Understanding the Digitizer | HP E1429A specs

Chapter 3

Understanding the Digitizer

Chapter Contents

This chapter contains the HP E1429 Digitizer description of operation. Where applicable, the chapter relates the digitizer’s SCPI commands to the digitizer hardware they control. The main sections of the chapter include:

∙ HP E1429A Digitizer Block Diagram . . . . . . . . . . . . . . . . . . 103

∙ The Message and Register Interfaces . . . . . . . . . . . . . . . . . . 105

∙ The Digitizer Input Section . . . . . . . . . . . . . . . . . . . . . . . . . . 106

∙ Arming and Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

∙ The Analog-to-Digital Converter . . . . . . . . . . . . . . . . . . . . . 129

∙ Data Flow, Storage, and Conversions . . . . . . . . . . . . . . . . . . 129

∙ Memory Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

∙ VME Bus Data Transfers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

∙ Local Bus Data Transfers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

∙ The Digitizer Status Registers . . . . . . . . . . . . . . . . . . . . . . . . 165

∙ Saving Digitizer Configurations . . . . . . . . . . . . . . . . . . . . . . 174

HP E1429 Digitizer Block Diagram

The HP E1429 Digitizer block diagram is shown in Figure 3-1. Channels 1 and 2 have their own input section and their own 12-bit,

20 MSample/second analog-to-digital (A/D) converter. The message interface, register interface, trigger/timebase section, and memory are common to both channels.

Chapter 3

Understanding the HP E1429 Digitizer 103

Image 103

HP E1429A manual Understanding the Digitizer, HP E1429 Digitizer Block Diagram

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 Preparation for Use Assigning the Digitizer to a CommanderDigitizer Logical Address HP E1429A/B Logical Address Switch Location Digitizer Bus Request Level Installing the DigitizerBus Request Level Guidelines Addressing the Digitizer over HP-IB Addressing the Digitizer using an Embedded Controller Introductory Programs Sending the *IDN? CommandHEWLETT-PACKARD,E1429A,0,A.02.00 TST? IOOUTPUTSADDR, *IDN? Repeat Output 70905SYSTERR? SLFTST.C IOOUTPUTSADDR, DIAGTEST? Resetting Clearing DigitizerIOOUTPUTSADDR, *TST? IOOUTPUTSADDR, SYSTERR? IOOUTPUTSADDR, *RST*CLS Subend Repeat Querying Digitizer ConfigurationLRN? Integer LRN.C Chapter Getting Started TRIGSTARTIM1 10E-6 Instrument and Programming Languages OUTPEXT1STAT Ontrigsour EXT1OUTPEXT1STAT OFF Language Programs ∙ Turbo C++ Command Line CompilingMicrosoft QuickC clhpib.lib ∙ Microsoft QuickC CLHPIB.LIB Compiling in the Integrated Environment Other subsystems Introduction to Programming Using the MEASure CONFigure Commands Port HP E1429A Programming Sequence Programming Sequence Configuring the Channels Using MEASureHow to Make Measurements 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 PREPOST.C Pre- and Post-Arm ReadingsARMSOUR1 EXT Trigsour TIM Specifying a Sample RateSAMPLE.C ARMSOUR1 IMM Senssweoffspoin Dual Rate SamplingDUALSAMP.C ARMSLOP1 POS Using Multiple Digitizers MULTAD.C OUTPTTLT0IMM OUTPTTLT0STAT onFETC2? PACKED.C Using the Packed Data Format Diagchanlab Form Pack For i = 0 i 20 i++ IOOUTPUTSADDR, SYSTERR? VMEREAL.C VME Bus Data Transfers Vinsconfvmemode GEN Trigstarsour VMEVinsconfvmefeed ’CONVCHAN1’ 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 Formdata Pack VinslbusresVinslbusmode GEN Vinslbusfeed ’CONVBOTH’ IOOUTPUTSADDR, Init IOOUTPUTSADDRMEM, Init Using the Digitizer Chapter Chapter Using the Digitizer On Next Vinslbusmode APP Vinslbusfeed ’MEMCHAN1’ IOOUTPUTSADDRG, Init IOOUTPUTSADDRA, InitIOOUTPUTSADDRG, *OPC? 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 Enabling the 10 MHz Input Filter Setting the Input ImpedanceInverting and Non-inverting Differential Input Ports 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 Source Digitizer Reference ClockSpecifying the External Reference Frequency 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 FETChing Readings from Memory Retrieving Readings UsingRetrieving Readings Using FETCh? READ? Separating Pre- and Post-Arm Readings Determining Number of Readings FETChed Using DIAGnosticUPLoad SADDress? Memory Management DIAGnostic SubsystemLocating Unsegmented Readings ARMSTARtCOUNt Locating Segmented ReadingsMaximum Readings 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 VME VINStrument SubsystemDATA? 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 Send Digitizer Local Bus CommandsLocal Bus Transfer Configurations Lbus EOF EOB D3 D3 D3 Multiple Digitizers and Serial TransfersEOF EOB D1 D1 D1 Digitizer Configuration Restrictions Setting the Local Bus Transfer Mode Setting the Local Bus Data Source Multiple Local Bus Data Transfers Digitizer Status Registers Status Subsystem CommandsStatus System Registers 16. HP E1429 Status Groups and Associated Registers Condition Register Questionable Signal Status GroupReading the Condition Register Operation Status Group Enable Register STATusOPERationCONDition? CME EXE DDE QYE Standard Event Status GroupStandard Event Status Register PON ESE? Standard Event Status Enable RegisterReading the Standard Event Status Register ESR? Status Byte Register Status Byte Status GroupOper RQS ESB MAV Ques STB? Spoll Presetting the Enable Register and Transition FilterService Request Enable Register Reading the Status Byte Register Synchronizing the Digitizer Saving Digitizer ConfigurationsOPC OPC? WAI RST How to Save and Recall a Configuration Understanding the HP E1429 Digitizer Chapter Command Reference Common Command Format Command Types Armlevneg Scpi Command FormatAbbreviated Commands ARM Implied Optional Keywords Variable Command Syntax Scpi Command ParametersParameter Types Explanations, Examples OUTPECLT0FEED ’EXT’ OUTPECLT0FEED \EXT\ Definite length block Scpi Command ExecutionQuerying Parameter Settings Optional Parameters MIN and MAX Parameters in Coupled Commands Executable When Initiated CommandsArmcoun Trigcoun MAX Linking Ieee 488.2 Common Commands Scpi Command ReferenceLinking Multiple Scpi Commands Example Aborting a measurement ∙ Executable when initiated Yes ∙ Coupled Command NoABORt ABORt ARM Subsystem ARMSTARtCOUNtSTARtCOUNt Syntax Parameters Parameter Range Default Name Type Values ARMSTARtCOUNt MINimumMAXimum ARMSTARtDELaySTARtDELay Parameter Range Default Name Type Values ∙ *RST Condition none Example Setting the arming delayARMSTARtIMMediate STARtIMMediate Comments ∙ Executable while initiated No ARMSTARtLEVelchanNEGative voltageSTARtLEVelchanNEGative voltage Example Arming for measurement STARtLEVelchanPOSitive voltage ARMSTARtLEVelchanPOSitive voltage STARtSLOPen ARMSTARtSLOPen Example Setting the arm slope ARMSTARtSOURcen Example Setting two arm start sources ∙ Related Commands ARMSTARtSLOPen , ARMSTARtLEVelchan Numeric None CALibrationchanCOUNt? Subsystem Syntax 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 Example Turn automatic storage of calibration values off CALibrationchan STOReAUTO mode selects whether or notCALibrationchanSTOReAUTO VALue CALibrationchanVALue ∙ Related commands CALibrationGAINNumeric 101.80 to Volts CALibrationchanZERO Example Setting the calibration valueZero CAL1ZERO DEF,DEF,ALL CONFigurechanARRayVOLTageDC size,expected CONFigurechanARRayVOLTageDC CONFigurechanARRayVOLTageDC Range Volts Value Maximum Voltage Resolution CONFARRayVOLT 20,1.5,@3 CALibrationchan CONVerge? DIAGnostic CALibrationchan ZEROSENSitivity? DIAGnosticCALibrationchan GAINSENSitivity?CHANnelchan LABel ∙ Coupled Command No ∙ Related Commands ABORt, FETCh? DIAGnosticFETCh?Example 1 Tagging the data with channel number Example 2 Reading back PACKed data HP Basic program DIAGnosticMEMorychan Fill numsegments, count sets up DIAGnosticMEMorychanFILLMEMorychanADDResses? PEEK? DIAGnosticPEEK?Thru Ffffff None Poke DIAGnosticPOKEExample Examining the setting of the traffic register Example Changing the contents of the traffic register TEST? DIAGnosticSGET?SGET? Sput FETChchan Command Reference FETChchan Subsystem FETChchan Subsystem Command Reference FETC1COUN? FETChchanCOUNt? ∙ *RST Condition none Example Recovering readings in memory FETChchanRECover? Subsystem FORMat FORMat Example 1 Setting the data format to 64 bit reals ∙ Related Commands READ?, FETCh?FORMatDATA IMMediate INITiate Example Placing the HP E1429A in the wait-for-arm state INITiateIMMediate Subsystem INPutport INPutport Example Enabling the 10 MHz low-pass filter INPutportFILTerLPASsSTATe mode enables or disablesINPutportFILTerLPASsSTATe IMPedance INPutportSTATe Example Setting 75 Ω input impedanceSTATe Example Disabling input port ARRayVOLTageDC? MEASurechanMEASurechanARRayVOLTageDC size,expected MEASurechanARRayVOLTageDC? Maximum Voltage Resolution MEAS1ARRayVOLT? 20,1.5,@3 ∙ *RST Condition not affected BATTerySTATeExample Enable memory to be non-volatile MEMory ∙ *RST Condition none Example Check the battery charge MEMoryBATTeryCHARge? ECLTrgnFEED OUTPut ∙ *RST Condition Example Setting the ECLTrg0 sync pulse sourceOUTPutECLTrgnSTATe ECLTrgnSTATe Boolean Parameter Range Default Name Type Values UnitsOUTPutEXTernal1FEED EXTernal1FEED TRIGgerSTARtSEQuence1 ARMSTARtSEQuence1 None RFTRigger SENSe12ROSCillator TTLTrgnFEED Example Setting the sync pulse sourceOUTPutEXTernal1STATe EXTernal1STATe Example Enabling sync pulse for READy on TTLTrg5 OUTPutTTLTrgnFEEDNumeric Through None ARMSTARtSEQuence1 None 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 OFFSetPOINts count SENSechan SWEepOFFSetPOINts countNumber Maximum Number Memory Segments Example Setting 50 pre-arm readings on channel 1, input port MINimum selects 1 reading SENSechan SWEepPOINts count Example Setting 500 readings RANGe SENSechanVOLTageDCSENSechan VOLTageDCRANGe range selects the range for Comments ∙ Executable when initiated Yes Range Measurement Resolution Allowable Setting Volts PortsSENSechanVOLTageDC RANGe RESolution? SENSechanVOLTageDC RESolution?Example Selecting the 102.35 Volt range on channel Operation Status Register STATus STATusOPCINITiate Subsystem Syntax Questionable Signal Status RegisterOPCINITiate STATusOPERationQUEStionableCONDition? OPERationQUEStionableENABleOPERationQUEStionableCONDition? Through +32767 None Non-decimal Numeric Example Setting the Operation register enable maskSTATusOPERationQUEStionableEVENt? OPERationQUEStionableEVENt? OPERationQUEStionablePTRansition STATusOPERationQUEStionableNTRansition PRESet STATusPRESet VERSion? ERRor?Example Reading the error queue SYSTem 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 Reference period to TRIGgerSTARtTIMer1STARtTIMer1 Example Setting the start trigger source TRIGgerSTARtTIMer1 Multiple Period STARtTIMer2Period Value Table ∙ *RST Condition 5.0E-8 seconds 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 APPendGENerate None INSertOFF PIPeline VINStrumentCONFigureLBUSRESetCONFigureLBUSRESet Example Setting the Local Bus operation mode CONFigureLBUSSENDPOINts VINStrumentCONFigureLBUSSENDPOINts CONFigureLBUSSENDPOINtsAUTO VINStrumentCONFigureLBUSSENDPOINtsAUTOBoolean On OFF None CONFigureTESTDATA VINStrumentCONFigureTESTDATAVINStrumentCONFigureTESTDATA voltagelist configures ∙ *RST Condition none Example Testing Local Bus operation VINStrumentCONFigureVMEFEED CONFigureVMEMEMoryINITiate VINStrumentCONFigureVMEMEMoryINITiate CONFigureVMEMODE VINStrumentCONFigureVMEMODE GENerateOFF None VINStrumentCONFigureVMESENDADDRessDATA?CONFigureVMESENDADDRessDATA? Example Setting the VXIbus data transfer bus operation mode HEWLETT-PACKARD Virtual INSTRUMENT,ANY ATOD,0,A.01.00 VINStrumentIDENtity? Category Command Title IEEE-488.2 Common Commands CLS ∙ Executable when initiated YesDMC ESE and *ESE? EMC and *EMC?Example Define macro to start measurement String Example Enable all error eventsESR? GMC? HEWLETT-PACKARD,E1429,0,A.01.00 IDN?LMC? Example Query macro definition OPC LRN? PMC OPC?PUD and *PUD? 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 Number of Partitions Read-OutTo VME Bus To Local Bus E1429B only Total Readings per Partition Amplitude Characteristics Signal Conditioning Filtering Signal-to-Noise RatioOutput Formats Gain and Offset 4.3.1, note Integral Nonlinearity 4.4.3, Note Converter Supplemental CharacteristicsSingle-ended inputs Connector BNC Word Error Rate 4.15 qualified error level word error rate Crosstalk between channels Single-ended inputs, supplemental characteristicsAnalog Bandwidth 4.6.1 filter off Effective bits on different ranges Appendix a Specifications Effective bits, relative to 1V single-ended range Differential Inputs, supplemental characteristics Trigger Sample Clock Subsystem Frequency Sample Rate Characteristics Internal TimerCrosstalk Timebase and Trigger additional supplemental characteristics Bus Access and Connectors General Characteristics EMC Specifications Appendix a Useful Tables RSTCLS.C ERRORCHK.CIDN.C HP BASIC, C SLFTST.C STATUS.C LOCALAD.CLBUS2PST.C LBUSAUTO.C CAL1VAL Mode OFFEMC Calstorauto POS DELSour SLOP1 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 + Base +0316 Input Configuration RegistersA/D Status Register A/D Serial Register A/D Shift Register A/D Parallel Strobe RegisterBase +0B16 Bit Name Function Base + Arm and Trigger Configuration RegistersAbort and Arm Immediate Register Arm Status Register Timebase Initiation Registerbase + Arm Internal Bus Registerbase + Arm Source Register Power-on/Reset SettingsArm Source Register Arm Control Register Arm Control Register Power-on/Reset SettingsBase + 4B16 Trigger Source Register Trigger Source Register Power-on/Reset SettingsBase + 4D16 Register Programming Appendix C Reference Oscillator Register Reference Oscillator Register Power-on/Reset SettingsBase + 4F16 Arm Count Register Base + 5516 and base + Arm delay Register Base + 5116 and base +5316Arm Count Latch Register Base +6116 Trigger Immediate Registerbase + 5D16Decade Division Register Binary Division Register Base + 7316 and base + Pre-Arm Reading Count Register power-On/Reset SettingsPost-Arm Reading Count Register power-On/Reset Settings Pre-Arm Reading Count Registers Base +0216 Traffic Register Power-on/Reset SettingsMemory Control Registers Traffic Register Channel ID Register Pulse RegisterData Register Memory Control Register Memory Control Register Power-on/Reset SettingsBase +2116 Base +2316 to base +2716 Memory Address Registers Base +2D16 and base +2F16 Terminal Address RegisterBase Address Registers Base +2B16 Figure C-2. Accessing the A/D Shift Register Using the A/D Shift Register Bit Name Setting Enabling the 10 MHz Filter Setting Measurement RangeSetting the Input Impedance Procedure 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 Data source Timebase resetTrigger count Sample rate 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 OUTPECLT0FEED ’TRIG’ Trigstarsour ECLT0Trigstarsour TIM Trigstartim 1E-6 Tracdef SET1 Store readings 80 bytes in SET1 IOOUTPUTSADDRG, Abor IOOUTPUTSADDRMEM, *OPC?IOOUTPUTSADDRI, 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