TRIGgerSTARtCOUNt count SENSechan SWEepPOINts count | HP E1429A

Note An active reference clock (oscillator) is required for the digitizer to recognize and accept arm signals.

Setting the Trigger The trigger count is the total number of readings (pre- and post-arm) per Count arm event. The trigger count is normally set by the <size > parameter of the

CONFigure and MEASure commands. However, when you want to change the total reading count without entirely re-configuring the digitizer, the reading count (trigger count) can be set with either of the following commands:

TRIGger[:STARt]:COUNt <count >

SENSe[<chan >]:SWEep:POINts <count >

Setting the Pre-Arm Reading Count

Sending an Immediate Trigger

Pre-arm readings are samples the digitizer takes before an arm signal is accepted. Pre-arm readings start after the digitizer receives the INITiate[:IMMediate] command. Readings continue until the pre-arm reading count is reached, and until the arm is received. The command which sets the minimum number of pre-arm readings is:

SENSe[<chan >]:SWEep:OFFSet:POINts <count >

<count > is specified as a negative number. You must specify at least three pre-arm readings and seven post-arm readings. Refer to the SENSe subsystem in Chapter 4 - "Command Reference" for more details on setting the pre-arm reading count.

If the pre-arm reading count is reached and the arm has not occurred, the readings continue and overwrite previous readings. When the arm occurs, the most recent number of <count> readings are stored in memory. If an arm occurs before the pre-arm reading count is reached, the arm is ignored and error -212 "Arm ignored" is generated.

In some applications the user may want to manually issue a sample trigger. This is accomplished with the command:

TRIGger[:STARt][:IMMediate]

When the digitizer is armed (wait-for-trigger state), executing TRIG:STAR:IMM takes a reading regardless of the specified trigger source. The trigger count is decremented by 1 and the selected trigger source remains unchanged. TRIG:STAR:IMM is often used with TRIG:SOUR:HOLD to suspend triggering until the trigger is issued by TRIG:STAR:IMM.

Chapter 3

Understanding the HP E1429 Digitizer 125

Image 125

HP E1429A manual TRIGgerSTARtCOUNt count SENSechan SWEepPOINts count

Contents

Contents HP E1429A/B Digitizer User’s Manual Contents ARM Data Period Value Table ESR? Contents HP E1429A/B Digitizer User’s Manual HP E1429A/B Digitizer User’s Manual Contents HP E1429A/B 20 MSa/s 2-Channel Digitizer User’s Manual Documentation History According to ISO/IEC Guide 22 and EN March 1 HP E1429A/B 20 MSa/s 2-Channel Digitizer User’s Manual HP E1429A/B Features and VXIbus Configuration Chapter Contents Getting Started Chapter HP E1429A/B VXIbus Configuration HP E1429A/B VXIbus Configuration Digitizer Logical Address Assigning the Digitizer to a CommanderPreparation for Use HP E1429A/B Logical Address Switch Location Bus Request Level Guidelines Installing the DigitizerDigitizer Bus Request Level Addressing the Digitizer over HP-IB Addressing the Digitizer using an Embedded Controller HEWLETT-PACKARD,E1429A,0,A.02.00 Sending the *IDN? CommandIntroductory Programs TST? IOOUTPUTSADDR, *IDN? Repeat Output 70905SYSTERR? SLFTST.C IOOUTPUTSADDR, *TST? Resetting Clearing DigitizerIOOUTPUTSADDR, SYSTERR? IOOUTPUTSADDR, DIAGTEST? IOOUTPUTSADDR, *RST*CLS Subend LRN? Querying Digitizer ConfigurationInteger Repeat LRN.C Chapter Getting Started TRIGSTARTIM1 10E-6 Instrument and Programming Languages OUTPEXT1STAT Ontrigsour EXT1OUTPEXT1STAT OFF Language Programs Microsoft QuickC clhpib.lib Command Line Compiling∙ Microsoft QuickC ∙ Turbo C++ CLHPIB.LIB Compiling in the Integrated Environment Other subsystems Introduction to Programming Using the MEASure CONFigure Commands Port HP E1429A Programming Sequence Programming Sequence How to Make Measurements Using MEASureConfiguring the Channels MEAS.C Can be used to set the desired number of pre-arm readings SENS1SWEOFFSPOIN Taking Readings After Using CONFigure CONF.C IOOUTPUTSADDR, FETC1? Querying Command Settings QUERY.C Enable Intr ERRORCHK.C Abort Digitizer Command Module Deadlock Where to go Next Programming Language Using the Digitizer INPUT.C Configuring the Digitizer Input ARMCNT.C Taking a Burst of Readings ARMLEVEL.C Level Arming ARMSOUR1 EXT Pre- and Post-Arm ReadingsPREPOST.C SAMPLE.C Specifying a Sample RateARMSOUR1 IMM Trigsour TIM DUALSAMP.C Dual Rate SamplingARMSLOP1 POS Senssweoffspoin Using Multiple Digitizers MULTAD.C FETC2? OUTPTTLT0STAT onOUTPTTLT0IMM PACKED.C Using the Packed Data Format Diagchanlab Form Pack For i = 0 i 20 i++ IOOUTPUTSADDR, SYSTERR? VMEREAL.C VME Bus Data Transfers Vinsconfvmefeed ’CONVCHAN1’ Trigstarsour VMEVinsconfvmemode GEN On Next Using the Digitizer Chapter VMESEG1.C Armstarcoun Armstarsour IMM On Next IOOUTPUTSADDR, *RST*CLS IOOUTPUTSADDR, SYSTERR? DOS VME Bus Data Transfers Using an Embedded Controller On Next Using the Digitizer Chapter On Next On Next INST.H #include Files Inst INST.CPP On Next Chapter Using the Digitizer E1429.CPP E1429.H Local Bus Data Transfers Vinslbusmode GEN VinslbusresVinslbusfeed ’CONVBOTH’ Formdata Pack IOOUTPUTSADDR, Init IOOUTPUTSADDRMEM, Init Using the Digitizer Chapter Chapter Using the Digitizer On Next Vinslbusmode APP Vinslbusfeed ’MEMCHAN1’ IOOUTPUTSADDRG, *OPC? IOOUTPUTSADDRA, InitIOOUTPUTSADDRG, Init On Next Using the Digitizer Chapter On Next Vinslbusfeed ’CONVCHAN1’ Armstarsour TTLT0 Vinslbusmode INS OUTPTTLT0FEED ’READY’ IOOUTPUTSADDRG, Init IOOUTPUTSADDRG, *OPC?,5 IOOUTPUTSADDRI, Init Using the Digitizer Chapter Chapter Using the Digitizer Using the Digitizer Chapter STATUS.C Using the Digitizer Status Registers Using the Digitizer Chapter Understanding the Digitizer HP E1429 Digitizer Block Diagram Understanding the HP E1429 Digitizer Chapter Message and Register Interfaces Digitizer Command Paths Digitizer Input Section Scpi Command Control SENSechan VOLTage Range range Inverting and Non-inverting Differential Input Ports Setting the Input ImpedanceEnabling the 10 MHz Input Filter Digitizer Attenuators Setting the Signal Range Sensvoltrang Using the Single-Ended Input 1V Range Arming and Triggering HP E1429 Digitizer State Diagram ARM-TRIG State Diagram HP E1429 Digitizer Arming and Triggering ARM STARtSEQuence1 Set positive or negative transition Arm Window Boundaries Arm Level Range ARM Synchronization Signals OUTPutEXTernal1FEED source Enabling the Synchronization Signal Routing the Signal to a Source Offset Triggering Digitizer TRIGgerSTARtTIMer1 period Chapter Understanding the HP E1429 Digitizer Specifying the External Reference Frequency Digitizer Reference ClockSource TRIGgerSTARtCOUNt count SENSechan SWEepPOINts count Trigger Synchronization Signals OUTPutEXTernal1FEED source Routing the Signal to a Source Data Flow, Storage, and Conversions Analog-to-Digital Converter HP E1429 Digitizer Data Flow HP E1429 Digitizer Reading Storage 10. Memory Segments with Pre and Post-arm Readings MEMory Subsystem Digitizer Data Formats Determining the Battery Charge Definite Length Arbitrary Block Header Packed Reading Conversions HP Basic Example Removing the Arbitrary Block Header Language Example 16-bit readings Readings READ? 11. Retrieving Readings from Digitizer Memory Retrieving Readings Using FETCh? Retrieving Readings UsingREAD? FETChing Readings from Memory Separating Pre- and Post-Arm Readings Determining Number of Readings FETChed Using DIAGnosticUPLoad SADDress? Locating Unsegmented Readings DIAGnostic SubsystemMemory Management Maximum Readings Locating Segmented ReadingsARMSTARtCOUNt Ending segment address = segmentnumber * 65536 Therefore, the DIAGnosticFETCh? command would be executed as Locating the Data Register 12. Digitizer Registers in A16 and A24 Address Space Base Address Execute the following HP E1406 Command Module command On Next Data Register Offset DATA? VINStrument SubsystemVME Setting the VME bus Data Source Segmented Reading Transfers Understanding the HP E1429 Digitizer Chapter Multiple VME Bus Data Transfers Local Bus Description 14. Local Bus Signal Line Definitions 15. HP E1429B Local Bus Data Transfer Protocol How Data is Transferred Understanding the HP E1429 Digitizer Chapter Local Bus Transfer Configurations Digitizer Local Bus CommandsLbus Send EOF EOB D1 D1 D1 Multiple Digitizers and Serial TransfersEOF EOB D3 D3 D3 Digitizer Configuration Restrictions Setting the Local Bus Transfer Mode Setting the Local Bus Data Source Multiple Local Bus Data Transfers Status System Registers Status Subsystem CommandsDigitizer Status Registers 16. HP E1429 Status Groups and Associated Registers Reading the Condition Register Questionable Signal Status GroupCondition Register Operation Status Group Enable Register STATusOPERationCONDition? Standard Event Status Register Standard Event Status GroupPON CME EXE DDE QYE Reading the Standard Event Status Register Standard Event Status Enable RegisterESR? ESE? Oper RQS ESB MAV Ques Status Byte Status GroupStatus Byte Register Service Request Enable Register Presetting the Enable Register and Transition FilterReading the Status Byte Register STB? Spoll OPC OPC? WAI Saving Digitizer ConfigurationsSynchronizing the Digitizer RST How to Save and Recall a Configuration Understanding the HP E1429 Digitizer Chapter Command Reference Common Command Format Command Types Abbreviated Commands Scpi Command FormatARM Armlevneg Parameter Types Explanations, Examples Scpi Command ParametersImplied Optional Keywords Variable Command Syntax OUTPECLT0FEED ’EXT’ OUTPECLT0FEED \EXT\ Querying Parameter Settings Scpi Command ExecutionOptional Parameters Definite length block Armcoun Trigcoun MAX Executable When Initiated CommandsMIN and MAX Parameters in Coupled Commands Linking Multiple Scpi Commands Scpi Command ReferenceLinking Ieee 488.2 Common Commands ABORt ∙ Executable when initiated Yes ∙ Coupled Command NoABORt Example Aborting a measurement ARM STARtCOUNt ARMSTARtCOUNtSyntax Subsystem Parameters Parameter Range Default Name Type Values ARMSTARtCOUNt STARtDELay ARMSTARtDELayParameter Range Default Name Type Values MINimumMAXimum ARMSTARtIMMediate Example Setting the arming delaySTARtIMMediate ∙ *RST Condition none STARtLEVelchanNEGative voltage ARMSTARtLEVelchanNEGative voltageExample Arming for measurement Comments ∙ Executable while initiated No STARtLEVelchanPOSitive voltage ARMSTARtLEVelchanPOSitive voltage STARtSLOPen ARMSTARtSLOPen Example Setting the arm slope ARMSTARtSOURcen Example Setting two arm start sources ∙ Related Commands ARMSTARtSLOPen , ARMSTARtLEVelchan COUNt? CALibrationchanSubsystem Syntax Numeric None Data CALibrationchanDATA Assign @X to 70905FORMAT OFF Comments ∙ Executable when initiated No ∙ Coupled Command No DELay CALibrationchanDELay Gain CALibrationchanGAIN Seconds Confarrvolt 100,4.8,DEF,@1 ∙ *RST Condition none Example Performing a gain calibration CALibrationchanSECureCODE CALibrationchanSECureSTATe CALibrationchan SECureSTATe mode ,code enables or disables CALibrationchanSTORe CALibrationchanSTOReAUTO CALibrationchan STOReAUTO mode selects whether or notVALue Example Turn automatic storage of calibration values off Numeric 101.80 to Volts ∙ Related commands CALibrationGAINCALibrationchanVALue Zero Example Setting the calibration valueCALibrationchanZERO CAL1ZERO DEF,DEF,ALL ARRayVOLTageDC CONFigurechanCONFigurechanARRayVOLTageDC size,expected CONFigurechanARRayVOLTageDC Range Volts Value Maximum Voltage Resolution CONFARRayVOLT 20,1.5,@3 CALibrationchan CONVerge? DIAGnostic CHANnelchan LABel DIAGnosticCALibrationchan GAINSENSitivity?CALibrationchan ZEROSENSitivity? Example 1 Tagging the data with channel number DIAGnosticFETCh?∙ Coupled Command No ∙ Related Commands ABORt, FETCh? Example 2 Reading back PACKed data HP Basic program MEMorychanADDResses? DIAGnosticMEMorychanFILLDIAGnosticMEMorychan Fill numsegments, count sets up Thru Ffffff None DIAGnosticPEEK?PEEK? Example Examining the setting of the traffic register DIAGnosticPOKEExample Changing the contents of the traffic register Poke SGET? DIAGnosticSGET?Sput TEST? FETChchan Command Reference FETChchan Subsystem FETChchan Subsystem Command Reference FETC1COUN? FETChchanCOUNt? ∙ *RST Condition none Example Recovering readings in memory FETChchanRECover? Subsystem FORMat FORMat FORMatDATA ∙ Related Commands READ?, FETCh?Example 1 Setting the data format to 64 bit reals IMMediate INITiate Example Placing the HP E1429A in the wait-for-arm state INITiateIMMediate Subsystem INPutport INPutport INPutportFILTerLPASsSTATe INPutportFILTerLPASsSTATe mode enables or disablesIMPedance Example Enabling the 10 MHz low-pass filter STATe Example Setting 75 Ω input impedanceINPutportSTATe Example Disabling input port MEASurechanARRayVOLTageDC size,expected MEASurechanARRayVOLTageDC? MEASurechanARRayVOLTageDC? Maximum Voltage Resolution MEAS1ARRayVOLT? 20,1.5,@3 Example Enable memory to be non-volatile BATTerySTATeMEMory ∙ *RST Condition not affected ∙ *RST Condition none Example Check the battery charge MEMoryBATTeryCHARge? ECLTrgnFEED OUTPut OUTPutECLTrgnSTATe Example Setting the ECLTrg0 sync pulse sourceECLTrgnSTATe ∙ *RST Condition OUTPutEXTernal1FEED Parameter Range Default Name Type Values UnitsEXTernal1FEED Boolean TRIGgerSTARtSEQuence1 ARMSTARtSEQuence1 None RFTRigger SENSe12ROSCillator OUTPutEXTernal1STATe Example Setting the sync pulse sourceEXTernal1STATe TTLTrgnFEED Numeric Through None OUTPutTTLTrgnFEEDARMSTARtSEQuence1 None Example Enabling sync pulse for READy on TTLTrg5 Example Enabling sync pulse output to TTLTRG0* and TTLTRG5 OUTPutTTLTrgnSTATe READchan READchan Subsystem Command Reference Command Reference READchan Subsystem SENSe SENSechanFUNCtion SENSechanFUNCtion Example Selecting the single ended input on channel SENSechanFUNCtion SENSechanFUNCtion EXTernalFREQuency SENSechanROSCillator SOURce SENSechanROSCillatorSOURce Example Setting the Reference Oscillator Source SENSechan SWEep Number Maximum Number Memory Segments SENSechan SWEepOFFSetPOINts countOFFSetPOINts count Example Setting 50 pre-arm readings on channel 1, input port MINimum selects 1 reading SENSechan SWEepPOINts count Example Setting 500 readings SENSechan VOLTageDCRANGe range selects the range for SENSechanVOLTageDCRANGe SENSechanVOLTageDC RANGe Range Measurement Resolution Allowable Setting Volts PortsComments ∙ Executable when initiated Yes Example Selecting the 102.35 Volt range on channel SENSechanVOLTageDC RESolution?RESolution? Operation Status Register STATus OPCINITiate Subsystem Syntax Questionable Signal Status RegisterSTATusOPCINITiate OPERationQUEStionableCONDition? OPERationQUEStionableENABleSTATusOPERationQUEStionableCONDition? STATusOPERationQUEStionableEVENt? Example Setting the Operation register enable maskOPERationQUEStionableEVENt? Through +32767 None Non-decimal Numeric OPERationQUEStionablePTRansition STATusOPERationQUEStionableNTRansition PRESet STATusPRESet Example Reading the error queue ERRor?SYSTem VERSion? TRIGger Command Reference TRIGger Subsystem TRIGger Subsystem Command Reference TRIGgerSTARtCOUNt Example Taking 20 readings 8 pre-arm and 12 post-arm STARtSOURce TRIGgerSTARtIMMediate Bushold TRIGgerSTARtSOURce STARtTIMer1 TRIGgerSTARtTIMer1Example Setting the start trigger source Reference period to TRIGgerSTARtTIMer1 Period Value Table STARtTIMer2∙ *RST Condition 5.0E-8 seconds Multiple Period TRIGgerSTARtTIMer2 ∙ *RST Condition 1.0E-7 seconds Local Bus transfers VINStrument Data voltagelist VME VXI data transfer Bus transfers VINStrument CONFigureLBUSFEED CONFigureLBUSMEMoryINITiate VINStrumentCONFigureLBUSMEMoryINITiate CONFigureLBUSMODE VINStrumentCONFigureLBUSMODE CONFigureLBUSRESet VINStrumentCONFigureLBUSRESetExample Setting the Local Bus operation mode APPendGENerate None INSertOFF PIPeline CONFigureLBUSSENDPOINts VINStrumentCONFigureLBUSSENDPOINts Boolean On OFF None VINStrumentCONFigureLBUSSENDPOINtsAUTOCONFigureLBUSSENDPOINtsAUTO VINStrumentCONFigureTESTDATA voltagelist configures VINStrumentCONFigureTESTDATACONFigureTESTDATA ∙ *RST Condition none Example Testing Local Bus operation VINStrumentCONFigureVMEFEED CONFigureVMEMEMoryINITiate VINStrumentCONFigureVMEMEMoryINITiate CONFigureVMEMODE VINStrumentCONFigureVMEMODE CONFigureVMESENDADDRessDATA? VINStrumentCONFigureVMESENDADDRessDATA?Example Setting the VXIbus data transfer bus operation mode GENerateOFF None HEWLETT-PACKARD Virtual INSTRUMENT,ANY ATOD,0,A.01.00 VINStrumentIDENtity? Category Command Title IEEE-488.2 Common Commands DMC ∙ Executable when initiated YesCLS Example Define macro to start measurement EMC and *EMC?ESE and *ESE? ESR? Example Enable all error eventsGMC? String LMC? IDN?Example Query macro definition HEWLETT-PACKARD,E1429,0,A.01.00 OPC LRN? PUD and *PUD? OPC?PMC Block Through 63 characters None Data String RCL RST RMC SRE and *SRE? SAV TRG STB? WAI TST? Command Quick Reference Chapter Chapter Command Quick Reference Unmask VINStrument Scpi Conformance Information Scpi Confirmed Commands Chapter Scpi Conformance Information Scpi Conformance Information Chapter Appendix Contents Specifications To VME Bus Read-OutTo Local Bus E1429B only Number of Partitions Total Readings per Partition Amplitude Characteristics Signal Conditioning Output Formats Signal-to-Noise RatioGain and Offset 4.3.1, note Filtering Single-ended inputs Connector BNC Converter Supplemental CharacteristicsWord Error Rate 4.15 qualified error level word error rate Integral Nonlinearity 4.4.3, Note Analog Bandwidth 4.6.1 filter off Single-ended inputs, supplemental characteristicsEffective bits on different ranges Crosstalk between channels Appendix a Specifications Effective bits, relative to 1V single-ended range Differential Inputs, supplemental characteristics Crosstalk Frequency Sample Rate Characteristics Internal TimerTrigger Sample Clock Subsystem Timebase and Trigger additional supplemental characteristics Bus Access and Connectors General Characteristics EMC Specifications Appendix a Useful Tables IDN.C HP BASIC, C ERRORCHK.CSLFTST.C RSTCLS.C LBUS2PST.C LOCALAD.CLBUSAUTO.C STATUS.C EMC Mode OFFCalstorauto CAL1VAL Sour DELSLOP1 POS Table B-3. HP E1429A/B Error Messages Code Description Appendix B Useful Tables Useful Tables Appendix B Appendix B Useful Tables Local bus test data size not Register Programming System Configuration Register reads and writes are 8-bits Reading and Writing to the Registers Figure C-1. HP E1429A/B A24 Address Space Addressing the Registers Determining the A24 Base Address Appendix C Register Programming A24READ.C Register Descriptions See A24 Register Table Base + A/D Status Register Input Configuration RegistersA/D Serial Register Base +0316 Base +0B16 A/D Parallel Strobe RegisterA/D Shift Register Bit Name Function Abort and Arm Immediate Register Arm and Trigger Configuration RegistersArm Status Register Base + Timebase Initiation Registerbase + Arm Source Register Arm Source Register Power-on/Reset SettingsArm Internal Bus Registerbase + Base + 4B16 Arm Control Register Power-on/Reset SettingsArm Control Register Base + 4D16 Trigger Source Register Power-on/Reset SettingsTrigger Source Register Register Programming Appendix C Base + 4F16 Reference Oscillator Register Power-on/Reset SettingsReference Oscillator Register Arm Count Latch Register Arm delay Register Base + 5116 and base +5316Arm Count Register Base + 5516 and base + Decade Division Register Trigger Immediate Registerbase + 5D16Binary Division Register Base +6116 Post-Arm Reading Count Register power-On/Reset Settings Pre-Arm Reading Count Register power-On/Reset SettingsPre-Arm Reading Count Registers Base + 7316 and base + Memory Control Registers Traffic Register Power-on/Reset SettingsTraffic Register Base +0216 Data Register Pulse RegisterChannel ID Register Base +2116 Memory Control Register Power-on/Reset SettingsMemory Control Register Base +2316 to base +2716 Memory Address Registers Base Address Registers Terminal Address RegisterBase +2B16 Base +2D16 and base +2F16 Figure C-2. Accessing the A/D Shift Register Using the A/D Shift Register Bit Name Setting Setting the Input Impedance Setting Measurement RangeProcedure Enabling the 10 MHz Filter Input Post 14 dB Attenuator Bits Bits 34 Bits 35 37,45 38,46 Checking the Idle State Setting the Arm Sources Setting the Digitizer Configuration Setting the Arm Delay Setting the Arm Count Setting the Reference Source Sending an Arm Immediate Signal Setting the Trigger Source Aborting Measurements Sending a Trigger Immediate Signal Initializing Digitizer Memory Re-initiating the Digitizer Appendix C Register Programming MSB LSB Initializing Initiating Timebase Processor Trigger count Timebase resetSample rate Data source Count is 1 and the post-arm count is y-3 Midsb LSB Register Programming Appendix C Initializing Digitizer Memory to Retrieve Data Retrieving Data from Memory Register Programming Appendix C MSB LSB Example Program Appendix C Register Programming REGPROG.C IOOUTPUTSADDR, READ? On Next On Next On Next On Next On Next On Next On Next On Next On Next On Next On Next Void checkerrorchar *function Char Into161 Length = Register Programming Appendix C Interleaved Transfers Local Bus Interleaved Transfers Local Bus Interleaved Transfers Appendix D Setting Interleaved Transfer Mode Procedure LBUSINTR.C Trigstarsour TIM Trigstarsour ECLT0Trigstartim 1E-6 OUTPECLT0FEED ’TRIG’ Tracdef SET1 Store readings 80 bytes in SET1 IOOUTPUTSADDRI, Abor IOOUTPUTSADDRMEM, *OPC?IOOUTPUTSADDRG, Abor Local Bus Interleaved Transfers Appendix D Appendix D Local Bus Interleaved Transfers Local Bus Interleaved Transfers Appendix D HP E1429A/B User’s Manual Index Index Index HP E1429A/B User’s Manual HP E1429A/B User’s Manual Index Index HP E1429A/B User’s Manual Scpi Index HP E1429A/B User’s Manual