 000050037 MHz Amplitude 3V DC offset 0V Phase 0 Measure frequency of function generator by issuing command READ and save as freq 1 Set Temp Temp freq 1 Get the X counter value by issuing command MFGTEST 0 and save in Xcount 0 Get the Y counter value by issuing command MFGTEST 1 and decrement by 1 and save in Y count 0 Get the Start TEC value by issuing command MFGTEST 2 and save in StartTec 0 Get the Stop TEC value by issuing command MFGTEST 3 and save in StopTec 0 Get the TEC StartTec constant by issuing command CAL TEC STAR and save in M1 Get the TEC StopTec constant by issuing command CAL TEC STOP and save in M2 Get the TEC offset constant by issuing command CAL TEC OFFSET and save in K3 162 VM2164 Index www vxitech com 3 45 3 46 3 47 3 48 3 54 3 55 3 56 3 57 3 58 3 59 Calculate the frequency with these values Freq 0 XCount0 Compare freq 0 with freq 1 should be less than 0 001 Hz Repeat steps 3 36 through 3 46 for 400 times Calculate TEC offset constant by using these equations Temp Temp 400 Temp 1000050 37 Temp K3 K3 Temp 10 0 000000001 Y Count 0 x 0 0000001 StartTec 0 x M1 StopTec 0 x M2 K3 Turn security off by issuing command CAL SEC STAT 0 0VM2164 Set the T
92. encel I STARt LA Yer ECOunt 0 0 0 cccccecesscecsssneececseececeeaeeecsesaeecsneeeeensseeecnesaesesseeaeensas 45 ARM SEQuencel I STARt LA Yer IMMediate cccccccecssecessecsssecensceeseeceeeceeseeceeecsaeceseeeeesseceeeeeaeens 46 ARM SEQuencel I STARt LA Yer MODE minereu nnii anoeie inene t e ai austa eaka Eiee 47 ARM SEQuencel I STARt LA Yer SLOPe 0 ccccceceesececsceseececseececesuececsesaeeeseeeeecseaeeecseaeeesnseeeeneas 48 ARM SEQuencel JI STARt LA Yer SOURCE 0 cece cecccccecessscecsesecececsnececeesaececsensecesaeeceseaeeecseaaeeesseeeeensas 49 ARM SEQuencel I STARt LA Yer SOURce CATalog ALL oo ee eecceceseceenceeeeceeeeeeceaeeeeeeeceaeeeeeeeeee 50 ARM SEQuencel I STARt LA Yer SOURce CATalog DELayable 00 0 eeeeeseecescessecceereeeneeceereeeneeees 51 ARM SEQuencel I STARt LA Yer SOURce CA Talog FIX ooo eeeescecsseceneeceseeceeeeeceeeesaeeceaeeeeeeeeee 52 ARM SEQuence2I STOP LA Y er DELay roine ien iisi e e EEEE E EE E TE E EER E 53 ARM SEQuence2l S TOP EA Yer EO OU Debes 54 ARM SEQuence2I STOP LAYer IMMediate cccccecssccssseesseccesscesseeceeceeseecesecessecesaeeeeseecsaeeesseeceeseeseene 55 ARM SEQuence2 STOPB LAYer SOURC6 occconoooccnonoconoconcccnoonnnncnonnnnnnonnnnccnnnnnncnnnrnnnnnnnn nn nono nnncnnnnnnnnnnnnnnnnns 56 ARM SEQuence2l STOP LAYer SOURce CATalog ALL coocoonnnccnncccoonnninnnconnnonnnccnonononnccnononnonc
93. ents in the memory buffer Instrument specific query N A N A lt count gt size of last array measurement lt offset gt 1 lt step_size gt 1 CAL Culate AVERage lt count gt lt offset gt lt step_size gt lt count gt 1 to 1000 lt offset gt 1 to 1000 lt step_size gt 1 to 1000 Averages a specified number of measurements in the memory buffer The optional parameters are for averaging selected values in the memory buffer This query averages a specified number of measurements in the memory buffer The optional parameters are for averaging selected values in the memory buffer lt count gt specifies the number of data points to calculate lt offset gt determines at which point the instrument will begin averaging stored values lt step_size gt determines the number of measurements the instrument will skip before taking a value to be averaged Note In order to specify lt step_size gt the lt count gt and lt offset gt values must be entered first If a lt count gt value is not specified then the instrument will use the most recent lt count gt as the default Command Query Response Description CALC LIM UPP 5 0 Sets upper data value limit CALC AVER Averages all the data that has been collected CALC AVER 20 3 2 Averages 20 measurement readings Starts with the 3 measurement Averages every other data point after that 60 VM2164 C
94. equency period can also be fetched after the command is initiated Command Query Response Description BUS COUNTER HOLD IMMEDIATE TTLTRGO TTLTRG1 TTLTRG2 TTLTRG3 TTLTRG4 TTLTRG5 TTLTRG6 TTLTRG7 TIMER CTR_EXTARM CTR_CHAN2 Configures the counter to read frequency ARM SOUR CAT CONF FREQ TRIG IMM FETC Arms counter to take an immediate measurement 1 234567890000000e 06 CONFigure commands SENSe commands VM2164 Command Dictionary 99 VXI Technology Inc FETCh COUNt Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This query returns the number of measurements completed Instrument specific query N A N A N A FETCh COUNt N A The number of measurements requested for the array This command returns the number of measurements completed This command may be used to monitor the progress of a measurement or an array of measurements CAUTION Do not continuously issue FETCh COUNt or STAT OPER COND queries to check if the measurement is complete Provide a minimum 100 ms delay between each query to permit the multitasking system to process the measurement efficiently or use SRQ to avoid processing delays caused by polling Command Query Response Description CONF FREQ Configures the counter to measure f
95. er of intervals in a histogram calculation VM2164 Command Dictionary 73 VXI Technology Inc CAL Culate TRANsform HISTogram RANGe Purpose Sets the minimum and maximum values to use in a histogram calculation Type Instrument specific command Command Syntax CAL Culate TRANsform HISTogram RANGe lt min_value gt lt max_value gt ANTENA lt min_value gt 9 989999999999990e 99 to 9 989999999999990e 99 lt max_value gt 9 989999999999990e 99 to 9 989999999999990e 99 RST Value 1 Query Syntax CALCulate TRANsform HIS Togram RANGe Query Parameters N A Query Response Returns the lt min_value gt and lt max_value gt in a histogram calculation Description This command sets the minimum and maximum values to be used in a histogram calculation Example Command Query Response Description CALC TRAN HIST RANG 1 100 Sets the range of a histogram calculation CALC TRAN HIST RANG 1 100 Returns the range of a histogram calculation Related Commands 74 VM2164 Command Dictionary www vxitech com CAL Culate TRANsform HISTogram RANGe AUTO Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command sets the minimum and maximum values to use in a histogram calculation Instrument specific command CAL Cul
96. et of less than 0 25 V Move the function generator output to the VM2164 Channel 2 input and repeat the previous steps adjusting R109 and monitoring TP4 Adjust the function generator for a 6 0 Vp p square wave at 10 kHz Apply the function generator output to the VM2164 Channel 1 Input Adjust C77 using the narrow blade end of the adjustment screwdriver while monitoring TP1 Set the oscilloscope to the 1 V range and adjust C77 for the flattest top of the square wave Move the function generator output to the VM2164 Channel 2 Input and repeat the previous steps adjusting C69 and monitoring TP2 Program the VM2164 for the following settings Setting Command CH 1 Attenuator Maximum INP1 ATT MAX CH 2 Attenuator Maximum INP2 ATT MAX Adjust the function generator for 0 0 V offset and 20 0 Vp p square wave at 10 kHz Apply the function generator output to the VM2164 Channel Input Adjust C81 using the narrow blade end of the adjustment screwdriver while monitoring TP1 Adjust C81 for the flattest top of the square wave Install the Input Capacitance Normalizer between the coaxial cable and the Channel 1 Input of the VM2164 Adjust C80 using the narrow blade end of the adjustment screwdriver while monitoring TP1 for the flattest top of the square wave Note that the amplitude of the signal at TP1 is roughly 1 2 of what was measured without the Input Capacitance Normalizer installed VM2164 Calibration and Verification 157
97. et value in non volatile memory by issuing command CAL STORE VM2164 Calibration and Verification 165 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 4 10 4 12 4 13 4 14 VXI Technology Inc Remove cable BNC plug to SMB plug from Synthesizer Function Generator signal to UUT Channel 1 Connect Synthesizer Signal through dual channel fixture to both Counter Input Channels 1 and 2 through cable BNC plug to 2 SMB plugs Disable auto trigger for Channel 1 by issuing command INP1 SETUP AUTO OFF Disable auto trigger for Channel 2 by issuing command INP2 SETUP AUTO OFF Configure for time interval by issuing command CONF TINT Set Function Generator as below Square Wave Function Frequency 10MHz Amplitude 3V DC offset OV Phase 0 Set Time Interval offset equal to O by issuing command CAL TINT OFFSET 0 SetI 1 Start taking reading time interval offset by issuing command READ Repeat step 3 8 for 3000 times then add all together and save as Summer New Time Interval Offset is determined by the following equation Summer 1 Summer 3000 0 0000001 Disable security by issuing command CAL SEC STAT 0 0VM2164 Set the time interval offset by issuing command CAL TINT OFFSET amp Str Summer Store new Time Interval Offset into non volatile memory by issuing command CAL STORE 166 VM2164 Index ww
98. ets the input block signal attenuator for the specified channel If lt attenuation gt is less than 2 the attenuator is set to 1 If lt attenuation gt is greater than 2 the attenuator is set to 10 Command Query Response Description VM2164 Command Dictionary 105 VXI Technology Inc INPut 1 2 COMParator 1 2 LEVel RELative Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command sets the comparator threshold level voltage of the channel and comparator selected Instrument specific command INPut 112 COMParator 112 LEVel RELative lt relative level gt lt relative level gt 4 5 to 4 5 for 1x range or 45 to 45 for 10x range 0 INPut 112 COMParator 1 2 LEVel RELative N A Returns the current threshold level This command sets the comparator threshold level voltage of the channel and comparator selected If the input number and comparator number are different the comparator number is the only number that is valid when this command is called Command Query Response Description 106 VM2164 Command Dictionary www vxitech com INPut 112 COMParator 112 SLOPe DEFault Purpose This command sets the slope for the selected input channel and comparator Type Instrument specific command Command
99. eues except the output queue Command Query Response Description Clears all status and event registers 32 VM2164 Command Dictionary www vxitech com ESE Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Related Commands N A required parameter Numeric ASCII value from 0 to 255 The Event Status Enable ESE command is used to set the bits of the Event Status Enable Register See ANSI IEEE 488 2 1987 section 11 5 1 for a complete description of the ESE register A value of 1 in a bit position of the ESE register enables generation of the Event Status Bit ESB in the Status Byte by the corresponding bit in the Event Status Register ESR If the ESB is set in the Service Request Enable SRE register then an interrupt will be generated See the ESR command for details regarding the individual bits The ESE register layout is Bit 0 Operation Complete Bit 1 Request Control Bit 2 Query Error Bit 3 Device Dependent Error Bit 4 Execution Error Bit 5 Command Error Bit 6 User Request Bit 7 Power On The Event Status Enable query reports the current contents of the Event Status Enable Register Command Que Response Description 36 Returns the value of the event status enable register VM2164 Command Dictionary 33 VXI Technology Inc ESR Purpose Type Command Syntax Command
100. evell Apply 3 V from Voltage Source to UUT Channel 1 Set DAC level at 2048 by issuing command MFGTEST LEVEL amp Str Channel amp amp Str level Compare DAC level with UUT comparator by issuing command MFGTEST COMP amp Str Channel If compared return value is true then decrease DAC level by Delta 1024 If compared return value is false then increased DAC level by Delta 1024 Repeat steps 2 9 through 2 10 with Delta is 50 of previous value The process continues until Delta closes to or Zero The final DAC level is save as Level2 Calculate the Scale and Offset factor of the DAC by using the following equations Scalel levell level2 3 3 Offsetl levell 3 Scalel Send Scalel to the instrument by issuing command CAL DAC1 SLOPE 8 Str Scale1 Send Offsetl to the instrument by issuing command CAL DAC1 OFFSET amp Str Offset1 158 VM2164 Index www vxitech com 2 17 Set the attenuation 10 times on the Channel 1 by issuing command INP1 ATT 10 2 18 Apply Voltage Source 20 V to UUT Channel 1 2 19 Repeat steps 2 4 through 2 7 2 20 Apply 20 V from Voltage Source to UUT Channel 1 2 21 Repeat steps 2 9 through 2 12 2 22 Calculate the Scale and Offset factor of the DAC by using the following equations Scalel levell level2 20 20 Offset1 levell 20 Scalel 2 23 Send Scale1 to the instrument by issuing
101. f SCALar is specified this parameter is no longer valid If ARRay is specified lt array size gt is a required parameter 1 CONFigure Returns the current measurement configuration This includes any channels SCALar or ARRay settings and measurements selected Returns the current measurement configuration This includes any channels SCALar or ARRay settings and measurements selected This command configures the counter to measure the frequency of the signal on the CONFigure suffix input channel The units of lt expected value gt and lt resolution gt are both Hz This command will modify the following e function set to FREQuency e aperture described below e aperture events mode set to APERture If autosetup mode is ON or ONCE the input channel attenuation offset gain level and slope can be modified If neither of the optional arguments are used e aperture is set to the default value If only the lt expected value gt argument is used e aperture is set to the default value If both lt expected value gt and lt resolution gt are used the aperture is calculated as follows apperature 2 Hos expected 1og resolution with a minimum of le 8 and a maximum for 5 seconds A longer aperture may be set with the SENSe FREQuency APERture command See CONFigure 112 10120 SCALar ARRay TOTalize for example MEASure commands SENSe commands VM2164 Command Dictionary 95
102. ger sources available for use with the ARM SOUR command ARM SEQuence1 I STARt LA Yer SOURce CATalog FIXed Lists all fixed trigger sources available for use with the ARM SOUR command ARM SEQuence2I STOP LAYer DELay Specifies a time delay to occur after receipt of a stop arm signal prior to actually disarming the counter 0 000000000000000e 00 ARM SEQuence2 STOP LA Yer ECOunt Specifies the number of stop arm signals the instrument will count prior to disarming the counter 0 000000000000000e 00 ARM SEQuence2 STOP LA Yer MMediate Causes a one time exit by the counter from the armed state ARM SEQuence2I STOP LAYer SOURce Selects or queries the stop arming source to be used when the counter is initiated IMM ARM SEQuence2 STOP LAYer SOURce CATalog ALL Lists all trigger sources available for use with the ARM STOP SOUR command See command for possible query responses ARM SEQuence2l STOP LAYer SOURce CATalog DELayable Lists all fixed trigger sources available for use with the ARM STOP SOUR command ARM SEQuence2l STOP LA Yer SOURce CATalog FIXed Lists all delayable trigger sources available for use with ARM STOP SOUR command TIO UYIITXA MMM 97 Areuonoid puvwuop Y9IZINA CALCulate A VERage ALPHABETICAL COMMAND LISTING CONT Description This query calculates th
103. gger lines as outputs OUTP TTLT STAT 1 Indicates that the TTL trigger lines are enabled as outputs 128 VM2164 Command Dictionary www vxitech com READ Purpose This query causes an INITiate MMediate action and a FETCh query Type Instrument specific command Command Syntax N A AAA N A RST Value N A Query Syntax READ Query Parameters N A Query Response See Description Description The query causes an INITiate IMMediate action and a FETCh query See the INITiate and FETCh command descriptions Example Command Query Response Description Related Commands INITiate FETCh VM2164 Command Dictionary 129 VXI Technology Inc RESet Purpose Resets the module s hardware and software to a known state Type Instrument specific command Command Syntax RESet OM NEw eee N A RST Value N A Query Syntax N A Query Parameters N A Query Response N A Description The Reset command resets the module s hardware and software to a known state See the command index at the beginning of this chapter for the default parameter values used with this command Analogous to the RST command Examples Command Query Response Description RES Resets the module Related Commands RST 130 VM2164 Command Dictionary www vxitech com SENSe APERture DEFault MINimum MAXimum Purpose Type Command Syntax
104. h com CAL Culate MEDian Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This query calculates and returns the median value of a set of data Instrument specific query N A N A 1 CAL Culate MEDian lt count gt lt offset gt lt step_size gt lt count gt 1 to 1000 lt offset gt 1 to 1000 lt step size gt 1 to 1000 Returns the median value for a set of data This query calculates and returns the median value for a set of data The lt data_index gt returned indicates the data point in memory where the median value is The lt median_value gt returns the value of the median data point If no valid data values were found then No Data will be returned The optional parameters allow for searching for selected values in the memory buffer The optional lt count gt parameter specifies the number of data points to search If no lt count gt is specified the number measured last is used as the default The optional lt offset gt parameter determines the point in memory where the search for values begins The optional lt step_size gt parameter determines the number of measurements to skip before taking a value to be compared Note In order to specify lt step_size gt the user must enter the lt count gt and the lt offset gt information Command Quer
105. ic command INPut 112 FILTer STATe lt filter_state gt DEFault lt filter_state gt OFF ON Default ON ON INPut 112 FILTer STATe N A Returns the current lt filter_state gt parameter value This command sets the input block signal low pass filter state for the selected channel to ON or OFF Without the optional parameter this command moves to the output buffer the current setting of the input low pass filter state for the specified channel If the optional argument DEFault is included the default filter state is moved to the output buffer The possible values returned are 1 for ON with the 155 kHz filter being used 0 for OFF Command Query Response Description INPutl FILT STAT ON ON 110 VM2164 Command Dictionary www vxitech com INPut 1 2 IMPedance DEFault Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command sets the input terminating impedance for the specified channel Instrument specific command INPut 1 2 IMPedance lt impedance gt DEFault lt impedance gt 50 to 1e6 Default 1e6 1e6 INPut 1 2 IMPedance DEFault N A Without the optional parameter this query returns the current setting of the input terminating impedance for the specified channel If the optional argument D
106. ical overload electric shock or fire hazard do not use a power source that applies other than the specified voltage Use Proper Fuse To avoid fire hazard only use the type and rating fuse specified for this product Preface WARNINGS CONT A Avoid Electric Shock Ground the Product Operating Conditions Improper Use VXI Technology Inc To avoid electric shock or fire hazard do not operate this product with the covers removed Do not connect or disconnect any cable probes test leads etc while they are connected to a voltage source Remove all power and unplug unit before performing any service Service should only be performed by qualified personnel This product is grounded through the grounding conductor of the power cord To avoid electric shock the grounding conductor must be connected to earth ground To avoid injury electric shock or fire hazard Do not operate in wet or damp conditions Do not operate in an explosive atmosphere Operate or store only in specified temperature range Provide proper clearance for product ventilation to prevent overheating DO NOT operate if any damage to this product is suspected Product should be inspected or serviced only by qualified personnel The operator of this instrument is advised that if the equipment is used in a manner not specified in this manual the protection provided by the equipment may be impaired Conformity is checked by inspect
107. ied lt array size gt is a required parameter This command will modify the following e Function set PHASe e Aperture events mode set to APERture The input channel attenuation offset gain level and sloped can be modified This query performs a phase measurement The suffix selects the channel for the beginning of the measurement For example MEAS1 PHASe will perform a phase measurement from Channel to Channel 2 where MEAS2 PHASe performs a phase measurement from Channel 2 to Channel 1 Note Time Interval With Delay Phase and Duty Cycle use all available hardware timers When the counter is in one of these modes the aperture is controlled by software and has a minimum period of approximately 10 ms Command Query Response Description MEAS2 ARR NDUT Takes 1000 negative duty cycle measurements 1000 25 with a trigger point of 25 of the signal s peak MEAS2 ARR PDUT 100 Takes 100 positive duty cycle measurements with 50 a trigger point of 50 of the signal s peak value MEAS1 PHAS Take a phase measurement from Channel I to Channel 2 MEAS TINT DEL EVEN Take a time interval with delay measurement 100 from Channel 1 to the 100 edge on Channel 2 MEAS10 TOT Totalize Channel 1 and the 1 GHz VCO CONFigure SENSe 118 VM2164 Command Dictionary www vxitech com MEASure 112 SCALar l A RRay RTIMelFTIMelIRISE TIMEIFALL TIME Purpose Type Command Syntax Command
108. ific command CONFigure 112 SCALar ARRay PHASe lt array size gt lt expected value gt L lt resolution gt lt array size gt 1 to 1000 If SCALar is specified this parameter is no longer valid If ARRay is specified lt array size gt is a required parameter 1 CONFigure N A Returns the current measurement configuration This includes any channels SCALar or ARRay settings and measurements selected This command configures a phase measurement The suffix selects the channel for the beginning of the measurement For example CONF1 PHASe will set up the instrument to perform a phase measurement from Channel 1 to Channel 2 whereas CONF2 PHASe will set up the instrument to perform a phase measurement from Channel 2 to Channel 1 This command will modify the following e Function set to PHASe e Aperture events mode set to aperture If auto setup is ON or ONCE the input attenuation offset gain level and slope can be modified Note Phase measurements use all available hardware timers When the counter is in this mode the aperture is controlled by software and has a minimum period of approximately 10 ms See CONFigure 1 2110 20 SCALar ARRay TOTalize for example MEASure commands SENSe commands VM2164 Command Dictionary 91 VXI Technology Inc CONFigure 1 2 SCALar ARRay RTIMelFTIMelIRISE TIMEIFALL TIME Purpose Type Command Syntax Command Parameters
109. ion Preface www vxitech com SUPPORT RESOURCES Support resources for this product are available on the Internet and at VTI Instruments customer support centers VTI Instruments Corp World Headquarters VTI Instruments Corp 2031 Main Street Irvine CA 92614 6509 er Instruments Fax 949 955 3041 VTI Instruments Cleveland Instrument Division 5425 Warner Road Suite 13 Valley View OH 44125 Phone 216 447 8950 Fax 216 447 8951 VTI Instruments Lake Stevens Instrument Division 3216 Wetmore Avenue Suite 1 Everett WA 98201 Phone 949 955 1894 Fax 949 955 3041 VTI Instruments Pvt Ltd Bangalore Instrument Division 642 80 Feet Road Koramangala IV Block Bangalore 560 034 India Phone 91 80 4040 7900 Phone 91 80 4162 0200 Fax 91 80 4170 0200 Technical Support Phone 949 955 1894 Fax 949 955 3041 E mail support vtiinstruments com Visit http www vtiinstruments com for worldwide support sites and service plan information Preface 11 VXI Technology Inc Preface www vxitech com SECTION 1 INTRODUCTION OVERVIEW The VM2164 is a high performance system level universal counter designed to outperform traditional rack and stack and other C size VXIbus counters but with a considerably smaller footprint A part of the VMIP VXI Modular Instrumentation Platform family of products the VM2164 can be combined with up to
110. is specified this parameter is no longer valid If ARRay is specified lt array size gt is a required parameter RST Value 1 Query Syntax CONFigure Query Parameters N A Query Response Returns the current measurement configuration This includes any channels SCALar or ARRay settings and measurements selected Description This command sets the counter to make a time interval measurement This measurement is made between input Channels and 2 The CONFigure suffix selects the input channel for the beginning of the interval The end of the interval will be from the remaining channel The measurement is made from the first detected rising edge on the first channel to the first following rising edge on the second channel If the lt expected value gt argument is used the expected period of the input signal should be used not the expected timer interval This command will modify the following e function set to TINTerval e aperture described below e aperture events mode set to APERture If autosetup mode is ON or ONCE the input channel attenuation offset gain level and slope can be modified If neither of the optional arguments are used e aperture is set to the default value If only the lt expected value gt argument is used e aperture is set to the default value If both lt expected value gt and lt resolution gt are used the aperture is calculated as follows appera ture 1 2108 expected
111. ising or Falling edge sensitive Output Any VXIbus TTL Trigger line may be selected to follow the measurement gate signal polarity is programmable FREQUENCY MEASUREMENTS Input 1 amp 2 Range 500 uHz to 200 MHz DC coupled 20 Hz to 200 MHz AC coupled Input 1 amp 2 Resolution eae jt Start Trigger Error Stop Trigger Error q al Gate Time s e ror Laso Input 1 amp 2 Systematic Error Frequency fa Time Base Error E Input 3 Frequency Range 150 MHz to 2 5 GHz Input 3 Resolution 32 F al t ae Start Trigger Error Stop Trigger Error x Frequency x i z Gate Time Input 3 Systematic Error P y 32x Frequency x Time Base Error te _ GateTime Accuracy 1 i Systematic Error Resolution Time Base Error x finpur 222 fnpur Gate Time VM2164 Introduction 17 VXI Technology Inc FREQUENCY RATIO Input 1 amp 2 Range Results Range CH1 CH2 CH2 CH1 Resolution CHIL CH2 Resolution CH2 CH1 Input 3 Range CH3 CH3 CH1 CH2 500 uHz to 200 MHz DC coupled 20 Hz to 200 MHz AC coupled 2 5 x 10 to 4 0 x 10 Countcy Countcy Countcy Countcp 1 Countcy Countcp 1 Countoyy Countcy 150 MHz to 2 5 GHz Results Range A AA 2 0 x 10 to 5 0 x 10 CH1 CH2 CH3 CH3 Resolution CH CH2 Countcurorcuz _Countoniorcn2 CH3 CH3 Count cuz Count cyz 32 Resolution CH3 CH3 Counters Counteis CH
112. le measurements with 1000 25 a trigger point of 25 of the signal s peak MEAS2 ARR PDUT 100 Takes 100 positive duty cycle measurements with a 50 trigger point of 50 of the signal s peak value MEAS1 PHAS Take a phase measurement from Channel I to Channel 2 MEAS TINT DEL EVEN Take a time interval with delay measurement from 100 Channel 1 to the 100 edge on Channel 2 MEAS10 TOT Totalize Channel I and the 1 GHz VCO Related Command CONFigure SENSe VM2164 Command Dictionary 125 VXI Technology Inc OUTPut CLOCk Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command toggles the External Reference as a useable reference clock Instrument specific command OUTPut CLOCk lt boolean gt lt boolean gt 0 1 OFF ON 1 OUTPut CLOCk N A Returns the set lt boolean gt parameter value This command toggles the External Reference as a useable reference clock Setting the value to 0 or OFF disables the clock function of the External Reference while setting the value to 1 or ON enables it Command Query Response Description OUTP CLOC ON Enables the clock for the External Reference OUTP CLOC ON Indicates that the External Reference clock in enabled 126 VM2164 Command Dictionary www vxitech com
113. log resolution with a minimum of le 8 and a maximum of 5 seconds A longer aperture may be set with the SENSe TINTerval APERture command Example See CONFigure 1 2110 20 SCALar ARRay TOTalize for example Related Commands MEA Sure commands SENSe commands VM2164 Command Dictionary 93 VXI Technology Inc CONFigure 112 SCALar ARRay VOLTage lt volt_func gt Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands These commands configure the counter to measure the voltage on the CONFigure suffix input channel Instrument specific command CONFigure 1 2 SCALar l ARRay VOLTage lt volt_func gt lt array size gt lt expected value gt lt resolution gt lt volt_func gt AC DC MINimum MAXimum PTPeak lt array size gt 1 to 1000 If SCALar is specified this parameter is no longer valid If ARRay is specified lt array size gt is a required parameter 1 CONFigure N A Returns the current measurement configuration This includes any channels SCALar or ARRay settings and measurements selected These commands configure the counter to measure the voltage on the CONFigure suffix input channel The lt expected value gt and lt resolution gt parameters are accepted but ignored The maximum and minimum voltage of the input
114. ly Command Quer Response Description CAL DAC 1 SLOP 409 6 Sets the DAC slope value for Channel 1 CAL DAC 1 SLOP 409 6 Returns the DAC slope value CALibration SECure CODE CALibration SECure STATe 80 VM2164 Command Dictionary www vxitech com CALibration DEFault Initializes calibration values to known values Instrument specific command CALibration DEFault N A N A N A N A N A Initializes calibration values to known values The following values are set Security Code VM2164 Serial Number 0 Product 2164 TEC Slope 5 92e 11 TEC Offset 3 9e 9 Time Interval 1 44e 9 DAC Scale 409 6 1x 40 96 10x DAC Offset 2048 0 Oscillator Trim Value 2048 Executing this command changes all previously set calibration values personnel Changing these values incorrectly can cause the A Calibration commands should only be executed by qualified instrument to perform improperly Command Query Response Description CAL DEF Initializes calibration values to known values VM2164 Command Dictionary 81 VXI Technology Inc CALibration SECure CODE Sets the code required to disable calibration security Instrument specific command CALibration SECure CODE lt string gt lt string gt the code string can be from 1 to 12 ASCII characters in length entered in IEEE 488 2 definite or indefinite
115. ment oooooonoccccnnnncnncnnnnononns 93 120 query Mine 23 totalize measurement oooooncnnccnonnnoncnnnconaconocinos 101 125 R totalized measurement c oooonnncicnnonnonnconnconocnncnnnncnnnnns 98 tree structured language oonocnoccnonnnonconnconoconccancnanonos 23 range Of parameters c ocooccccnoconononcnononnonannnonnnnnnonannnonos 23 U tating FUSE er reperi eet nied miei eae eh 9 reference oscillator ee eeeeeceeeeeeeeeeceeeeeeeeeeeeee 140 universal counter ee eecceseeceeeceeeceeeeceeceeeeneeeeeens 13 Reference Oscillator ccccecceesseesceeseeeeeeeeeneeeees 140 Reset Valli 24 y S A AAEE 10 Venfication ness eea e a a ER EE as 156 second INE SEF seri a E EE a E 101 MM an E 15 Self test operations oooococccononononcnnnnononaconcnoncnnonacnnonos 143 WIMIP dt ii 22 single slot timer counter ooooooncccoccoconnnoncnncnnnonccnncnnono 13 o AAA esis esiiesiesoes tssis 102 SOT ADTA in SE E PE TE 91 118 131 voltage measurement ooooococococononononcconaconnccnonnninnccnno 102 Specifications eeceeceeeeceseceeeceseeeeeeseeeeeeeeees 15 16 WXADUS EE AONO EOE EE EAEN 14 23 specified Volante 9 VXIplug amp play drivers 14 standard deviatiO oooooonccnocnoconoconononnnconcconcnnncnnncnnos 69 w STATus OPERation ENABIle oooooonconccinociccncccnonnono 146 STATus OPERation EVENt oooocooncncccconnninnnccns 149 wet or damp conditions oooooconnccnonnoonconoconcnnnconononnonos 10 STATus PRESet occonococonnnccononina
116. ms the TTLTO source ARM ECO 100 Sets the event counter for 100 events INIT Begins the measurement ARM ECO 1 000000000000000e 02 VM2164 Command Dictionary 45 VXI Technology Inc ARM SEQuencel STARt LA Yer IMMediate Purpose To create a one time entry by the counter into the armed state Type Instrument specific command Command Syntax ARM SEQuencel I STARt LA Yer MMediate Command Parameters N A RST Value N A Query Syntax N A Query Parameters N A Query Response N A Description This function creates a one time entry by the counter into the armed state without receiving the specified start arm signal Example Command Query Response Description Related Commands 46 VM2164 Command Dictionary www vxitech com ARM SEQuencel I STARt LA Yer MODE Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands Tf the counter has been configured for an array measurement this command specifies whether the counter will perform one or all operations when an ARM command is received Instrument specific command ARM SEQuence1 I STARt LA Yer MODE lt mode gt lt mode gt ONCE or ALL ALL ARM SEQuencel I STARt LA Yer MODE N A ONCE ALL When the counter h
117. mum Command Query Response Description CONFigure SENSe VM2164 Command Dictionary 121 VXI Technology Inc MEASure 112131 SCALar ARRay FREQuency Purpose Configures the counter to measure the frequency of the signal on the MEASure suffix input channel Type Instrument specific query Command Syntax N A Command Parameters N A RST Value 0 Query Syntax MEASure 11213 SCALar l ARRay FREQuency lt array size gt lt expected value gt L lt resolution gt Query Parameters lt array size gt 1 to 1000 If SCALar is specified this parameter is no longer valid If ARRay is specified lt array size gt is a required parameter Query Response This command will modify the following e function set to FREQuency e aperture described below e events events mode set to APERture Description This query configures the counter to measure frequency of the signal on the MEASure suffix input channel The measurement is initiated and the result placed in the output buffer The units of lt expected value gt and lt resolution gt are both Hertz If autosetup mode is ON or ONCE the input channel attenuation offset gain level and slope can be modified If neither of the optional arguments are used e aperture is set to the default If only the lt expected value gt argument is used e aperture is set to the default value If both lt expected value
118. mum will set O as the minimum measurement and return measurements as 0 to 360 degrees or 0 to 27 radians CENTer will set 0 as the center measurement and return measurements form 180 to 180 degrees or n to m radians Selecting AUTO will start as MINimum returning positive values only The instrument will automatically switch to CENTer if crossing 0 degrees 0 radians in the negative direction and automatically switch back to MINimum if crossing 180 degrees x radians in the positive direction Command Query Response Description UNIT ANGL DEG CENT Values from 180 to 180 UNIT ANGL DEG CENT CONFigureIMEASurelSENSe PHASe 144 VM2164 Command Dictionary www vxitech com REQUIRED SCPI COMMANDS STA Tus OPERation CONDition Purpose the counter The STATus OPERation CONDition query returns the current operational status of Type Required SCPI query Command Syntax N A Command Parameters N A RST Value 0 Query Syntax STATus OPERation CONDition N A Query Parameters Query Response This query returns the operational condition register value Description Bit Definition 0 Calibrating The STATus OPERation CONDition query returns the current operational status of the counter The bit definitions of the value are bit the least significant bit Function Set when any CALibration operation is running Cleared when the CALibrati
119. n Status Summary Examples Command Que Response Description STB 16 Queries the Status Byte Register Related Commands N A VM2164 Command Dictionary 39 VXI Technology Inc TRG Purpose Causes a trigger event to occur Type TEEE 488 2 Common Command Command Syntax TRG OM NEN eee N A RST Value N A Query Syntax N A Query Parameters N A Query Response N A Description The Trigger command causes a trigger event to occur Examples Command Query Response Description TRG Triggers an event Related Commands N A 40 VM2164 Command Dictionary www vxitech com TST Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Examples Related Commands Causes a self test procedure to occur and queries the results IEEE 488 2 Common Command N A N A N A TST N A Numeric ASCII value from 0 to 143 Initiates the counter self test operation If the test fails an error message is placed in the error queue and then the error LED blinks The self test tests the following e Two 4 kb counter measurement buffers e Logic registers e Analog front end per amp offset pre amp inverter and pre amp gain digital to analog converters DACs e A2 5 MHz signal is routed through a test source and checked for accuracy Command Query Response Des
120. nanononnnos 147 148 150 word Serial protocol ccecceeceeseeeeceseeeeeeeeeeseeeeens 14 STATus QUEStionable CONDition 008 151 168 VM2164 Index
121. nd Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command sets the duration of time that will be allowed for a signal to occur before a measurement is aborted Instrument specific command INPut 112 SETup AUTO TIMe N A 0 02 INPut 112 SETup AUTO TIMe N A Returns the set value This command sets the duration of time the counter will wait before aborting a measurement If a signal has not been received within this time interval the measurement is aborted If the frequency of a signal is less than 50 Hz this setting should be adjusted accordingly frequency 1 time This command establishes the lowest frequency that can be measured by the counter This time duration is taken into consideration when the INPut SETup AUTO command is used The time used will be the longer of the two values set for the aperture and INPut SETup AUTO TIMe settings Command Query Response Description INP1 SET AUTO TIM 0 4 Sets the lowest measurable frequency to 25 Hz INP1 SET AUTO TIM 0 4 Returns the set value for the wait time INPut 112 SETup AUTO INPut 112 SETup TIMe 114 VM2164 Command Dictionary www vxitech com INPut 112 SETup TIMe Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example
122. nel to the first following rising edge on the second channel If the lt expected value gt argument is used then the expected period of the input signal should be used not the expected time interval If auto setup mode is ON or ONCE the input channel attenuation offset gain level and slope can be modified If neither of the optional arguments are used e aperture is set to the default value If only the lt expected value gt argument is used e aperture is set to the default value If both lt expected value gt and lt resolution gt are used the aperture is calculated as follows appera ture 1 g Hoe expected log resolution with a minimum of le 8 and a maximum of 5 seconds A longer aperture may be set with the SENSe TINTerval APERture command Command Query Response Description MEAS2 ARR NDUT 1000 25 Takes 1000 negative duty cycle measurements with a trigger point of 25 of the signal s peak MEAS2 ARR PDUT 100 50 Takes 100 positive duty cycle measurements with a trigger point of 50 of the signal s peak value MEAS1 PHAS Take a phase measurement from Channel 1 to Channel 2 MEAS TINT DEL EVEN 100 Take a time interval with delay measurement from Channel 1 to the 100 edge on Channel 2 MEAS10 TOT Totalize Channel 1 and the 1 GHz VCO CONFigure SENSe 120 VM2164 Command Dictionary www vxitech com MEASure 1 2 SCALar ARRay VOLTage lt volt_func gt
123. nse 0 Description Queries the bits set in the event register of the Operation Status Register This command clears all bits in the event register Examples Command Query Response Description STAT OPER 0 Related Commands STATus OPERation CONDition STATus OPERation ENABle VM2164 Command Dictionary 149 VXI Technology Inc STATus PRESet Purpose Presets the Status Registers Type Required SCPI command Command Syntax STATus PRESet OMEN een N A RST Value N A Query Syntax N A Query Parameters N A Query Response N A Description The Status Preset command presets the Status Registers The Operational Status Enable Register is set to 0 and the Questionable Status Enable Register is set to 0 This command is provided for SCPI compliance only Examples Command Query Response Description STAT PRES Related Commands N A 150 VM2164 Command Dictionary www vxitech com STA Tus QUEStionable CONDition Purpose Queries the Questionable Status Condition Register Type Required SCPI query Command Syntax N A Command Parameters N A RST Value N A Query Syntax STATus QUEStionable CONDition Query Parameters N A Query Response 0 Description The Questionable Status Condition Register query is provided for SCPI compliance only The VM2164 does not alter any bits in this register and a query always reports a0 Exam
124. nt disarms immediately upon receipt of an arming signal Command Query Response Description CONF VOLT DC Sets the counter for DC voltage measurement ARM STOP SOUR TTLTO Sets source as TLTO ARM STOP DEL le3 Sets time delay to be 1000 seconds INIT Begins the measurement ARM STOP DEL 1 000000000000000e 03 VM2164 Command Dictionary 53 VXI Technology Inc ARM SEQuence2 STOP LA Yer ECOut Specifies the number of stop arm signals the instrument will count prior to disarming the counter Instrument specific command ARM SEQuence2I STOP LA Yer ECOunt lt event_delay gt lt event_delay gt 0 to 65 535 triggers 0 triggers pass through ARM SEQuence2I STOP LA Yer ECOunt N A Returns the current lt event_delay gt parameter value This command specifies the number of stop arm signals the instrument will count prior to disarming the counter Upon receipt of an arming signal the counter will exit the armed state If the arm source selected is fixed i e HOLD IMMEDIATE TIMER CTR_CHAN2 this command will have no effect on disarming the counter This command always zeros the delay by time parameter so specifying an event count of zero places the arm subsystem in pass through mode In this mode the instrument arms immediately upon receipt of a trigger Command Query Response Description CONF VOLT DC Sets the counter for DC
125. nterval Time Interval Average PHASE VOLTAGE VDC Vp p Vmax Vein ARMING Arm Source Ch 1 Ch 2 Ext VXI TTLT Arm Slope Positive Negative Trigger Level Fixed approximately TTL Arming Start Delay Events Timed Hold Off Timed Burst Sync Delay Timed MEASUREMENT STORAGE Standard 1000 measurements POSITIVE NEGATIVE DUTY CYCLE TOTALIZE VM2164 Introduction 15 VXI Technology Inc GENERAL SPECIFICATIONS INPUT SPECIFICATIONS CHANNEL 1 amp 2 Impedance 1 MQ 20 pF 50 Q 20 pF Frequency Range DC Coupled DC 200 MHz AC Coupled 20 Hz 200 MHz Low Pass Filter 5 Point 50 kHz 3 dB 155 kHz Sensitivity 1x 20 mVrms up to 50 MHz 40 mVrms 50 MHz to 200 MHz 100 mVpp 5 to 10 ns pulse 50 mVp p Greater than 10 ns pulse 10x 200 mVrms up to 50 MHz 400 mVrms 50 MHz to 200 MHz 1 0 Vp p 5 to 10 ns pulse 500 mVp p Greater than 10 ns pulse Crosstalk lt 36 dB at 100 MHz into 50 Q Input Damage Level 1x 10x 240 Vrms DC ACrms to 2 kHz linearly derated to 5 Vrms at 100 kHz 5 Vrms above 100 kHz 50 Q Input 5 Vrms DC to 200 MHz Trigger Level Range 1x 5 0 V 10x 50 V Trigger Level Resolution 1x 2 5 mV 10x 25 mV Trigger Sensitivity 1x 20 mVrms Sine Wave lt 50 MHz 40 mVrms Sine Wave 50 MHz to 200 MHz 10x 200 mVrms Sine Wave lt 50 MHz 400 mVrms Sine Wave 50 MHz to 200 MHz Auto Trigger Automatically set to the 50 point between the
126. of the totalize measurement between the indicated channels Description This query performs a totalize measurement The counter totalizes two selected channels simultaneously Channels 1 and 2 are selected by either 1 or 2 Channel 1 and the 1 GHz VCO are selected by 10 Channel 2 and the 1 GHz VCO are selected by 20 Selecting either Channel 1 or 2 and the VCO provides an elapsed time in nanoseconds after the totalized results for the selected channel The measurement is unique It allows totals to be fetched while the counter is still in the process of counting Each fetch will return updated count values This command has a default aperture of 99 days Use the ABORt command to end this measurement Since this measurement allows reading the counter hardware while it is counting there is some risk that the value returned will be in error If the optional lt expected value gt and lt resolution gt arguments are not used e aperture is set to the default value If only the lt expected value gt argument is used e aperture is set to the default value If both lt expected value gt and lt resolution gt are used the aperture is calculated as follows appera ture 1 2108 expected log resolution with a minimum of le 8 and a maximum of 5 seconds A longer aperture may be set with the SENSe RTIMe APERture command Example Command Query Response Description MEAS2 ARR NDUT Takes 1000 negative duty cyc
127. ommand Dictionary www vxitech com CAL Culate LIMit ENVelope DATA This command searches for all the input data values within an envelope of values defined as being above below or in between as set boundary of values Instrument specific command CAL Culate LIMit EN Velope DATA lt threshold1 gt lt threshold2 gt lt threshold1 gt 9 989999999999990e 99 to 9 989999999999990e 99 lt threshold2 gt 9 989999999999990e 99 to 9 989999999999990e 99 9 989999999999990e 99 9 989999999999990e 99 CALCulate LIMit ENVelope DATA N A Returns the lt threshold1 gt and lt threshold2 gt values This command searches for all the input data values within an envelope of values defined as being above below or in between a set of values The range of the envelope is determined by the lt threshold1 gt and lt threshold2 gt values For example e If the lt threshold2 gt is greater than the lt threshold1 gt the range of data values searched for is above the lt threshold1 gt value or below the lt threshold1 gt value e If the lt threshold2 gt is less than lt threshold1 gt the range of data values searched for is between the lt threshold1 gt and lt threshold2 gt When When Threshold lt Threshold gt Threshold gt Threshold gt Threshold Threshold Threshold Thresholds Command Query Response Description CALC LIM ENV 1000 5000 Sets an envelope value
128. on operation is complete Set when the instrument changes its function or range Cleared when the all circuitry has settled Set when the instrument is auto ranging Cleared when the input range has been found 1 Setting 2 Ranging 3 Sweeping Not used 4 Measuring Set when an INITiate command is executed Cleared when the command is complete or aborted 5 Triggering Not used 6 Arming Set when the instrument is waiting for an arm signal Cleared when the arm is received 7 Correcting Set when the instrument is performing an auto zero operation Cleared when the auto zero operation is complete 8 Testing User 1 Set when the instrument is performing a self test Cleared when the self test is complete 9 Testing User 2 Set when the instrument is in the process of aborting an operation Cleared when the abort is complete 10 User 3 Not used 11 User 4 Not used 12 User 5 Reserved 13 Instrument Not used Summary 14 Program Running Not used 15 Reserved Always 0 Example Command Query Response Description STAT OPER COND 16 Makes a measurement 0010 hex MEASure READ INITiate ABORt Related Commands VM2164 Command Dictionary 145 VXI Technology Inc STA Tus OPERation ENABle Purpose Sets the Operation Status Register s enable register Type Required SCPI command
129. ples Command Query STAT QUES COND Response Description Related Commands N A VM2164 Command Dictionary 151 VXI Technology Inc STATus QUEStionable ENABle Purpose Sets the Questionable Status Enable Register Type Required SCPI command Command Syntax STATus QUEStionable ENABle lt NRf gt Ae lt NRf gt numeric ASCII value from 0 to 32767 RST Value lt NRf gt must be supplied Query Syntax STATus QUEStionable ENABle Query Parameters N A Query Response lt NRf gt Numeric ASCII value from 0 to 32767 Description The command sets the bits in the Questionable Data Signal Register s enable register to be reported to the summary bit sets Status Byte Register bit 3 to true The Status Questionable Enable query reports the contents of the Questionable Data Signal Register s enable register then clears the register contents and enters the value into the computer Examples Command Query STAT QUES ENAB 64 STAT QUES ENAB 64 Related Commands N A 152 VM2164 Command Dictionary www vxitech com STATus QUEStionable EVENt Purpose Queries the Questionable Status Event Register Type Required SCPI query Command Syntax N A Command Parameters N A RST Value N A Query Syntax STATus QUEStionable EVENt Query Parameters N A Query Response Decimal number Description The quer
130. ponse Description ARM STOP SOUR CAT CONF ARR FREQ 512 ARM SOUR BUS ARM STOP SOUR BUS INIT FETC COUN TRG FET COUN FETC COUN TRG FETC COUN BUS COUNTER CTR_EXTARM TTLTRGO TTLTRG1 TTLTRG2 TTLTRG3 TTLTRG4 TTLTRGS TTLTRG6 TTLTRG7 HOLD IMMEDIATE INTERNAL LEVEL Sets the ARM source to BUS Sets the disarm source to BUS 23 47 53 Related Commands ARM SEQuence2I STOP LA Yer SOURce ARM SEQuence2I STOP LA Yer SOURce CATalog DELayable ARMC SEQuence2I STOP LA Yer SOURce CATalog FIXed VM2164 Command Dictionary 3 VXI Technology Inc ARM SEQuence2I STOP LA Yer SOURce CA Talog DELayable Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands Lists all delayable trigger sources available for use with ARM STOP SOUR command Instrument specific query N A N A N A ARM SEQuence2I STOP LA Yer SOURce CATalog DELayable N A BUS CTR_EXTARM TTLTRGO TTLTRG1 TTLTRG2 TTLTRG3 TTLTRG4 TTLTRGS TTLTRG6 TTLTRG7 Lists all delayable trigger sources available for use with ARM STOP SOUR command This command specifies the stop arming source for the counter Command Query Response Description ARM STOP SOUR CAT DEL BUS COUNTER CTR_EXTARM TTLTRGO TTLTRGO TTLTRGO TTLTRGO TT
131. ptional DEFault argument is used then the default value of aperture mode will be returned instead This command sets the counter to make a measurement for a length of time APERture or for a number of cycles of the input signal EVENTs Some functions however do not have the APERture and or EVENts modes Those functions ignore this mode setting CONFigure and MEASure commands set the mode to APERture Note Event mode with greater than event is invalid for Time Interval with Delay Duty Cycle or Phase Angle measurements Command Query Response Description SENS MOD EVEN Sets mode to events SENS MOD EVEN Queries for the current mode CONFigure MEASure 134 VM2164 Command Dictionary www vxitech com SENSe TINTerval DELay EVENTs Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command sets the number of events to use for the time interval with delay Instrument specific command SENSe TINTerval DELay EVENTs lt event delay gt lt event delay gt 1 to 9e15 1 SENSe TINTerval EVENts N A Returns the current value of the time interval delay by events of the default minimum or maximum value This command sets the number of events to use for the time interval with delay Command Query Response Description SENS TI
132. re structured to allow multiple branches off the same trunk to be used without repeating the trunk To use this facility terminate each branch with a semicolon For example CALibration SECure CODE and CALibration SECure STATe are both branches off the CALibration trunk and can be combined as follows CALibration SECure CODE lt string gt STATe lt boolean gt lt string gt The above command is the same as the these two commands CALibration SECure CODE lt string gt CALibration SECure STATe lt boolean gt lt string gt See the Standard Commands for Programmable Instruments SCPI Manual Volume 1 Syntax amp Style Section 6 for more information VM2164 Command Dictionary 23 NOTATION VXI Technology Inc The SCPI commands in this section are listed in upper and lower case Character case is used to indicate different forms of the same command Keywords can have both a short form and a long form some commands only have one form The short form uses just the keyword characters in uppercase The long form uses the keyword characters in uppercase plus the keyword characters in lowercase Either form is acceptable Note that there are no intermediate forms All characters of the short form or all characters of the long form must be used Short forms and long forms may be freely intermixed The actual commands sent can be in upper case lower case or mixed case case is only used to distinguish short and long form for
133. requency ARM STOP SOUR TTLTO INIT Initiates the measurement FETC COUN 0 Returns the number of measurements ARM IMM Arms counter to take an immediate measurement FETC COUN 1 CONFigure commands SENSe commands 100 VM2164 Command Dictionary www vxitech com FETCh TOTalize Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This query returns the total counts from Channel 1 and 2 Instrument specific query N A N A N A FETCh TOTalize N A N A The totalize measurement returns two integers of up to 15 digits each The first integer is the total counts from input Channel and the second integer is the total counts from input Channel 2 Command Query Response Description MEAS TOT 9 179000000000000e 03 0 000000000000000e 00 FETC 6 271005500000000e 08 0 000000000000000e 00 FETC 7 216138500000000e 08 0 000000000000000e 00 FETC 8 170426200000000e 08 0 000000000000000e 00 FETC 1 005015850000000e 09 0 000000000000000e 00 FETC 1 121600670000000e 09 0 000000000000000e 00 ABORT CONFigure commands SENSe commands VM2164 Command Dictionary 101 VXI Technology Inc FETCh VOLTage Purpose Type Command Syntax Command Parameters RST Value Query Syntax Que
134. rform improperly Command Query Response Description CAL TEC STOP 5 92e 11 Sets the start slope adjustment CAL TEC STOP 5 92e 11 Returns the start slope adjustment value Related Co and CALibration SECure CODE CALibration SECure STATe VM2164 Command Dictionary 87 VXI Technology Inc CALibration TINTerval OFFSet This command compensates for the differences between Channel and Channel 2 Instrument specific command CALibration TINTerval OFFSet lt offset_val gt lt offset_val gt all real numbers N A CALibration TINTerval OFFSet N A Returns the set lt offset_val gt parameter This command compensates for the differences between Channel and Channel 2 created by differences in circuitry and their components personnel Changing these values incorrectly can cause the i Calibration commands should only be executed by qualified instrument to perform improperly Command Query Response Description CAL TINT OFFS 1 44e 9 Sets the time interval offset CAL TINT OFFS 1 44e 9 Returns the set time interval offset value CALibration SECure CODE CALibration SECure STATe 88 VM2164 Command Dictionary www vxitech com CONFigure 1 2 SCALar ARRay NDUTy cycle PDUTCyclelDCY Cle ose This command configures a positive or negative duty cycle measurement Instrument specific command 0 and 2 CONFigure 1 2
135. riod of the input signal should be used instead of the expected rise fall time This measurement uses both comparators of the input channel If a reference value is specified and INPut SETup AUTO is set to OFF INPut SETup AUTO will be set to ONCE If a reference value is not specified the input channel comparator 1 level will be set to 0 25 V for a rise time measurement For fall time the reverse is set Command Query Response Description CONFigure SENSe VM2164 Command Dictionary 119 VXI Technology Inc MEASure 1 2 SCALar ARRay TINTerval Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Command Sets the counter to make a time interval measurement and fetch the result Instrument specific query N A N A N A MEASure 112 SCALar l ARRay TINTerval N A This command will modify the following e function set to TINT e aperture described below e aperture events mode set to APERture Sets the counter to make a time interval measurement and fetch the result This measurement is made between input Channels 1 and 2 The MEASure suffix selects the input channel for the beginning of the interval and by default the end of the interval will be from the remaining channel The measurement is made from the first detected rising edge on the first chan
136. rns pass fail information The TEST subsystem handles the self test operations of the instrument The counter self test tests the counter memory the Read Write hardware control registers analog front end and a 2 5 MHz test signal The query returns pass fail information In a failed situation additional failure information can be obtained with the SYStem ERRor or query Command Query Response Description TEST ALL CTR Self test Passed CTR Self test Failed Initiates the counter self test operation and returns either a pass or fail message TST VM2164 Command Dictionary 143 VXI Technology Inc UNIT ANGLe Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Command The UNIT subsystem command specifies the units for the phase measurements as either degrees or radians and determines whether the units will be positive or centered around zero Instrument specific command UNIT ANGL e lt units gt lt zero gt lt units gt DEGREE or RADIAN lt zero gt MINIMUM or CENTER or AUTO lt units gt RADIAN lt zero gt MINIMUM UNIT ANGLe N A DEG or RAD MIN or CENT or AUT This command specifies the units for the phase measurement as either degrees or radians and determines whether the units will be positive or centered around zero MINi
137. ry Parameters Query Response Description Example Related Commands This query sets up to return the results of the pervious voltage measurement Instrument specific query N A N A N A FETCh VOLTage lt volt_func gt lt count gt lt start gt lt step gt lt volt_func gt AC DC MINimum MAXimum PTPeak lt count gt 1 to 1000 lt start gt 1 to 1000 lt step gt 1 to 1000 See Description Sets up to return the results of the previous voltage measurement If a single voltage measurement has been made any other voltage function results may be fetched If an array of voltage measurements have been made only the results of the requested voltage measurement function may be fetched The default value lt count gt is the number of measurements requested for the array The default value of lt start gt is 1 The default value of lt step gt is 1 The number of values returned is lt count gt The first of the values returned is value lt start gt Then every lt step gt values after start are returned If a single measurement is made the format of the returned voltage is e n nnnmn lt lf gt If an array measurement is made the format of the returned values is e abbrn nnnnesxx rn nnnnesxx rm nnnnesxx lt 1f gt where e a number of b digits e b number of characters in the returned data not including abb e r or space e n value e s or e
138. s configuration is desired the address switch should be set for a value of 255 Upon power up the slot 0 resource manager will assign logical addresses to each instrument in the VMIP module 22 VM2164 Preparation for Use www vxitech com SECTION 3 COMMAND DICTIONARY INTRODUCTION This section presents the instrument command set It begins with an introduction to the Standard Commands for Programmable Instruments SCPI programming language detailing proper syntax and explaining SCPI nomenclature The introduction is then followed by an alphabetical listing of all the commands supported by the VM2164 Counter Timer The remainder of this section is devoted to describing each command one per page in detail The description is presented in a way to assist the user in the use of each command Every command entry describes the exact command and or query syntax the use and range of parameters and a description of the command s purpose THE SCPI PROGRAMMING LANGUAGE The VM2164 is a VXIbus message based device whose command set is compliant with the SCPI programming language All module commands are sent over the VXIbus backplane to the module Commands may be in upper lower or mixed case All numbers are sent in ASCII decimal unless otherwise noted The SCPI programming language is a tree structured language based on IEEE STD 488 2 Specifications It utilizes the IEEE STD 488 2 Standard command and the device dependent commands a
139. s have completed Examples Command Query Response Description Sets the OPC bit in the Event Status Register 1 Returns the value of the Event Status Register Related Commands 36 VM2164 Command Dictionary www vxitech com RST Purpose Resets the module s hardware and software to a known state Type IEEE 488 2 Common Command Command Syntax RST MMe ere N A RST Value N A Query Syntax N A Query Parameters N A Query Response N A Description The Reset RST command resets the module s hardware and software to a known state See the command index at the beginning of this chapter for the default parameter values used with this command Examples Command Query Response Description RST Resets the module Related Commands N A VM2164 Command Dictionary 37 VXI Technology Inc SRE Purpose Sets the service request enable register Type TEEE 488 2 Common Command Command Syntax SRE lt mask gt Command Parameters lt mask gt Numeric ASCII value from 0 to 255 RST Value None required parameter Query Syntax SRE Query Parameters N A Query Response Numeric ASCII value from 0 to 255 Description The Service Request Enable SRE mask is used to control which bits in the status byte generate back plane interrupts If a bit is set in the mask that newly enables a bit set in the status byte and interrupts are
140. seceseeeeecececeeeeaeeeseeeeeeeseneeeeneeeeenaes 94 CONFigure 11213 SCALar ARRay FREQuUency cceceesseesceescesceeseeseecseceaeceaecaeecaeeenecaaecaeeeeeseeenseeneenaeenaes 95 VM2164 Preface www vxitech com CONFigure 11213 SCALar l ARRay FREQuency RATI0 0 ceesceceseceescecesreesceceeeeeeneeceeeeeneeceeeecueceeeeeeeneeees 96 CONFigure 11213 SCALar l ARRay PERI0d cccececeseesseesecsceceeceeeesecseceseceaeceaecaeceaeesaeeeneeeneeeseneeeneeeeeeares 97 CONFigure 112 10120 SCALar l ARRay TOT alize ccececcceessessceseeesceeeecesecaecaecaeecaeesaecneeceeesereereneeeaeenaes 98 BET Ch lt funGtion gt E cvescsvensaedintsic vhewexsesuc A aa 99 FETCRCOUN EA o eee Recta a He res ek Males e E 100 BET Ch TO Tali ze rd ci dase de ces tus Gases des Satine dad da fuse utua E Esa Dedo oes Goatees 101 FET ChE VOLT age liinda Genesis dada 102 INTHate C OON O S O coe at etd eh SG eR E aa 103 INI TViate IMMe diate iccscsezseqceiss lin did idad ii cidcid 104 INPut 112 ATTenuation DEFault MINimum MAXimum ooccoooccnonnnonnnononnnonnncononononncnonnnnnnncnonnnnncco nn nnnnnnos 105 INPut 11 2 COMParator 1 2 LEVel RELative cccccscccsssecsscessececssesesscecsseeeseeecseesseecesseseeeeecaeceeseecsaeseaeees 106 INPut 11 2 COMParator 1 2 SLOPe DEFault ccc cccccccsesssecessecesscecsseceseeecsseceseecscseseeeeecsaeeeeeeecsaeseeees 107 INPutt121 COU Plana A ao 108 INPut 112 FIE Ter FREQ
141. signal s peak to peak levels The signal s 10 and 90 points are sued for rise and fall time measurements Trigger Error seconds Einput RMS Noise of the Input 2 2 E input as ESianal Input Slew rate E Trigger point Esignar is the input signal noise 1x lt 2 mVrms 500 yVrms typical 10x lt 20 mVrms 5 mVrms typical Trigger Level Timing Error 1x 7 12 5mV dE 12 5 mV Input Slew Rate at Start Input Slew Rate at Stop 10x 125 mV 125 mV 7 Input Slew Rate at Start Input Slew Rate at Stop Base Resolution and Accuracy tres 50 ps tace 0 4 ns typical 0 8 ns worst case Differential Channel Error 100 ps VM2164 Introduction www vxitech com CHANNEL 3 INPUT OPTION 17 Frequency Range 150 MHz to 3 0 GHz Sensitivity 150 MHz 2 4 GHz 25 dBm to 19 dBm 2 4 GHz 3 0 GHz 19 dBm to 19 dBm Impedance 500 Input Coupling AC Input Damage Level 5 Vrms Frequency 10 MHz Coupling DC Output Impedance 500 Output Level Low lt 0 8 V into gt 10kQ Output Level High gt 4 2 V into gt 10kQ Gate Time Programmable from 200 us to 99 9999 s Frequency 10 MHz Coupling AC Input Impedance 1kQ Voltage Range 500 mVrms to 12 Vrms Input Damage Level 15 Vrms Coupling DC Impedance 1kQ Input Threshold 1 3 V fixed Input Signal Level gt 500 mVp p about the input threshold Pulse Width 50 ns Transition Time lt 250 ns Input Any VXIbus TTL Trigger line may be selected for arming R
142. signal is determined assuming either a DC signal or a repetitive signal with a frequency of at least 1000 Hz The user must select the proper INPut COUPling and INPut IMPedance separately The voltage measurements are calculated as follows AC maximum minimum 2 828 DC maximum minimum 2 MAXimum maximum MINimum minimum PTPeak maximum minimum These commands will modify the following e input setup no effect e function set to AC DC MIN MAX or PTP e autosetup mode no effect e aperture events mode no effect The actions of these commands are modified by the following e lt expected value gt no effect e lt resolution gt no effect e autosetup mode no effect e aperture events mode no effect See CONFigure 112 10120 SCALar ARRay TOTalize for example MEASure commands SENSe commands 94 VM2164 Command Dictionary www vxitech com CONFigure 11213 SCALar l ARRay FREQuency Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command configures the counter to measure the frequency of the signal on the CONFigure suffix input channel Instrument specific command CONFigure 1 2 3 SCALar ARRay FREQuency lt array size gt lt expected value gt lt resolution gt lt array size gt 1 to 1000 I
143. stop 1 Calculate the frequency of the plateau XCNTR phase YCNTR phase 1 x 0 0000001 TECA phase x CALTAR TECB phase x CALSTOP CALOFFS Set freqsumplateau freqsumplateau frequency phase If phase 359 then set phase 1 Set Counter Counter 1 Repeat steps 3 82 through 3 85 until phase phasestart 1 Set freqavgplateau freqsumplateau Counter Set Counter 0 Set phase phasestart 10 Calculate the frequency by using the equation XCNTR phase YCNTR phase 1 x 0 0000001 TECA phase x CALTAR TECB phase x CALSTOP CALOFFS Set freqsum freqsum frequency phase If phase 359 then set phase 1 If phase phasestop 10 then set phase 359 Set Counter Counter 1 Repeat steps 3 90 through 3 94 until phase 359 Set freqavg freqsum Counter Set Temp freqavg freqavgplateau If freqavg gt freqavg 0 001 and freqavg lt freqavg 0 001 then set done 1 If done 0 and freqavgplateau gt freqavg then CALSTOP CALSTOP 0 000000000000001 3 100 If done 0 and freqavgplateau lt freqavg then CALSTOP CALSTOP 0 000000000000001 3 101 Disable security by issuing command CAL SEC STAT 0 0VM2164 3 102 Set the TEC StartTec by issuing command CAL TEC STAR amp Str CALSTAR 3 103 Set the TEC StopTec by issuing command CAL TEC STOP amp Str CALSTOP p 3 104 Store offs
144. strument specific command CALibration TEC STARtslope lt startslope gt lt startslope gt all real number N A CALibration TEC STARtslope N A Returns the set lt slope gt parameter value Calibrates one of three factors used by the TEC circuitry These factors are the start slope the stop slope and the offset personnel Changing these values incorrectly can cause the f Calibration commands should only be executed by qualified instrument to perform improperly Command Query Response Description CAL TEC STAR 5 92e 11 Sets the start slope adjustment CAL TEC STAR 5 92e 11 Returns the start slope adjustment value CALibration SECure CODE CALibration SECure STATe 86 VM2164 Command Dictionary www vxitech com CALibration TEC STOPslope P ose Calibrates one of three factors used by the TEC circuitry Instrument specific command 0 and a CALibration TEC STOPslope lt stopslope gt 0 and Paramete lt stopslope gt all real numbers R alue N A Que a CALibration TEC STOPslope Query Paramete N A Query Response Returns the set lt stopslope gt parameter value De 0 Calibrates one of three factors used by the TEC circuitry These factors are the start slope the stop slope and the offset personnel Changing these values incorrectly can cause the f Calibration commands should only be executed by qualified instrument to pe
145. t expected value gt argument is used the expected period of the input signal should be used not the expected pulse width This measurement uses both comparators of the input channel The reference value is used to set the comparator threshold level to a percentage of the peak to peak signal If a reference value is specified and INPut SETup AUTO is set to OFF then INPut SETup AUTO is set to ONCE If a reference value is not specified the input channel comparators 1 and 2 levels will be set to 0 V This command will modify the following e function set to PWID or NWID e aperture described below e aperture events mode set to APERture The input channel attenuation offset gain level and slope can be modified If neither of the optional arguments are used e aperture is set to the default value If only the lt expected value gt argument is used e aperture is set to the default value If both lt expected value gt and lt resolution gt are used the aperture is calculated as follows apperature py 6 os expected log resolution with a minimum of le 8 and a maximum of 5 seconds A longer aperture may be set with the SENSe APERture command See CONFigure 112110 20 SCALar ARRay TOTalize for example MEASure commands SENSe commands 90 VM2164 Command Dictionary www vxitech com CONFigure 112 SCALar l ARRay PHASe This command configures a phase measurement Instrument spec
146. termines at which point in memory values will start to be calculated The optional lt step_size gt parameter determines the number of measurements to skip before taking a value to be used Note In order to specify a lt step_size gt the lt count gt and lt offset gt information must be entered first Command Query Response Description CALC SDEV Calculates and returns the standard deviation on a set of data VM2164 Command Dictionary 69 VXI Technology Inc CAL Culate TRANsform HISTogram ABOVe Purpose This query returns the number of points above the maximum value in a histogram calculation Type Instrument specific query Command Syntax N A Command Parameters N A RST Value N A Query Syntax CAL Culate TRANsform HISTogram ABOVe Query Parameters N A Query Response Returns the number of points above the maximum value in a histogram calculation Description Returns the number of points above the maximum value in a histogram calculation Example Command Query Response Description CALC TRAN HIST RANGE AUTO OFF CALC TRAN HIST RANGE 10 50 CALC TRAN HIST ABOV Turns off auto ranging Sets the range of the histogram calculation for 10 50 Returns the number of data points above 50 Related Commands 70 VM2164 Command Dictionary www vxitech com CAL Culate TRA
147. the input block signal coupling for the specified channel X AC AC or DC INPut 112 FILTer FREQuency This command sets the frequency of the low pass filter x 20e6 below 30 MHz 100e6 at or above 30 MHz INPut 112 FILTer STATe This command sets the input block signal low pass filter state for the selected X ON channel to ON or OFF INPut 112 IMPedance This command sets the input terminating impedance for the specified channel 1000000 000000 1e6 INPut 112 SETup This command sets up Input Channel 1 or 2 by specifying an expected peak to peak input voltage and optionally an expected input offset voltage INPut 112 SETup AUTO This command controls the auto setup of Input Channels 1 and 2 X ONCE TIO UYIITXA MMM 87 Areuonoid puvwuop Y9IZINA ALPHABETICAL COMMAND LISTING CONT INPut 112 SETup AUTO TIMe Description This command sets the duration of time that will be allowed for a signal to RST RST Value occur before a measurement is aborted when autotriggered ia 0 02 INPut 112 SETup TIMe This command sets the duration of time after an INITiate command that will be x 0 04 allowed for a signal to occur before a measurement is aborted MEASure 112 SCALar l ARRay DCYClelNDUTycyclelPDUTycycle This query performs a positive or negative duty cycle measurement x 1 MEASure 112 SCALar ARRay NWIDthIPWIDth This query config
148. the least significant bit while the switch located at position 8 is the most significant bit See Figure 2 1 for examples of setting the logical address switch ON ON O di osition alue AAUABEAA AAAWAAAA 12345678 12345678 1 1 SET TO 4 SET TO 8 2 2 3 4 4 8 ON ON 5 16 AAAWAW AW JOAO 6 32 12345678 12345678 7 64 SET TO 168 SET TO 255 8 128 Dynamic FIGURE 2 1 LOGICAL ADDRESS SWITCH SETTING EXAMPLES The VMIP may contain three separate instruments and will allocate logical addresses as required by the VXIbus specification revisions 1 3 and 1 4 The logical address of the instrument is set on the VMIP carrier The VMIP logical addresses must be set to an even multiple of 4 unless dynamic addressing is used Switch positions 1 and 2 must always be set to the OFF position Therefore only addresses of 4 8 12 16 252 are allowed The address switch should be set for one of these legal addresses and the address for the second instrument the instrument in the center position will automatically be set to the switch set address plus one while the third instrument the instrument in the lowest position will automatically be set to the switch set address plus two If dynamic address configuration is desired the address switch should be set for a value of 255 All switches set to ON Upon power up the slot O resource manager will assign the first available logical addresses to each instrument in the VMIP module If dynamic addres
149. to disable the security state the security code must be supplied To enable the security the code does not need to be supplied The security state is enabled by default Security can also be enabled without entering the lt string gt parameter by sending the CALibration SECure STATe 1 ON command Security cannot however be disabled using a CALibration SECure STATe 0 OFF command If this command is sent a Missing Parameter error will be returned personnel Changing these values incorrectly can cause the t Calibration commands should only be executed by qualified instrument to perform improperly Command Query Response Description CAL SEC STAT OFF 16VM2164 Disables calibration security CAL SEC STAT 1 Turns the calibration security back on CAL SEC STAT 1 Indicates that calibration security is enabled R ed Co and CALibration SECure CODE CALibration STORe VM2164 Command Dictionary 83 VXI Technology Inc CALibration STORe Stores calibration data into non volatile memory Instrument specific command CALibration STORe N A N A Q N A Q N A Q N A De The Calibration STORe command stores correction data into non volatile memory The correction data is calibration data that has been downloaded via the program messages in the Calibration Data subsystem The CALibration STORe command should only be performed after all the correction data h
150. two other high performance instruments on a single C Size card to form a customized and highly integrated instrument see Figure 1 1 This allows the user to reduce system size and cost by combining the VM2164 with two other instrument functions in a single wide C size VXIbus module Up to three VM2164s can also be combined together on a single VXIbus card making it an ideal choice for applications that require multi signal measurement functions such as in automotive or medical electronic test A powerful combination for any automated test set is our single VXIbus module VT2000 combining a 6 5 digit system DMM VM2710A a 200 MHz 1 ns universal counter VM2164 and a 50 MSample s arbitrary waveform function generator VM3640A Our single slot timer counter VM2164 plus a Rubidium standard VM3000 is another powerful combination FIGURE 1 1 THE VMIP PLATFORM VM2164 Introduction 13 ACC FAIL VXI Technology Inc Each VM2164 Counter Timer is treated as an independent instrument in the VXIbus chassis Each has its own unique Logical Address and its own front panel FAIL and ACC indicators The ACC ACCESS LED flashes when read write commands are being sent to the module The FAIL LED glows green to indicate that the board is receiving power This LED glows red when a fail condition has occurred PROGRAMMING The VM2164 is programmed using message based word serial protocol The commands are SCPI
151. ue Query Syntax Query Parameters Query Response Description Example Related Commands This command controls the auto setup of Input Channels 1 and 2 Instrument specific command INPut 1I2 SETup AUTO lt auto gt lt auto gt ON OFF ONCE ONCE INPut 1 2 SETup AUTO N A This command moves the current setting of autosetup to the output buffer The return values will be e OforOFF e IforON e ONCE for ONCE This command controls the auto setup of Input Channels 1 and 2 When ON each measurement will be preceded by an automatic setup of the input channel s involved in the measurement When OFF the current settings are used for the measurement For ARRay measurements the ONCE setting will cause an auto setup to occur only for the first measurements For SCALar measurements ONCE will cause an auto setup with each measurement Auto setup adjusts the input channel s attenuation offset and gain so that he input signals peak to peak voltage into the comparator is centered on about 80 of the range of the comparator INPut commands which manually set the input channel hardware other than COUPling IMPedance and FILTering will remain in effect when a measurement is initiated only if auto setup is set to OFF Command Query Response Description VM2164 Command Dictionary 113 VXI Technology Inc INPut 112 SETup AUTO TIMe Purpose Type Comma
152. ure may be set with the SENSe APERture command See CONFigure 1 12110 20 SCALar ARRay TOTalize for example ed Co and MEASure commands SENSe commands VM2164 Command Dictionary 89 VXI Technology Inc CONFigure 112 SCALar ARRay NWIDthIPWIDth Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This command configures the counter to measure the positive or negative pulse width time of the signal on the CONFigure suffix input channel Instrument specific command CONFigure 1 2 SCALar ARRay NWIDthIPWIDth lt array size gt lt pwidth reference gt lt expected value gt lt resolution gt lt array size gt 1 to 1000 lt pdwidth reference gt 10 to 90 lt array size gt 1 If SCALar is specified this parameter is no longer valid If ARRay is specified lt array size gt is a required parameter lt pdwidth reference gt 50 CONFigure N A Returns the current measurement configuration This includes any channels SCALar or ARRay settings and measurements selected This command configures the counter to measure the positive or negative pulse width time of the signal on the CONFigure suffix input channel The units of the lt reference gt are percentage The units of lt expected value gt and lt resolution gt are seconds If the l
153. ures the counter to measure the frequency of the signal on x 1 the CONFigure suffix input channel CONFigure 11213 SCALar I ARRay FREQuency RATio This command configures the counter to measure the ratio of the frequencies of ee X 1 the signals on the CONFigure suffix input channel and lt second channel gt CONFigure 11213 SCALar l ARRay PERiod This command configures the counter to measure the period of the signal on the x 1 CCONFigure suffix input channel CONFigure 112110120 SCALar ARRay TOTalize This command configures a totalized measurement FETCH This query returns the values of measurements FETCh COUNt This query returns the number of measurements completed X 0 FETCh TOTalize This query returns the total counts from Channel 1 and 2 FETCHh VOLTagel This query sets up to return the results of the pervious voltage measurement INITiate CONTinuous Verifies whether the counter is taking continuous measurements x 0 if not continuous 1 if continuous INITiate IMMediate This command initiates the current trigger sequence INPut 112 ATTenuation This command sets the input block signal attenuator for the specified channel X 1 INPut 112 COMParator 112 LEVel RELative This command sets the comparator threshold level voltage of the channel and x 0 comparator selected INPut 112 COMParator 112 SLOPe This command sets the slope for the selected input channel and comparator X POS INPut 112 COUPling This command sets
154. ures the counter to measure the positive or negative pulse width time of the signal on the MEASure suffix input channel l MEASure 112 SCALar l ARRay PHASe This query performs a phase measurement x 1 MEASure 112 SCALar l ARRay RTIMelFTIMelRISE TIMEIFALL TIME This query configures the counter to measure the rise and or fall time of the Array size signal on the MEASure suffix input channel x Low reference 10 High reference 90 MEASure 112 SCALar l ARRay TINTerval Sets the counter to make a time interval measurement and fetch the result MEASure 112 SCALar l ARRay VOLTage These queries configure the counter to measure the voltage on the MEASure x 1 suffix input channel MEASure 11213 SCALar Il ARRay FREQuency Configures the counter to measure the frequency of the signal on the MEASure x 1 suffix input channel MEASure 11213 SCALar l ARRay FREQuency RATio This query configures the counter to measure the ratio of the frequencies of the signals on the MEASure suffix input channel and lt second channel gt MEASure 11213 SCALar l ARRay PERiod Configures the counter to measure a period of the signal on the MEASure x 1 suffix input channel MEASure 112110 20 SCALar TOTalize This query performs a totalize measurement OUTPut CLOCk This command toggles the External Reference as a useable reference clock X 1 OUTPut TTLTrg This command selects the TTL trigger line that will receive the output X 0 O
155. voltage measurement ARM STOP SOUR TTLTO Sets the disarm source to TTLTO ARM STOP ECO 100 Sets the number of stop arm signals that will lead to disarming the counter INIT Begins the measurement ARM STOP ECO 1 000000000000000e 02 54 VM2164 Command Dictionary www vxitech com ARM SEQuence2 STOP LA Yer MMediate Purpose Causes a one time exit by the counter from the armed state Type Instrument specific command Command Syntax ARM SEQuence2I STOP LA Yer MMediate Command Parameters N A RST Value N A Query Syntax N A Query Parameters N A Query Response N A Description This command causes a one time exit by the counter from the armed state without receiving the specified stop arm signal Example Command Query Response Description CONF FREQ Configures the counter to read frequency ARM STOP SOUR TTLTO Sets the disarm source to TTLTO INIT FETC COUN 0 ARM STOP IMM FETC COUN 0 Related Commands VM2164 Command Dictionary 55 VXI Technology Inc ARM SEQuence2 STOP LA Yer SOURce Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands Selects or queries the stop arming source to be used when the counter is initiated Instrument specific command ARM SEQuence2 STOP LA Yer
156. w vxitech com INDEX envelope of values ooooooonconccconconoccnnnconcnnnoncnnnrononacnnon 61 SENA sri 23 O A A ET 32 explosive atmosphere oococcocnoncononnnoncnncnnconncnnonacnnos 10 E 33 External Arm Signal oooononcnncnicnnnnnnnonconcnnnnnnnononacnnos 48 ESP ae ei eee 34 F FDN rhan r T a aE 35 OP Cu A r T A e tent 36 BAT eien e RRT N 14 IRS Toela tae cet a 37 130 faled VADO iii 64 ES RE sacos bis ris 38 first integet necesari eeaeee eerie i Eki Ro 101 PSTB Ines 39 fixed ATM SQUICE n on i rioei iurarien 45 A E EE S 40 FIXED SSSR TO 52 59 TS iras 41 Frame or chassis ground oooooonccnocccncononnnancnncnnnonannnonos 9 IWAL td ao 42 G A grounding CONAUCT OT oooonccnoccconoconocnnonnncnnncnnnonncnanonns 10 ACCESS us A 14 I arm signal oenen e 44 46 47 53 55 armed edi a 46 54 55 NICO 35 A EE EE EELEE E AE eee 14 arming signal saiae a i i as 53 54 input block signal ooonoonncnnnnnncninnncnnonoso 105 108 110 A ose rien iat oe rin e aiaei 45 input filtering oooooonncnnncnnonnncnnonononcnnncanncononnnos 138 139 auto Setup 91 113 119 120 121 123 124 ME ica EE 101 automated calibration ooooicononnnnicnocnnncononononnnonann no 14 K a Ko Word caitlin E A E A 24 backplane iirinn cisnes a 22 23 L backplane jumpers ocoococonoccnonacononononaconcnnnonnannnoss 21 22 boundary of values c ooooonncnocnnoncconcnonoconononcnnncnncnnnono 61 last mteaa a e ere aai eE R eR n 73 c himt test A e ar E aa
157. with the ARM SOUR command that are fixed Specifies the fixed start arming source for the counter Command Query Response Description ARM SOUR CAT FIX HOLD IMMEDIATE CTR_CHAN2 ARM SEQuence 1 I STARt LA Yer SOURce ARM SEQuence 1 I STARt LA Yer SOURce CATalog ALL ARM SEQuencel I STARt LA Yer SOURce CATalog DELayable 52 VM2164 Command Dictionary www vxitech com ARM SEQuence2I STOP LA Yer DELay Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands Specifies a time delay to occur after receipt of a stop arm signal prior to actually disarming the counter Instrument specific command ARM SEQuence2I STOP LA Yer DELay lt time_delay gt lt time_delay gt 0 to 65 535 seconds in 1 us steps 0 seconds pass through ARM SEQuence2I STOP LA Yer DELay N A Returns the set lt time_delay gt parameter value This command specifies a time delay to occur after receipt of a stop arm signal prior to actually disarming the counter If the stop arming source selected is fixed i e HOLD IMMEDIATE TIMER CTR_CHAN2 this command will have no effect on the counter arming This command always zeros the event count delay so specifying a delay of zero places the arm subsystem in pass through mode In this mode the instrume
158. xample Related Commands This query calculates and returns the maximum value of a set of data Instrument specific query N A N A N A CAL Culate MA Ximum lt count gt lt offset gt lt step_size gt lt count gt 1 to 1000 lt offset gt 1 to 1000 lt step size gt 1 to 1000 Returns the maximum value for a set of data This query calculates and returns the maximum value of a set of data The lt data_index gt returned indicates the data point in memory where the maximum value is The lt max_value gt returns the value of the maximum data point If no valid data values were found then No Data will be returned The optional parameters are for comparing selected values in the memory buffer The optional lt count gt parameter specifies the number of data points to compare If lt count gt is not specified the number measured last will be used as the default The optional lt offset gt parameter determines at which point in memory values will start to be searched The optional lt step_size gt parameter determines the number of measurements to skip before taking a value to be compared Note In order to specify a lt step_size gt the user must enter the lt count gt and the lt offset gt information Command Query Response Description CALC MAX Returns the maximum value for a set of data 66 VM2164 Command Dictionary www vxitec
159. xitech com ARM SEQuence1 I STARtD LAYer SOURce CATalog DELayable Purpose Lists all delayable trigger sources available for use with the ARM SOUR command Type Instrument specific query Command Syntax N A Command Parameters N A RST Value N A Query Syntax ARM SEQuence1 I STARt LA Yer SOURce CATalog DELayable Query Parameters N A Query Response BUS COUNTER CTR_EXTARM TTLTRGO TTLTRG1 TTLTRG2 TTLTRG3 TTLTRGA TTLTRGS TTLTRG6 TTLTRG7 gt Description Lists all trigger sources available for use with the ARM SOUR command which are delayable Specifies the delayable start arming source for the counter Example Command Query Response Description ARM SOUR CAT DEL BUS COUNTER CTR_EXTARM TTLTRGO TTLTRG1 TTLTRG2 TTLTRG3 TTLTRG4 TTLTRGS TTLTRG6 TTLTRG7 Related Commands ARM SEQuencel I STARt LA Yer SOURce ARM SEQuence1 I STARt LA Yer SOURce CATalog ALL ARM SEQuencel I STARt LA Yer SOURce CATalog FIXed VM2164 Command Dictionary 51 VXI Technology Inc ARM SEQuencel1 I STARt LA Yer SOURce CA Talog FIXed Lists all fixed trigger sources available for use with the ARM SOUR command Instrument specific query N A N A N A ARM SEQuence1 I STARt LA Yer SOURce CATalog FIXed N A HOLD IMMEDIATE CTR_CHAN2 Lists all trigger sources available for use
160. y Response Description CALC MED Returns the median value for the data set VM2164 Command Dictionary 67 VXI Technology Inc CALCulate MINimum Purpose Type Command Syntax Command Parameters RST Value Query Syntax Query Parameters Query Response Description Example Related Commands This query calculates and returns the minimum value of a set of data Instrument specific query N A N A N A CAL Culate MINimum lt count gt lt offset gt lt step_size gt lt count gt 1 to 1000 lt offset gt 1 to 1000 lt step size gt 1 to 1000 Returns the minimum data point for the set of data This query calculates and returns the minimum value of a set of data The lt data_index gt returned indicates the data point in memory where the minimum value is The lt min_value gt returns the value of the minimum data point If no valid data values are found then No Data will be returned The optional parameters are for comparing selected values in the memory buffer The optional lt count gt parameter specifies the number of data points to compare If lt count gt is not specified the number measured last will be used as the default The optional lt offset gt parameter determines at which point in memory values will start to be searched The optional lt step_size gt parameter determines the number of measurements to skip befor
161. y reports the bits set in the event register of the Questionable Data Signal register This command reads the event register then clears all bits in the event register and enters the value into the computer Examples Command Query Response Description STAT QUES 0 Related Commands N A VM2164 Command Dictionary VXI Technology Inc 154 VM2164 Command Dictionary www vxitech com VM2164 Command Dictionary 155 VXI Technology Inc SECTION 4 CALIBRATION AND VERIFICATION RELATED DOCUMENTS Test FRM Visual Basic Form Visa32 BAS Visual Basic Module National Instruments Niglobal BAS National Instruments Vbib 32 BAS Visual Basic Interface Bus MyGlobal BAS Vtvm3616 BAS VXIplug play Instrument Driver EQUIPMENT USED Synthesizer Function Generator Critical specifications Recommended Model Voltage Source Critical specifications Recommended Model VXI Chassis VXI Slot 0 and associated computer 300 MHz Oscilloscope 1x Oscilloscope Probe Function Generator Isolated Adjustment Screwdriver Input Capacitance Normalizer Coax Cable BNC Plug to SMB Plug METHOD Square wave 10 MHz 10 000 000 000 0 001 Hz HP Model 3325A Can Source 20 to 20 VDC 0 003 Minimum 1 Channel VM3616 VTI CT 100B or equivalent Tek TDS3032 or equivalent Tek 6101B or equivalent HP 3325A or equivalent Voltronics P N TT 400 VTI P N 52 0303 000 Pasternack P N PE3746 3

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