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HP Webcam D User's Manual

1. Timebsse ti Mode Fange Feal Time 3 Reference MEREZI Delay Sampling 19 9 Graph 1 58 Vediv 2 50 V 18 0 ys tdiv 950 00 w m Status Msiting for Trigger TRL ONLY Scale Real Time Reference Delay Sampling 18 0 Graph 1 50 Vediv _ 8 58 18 8 i NT Tmebase OUEST Status Mo Trigger Found TALE OWLY Pange Delay Sampling 9 1 3 58 y 10 0 us die 50 06 Figure 4 33 4 11 HP 54201A D Front Panel Exercises 4 23 SWEPT FREQUENCY RESPONSE Another typical measurement made with oscilloscopes is to measure the frequency response of a test circuit This measurement requires a signal generator with the capability of sweeping frequencies an HP 8116 with option 001 is used to describe the the measurement First set up the HP 8116A to sweep from 1 kHz to 500 kHz with a sine wave of amplitude 2 5 volts and offset of 1 25 volts This gives a 5 volt signal with 2 5 volts of offset into the 54201A D 1 megohm input Choose an internal sweep I SWP mode for the HP 8116A Set the start STA frequency at 1 kHz the stop STP frequency at 500 kHz the Sweep time SWT at 50 ms the high level HIL at 2 5 volts the low level LOL at 0 volts and select a sine wave Connect the signal output of the HP 8116A to the channel 1 input of the HP 54201A D
2. Pattern jl expression D i gt Ee DELete string string Y A STATe Subsystem Syntax Diagram ASSignment cont 8 99 HP 54201A D Programming STATE SUBSYSTEM STATe Subsystem Syntax Diagram SEQuence 8 100 HP 54201A D Programming STATE SUBSYSTEM lt s ANYstote NOTB NOTC NOTD Tote ANYstote NOTA NOTS ps NOTC NOTD B53420110 STATe Subsystem Syntax Diagram SEQuence cont 8 101 HP 54201A D Programming STATE SUBSYSTEM Assignment Commands ASSignment command query Command enables state assignment queries to be returned intact Query returns the current assignment settings Command Syntax ASSignment Example OUTPUT 707 ASSIGNMENT Query Syntax ASSignment Returned Format STATe crif 1 ASSignment cr1f MODE Xargument cr1f MULTiplex argument crlf normal mode only lt clock specification gt PODO NR2 cr1f POD NR2 crlf POD2 lt NR2 gt lt cr1f gt normal and qualified modes only lt label specification gt 1 8 maximum is 1 for bit fault modes Example DIM Assign 200 OUTPUT 707 ASSIGNMENT ENTER 707 USING K Assign PRINT USING K As
3. 2 Programming Aids Programming Examples Data Output Query Format to Controller Input Data Format From Controller 2222 29 Program Order Considerations Program Code Parameters General Program Command Format Rules System Commands Acquire Subsystem Channel Subsystem Display Subsystem Graph Subsystem essen Measure Subsystem State Subsystem Timebase Subsystem Trigger Subsystem Waveform Subsystem 5 eme Henne sehen nnne 8 129 Qo Co Co 000 INDEX vii viii blank HP 54201A D General Information SECTION 1 GENERAL INFORMATION 1 1 INTRODUCTION This manual contains information concerning the operation and programming of the HP 54201A and 54201D Digitizing Oscilloscopes When information concerns both models the system will be referred to as the HP 54201A D 1 2 MANUAL ORGANIZATION Section 1 General Information This section contains a description of this manual and the instrument Section 2 Getting Started This section explains how to prepare the HP 54201A D for use Section 3 Front Panel Controls and Menus This section familiarizes the user with the front panel controls and me
4. Commands CoUPling ECL TTL IMPedance LABel MODE OFFSet PROBe RANGe SCALe STORe Channel commands can be sent to either channel 1 or channel 2 and they are order dependent as follows Range limits are determined by the current probe attenuation factor The value limits for offset are determined by the current range selection So to completely specify channel settings program PROBe then RANGe and then OFFSet 8 51 HP 54201A D Programming CHANNEL SUBSYSTEM NO etu 22 960 LOW D poder c gt OFFSet gt offsetarg i el _ gt gt r SCALe 9 1 STORe D O count CHANnel Subsystem Syntax Diagram 25420105 HP 54201A D Programming CHANNEL SUBSYSTEM COUPIing command query Command selects the input coupling for the selected channel If AC coupling is selected and 500 impedance is in effect impedance will be changed to 1 M see IMPedance command Query responds with the selected coupling Command Syntax COUPling n 1 AC 2 Example OUTPUT 707 COUPLING DC Query Syntax COUPling Returned Format
5. FORMat BYTE gt i Omm lt tow i WAVeform Subsystem Syntax Diagram 8 131 54201A D Programming WAVEFORM SUBSYSTEM 8 132 m string Y POINts gt points arg T PREomb i preamble block a e DES xinscers CO G ROO NEUE UR I e YiNCrenent p yine erg I isis ora ier REF er ence yref org system commonds 85429105 WAVeform Subsystem Syntax Diagram cont HP 54201A D Programming WAVEFORM SUBSYSTEM SOURce command query Command sets the waveform source for the WAVeform commands that follow SOURce CHANnel 1 2 Sets channel 1 or channel 2 as the waveform addressed Channel waveforms or preambles cannot be written to directly from the HP IB They are modified with the corresponding CHANnel and data acquisition DiGitize RUN and RESUMe commands SOURce GRAPh 1 2 3 4 Sets the waveform displayed on graph 1 2 3 or 4 as the addressed waveform Only data on display is accessible with DATA query PREamble query returns points and x origin adjusted for current expansion Data can be written to graphs if the source is a memory otherwise read only S
6. 3 Label XXXXXXXXXX Waveform Memories 0 Protect Les 1 1 2 3 Labe XXXXXXXXXX Store Mode Normal E ies No Data 26 Figure 3 7 STATUS Menu Tree HP 54201A D Front Panel STATUS CONFIGURATION SUBMENU Figure 3 8 This submenu provides a display to view all of the channel time and lrigger setups The setups may be changed in this menu or may be changed by using the Channel Time or Trigger menu which are discussed later in this chapter In addition to the setup information covered by these menus the configuration submenu contains a setup label channel waveform math selection and channel labels guration Status centres Bree 08217 ONLY Setup Label acm Channel Timebase Input 1 t Sampling 8 508 kHz Range Mode Offset Range Probe I 1 1 1 Acquire Coupling Delay 1 Store Mode i Normal T Reference Auto Scale Rute Scale Label Trigger Refer to State Trigger Menus for Assignment and Sequence On Event Coupling C1 Figure 3 8 STATUS Configuration Submenu Setup Label Each instrument setup may be labeled for future reference This label is also shown in the STATUS Memory submenu if the setup has been saved Waveform Math The Channel field allows the user to display normal Channel 1 and Channel 2 waveforms Dual mode or to display wavefarm math capabilities of Channel 1 2 or Channel 1 2 These selections can on
7. 5 00 25 00 n Graph Chan 1 2 Figure 4 3 4 4 RISE TIME MEASUREMENT automatic measurements are continuously updated and made on the data shown on screen To make a rise time measurement there must be at least nine data points on the edge Make the rise time measurement by pressing SHIFT RISE 1 The 1 specifies that the measurement will be made on graph 1 Measurements may be specified for up to four different graphs The rise time of the waveform should be showing on the display in the upper left figure 4 4 4 5 FALL TIME MEASUREMENT To make a fall time measurement the falling edge must be displayed on screen This is done by specifying a negative slope for the trigger Select the trigger menu by pressing the TRIG menu key Move the blinking selection cursor to the selection field showing Slope Press the NEXT key to select SLOPE Notice the display is now showing the negative edge figure 4 5 Display the measurement results again by turning off the TRIG menu This is done by pressing the TRIG key again Each of the menu keys has a toggle function that switches between the measurement results if any and the desired menu The rise time should not have an answer since the rising edge is not shown on screen Make the fall time measurement by pressing SHIFT FALL 1 figure 4 6 Measurements slow the update rate slightly since c
8. 8 19 DEFINE 8 84 Defined measurements 3 5 8 87 suse Los eo x ate FPE EG CALibrate DELay Measure Calibration menu DELay Timebase CENTered DELETE key CHANnel is DELete Channel menu oe Digital detay Channel subsystem 8 51 ocak e ad ema ted Cleaning 2 2 CLEAR ENTRY key e 3 1 Display menu Clear lockout message Clear message 7 11 Display subsystem 7 10 DON T CARE CLOCK 8 103 DSP Code conversions es 7 2 DUTycycle COLUM oi ubere tet eme iur 8 63 Duty cycles Lesern HP 54201A D Index E ECL Channel ECL Trigger ECL key EDGE keys Envelope mode EQh M i ehe TR ERASe Sierra een Expanding graphs EXPAND key Extra d a aan Na e E FINE keys FORMat Display 8 64 FORMat Waveform 8 136 FREQUENCY 8 87 Frequency 3 5 4 4 Front panel 3 1 Front panel exercises 4 1 Fundamental measurements 8 91
9. V tcentered I Auto Scale 4 Enabled Disabiled 0n Event 0 59999 Coupling 2 Ma L fso Probe 1 1 to 100 1 Kae stete r Trigge Anatog 1 Mode State Only State Arms Analog efine Assignment State Mode Normal 1 I Qualified LI Missing Bit Extra Bit lultiplexing Normal Mode Only Clock Assignments Pod Thresholds Labels Polarity Bit Assignment Sequence Sequence Terms Restart Terms lumber Base Resource Terms Adjust and Centered not valid for External Trigger Source External trigger only HP 542010 orly TIMEBASE MENU TIMEbase Mode 4 Single xs Real Time 1 L nepetitive Detay xs Auto Scale Disabled H Period Pulse 1 1 1 Pulse 1 1 L Reference 1 Left 1 L Rignt 1 i center Figure 3 2 HP 54201A D Menu Tree 3 3 HP 54201A D Front Panel LOCAL Key B LOCAL is the shifted function of Ihe ECL key When LOCAL is selected the HP 54201A D returns to ihe local mode if being remotely controlled by a computer HARDCOPY Key O HARDCOPY is the shifted function of the TTL key When HARDCOPY is selected the entire screen display is output to a plotter or printer The HP IB address mode specified on the SYSTEM Peripherals menu must be set to T
10. _ 0 089 gt 1 ME 20306 Period Width Graph 1 89 5 00 us div 9 200 w Figure 4 16 Status Acquired Frame 00075 TALE QULY Period B 28 600 us Uhdth 14 302 pe dhdrh gt 14 298 us Graph 1 65 V div 2 50 V 1 EAM 77007007 5 08 9 200 v Figure 4 17 Status Acquired Frame 09148 TALI ONLY dhdth 14 38 vs Width 14 39 Tuty B 50 0 Graph 1 85 2 589 m 10 0 9 208 y Figure 4 18 4 7 HP 542014 0 Front Panel Exercises 4 16 WAVEFORM STORAGE Waveforms may be saved for later reference To save a waveform first press SAVE figure 4 19 change the storage selection from Setup to Graph then select 1 figure 4 20 next select memory 0 This saves the contents of graph 1 in memory 0 Similarly instrument setups may also be saved using the SAVE key There are four instrument setup memories and four wavetorm memories To recall the waveform one of two methods may be used The first method uses the NEXT PREV keys Move the blinking selection cursor to the Graph 1 label field Roll through the selections until memory 0 is showing figure 4 21 This displays the contents of memory 0 on graph 1 The second method uses the RECALL key in the same manner as the SAVE key was used Press RECALL then change Setup
11. Figure 4 11 HP 542014 0 Front Panel Exercises 4 10 Expanding Two Graphs to the Same Scale What if two related graphs are displayed and examination both graphs is desired in finer detail while maintaining the timing reiationship between the graphs This can be done by placing the X cursor on one of the graphs the O cursor on the other graph making X amp O active and pressing EXPAND This expands the time between X and Using the down arrow move the O cursor to the lower graph figure 4 12 Press X amp O then press EXPAND figure 4 13 then press EXPAND Both graphs should now be expanded to the same scale factor 4 11 CONNECT DOTS When waveforms are expanded the sample dots are spread apart and may not be easy to see clearly To allow the waveform to be viewed clearly the HP 54201A D has a connect the dots feature Press the DISPLAY menu key and change the Connect Dots field from off to on Notice that the sample dots are now connected by straight lines figure 4 14 Change Connect Dots to Off Press NORMAL to return to the unexpanded scale factor Then to remove the cursor values and return to the graph labels press VALUES while the SHIFT key is active 4 6 Acquired Frame 00989__ TALE ONLY Period 2 us iss Be seh LBP diy S49 VI use _ 0 000 1 Selected Statws Acquired Frame 01231 __ TALE ONLY Freq A gt H
12. ME LABel command query Command sets the user label for selected channel Query responds with the user label for selected channel Command Syntax LABel 10 character string Example OUTPUT 707 LABEL TEST 1 Query Syntax LABel 2 Returned Format LABel 10 characters quoted gt lt 1 gt Example OUTPUT 707 LABEL ENTER 707 Label PRINT Label 8 54 HP 54201A D Programming CHANNEL SUBSYSTEM _ command query Command selects input configuration for Channel 2 Dual channel SUBTract Ch1 Ch2 or ADD Chi Ch2 In NORMal mode channels acquire data present at the corresponding inputs INPUT 1 and INPUT 2 Channel 1 operates only in NORMal mode Channel 2 may be set to act as a differential input in which the signal present at INPUT 2 is either subtracted from or added to the signal at INPUT 1 The subtraction or addition occurs as a software function after the two input signals have been acquired therefore these modes don t provide the full benefit of common mode rejection as a true differential input system If either the SUBTract or ADD mode is selected for channel 2 all channel functions are slaved together except store mode and label When channel 1 is addressed setting probe factors range offset coupling or impedance controls these functions for both inputs When channel 2 is addressed probe coupling and impedance will b
13. Trigger Faund ____ TALK ANCY Define Trigger Mode Master Clock JEL State Mode ERR t TTL JL TTL 8 088 ag Pad Label Pn L Figure 5 11 State Assignment Menu for Digital Delay Example 2 Trigger ____ ______ Status Trigger Faund ___ TALK ONLY Define Trigger Mode In Sequence Qualify on Slave Clock then find Trigger then Count ccurrences of then Trigger Sequence Restart on Label ADDR Base s 2 Figure 5 12 Sequence Menu for Digital Delay Example 2 5 14 54201A D State Triggering 5 16 EXTRA BIT AND MISSING BIT MODES Oscilloscopes have traditionally only been able to trigger on the known This is fine when the waveforms under test are predictable However when troubleshooting unpredictable waveforms triggering at the proper time may be difficult or impossible to do with a conventional oscilloscope Two bit fault modes were implemented within the 27 bit parallel state triggering capability of the HP 54201D to enable the digitizing oscilloscope to trigger on the unknown or fault condition When the fault occurs the HP 54201D pre trigger acquisition and built in measurement capabilities allows you to perform a thorough cause and effect analysis of the failure Through the missing and extra bit triggering modes the HP 54201D can catch intermittent and mysterious hardware failures tha
14. o TRIGger irigger subsystem commands WAVe form waveform subsystem commands Ba ALPHa B FULL SELective i TRIGger COUNt PULSe seq CLOCk System Command Syntax Diagram HP 54201A D Programming SYSTEM COMMANDS A tbrete GAIN DELay 1 CHANne 5 string HeC gt DEBug System Command Syntax Diagram Cont 8 13 HP 54201A D Programming SYSTEM COMMANDS Y e ERRor HEADer MENU o PRINt READy Rov lt System Command Syntax Diagram HP 54201A D Programming SYSTEM COMMANDS 55 Cnn S gt REQuest srq enable code RESet F 2d REVIsion 900900 pone gt data block STATus Y TEST 05420106 996900 System Command Syntax Diagram Cont HP 54201A D Programming SYSTEM COMMANDS tinta ARGument command query Command sets output mode instrument response to a query for
15. 3 5 Memory MENU Menu keys Menu Tree Message codes Messages Meta messages Missing bit MODE Channel MODE Measure MODE State MODE Timebase is MODE Trigger MGS ERR EE CR DATI x eg MULTiplex N NORM key NORMal NOST sie wed Less a Tube NR1 NR2 NR3 format 8 10 Numeric argument Numeric entry keys Numeric formats cit eraat svi On Event Operating environment 2 2 OPTIONS eene Out of range arrows OVERSHOO 54201A D Index P Pass contro message PATtern Period PERiod Peripherals PLOT Plotter Pods Data probes Acquire POINts Waveform POLarily eese Positive pulse width Power cable Power requirements PREamble PREShoot PREV key re eR n I pc M TE PROBe Channel PROBe Trigger Probe attenuation Probes Program code parameters Program command format 7 9 Program order 7 8 8 8 Programming aids 8 7
16. Chani A8 IN ECL 2 Chan 21 DUT ECL 245 Figure 5 18 Extra Bit Glitch Detection HP 54201A D State Triggering 5 21 QUICK REFERENCE TO STATE TRIGGER MENUS The HP 542010 can trigger on a state condition or arm the analog trigger after a state condition Select the TRIG State submenu by pressing the TRIG menu key then move the blinking cursor to the Trigger field and press the NEXT or PREV key until a Trigger State menu appears This only chooses the state submenu and does not change the trigger from analog to state Two selections the Assignment menu and the Sequence menu are available in the State Trigger submenu and are selected from the Define field 5 22 State Trigger Assignment Menu The Assignment function figure 5 19 and 5 20 assigns information about the pod inputs and how they will be used TRIGGER MODE This selection determines whether the instrument will trigger on the conditions specified in the analog trigger submenu Analog Only or will trigger on the conditions set up in the state trigger submenu State Only or whether the state conditions will first be found and then used to arm the analog trigger State Arms Analog This Trigger Mode field is also present in the State Trigger Sequence menu STATE MODES Four state modes are available Normal Mode The The normal mode provides state triggering with up to four unique state patterns of up to 27 b
17. SEQuence SERial x 8 39 Serial number 8 39 Service request 7 11 SETup es 8 40 SHOW 8 67 Single mode 3 28 Single shot 4 11 SLAVe 8 104 SLOPE 8 128 SOURce Graph SOURce Measure 8 82 SOURce Trigger 8 124 SOURce Waveform 8 133 STATS Me EE HS 8 95 State subsystem 8 95 State trigger 3 21 5 1 State trigger menu 3 21 5 1 State trigger flowchart STATUS Status configuration menu Status measurement menu Status memory menu Status menu Status message Status Word STOP key STOPA qi iacu KU STORe Channel Store mode STRing Subsystem command Subsystem selector Swept frequency response Syntax diagrams System command System menu T Talk only Test amp Service menu TEXT ones TIMebase Timebase menu Timebase subsystem ev hee e da at a TRIGGER sy eritisi erneer Trigger coupling Trigger level Trigger menu analog 3 19 Trigger menu state s Trigger message Tri
18. 01 CHANnel 1 1 2 CHANnel 2 Example OUTPUT 707 SOURCE CHANNEL 1 Query Syntax SOURce 2 Returned Format SOURce CHANnel NR1 EXTernal cr1 f Example OUTPUT 707 SOURCE ENTER 707 Source PRINT Source CENTered command Command sets level to centered mode trigger level is at center of graph the same as channel offset if internal source is selected Not valid for external source Command Syntax CENTered Example OUTPUT 707 _ eaaa aA COUPIing command query Command selects the input coupling for trigger valid only for external and must be DC Internal trigger path coupling is set by the Channel 1 or Channel 2 source Command is included to allow trigger subsystem queries to be returned to the instrument Also refer to IMPedance command Query returns the selected trigger path coupling Command Syntax COUPling DC 1 Example OUTPUT 707 COUPLING DC Query Syntax COUPling 2 Returned Format COUPTing argument cr f Example OUTPUT 707 COUPLING ENTER 707 Coupling PRINT Coupling id 8 124 HP 54201A D Programming TRIGGER SUBSYSTEM ECL command Command presets the trigger for ECL as follows SOURce unchanged SLOPe POSitive LEVel 1 300 V Adjust PROBe unchanged SCALe DISabled COUPling DC IMPedance unchanged The SCALe autoscale function is disabled so that a selective autoscale may be performed thus preserving
19. COUPling lt argument gt lt cr f gt Example OUTPUT 707 COUPLING ENTER 707 Coupling PRINT Coupling i ECL command Command presets the selected channel for ECL as follows COUPling DC SCALe DISabled OFFSet 1 00 V PROBe unchanged RANGe 2 0V IMPedance unchanged The SCALe autoscale function is disabled so that a selective autoscale may be performed thus preserving the channel settings Command Syntax ECL Example OUTPUT 707 ECL TTL command Command presets the selected channel for TTL as follows COUPling DC SCALe DISabled OFFSet 2 50 V PROBe unchanged RANGe 6 0V IMPedance unchanged The SCALe autoscale function is disabled so that a selective autoscale may be performed thus preserving the channel settings Command Syntax Example OUTPUT 707 TTL 8 53 HP 54201A D Programming CHANNEL SUBSYSTEM M IMPedance command query Command sets the impedance for dc input coupling 500 or 1 Mo input coupling is always 1 Attempting to set LOW impedance for coupling will generate an error Query returns impedance of selected channel coupling Command Syntax IMPedance LOW 0 HIGH 1 Example OUTPUT 707 IMPEDANCE HIGH Query Syntax IMPedance 2 Returned Format IMPedance lt argument gt lt cr1 f gt Example OUTPUT 707 IMPEDANCE ENTER 707 PRINT Imped
20. Command Syntax 1 Example OUTPUT 707 NORMAL HP 54201A D Programming MEASURE SUBSYSTEM a MEASure command query The measure subsystem provides access to the front panel measurement functions and also provides some special functions particularly useful in systems applications The MEASure command selects the measure subsystem for the commands that follow The MEA amp ure query responds with the settings of the measure subsystem Command Syntax MEASure Example OUTPUT 707 MEASURE Query Syntax MEASure 7 Returned Format MEASure cr1f 1 SOURce lt source spec crif MODE argument cr f SENDvalid argument crlf DEFine DELay 0 lt meas spec gt lt cr1f gt DEFine NWIDth 1 lt meas gt lt 1 gt DEFine PWIDth 2 lt meas spec crlf DEFine ENVelope 3 lt meas spec crif Example DIM Measure 180 OUTPUT 707 MEASURE ENTER 707 USING K Measure PRINT USING K Measure HP 54201A D Programming MEASURE SUBSYSTEM MEASure Commands DEFine MODE SCRatch SENDvalid SOURce VALid RESULts DELay DUTycycle FALL FREQuency NWIDth OVERshoot PERiod PREShoot PWIDth RISE TMAX TMIN VAMP VAVE VBASe VMAX VMIN VPP VRMS VTOP PTIMe VTIMe PVOLt TVOLt TPOint VPOint CURSor Setting the Measurement Environment Getting Answers Displayed on screen Defined Measurements
21. Connect the start of sweep output rear panel of HP 8116A X OUT to the channel 2 input of the HP 54201A D Press the TTL preset key Select channel 2 as the trigger source Set Channel 1 and Channel 2 coupling to 1 dc Change the time range to 200 ms and adjust the time delay to get an entire sweep ramp of channel 2 on screen figure 4 34 Thus far the vertical and horizontal controls have been set up the same as for any signal Now set up the controls that are unique for measuring a frequency response Go to the DISPLAY menu and turn off the data filter Go to the CHAN menu and put channel 1 in the envelope mode The swept frequency response from 1 kHz to 500 kHz should be displayed Because this is not testing a circuit there are only two parallel lines figure 4 34 To look at a more interesting response connect a simple low pass filter using 1 resistor and 3300 pF capacitor This gives a roll off characteristic around 48 kHz figure 4 35 4 12 o 1 Peat Time 1 58 9976 2 Graph L Figure 4 34 Stotus TI 8 Figure 4 35 HP 54201A D State Triggering SECTION 5 STATE TRIGGERING WITH THE HP 54201D 5 1 INTRODUCTION State triggering in an oscilloscope is a new concept that with some familiarization and practice can become a very powerful tool Even though a pr
22. IMPedance lt argument gt lt cr1f gt lt NR1 gt lt crl f gt SCALe lt argument gt lt cr f gt Example DIM Trig 200 OUTPUT 707 TRIGGER ENTER 707 USING K Trig PRINT USING K Trig TRIGger Commands MODE SOURce CENTered COUPTing ECL TTL EVENt IMPedance LEVel PROBe SCALe SLOPe 8 121 HP 54201A D Programming TRIGGER SUBSYSTEM TRIGaer Lond 8 122 p MODE ANALoq CO L D EVENt gt count i LEVel if level_arg gt TRiGger Subsystem Syntax Diagram 54201A D Programming TRIGGER SUBSYSTEM Y A DISabled gt SLOPe POSItive NEGative TTL j system commands 85420192 TRiGger Subsystem Syntax Diagram Cont MODE command query Command sets the trigger mode Query returns the current trigger mode Command Syntax MODE ANALog 0 STATe 1 ARMed 2 J Example OUTPUT 707 MODE ANALOG Query Syntax MODE Returned Format MODE lt argument gt lt crlf gt Example OUTPUT 707 MODE ENTER 707 Mode PRINT Mode 8 123 HP 54201A D Programming TRIGGER SUBSYSTEM se SOURce command query Command sets the specified trigger source Query returns the selected trigger source Command Syntax SOURce EXTernal
23. MEMory lt memory gt 1 graph l 2 3 4 lt memory gt 0 1 2 3 Examples OUTPUT 707 SAVE GRAPH 1 2 is equivalent to OUTPUT 707 SAVE GRAPH 1 MEMORY 2 and OUTPUT 707 SAVE SETUP MEMORY 0 is equivalent to OUTPUT 707 SAVE SETUP 0 and OUTPUT 707 SAVE 0 SERial command query Command programs the serial number of the HP 54201A D Any string is accepted up to 10 characters If less than 10 characters it is padded with spaces to length 10 A checksum is made and the value is stored in non volatile RAM The rear panel cal switch must be set to the not protected position otherwise SERial is a query only command Query returns HP 54201A D serial number Command Syntax SERial lt string gt Example OUTPUT 707 SERIAL 2601A01219 Query Syntax SERial Returned Format SERial lt serial number code gt lt cr1f gt Example OUTPUT 707 SERIAL ENTER 707 Serial PRINT Serial 8 39 HP 54201A D Programming SYSTEM COMMANDS eS SETup command query Command sets up HP 54201A D according to learn string Query returns HP 54201A D learn string Block length is 978 bytes 982 including the and two byte count value Block format is discussed in Program Code Parameters paragraph at the front of this section This command allows instrument setups to be stored in the controller This data can then be sent back to the HP 54201A D when this controller stored setup is desired Query Syntax SETup
24. Programming TRIGGER SUBSYSTEM M SCALe command query Command sets autoscale mode for trigger Query returns current autoscale mode Command Syntax SCALe DISabled 10 ENABled 1 Example OUTPUT 707 SCALE ENABLED Query Syntax SCALe 2 Returned Format SCALe argument crlf Example OUTPUT 707 SCALE ENTER 707 Scale PRINT 5 1 SLOPe command query Command sets trigger slope Query returns the selected slope Command Syntax 510 POSitive 1 NEGative 0 Example OUTPUT 707 SLOPE NEGATIVE Query Syntax SLOPe 2 Returned Format SLOPe lt argument gt lt cr1f gt Example OUTPUT 707 SLOPE ENTER 707 Slope PRINT Slope 8 128 54201A D Programming WAVEFORM SUBSYSTEM WAVeform command query The waveform subsystem provides access to waveform data This includes active data from the channels as well as static data from the waveform memories For the active sources the following commands are QUERY ONLY with the exception of FORMat For memory waveforms addressed directly or via a graph values may be set or queried using DATA and PREamble or the individual preamble function commands Selecting a graph as the waveform source has the benefit that a portion of the whole waveform may be read if the graph is expanded that is with a graph you can window the waveform and just read the data of interest Th
25. 7112 L 76 01 001 100 114 4C CR 13 00 001 101 015 0D T13 M 77 01 001 101 115 4D 50 14 00 001 110 016 T14 N 78 01 001 110 116 4E SI 15 Q0 001 111 017 T15 79 01 001 111 117 4F Universal DLE 16 00 010 000 020 10 T16 80 01 010 000 120 50 Command LLO DC1 17 00 010 001 021 11 T17 Q 81 01 010 001 121 51 Group 18 00 010 010 022 12 18 R 82 01 010 010 122 52 UCG DC3 19 00 010 011 023 13 T19 5 83 01 010 011 123 53 DCL DC4 20 00 010 100 024 14 T20 T 84 01 010 100 124 54 PPU NAK 21 00 010 101 025 15 T21 U 85 01 010 101 125 55 SYN 22 00 010 110 026 16 T22 86 01 010 110 126 56 ETB 23 00 010 111 027 17 T23 w 87 01 010 111 127 57 SPE CAN 24 00 011 000 030 18 T24 X 88 01 011 000 130 58 SPD EM 25 00 011 001 031 19 T25 Y 89 01 011 001 131 59 SUB 26 00 011 010 032 1A T26 2 90 01 011 010 132 5A ESC 27 00 011 011 033 1B T27 9t 01 011 011 133 5 FS 8 00 011 100 034 1C T28 92 01 011 100 134 5 GS 29 00 011 101 035 10 T29 93 01 011 101 135 5D RS 30 00 011 110 036 1E T30 94 01 011 110 136 5E US 31 00 011 111 037 UNT 95 01 011 111 137 5F rd o jI Listen 10 SP 32 00 100 000 040 20 Secondary SO 1 96 01 100 000 140 60 Address L1 33 00 100 001 041 21 Command 51 97 01 100 001 141 61 Group 12 34 00 100 010 042 22 Group 52 b 98 01 100 010 142 62 LAG L3 35 00 100 011 043 23 SCG 53 99 01 100 011 143 63 1 Note 3 14 36 00 100 100 044 24 4 d 100 01 100 100 144 64 5 37 00 100 101 045 25 55 e 101 01 100 10
26. Accumulate Mode The accumulate mode displays the present acquisition on screen along with all previous acquisitions The accumulate mode can be selected to erase automatically after 16 acquisitions fast after 64 acquisitions slow or manual erase To manually erase an individual graph press the ERASE key and enter the appropriate graph number in the Erase Graph field To manually erase acquisitions on all graphs at once press the RUN STOP key twice The accumulate mode is enabled for all graphs displayed and is for display purposes only Automatic measurements and cursors operate on the last acquisition only Reference lines must be off before the accumulate mode can be enabled Data Filter Three types of data fillers which extend resolution to 7 bits are available to the user depending on the time range and sampling mode selected Real time sampling 5 us to 10 s range Data is put through a 3 point moving average filter The filter may be toggled on or off The voltage at displayed data point n is defined as Vh titered 1 4 V54 1 2 V4 1 4 V Real time sampling 50 ns to 2 us range Data is put through a digital reconstruction filter The data filter is always on To look at the raw data go to the 5 us range turn off the data filter and expand the graph using ihe cursor EXPAND key Repetitive sampling all time ranges During repetitive sampling more than one sample may occur at a given data point o
27. G zziii rera m eee RERO GRAPH Graph display Graph subsystem GRATicule Qraticul amp tee Ir H Hardcopy 3 8 6 1 8 30 HARDCOPY key 3 4 vere E TU ED Ease 8 24 HELP 8 24 Holdoff by events 3 20 5 13 HP IB address mode 3 8 default conditions e 7 7 HP IB message e 7 3 EROR 7 1 I 8 24 IMPedance Channel 8 84 IMPedance Trigger 8 126 IMPedance Waveform 8 136 Input data 7 8 8 8 8 108 INSERT 3 1 Installation 2 1 INVerse J aa deco ERREUR 4 10 K KEY ied e RIT I ERA Keyboard Key codes Key down power up reset L LABel Channel LABel State LABel Waveform CEVI ziii traer eaten Geli iei OCCHI Learn string SETup EINE 255425 ora rv a ere Line voltage selection Listen only LOCAL key Local lockout Local message Local mode LONGform EOWler M MASTER m m MEASute Measure subsystem Measurements automatic
28. HP 54201A D Programming CHANNEL SUBSYSTEM i RANGe command query Command sets channel range Query responds with current range setting The allowable range settings with 2 digit resolution are based on the PROBe setting and are as follows for dual channel mode Range settings are doubled for CH1 CH2 and CH1 CH2 modes NORMAL MODE PROBE FACTOR VALID RANGE SETTING 1 1 40 mV to 16 V 2 1 80 mV to 32 V 5 1 200 mV to 80 V 10 1 400 mV to 160 V 20 1 800 mV to 320 V 50 1 2 Vto 800V 100 1 4 V to 1600 V Command Syntax RANGe lt NR3 gt Example OUTPUT 707 RANGE 5 5E0 Query Syntax RANGe 7 Returned Format RANGe NR3 cr1f Example OUTPUT 707 RANGE ENTER 707 Range PRINT Range SCALe command query Command sets autoscale mode for channel Query responds with current autoscale mode Command Query SCALe DISabled 0 ENABled 1 J Example OUTPUT 707 SCALE ENABLED Query Syntax SCALe 7 Returned Format SCALe argument crlf Example OUTPUT 707 SCALE ENTER 707 Scale PRINT Scale 8 57 HP 54201A D Programming CHANNEL SUBSYSTEM STORe command query Command sets the store mode If average mode is selected count determines both the terminal count and the number of averages sample weighting factor For the other store modes count determines the termina count that is the number of frames which must be acquired until the waveform is considered ready for analys
29. MEASURE SUBSYSTEM SENDvalid command query If command SENDvalid is ON an optional parameter is sent by the HP 54201A D with measurement RESULts queries that qualifies the result This parameter indicates why an invalid result occurred or that the measurement result is good data The optional validity parameter returned with the RESULts query is validity GOOD_DATA NO WAVEFORM SCALING THRESHOLD CLIPPED NOT FOUND C C9 1 1 1 1 1 D The SENDvalid query returns the current SENDvalid selection ON or OFF Command Syntax SENDvalid ON 1 OFF 01 Example OUTPUT 707 SENDVALID ON Query Syntax SENDvalid Returned Format SENDvalid lt argument gt lt crlf gt Example OUTPUT 707 SENDVALID ENTER 707 Send PRINT Send VALid query Query which returns the valid status for the currently addressed graph The VALid arguments are the same as defined by SENDvalid Query Syntax VALid Returned Format VALid GOOD DATA NO WAVEFORM SCALING THRESHOLD CLIPPED NOT FOUND oer Example OUTPUT 707 VALID ENTER 707 Valid PRINT Valid 8 83 HP 54201A D Programming MEASURE SUBSYSTEM DEFine command query Several of the instrument measurements can be customized to suit special requirements using the DEFine command These definitions can be set at anytime but only take effect when the MODE command has been set
30. OUTPUT 707 LOWER ENTER 707 Lower PRINT Lower HP 54201A D Programming GRAPH SUBSYSTEM WINDow query Query returns a pair of X Y coordinates describing the time and voltage limits of the graph display Effectively these are P1 and P2 coordinates as used in plotter or HP Series 200 Controller window commands Query Syntax WINDow Returned Format WINDow lt NR3 gt lt NR3 gt lt NR3 gt lt NR3 gt lt cr f gt where the first NR3 pair is the P1 time volts and the second NR3 pair is the P2 time volts Example DIM Window 50 P2 OUTPUT 707 WINDOW ENTER 707 Window PRINT Window P1 EXPand command The graph expand function uses time rather than cursor location as the expansion criteria The command sets the time at the starting point of the graph and at the stopping point of the graph The graph must contain valid data or an error is generated The start time must be greater than or equal to the time of the first point of the waveform The stop time must be less than or equal to the time of the last point Minimum time Stop Start must be 254 sample intervals i e the minimum number of points displayed must be 355 The WINDow command is useful to determine the min and max values for start and stop times respectively Command Syntax start time gt lt stop time Example OUTPUT 707 EXPAND 50E 9 125E 9 NORMal command Command sets graph to show entire waveform unexpanded
31. Required Frame HOT TALE OLY 10 0 uscciv 0 000 s Figure 4 9 4 8 EXPANDING GRAPHS 4 9 Expanding One Waveform Graphs are expanded horizontally by positioning the X and O cursors about the area to be enlarged then press EXPAND Expand about the rising edge of the waveshape by placing the X cursor one division to the left of the rising edge and place the O cursor one division to the right of the rising edge figure 4 10 then press EXPAND figure 4 11 The expansion is performed on the graph with the active cursor If both cursors are on the same graph as in this case it does not matter which cursor is active Notice the little arrow to the left of the graph advising that the graph is expanded horizontally Vertical arrows would indicate the waveform is off screen vertically Automatic measurements may be performed on expanded waveshapes remembering that the measurement will be made on the data shown on screen Press NORMAL to return the waveshape to its unexpanded scale factor HP 54201A D Front Panel Exercises Pequired Frame 736 Freq 34 96 Lite Period 26 60 ys Grsph BEND 1 67 Vidi 2 49 V LEG 5 900 is z Selects Figure 4 10 Status Acquires Frame 05730 TALE ONLY Hot Found Nat Found we Vedi _ 8 38 1 6 20 90
32. SECTION 7 REMOTE CONTROL 7 1 REMOTE OPERATION HEWLETT PACKARD INTERFACE BUS The HP 54201A D can be operated through the Hewlett Packard Interface Bus HP IB Menu functions except protect status on memories remote only functions and most front panel functions except the LINE switch and cursor control are programmable through the HP IB Bus compatibility programming and data format are described in the following paragraphs The notation used in this section to describe bus communications is defined at the end of this section in the Notation Conventions and Definitions paragraph In this manual the HP 54201A D program codes are listed in ASCII code Table 7 1 Commonly Used Code Conversions includes a listing of ASCII characters and some commonly used equivalent codes For more information about HP IB refer to IEEE Std 488 1978 or the identical ANSI Standard MC1 1 IEEE Standard Digital Interface for Programmable Instrumentation and IEEE Std 728 1982 IEEE Recommended Practice for Code and Format Conventions 7 2 HP IB COMPATIBILITY The HP 54201A D complete bus compatibility as defined in IEEE Std 488 1978 is presented in Table 7 2 The programming capability of the instrument is further described by the twelve HP IB meta messages in the left hand column of table 7 2 Foremost among these is the Data message Data messages contain the program codes that set the instrument mode of operation 7 3 HP IB STATUS DISPLA
33. and specify all 8 bits as 0 s Note If a don t care bit is inadvertently changed to a 1 or a 0 change it back by pressing the DON T CARE key shift CLEAR ENTRY Move the cursor to the ADDR column of the b resource term and specify the bits as 11001 Move the cursor to the DATA column of the b resource terms and specify all 8 bits as 1 s Move the cursor to the ADDR field of resource term c and specify the bits as 11001 but leave the DATA field of resource term c as don t cares Move the cursor to the ADDR column of resource term d and specify the bits as 11001 Move the cursor to the DATA column of resource term d and specify the bits as 10000000 The resource definitions should now appear as shown in figure 5 5 Trigger Status Mo Trigger Found Define Trigger Made TALK ONLY ccurraenc Trigger Teri state then Trigger Acquisition Sequence Restart on state DATA Figure 5 5 Sequence Menu Resource Definitions 5 7 542014 0 State Triggering 5 14 State Sequence Specification The Sequence Specification may consist of up to 4 Sequence terms with the last term occurring up 59999 times addition the last term may be an ORed or ANDed combination of up to 4 individual terms Sequence Restart may be specified and can consist of up to tour ORed terms Move the blinking cursor into the Sequence specification so that it is in the field labeled any state This is the tr
34. same as channel 1 Query responds with the data type of channel 1 and makes channel 2 the same type and count so that the response is consistent for all sources Command Syntax NORMal 1 AVErage 21 ENVelope 3 Example OUTPUT 707 ACQUIRE TYPE NORMAL Query Syntax TYPE Returned Format TYPE lt argument gt lt crlf gt Example OUTPUT 707 ENTER 707 Type PRINT Type 8 49 HP 54201A D Programming ACQUIRE SUBSYSTEM eS Notes 8 50 HP 54201A D Programming CHANNEL SUBSYSTEM CHANnel command query The channel subsystem controls all Y axis functions including selecting the type of data to be acquired Channel 1 and Channel 2 are independently programmable for all functions The CHANnel command selects channel 1 or channel 2 as the destination for the commands that follow The CHANnel query responds with all of the settings for the specified channel Command Syntax CHANnel 112 Example OUTPUT 707 CHANNEL 1 Query Syntax CHANnel 1 23 Returned Format CHANne1 NR1 crlf PROBe NR3 cr1f RANGe NR3 cr1 f gt OFFSet NR3 crlf COUP1ing argument cr f gt IMPedance argument cr1f2 LABel 10 chars quoted gt lt erl f gt STORe lt argument gt NR1 cr1f SCALe argument cr f MODE argument cr1f Example DIM Chan 150 QUTPUT 707 CHANNEL 1 ENTER 707 USING K Chan PRINT USING K Chan
35. windowed in a graph The histogram is computed by summing the number of occurrences of each quantization level in the waveform data The quantization level with the greatest number of occurrences in the top half of the waveform corresponds to the 100 level The quantization level with the greatest number of occurrences in the bottom half of the waveform corresponds to the 0 level if the computed 0 and 100 levels do not contain Significant number of occurrences at least 5 of the total number of data points windowed in the graph then the 0 level and 100 level default to the values of VMIN and VMAX percentage thresholds area calculated from the 0 and 100 levels 8 88 28 5 100 OVERSHOOT PRESHOOT ninm M5420101 4 VBASE 0 VMIN TMIN Waveform Definitions HP 542014 0 Programming MEASURE SUBSYSTEM Defined Measurements cont All defined measurements except DELay follow the syntax Command Query Syntax measurement name gt lt graph number gt If no graph is specified the graph specified with the MEASure SOURce command is measured If the command form is specified the measurement is added to the appropriate measurement list time or volt on the HP 54201A D display and the answers are returned to the controller using the RESULts query If more than 3 measurements are specified for either the time or volt list only the last 3 a
36. COUNt must be exactly 4 16 64 or 256 For envelope COUNt parameter can be 10 to 10 000 active sources are set the same Query returns the count factor as described above Channel 2 type and count are set the same as channel 1 so that the response is consistent for all sources Command Syntax COUNt NRI Example OUTPUT 707 COUNT 1 Query Syntax COUNt 7 Returned Format COUNt NRI crlf Example OUTPUT 707 COUNT ENTER 707 Count PRINT Count 8 47 HP 54201A D Programming ACQUIRE SUBSYSTEM FILTer command query Command sets the data filter mode which extends resolution to 7 bits Three types of data filters are available to the user depending on the time range and sampling mode selected Real time sampling 5 us to 10 s range Data is put through a 3 point moving average filter FiLTer may be ON or OFF The voltage at displayed data point n is defined as Vn titerea 1 4 V amp 4 1 2 V4 1 4 V544 Real time sampling 50 ns to 2 us range Data is put through a digital reconstruction filter FILTer is always on regardless of how the command is sent However FiLTer is programmed OFF in this mode and you switch to either of the other filter time ranges the filter will be off Repetitive sampling time ranges During repetitive sampling more than one sample may occur at a given data point on a graph during a single acquisition frame When FILTer is set ON these s
37. ORed condition for a sequence restart condition The sequence restart selection field appears when a resource term is inserted into the sequence 5 23 5 24 blank HP 54201A D Peripherals SECTION 6 PERIPHERALS 6 1 INTRODUCTION The HP 54201A D has the capability of making a hardcopy dump to various HP IB graphics printers and plotters without the use of a controller This section will show you how to use the HP 54201A D with a graphics printer or plotter 6 2 SETTING UP THE HP 54201A D When a controller is not connected to the HP 54201A D and you want to dump to a graphics printer or plotter press the front panel SYSTEM menu key If the Peripherals submenu is not displayed press the NEXT PREV key until the Peripherals submenu appears Figure 6 1 Move the blinking field cursor to the HP IB Address Mode field and press NEXT PREV key if Talk Only is not displayed to set address mode to Talk Only If a hardcopy dump is desired using a controller refer to the SYSTEM programming commands PLOT and PRINT in Section 8 System Specification Ll Status No Trigger Found TALK ONLY E Peripherals HP IB Address Mode Hardcopy Dewice is Must Be in LISTEN ONLY Rear Panel BNC ME Beeper is Firmware Revision 12547 Serial Number 2558880101 Figure 6 1 SYSTEM Peripherals Submenu 6 1 HP 54201A D Peripherals 6 3 GRAPHICS PRINTERS The HP 54201 0 will interface directly with g
38. On Setup labels blank Stored setups Unprotected Stored waveforms Cleared 3 31 HP 542014 0 Front Panel STATE SETTINGS Status No Trigger Found ___ TALK ONLY Label Pal Trigger State Assignment Menu after Key Down Power Up Reset Trigger ta No Trigger Found TALK ONL Define Trigger Made In Sequence find 80 Occurrences cf Trigger Teri any then Do No Sequence Restart on no state Label R Base gt Trigger State Sequence Menu after Key Down Power Up Reset 3 32 54201A D Front Panel Exercises SECTION 4 FRONT PANEL EXERCISES 4 1 INTRODUCTION This chapter will further familiarize the user with the front panel operation of the HP 54201A D Digitizing Oscilloscope by performing some actual measurements This exercise requires a HP 54201A D two BNC cables and a signal generator capable of providing a 35 kHz square sine wave of 5 volts amplitude and 2 5 volts offset and a trigger output The swept frequency measurement requires a generator with a sweep frequency output a 1 resistor and 3300 pF capacitor An HP Model 81164 option 001 provides all the required generator functions and has 500 output 4 2 SETUP Set up the generator to give a 35 kHz square wave with an amplitude of 5 volts and an offset of 2 5 volts Connect the signal output of the generator to the channel one input of the HP 54201A D Connect the trigger ou
39. Returned Format DEFine DELay 101 NWIDth 11 PWIDth 2 ENVelope 3 lt meas spec gt lt cr1f gt Example DIM Define 60 OUTPUT 707 DEFINE DELAY ENTER 707 Define PRINT Define SCRatch command Command clears the voltage and time measurement lists from the display Command Syntax SCRatch Example OUTPUT 707 SCRATCH 8 85 HP 542014 0 Programming MEASURE SUBSYSTEM ese EXECUTING MEASUREMENTS The two modes of execution of measurements in the HP 54201A D are immediate and queued immediate mode query form the measurement is performed as the command is parsed and the results are entered into the output buffer If the waveform being measured is currently being acquired the measurement is postponed until the waveform reaches its terminal count criteria as specified with the CHANnel STORe command or ACQuire COUNt command queued mode command form the measurement is added to the display list on screen The queued measurements are performed as a part of the normal acquisition cycle and results are displayed on screen The resuits may be read over HP IB by using the RESULts query If the instrument is in RUN mode System command the measurements are updated each time a new frame is acquired If the instrument is in DIGitize mode System command the measurements are updated when the digitized operation is fully completed In addition to the defined measurement functions o
40. The left side of line 1 shows which menu if any is being displayed The right side of line 1 shows instrument status messages such as No Trigger Found or Acquired Frame Warning messages and error messages are also displayed on this portion of line 1 and are accompanied by an audible beep when initially displayed The right side of tine 2 indicates HP IB status and indicates when the SHIFT function is active These three lines display the menu selections for DISPLAY TRIG Analog CHAN and TIME menus when active or display the measurement answers when these menus are turned off Line 6 is always blank Display Status Acquired Frame 80888__ TALK ONLY Graticule Type Reference Lines I Number of Graphs W Accumulate Mode Connect Dats Off Data Filter Graph 1 76 Vediw 2 45 1880 nsvdiv 1 EENE Figure 3 23 Graph Mode Display 3 29 HP 54201A D Front Panel Line 7 Lines 8 23 This line displays the scale factors for the selected graph either 1 2 3 or 4 The scale factors displayed from left to right are Vertical sensitivity voits division Vertical offset volts Time sensitivity seconds division Time from the trigger event to the left side of the graph seconds The right portion of these lines display the acquired waveforms The DISPLAY menu allows 1 2 or 4 graphs to be displayed The portion of these lines to the left of the displayed graphs c
41. a label use the alphabetic characters provided when the shift key is active To obtain more labels move the blinking field cursor to the first label field then press INSERT To remove a label move the blinking field cursor to that label and press DELETE shift INSERT Pol This field selects logic polarity Selecting plus indicates positive logic voltages above the threshold are logic 1 and voltages below the threshold are logic 0 Selecting minus indicates negative logic voltages above the threshold are logic and voltages below the threshold logic 1 Pod Assignment This field assigns a particular state channel to a grouping defined by the label An asterisk means the channel is active A period means the channel is not part of that grouping State Trigger Sequence Menu Figure 3 18 The Sequence function sets up a sequence of state terms that determines the state trigger condition Trigger Mode This selection determines whether the instrument will trigger on the conditions specified in the analog trigger submenu Analog Only or will trigger on the conditions set up in the state trigger submenu State Only or whether the state conditions will first be found and then used to arm the analog trigger State Arms Analog This Trigger Mode field is also present in the State Trigger Assignment menu Resource Terms These are defined at the bottom of the state trigger sequence menu Label is a carryover from
42. as voltage values Command Syntax PODO POD POD2 I TTL ECL lt NR2 gt Example OUTPUT 707 PODO TTL Query Syntax PODO 001 POD2 2 Returned Format PODO POD POD2 lt NR2 gt lt cr1f gt Example OUTPUT 707 22 ENTER 707 Pod2 PRINT Pod2 eee LABel command query The label command addresses a particular label up to five characters long as the destination for the label commands that follow A valid label name cannot be all spaces If the label does not exist then a new label is added to the list unless the list is full If all labels had been previously deleted the dummy first label is replaced with the new label entered Label names are sensitive to leading spaces If the label name is less than 5 characters spaces are appended to pad to 5 characters Thus becomes and A is unique from When a new label is declared its polarity is defaulted to positive and all bits are allocated In normal and qualified modes up to 8 labels may be used In the bit fault modes only one label is permitted There is a unique label list held for each of the two cases Query returns the currently addressed label Command Syntax LABEL string Example OUTPUT 707 LABEL DATA Query Syntax LABel 2 Returned Format LABel string cr1f Example OUTPUT 707 LABEL ENTER 707 LabeT PRINT Label 8 106 HP 54201A D Programming STATE SUBSYSTEM
43. be 51 to 1001 Command Syntax POINts lt NR1 gt Example OUTPUT 707 POINTS 1001 Query Syntax POINts 7 Returned Format POINts lt NR1 gt lt cr1f gt Example OUTPUT 707 POINTS ENTER 707 Points PRINT Points 8 137 54201A D Programming WAVEFORM SUBSYSTEM M PREamble command query Command sets the preamble for the addressed waveform if it is a memory or a graph displaying a memory Al items must be sent in exactly the prescribed order delimited by commas Query returns the preamble block for the selected waveform In the examples given below the PREamble query is shown first to show how the preamble can be Stored in the controller The PREamble command is then given to show how to re enter the waveform preamble into a HP 54201A D memory Refer to the DATA command for more information Query Syntax PREamble Returned Format PREamb1e format parameter type parameter points NRI count NRI lt xincrement NR3 gt lt xorigin NR3 gt lt xreference NRI lt yincrement NR3 gt lt yorigin NR3 gt lt yreference 1 gt lt coupling parameter gt lt impedance parameter gt label 10 chars quoted crlf Example DIM Pre 150 OUTPUT 707 HEADER OFF OUTPUT 707 PREAMBLE ENTER 707 Pre PRINT Pre Command Syntax PREamble preamble block lt preamble block format type lt points gt
44. command Per IEEE 488 resets only the device interface functions L LE and C as defined 2 DCL or SDC HP IB bus commands Resets the parser state so that no subsystem is enabled e Clears device stalus word system STAtus command and KEY MSG and ERRor queues Clears all IEEE 488 input and output buffers DOES NOT affect any device variables handled by system RESet command in particular WAVeform FORMat LONGform HEADer ARGument RQS 3 RESet RST HP 54201A D system command Resets parser state so that no subsystem is enabled Clears device status word system STAtus command and KEY MSG and ERRor queues Basically the same as key down power up except no system tests are performed or corresponding failure default actions Changes these command variables WAVeform FORMat WORD EOI ON LONGform OFF HEADer OFF ARGument NUMeric RQS 32512 Ready bits all true except bit 15 status bits all false Sets GRAPh TRIGger and WAVeform SOURce parameters to CHANnel 1 Sets MEASure SOURce parameter to GRAPh1 Command Syntax RESet RST Example OUTPUT 707 RST When RESet system command has been executed the condition of the HP 54201A D is as follows 8 35 HP 54201A D Programming SYSTEM COMMANDS RESet RST cont CONDITION TIMEBASE Sweep mode Time range Reference Delay Autoscale Acquire mode CHANNELS Mode Range Offset Store mode Labels
45. commands that have both alpha and numerical arguments If set to alpha the arguments are returned in alpha format and follow the same abbreviation rules as commands f set to numeric the arguments are returned in numerical format NR1 This does not affect input data messages to the HP 54201A D arguments may be input in either alpha or numerical form regardless of how the ARGument command is set ARGument is set to NUMeric when the System RESet command is executed Query returns current argument mode Command Syntax ARGument ALPHa 1 NUMeric 0 p Example OUTPUT 707 ARGUMENT NUMERIC Query Syntax ARGument Returned Format ARGument argument cr lf Example OUTPUT 707 ARGUMENT ENTER 707 Argument PRINT Argument AUToscale command Command which performs autoscale per CHANnel TiMebase and TRiGger subsystem specifications if SELECTIVE is specified If FULL is specified or no argument is specified a full autoscale period and both inputs is performed Autoscale rearranges graph sources such that signals found 1 or chan2 are presented on the first graphs 1 and 2 if two inputs have signals Any sources not autoscaled or autascaled with no input signals are displayed on subsequent graphs The remaining graphs are turned off unless they contain memory waveforms Active sources are displayed in normal mode i e not expanded and will be displayed on no more than one graph after autoscale Command Syn
46. defined by IEEE Std 728 1982 A This format is binary block with the format lt gt lt A gt lt length word gt lt DAB DAB gt The length word is a 15 bit binary integer representing the number of DABs DABs are the data bytes themselves lt gt and A are ASCII bytes This format is ASCII representation of a binary number with the format lt gt lt Y gt lt DAB DAB gt All bytes are ASCH 0 This format is an ASCII representation of an octal number with the format lt gt lt O gt lt DAB DAB gt All bytes are ASCII H This format is an ASCII representation of a hexadecimal number with the format lt gt lt H gt lt DAB DAB gt All bytes are ASCII Numeric integer NR1 format decimal NR2 format or exponential value format The character lt E gt or lt e gt may be used to delimit the mantissa of exponential parameters Spaces are not allowed between the lt gt lt gt lt E gt lt gt or between digits Refer to figure 8 2 in Section 8 for syntax diagrams of NR1 NR2 and NR3 numeric representations Alpha Some commands require or allow alpha arguments such as ON or OFF These arguments are ASCII strings that start with an alpha character and are followed by printable character except a SP lt gt lt gt or DEL The general rules of program command format are The HP 54201A D sends and receives Data messages in standa
47. graph and certain measurement definitions may be customized to better suit your application Graph reference thresholds are set in the graph subsystem All measurements are based upon the time voltage windows defined by the four graphs measurements always reference graphs not channels or memories directly By expanding a graph you can select a region of the waveform data to measure 8 81 HP 54201A D Programming MEASURE SUBSYSTEM MODE command query Command sets the measurement mode definitions and thresholds User mode definitions are set by the MEASure DEFine command USER mode thresholds are set by the GRAPh subsystem UNITS UPPer and LOWer commands Query returns the current measurement mode Command Syntax MODE STANdard 0 USER 11 Example OUTPUT 707 MODE STANDARD Query Syntax MODE Returned Format MODE argument crlf Example OUTPUT 707 MODE ENTER 707 Mode PRINT SOURce command query Command selects the graph to be addressed for the measurements that follow This graph will be the default for measurement commands as well as the one used for the VALid query Query returns the currently addressed graph Command Syntax SOURce GRAPh 1 2 3 4 Example OUTPUT 707 SOURCE GRAPH 1 Query Syntax SOURce 2 Returned Format SOURce GRAPh lt NR1 gt lt cr1f gt Example OUTPUT 707 SOURCE ENTER 707 Source PRINT Source 8 82 HP 54201A D Programming
48. gt SCALe lt argument gt lt cr1f gt Example DIM Time 130 OUTPUT 707 TIMEBASE ENTER 707 USING K Time PRINT USING K Time TiMebase Commands MODE RANGe DELay REFerence SAMPle SCALe RATE Timebase commands are order dependent in that delay limits are determined by the current range setting 8 115 HP 54201A D Programming TIMEBASE SUBSYSTEM 8 116 delay_arg CO rance REALt ime X u REPetitive DISabled POS pu TiMebase Subsystem Syntax Diagram 5429191 HP 54201A D Programming TIMEBASE SUBSYSTEM MODE command query Command sets the timebase sweep mode Query returns the current sweep mode Command Syntax MODE AUTO 0 TRIGgered 11 SINGle 2 Example OUTPUT 707 Query Syntax MODE Returned Format MODE argument cr f Example OUTPUT 707 MODE ENTER 707 Mode PRINT RANGe command query Command sets timebase range s div 10 div Range is from 10 ns to 10 s in a 1 2 5 sequence If range is entered that is not in this sequence the number will be rounded up to the next larger range Real time sampling mode range is from 50 ns to 10s and repetitive sampling mode is from 10 ns to 20 us see SAMPle command Query returns the current range setting Command Syntax R
49. gt lt Voltage gt lt validity gt lt crl f gt lt Time gt and lt Voltage gt are number type NR3 lt validity gt GOOD_DATA 1 NOLWAVEFORM 0 SCALING 1 THRESHOLD 2 J CLIPPED 3 1 NOT FOUND 6 Example DIM Cursor 25 OUTPUT 707 CURSOR DELTA 2 ENTER 707 Delta PRINT Delta 8 94 HP 54201A D Programming STATE SUBSYSTEM STATe command query The state subsystem is available only on the HP 54201D and provides a means to program the state trigger function The two major groupings of the state trigger commands are assignment and sequence Assignment consists of defining the mode of state operation and specifying the probe thresholds labels and patterns Sequence is the actual specification of the events that are needed before a state trigger is generated The STATe command selects the state subsystem as the destination for the commands that follow The STATe query responds with all of the settings for the state subsystem Command Syntax STATe Example OUTPUT 707 STATE Query Syntax STATe Returned Format STATe lt crif gt 1 ASSignment lt crif gt MODE argument gt lt 1 f gt MULT iplex lt argument gt lt cr f gt normal mode only lt clock specification gt PODO NR2 crlf POD lt NR2 gt lt cr1f gt POD2 lt NR2 gt lt cr1f gt normal and qualified modes only lt label specification gt 1 8 maximum is 1 for bit
50. if in the examples of figures 5 13 and 5 14 the serial data was non return to zero i e one transition per reference cell then the serial data would be specified as both rising and falling edges 5 18 Faulty Serial Data Transmission Digital signal transmission is simply the transmission of a digital signal from one point to another The signal may be transmitted over a long transmission line or simply from the input to output of a logic gate buffer By defining the input signal as the reference and the output signal as the serial data the HP 54201D can easily detect and trigger on intermittent glitches or dropouts during signal transmission Two such examples are described in detail below 5 19 Data Transmission Dropout A microprocessor bus address line was intermittently dropping out at a point several gates away from its source Through the use of the bit fault triggering modes of the HP 54201D the faulty component was quickly discovered The intermittent part was an ECL to TTL translator To detect this failure the ECL input was defined as the reference celi input with the cell boundaries specified from rising to rising edge The TTL output was specified as the serial data with data transitions defined as each falling edge The state trigger setup time specification for the HP 54201D is 20 ns When functioning normally the output of the translator should follow the input with very little delay 20 ns therefore the rising edge of
51. improper site preparation or maintenance NO OTHER WARRANTY 15 EXPRESSED IMPLIED SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY ASSISTANCE Product maintenance agreements and other customer assistance agreements are available for Hewlett Packard products For any assistance contact your nearest Hewlett Packard Sales and Service Office Addresses are provided at the back of this manual SCWA984 HP 54201A D OPERATING AND PROGRAMMING MANUAL Your Comments Please Your comments assist us in improving the usefulness of our publications Please complete this questionnaire and return it to us Feel free to add any additional comments that you might have All comments and suggestions become the property of HP l Did you have any difficulty in understanding or applying the material in this manual None Minimal Difficulty Difficulty Quite Difficult a If so please identify the areas b What can we do to clarify these areas 2 Did the
52. indicates that this instrument requested service Error High indicates an error occurred An ERR query is used to determine error code Ready High indicates the instrument is ready This is based on the ready mask A RDY query is used to determine condition Local switch or power cycle High indicates that the instrument has been switched to local from the front panel power was cycled off then on again Front panel service request High indicates a front panel key has been pressed A KEY query is used to determine the key code Not used always 0 Request control Not used always 0 To set the RQS bit and SRQ bus control line true the condition must be enabled in the RQS mask If no condition is enabled the 54200A D can not set the SRQ bus control Tine nor the RQS bit true However bits 2 5 and 7 of the status byte are set to indicate which conditions have occurred 7 13 HP 54201A D Remote Control Table 7 4 The Upper Byte of the Status Word em The Ready Byte READY BIT CONDITION WEIGHT Not used always 0 High indicates that self calibration has compTeted execution High indicates that the requested self test has completed execution Hardcopy complete High indicates that the last byte of printer or plotter dump has been sent and received Data available High indicates that something is in the buffer waiting to be read Acquisition complete High indicates th
53. inputs can be used in a multiplex conf guration when triggering on microprocessor systems with multiplexed buses To connect these probes to the system under lest perform the following 1 Snap on the adapters for each of the general purpose probe pods 2 Connect the line for each probe bit to monitor a node in the system under test Leave extra lines unconnected Do not connect Signals with different threshold levels some TTL and some ECL for example in the same probe pod 3 Connect the ground probe from each pod to a ground point in the system under test 5 4 STATE TRIGGER ASSIGNMENT MENU The state trigger must monitor inputs from the digital system under test in exactly the same manner as the digital system interprets the outputs inputs Therefore the clock assignments and voltage thresholds utilized by the system must also be used by the HP 54201D state trigger The type of information is specified in the oscilloscope state trigger Assignment menu The Assignment menu is also used to group incoming channels and assign labels names to the groups Assigning labels to groups such as address data and status channels makes state triggering much easier for the user to interpret To display the default state trigger Assignment menu set the HP 54201D power to off then set the power to on while holding down any front panel key key down power on This presets the HP 54201D to a known setup Press the TRIG menu key This is the menu f
54. interface directly with a plotter that uses the Hewlett Packard Graphics Language HP GL and an HP IB interface Connect the plotter to the HP IB connector on the rear panel of the HP 54201A D using an HP IB interface cable Before the plotter is energized locate the configuration switch on the plotter and set the LISTEN ALWAYS or LISTEN ONLY switch to the True 1 position refer to the plotter manual it is important that this switch is set before the power is applied to the plotter because most plotters only read these switch settings when power is first turned on After the plotter has been connected to the 54201A D and the plotter configuration switch has been set to LISTEN ALWAYS press the HP 54201A D front panel SYSTEM menu key Display the Peripherals submenu and move the blinking field cursor to the Hardcopy Device Is field If Plotter is not displayed in this field press the NEXT PREV key to display Plotter The hardcopy function will dump exactly what is displayed on the HP 54201A D display Set up the display exactly as it is to be plotted then press the HARDCOPY shift TTL key to plot the display The status line of the display will read WAIT Hardcopy in Progress To abort the hardcopy press the CLEAR ENTRY key If the plotter is not connected or not working properly the status line of the display will report WARNING Transmission Aborted then will display No Hardcopy Device 54201A D Remote Control
55. just at the edge of the graphics horizontal arrow indicates that the graph is expanded An arrow to the left indicates that information to the left is not being displayed and an arrow to the right indicates that information to the right is not being displayed HP 54201A D Front Panel 3 13 KEY DOWN POWER UP RESET Holding any key down during power up will preset the HP 54201A D to a predetermined condition Key down power up reset is a very important feature to use to clear the instrument if the instrument experiences a lockup state and will not respond to any key press or programming command Hold the key down long enough for the power up tune to be completed The preset conditions are shown in the following table CONDITION SETTING TIMEBASE Sweep mode Auto Time range 10 us Reference Center Delay 0 05 Autoscale Period Acquire mode Real time CHANNELS Mode Dual Channel Range 50V 0 0 V Store mode Normal Labels blank Coupling 1 dc Probe attenuation 1 1 Autoscale Enabled TRIGGER Mode Analog Source Channel 1 Level 0 0 V Centered Slope Positive Label blank Autoscale Enabled On Event 00001 DISPLAY Graticule Frame of graphs 2 Graph sources 1 Channel 1 2 Channel 2 Connect dots Off Reference lines Off Accumulate mode Disabled Data filter on MEASUREMENTS Standard OTHER Running True HP IB address mode Not changed Hardcopy device Printer Rear BNC Constant low Beeper
56. key To recover your lost setup immediately press the RECALL key change Graph to Memory if required figure 4 24 and enter 9 in the Setup from Memory field Your lost setup will now be returned RECALL Setup 9 must be the first keystrokes made after the inadvertent entry or the setup will be lost 4 18 TROUBLESHOOTING LOGIC Troubleshooting a class of logic problems can be accomplished by quickly probing a number of different points and verifying whether a signal is there whether the logic high is a legitimate value and whether the logic low is legitimate value The HP 54201A D accomplishes this easily with TTL ECL presets and Vmax and Vmin measurements The input signal was previously chosen to simulate TTL levels Press the TTL preset key Next press SHIFT Vmax 1 then SHIFT Vmin 1 figure 4 25 Vmax shows the maximum value of the waveshape or the TTL high Vmin shows the minimum value of the waveshape or the TTL low Some care must be exercised to include the effect of overshoot Because these measurements are continuously updated probe from point to point while glancing at the display to verify the line is switching and also verify the high and low levels 54201A D Front Panel Exercises Status Acquired frame ALE OIL cabl fram Henory arsph 1 ee C 1 67 vods 2 53 008 Figure 4 24 MP 4 Weth 14
57. label names in LABEL fields or are used to enter numerical data in numeric fields When entering data in numeric fields the desired number is first keyed in followed by the appropriate units factor sec msec usec nsec Volt or mV When the CHS key is pressed when entering a label a minus sign will be inserted The CHS key may be used to toggle the sign positive or negative when entering voltage offset trigger level and delay time or can toggle the sign on and off after the numeric field has been entered RUN STOP RESUME Key O The RUN STOP key is a toggle function that will either start or stop acquisition depending on the previous condition When RUN 15 selected the acquisition starts from scratch and no previous data is displayed When the shifted function RESUME is selected acquisition resumes from the point when acquisition was terminated in the average envelope or accumulate modes If RESUME is selected when the instrument is actively acquiring data RUN selected acquisition will stop AUTOSCALE ECL and TTL Keys B These keys are used to scale the instrument controls AUTOSCALE selectively searches for and Scales the vertical trigger and timebase sections together or each section may be scaled independent of the others ECL and TTL keys are used to set Channel 1 Channel 2 and the trigger to range and offset values appropriate for probing ECL and TTL logic levels CHANNEL 1 CHANNEL 2 TRIGGER 2 0 V 1 0 V 2 0 V 1 3
58. listen and then switches it from remote to local mode The remote indicator REM in the status display will turn off when the Local message is received No instrument settings are changed by the remote to local transition Although the Local message returns front panel control it does not clear local lockout Unless the instrument receives the Clear Lockout Set Local message if local lockout is in effect it will return to local lockout mode the next time it goes to remote 7 26 RECEIVING THE LOCAL LOCKOUT MESSAGE The Local Lockout message LLO bus command disables the HP 54201A D front panel LOCAL key Local lockout is accepted when the instrument is in either remote or local mode Afterwards whenever the instrument is in remote mode lockout is in effect While the instrument is in local lockout the remote to local transition can only be made from the system controller by sending the Clear Lockout Set Local message or the Local message 7 27 RECEIVING THE CLEAR LOCKOUT SET LOCAL MESSAGE The Clear Lockout Set Local message REN control line false returns the Measurement System from remote to local mode and clears the local lockout condition No instrument settings are changed by this message 1t is accepted while the instrument is in either remote or local mode If the instrument is in remote mode the remote indicator REM in the HP IB status display is blanked when the Clear Lockout Set Local message is received 7 28
59. of the Clock For a set of single shot events this technique allows you to delay by events to a Specific event before triggering For repeated events it may be necessary to arm or qualify the start of the delay This is accomplished by specifying Operation in the Qualified state mode which is selected from the state trigger Assignment menu The following is a specific example showing how to use the Qualified mode to digitally delay the trigger When working with disc drives it is often necessary to monitor waveforms at any point on a track This can be accomplished by arming on the index pulse and then counting N number of clock cycles Perform a key down power up reset on the HP 54201D This will preset the HP 54201D to a specific default state Press the TRIG menu key then press the NEXT key to display the state trigger Assignment menu Assign the Trigger Mode as State Only and assign the State Mode as Qualified When in the Qualified mode multiplexing is automatically turned on Assign the Slave Clock to be the rising edge of K clock and connect the K clock probe of Pod 1 to the index pulse signal on the disc drive unit Assign the Master Clock to be the rising edge of of the clock and connect the J clock probe of Pod 0 to the system phase lock loop clock on the disc drive unit The Assignment menu should now appear as shown in figure 5 9 Trigger Status Mo Trigger Found TALK ONL Define ESET Trigger Slave Clack Mast
60. of the offset level of channel 1 or channel 2 trigger source When Adjust is selected the trigger level can be incremented or decremented by pressing the NEXT or PREV key The level can be changed in fine increments or decrements by pressing the FINE key shift NEXT or shift PREV The level may be also entered using the numeric key pad followed by the appropriate units factor key either Volt or mV The following table shows trigger sensitivity range of trigger level and resolution 3 19 HP 54201 A D Front Panel Trigger Parameters Trigger Source Channel 1 Channel 2 External Trigger Parameter Sensitivity 1 8 of full scale 60 mV dc to 250 MHz 502 dc coupled dc to 250 MHz 1 V dc to 100 MHz 2 coupled Range 0 75 times full scale Resolution 0 02 times full scale When External trigger source is selected the trigger level may be entered the same as Adjust mode for Channel 1 or Channel 1 trigger level Probe The probe attenuation factor is selectable from 1 1 to 100 1 when trigger source is external and coupling is 509 dc When external trigger coupling of 2 Ma dc is selected the probe attenuation factor is set to 10 1 This provides a 10 1 1 input at the HP 10017A or HP10018A probe tip The attenuation factor tracks the source when trigger source is channel 1 or channel 2 Auto Scale When the Auto Scale function is enabled and the front panel AUTO SCALE key is pressed the HP 54201A D searches fo
61. selections for all standard analog oscilloscope trigger parameters An example TRIG analog submenu is shown in figure 3 15 Trigger Status Acquired Frame BBBTB TALK ONLY Source Scale Level 2 5 Event Probe Coupling dc 1 1 Graph 1 2 53 V 5 06 usz div 1 Figure 3 15 Example TRIG Analog Submenu Source This field selects either channel 1 channel 2 or the external trigger input as the trigger Source The field adjacent to Source determines whether the HP 54201A D triggers on the positive slope or the negative slope of the trigger source Level The level field sets the voltage level at which the HP 54201A D triggers Level can be incremented or decremented by pressing the NEXT or PREV key Level can be changed in fine increments or decrements by pressing the FINE key shift NEXT or shift PREV A level may be also entered using the numeric key pad followed by the appropriate units factor key either Volt or mv When triggering on either Channel 1 or Channel 2 the trigger level is displayed as a dotted line on the graph whenever the trigger menu is displayed The trigger level may be selected as either Centered or Adjust When Centered is selected the trigger level is set to the same value as the offset level of channel 1 or channel 2 whichever was chosen as the trigger source When Adjust is selected the trigger level may be adjusted independent
62. status line of the display will advise Acquisition Complete Range Range sets the full scale time from the left side of the graph to the right side of the graph Range can be varied from 10 seconds to 50 nanoseconds in real time mode or from 20 microseconds to 10 nanoseconds in repetitive sampling mode The range can be varied in a 1 2 5 sequence by pressing the NEXT or PREV key The range can also be entered by using the numeric key pad followed by the appropriate units factor key sec msec or nsec If the value entered in not in the 1 2 5 sequence the HP 54201A D will round the entry to the nearest valid time Delay Delay allows the user to look at an acquisition window a specified amount of time before or after the trigger event The pre trigger range is shown in the table below The post trigger range is at least 200 screen diameters for all time ranges Sampling Mode Time Range Pre Trigger Range Real Time 50 ns to 5 us Up to 10 us 10 us to 10 s Up to 2 screen diameters Repetitive 10 ns to 20 us Up to 2 screen diameters and post trigger resolution are adjustable in steps of 0 1 coarse and 0 001 fine screen diameters or the least significant digit whichever is greater Additional delay may be added by using the On Event feature discussed in the analog trigger menu Auto Scale This selection changes the search criteria when the AUTO SCALE key on the front panel is pressed Timebase Auto Scale may be disa
63. submenus The last selected submenu is displayed when the menu key is pressed The field select cursor is restored to the same location as the last time the menu was accessed When power is applied to the HP 542014 0 the last menu to be displayed before power off is the first menu to be displayed at power on and the field select cursor is placed at the beginning of the first field The menu maps for the six menu keys are shown in the following figures 3 5 HP 54201A D Front Panel 3 6 SYSTEM Menu The SYSTEM menu allows the user to execute automatic calibration execute self test utilities and configure peripherals The SYSTEM menu has three Submenus Peripherals Calibration and Self Tests as shown in the SYSTEM menu tree in figure 3 3 SYSTEM Peripherals HP IB Address Mode Addressable 0 31 Lira Only 1 Hardcopy Device is p Printer Plotter Rear Panel BNC Constant Low Constant High Probe Compensation 2 kHz High on Trigger High on Frame Complete High on Acquisition Complete Pulse on State Sequence True High on State Sequence True Pulse on State Master Clock B is eeper is SES Calibration eA Cure o 0 15 1 thru 4 1 Gain amp Offset Chanl 2 Gain 4 Offset Chan2 3 Trigger Hysteresis 4 Trigger Level 5 Delay Chan1 6 Delay Chan2 7 Service Default Gain 8 Service Default Offset amp Trigger 9 Service Default Detay Test amp S
64. the HP 54201A D organized by subsystem Refer to the System Command portion of this section for detailed information on this aid In addition querying a subsystem such as CHANnel or specific functions is often a useful means to obtain an example of program syntax 8 8 PROGRAMMING EXAMPLES All programming examples used in this section are given in HP Series 200 Desktop Computer enhanced BASIC programming language For all examples the HP 54201A D interface select address code is set to 707 The following diagram shows how the commands are sent to the HP 54201A D Interface Command Select Code Header OUTPUT 7 07 AUTOSCALE FULL Controller HP 54201A D Command Output HP IB Address Argument Statement HP 54201A D Programming 8 9 DATA OUTPUT QUERY FORMAT TO CONTROLLER if a query command command followed by is sent to the HP 54201A D a response message is generated and sent back to the controller the next time the HP 54201A D is addressed to talk The command header will be returned if HEADer command has been set ON and will not be returned if set OFF The command argument will be returned as an alpha argument if ARGument command has been set to ALPha and will be returned as a numeric argument if set to NUMeric Headers and alpha arguments will be returned in the longform if LONGform command has been set ON and will be returned in the shortform if set OFF 8 10 INPUT DATA FORMAT FROM CONTROLLER Input Data mess
65. the assignment menu Base determines whether the channels grouped under label are expressed in hexadecimal binary octal or decimal format Four resource terms a b c and d may be defined by the user for use in sequence triggering 3 23 HP 54201A D Front Panel Trigger Status No Trigger Founi TALK ONLY Define Trigger Mode MENKTEVENUST In Sequence find Trigger Teri then then then Occurrences af then Trigger Acquisition Sequence Festart on Label ADDR DATA Base gt EW 11081 11001 Figure 3 18 Example State Trigger Sequence Menu Sequence Four user defined terms a b c and d the not equal of those terms any state or no state may be used in any combination to define a sequence of events on which to be triggered Initially only one term is shown To add more terms move the blinking field cursor to the occurrences field and press INSERT Up to three more terms may be added To remove a term move the blinking cursor to that term and press the DELETE key Last Sequence Term four resource terms and their not equal terms may be used in any ORed or ANDed configuration to specify the last sequence term To do this move the blinking field cursor to the last sequence term after occurrence specification and change any state to the desired resource term either b c d 0 4c 0 For more terms press INSERT while the blinking field cursor is on the resource ter
66. the trigger settings Command Syntax ECL Example OUTPUT 707 ECL eee SS LUC A cR TTL command Command presets the trigger for TTL as follows SOURce unchanged SLOPe POSitive LEVel 1 400 Adjust PROBe unchanged SCALe DlSabled COUPling DC IMPedance unchanged The SCALe autoscale function is disabled so that a selective autoscale may be performed thus preserving the trigger settings Command Syntax Example OUTPUT 707 TTL 8 125 HP 54201A D Programming TRIGGER SUBSYSTEM abbia dodi EVENt command query Command sets the instrument to trigger after a selected number of events Allows triggering after 1 to 59999 trigger events have occurred This command is useful when teamed up with state trigger in state arms analog mode to achieve a digital delay by events Query returns the current setting of events Command Syntax EVENt NRI Example OUTPUT 707 EVENT 1023 Query Syntax EVENt Returned Format EVENt NRI cr f Example OUTPUT 707 EVENT ENTER 707 Event PRINT Event IMPedance command query Command sets the impedance for external trigger dc input coupling 502 or 2 Mo If internal lrigger source programmed value is accepted if it matches channel impedance internal trigger path does not have a separate impedance control Query returns impedance of selected trigger source coupling Command Syntax IMPedance LOW O HIGH 1 Example OUTPU
67. the waveform between the X and the cursors The cursor NORMAL key returns the waveform to the original time scale factor When a waveform is expanded a small arrow is displayed at the outside of the upper left edge of the graph An arrow pointing to the left indicates that data to the left of the cursors of the unexpanded graph is not being displayed An arrow pointing to the right indicates data to the right is not displayed and an arrow pointing both directions indicates data to the left and to the right is not being displayed HP 54201A D Front Panel If the X and O cursors are on different graphs and X amp O is made active EXPAND will stretch both graphs to the same scale factor If the X and the O cursors are on different graphs and X is made active the section of the graph between the X cursor and the right hand side of the graph will be expanded If X and O are on different graphs and O is made active the section of the graph between the cursor and the left hand side of the graph will be expanded The EDGE key will jump the active cursor to next edge to the left of that cursor The EDGE key will jump the active cursor to the next edge to the right of that cursor The X cursor will jump to the data point nearest 10 the crossing of the lower threshold and edge of the waveform The cursor will jump to the data point nearest to the crossing of the upper threshold and edge of the waveform The thresholds are defined in the STATU
68. to Graph select 2 figure 4 22 and enter 0 for memory The contents of memory 0 is now displayed on both graphs 1 and 2 figure 4 23 Automatic measurements and cursors can be used on stored waveforms Press the RUN STOP key to start acquisitions again Graph 1 will now be Channel 1 again and Graph 2 will be Channel 2 UTI Status Required Fran Tr L to Merory 1 85 Wide 50 0 002 1 11 2 Figure 4 19 4 8 ral S stus Acquiced Frane P z4v TALE 0 Graph 1 10 0 009 Tinebase 180 us Peal Time 3 NAI 1 NITE Figure 4 21 Tinebase Status Acquired Frane DARIL Peer TAL SEENI fron hemor Graph l 55 vedi 10 9 ps diw 8 000 s 1 E t Requisition TALE ale MG Fi Tine 5 nce ff ing IB Graph 1 55 2 50 v 10 8 0 390 s 1 2 5 Figure 4 23 4 17 RECOVERING FROM LOST FRONT PANEL SETUP The HP 54201A D has a unique feature ta help you recover an unstored front panel setup Suppose you have the instrument front panel setup to a special configuration and inadvertently hit the TTL ECL or AUTO SCALE
69. to USER mode The DEFine query returns the current definition for the specified measurement Command Syntax DEFine DELay PWIDth NWIDth ENVelope measurement specification The PWIDth measurement is made from the first rising threshold defined by the measurement specification to the next falling threshold The NWIDth measurement is made from the first falling threshold defined by the measurement specification to the next rising threshold For both width measurements measurement specification MIDdle 0 UPPer 1 LOWer 2 Example OUTPUT 707 DEFINE PWIDTH MIDDLE For DELay both edges can be set independently For each edge polarity and threshold level is definable measurement specification lt polarity gt lt level gt lt polarity gt lt level gt polarity POSitive 0 NEGative 1 MIDdle 0 UPPer 1 LOWer 2 J lt level gt Example OUTPUT 707 DEFINE DELAY POSITIVE UPPER POSITIVE UPPER DEFine ENVelope allows the selection of the minimum waveform or the maximum waveform for fundamental measurement commands VTIMe VPOint TVOLt and PVOLt For ENVelope measurement specification MINimum 0 MAXimum 1 Example OUTPUT 707 DEFINE ENVELOPE MAXIMUM 8 B4 HP 54201A D Programming MEASURE SUBSYSTEM DEFine cont Query Syntax DEFine DELay PWIDth NWIDth ENVelope 1
70. when the REN bus control line goes false Pass Take Control The controller subset is not implemented Require Service Sets the SRQ line true when one of the service request conditions occur if it has been enabled to send the RQS message for that condition Status Byte Responds to a Serial Poll Enable SPE bus command by sending an 8 bit byte when it is addressed to talk Bit 6 RQS bit is true if the HP 54201A D has set the SRQ bus control line true The byte is cleared after it is read by the contorller if the RQS bit was set Yes Responds to a parallel poli Status Bit Is unaddressed to listen talk Commands Contro lines and Interface functions are defined in IEEE Std 488 1978 Knowledge of these might not be necessary if your controller manual described programming in terms of the twelve HP 1B Messages shown in the left column 2 The HP 54201A D Digitizing Oscilloscope complete bus capability as defined in IEEE Std 488 1978 is SHl T5 L3 LEO 581 RL1 061 DT1 CO El 7 4 HP 54201A D Remote Control 7 4 REMOTE MODE 7 5 Remote Capability The HP 54201A D communicates on the bus in both remote and local modes remote all front panel controls but the LINE switch and the LOCAL and SHIFT keys are disabled When Local Lockout is in effect the LOCAL
71. when SHIFT is on To move a cursor activate the desired cursor by pressing X O or X amp O Next press the desired left right up or down cursor arrow The left and right arrows move the cursors horizontally along the waveform The up and down arrows move the cursors from one graph to the graph above or below it The left side of the screen shows which cursor is active the voltage values of the X and O cursors the time from the trigger event to the X and O cursors and voltage and time values of the O cursor minus the X cursor AV and AT Make a manual period measurement by activating the X cursor then press 4 EDGE EDGE until X is on a positive edge of the waveform Next select the O cursor move it to the top graph using a vertical arrow then press EDGE or EDGE to put on the closest positive edge next to the X cursor figure 4 9 Cursor O X time gives the period measurement This method gives a slight error since the X cursor jumps to the lower threshold and the O cursor jumps to the upper threshold To correct for this error move either cursor to the corresponding place on the waveform as the other cursor 4 4 tus Required Frame 00180 Freq Period ir TALE ONLY 13 8 0 028 1 ij q Period B Graph BN m 10 8 us div 0 080 Cursor 05 Las v 0 00 Frag 3 Period
72. 0 for lower threshold 50 for middle threshold and 90 for upper threshold Pulse widths and delay are measured from the middle 50 Status ________ Status Mode Thresholds Required Frame 8286 TALK ONLY Graph 1 Graph 2 Graph 3 Graph 4 Up per 38 x gg 4 Middle SB 58 Lower 18 x 18 x Sn x 59 58 iB x 18 Definitions An Edge 7 12 MUST Cross Bath Upper and Lower Freq 1 Period Period al First Middle to Next Like Edge Width First Middle to Next Middle Rise AT First 11 First Duty Lower to Upper Upper to Lower Width Period 1 1 Width First 1 Middle to Next T Middle T 4 Tle lay V V max min rms Figure 3 9 First T Middle to First t Middle 1 BH X Using Histogram Absolute Maximum Voltage Absolute Minimum Voltage Root Mean Square Voltage Over 1 Period STATUS Measurement Standard Mode Submenu 3 13 HP 54201A D Front Panel User Defined Figure 3 10 Lower and upper thresholds may be defined for each individual graph in percentage voltage or preset vollages for TTL and ECL logic levels Middle thresholds are set to the average of Ihe upper and lower thresholds after the upper and lower thresholds have been set Lower percentage thresholds may be set from 1 to 45 percent and upper percentage thresholds may be set from 55 to 99 percent The thresholds for making pulse width and de
73. 0 Invalid Header 119 Command Header Expected 120 In Numeric Argument 121 Numeric Data Expected 123 Numeric Overflow 125 Invalid Representation 129 Missing Argument 130 In Non numeric Argument 131 Character Data Expected 132 String Data Expected 133 Block Data Expected 134 String Too Long 135 Block Length 136 Block Checksum 137 Invalid Argument 139 Missing Argument 142 Too Many Arguments 143 Missing Argument Delimiter 150 Query Expected 151 Query Not Permitted 200 Execution Not Possible 211 Settings Conflict 212 Number Out of Range 231 Input Buffer Overflow 233 Output Buffer Empty 300 Hardware Failure 302 System Fault 311 RAM Failure 312 RAM Data Loss 313 CAL Factor Loss 321 ROM Checksum 330 Power up Failed 8 23 542014 0 Programming SYSTEM COMMANDS E HEADer command query Command sets command header echo mode for query responses query responses will only return the command header when HEADer is set ON HEADer is set OFF by the RESet command Query form of this command returns the current echo mode Command Syntax HEADer ON 1 OFF 0 D Example OUTPUT 707 HEADER ON Query Syntax HEADer Returned Format HEADer argument cr f Example OUTPUT 707 HEADER ENTER 707 Header PRINT Header E HELP query Query which returns all commands in tabular form organized by subsystem The command i arguments are not outp
74. 0 MHz 200 megasamples second with infinite store time and waveform data output also provides parametric information about the analog characteristics of waveforms The HP 54201D has all the features of the HP 54201A with the addition of parallel and serial logic trigger qualification capabilities The HP 54201D includes 3 each containing 8 bit 1 parity bit clock organization The key features of the HP 54201A D Digitizing Oscilloscopes are 300 MHz repetitive bandwidth with 200 ps time interval accuracy 200 megasamples second sample rate 50 MHz single shot bandwidth using post capture data interpolation Capture two channels simultaneously Holdoff by events to trigger acquisition after a specified number of events Pre trigger viewing All front panel controllable parameters can be programmed via HP IB Continuously updated automatic waveform parameter measurements with user defined thresholds Waveform math Ch14Ch2 and Ch1 Ch2 Set up aids such as automatic waveform scaling ECL TTL preset levels and save recall of front panel setups One button hardcopy to HP IB printers and plotters Digital logic trigger qualification HP 54201D only 1 3 ACCESSORIES SUPPLIED The following accessories are supplied with the instruments HP 54201A D Two HP 10017A 10 1 divider probes One BNC to probe tip adapter One 2 3 meter 7 5 ft power cord One Operating and Programming Manual One Se
75. 1 145 65 L6 amp 38 00 100 110 046 26 S6 f 102 D1 100 110 146 66 L7 39 DO 100 111 047 27 57 9 103 01 100 111 147 67 18 40 DO 101 000 050 28 58 104 01 101 000 150 68 9 41 00 101 001 051 29 58 i 105 01 101 001 151 69 Lio 42 00 101 010 052 2A 10 106 01 101 010 152 Ltt 43 00 101 011 053 28 511 k 107 01 101 011 153 68 12 44 00 101 100 054 2C 12 108 01 101 100 154 6 L13 E 48 00 101 101 055 2D 813 109 01 101 101 155 60 14 46 00 101 110 056 E 14 n 110 01 101 110 156 15 47 00 101 111 057 2F 15 111 01 101 111 157 L16 0 48 00 110 000 060 30 16 p 112 01 110 000 160 70 L17 1 49 00 110 001 061 31 517 113 01 110 001 161 71 L18 2 50 00 110 010 062 32 518 r 114 01 110 010 162 72 Lig 3 51 00 110 011 063 33 19 s 115 01 110 011 163 73 120 4 52 00 110 100 064 34 520 t 116 01 110 100 164 74 121 5 53 00 110 101 065 35 521 u 117 01 110 101 165 75 22 6 54 00 110 110 066 36 522 118 01 110 110 166 76 123 7 55 00 110 111 067 37 S23 119 01 110 111 167 77 L24 8 56 00 111 000 070 38 524 x 120 01 111 000 170 78 125 9 57 00 111 001 071 39 525 121 01 111 001 171 79 L26 58 00 111 010 072 3A 526 2 122 01 111 010 172 127 59 00 111 011 073 38 527 123 01 111 011 173 7B L28 lt 60 00 111 100 074 3c 528 124 01 111 100 174 7C 199 61 00 111 101 075 3D 529 125 01 111 101 175 7D L30 gt 62 00 111 110 076 3E S30 126 01 111 110 176 111 111 077 DEL 127 01 111 111 177 HP 54201A D R
76. 112131415 6 7 8 9 c d e fJA B C D E F X 31117 0 1 2 3 4 5 6 7 8 9 X 91119 011121314151617 81 5 91119 0 1 X 311127 lt hexadecimal expression decimal expression il lt octal expression binary expression Note valid for query only An X specifies a don t care state while specifies an undefined state Dont cares in one value base cannot always be translated to another Example DIM State 500 OUTPUT 707 STATE ENTER 707 USING K State PRINT USING K State HP 54201A D Programming STATE SUBSYSTEM STATe Commands Assignment Commands ASSignment MODE MULTiplex CLOCK MASTer SLAVe DATA REFerence PODO POD1 POD2 LABel INSert DELete POLarity ALLocate BASE PATtern Sequence Commands SEQuence FIND COUNT OF TERMs RESTart 8 97 HP 54201A D Programming STATE SUBSYSTEM wc J nesetive Femme DISabled a E r 8 1 X DISobled J LeCREF or ence pu pe NEGot POSItlve BOTH DI1Sobled 0091 POSItive DISobled STATe Subsystem Syntax Diagram Assignment 8 98 HP 54201A D Programming STATE SUBSYSTEM Lage string ALLocate J erg
77. 16 bit word the request mask is used to specify both those conditions in the ready byte that set the ready bit in the status byte and those conditions in the status byte that generate a Require Service message The bits in the request mask have the same meanings as those in the instrument status word ready bit in the status byte is set when all of the conditions corresponding to bits in the ready mask are true at the same time This bit is actually set on the transition of the last condition to become true The REQuest programming command is used to specify the request mask while the STATus programming command can be used to read the instrument status word For more information refer to these two commands in Section 8 of this manual 7 32 SENDING THE STATUS BIT MESSAGE The HP 54201A D responds to a Parallel Poll Enable PPE bus command and send the Status Bit message 7 33 RECEIVING THE ABORT MESSAGE The Abort message IFC control line true halts all bus activity When the HP 54201A D receives the Abort message it becomes unaddressed and stops talking or listening The Require Service message and the Status Byte are unaffected by the Abort message HP 54201A D Remote Control Table 7 3 The Lower Byte of the Status Word The Status Byte STATUS BIT CONDITION High indicates that a message was displayed on the status line of the display MSG query is used to determine the message code Requesting service High
78. 38 us a 2 3 Duty 4318 9totus Requires Frame COSQ TRL 1 58 5 50 10 0 div 09 980 s 2 4 25 4 9 HP 542014 0 Front Panel Exercises 4 19 MEASURING WORST CASE JITTER Variations of signals can be measured using the envelope mode Since the parameters of channel 1 will be changed a stable trigger point will have to be established Go to the TRIG menu and change the trigger Source from channel 1 to channel 2 Adjust the trigger Level if necessary Change the signal Source to a sine wave Go to the CHAN menu and change the channel 1 Store Mode from Normal to Envelope figure 4 26 Change the signal generator offset from 2 5 volts to 1 5 volts in 100 mV increments Watch the channel 1 display as this is done The maximum and minimum excursions of the waveshape are shown figure 4 27 This is similar to making a voltage drift measurement Start the measurement over by pressing ERASE then enter 1 in Erase Graph field Now go to the DISPLAY menu and select Manual for the accumulation mode Change the signal generator offset from 1 5 volts to 2 5 volts in 100 mV increments Notice that the accumulation mode retains all waveshapes for display purposes figure 4 28 Manual accumulation erases the graph when the acquisition is restarted fast accumulation erases the graph after 16 acquisitions slow accum
79. 4201A D Programming GRAPH SUBSYSTEM GRAPh command query The graph subsystem allows the user to define the graph source and to define graph specific measurement criteria when measurement mode is user defined X axis windowing can also be done using the graph subsystem The GRAPh command selects the graph that is the destination for the graph commands that follow The GRAPh query responds with all of the settings for the specified graph Command Syntax GRAPh 1 2 3 4 Example OUTPUT 707 GRAPH 1 Query Syntax GRAPh 1 2 3 4 Returned Format GRAPh lt NR1 gt lt cr1f gt 1 SOURce lt source 5 gt lt 1 gt UNITs lt argument gt lt cr f gt UPPer lt NR1 gt lt NR2 gt lt NR3 gt lt cr1 gt LOWer lt NR1 gt lt NR2 gt lt NR3 gt lt crl f gt Example DIM Graph 70 OUTPUT 707 GRAPH 2 ENTER 707 USING K Graph PRINT USING K Graph GRAPh Commands SOURce UNITs UPPer LOWer MIDdle WINDow EXPand NORMal 8 71 HP 54201A D Programming GRAPH SUBSYSTEM 8 72 5060 or MEMor y ECL TTL upper arg 9 1 4 9 MIDd1 a LOWer lower_arg WINDow stort stop 4 85420193 GRAPh Subsystem Syntax Diagram HP 54201A D Programming GRAPH SUBSYSTEM SOU
80. 56 characters including semicolons commas SP CR and lt LF gt except those messages that include binary data blocks Binary data blocks must begin within the first 256 bytes of the data message Errors in Data messages syntax are trapped and can be reported via the HP IB For details about detecting and reporting format errors refer to the STAtus and ERRor programming commands in section 8 of this manual 7 17 Program Order Considerations Commands are interpreted and setups are changed in the HP 54201A D as they are received and found to be syntactically correct Commands preceding an error in messages are executed up to the point where the error is detected This provides consistent operation whether command are sent one per message or several per message 7 8 HP 54201A D Remote Control 7 18 Program Command Format Program commands consist of a header followed by parameter field Headers may be of a Long or Short abbreviated form This allows the programmer to use full words or abbreviations for program commands Command arguments can be words or numbers in most cases This allows one programmer to generate readable code and allows another programmer to generate code that is more efficient in the use of space in his computer Program Code Parameters may be of four types Strings Any collection of ASCII characters surrounded by quotation marks Blocks A block of data in formats as
81. 78 Threshold Limited 200 79 Enter Value and Units TEE 80 Signal Not Found 81 Trigger Changed 82 Acquisition Stopped 83 Acquisition Complete 84 No Trigger Found 85 Waiting for Trigger 87 SHIFT Selects Alphabet Note Frame number returned may not agree with count displayed when message was generated Standardized HP IB Warning Messages MSG NO MESSAGE STRING 122 Number Rounded 230 Transmission Aborted 8 28 HP 54201A D Programming SYSTEM COMMANDS command query Command that resets HP 54201A D parser to SYStem node If query HP 54201A D returns currently selected node system or subsystem Command Syntax NODE Example OUTPUT 707 NODE Query Syntax NODE Returned format NODE SYStem CHANnel TRIGger TIMebase DISPlay GRAPh ACQuire WAVeform MEASure STATe gt O O1 gt C9 P9 mee lt erlf gt Example OUTPUT 707 NODE ENTER 707 Node PRINT Node LT OPTions query Query which returns what options are installed in HP 54201A D There currently are no options Query Syntax OPTions Returned Format OPTions NONE 0 lt cr1f gt Example OUTPUT 707 OPTIONS ENTER 707 Option PRINT OPtion 8 29 HP S4201A D Programming SYSTEM COMMANDS iia PLOT command Command sets hardcopy device io plotter and does hardcopy dump of HP 54201A D display
82. ALLocate command query This command sets the allocation for the label that is it determines which pins are used on the pods or that label The lt NR1 gt values are interpreted as mask values much like the RQS mask Query returns the allocation of the addressed label Command Syntax ALLocate pod2 1 gt lt 91 NR1 podO 1 gt three pods in norma or qualified mode NRI only one pod in missing or extra bit mode Example OUTPUT 707 ALLOCATE 511 2 4 This allocation would be shown on the HP 54201D display as label E Fool Query Syntax ALLocate 2 Returned Format ALLocate pod2 NR1 gt lt pod1 1 gt lt NR1 gt 1 lt 41 NRI lt cr1 f gt Example OUTPUT 707 ALLOCATE ENTER 707 Allocate PRINT Allocate _ POLarity command query Command sets the polarity of the addressed label Query returns the polarity of the addressed label Command Syntax POLarity POSitive 1 NEGative 0 Example OUTPUT 707 POLARITY POSITIVE Query Syntax POLarity 2 Returned Format POLarity lt argument gt lt cr1f gt Example OUTPUT 707 POLARITY ENTER 707 Polarity PRINT Polarity 8 107 HP 54201A D Programming STATE SUBSYSTEM BASE command query Command Selects the base in which the pattern resource terms are displayed for the
83. ANGe lt NR3 gt Example OUTPUT 707 RANGE 50E 3 Query Syntax RANGe 2 Returned Format RANGe lt NR3 gt lt cr f gt Example OUTPUT 707 RANGE ENTER 707 Range PRINT Range 8 117 HP 54201A D Programming TIMEBASE SUBSYSTEM DELay command query Command sets time to current reference point from trigger Post trigger delay range is at least 200 Screen diameters horizontal time ranges Pre trigger delay range is defined as follows Pre Trigger Range Sampling Mode Time Range Pre Trigger Range Real Time 50 ns to 5 us Up to 10 us 10 us to 10 5 Up to 2 screen diameters Repetitive 10 ns to 20 us Up to 2 screen diameters Query returns current delay setting Command Syntax DELay lt NR3 gt Example OUTPUT 707 DELAY 50E 6 Query Syntax DELay Returned Format DELay lt NR3 gt lt cr1f gt Example OUTPUT 707 DELAY ENTER 707 Delay PRINT Delay REFerence command query Command sets the reference point for delay such that delay specifies the time of paint 1 LEFT point 501 CENTer or point 1001 RIGHT Query returns the current delay reference point Command Syntax REFerence LEFT 0 CENTer 1 1 RIGH 2 D Example OUTPUT 707 REFERENCE CENTER Query Syntax REFerence Returned Format REFerence lt argument gt lt cr1f gt Example OUTPUT 707 REFERENCE ENTER 707 Ref PRINT Ref 8 118 HP 54201A D Programming TIMEBASE SUBSYSTEM n cn SAMPIe comma
84. Coupling Probe attenuation Autoscale TRIGGER Mode Source Level Slope Label Autoscale On Event DISPLAY Graticule of graphs Graph sources 1 2 Connect dots Reference lines Accumulate mode Data filter MEASUREMENTS OTHER Running HP IB address mode Hardcopy device Rear BNC Beeper Setup labels Stored setups Stored waveforms 8 36 SETTING Auto 10 us Center 0 0 8 Period Real time Dual Channel 5 0 V 0 0 V Normal blank 1 14 Enabled Analog Channel 1 0 0 V Centered Positive blank Enabled 00001 Frame 2 Channel 1 Channel 2 Off Off Disabled On Standard True Not changed Printer Constant low On blank Unprotected Cleared HP 54201A D Programming SYSTEM COMMANDS RESet RST cont STATE SETTINGS Trigger ____________ Status No Trigger Found TALK ONLY Define Trigger B Analog Only Clock State Mode RIED Multiplexing UNIS 8 i 48 Label Pol Trigger State Assignment Menu after RESet Trigger tate ___________ Status No Trigger Found TALK ONLY Define N Trigger Mode W Analog Only Trigger nu then Nothing Sequence Restart on nu state Label gt Trigger State Sequence Menu after RESet 8 37 HP 54201A D Programming SYSTEM COMMANDS RESUMe command Command causin
85. D The DELETE key removes the same selection fields from the TRIGGER State menu on the HP 54201D only When automatic measurements are displayed the DELETE key removes the measurement highlighted by the blinking field cursor The CLEAR ENTRY key returns the selected field to the default power up condition It removes all characters from a selected LABEL field and removes automatic measurements the same as the DELETE key The DON T CARE key enters a space in a LABEL field or is used for entering logic levels in the TRIGGER STATE menu HP 54201D only 3 1 HP 54201 0 Front Panel COPY ERASE SAVE and RECALL Keys The COPY and ERASE keys operate only on the waveform graphs The COPY key copies the contents and scale factors of graph 1 2 3 or 4 to a second graph 1 2 3 or 4 The ERASE key removes all waveform information from the specified graph 1 2 3 or 4 The SAVE and RECALL keys operate on waveform graphs in memory or on instrument setups in memory SAVE stores a waveform graph or instrument setup to a specified memory 0 1 2 or 3 RECALL is used to recall a waveform previously stored in memory and display it on a specified graph or to return the instrument controls to a previously saved setting All instrument setup and waveform memories are non volatile when instrument power is removed Numeric Entry Units Keys 3 Numeric entry keys Q through 9 decimal point and CHS change sign are used when entering
86. DS System commands provide general utility functions useful in many subsystems or special functions which are simple to specify Note the hierarchical structure of the system and subsystem commands that was shown in Programming Command Tree Figure 8 1 SUBSYSTEM SELECTORS The nine subsystem selectors are commands which allow access to subsystem functions All have query form which provides a means to interrogate all settings in that subsystem Subsystem selectors are ACQuire 1 lt DISPlay GRAPh N MEASure STATe TIMebase TRIGger WAVeform These commands are detailed in the corresponding subsystem SYSTEM COMMANDS ARGument AUToscale BEEPer BNC CALibrate COPY DEBug DIGitize DSP EOI ERASe ERRor HEADer HELP ID KEY LONGform MENU MSG NODE OPTions PLOT PRINT READy RDY 11 REQuest 05 RESet RST RESUMe REVision RUN SAVE SERial SETup STAtus STOP TEST TST 54201 Programming SYSTEM COMMANDS acquire subsystem commands gt 1 channel subsystem commends D1sPlay display subsystem commands GRAPh graph subsystem commands 2 y SUBSYSTEM we measure subsystem commands SELECTORS v SIATe stote subsystem commands gt timebase subsystem commands
87. EENTTEM L1 Pod Z 1 Pod BL 88 B Label 1 1 Figure 5 19 Example State Trigger Assignment Menu Qualified Mode Trigger MES Status Trigger Found TALK ONLY Trigger Mode State Mode 1 Label Fol Figure 5 20 Example State Trigger Assignment Menu Missing bit Mode 5 21 54201A D State Triggering 5 23 State Trigger Sequence Menu The Sequence function figure 5 21 sets up sequence of state terms that determines the state trigger condition TRIGGER MODE This selection determines whether the instrument will trigger on the conditions specified in the analog trigger submenu Analog Only or will trigger on the conditions set up in the state trigger submenu State Only or whether the state conditions will first be found and then used to arm the analog trigger State Arms Analog This Trigger Mode field is also present in the State Trigger Assignment menu RESOURCE TERMS These are defined at the bottom of the state trigger sequence menu Label is a carryover from the assignment menu Base determines whether the channels grouped under label are expressed in hexadecimal binary octal or decimal format Four resource terms a b c and d may be defined by the user for use in sequence triggering SEQUENCE Four user defined terms a b c and d the not equal of those terms any state or no state m
88. FF The system command MENU 70 is equivalent to TEXT ON The SCReen command is particularly useful By turning SCReen OFF you can obtain significant improvements in instrument response times The DISPlay command selects display subsystem as the destination for the commands that follow The DISPlay query responds with the settings of the display subsystem Command Syntax DISPlay Example OUTPUT 707 DISPLAY Query Syntax DISPlay Returned Format DISPlay cr lf FORMat NR1 crlf GRATicule lt argument gt lt cr1f gt ROW lt NR1 gt lt cr1f gt COLumn lt NRI gt lt cr1f gt SCReen argument cr f TEXT argument cr f INVerse argument cr f REFerence lt argument gt lt cr1f gt ACCumulate argument crlf VALues argument crlf SHOW GRAPh NRi crlf CONnect argument crif Example DIM Display 160 OUTPUT 707 DISPLAY ENTER 707 USING K Display PRINT USING K Display 8 59 HP 542014 0 Programming DISPLAY SUBSYSTEM 2 i cule GRID 2 iere aA C DISPlay Subsystem Syntax Diagram 8 60 54201A D Programming DISPLAY SUBSYSTEM Y L RtFerene srRing string 85420196 DiSPlay Subsystem Sy
89. Front Panel Trigger Status Ho Trigger Found TALE CHL Define Trigger Mode Slave Clock Master Clock TK JKL State Mode x Figure 3 16 Example State Trigger Assignment Menu Qualified Mode Trigger Status No Trigger Found l l TALK ONLY Define Trigg r Mode MEM Reference Cell Serial Data L Clock State Mode MESET Label Pal Figure 3 17 Example State Trigger Assignment Menu Missing bit Mode 3 22 HP 54201A D Front Panel Clocks Three ORed clocks operate in a single phase or two phase demultiplexing mode Clock edges can be selected as positive negative or both positive and negative for each clock Different edge selections may be made on the same clock if it is used in each phase of the multiplexed mode The specified clock edge determines when the data on the state channels is clocked into the instrument for trigger comparisons Pod Thresholds The comparator thresholds for each of the pods may be set to a level suitable for TTL ECL or may be user defined in volts Multiplexing The clocks may be multiplexed in Normal mode for use with microprocessors that multiplex their data and address lines Labels Up to eight different five character labels may be designated in Normal and Qualified mode for any combination of input lines for ease in setting specifications Missing bit mode and Extra bit mode only allow one label To enter
90. HP 54201A D Index INDEX A Command format 8 9 Commands 8 3 Abbreviations Command cross reference 8 4 Abort message Command structure Accessories Command tree ACCumulate CONnect Accumulate mode 3 17 Connect dots ACQuire 8 45 Conventions Acquire subsystem 8 45 KGy Address mode 3 8 COPY RE Addressing 7 6 COUNT Acquire Adjust 3 19 COUNIt State ALLocate 8 107 COUNT Waveform Alpha argument 8 5 Coupling das ee Alpha character keys COUPIing Channel i ARGument COUPIling Trigger Arguments Waveform ASSignment CURSOR keys Automatic measurements CURSor Auto mode Cursors AUTO SCALE key AUTOSsCale Averaging nnn D B Dat filter iei ten 3 17 8 48 Data 8 8 BASE rco esse etes ers eR v hen e 8 108 Data message 7 7 7 10 Data output 8 8 DATA State B 105 DATA Waveform 8 135 DEBug
91. IB system controller If the instrument is set to talk only mode it does not respond to the SPE or SPD Serial Poll Disable commands and cannot send the Status Byte Bits in the status byte are set depending on the instrument state Ifa condition occurs that causes one of the bits in the status byte to be set and if its corresponding bit in the RQS mask is set the Require Service message will be sent If the RQS bit is set indicating that the instrument sent the Require Service message and a serial poll is executed all bits in the status byte will be cleared If the RQS bit is clear and a serial poll is executed the status byte will be left unchanged If a condition that caused one of the bits in the status byte to be set is removed and if the corresponding bit in the 805 mask is clear the corresponding bit in the status byte will be cleared To supplement the information in the Status Byte the ERRor KEY MSG and RDY queries can be used to determine what specific error occurred 7 31 THE STATUS WORD The instrument status word is a 16 bit integer containing information about the instrument conditions that set the ready bit in the status byte and or generate a Require Service message See Tables 7 3 and 7 4 for a description of the bits in the Status Word The upper 8 bits of the Status Word are known collectively as the ready byte while the lower 8 bits correspond to the status byte sent during a serial poll A companion
92. IND FOHMat FORMat FREQuency GRAPh GRATicule HEADer HELP ID IMPedance IMPedance IMPedance INSert INVerse Display subsystem Subsystem selector State subsystem System command State subsystem System command State subsystem System command System command System command Trigger subsystem Subsystem selector State subsystem Display subsystem Display subsystem System command State subsystem Acquire subsystem Waveform subsystem Channel subsystem Trigger subsystem Wavetorm subsystem Measure subsystem State subsystem Waveform subsystem System command Measure subsystem Measure subsystem Timebase subsystem State subsystem System command Subsystem selector System command Measure subsystem Channel subsystem Trigger subsystem System command System command System command Trigger subsystem Graph subsystem Measure subsystem Acquire subsystem State subsystem Display subsystem Waveform subsystem Measure subsystem Subsystem selector Display subsystem System command System command System command Channel subsystem Trigger subsystem Waveform subsystem State subsystem Display subsystem KEY LABel LABel LABel LEVel LINE LONGiorm LOWer MASTer MEASure MENU MODE MODE MODE MODE MODE MSG MULTiptex NODE NORMal NWIDth OF OFFSet OPTions OVERshoot PATtern PERIod PLOT PODO PODI POD POINts POINts POLarity PREamble PREShoot PROBe PROBe PTIMe
93. Instrument must be allowed to warm up for at least 30 minutes prior to executing front panel calibration To execute the calibration routines press the SYSTEM menu key then press the NEXT PREV key until the Calibration menu is displayed as shown in figure 3 5 Move the blinking cursor to the Execute Calibration field and enter the number of the routine you wish to execute Follow the instructions displayed on screen and watch the status line at the end of the calibration to see if the instrument calibrated successfully An audible beep will be heard when the selected calibration routine is complete When front panel calibration is complete set the rear panel CAL switch to the PROTECTED position 3 9 HP 54201A D Front Panel SYSTEM TEST amp SERVICE SUBMENU Figure 3 6 The self test section of this menu allows the user to verify that more than 90 of the HP 54201 A D circuitry is functioning properly Self test 0 checks out the microprocessor board and takes about five seconds to execute Self test 1 checks portions of the acquisition system and the state trigger HP 54201D only and executes in about ten seconds Self test 2 checks the rest of the acquisition system including the analog signal path and takes about 5 seconds per channel to execute To initiate any of the self tests move the blinking field cursor to the Execute Selftest field and enter the desired test number the numeric key pad Follow the directions displayed on
94. NEXT key to cycle through the remaining selections zb and zd until term a is displayed again Press the INSERT key once to display a second sequence term then press the NEXT key to display term b as the second term The oscilloscope is now specified to trigger whenever state pattern a or b occurs In our example the oscilloscope will trigger whenever all zeros or all ones are written to the DAC Move the blinking cursor to the Trigger Term field where or is displayed Press the NEXT or PREV key to display and The sequence terms now are an ANDed function of state patterns a and b For our DAC example the ANDed function of a and b can never occur Change the sequence terms to a and zb This is a valid condition for our example and is equivalent to saying trigger on any state other than a or b If anything other than all zeros or all ones is written to the DAC the oscilloscope will trigger Up to four ORed or ANDed terms may make up the sequence term by pressing the INSERT key while the cursor is on one of the sequence terms To delete ORed or ANDed terms move the cursor to the term to be deleted and press the DELETE key shift INSERT 5 8 54201A D State Triggering For our example change sequence term to be a only Move the blinking cursor to the Occurrences field The last sequence term in the list may be specified to occur up to 59999 times before generating a trigger To change the
95. NT The HP 54201A D will operate to all specifications within the temperature and humidity range given in table 1 2 of the 54201A D Service Manual However reliability is enhanced by operating the instrument within the following ranges Recommended Temperature 20 to 435 C 468 to 95 Recommended Humidity 20 to 80 non condensing High temperature humidity combinations should be avoided 2 6 CLEANING REQUIREMENTS When cleaning the HP 54201A D CAUTION must be exercised on which cleaning agents are used USE MILD SOAP AND WATER If a harsh soap or solvent is used the water base paint finish WILL BE damaged CAUTION BE CAREFUL when cleaning the keyboard Water can damage the keyboard circuitry if it seeps under the keys 2 2 HP 542014 0 Front Panel POWER CORD VOLTAGE CONNECTOR SELECTOR REAR PANEL BNC HP IB CONNECTOR CALIBRATION SWITCH Figure 3 1 Front and Rear Panel Controls 3 0 HP 54201A D Front Panel SECTION 3 FRONT PANEL CONTROLS AND MENUS 3 1 INTRODUCTION This chapter will help familiarize the user with the front panel operation of the HP 54201A D Digitizing Oscilloscope Figure 3 1 is the front panel of the HP 54201A D shown with numbered callouts for groups of keys The function of each key is described in the following paragraphs Figure 3 2 is a menu tree describing the row of six menu keys at the top of the HP 54201A D keyboard These menu keys are described in detail later i
96. OCK REFerence FORMat ERASe MODE GRATicule NORMal FALL SAMPle IMPedance IMPedance ERRor OFFSet INVerse UNITS FREQuency DATA SCALc LEVet LABel HEADer PROBe LINE UPPer DELete MODe POINts RANGe REFerence WINDow NWIDth FIND PROBe PREamble SCALe ROW OVERshoot INSert SCALe SOURce STORe SCReen PERiod LABel SLOPe TYPE LONGtorm TTL SHOW PREShoot MASTer SOURce VALid MENU STRing PTIMe MODE TTL XINCrement MSG TEXT PVOLt MULTiplex XORigin NODE VALues PWIDth XREFerence OPTions AESULIs PATtern YINGrement PLOT RISE PODO YORigin PRINt SCRATch PODI YREFerence READy ROY SENDvalid POD2 RECall SOURce POLarlty REQuest AQS TMAX REFerence RESet RST TMIN RESTart RESUMe TPOint SEQuence REVislon SLAVe RUN TERMs SAVE VAMP SERial SETup VBASe STAtus VMIN STOP VMAX TEST TST VPOint VRMS VTIMe 84201D Only Figure 8 1 Programming Command Tree 8 3 Model 54201A D Programming Table 8 1 Alphabetical Command Cross Reference COMMAND T WHERE USED USED COMMAND WHERE USED ACCumulate ACQuire ALLocate ARGument ASSignment AUToscale BASE BEEPer BNG CALibrate CENTered CHANnel CLOCK COLumn CONnect count GOUPIing COUPling COUPIing CURSor DATA DATA DEBug DEFine DELay DELay DELele DiGitize DISPlay DSP DUTycycle ECL ECL ERASe ERRor EVEN FALL FILTer F
97. OURce MEMory 0 1 2 3 Sets memory 0 1 2 or 3 as the waveform addressed Only memory waveforms are read write Query returns the currently selected source Command Syntax SOURce CHANnell CHANnel2 E GRAPh 1 2 MEMory 0 1 1 2 314 1 1213 1 Example OUTPUT 707 SOURCE CHANNELI Query Syntax SOURce 7 Returned Format SOURce CHANnell CHANnel2 GRAPh1 GRAPh2 Jj GRAPh3 GRAPh4 0 1 MEMoryl 1 MEMory2 MEMory3 Example OUTPUT 707 SOURCE ENTER 707 Source PRINT Source 8 133 HP 542014 0 Programming WAVEFORM SUBSYSTEM a COUPIing command query Command sets the coupling field in the wavetorm preamble Query returns the coupling for the waveform Command Syntax COUPling DC 11 21 Example OUTPUT 707 COUPLING AC Query Syntax COUP ing Returned Format COUP ing lt argument gt lt cr1f gt Example OUTPUT 707 COUPLING ENTER 707 Coup PRINT Coup COUNt command query Command sets the count parameter in the memory waveform preamble If waveform is type average count signifies both the terminal count and the number of averages sample weighting E factor For the other store modes count determines the terminal count that is the number of frames which were acquired The count parameter must be in the range to 10000 be meaningful this value should be set as follows For nor
98. POint TRIGger TTL TTL TVOLt TYPE TYPE UNITS UPPer VALid VALid VALues VBASe VMAX VMIN VPOint VAMS vTIMe vTOP WAVelorm WINDow XINCrement XORigin XREFerence YINGrement YORig n YREFerence Timebese subsystem System command Channel subsystem Timebase subsystem Trigger subsystem Measure subsystem Display subsystem Measure subsystem State subsystem System command System command Display subsystem State subsystem Trigger subsystem Graph subsystem Measure subsystem Trigger subsystem Waveform subsystem Subsystem Selector System command System command Channel subsystem Display subsystem State subsystem System command Display subsystem Subsystem selector subsystem Measure subsystem Measure subsystem Subsystem selector Channel subsystem Trigger subsystem subsystem Acquire subsystem Waveform subsystem Graph subsystem Graph subsystem Measure subsystem Waveform subsystem Display subsystem Measure subsystem Measure subsystem Measure subsystem Measure subsystem Measure subsystem Measure subsystem Measure subsystem Measure subsystem Measure subsystem Measure subsystem Subsystem selector Graph subsystem Waveform subsystem Waveform subsystem Waveform subsystem Waveform subsystem Waveform subsystem Waveform subsystem 8 4 HP 54201A D Programming 8 3 COMMAND ABBREVIATIONS Every command and every alpha para
99. PVOLt PWIDth RANGe RANGe READy RDY RECall REFerence REFerence REFerence REQuest ROS RESTart RESULItS RESUMe RST REVislon RISE ROW RUN System command Channe subsystem State subsystem Waveform subsystem Trigger subsystem Display subsystem System command Graph subsystem State subsystem Subsystem selector System command Graph subsystem Channel subsystem Measure subsystem State subsystem Timebase subsystem Trigger subsystem System command State subsystem System command Graph subsystem Measure subsystem State subsystem Channel subsystem System command Measure subsystem State subsystem Measure subsystem System command State subsystem State subsystem State subsystem Acquire subsystem Waveform subsystem State subsystem Waveform subsystem Measure subsystem System command Channel subsystem Trigger subsystem Measure subsystem Measure subsystem Measure subsystem Channel subsystem Timebase subsystem System command System command Display subsystem State subsystem Timebase subsystem System command State subsystem Measure subsystem System command System command System command Measure subsystem Display subsystem System command Tt SAMPle SAVE SCALa SCALe SCALe SCRATch SCReen SENDvalid SEQuence SERial SETup SHOW SLAVe SLOPe SOURce SOURce SOURce SOURce STATe STAtus STOP STORe STRing TEAMS TEST TST TEXT TiMebase TMAX TMIN T
100. Programming command tree 8 3 Programming examples 8 7 Programming 8 1 PTIMe 2 8 91 Pulse width vee 3 5 4 7 PVOLt PWIDth Q Qualified mode 5 12 QUIE ei 8 8 HP 54201A D Index R RANGe 8 57 RANGe Timebase MEN 8 117 aU ORE 8 120 8 31 READY 8 31 Real sampling 3 28 8 119 Rear panel 3 8 RECALL key 3 2 8 32 Recovery 4 9 REFerence Display 8 66 REFerence State 8 105 REFerence Timebase 8 118 Reference 3 28 Reference lines sys 3 16 3 30 Remote control 7 1 Remote message 7 10 Remote mode 7 5 Repetitive sampling 3 28 8 119 REQUGSE 8 32 Require service message 7 11 RESTart RESULts RESUME key RESUMe REVision SCALe Channel 8 57 SCALe Timebase 8 119 SCALe Trigger 2 SCRATch SCReen Self test SENGvalid 2 2222222 22 2 2 4
101. Putting answers on screen or readout via HP IB Fundamental Measurements readout only HP 54201A D Programming MEASURE SUBSYSTEM MEASure Ci 1 t rm DEF ine DeLay Je 9 Positive N t2 POSItIve 0 s C 4 SCRotch SOURce 9000 w VALId MEASure Subsystem Syntax Diagram HP 54201A D Programming MEASURE SUBSYSTEM DEFINED MEASURMENTS 8 80 RESULts DELay graph DUTycycle FALL FREQuency NWIDth OVERshoot PERIod PREShoot PWIDth TMIN VAVE VBASe 5 8 Subsystem Syntax Diagram Cont 96000 HP 54201A D Programming MEASURE SUBSYSTEM 4 PvoLt voltage jC mf stops occurence Tine FUNDAMENTAL MEASURMENTS VTIMe VPOint CURSOR CURSor VALUES 85420107 MEASure Subsystem Syntax Diagram cont SETTING THE MEASUREMENT ENVIRONMENT HP 54201A D provides two basic modes for measurements standard and user defined In standard mode graph reference levels are preset and measurement definitions are fixed user defined mode reference levels may be individually selected for each
102. RECEIVING THE PASS CONTROL MESSAGE The HP 54201A D does not implement the controller subset therefore it does not respond to the Pass Control message 7 29 SENDING THE REQUIRE SERVICE MESSAGE The HP 54201A D sends the Require Service message by setting the SRQ bus control line and bit 6 of the status byte true when a previously programmed condition occurs The instrument can send the Require Service message in either local or remote mode The Require Service message is cleared when a serial poll is executed by the system controller During serial poll the SRQ control line is reset immediately before the instrument places the Status Byte message on the bus Table 7 3 includes the conditions that can be selected to cause the Require Service message If no conditions are selected the Require Service message is disabled The 54201A D indicates having sent the Require Service message by displaying SRQ in the HP IB status display This indicator is turned off during the serial poll when the SRQ control line is reset If the HP 54201A D is set to talk only mode it cannot send the Require Service message HP 54201A D Remote Control 7 30 SENDING THE STATUS BYTE MESSAGE The Status Byte message consists of one 8 bit byte in which the bits are set according to the conditions described by Table 7 3 The HP 54201A D sends the Status Byte message when it is d to talk and it receives the Serial Poll Enable SPE bus command from the HP
103. Rce command query Command selects the data source for the currently addressed graph When a new source is Selected for a graph the graph is initialized to an unexpanded i e normal display of the waveform data Query returns the data source displayed on the addressed graph Command Syntax SOURce CHANneT1l 1 CHANnel2 2 OFF MEMory 0111213 Example OUTPUT 707 SOURCE CHANNELI Query Syntax SOURce 2 Returned Format SOURce 11 1 CHANnel2 OFF MEMoryO MEMoryl 1 MEMory2 MEMory3 Example OUTPUT 707 SOURCE ENTER 707 Source PRINT Source 8 73 HP 54201A D Programming GRAPH SUBSYSTEM UNITs command query Command sets the measurement threshold units when user defined measurement mode is selected Each units selection has its own settings for upper middle and lower Query returns the units selection in the user defined mode for the addressed graph Note If the 54201A D is currently in standard measurement mode the query will still return the user defined UNITS selection Command Syntax UNITs PERCent 0 VOLTs 1 TTL 2 ECL 3 Example OUTPUT 707 UNITS PERCENT Query Syntax UNITs Returned Format UNITs lt argument gt lt crl f gt Example OUTPUT 707 UNITS ENTER 707 Units PRINT Units Ne command query Command sets upper measurement threshold if UNITs
104. Returned Format SETup block type A gt Example DIM Learn 982 OUTPUT 707 HEADER OFF SETUP ENTER 707 USING K Learn Command Syntax 5 lt A gt lt number of bytes in learn string learn string Example OUTPUT 707 USING K SETUP Learn M M STAtus query The instrument status word is a 16 bit binary word which is returned as an integer and contains information about the instrument conditions that set the ready bit in the status byte and or generate a Require Service message The upper 8 bits of the status word are known collectively as the ready byte while the lower 8 bits correspond to the status byte sent during a serial poll The STAtus query is used to read the status word representing the current status of the HP 54201A D Unlike the response to a serial poll the conditions are dynamic not latched Therefore the status response reflects current status A companion 16 bit word the request mask is used to specify both those conditions in the ready byte that set the ready bit in the status byte and those conditions in the status byte that generate a Require Service message The bits in the request mask have the same meanings as those in the instrument status word The ready bit in the status byte is set when all of the conditions corresponding to bits in the ready mask are true at the same time This bit is actually set on the transition of the last condition to become true The REQ
105. S lt SRQ enable code Example OUTPUT 707 RQS 56 Query Syntax REQuest RQS 7 Returned Format REQuest SRQ enable gt lt 1 gt Example OUTPUT 707 REQUEST ENTER 707 Request PRINT Request 8 32 HP 54201A D Programming SYSTEM COMMANDS REQuest RQS cont The ready mask is defined as follows The Ready Mask BIT MASK READY BIT CONDITION WEIGHT 13 32768 Not used always O 16384 Cal High indicates that self calibration has completed execution 8192 Test High indicates that the requested self test has completed execution 12 4096 Hard Hardcopy complete High indicates that the last byte of printer or plotter dump has been sent and received 11 2048 Data Data available High indicates that something is in the buffer waiting to be read 10 1024 Acq Acquisition complete High indicates that all waveforms are acquired 512 Trig Triggered High indicates that the instrument is receiving triggers Can only be set while running if stopped reflects status previous to stopping 256 Parse Parse complete High indicates that the last command has been completely parsed Note To set the RDY bit in the status byte all of the conditions set true 1 in the ready mask must be true in the READY registers logical AND 8 33 HP 54201A D Programming SYSTEM COMMANDS REQuest RQS cont The RQS mask is defined as follows The Status Mas
106. S Measurement menu 3 4 MEASUREMENT FUNCTIONS Twelve automalic pulse parameter measurements may be made from the keyboard on any specified graph These measurements are frequency 1 period PERIOD time from first edge to next like edge WIDTH pulse width WIDTH pulse width RISE rise time FALL fall time DUTY duty cycle width period DELAY delay from first edge on graph to first edge on another graph minimum delay maximum delay average delay or delay of last acquisition V ampl voltage amplitude 0 to 100 V max absolute maximum voltage V min absolute minimum voltage V ms rms voltage timing measurements except frequency and period are threshold dependent Standard thresholds may be used or user defined thresholds may be specified in the STATUS Measurement menu Up to 3 time measurements may be displayed on the upper left portion of the display and up to 3 voltage measurements may be displayed on the upper right portion of the display These measurements are updated each time the HP 54201A D acquires new data 3 5 MENU KEYS 0 The row of six keys at the top of the HP 54201A D keyboard are menu keys that define the CRT display The menu keys are toggle keys pressing a menu key causes the menu to be displayed pressing the menu key again clears the menu and restores the normal trace display for the current operating state Menu keys SYSTEM STATUS and DISPLAY and TRIG for HP 54201D oniy have
107. SCALe lt argument gt lt crl f gt Example OUTPUT 707 SCALE ENTER 707 Scale PRINT Scale 8 119 HP 54201A D Programming TIMEBASE SUBSYSTEM m M M M RATE command query Command sets time range in terms of sample rate Sample period is range 1000 rate is 1 period The rate is displayed on the HP 54201A D time menu in the Sampling field when in real time mode When operating in repetitive mode rate is in terms of effective sample rate Query returns the current sample rate Command Syntax RATE NR3 Example OUTPUT 707 1067 Query Syntax RATE 2 Returned Format RATE lt NR3 gt lt cr1f gt Example OUTPUT 707 RATE ENTER 707 Rate PRINT Rate 8 120 54201A D Programming TRIGGER SUBSYSTEM TRIGger command query The trigger group controls all analog trigger functions The TRIGger command selects trigger subsystem as the destination for the trigger commands that follow Included are the analog trigger and the overall selection of trigger mode analog armed state only The TRIGger query responds with all of the settings for the analog trigger Command Syntax TRIGger Example OUTPUT 707 TRIGGER Query Syntax TRIGger 2 Returned Format TRIGger lt cr1f gt MODE argument cr lf SOURce CHANneT NR1 EXTernal lt cr f gt PROBe NR3 cr1f SLOPe lt argument gt lt cr f gt LEVe1 NR3 cr1f COUPTing argument crlf
108. T 707 IMPEDANCE HIGH Query Syntax 2 Returned Format IMPedance lt argument gt lt cr f gt Example OUTPUT 707 IMPEDANCE ENTER 707 Imped PRINT Imped 8 126 HP 54201A D Programming TRIGGER SUBSYSTEM LEVel command query Command sets trigger level of selected source Valid range for internal source is 4 75 times full scale of internal source range If currently set to centered mode LEVel defaults trigger level to adjust mode in addition to setting the specified trigger level Valid range for external trigger source is 2 V with 1 1 probe Query returns the trigger level of the selected source Command Syntax LEVel lt NR3 gt Example OUTPUT 707 LEVEL 350E 3 Query Syntax LEVel Returned Format LEVel lt NR3 gt lt cr1f gt Example OUTPUT 707 LEVEL ENTER 707 Level PRINT Level PROBe command query Command sets the trigger probe attenuation factor If trigger source is external low impedance PROBe may be set to 1 2 5 10 20 50 or 100 If external high impedance PROBe must be set to 10 If internal trigger source is selected PROBe may be programmed but must match the CHANnel PROBe setting Query returns the probe factor of the current trigger source Command Syntax PROBE lt NRI gt Example OUTPUT 707 PROBE 10 Query Syntax PROBe Returned Format PROBe NR3 crlf Example OUTPUT 707 PROBE ENTER 707 Probe PRINT Probe B 127 HP 54201A D
109. TER 707 Tvolt PRINT Tvolt HP 54201A D Programming MEASURE SUBSYSTEM Fundamental Measurements cont TPOint query Query returns the time of the specified point 1 to 1001 Query Syntax TPOint point number Returned Format TPOint NR3 crlf Example DIM Tpoint 25 OUTPUT 707 TPOINT 267 ENTER 707 Tpoint PRINT Tpoint VPOint query Query returns the voltage of the specified point 1 to 1001 Note if the waveform is type envelope and user mode is selected for measurements the user definition of minjmax is used to select which waveform to measure Query Syntax VPOint point number 2 Returned Format VPOint NR3 crlf Example DIM Vpoint 25 OUTPUT 707 VPOINT 426 2 ENTER 707 Vpoint PRINT Vpoint HP 54201A D Programming MEASURE SUBSYSTEM Cursor Values Although the cursors are not programmable via the HP IB the cursor values may be read CURSor query If a query with X or argument is executed the 54201A D returns an X y pair representing the time and voltage at the point of the specified cursor If a query with the DELTa argument is executed the HP 54201A D returns an pair representing the A time and A voltage between the points of the X and the O cursors The optional validity parameter is only returned if the SENDvalid command has been set to ON Query Syntax CURSor DELTa X 0 Returned Format CURSor lt argument gt lt Time
110. TOP 50 1 83 R 18 RESUME 5i 2 84 19 AUTO SCALE 52 3 85 T 20 ECL 53 4 86 U 21 HARDCOPY 54 5 87 22 55 6 88 w 23 CLEAR ENTRY 56 7 89 x 24 INSERT 57 B 90 Y 25 DELETE 58 9 91 2 26 LOCAL 59 Not assigned 92 RISE MEASUREMENT 27 CURSOR VALUES 60 EDGE 93 FALL MEASUREMENT 28 DON T CARE 61 EDGE 94 DUTY MEASUREMENT 29 CURSOR X 62 FREQ MEASUREMENT 95 DELAY MEASUREMENT 30 CURSOR O 63 PERIOD MEASUREMENT 96 Vampl MEASUREMENT 31 CURSOR X amp O 64 4WIDTH 97 MEASUREMENT 32 CURSOR NORM 65 WIDTH MEASUREMENT 98 Vmin MEASUREMENT 33 CURSOR EXPAND 66 A 99 Vrms MEASUREMENT BLUE SHIFT KEY 8 25 HP 54201A D Programming SYSTEM COMMANDS eee LONGform command query Command sets longform mode for instrument responses to queries OFF then command headers and alpha arguments are sent from HP 54201A D in the abbreviated form else the whole word is output This does not affect input data messages to the HP 54201A D headers and arguments may be input to the HP 54201A D in either long or short form regardless of how the LONGform command is set LONGform is set OFF by the RESet command Query returns the LONGform status Command Syntax LONGform ON 1 OFF 0 Example OUTPUT 707 LONG 1 Query Syntax LONGform 2 Returned Format LONGform lt argument gt lt cr gt Example OUTPUT 707 LONGFORM ENTER 707 Long PRINT Long MENU command query Comm
111. TPUT 707 COUNT 154 Query Syntax COUNt Returned Format COUNt NRI cr f Example OUTPUT 707 COUNT ENTER 707 Count PRINT Count 8 111 HP 54201A D Programming STATE SUBSYSTEM V R OF command query Command defines the trigger term 1 to 4 terms may be used in the compound expression Only one term may be specified if using ANYState list item The TERMs command defines whether the terms or or and This command is not valid for missing bit and extra bit modes Query returns the compound trigger term Command Syntax lt sequence trigger list gt sequence trigger list lt 115 item gt lt list item list item gt lt list item gt list item ANYState 1 121 131 4 D 5 NOTA 16 NOTB 17 NOTC 81 NOTD Query Syntax OF Returned Format OF sequence trigger list crlf Example DIM Of 50 OUTPUT 707 0F ENTER 707 0f PRINT Of TERMS command query Command defines whether to or or and the trigger terms Query returns the and or or mode for the trigger terms Command Syntax TERMs OR 0 AND 1 J Example OUTPUT 707 TERMS AND Query Syntax TERMs 2 Returned Format TERMs lt argument gt lt cr1f gt Example OUTPUT 707 TERMS ENTER 707 Terms PRINT Terms 8 112 HP 54201A D Programming STATE SUBSYSTEM M e RESTart command query Define
112. The comparator thresholds for each of the pods may be set to a level suitable for TTL ECL or may be user defined in volts MULTIPLEXING The clocks may be multiplexed in Normal mode for use with microprocessors that multiplex their data and address lines LABELS Up to eight different five character labels may be designated in Normal and Qualified mode for any combination of input lines for ease in setting specifications Missing bit mode and Extra bit mode only allow one label To enter a label use the alphabetic characters provided when the shift key is active To obtain more labels move the blinking field cursor to the first label field then press INSERT To remove a label move the blinking field cursor to that label and press DELETE shift INSERT POL This field selects logic polarity Selecting plus indicates positive logic voltages above the threshold are logic 1 and voltages below the threshold are logic 0 Selecting minus indicates negative logic voltages above the threshold are logic 0 and voltages below the threshold are logic 1 POD ASSIGNMENT This field assigns a particular state channel to a grouping defined by the label An asterisk means the channel is active A period means the channel is not part of that grouping 5 20 HP 54201A D State Triggering Trigger BEATE _____________ Status No Trigger Found TALK ONLY Define Trigger Mode Slave Clock Master Clock JKL JEL State Mode MENEN
113. UT 707 INSERT 8 108 HP 54201A D Programming STATE SUBSYSTEM PATtern command query Command defines the selected resource term for the addressed label Pattern D is not allowed for missing or extra bit modes Query returns the specified pattern expression for the addressed label Command Syntax PATtern lt which pattern gt lt pattern expression gt lt which pattern A B C D H lt hexadecimal expression gt decimal expression 0 lt octal expression lt binary expression pattern expression lt hexadecimal expression 01112131415 6 7 8 9 cid e f A BIC D E F X 11171 011121314 1516171819 1 1 1119 01112131415 61718 X 1119 0 1 X 2011271 decimal expression u lt octal expression lt binary expression Note valid for query only An X specifies a don t care state while a specifies an undefined state Don t cares in one value base cannot always be translated to another base Example OUTPUT 707 PATTERN 01110001 Query Syntax PATtern which pattern 7 Returned Format PATtern which pattern gt lt pattern expression gt lt cr f gt Example DIM Pattern 50 OUTPUT 707 PATTERN ENTER 707 Pattern PRINT Pattern 8 109 HP 54201A D Programming STATE SUBSYSTEM Sequence Commands SEQuence command query Command enables sequence queries to be returned intac
114. UTycycle FALL FREQuency NWIDth OVERshoot PERiod PREShoot PWIDth RISE TMAX TMIN VAMP delay from first specified edge on one graph to the next specified edge on same graph or to first specified edge on another graph WIDth PERiod fall time of first falling edge from upper to lower threshold 1 PERiod AT from first falling edge threshold to next rising edge threshold VMAX AT from first edge middle threshold to next like edge middle threshold VMIN AT from first rising edge threshold to next falling edge threshold Rise time of first rising edge from lower to upper threshold Time at which first occurrence of VMAX occurred Time at which first occurrence of VMIN occurred VBASe see note next page 8 87 HP 54201A D Programming MEASURE SUBSYSTEM n VBASe VMAX VMIN VRMS VTOP Defined Measurements cont Average voltage calculated on full period of waveform if available else calculation based on full graph 0 level voltage see note below Absolute maximum voltage Absolute minimum voltage VMAX VMIN True rms voltage dc ac component Ac couple to remove ac component Calculated on full period of waveform if available else calculation based on full graph 100 level voltage see note below Note The 0 level and 100 level are determined from the occurrence density histogram of the data points
115. V 6 0 V 2 5 V 6 0 V 1 4 V ECL STATUS MENU STATUS Configuration Setup Label XXXXXXXX Measurement Standard channel Settings I Timebase settings tTrigger Settings Graph 1 Percent 7 upper 55 99 Defined Graph 2 4 Lower 01 45 Graph 3 r TTL j graph 4 j ECL volts J voer XXX V Lower Xxx V jx aWidth aT fram Lower to Lower I fMiddle to Middle Tupper to Upper l width AT from T tower to f Lower to f Middle upper to Upper LDelay AT from t Lower terit Lower Git Middle Upper Upper Memory Setup Memorias 0 pProtect 7 ves 1 No 1 2 i Label XXXXXXXXXX Waveform Memories Protect Yes Tbe 2 3 PL abe Store Mode Normal Average Envelope Data CHANNEL MENU cHANne 1 Range xxx 2 Pfset XXXx V Autoscale Enabled D1isabied Store Mode Normal ES ere is verage 4 p 116 piss i 256 Probe ing ac 50 SYSTEM MENU SYSTEM Peripherals p HP 1B Address MIRI SM Talk Only Device isiny Printer Plotter I Rear Panel BNC 1 Constant Low 1 Constant High Probe Compensation 2 kHz High on Trigger High on Frame Complete High on Acquisiti
116. Ved FORD SUHPLUS ENTERPRISES DIVISION OF 3125661 CANADA INC 21 MARKET ST carner Market William Box 606 SMITHS FALLS ONT ELEPHONE 613 283 5195 FAX 613 2830697 B PACKARD OPERATING AND PROGRAMMING MANUAL HP 54201A D DIGITIZING OSCILLOSCOPE COPYRIGHT HEWLETT PACKARD COMPANY COLORADO SPRINGS DIVISION 1986 1900 GARDEN OF THE GODS ROAD COLORADO SPRINGS COLORADO U S A ALL RIGHTS RESERVED Manual Part No 54201 90901 Microfiche Part No 54201 90801 PRINTED JANUARY 1986 SAFETY This product has been designed and tested according to International Safety Requirements To ensure safe operation and to keep the product safe the information cautions and warnings in this manual must be heeded Refer to Section and the Safety Summary for general safety considerations applicable to this product This apparatus has been designed and tested in accordance with IEC publication 348 safety requirements for electronic measuring apparatus and has been supplied in a safe condition This manual contains some information and warnings which have to be followed by the user to ensure safe operation and to retain the apparatus in safe condition CERTIFICATION Hewlett Packard Company certifies that this product met its published specifications at the time of shipment from the factory Hewlett Packard further certifies that its calibration measurements are traceable to the United States Nat
117. Y The status of the HP 54201A D on the HP IB is annunciated on the CRT by an HP IB status message This message describes the HP 54201A D remote local status address status and whether the instrument is requesting service via the SHQ bus control line 74 HP 4201A D Remote Control Table 7 1 Used Code Conversions NOTES 1 2 T n MTA assigned to device number lt n gt 3 Meaning defined by Primary Command Group code 7 2 iL lt n gt MLA assigned to device number n T Ir Y ASCII Decimal Binary HP IB ASCII Decimal Binary Octal Hexa L _ md Addressed NUL D 00 000 000 000 00 Talk TO e 64 01 000 000 Command GTL SOH 1 00 000 001 001 01 Address Ti A 65 01 000 001 50 Group STX 2 00 000 010 002 02 Group T2 B 66 01 000 010 102 42 3 00 000 011 003 03 TAG T3 87 01 000 011 103 43 Note 2 SDC EOT 4 00 000 100 004 04 T4 D 68 01 000 100 104 44 5 00 000 101 005 05 T5 E 69 01 000 101 105 45 ACK 00 000 110 006 06 T6 F 70 01 000 110 106 46 BEL 7 00 000 111 007 07 T G 71 01 000 111 107 47 GET BS 8 00 001 000 010 08 T8 H 72 01 001 000 110 48 TCT HT 9 00 001 001 011 08 73 01 001 001 111 49 10 00 001 010 012 0A T10 J 74 01 001 010 112 4A VT 11 00 001 011 013 T11 K 75 01 001 011 113 4B FF 12 90 001 100 014
118. addressed label and sets the base for query responses Binary is the most useful in many cases since any pattern of don t cares is expressible without Query returns the selected display base Command Syntax BINary 10 OCTal 11 DECimal 121 HEXadecimal 31 Example OUTPUT 707 HEXADECIMAL Query Syntax BASE Returned Format BASE argument crlf Example OUTPUT 707 BASE ENTER 707 Base PRINT Base te DELete command Command which deletes either all labels or the label specified If all labels are deleted temporary place holding label is written to the first label location since front panel operation requires at least one label to be displayed However this label is replaced when a new label is defined with the LABel command or the INSert command The place holder is considered a valid label if any of its attributes are changed or after reset or power cycle and it is used for triggering Command Syntax DELete ALL lt 5 characters quoted gt Example OUTPUT 707 DELETE DATA M re INSert command Command allows a new label to be added to the list directly following the currently addressed label Similar in action to the label command except the label name must be unique that is the insert command cannot be used to merely address a label Refer to the LABel command for more details Command Syntax INSert 5 characters quoted Example OUTP
119. ages contain a string of device dependent commands program commands and End of String EOS message The program codes within a Data message are executed after the EOS message is received The following format rules must be observed for all input Data messages A linefeed lt LF gt or an EO are used as the End of String EOS message Each message must be terminated by a LF or by asserting the bus signal line with the last byte in the message The carriage return character CR is not required before LF Preceding LF CR is treated as no operation and may be repeated as many times as permitted by the maximum string length limitation When several program commands are sent in a Data message a semicolon preferred or space must be used to separate each program command from each other Multiple arguments for a command must be separated by commas The maximum length of a Data message is 256 characters including semicolons commas SP CR and LF except those messages that contain binary data blocks Binary data blocks must begin within the first 256 bytes of the data message 8 11 Program Order Considerations Commands are interpreted and setups are changed in the HP 54201A D as they are received and found to be syntactically correct Commands preceding an error in multi command messages are executed up to the point where the error is detected This provides consist
120. alk Only mode The hardcopy device may be specified as printer or plotter on the same menu The printer or plotter connected to the HP 54201A D must be in the Listen Only mode Alpha Characters O O The alpha characters A through Z are all shifted functions and are used to define labels on graphs setup memories wavetorm memories and state trigger lines HP 54201D only Alpha characters G through Z share keys with other shifted functions The 54201A D determines if the alpha function should apply or if the other secondary function should apply depending on the selection field being modified 3 3 CURSOR FUNCTIONS a The HP 54201A D has an X and an O cursor that can be moved about on the waveform displays All waveform cursor functions are accessed in the SHIFT mode Keys X O and X amp O select the active waveform cursor or cursors Cursor functions such as movement expansion or jump to edge operate only on the active cursor The cursor VALUES key is a toggle function which changes the left hand side of the display from graph labeling information to cursor measurement information and vice versa Cursor measurement information displayed is Active cursor Voltage at cursor X Time at cursor X trom trigger point Voltage at cursor O Time at cursor O trom trigger point Voltage difference between cursor O and cursor X AV Time difference between cursor O and cursor X AT The cursor EXPAND key expands to full screen the section of
121. alpha arguments such as ON or OFF These arguments are strings that start with an alpha character and are followed by printable character except a SP lt gt lt gt lt gt or DEL 8 13 General Program Command Format Rules The general rules of program command format are The HP 54201A D sends and receives Data messages in standard 7 bit ASCII code The instrument responds equally to upper and lower case characters The instrument responds equally to longform and shortform command headers and alpha arguments The instrument responds equally to alpha and numeric arguments Parameter fields containing multiple parameters require a comma to delimit individual parameters Alpha arguments must be separated from the command header with a space numeric enumerated arguments and queries do not require a space Errors in Data messages syntax are trapped and can be reported via the HP IB For details about detecting and reporting format errors refer to the system STAtus and ERRor programming commands 8 9 HP 54201A D Programming Integer Format 1 C 8 Decimal Format NR2 Exponential Format NR3 bom lsu digit digit digit C 85420011 Figure 8 2 Numeric Formats NR1 NR2 and NR3 used in Command Arguments HP 54201A D Programming SYSTEM COMMAN
122. amples for a given data point are averaged together The FILTer query returns the data filter mode A slight speed enhancement is obtained by turning the filter off when acquiring averaged waveforms The only benefit of the filter on this type of waveform is the low pass characteristic of the filter since averaging produces greater than 7 bit resolution The filter should be turned off when the absolute magnitude of individual data points is important to the measurement such as when performing a Vmax measurement and there are fewer than three samples on the waveform peak The filter should also be turned off when measuring a deliberately aliased signal such as in swept frequency response measurements Command Syntax FilTer ON 1 OFF 0 Example OUTPUT 707 FILTER ON Query Syntax FILTer Returned Format FILTer argument cr f Example OUTPUT 707 FILTER ENTER 707 Filter PRINT Filter HP 54201A D Programming ACQUIRE SUBSYSTEM POINts command query Command does nothing but must be a valid integer Query returns the number of data points acquired 1001 Command Syntax POINts NRI Example OUTPUT 707 POINTS 1001 Query Syntax POINts 2 Returned Format POINts lt NR1 gt lt cr1f gt Example OUTPUT 707 POINTS ENTER 707 Points PRINT Points PLC A e TYPE command query Command sets the data type for all active sources and makes the count setting of channel 2 the
123. an 8 bit DAC with a 5 bit address bus decoded to select the DAC chip select input In the state trigger Assignment menu select the Trigger Mode to be State Only the State Mode to be Normal and Multiplexing to be Off One of the clock lines should be connected to an I O write control line for the microprocessor In this example figure 5 3 the rising edge of the J clock from Pod 2 has been assigned as the state clock Move the blinking cursor down to the first label field and change the label to ADDR To assign the lower five bits of Pod 2 to monitor the 5 bit address bus move the cursor into the asterisk field and press the NEXT or PREV key until only the last five bits of Pod 2 have an while all other bits of Pod 1 and 2 have assigned Placing in the field is called masking off or ignoring a bit While the cursor is on the top Label line press the INSERT key to create a new Label assignment line Label this line DATA and mask off all bits except the last eight bits of Pod 1 The state trigger Assignment menu should now be completely set up to define the inputs as shown in figure 5 4 The actual trigger conditions required are defined by the state trigger Sequence menu This menu is discussed in the next section 54201D POD 1 012345678 f 06 07 ANALOG QUT B5420111 Figure 5 3 Example Normal Mode State Triggering Setup HP 54201A D Sta
124. an display four different sets of information graph labels cursor values reference line values and out of range arrows Graph Labels The graph labels tell what source of information is being displayed on each graph Chan 1 Chan 2 Trig Mem 0 Mem 1 Mem 2 Mem 3 or Off The label for a graph may be changed by pressing the NEXT or PREV key If a user defined line has been defined on the STATUS menu for a source that label is displayed directly below the graph label Cursor Values Pressing SHIFT VALUES toggles between the graph labels and cursor values When cursor values is selected the following information is displayed Voltage at X cursor Time from trigger to X cursor Voltage at O cursor Time from trigger to O cursor Delta voltage from O cursor to X cursor Delta time from cursor to X cursor Reference Line Values Reference line values for graphs may be displayed and can be changed by selecting the DISPLAY menu and selecting Define Reference Lines Each graph can be assigned two threshold levels for automatic measurements or for visual reference The levels may be specified in either volts or as a percent of the waveform amplitude or ECL or TTL preset values may be selected Out of range Arrows Just outside the left margin of each graph a small arrow appears whenever the waveform is driven off screen Vertical arrows indicate that a portion of the graph information is off screen either above or below the graph and not
125. and displays the desired menu Menus 41 and 42 are available for the HP54201D only The HP 54201A treats 41 or 42 as parameter errors Query returns the current menu selected Command Syntax MENU 0 None measurement answers 10 System Peripherals 11 System Calibration 12 System Self Tests 20 Status Configuration 21 Status Measurements 22 Status Memory 30 Display 40 Trigger Analog 41 Trigger State Assignment 42 Trigger State Sequence 50 Channel 1 51 Channel 2 60 Timebase 70 Text see Display subsystem TEXT command Example OUTPUT 707 MENU 40 Query Syntax MENU Returned Format MENU lt NR1 gt lt crl1f gt Example OUTPUT 707 MENU ENTER 707 Menu PRINT Menu HP 54201A D Programming SYSTEM COMMANDS _ MSG query Query which responds with the message code for the first advisory since MSG query device clear RESet instrument power on or RQS lt mask spec If STRing is specified a quoted string up to 32 characters long is returned NUMber is specified or no argument is sent only the message number is returned Text Status Warning and Wait messages but not ERRor messages are returned Refer to system ERRor query for error messages The MSG query clears the advisory bit in the status byte if set and no SRQ is pending Query Syntax 56 NUMber 01 STRing 1 1 Ret
126. anges required at one time then select another subsystem and make all changes and so on Note that once a subsystem is selected it remains selected until either a new subsystem is selected the system commands NODE or RESet are received or the HP IB clear meta message see table 7 2 is received Once selected a subsystem may be programmed with one data message with multiple commands or may be programmed with several data messages with single commands whichever is convenient For example a task may be output as a single data message with multiple commands OUTPUT 707 WAVEFORM SOURCE MEMORYI COUPLING DC or may be sent as multiple data messages each with a single command OUTPUT 707 WAVEFORM OUTPUT 707 SOURCE 1 OUTPUT 707 COUPLING DC However best performance is obtained when longer data messages are transmitted that fully utilize the HP 54201A D 256 byte input buffer 8 2 HP 54201A D Programming 54201A D SYSTEM COMMANDS 1 ARGument AUToscale SUBSYSTEM SELECTORS WITH COMMANDS BEEPer BNC r T T zb sro CALibrate ACQuire CHANnelcN DISPlay GRAPh N MEASure STATe TiMebase TRiGger WaAVeform COPY DEBug COUNt COUPting ACCumulate SOURce CURSor ALLocate DELay COUNt DiGitize FILTer ECL COLumn EXPand DEFine ASSignment MODE COUPIIng COUPIing DSP POINts IMPedance CONnect LOWer DELay BASE RANGe EOI TYPE LABel FORMat DUTycycle CL
127. anual 7 6 HP 54201A D Remote Control 7 12 Talk oniy Mode If the instrument is set to talk only mode it is always configured as a talker and does not respond to any of the bus messages This mode must be selected if the HP 54201A D is to drive a printer or a plotter without the aid of an HP IB controller Refer to Section 6 of this manual for more information on use of the HP 54201A D with a printer or plotter 7 13 HP IB TURN ON DEFAULT CONDITIONS Several HP IB parameters are reset at power on However both the instrument address and addressing mode are preserved in non volatile memory HP IB parameter default conditions are HP IB local mode Local lockout cleared Unaddressed if in normal addressing mode Status byte register cleared 7 14 DATA MESSAGES The HP 54201A D communicates on the HP IB primarily with Data messages The instrument interprets a byte on the eight bus data lines as a Data message when the bus is in the data mode Attention control line ATN false The instrument can both receive and send Data messages Input Data messages include the instrument program commands device dependent commands used to program front panel functions menu functions and all remote functions Output Data messages include instrument status information the settings of specific functions measurement results and the Learn String and waveforms Of special consideration is the Learn String which can be sent and recei
128. are basic voltage time and point queries that can be used to create custom measurements not handled by the defined measurements All queries reference the current measurement source waveform PTIMe VTIMe PVOLt TVOLt TPOint VPOint _ PTIMe query If point of time is requested the nearest point preceding the requested time is returned Query Syntax time 7 Returned Format PTIMe lt NR1 gt lt cr f gt Example DIM Ptime 25 OUTPUT 707 PTIME 500E 6 2 ENTER 707 Ptime PRINT Ptime i ed VTIMe query Query returns the interpolated voltage at the specified time Note If the waveform is type envelope and user mode is selected for measurements the user definition of is used to select which waveform to measure Query Syntax VTIMe time Returned Format VTIMe lt NR3 gt lt cr1f gt Example DIM Vtime 25 OUTPUT 707 VTIME 2E 3 ENTER 707 Vtime PRINT Vtime 8 91 542014 Programming MEASURE SUBSYSTEM ________ Fundamental Measurements cont PVOLt query When point of voltage is requested the waveform is searched from the first displayed point until an interval is found that contains the requested voltage The sign of siope amp occurrence selects rising or falling edge The magnitude of this parameter selects the occurrence count For example if slope amp
129. at 11 waveforms are acquired 512 Trig Triggered High indicates that the instrument is receiving triggers Parse Parse complete High indicates that the last command has completed parsing Note The Ready bit bit 4 of the Status Byte Table 7 3 is set if all of the ready conditions specified in the RQS mask are true HP 54201A D Programming SECTION 8 PROGRAMMING THE HP 54201A D 8 1 INTRODUCTION This section provides instructions to allow you to program the HP 54201A D The HP 54201A D is a fully HP IB bus programmable instrument Menu functions except protect status on memories remote only functions and front panel functions except the line switch and cursor movements are programmable through the HP IB 8 2 COMMAND STRUCTURE The HP 54201A D programming commands are divided into three types system commands subsystem selectors and subsystem commands A programming command tree is shown in figure 8 1 and a programming command cross reference is shown in table 8 1 System commands control general oscilloscope functions and may be issued at any time They do not change the subsystem selection Subsystem selectors are special system commands that address portions of the instrument Only one subsystem may be selected at any given time At power on no subsystem is selected The nine subsystems are Acquire allows the store mode for Channel 1 and Channel 2 to be set at the same time Channel con
130. ating procedure practice or the like which if not correctly performed or adhered to could result In damage to or destruction of part or all of the product Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood or met SC1D984 HP 54201A D Table of Contents TABLE OF CONTENTS SECTION 1 GENERAL INFORMATION Introductiors us our decere n Manual Organization Description Accessories Supplied SECTION 2 GETTING STARTED Pfeparationfor 9s remi ee ehe deed iato te enin dd ncaa ey evi end Oe Power Requirements Line Voltage Selection Power Operating Environment vi Cleaning Requirements 4 0 0 0 0 1 2 SECTION 3 FRONT PANEL CONTROLS AND MENUS 076 Mn Keyboard Cursor Functions Measurement Functions Menu Keys SYSTEM Menu SYSTEM Peripherals Submenu SYSTEM Calibration Submenu SYSTEM Test amp Service Submenu STATUS Menu STATUS Configuration Submenu STATUS Measurement Submenu STATUS Memory Submenu sui DISPLAY MONU 4 4 TRIG MENU 9444 TRIG Analog Submenu TRIG State Su
131. ay be used in any combination to define a sequence of events on which to be triggered Initially only one term is shown To add more terms move the blinking field cursor to the occurrences field and press INSERT Up to three more terms may be added To remove a term move the blinking cursor to that term and press the DELETE key Trigger MESE 1L Status No Trigger Found TALK ONLY Define Trigger Mode In Sequence Find Trigger Teri then then then Count g Occurrences of then Trigge ju isition Sequence Restart an 1 ADDR DATA gt Figure 5 21 Example State Trigger Sequence Menu 5 22 HP 54201A D State Triggering LAST SEQUENCE TERM All four resource terms and their not equal terms may be used in any ORed or ANDed configuration to specify the last sequence term To do this move the blinking field cursor to the last sequence term after occurrence specification and change any state to the desired resource term either b c d b c or For more terms press INSERT while the blinking field cursor is on the resource term To remove extra terms move the cursor to the undesired term and press the DELETE key TRIGGER TERMS This entry determines whether the last sequence term will OR or AND the resource terms together OCCURRENCES Occurrences of the last event in the sequence may be specified from 1 to 59999 occurrences RESTART One to four resource terms may be used in an
132. bled or selected to auto scale on period positive pulse negative pulse rising edge or falling edge Auto Scale scales the timebase to display the selected portion of the waveform When the timebase Auto Scale is disabled the timebase is not rescaled when the front panel AUTO SCALE key is pressed vertical and trigger may be rescaled depending on their Auto Scale settings Reference Reference places the trigger event plus delay at the Left Center or Right side of the graph depending on the selection 1f delay is zero a Left reference places the trigger event at the left side of the graph a Center reference places the trigger event at the center of the graph and a Right reference places the trigger event at the right side of the graph 3 28 HP 54201A D Front Panel Sampling Sampling is the real time digitizing rate used by the HP 54201A D to acquire the waveform in real time sampling mode The digitizing rate depends upon the time range selected and can only be changed indirectly by changing the time range time ranges from 5 us 10 50 ns have a digitizing rate of 200 megasamples second This field is not present in Repetitive sampling mode when the random repetitive sampling rate is 25 MHz 3 12 THE GRAPH DISPLAY The display is in the graph mode any time the SYSTEM STATUS or TRIG State HP 54201D only menus are turned off Refer to the example display shown in figure 3 23 Line 1 Line 2 Lines 3 5 Line 6
133. bmenu HP 54201D only CHAN Mn os ERA o TIME A ra e Fere CHE VERA The Graph Display Key Down Power Up Reset 54201A D Table of Contents SECTION 4 FRONT PANEL EXERCISES Introd eee ear ieee oT Tene E QUE i um Looking at Waveform Edges Rise Time Measurement Fall Time Measurement Measuring Frequency Period Cursor Measurements Expanding Graphs 7 02422 2 0 002 2 Expanding One Waveform Expanding Two Graphs to the Same Scale Connect Dots Looking at Pulses Positive Pulse Width Negative Pulse Width t gl Me _________ Waveform _________ EO C ERR E a Recovering from a Lost Front Panel Setup Troubleshooting Logic Measuring Worst Case Jitter Single Shot Capture Triggered Mode Auto Mode Swept Frequency Response SECTION 5 STATE TRIGGERING WITH THE 54201D introduction 4 State Trigger Menus State Trigger Inputs Stat
134. d controls the HP 54201A D display ON turns normal display on which has no effect if the display is already on the last HP 54201A D menu is restored OFF turns everything except line 1 and 2 of the display off resulting in faster operation when running since in this mode waveform data is not written to graph displays Accumulated displays are not generated with screen off This command cancels system command DEBug display Query returns the current screen status Command Syntax SCReen ON 1 OFF 10 J Example OUTPUT 707 SCREEN ON Query Syntax SCReen 7 Returned Format SCReen lt argument gt lt crl1f gt Example OUTPUT 707 SCREEN ENTER 707 Screen PRINT Screen UUU _ SHOW command query Command selects which graphs scale factors are shown in the scale line value must be 1 2 3 or 4 If higher than maximum graph currently displayed then value is rounded to that graph number with no error Query returns graph number shown on current scale factor line of display Command Syntax SHOW GRAPh 1 2 3 4 Example OUTPUT 707 SHOW GRAPH 4 Query Syntax SHOW Returned Format SHOW GRAPh lt NR1 gt lt cr1f gt Example OUTPUT 707 SHOW ENTER 707 Show PRINT Show 8 67 HP 54201A D Programming DISPLAY SUBSYSTEM STRing command Command displays the string starting at the current row and column specification If the column limit 63 is reached the text is wrap
135. down power up reset is executed but are forced to not protected status All waveform memories are erased on key down power up reset A complete description of key down power up reset is given at the end of this chapter Status 8 Memory 5 Required Frame BB TALK ONLY Setup Memories Protect Label Waveform Protect Label Store Mode Envelope Average No Data No Data Figure 3 11 STATUS Memory Submenu 3 15 HP 54201A D Front Panel 3 8 DISPLAY Menu The DISPLAY menu allows the user to define how the graph area is displayed The DISPLAY menu tree is shown in figure 3 12 An example DISPLAY menu is shown in figure 3 13 DISPLAY Graticule Type T lFrame Grid Number of TI 1 4 Reference Lines off Define 94299 Upper volts 01 45 Lower 1 1 Accumulate Mode Disabled Fast 1 STow Manual Data Pipe eres prion 1 off Connect off Accumulate Mode must be disabled before reference lines can be enabled or defined Reference lines must be off before accumulate mode can be enabled Figure 3 12 DISPLAY Menu Tree Graticule Type Selecting frame graticule type removes all grid lines from the interior of the graph area A grid graticule type puts an 8x10 grid in the graphics area Number of Graphs One two or four graphs can be sel
136. e 0 capabilities 188 of the S4zB1H I to determine if the transfer 118 complete Attempting to program the 128 S4281h D while making hardcopy dump will 134 errors 148 128 EHI 8 30 HP 54201A D Programming SYSTEM COMMANDS READy RDY query Query which returns an integer equivalent to the HP 54201A D ready register ready byte of the status word The ready register is dynamic and indicates the current status of the instrument The ready register is defined as follows Query Syntax READy RDY Returned Format READy NR1 crlf Example OUTPUT 707 READY ENTER 707 Ready PRINT Ready The Ready Register MASK READY BIT CONDITION WEIGHT Not used always O Cal High indicates that self calibration has completed execution uus 32 Test High indicates that the requested self test has completed execution 3 Data Data available High indicates that something is in the buffer waiting to be read Hard complete High indicates that the last byte of printer or plotter dump has been sent and received Acq Acquisition complete High indicates that 11 waveforms are acquired 1 2 Trig Triggered High indicates that the instrument is receiving triggers Can only be set while running Parse Parse complete High indicates that the last command has been completely parsed if stopped reflects status previou
137. e Ene bp RUE e 7 5 Local Capability 7 5 Remote to Local Mode Changes 7 5 Local Lockout 7 6 Addressing e 7 6 Talk Only Mode equ HP IB Turn On Default Conditions 7 7 Messages 7 7 Receiving the Data Message 7 8 Input Data Message Format 7 8 Program Order Considerations 7 8 Program Command Format 7 9 Sending the Data Message 7 10 Output Data Message Format 7 10 Learn 7 10 Receiving the Clear Message 7 10 Receiving the Trigger Message 7 10 Receiving the Remote Message 7 40 Receiving the Local Message es 7 11 Receiving the Local Lockout Message 7 11 Receiving the Clear Lockout Set Local Message 7 11 Receiving the Pass Control Message Sending the Require Service Message Sending the Status Byte Message The Status Word Sending the Status Bit Message 3 Receiving the Abort Message 2 2 222 2 2 002 22 vi Lu HP 54201A D Table of Contents SECTION 8 PROGRAMMING THE 54201A D eese n Ihm russes rasa sa muse erue ee nnne nn Command Structure Command Abbreviations Alpha and Numeric Arguments Notation Conventions and Definitions Syntax Diagrams
138. e Trigger Assignment Menu Trigger Mode Assignment State Mode Assignment Clock Assignments Multiplex Assignments 221 2 1 Threshold Assignments 2 5 44 0022 Label Assignments and Polarity State Trigger Sequence Menu Trigger Mode Assignment Resource Terms State Sequence Specification Using Qualified Mode for Armed Digital Delay Extra Bit and Missing Bit Modes The Faults Faulty Serial Data Transmission Data Transmission Dropout Catching the Glitch Quick Reference to State Trigger Menus x State Trigger Assignment Menu State Trigger Sequence Menu HP 54201A D Table of Contents SECTION 6 PERIPHERALS TD quae E TR P E pec Ud Setting up the 54201A D Graphics Printers Plott rs uo SECTION 7 REMOTE CONTROL Remote Operation Hewlett Packard Interface Bus 7 1 HP IB Compatibility 7 1 HP IB Status Display 7 1 Remote Mode e 7 5 Remote Capability e 7 5 Local to Remote Mode Changes e 7 5 tirer Eve Une T E
139. e WAVeform command addresses the waveform subsystem as the destination of the following commands The WAVeform query responds with the current wave source and the validity and preamble function settings for that source Command Syntax WAVeform Example OUTPUT 707 WAVEFORM Query Syntax WAVeform 2 Returned Format WAVeform lt 1 gt 1 SOURce lt source gt lt 1 gt VALid lt argument gt lt crl f gt FORMat argument cr lf TYPE lt argument gt lt cr1f gt POINts NR1 crlf COUNt NRI crlf XINCrement NR3 crlf XORigin lt NR3 gt lt cr1f gt XREFerence lt NR1 gt lt crl f gt YINCrement lt NR3 gt lt crl f gt YORigin NR3 cr1f YREFerence lt NR1 gt lt crl f gt COUPling lt argument gt lt cr1f gt IMPedance lt argument gt lt cr gt LABel lt 10 chars quoted gt lt crl gt Example 5 250 OUTPUT 707 WAVEFORM ENTER 707 USING K Wave PRINT USING 8 129 HP 54201A D Programming WAVEFORM SUBSYSTEM xs MM M M WAVeform Commands SOURce TYPE COUPT ing VALid COUNt XINCrement DATA XORigin IMPedance XREFerence FORMat YINCrement 1 YORigin POINts YREFerence PREamble Waveform Definitions Point Horizontal data points on waveform starting with point 1 at left side of graph Acquisition may contain from 51 to 1001 points T
140. e field State Trigger Assignment Menu Figure 3 16 and 3 17 Assignment functions assigns information about the pod inputs and how they will be used Trigger Mode This selection determines whether the instrument will trigger on the conditions specified in the analog trigger submenu Analog Only or will trigger on the conditions set up in the state trigger submenu State Only or whether the state conditions will first be found and then used to arm the analog trigger State Arms Analog This Trigger Mode field is also present in the State Trigger Sequence menu State Mode Four state modes are available Normal State patterns up to 27 channels wide may be defined as trigger qualification Up to four unique state patterns can be qualified on in a user defined sequence Qualified State sequence search does not begin until after the qualify clock has occurred The slave clock is defined as the qualify clock Missing Bit This mode predefines the last state in the sequence specification to detect a missing bit in a string of serial data and triggers the acquisition Extra Bit This mode predefines the last state in the sequence specification to detect an extra bit in a string of serial data and triggers the acquisition With Missing Bit and Extra Bit the J clock is used to define the reference time interval or cell for which a missing or extra bit will be checked The serial data is input as the L clock 3 21 HP 54201A D
141. e front panel AUTO SCALE key will not change any of parameters set on the CHAN menu The Auto Scale function for each channel may be enabled or disabled independently Store Mode Store mode determines how the acquired data is processed before the data is shown graph Either normal average or envelope mode may be chosen Normal Normal mode displays one voltage value for each time value of the present acquisition Average Average mode displays the average voltage value of the present acquisition and voltage values from previous acquisitions with each time value Either 4 16 64 or 256 averages may be selected Envelope Envelope mode displays only the minimum voltage for each time value and the maximum voltage for each time value Probe The probe attenuation factor 1 1 to 100 1 should be entered for each channel to match the probe that is connected to that channel This allows the HP 54201A D to correct all scale factors for the attenuation ratio of the probe When this is used all automatic measurements and cursor value readouts are corrected to reflect the attenuation factor When coupling and probe attenuation factors are changed on the CHAN menu these values are automatically changed on the TRIG menu to match unless externally triggered Coupling The input coupling for Channel 1 or Channel 2 may be selected as 1 ac 1 dc or 500 dc 3 26 Mou HP 54201A D Front Panel 3 11 TIME Menu The TIME menu a
142. e the same as selected for channel 1 However range and offset are in terms of the resultant sum or difference waveform For either ADD or SUBTract mode the possible range of the resultant waveform is twice that of the individual input ranges For SUBTract mode the resultant offset can only be zero since the offset applied to each input is the same For add mode the resultant offset is twice that applied to each input Query returns the current input configuration Command Syntax MODE NORMal 01 SuBtract 1 ADD 12 Example OUTPUT 707 ADD Query Syntax MODE Example OUTPUT 707 MODE ENTER 707 Mode PRINT Mode 8 55 HP 54201A D Programming CHANNEL SUBSYSTEM OFFSet command query Command sets channel offset Offset is 1 5 V for 40 mV to 790 mV channel range and 30 V 800 mV to 16 V channel range Query responds with the channel offset setting Command Syntax OFFSet NR3 Example OUTPUT 707 OFFSET 400E 3 Query Syntax OFFSet 2 Returned Format OFFSet NR3 cr1f Example OUTPUT 707 OFFSET ENTER 707 0ffset PRINT Offset PROBe command query e Command sets channel probe factor Must be 1 2 5 10 20 50 or 100 Query responds with channel probe factor Command Syntax PROBe lt NR1 gt Example OUTPUT 707 PROBE 10 Query Syntax PROBe Returned Format PROBe NR3 cr1f Example OUTPUT 707 PROBE ENTER 707 Probe PRINT Probe 8 56
143. eamble data required before loading waveform data into a memory 1858 18680 Set up scope to accept waveform and preamble data 1978 ASSIGH BFast TO TGT FO RMRT OFF 1888 OUTPUT 7OT HERDBER OFF ON 1898 OUTPUT Fears ACHUTREs TYPE NORMAL 1908 1918 Acquire data 1326 OUTPUT P s DIGITIZE CHANNEL 1936 1946 1 Set up waveform source 1938 OUTPUT WAVEFORM SOURCE CHRHMEL 1 FORMAT WORD 1 1970 1 Input waveform preamble ta controller 1988 DIM Pree lisad 1998 OUTFUT FOF WAVEFORM PREANBLE 28668 ENTER Ter USING K jPret 2918 2628 llInput waveform data to controller 2838 QUTPUT r 7 DRTR 4 ENTER TB USING i amp 2BH M rHeader Eetes Header 2868 Bytes 2882 2878 Words Bytes 2 2888 ALLOCATE INTEGER WavtWords gt 2838 ENTER 2188 2118 Output waveform preamble and data ta memory 3 2126 OUTPUT FO7s SOURCE MEM RT3 2138 OUTPUT USING PREAMBLE Pre 2148 OUTPUT Ta USING 7 DATA Bytes 2156 GUTPUT 21658 2176 1 Display memory 3 on graph 2 2156 OUTPUT T87T RECRHLL GRAFH 2 MEMORY 3 8 135 HP 54201A D Programming WAVEFORM SUBSYSTEM S OE FORMat command query Command sets the data transmission mode for waveform data points Data is transferred either as Signed 8 bit BYTE or 16 bit WORD the sign bit is always positive 0 May be
144. ected to be displayed In Channel Dual mode from the STATUS Configuration menu the graphs may be Channel 1 Channel 2 or Memory 0 through 3 and may be in any order The top graph is always graph 1 The graph labels are to the left of the displayed waveform any time the cursor values are not displayed In Channel 1 2 mode the graphs may be Channel 1 Channel 142 or any of the waveform memories In Channel 1 2 mode the graphs may be Channel 1 Channel 1 2 or any of the waveform memories Reference Lines This function displays upper and lower thresholds used in automatic measurements on each graph that contains wavetorm data When off the reference lines are removed When on the reference lines are displayed When in the define mode the reference lines are displayed and the reference threshold values are displayed to the left of each graph when the DISPLAY menu is selected If the STATUS Measurement menu is in the user defined mode the values may also be adjusted from this area The accumulate mode must be disabled before reference lines be enabled or defined 3 16 HP 54201A D Front Panel Status Acquired Frame __ TALK ONLY Graticule Type L Frame Reference Lines B OFF Humber of Graphs Accumulate lode M Connect Dots off 1 Filter Graph 851 Ceo 2 48 0 000 1 BIETEN Figure 3 13 Example DISPLAY Menu
145. ed as though the STOP command had been issued and the message Acquisition Complete is displayed in the status line Note This command does not have a finite number of arguments therefore the last argument cannot be punctuated with no argument is included with DiGitize and there is an active channel on at least one graph graphs are left alone are turned off or unexpanded This facilitates some special measurements such as delay between channel 1 and a reference waveform in memory If no argument is included with DlGitize and there is no active channel on any graph then the current graph sources determine what is acquired the default is made as follows If one graph is displayed channel 1 is assigned to graph 1 if two graphs are displayed channel 1 is assigned to graph 1 and channel 2 is assigned to graph 2 f four graphs are displayed channel 1 is assigned to graph 1 and channel 2 is assigned to graph 2 All other graphs are set to off Command Syntax DIGitize lt acquire spec gt lt acquire gt 0 1 acquire spec CHANnell 1 CHANnel2 2 J Example OUTPUT 707 DIGITIZE CHANNEL 2 8 20 HP 54201A D Programming SYSTEM COMMANDS er DSP command query Command places string up to 32 characters long in the message area of the HP 54201A D display Priority is higher than normal advisories lower than
146. emote Control Table 7 2 HP IB Message Reference Table HP IB APPLICABLE INSTRUMENT RESPONSE RELATED INTERFACE META COMMANDS FUNCTIONS MESSAGE AND CONTROL LINES Data Yes Most front panel menu DAB MLA and remote functions UNL Also all instrument EOS MTA settings may be read UNT via the HP IB OTA Trigger Yes Responds as if the GET DIGitize system command MLA were issued Clear Yes Responds by DCL DCi Terminating bus SDC communication Clearing serial poll bits Clearing input and out put buffers Clearing error msg and key queues Remote Yes Enabled to remote mode REN RLI when the REN bus control MLA line is true However it remains in local until it is addressed to listen the L first time Local Yes Returns from remote to GTL RL1 Tocal when it receives the MLA Local message or the LOCAL key is pressed Settings remain unchanged after the remote to local transition Local Yes When in remote and local LLO RL1 Lockout lockout is in effect the front panel is disabled Only the system controller return the instrument to local 7 3 HP 54201A D Remote Control Table 7 2 HP IB Message Reference Table Continued Menon APPLICABLE INSTRUMENT RESPONSE RELATED INTERFACE ESAE COMMANDS FUNCTIONS AND CONTROL LINES Clear Lockout Set Local Returns to local and local REN lockout is cleared
147. ent operation whether command are sent one per message or several per message HP 54201A D Programming 8 12 Program Code Parameters Program Code Parameters be of four types Strings Blocks A Y 0 Numeric Alpha Any collection of ASCII characters surrounded by quotation marks A block of data in formats as defined by IEEE Std 728 1982 This format is binary block with the format lt gt lt A gt lt length word gt lt DAB DAB gt The length word is a 16 bit binary integer representing the number of DABs DABs are the data bytes themselves lt gt and lt A gt are ASCII bytes This format is an ASCII representation of a binary number with the format lt gt lt Y gt lt DAB DAB gt bytes are ASCII This format is an ASCII representation of an octal number with the format ft O DAB DAB All bytes are ASCII This format is an ASCII representation of a hexadecimal number with the format lt gt lt H gt lt DAB DAB gt All bytes are ASCII Any integer format decimal NR2 format or exponential value format The character E or e is used to delimit the mantissa of exponential parameters Spaces are not allowed within the numeric paramter between the lt gt lt gt E or between digits Refer to figure 8 2 for syntax diagrams of NR1 NR2 and numeric representations Some commands require or allow
148. ents or decrements by pressing the FINE key shift NEXT or shift PREV A range may be also entered using the numeric key pad followed by the appropriate units factor key either Volt or mV Offset Offset is the dc voltage that is subtracted from the input signal When displayed on the HP 54201A D the offset voltage is the voltage at the vertical center of the graph Offset allows expanding signals about a voltage of interest for increased resolution Offset can be incremented or decremented by pressing the NEXT or PREV key Offset can be changed in fine increments or decrements by pressing the FINE key shift NEXT or shift PREV Offset may be also entered using the numeric key pad followed by the appropriate units factor key either Volt or mV Remember the input signal operating range without distortion is 1 channel range from vertical center screen Channel Range Offset Range Offset Resolution 40 mV to 790 1 5 V 1 800 mV to 16 V 30 V 20 HP 54201A D Front Panel Status Acquired Frame POHLA TALK ONLY 1 1 Auto Scale Offset v Store Mode i Probe Coupling Graph m ediv 2 58 V 5 08 8 888 1 BE n Figure 3 20 Example CHAN Menu Auto Scale When the Auto Scale function is enabled and the front panel AUTO SCALE key is pressed the HP 54201A D searches for and rescales the selected channel to display the signal within the graph If Auto Scale is disabled pressing th
149. er Clock JKL State Mode L T 1 g Pod 1 Pod B Label Pol Figure 5 9 Assignment Menu for Digital Delay Example 1 5 12 54201A D State Triggering Move the blinking cursor to the Define field and press the NEXT key to display the state trigger Sequence menu Change the number of occurrences to 500 The Sequence menu should now appear as shown in figure 5 10 The HP 54201D will now trigger after the 500th occurrence of a system clock after the index pulse Remember anystate is the same as master clock occurrences which in this example are rising transitions of the J clock which is connected to the disc drive phase lock loop clock Trigger Status No Trigger M ED TALK ONLY Define Trigger Mode In Sequence Qualify on Slave Clock then find E Occurrences af Trigger Teri then Trigger Acquisition Sequence Restart on Label Base gt Figure 5 10 Sequence Menu for Digital Delay Example 1 Even though specifying a digital delay in this manner may at first be somewhat awkward there are advantages to having it as a part of the state trigger In addition to qualifying on a slave clock and counting master clocks anystate you can also specify withiri the sequence to find defined states For example if the disc drive that you are testing has real time serial to parallel processing it might be advantageous to find a wo
150. eros on the data bus Trigger __ _ Status Mo Trigger Found TALK ONLY Define Trigger Mode In Sequence find Trigger Teri then then W then Count Figure 5 6 State Trigger Sequence Menu 5 9 HP 54201A D State Triggering Move the blinking cursor down to the Sequence Restart field A sequence restart on state is equivalent to not having a restart condition Cycle through all the possible restart conditions by pressing the NEXT key A sequence restart on any state means that for a sequence specification to generate a trigger each term in the specification must immediately follow the term before it without a break For example with the presently displayed setup state pattern b must be the very next state that is present on the next clock after the initial occurrence of a and state pattern c must be the very next state that is present on the next clock after the initial occurrence of b and so on until the full sequence specification is satisfied If the sequence restart term is no state state pattern b must be the next state after the initial occurrence of a but b doesn t necessarily have to occur on the next clock cycle it could occur several clock cycles later If restart condition is encountered the sequence search starts over beginning with the first sequence term Note When a restart condition is specified the sequence specification takes priority over the res
151. errors The null string clears the DSP message Query returns advisory string currently in status line Command Syntax DSP quoted string Example OUTPUT 707 DSP Set offset then press CONTINUE Query Syntax DSP 7 Returned Format DSP string cr f Example DIM Dsp 40 OUTPUT 707 DSP ENTER 707 Dsp PRINT Dsp _ E EOI command query Command sets EOI mode for data outputs If on then EOI is asserted with the last data byte sent Command does not affect response to EO on input data messages Query returns the current status of EOI Command Syntax EOI ON 1 OFF 0 D Example OUTPUT 707 EOI OFF Query Syntax EOI Returned Format EOI lt argument gt lt crl f gt Example OUTPUT 707 EOI ENTER 707 01 PRINT 15 NENNEN MN MA M MM ll ERASe command Command erases specifed graph If the graph contains a memory waveform the graph is turned off If the graph contains a channel waveform then the waveform display is erased and the acquisition count for that waveform is set to 0 no data acquired yet Command Syntax ERASe GRAPh 1 2 3 4 Example OUTPUT 707 ERASE GRAPH 1 8 21 HP 54201A D Programming SYSTEM COMMANDS M M M a ERRor query Query which responds with the error code for the first error condition since ERRor device clear RESet instrument power on or ROS lt mask spec If STRing i
152. ervice Execute Selftest 0 CPU Memory En Acquisition Trigger 2 Input Execute Service 0 Time Nuti 1 Ext Trigger 11 2 Ext Trigger Hysteresis 1 3 Hardware Service 54201D only Figure 3 3 SYSTEM Menu Tree 3 6 HP 54201A D Front Panel SYSTEM PERIPHERALS SUBMENU Figure 3 4 This menu sets up the HP 54201A D to communicate wilh other instruments controllers via HP IB controls the output of the rear panel BNC connector and selects beeper mode Acquired gt 10888__ TALK ONLY HP IB Address Mode Hardcopy Device is lt Must in LISTEN ONLY Made Rear Panel BNC RR Beeper is Firmware Revision 12547 Serial Number 55 1 1 Figure 3 4 SYSTEM Peripherals Submenu 3 7 HP 3 8 54201A D Front Panel Address Mode To use the HP 54201A D with a controller set the HP IB address mode to Addressable with the NEXT PREV key and select the desired address by using the numeric keypad To use with a printer or plotter set the address mode to Talk Only with the NEXT PREV key Hardcopy Device is To use the HP 54201A D with a printer or plotter set the HP IB address mode to Talk Only with the NEXT key set hardcopy device to Printer or Plotter as desired and then set the address on the printer or plotter to Listen Only Press the HARDCOPY key SHIFT TTL to output the HP 54201A D screen content
153. escriptive words or characters that are used to symbolize program code parameter an HP IB command For example A represents the ASCII character A um is defined as For example lt A gt lt B gt indicates that lt A gt can be replaced by lt B gt in any statement containing lt A gt When several items are enclosed by braces one and only one of these elements must be selected Indicates a choice of exactly one element from a list For example lt A gt lt B gt indicates lt A gt or lt B gt but not both An ellipsis trailing dots is used to indicate that the preceding element may be repeated one or more times 1 Square brackets indicate that the enclosed items are optional parameters IXIN _ exclamation mark used in this form indicates a parameter may be repeated from X times up to N times The following definitions are used d x single ASCH numeric character 0 9 n single ASCII non zero numeric character 1 9 LF linefeed decimal 10 CR ASCII carriage return decimal 13 SP ASCII space decimal 32 8 6 SYNTAX DIAGRAMS At the beginning of the system command section and each subsystem command section are syntax diagrams showing the proper syntax for each command characters contained in circle or oblong are literals and must be entered exactly as shown Words and phrases contained in rectangles are names of items used with the com
154. ets inverse video display on or off After INVerse ON is received all subsequent text is displayed in inverse until INVerse OFF is received Command Syntax INVerse OFF 0 J 1 J Example OUTPUT 707 INVERSE OFF 8 65 HP 54201A D Programming DISPLAY SUBSYSTEM LINE command query Command displays the string starting at the current row and column specification If the column limit 63 is reached the text is wrapped to the next line irrespective of word boundaries At the end of the string the remainder of the current row is set to and row is initialized to the next row and column is set to 0 If column limit is reached on row 4 the display is rolled up and the new line 4 is set to before the write operation continues Refer to the STRing command for similar application Command Syntax LINE lt any quoted string gt Example OUTPUT 707 LINE Enter text on this line REFerence command query Cammand sets the reference lines display mode In define mode when display menu is on the graph levels are displayed by the graphs Query returns the reference lines mode Command Syntax REFerence OFF 01 ON 1 DEFine 2 J Example OUTPUT 707 REFERENCE OFF Query Syntax REFerence Returned Format REFerence lt argument gt lt cr f gt Example OUTPUT 707 REFERENCE ENTER 707 Ref PRINT Ref 8 66 HP 54201A D Programming DISPLAY SUBSYSTEM SCReen command query Comman
155. ets the time range and time per sample for memory waveform only is equal to time range 1000 Query returns the x increment time per sample for any addressed wavetorm Command Syntax XINCrement lt NR3 gt Example OUTPUT 707 XINCREMENT 200E 6 Query Syntax XINCrement Returned Format XINCrement NR3 cr1f Example DIM Xinc 30 OUTPUT 707 XINCREMENT ENTER 707 Xinc PRINT Xinc na XORigin command query Command sets the time of the first data point for memory waveforms only Query returns the time of the first data point x origin of any selected waveform Command Syntax XORigin lt NR3 gt Example OUTPUT 707 XORIGIN 0 0 Query Syntax XORigin Returned Format XORigin lt NR3 gt lt cr f gt Example OUTPUT 707 XORIGIN ENTER 707 Xor PRINT Xor 8 140 HP 54201A D Programming WAVEFORM SUBSYSTEM XREFerence command query Command sets the point at which time x origin exists for memory waveforms only Must be 1 Query returns the point number at which x origin exists for any selected waveform Always 1 Command Syntax XREFerence 1 Example OUTPUT 707 XREFERENCE 1 Query Syntax REFerence Returned Format XREFerence lt NR1 gt lt crl1f gt Example OUTPUT 707 XREFERENCE ENTER 707 Xref PRINT Xref YINCrement command query Command sets the volts per q level and y axis range for the memory waveform only This value is interpreted with the current format selecti
156. extra bit of the output signal The setup for this measurement was identical to that of the dropout example except that the state mode was selected as extra bit rather than missing bit HP 54201A D State Triggering Channel 1 Status Acquisition Stopped TALK ONLY Range 2 0 V Auto Scale Enabied 1 Offset 1 000 V Store Mode Normal 1 Coupling 10 1 1 Graph 2 1 1 50 V div 2 50 V 1 00 us div 5 000 us l Chan 12 AD IN ECL 2 Chan 27 AD OUT TTL h 4 Figure 5 15 Missing Bit Signal Dropout Detection Trigger Status Trigger Found TALK ONLY Define Trigger Made Reference Cell Serial Data I Clock L Clock State Mode CME ME Pad 2 Pad 1 Pod H vus 8 Label Fol Figure 5 16 State Trigger Assignment Menu 5 17 54201A D State Triggering Trigger EE Status Trigger Found TALK ONLY Define Trigger Mode State Onl In Sequence find ceurrences of a Missing Bit then Trigger Requisition Sequence Restart on state Figure 5 17 State Trigger Sequence Menu Channel 13 Acquisition Stopped TALK ONLY Range 2 0 V Auto Scale Enabled 1 Offset 1 000 V Store Mode Normal 1 Coupling de 10 1 Graph 2 500 mV div 1 00 1 00 gs div 5 000 us
157. fault modes SEQuence lt crif gt FIND sequence find list gt lt crlf gt COUNt lt NR1 gt lt cr1f gt OF lt sequence trigger list crlf TERMs lt argument gt lt cr f gt RESTart lt sequence restart list crlf clock specification For normal mode multiplexing off CLOCk argument argument argument cr f gt For normal mode multiplexing on or for qualified mode MASTer lt argument gt lt argument gt lt argument gt lt crl f gt SLAVe lt argument gt lt argument gt lt argument gt lt cr f gt For missing or extra bit modes DATA lt argument gt lt cr1f gt REFerence lt argument gt lt cr1f gt 8 95 HP 54201A D Programming STATE SUBSYSTEM STATe cont Note The following label commands apply to all defined labels When used individually they refer to the currently addressed label lt label specification LABel lt 5 chars quoted crlf POLarity argument cr f ALLocate lt NR1 gt lt NR1 gt lt NR1 gt lt cr f gt BASE argument crlf PATtern A pattern expression gt lt cr f gt PATtern B pattern expression crlf PATtern C pattern expression cr lf PATtern D pattern expression crlf normal and qualified modes only pattern expression fH hexadecimal expression decimal expression 0 lt octal expression lt binary expression 01
158. g HP 54201A D to resume running This differs from the RUN command in that averaging or enveloping continue with the data already obtained Command Syntax RESUMe Example OUTPUT 707 RESUME REVision query Query which returns the revision date of HP 54201A D firmware Query Syntax REVision 2 Returned Format REVision lt date code gt lt cr1f gt date code NRI YYWW where is years since 1960 and WW is week of that year Example OUTPUT 707 REVISION ENTER 707 Rev PRINT Rev RUN command Command causing HP 54201 0 to start running Same as pressing the HP 54201A D front panel RUN key Waveforms are initialized to count of O no data and when terminal count is satisfied the ACQ bit is set in the ready byte see READy command Differs from the DIGitize command in that acquisition is not halted when terminal count is satisfied RUN does not disturb graph source selection or expansion so is very useful for specialized measurements Command Syntax RUN Example OUTPUT 707 RUN 8 38 Se HP 54201A D Programming SYSTEM COMMANDS SAVE command Command saves the waveform or setup in the specified memory the memory is protected an error is generated and SAVE is not executed Protection can be cleared via the RESet command but cannot be set via HP IB Refer to RECall command to recall waveforms and setups Command Syntax SAVE GRAPh lt graph gt MEMory lt memory gt SETup
159. gger slope Trigger source Trigger subsystem Triggered mode IST vum TTL Channel TTL Trigger TTL key TVOLtU sexi d ovario TYPE Acquire TYPE Waveform U UNITS idi e rere dei Units keys UPPel V VALid Measure 8 83 Waveform VALUES key VALues derat win en ds HP 54201A D Index mnt 8 129 Waveform definitions Waveform edges Waveform storage Waveform subsystem Width WINDow X ves etae rhe e rai vl da e afa XINCrement XORigin XREFerence Y 8 141 YORIG Sees repe Potete iE Eon ga 8 142 YREFeren C caste e exeo 8 142 1 5 6 blank 15 Tipi nm DIVISION OF 3125661 CANADA INC 21 MARKET ST N corner Market amp William 60 SMITHS FALLS ONT 418 _ TELEPHONE 619 209 5195 FAX 813 OPERATING AND PROGRAMMING MANUAL 54201A D DIGITIZING OSCILLOSCOPE
160. gt 2 the waveform is searched for the second occurrence of the specified voltage on a negative slope The nearest point preceding this interval is returned Note If the waveform is type envelope and user mode is Selected for measurements the user definition of is used to select which waveform to measure Query Syntax PVOLt lt voltage gt lt slope amp occurrence gt Returned Format PVOLt lt NR1 gt lt cr1f gt Example DIM Pvolt 25 OUTPUT 707 PVOLT 200E 3 3 ENTER 707 Pvolt PRINT Pvolt ae TVOLt query When time of voltage is requested the waveform is searched from the first displayed point until an interval is found that contains the requested voltage Then a linear interpolation is done to estimate the time the voltage was traversed The sign of slope amp occurrence selects rising or falling edge The magnitude of this parameter selects the occurrence count For example if slope amp occurrence 2 the waveform is searched for the second occurrence of the specified voltage on a negative slope Note if the waveform is type envelope and user mode is selected for measurements the user definition of is used to select which waveform to measure Query Syntax TVOLt lt voltage gt lt slope amp occurrence gt Returned Format TVOLt NR3 crlf Example DIM Tvolt 25 OUTPUT 707 TVOLT 5 5 2 2 EN
161. has been set to VOLTs or PERCent The upper limit is preset for ECL and TTL If UNITs has been set to PERCent the allowable upper limit is from 55 to 99 Query returns the value of the upper measurement threshold Command Syntax UPPer upper limit Example OUTPUT 707 UPPER 85 assuming UNITs has been set to PERCent Query Syntax UPPer 2 Returned Format UPPer NRI 1 if percent lt NR3 gt if volts I lt NR2 gt lt crif gt if TTL or ECL Example OUTPUT 707 UPPER ENTER 707 Upper PRINT Upper 8 74 HP 54201A D Programming GRAPH SUBSYSTEM query Query which returns the value of the middle measurement threshold Query Syntax MIDdle Returned Format MIDdle lt 1 gt 1 if percent lt NR3 gt 1 if volts lt NR2 gt lt crif gt if TTL or ECL Example OUTPUT 707 MIDDLE ENTER 707 Middle PRINT Middle LOWer command query Command sets lower measurement threshold if UNITs has been set to VOLTs or PERCent The lower limit is preset for ECL and TTL If UNITs has been set to PERCent the allowable lower limit is from 1 to 45 Query returns the value of the lower measurement threshold Command Syntax LOWer lt lower limit gt Example OUTPUT 707 LOWER 25 assuming UNITs has been set to PERCent Query Syntax LOWer Returned Format LOWer NRI 1 if percent lt NR3 gt 1 if volts NR2 lt cr1f gt if TTL or ECL Example
162. he number of points taken is set by POINts command Q level Quantization level vertical position of data point in terms of vertical resolution Number of q levels defined by mode Normal store mode with data filter off 64 q levels 6 bit resolution Normal store mode with data filter on 128 q levels 7 bit resolution Average 4 store mode 128 q levels 7 bit resolution Average 16 store mode 256 q levels 8 bit resolution Average 64 store mode 512 q levels 9 bit resolution Average 256 store mode 1024 q levels 10 bit resolution XINCrement Time increment between data points XORigin Time of first data point XREFerence Point of X origin always 1 YINCrement Voltage increment per q level YORigin Voltage at vertical center screen YREFerence Value used to normalize q levels in software prior to conversion to volts If FORMat command set to BYTE YREFerence is 62 if set to WORD YREFerence is 15872 Conversion Formulas Volts at Q level YREF YOR level Volts YOR YREF Time at Point Point XREF XINC Point Time XREF 8 130 HP 54201A D Programming WAVEFORM SUBSYSTEM WAVe form i Us SOURce T 099 Gens 9 dato block gt re date block
163. igger term which is the last term in a possible of 4 sequence terms The sequence specification should presently be setup to trigger the acquisition after finding one occurrence of any state States are checked on the edge of the clock specified in the Assignment menu or when multiplexing the master clock in this example a trigger will be generated on each positive transition of the J clock input Press the NEXT key one time to display a The oscilloscope will now trigger whenever state pattern a is found As we have defined resource term a this will occur each time the DAC is written to with all zeros on the data bus The DAC is written to any time 11001 is present on the decoding circuitry input when the J clock goes high Press the NEXT key again to display b The oscilloscope will now trigger each time all ones are written to the DAC as defined by resource term b Press the NEXT key again to display c The oscilloscope will now trigger any time the DAC is written to regardless of what is on the DATA bus as defined by term c Press the NEXT key again to display d The oscilloscope will now trigger whenever 10000000 is written to the DAC as defined by term d Press the NEXT key again to display a This is defined as anything other than term It is not the complement of a With this specification the oscilloscope will trigger anytime other than when the DAC is written to with all zeros Continue pressing the
164. imary function of a circuit may be analog nearly all state of the art designs include some kind of digital control State triggering on the digital contro can be accomplished using the 27 parallel bits of state trigger while the analog input of the oscilloscope can probe analog or digital signals to be characterized The 27 bits are for state triggering only and cannot be viewed on the HP 54201D display Note This section discusses the various modes and triggering techniques in a tutorial manner therefore it is advantageous to operate the HP 54201D while reading this section of the manual 5 2 STATE TRIGGER MENUS Two selections the Assignment menu and the Sequence menu are available in the State Trigger menus Figure 5 1 is a menu tree showing the selections available from the State Trigger menus At the end of this section is a quick reference to the State Trigger menus TRIGger State Trigger Analog Only Mode State Only State Arms 109 Define Assignment State Mode Norma ified Missing Bit Extra Bit Multiplexing Normal Mode Only Clock Assignments Pod Thresholds Labels Polarity Bit Assignment sequence Sequence Terms Restart Terms Number Base Resource Terms Figure 5 1 State Trigger Menu Tree 5 1 54201A D State Triggering 5 3 STATE TRIGGER INPUTS The HP 542010 uses three HP Model 10271A ten channel probes to input 27 channels of state trigger and three clocks These
165. in a format acceptable to an HPGL plotter as soon as the HP 542014 0 is next addressed to talk Command Syntax PLOT Example CLEAR OUTPUT For PLOT SEHD T UHT UNL SEHD T LISTEH 5 SEND Fi TALK 7 SEND 7 DATA Clear interface buffers Starts plotter buffering Clears bus set ATH line at controller true 3 plotter at address 5 to listen 54201 to talk made Sets ATH line at controller to false so data can be transferred Wait secands f 288 WAIT 5 Tor tra er to finish Hotes If programming use the HU capabilities of the S4281h amp 4I to determine if the transfer is complete Attenpting to program the S4281A D while making a hardcopy dump will CAUSE errors PRINt command Command sets hardcopy device to printer and does hardcopy dump of HP 54201A D display in a format acceptable to a printer compatible with the HP RASTER GRAPHICS STANDARD as soon as the HP 54201A D is next addressed to talk Command Syntax PRINt Example 18 CLEAR Far Clear interface buffers OUTPUT TBT PRIHT Starts print buffering 38 SENI F UHT UNL Clears bus set line at controller true 44 F LISTEN 1 Tells printer at address 1 to listen SEHD FITALE 7 Bets BAZALA CD to talk mode SEND 7y DATA Sets ATH line at controller ta false TO data can be transferred 36 WAIT 25 Hait 25 seconds for tra er to finish Hote If programming use th
166. ional Bureau of Standards to the extent allowed by the Bureau s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Hewlett Packard product is warranted against defects in material and workmanship for a period of one year from date of shipment During the warranty period Hewlett Packard Company will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility designated by HP However warranty service for products installed by HP and certain other products designated by HP will be performed at Buyer s facility at no charge within the HP service travel area Outside HP Service travel areas warranty service will be performed at Buyer s facility only upon HP s prior agreement and Buyer shall pay HP s round trip travel expenses For products returned to HP for warranty service Buyer shall prepay shipping charges to HP and HP shall pay shipping charges to return the product to Buyer However Buyer shall pay all shipping charges duties and taxes for products returned to HP from another country LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfacing unauthorized modification misuse operation outside of the environmental specifications for the product or
167. is For normal store mode the count parameter is optional if not sent it defaults to 1 Valid range is from 1 to 10 000 For average mode the count must be exactly 4 16 64 or 256 For envelope count can be 10 to 10 000 The STORe function may also be programmed using the ACQuire subsystem TYPE and COUNt commands Query responds with the current store mode for the addressed channel Command Syntax STORe lt type gt lt count gt lt type gt NORMal 1 AVErage 2 ENVelope 3 lt count gt NRI Query Syntax STORe 3 Returned Format STORe lt argument gt lt NR1 gt lt cr f gt Example OUTPUT 707 STORE ENTER 707 Store PRINT Store 8 58 HP 54201A D Programming DISPLAY SUBSYSTEM DiSPlay command query The display subsystem provides access to HP 54201A D functions which control how waveforms are presented on the CRT contains commands to select whether the cursor values display is Also a group of commands is provided that allow users to write text messages to screen The text display is available when the text menu is on and allows up to 4 lines of text to be displayed in the user definable text area Five lines of text can be held in memory the fifth line is not displayed unless the display is rolled up or down Text is volatile it is set to at power on However once written the user may display it with TEXT or display the previous menu by sending TEXT O
168. its each that may be qualified on in a user defined sequence The last state can be an ORed or ANDed combination of up to four state patterns and can be specified to occur from one to 59 999 times before satisfying a complete state sequence Up to four ORed sequence terms allow restarting the complete sequence if the restart term occurs before the proper sequence is completed Upon satisfying a sequence specification the HP 54201D can be defined to trigger immediately or trigger on the next valid analog trigger Qualified Mode The qualified mode enables the user to perform digital delay triggering which is very useful for triggering on a serial bit string State sequence search does not begin until after the qualify clock has occurred The slave clock is defined as the qualify clock One application involves triggering on the nth sector pulse on a disc after an index pulse by qualifying on the index pulse and define the sequence to trigger after the nth occurrence of any state Missing Bit Mode This mode predefines the last state in the sequence specification to detect a missing bit in a string of serial data and triggers the acquisition A reference clock provided by the user is compared with the input serial data There must be one data bit transition in the serial data within each reference clock cycle If the data bit is missing the HP 54201D detects it and triggers the acquisition on the next reference clock edge When in this mode the last sta
169. k BIT MASK WEIGHT STATUS BIT CONDITION 128 MSG High indicates that a message was displayed on the Status line of the display MSG query is used to determine the message code z 64 RQS Not used always 0 ERR Error High indicates an error occurred An ERRor query is used to determine error code RDY Ready High indicates the instrument is ready This is based on the ready mask A RDY query is used to determine condition m LCL Local switch or power cycle High indicates that the instrument has been switched to local from the front panel or that the power was cycled off then on again FPS Front panel service request High indicates a front pane key has been pressed KEY query is used to determine the key code 2 PWR Not used always 0 Not used always 0 Notes 1 To set the RQS bit and SRQ bus control line true the condition must be enabled in the RQS mask If no condition is enabled the HP 54201A D can not set the SRQ bus control line nor the RQS bit true However bits 2 5 and 7 of the status byte are set to indicate which conditions have occurred HP 54201A D Programming SYSTEM COMMANDS E RESet RST command The HP 54201A D has three distinct levels of reset capabilities two are HP IB bus commands and one is a HP 54201A D system command 1 IFC HP IB bus
170. key and the alphabetic characters Labels are deleted by pressing the DELETE key shift INSERT when the blinking cursor is on the line of the label to be deleted Note When operating in the Missing Bit or Extra Bit state modes only one label field may be assigned Notice the Pol polarity field to the right of the Label field By using the NEXT or PREV key may be selected to indicate whether a voltage above the threshold voltage is to be defined as a 1 or a 0 A in this field indicates voltages above the threshold are 1 and voltages below the threshold are 0 Choosing defines the opposite polarity The asterisk field to the right of the Pol field assigns which input probes will be active for each label field An designates that input bit as active A designates that input bit as inactive or ignored and is referred to as a masked bit To assign status to an input bit press the NEXT or PREV key while in the asterisk field Note The bits assigned to labels need not be physically adjacent For example bit 2 in Pod 0 could be combined with bit 5 in Pod 2 for assignment of a single label consisting of the two probe channels 5 4 FROM CHIP ENABLE MICRO PROC 0 4 DECODING CIRCUITRY LOW WRITE HP 54201A D State Triggering To clarify what we have covered so far let s consider a specific example Assume that you want to trigger when a certain word is written to a DAC Assume also that this is
171. key is also disabled The HP 4201A D can be addressed to listen or talk while in remote mode When addressed to listen the instrument automatically stops talking and responds to DATA messages When addressed to talk the instrument stops listening and sends either a Data message if available or the Status Byte Whether addressed or not the HP 54201A D responds to the Local Local Lockout Clear Lockout Set Local Trigger Status bit and Abort Messages and in addition the instrument may issue the Require Service message 7 6 Local to remote Mode Changes The 54201A D switches to remote upon receipt of the Remote message The Remote message has two parts Remote Enable REN bus control line true Device listen address MLA MY LISTEN ADDRESS received once while REN true All instrument settings remain unchanged with the local to remote transition However the remote to local transition does disable the front panel with the exceptions mentioned above The HP IB status display will show REM to indicate remote mode If the instrument is set to talk only mode the local to remote transition 16 inhibited 7 7 LOCAL MODE 7 8 Local Capability local the HP 54201A D front panel controls are operational Although it will not respond to input Data messages in local mode if addressed to talk the instrument can send Data messages and the Status Byte Whether addressed or not the instrument responds to the Remote Local L
172. lave clock is defined as the qualify clock All other operation is identical to the Normal mode Missing Bit This mode predefines the last state in the sequence to detect a missing bit in a string of serial data and triggers the acquisition Extra Bit This mode predefines the last state in the sequence specification to detect an extra bit in a string of serial data and triggers the acquisition With Missing Bit and Extra Bit modes the J clock is used to define the reference time interval or cell for which a missing or extra bit will be checked The serial data is input as the L clock Status Mo Trigger Found TALK ONLY Trigger Made Pod 1 Pad RUNS 4B 2 SELILA Pad Z Multiplexing EBENE a Label Pol EX Figure 5 2 State Trigger Defauit Menu 5 7 Clock Assignments The HP 54201D state trigger must recognize data input patterns on the same clock edge as the system under test Three ORed clocks are available in the state trigger Assignment menu The default clock assignment specifies to monitor input data on the positive edge of the J clock Other clock specifications may be made by moving the cursor to the ORed clock field on the Assignment menu and using the NEXT or PREV key to select different clocks and edges HP 54201A D State Triggering 5 8 Multiplex Assignment Some digital systems may use multiplexing in which certain signal lines are used for different i
173. lay measurements may be specified as lower upper or middle threshold Delay measurements may specify either rising or falling edge Status Status Acquired Frame Ba467__ TALK ONLY Node ETT Threshal aph 1 Graph 2 Graph 3 Graph 4 if C Volts JMC TIL ECL 1 4 S H 1 17 S X cod v 1 49 V 1 35 V Lower 2 ABO V 1 48 V Definitions Edge 1 12 MUST Cross Both Upper and Lower Freg 1 Periad First t Middle to Next Like Edge aT First f to Next 1 Upper aT First J to Next 1 Lower First f Lower to Upper First 1 Upper to Lower Width Period aT First to First 100 x 7 Using Histogram Absolute Maximum Voltage Absolute Minimum Voltage Root Mean Square Voltage Over 1 Period Feriad Midth Width Rise Fall Duty Delay V ampl M max V min V rms wu m ou m w m u m Figure 3 10 STATUS Measurement User Defined Mode Submenu HP 54201A D Front Panel STATUS MEMORY SUBMENU Figure 3 11 This submenu provides a display to label instrument setup memories and waveform storage memories and allows these memories to be protected from being inadvertently overwritten The waveform memories show the storage mode the instrument was in when the dala was put into memory normal average envelope or no data No data indicates the memory is empty setup and waveform memories are saved non volatile on power down All setup memories saved when a key
174. llows the user to define all timebase related parameters The TIME Menu tree is shown in figure 3 21 An example TIME menu is shown in figure 3 22 TIMEbase Mode Auto Trig d Single Range xxx xs Real Time Delay Xs Auto Scale Disabled Period Pulse Pulse Rise Fall Reference Left _ Center Figure 3 21 TIME Menu Tree Lac Timghase Status Acquired Frame BABIT Mode Auto Scale Range EE Reference E Sampling 8 288 MHz TALK ONLY doe zl Delay Graph 2 53 V nszdiv 1 ET Figure 3 22 Example TIME Menu 3 27 HP 54201A D Front Panel Mode Auto Triggered or Single timebase modes may be selected Auto Auto mode waits for a specified length of time determined by the time range for a trigger If a trigger does not occur within that time the contents of the acquisition memory are displayed with no trigger correlation Trig d Triggered mode waits until a trigger is received before the graph is updated There is no time limit in triggered mode if a trigger does not occur the screen is not updated The status line of the display will advise Waiting for Trigger Single Single mode clears the graph and displays the acquisition when a single trigger is received A new acquisition is not made until the instrument is manually reset by pressing the RUN STOP key When the trigger has occurred the
175. lt count gt lt xincrement gt lt xorigin gt lt xreference gt lt yincrement gt lt yorigin gt lt yreference gt coupling impedance lt label gt lt crl f gt Example OUTPUT 707 USING K PREAMBLE Pre 8 138 HP 54201A D Programming WAVEFORM SUBSYSTEM TYPE command query Command sets the data type for memory waveforms Query returns the data type of the selected waveform Command Syntax TYPE NORMal 111 AVErage 2 3 ENVelope Example OUTPUT 707 TYPE NORMAL Query Sytnax TYPE Returned Format argument cr f Example OUTPUT 707 TYPE ENTER 707 Type PRINT Type A M a M M VALid command query This command has no effect but the parameter must be in range 0 1 or 3 Query returns validity of data for the addressed waveform or graph To be valid count must be non zero and equal to or greater than the terminal count specified in ACQuire or CHANnel subsystems WAVeform TYPE must be 1 2 or 3 Command Syntax VALid G00D data 1 NO data 0 CLIPped 3 lt 1 gt Example OUTPUT 707 VALID 0000 Query Syntax VALid 2 Returned Format VALid GOOD data 1 NO data 01 CLIPped 3 lt crif gt Example OUTPUT 707 VALID ENTER 707 Valid PRINT Valid 8 139 54201 Programming WAVEFORM SUBSYSTEM L XiNCrement command query Command s
176. ly be made from the STATUS Configuration menu When 1 2 ar 1 2 is selected Channel 1 2 or Channel 1 2 replaces Channel 2 on the graphs The waveform math occurs as a software function after the two input signals have been acquired therefore these modes do not provide the full benefit of common mode rejection as a true differential system When either Channel 1 2 or Channel 1 2 is selected Channel 1 2 or 1 2 coupling coupling impedance probe attenuation and Auto Scale mode are set to be the same as Channel 1 The input range for Channel 1 2 or 1 2 is set double that of Channel 1 because the possible range of the resultant waveform is twice that of the individual ranges For Channel 1 2 mode the offset is set to zero since the offset applied to each input is the same For Channel 1 2 mode the offset is set double that of Channel 1 Channel Labels Each input channel may be labeled to provide a signal recognition aid These labels are shown in the graph labeling area when waveform graphics are displayed 3 12 HP 54201A D Front Panel STATUS MEASUREMENT SUBMENU This submenu specifies the thresholds used in making automatic measurements and for the edge find cursor operations Standard predefined threshold definitions may be selecled or user defined thresholds be specified in percentages voltages or voltages preset for TTL or ECL logic levels Standard Figure 3 9 in standard measurement mode all four graphs are set to 1
177. m To remove extra terms move the cursor to the undesired term and press the DELETE key Trigger Terms This entry determines whether the last sequence term will OR or AND the resource terms together Occurrences Occurrences of the last event in the sequence may be specified from 1 to 59999 occurrences Restart One to four resource terms may be used in an ORed condition for a sequence restart condition The sequence restart selection field appears when a resource term is inserted into the sequence 3 24 HP 54201A D Front Panel 3 10 CHAN Menu The CHAN menu provides selections to configure input channel parameters The CHAN Menu tree is shown in figure 3 19 An example CHAN menu is shown in figure 3 20 SL Range xxx V 2 Offset V Autoscal e y Enab ed Disabled Store Mode Norma 1 Average 4 64 256 Probe 1 2 5 10 1 20 50 100 Coupli IM Q 50 Q Figure 3 19 CHAN Menu Tree Channel Channel 1 or channel 2 may be assigned to the menu by moving the blinking cursor to the channel selection field and pressing the NEXT or PREV key Range Range sets the full scale voltage range shown on a graph for the selected channel This range is from 40 mV to 16 V full scale calibrated with two digit resolution Range can be incremented or decremented by pressing the NEXT or PREV key The range can be changed in fine increm
178. mal store mode the count parameter should be 1 For average mode the count should be exactly 4 16 64 or 256 For envelope count can be 1 to 10 000 If count is set to 0 the waveform will be considered invalid Query returns the count factor for the addressed waveform 0 is returned for invalid waveforms Command Syntax COUNt NRI Example OUTPUT 707 COUNT 16 Query Syntax COUNt 2 Returned Format COUNt NRI cr f Example OUTPUT 707 COUNT ENTER 707 Count PRINT Count 8 134 HP 54201A D Programming WAVEFORM SUBSYSTEM DATA command query HP 54201A D accepts a waveform data block if the waveform addressed is memory or a graph displaying memory Block length must match the defined store mode format and points settings These parameters are set up by the PREamble command Query returns the addressed waveforms data points if it is a valid waveform If running and the waveform is being acquired transmission occurs after the specified count has been reached Invalid waveforms are sent as all O s Command Syntax DATA lt Block type gt Query Syntax DATA Returned Format DATA Abb lt binary wave data gt where bb is a word binary integer giving the number of data bytes in binary wave data Wave data is sent as either bytes or words based upon the current format specification The following example shows both the command and query form of DATA and the steps required to enter pr
179. mand and are described in the accompanying text of each command The syntax diagrams show only the alpha argument for each command Refer to the command text for numeric arguments Each line can only be entered from one direction as indicated by the arrow on the entry line combination of commands and arguments that can be generated by following the lines in the proper direction is syntactically correct An argument is optional if there is a path around it Alpha arguments must be separated with a space numeric arguments and queries do not require a space 8 6 HP 54201A D Programming 8 7 PROGRAMMING AIDS The system DEBug command helps those who are unfamiliar with the command syntax to find programming errors and to understand the formats used to transmit data from the instrument to the controller When DEBug ON is issued each data message is shown on the HP 54201A D display just as it is received or transmitted over the HP IB The data messages appear within the lt gt symbols including imbedded carriage returns CR and line feeds LF Thus spelling and syntax errors can be quickly located and corrected by stepping through a program If an error occurs the error is highlighted with an inverse video cursor on the HP 54201A D display An error message is then displayed followed by message text on the status line of the HP 54201A D to indicate the nature of the error The system HELP command returns the entire command set of
180. meter has at least two forms a short form and a long farm although in some cases these are identical The longform throughout this manual is shown with leading upper case letters and trailing lower case letters The shortform is only the upper case letters The short form is obtained by truncating the longform using the following rule If the longform has more than 4 characters then if the 4th character is a vowel or the same as the 3rd character then truncate to 3 characters else truncate to 4 characters Example LONGFORM abbreviates to LONG and is shown as LONGform REFERENCE abbreviates to REF and is shown as REFerence STATE abbreviates to STAT and is shown as STATe In the case where two or more short forms would be identical all but one is changed slightly to differentiate between the commands For example RESET is abbreviated to RES RESUME is abbreviated to RESUM and RESULTS is abbreviated to RESUL In the command descriptions that follow each command is given in both long and short forms Some commands also have industry standard forms such as RQS for REQUEST and RDY for READY These are also valid forms in the HP 54201A D instruction set The commands may be executed using either long or short form When a query is executed and the HEADer command is set ON the answer returned to the controller will be returned in the long form format if the LONGform command has been set ON and will be returned in short form format if the LONGfo
181. mple DIM Clock 50 OUTPUT 707 CLOCK ENTER 707 Clock PRINT Clock 8 103 54201A D Programming STATE SUBSYSTEM __ MASTer command query Command sets the clock polarities for the master clock used in normal mode with multiplexing on or in qualified mode Query returns the master clock settings used in normal mode with multiplexing off and qualified modes Command Syntax MASTer J clock 5 gt lt clock spec gt lt L clock spec lt any clock spec gt NEGative 0 POSitive 1 BOTH 2 DISabled 3 mr Example OUTPUT 707 MASTER NEGATIVE NEGATIVE NEGATIVE Query Syntax MASTer Returned Format MASTer J clock spec gt lt K clock spec gt lt L clock spec crlf Example DIM Master 50 OUTPUT 707 MASTER ENTER 707 Master PRINT Master M M M M SLAVe command query M Command sets the clock polarities for the slave clock used in normal multiplex mode or qualified mode Query returns the slave clock settings used in normal multiplex and qualified modes Command Syntax SLAVe J clock spec gt lt K clock spec gt lt L clock spec lt any clock spec gt NEGative 0 POSitive 1 BOTH 2 DISabled 3 Example OUTPUT 707 SLAVE POSITIVE POSITIVE POSITIVE Query Syntax SLAVe 2 Returned Format SLAVe J clock spec gt lt K clock spec L clock gt lt 1 gt E
182. n a graph during a single acquisition frame When the data filter is toggled on these samples for a given data point are averaged together Connect Dots Connect dots provides a display of the sample points connected by straight lines Connect dots is selectable either on or off When on sample points on all graphs active or memory are connected HP 54201A D Front Panel 3 9 TRIG Menu The 54201A has a single menu for analog triggering The HP 54201D has an additional state 7 trigger menu The TRIG menu tree is shown in figure 3 14 TRIGger Analog Source Chan 1 Slope FH Chan 2 Slope External 1 xxx v centered V Auto Scale 41 Enabled L Disabled On Event 0 59999 Coupling 2 Mo Probe 10 1 50 J Probe 1 1 to 100 1 KKK State rode E Analog Only Mode H State Only 1 State Arms Analog Define Assignment State Mode Normal Qualified 4 Missing Bit Extra Bit Multiplexing Normal Mode Only Clock Assignments Pod Thresholds Labels Polarity Bit Assignment Sequence Sequence Terms Restart Terms Number Base Resource Terms Adjust and Centered not valid for External Trigger Source External trigger only HP 542010 only Figure 3 14 TRIG Menu Tree 3 18 HP 54201A D Front Panel TRIG ANALOG SUBMENU The TRIG Analog submenu provides
183. n the front panel two other groups of fundamental measurements exist The cursor values may be read over HP IB and a set of general purpose time voltage and point measurements are provided RESULts query RESULts is query which causes the 54201A D to output the list of active measurements which is displayed on screen Query Syntax RESULts 2 Returned Format RESULts 4 of measurements crlf lt Time measurement list gt lt 01 measurement list gt lt of measurements gt integer from 0 to 6 Time measurement list and Volt measurement list lt measurement name gt lt value gt lt validity gt lt crlf gt lt measurement name gt lt value gt lt validity gt lt cr1f gt lt measurement name gt lt value gt lt validity gt lt crl f gt 8 86 HP 54201A D Programming MEASURE SUBSYSTEM RESULts cont Number of answers returned in Time measurement list can be from 010 3 Number of answers returned in Volt measurement list can be from O to 3 Validity parameter only returned if SENDvalid command is set ON validity Example 6000 1 0 SCALING a THRESHOLD 2 CLIPPED 3 NOT_FOUND 6 DIM Results 200 OUTPUT 707 RESULTS ENTER 707 USING K Results PRINT USING K Results Defined Measurements The following measurements are defined for HP 54201A D DELay D
184. n this section 3 2 KEYBOARD The keyboard has 39 keys 37 of which serve two or more functions These secondary functions are accessed by pressing the BLUE shift key El When the shift key is pressed and active SHIFT is displayed in the upper right corner of the display For some functions the shift key will Stay active until pressed a second time Other functions automatically turn off the shift key to facilitate further user keyboard entries FIELD CURSOR Arrow Keys The field arrows move the blinking field cursor from field to field within the menus displayed on the CRT When waveform display cursor functions are selected the arrow keys move the X and O waveform cursors The left and right arrows move the X and O cursors horizontally along the waveform and the up and down arrows move the X and O cursors from one graph to another if more than one graph is displayed PREV FINE Keys The NEXT and PREV keys cycle through choices within the field that contains the blinking cursor a numeric field the NEXT 1 key increments the selection while the PREV key decrements the selection The shifted function of NEXT and PREV provides a FINE increment or decrement in numeric fields INSERT DELETE CLEAR ENTRY DON T CARE Keys O The INSERT key is used for adding selection fields in the TRIGGER State menu on the HP 54201D only and is used for some self test and calibration routines on the HP 54201A
185. nd query Command set the sampling mode for the HP 54201A D REALtime mode acquires all samples for a displayed waveform on a single sweep with a 50 MHz bandwidth REPetitive mode acquires samples for a displayed waveform on multiple sweeps with a 300 MHz bandwidth Valid time range for REALtime sampling mode is 50 ns to 10 s and valid time range for REPetitive mode is 10 ns to 20 us If the time range is greater than 20 us REALtime is always used independent of sample mode setting If the time range is less than 50 ns REPetitive sampling is always used independent of sample mode setting In general if the signal to be acquired is of a low repetition rate or is not truly repetitive and 50 MHz bandwidth is sufficient REALtime mode is preferable Query returns the currently selected sample mode Command Syntax SAMPle REALtime 0 1 REPetitive Example OUTPUT 707 SAMPLE REPETITIVE Query Syntax SAMPLE Returned Format SAMPle lt argument gt lt cr f gt Example OUTPUT 707 SAMPLE ENTER 707 Sample PRINT Sample aa SCALe command query Command sets autoscale mode for timebase Query returns the current autoscale mode Command Syntax SCALe DISabled PERiod POS pulse NEG pulse RISE ae ar caia Example OUTPUT 707 SCALE PERIOD Query Syntax SCALe Returned Format
186. nformation at different times For example data bits and address bits may be multiplexed on the same pins of the microprocessor The oscilloscope state trigger can demultiplex these lines To set the multiplexing mode on move the cursor to the Multiplexing field in the state trigger Assignment menu and press the NEXT or PREV key The slave clock latches in information from Pod 1 and Pod 2 while the master clock latches in information from Pod 0 On the occurrence of master clock both sets of information are checked for pattern recognition and correct sequence occurrence Therefore the master clock must follow the slave clock To select clock assignments move the cursor to the clock field and use the NEXT or PREV keys Rising edge falling edge either edge or inactive may be selected for the J K and L clocks 5 9 Threshold Assignments Input threshold levels can be selected for each pod The threshold is selected by moving the cursor into the field under an individual pod and selecting TTL ECL or absolute voltages between 9 9 V and 9 9 V Note All probe connections within a pod are assigned the same threshold level 5 10 Label Assignments and Polarity Move the cursor to the Label field in the state trigger Assignment menu A message will momentarily appear on the display screen indicating a new label may be added Press the INSERT key and a new label field will be added Labels are entered with numeric keys and or the blue shift
187. ng the RESULts query LAST measurement will be made if not specified otherwise more than 3 measurements are specified for the time list only the last 3 are retained performed and any others are discarded Example OUTPUT 707 DELAYI 2 OUTPUT 707 DELAY1 4 MINIMUM Query Syntax DELay lt graph gt lt graph gt When the query form is specified only the LAST measurement will be performed The measurement is performed immediately and not displayed on the HP 54201A D The results are placed in the output buffer of the HP 54201 0 with the following format Returned Format DELay lt value gt lt validity gt lt cr1f gt Example DIM Delay 30 OUTPUT 707 DELAY1 22 ENTER 707 Delay PRINT Delay When the DELay measurement is performed on envelope type waveforms the maximum wave data is used except for one case When the edges defined by the DEFine command are on the same graph graphs defined by DELay command and when the edge polarity and threshold levels are the same for each edge the delay is measured from the edge threhold on the maximum wave data to the like edge threshold on the minimum wave data This is a convenient way to make a jitter measurement Exampie DIM Jitter 30 OUTPUT 707 DEFINE DELAY NEGATIVE MIDDLE NEGATIVE MIDDLE OUTPUT 707 DELAY1 1 ENTER 707 Jitter PRINT Jitter HP 54201A D Programming MEASURE SUBSYSTEM Fundamental Measurements The following measurements
188. ntax Diagram cont 8 61 HP 54201A D Programming DISPLAY SUBSYSTEM DISPlay Commands ACCumulate COL CONnect ROW FORMat GRATicule INVerse LINE REFerence SCReen SHOW STRing TEXT VALues ACCumulate command query Command sets the accumulate mode enabled waveform data is displayed accumulated as it is acquired If fast is selected data is erased every 16 frames Slow erases every 64 frames Manual doesn t erase use system ERASe command Query returns the current accumulate mode selection DISabled Command Syntax ACCumulate FAST IN SLOW MANual Example OUTPUT 707 ACCUMULATE DISABLED Query Syntax ACCumulate 2 Returned Format ACCumulate lt argument gt lt cr1f gt Example OUTPUT 707 ACCUMULATE ENTER 707 PRINT Accum 8 62 HP 54201A D Programming DISPLAY SUBSYSTEM COLumn command query Command sets the specified column as the target for LINE or STRing commands This does not affect the current ROW command specification Query returns the current column number Command Syntax COLumn lt column number gt lt column number gt 0 63 Example OUTPUT 707 COLUMN 42 Query Syntax COLumn 2 Returned Format COLumn NRi crlf Example OUTPUT 707 COLUMN ENTER 707 Column PRINT Column r ROW command query Command sets the specified row as the target for LINE or STRing command This does not affec
189. nu structures of the HP 54201A D Section 4 Front Panel Exercises This section provides step by step exercises to familiarize the user with making measurements from the front panel of the HP 54201A D Section 5 State Triggering with the HP 542010 This section discusses the operation of the state triggering feature of the HP 54201D Section 6 Peripherals This section provides information for making hardcopy prints of the HP 54201A D display using a plotter or graphic printer Section 7 Remote Control Operation This section discusses the remote operation of the HP 54201A D over HP IB including compatibility remote local modes local lockout learn and calibration strings and notation and definitions This section should be reviewed before writing programs for this instrument Section 8 Programming the HP 54201A D This section provides programming instructions for the instrument including the instruction set syntax diagrams and other detail programming reference information 1 3 DESCRIPTION The HP 54201A and 542010 Digitizing Oscilloscopes are dedicated two channel simultaneous waveform acquiring digital storage oscilloscopes with full HP IB programmability digitized waveform data output and resident parametric waveform measurements 1 1 HP 54201A D General Information The HP 54201A D is a general purpose digitizing oscilloscope with 300 MHz repetitive bandwidth and a single shot digital storage bandwidth of 5
190. number of occurrences enter the desired value by using the numeric key pad or by pressing the NEXT or PREV key to increment or decrement the value Specify the number of occurrences to be 4 The oscilloscope will now trigger every fourth time the DAC is written to with all zeros on the data bus While the blinking cursor is in the Occurrences field press the INSERT key The sequence specification should say find then Count 4 Occurrences of a This is equivalent to finding 5 occurrences of before triggering the oscilloscope Press the INSERT key two more times The sequence specification should now read find a then a then a then Count 4 Occurrences of a This is equivalent to finding 7 occurrences of a before triggering the oscilloscope We should now have 4 sequence terms specified which is the maximum allowed Change the second term to b and the third term to c The sequence specification should now read find then b then c then Count 4 Occurrences of a as shown in figure 5 6 Each sequence term must be found before the next sequence term will be searched for If the sequence of events does not occur as specified in the state trigger sequence specification then the oscilloscope will not trigger The oscilloscope will now trigger only after all zeros are written to the DAC followed by all ones written to the DAC followed by anything written to the DAC followed by four more writes to the DAC with all z
191. ocal Lockout Clear Lockout Set Local Trigger Status bit and Abort messages It also can issue the Require Service message in local mode 7 9 Remote to Local Mode Changes The instrument always switches to local from remote whenever it receives the Local message GTL or the Clear Lockout Set Local message The Clear Lockout Set Local message sets the Remote Enable control line REN false If it is not in Local Lockout mode the instrument also switches to local when the front panel LOCAL key is pressed 7 5 54201A D Remote Control The instrument settings remain unchanged during remote to local transitions except Any dala transfers are aborted Screen is turned on DEBug command mode if on is turned off The REM 2 indication on the HP IB status display will disappear as the remote to local change is 7 10 LOCAL LOCKOUT When program control is interrupted which can happen by returnin i i g the instrument to local via the front panel LOCAL key data or settings could be changed This would leave the instrument in an unknown state To prevent this a local lockout may be used Local lockout allows return to local only under program control Note Return to local can also be accomplished by turning the instrument off then on again with the LINE switch However this technique has two potential disadvantages it defeats the purpose of local lockout that is the system controller may lose control
192. of the instrument Other conditions reset to default states at power on SRQ can be asserted to signal cycling the instrument power 7 11 ADDRESSING The HP 54201A D interprets the byte on the eight bus data lines as an address or a bus command if the bus is in the command mode Attention control line ATN true In addressable mode the instrument may be addressed to listen or to talk Once addressed to listen the instrument remains configured to listen until it receives an Abort message IFC its own talk address MTA or a universal unlisten command UNL from the controller Once addressed to talk the instrument remains configured to talk until it receives an Abort message IFC another instrument talk address its own listen address or a universal untalk command UNT The HP IB status display indicates on the CRT when the instrument is addressed to talk Talk or addressed to listen Listen The HP 54201 is shipped from the factory in the addressable mode with its talk address set to ie Refer to Table 7 1 for equivalent address codes instrument can also be configured in the talk only mode This mode enables limited bus operation without an HP IB system controller The instrument address and addressing mode may be displayed or changed from the front panel Complete instructions for these procedures are given in the Systems Peripherals Submenu paragraph in Section 3 of this m
193. omputation time is required Measurements can be turned off by moving the blinking selection cursor to the undesired measurement and pressing CLEAR ENTRY or SHIFT DELETE Remove both the rise time measurement and the fall time measurement 54201A D Front Panel Exercises S atus Fequired Frame 20126 Our Rise gt 7 88 ns Graph 1 67 i MENE Source 7 Sc Leve On Event Probe C Li d Loupling fde raph 1 87 2 49 5 06 Status Accucred Frame J LDE TALE Figure 4 6 4 8 HP 54201A D Front Panel Exercises 4 6 MEASURING FREQUENCY AND PERIOD To measure the frequency at least one period must be displayed on screen Press AUTO SCALE to rescale the waveform To measure the frequency press SHIFT FREQ 1 To measure the period press SHIFT PERIOD 1 figure 4 7 Remember that the 1 specifies that the measurement will be made on graph 1 4 7 CURSOR MEASUREMENTS Cursors provide a manual method of making measurements Using the cursors allows precise examination of particular points of interest Cursor measurements are made by first turning on the cursor values To do this make the shift function active by pressing SHIFT then press VALUES figure 4 8 cursor functions are performed while SHIFT is active A message in the upper right of the screen tells
194. on Query returns the y increment volts per q level for any addressed waveform This value is scaled for the data format specification currently set Command Syntax YINCrement lt NR3 gt Example OUTPUT 707 YINCREMENT 201 6E 6 Query Syntax YINCrement 7 Returned Format YINCrement NR3 cr1f Example DIM Yinc 30 OUTPUT 707 YINCREMENT ENTER 707 Yinc PRINT Yinc 8 141 54201 Programming WAVEFORM SUBSYSTEM ee M 0l YORigin command query Command sets the voltage at the midpoint of the voltage range the same as offset for memory waveforms only Query returns the y origin of the selected waveform the voltage at center screen for any selected waveform Command Syntax YORigin lt NR3 gt Example OUTPUT 707 YORIGIN 2 320 Query Syntax YORigin Returned Format YORIgin NR3 cr f Example OUTPUT 707 YORIGIN ENTER 707 Yorg PRINT Yorg _ command query Command has no effect but must be 62 BYTE or 15872 WORD depending upon FORMat selection Query returns the y reference value This value is used to normalize q level values the way waveforms are sent prior to conversion to volts Command Syntax YREFerence NRI Example OUTPUT 707 YREFERENCE 15872 Query Syntax YREFerence 7 Returned Format YREFerence NRI cr1f Example OUTPUT 707 YREFERENCE ENTER 707 Yref PRINT Yref 8 142
195. on Complete Pulse on State Sequence True High on State Sequence True Pulse on State Master Clock Beeper is ort Execute Calibration r 0 Cats 1 thru 4 I 1 Gain Offset Chani 2 Gain amp Offset Chan2 3 Trigger Hysteresis 4 Trigger Level iI 5 Delay Chan 6 Delay Chan2 I 7 Service Default Gain I 8 Service Default Offset amp Trigger 9 Service Default Delay Calibration oe amp ServiceJ fxecute Sel ftest 0 CPU Memory 1 Acquisition Trigger 2 Input Execute Service 7 0 Time Null E I 1 Ext Trigger t 2 Ext Trigger Hardware Service 342010 only DISPLAY MENU DISPLAY arat Frame arid 1 Number of Graphs 1i p Lines L off J mel on L Percent 55 99 Upper Volts 01 45 Lower EcL Accumulate Mode Disabied eastx stowe Manuat i Data icem Connect DE TES Accumulate Mode must be disabled before reference lines be enabled or defined Reference lines must be off before accumulate mode can be enabled 54201A D Front Panel TRIGGER MENU TRIGger Analog 7 Source Chan 1 Siope Et Chan 2 ci Slope External Level Adjust 1
196. on the status line of the display MSG query is used to determine the message code RQS Requesting service High indicates that this instrument requested service ERR Error High indicates an error occurred ERRor query is used to determine error code RDY Ready High indicates the instrument is ready This is based on the ready mask A RDY query is used to determine condition LCL Local switch or power cycle High indicates that the instrument has been switched to local from the front panel or that the power was cycled off then on again FPS Front pane service request High indicates a front panel key has been pressed KEY query is used to determine the key code PWR Not used always O RQC Not used always O STOP command Command which causes HP 54201A D to stop running Command Syntax STOP Example OUTPUT 707 STOP HP 54201A D Programming SYSTEM COMMANDS TEST TST command query Command form executes the specified self test Failures are reported as errors If the query form of the command is used the specified self test is executed and the result of the test is returned in the form of a 16 bit word A result of 0 indicates the test passed Note Inputs must be properly configured before the TEST command is issued TEST 0 No special configuration required TEST 1 All input signals must be disconnected TEST 2 Connect rear panel BNC to INPUT 1 BNC TEST 3 Connect rear
197. or setting up the oscilloscope analog trigger conventional oscilloscope triggering The blinking cursor should be in the Analog field Press the NEXT or PREV key to display the trigger STATE menu The display should appear as shown in figure 5 2 5 5 Trigger Mode Assignment Move the blinking cursor to the Trigger Mode field and press the NEXT or PREV key to cycle through the three trigger mode options Trigger mode determines whether the instrument will trigger on the conditions specified in the analog trigger submenu Analog only or will trigger on the conditions set up in state trigger submenus State only or whether the state conditions will first be found and then used to arm the analog trigger State Arms Analog This trigger mode field is also present in the State Trigger Sequence menu 5 6 State Mode Assignment Move the blinking cursor the the State Mode field and press the NEXT or PREV key to cycle through four state modes that are available Normal State patterns up to 27 channels wide may be defined as trigger qualification Up to four unique state patterns can be qualified on in a user defined sequence This mode is identical to that of state triggering in the HP 1630 and HP 1631 Logic Analyzers 5 2 54201A D State Triggering Qualified When in the qualified mode multiplexing is automatically turned on In addition the state sequence search does not begin until after the qualify clock has occurred The s
198. organization of the manual and the index make specific topics easy to find L Easy Fairly Easy D Difficult Quite Difficult 3 How would you rate Excellent Good Adequate Poor The depth of coverage Examples and figures Please explain 4 What did you find to be most helpful in this manual 5 What did you find to be least helpful 6 What was your level of knowledge about oscilloscopes before you began using this manual None Beginner Intermediate Expert Name Address THANK YOU FOR YOUR HELP NO POSTAGE NECESSARY IF MAILED IN U S A FOLD HERE U caus BUSINESS REPLY CARD FIRST CLASS PERMIT NO 1303 COLORADO SPRINGS COLORADO POSTAGE WILL BE PAID BY ADDRESSEE HEWLETT PACKARD COLORADO SPRINGS DIVISION ATTN PUBLICATIONS DEPT PO BOX 2197 COLORADO SPRINGS COLORADO 80901 2197 NO POSTAGE NECESSARY IF MAILED IN THE UNITED STATES FOLD HERE Your cooperation in completing and returning this form will be greatly appreciated Than you SAFETY CONSIDERATIONS GENERAL This is a Safety Class instrument provided with terminal for protective earthing OPERATION BEFORE APPLYING POWER verify that the power transformer primary is matched to the available line voltage the correct fuse is installed and Safety Precautions are taken see the following warnings In addition note the Instrument s external markings which are described under Safety Symbols o Servicing instr
199. ot Pariod Hot aE My Y 1 53 pg div 20 49 w Figure 4 13 e Hzcumulate Mede a Filter 1 53 pe div 20 49 Figure 4 14 4 12 LOOKING AT PULSES 4 13 Positive Pulse Width To measure a positive pulse width using automatic measurements first show a positive pulse on screen To do this go to the TIME menu and select Pulse in the Auto Scale field figure 4 15 Press AUTO SCALE then press SHIFT WIDTH 1 figure 4 16 As in ail automatic measurements the 1 specifies that the measurement will be made on graph 1 The answer is shown in the measurement results area 4 14 Negative Pulse Width To measure a negative pulse width go to the TIME menu and select Pulse for Auto Scale then press AUTO SCALE This will display a negative pulse on screen Next press SHIFT WIDTH 1 figure 4 17 4 15 DUTY CYCLE Duty cycle can be measured by adjusting the time range to show two periods 100 us if a 35 kHz signal is being used then press SHIFT DUTY 1 figure 4 18 Signals may be scaled manually as in this example or using Auto Scale as in previous examples Return the TIME menu Auto Scale to Period and press AUTO SCALE HP 54201A D Front Panel Exercises Tinebase Status Acquired Frame BG131_ TRLF ONLY Scale 1 Peat Time 1 Sampling 18 8 MHz Rode Range Graph LET V die 2 49 V 18 0
200. panel BNC to INPUT 2 BNC Command Syntax TEST TST test number test number 0 Self test 0 CPU Memory 1 Self test 1 Acquisition Trigger 2 Self test 2 Channel 1 Input 3 Self test 2 Channel 2 Input Example OUTPUT 707 TEST 3 Query Syntax TEST TST test number Returned Format TEST TST NR1 Example OUTPUT 707 TEST3 ENTER 707 Test3 PRINT Test3 In this example assume the result returned in Test3 is the number 384 then 384 256 128 therefore bits 9 and 8 were set Refering to bits 9 and 8 for TEST3 in the table on the next page you can see that CHAN 1 and CHAN 2 failed 8 43 HP 54201A D Programming SYSTEM COMMANDS TEST TST cont TEST Query Result Register Encoding BINARY WEIGHT 0 STATE BOARD FAILED STATE POD FAILED INTERPOLATOR FAILED AUTOSCALE FAILED FISO FAILED CHAN 2 FAILED CHAN 1 FAILED 0 ACQUISITION TRIGGER FAILED RAM FAIL ROM FAIL 0 STC FAIL HPIB FAIL 8 44 TEST2 and 5 2 FAILED CHAN 1 FAILED 0 0 INPUT TEST FAILED HP 54201A D Programming ACQUIRE SUBSYSTEM NENNEN MEUM n d ACQuire command query The acquire subsystem allows the store mode for channel 1 and channel 2 to be set the same with two commands TYPE and COUNt The POINts command is included to provide compatibility between HP HP 54201A D programs and HP 54100A D programs The TYPE and COUNt functions may be seleclively p
201. ped to the next line irrespective of word boundaries At the end of the string the row and column is set to the next available number 1f column limit is reached on row 4 the display is rolled up and the new line 4 is set to before the write operation continues Refer to the LINE command for similar appliation Command Syntax STRing lt any quoted string gt Example OUTPUT 707 STRING Press INSERT to continue TEXT command query TEXT OFF command sets menu previously displayed before text was turned on no effect if text isn t TEXT ON saves current menu and puts on text menu TEXT BLANK clears text memory sets COLumn 1 and ROW 1 but doesn t affect what menu is displayed Query returns text on off status Command Syntax OFF 0 ON 1 BLANK 2 Example OUTPUT 707 TEXT ON Query Syntax TEXT 7 Returned Format TEXT argument cr f Example OUTPUT 707 TEXT ON 8 68 HP 54201A D Programming DISPLAY SUBSYSTEM VALues command query Command controls the display of the cursor values readout If off the labels for the graphs are displayed Query returns the values mode Command Syntax VALues OFF 01 ON 1 Example OUTPUT 707 VALUES ON Query Syntax VALues Returned Format VALues lt argument gt lt cr f gt Example OUTPUT 707 VALUES ENTER 707 Values PRINT Values HP 54201A D Programming DISPLAY SUBSYSTEM Notes HP 5
202. r and sets up a trigger level If Auto Scale is disabled pressing the front panel AUTO SCALE key will not change any parameters set on the TRIG Analog submenu On Event This selection allows you to delay triggering the instrument until n trigger events holdoff by events have occurred n is selectable from 1 to 59999 events When using the HP 54201D in the State Arms Analog trigger mode you can get two levels of digital delay through the pod inputs and one through the front panel inputs using holdoff by events Refer to Armed Digital Delay in Section 5 for detailed information Coupling Trigger coupling for internal trigger sources tracks the coupling of the channel 1 or channel 2 source Input coupling for external trigger can be selected as 509 dc or can be selected as 2 dc with 10 1 probe attenuation factor 3 20 HP 54201A D Front Panel TRIG STATE SUBMENU HP 54201D only In addition to analog edge triggering the HP 54201D can also trigger on a state condition or arm the analog trigger after a state condition Detailed state trigger information is given in Section 5 of this manual The state submenu is selected by moving the blinking cursor to the trigger field and pressing the NEXT or PREV key This only chooses the state submenu and does not change the trigger from analog to state Two selections the assignment menu and the sequence menu are available in the state trigger submenu and are selected from the Defin
203. r inputs or outputs and appear within the symbols with imbedded carriage returns CR and line feeds LF The input and output buffers are displayed exactly as they are received or sent with the exception that binary blocks are represented in an abbreviated fashion Spelling and syntax errors can be quickly located and corrected by stepping through a program If an error occurs the error is highlighted with an inverse video cursor on the HP 54201A D display An error message is then displayed followed by message text on the status line of the HP 54201A D Query returns the current debug mode Command Syntax DEBug ON 1 1 OFF 0 J Example OUTPUT 707 DEB ON Query Syntax DEBug Returned Format DEBug lt argument gt lt cr gt Example OUTPUT 707 DEBUG ENTER 707 Debug PRINT Debug 8 19 HP 54201A D Programming SYSTEM COMMANDS DIGitize command Upon receipt of the DiGitize command and the DiGitize command is sent with an argument or CHANnel2 graphs are turned and acquisition is stopped DlGitize automatically assigns channels to their default graphs for convenience of measurements following acquisition The DlGitize command then causes HP 54201A D to start running as if the RUN command had been sent When each requested source completes its acquisition it is turned off no longer acquired When all are acquired acquisition is stopp
204. raphics printers that use the Hewlett Packard Raster Graphics Standard and the HP IB Connect the graphics printer to the HP IB connector on the rear panel of the HP 54201A D using an HP IB interface cable Before the graphics printer is energized locate the HP IB configuration switch on the printer and set the LISTEN ALWAYS or LISTEN ONLY switch to the True 1 position refer to the printer manual It is important that this switch is set before the power is applied to the printer because most printers only read these switch Settings when power is first turned on the printer has been connected to the HP 54201A D and the printer configuration switch has been set to LISTEN ALWAYS press the HP 54201A D front panel SYSTEM menu key Display the Peripherals submenu and move the blinking cursor to the Hardcopy Device 15 field If Printer is not displayed in this field press the NEXT PREV key to display Printer The hardcopy function will dump exactly what is displayed the HP 54201A D display Set up the display exactly as it is to be printed then press the HARDCOPY shift TTL key to print the display The status line of the display will read WAIT Hardcopy in Progress To abort the hardcopy press the CLEAR ENTRY key If the printer is not connected or not working properly the status line of the display will report WARNING Transmission Aborted then will display No Hardcopy Device 6 4 PLOTTERS The HP 54201A D will
205. rd 7 bit ASCII code The instrument responds equally to upper and lower case characters Parameter fields containing multiple parameters require a comma to delimit individual parameters Errors in Data messages syntax are trapped and can be reported via the HP IB For details about detecting and reporting format errors refer to the STAtus and ERROor programming commands in Section 8 of this manual 7 9 HP 54201A D Remote Control 7 19 SENDING THE DATA MESSAGE The HP 54201A D can send Data messages in local or remote mode when it is addressed to talk or in the lalk only mode Note Before the instrument is addressed to talk the desired output data must be specified with the appropriate input Data message otherwise the instrument sends nothing 7 20 Output Data Message Format Output Data messages include the settings of individual functions instrument status information and binary Learn String data Refer to the LONGform HEADer and ARGument programming commands in Section 8 of this manual for more information on output format selection Note Exponential values are sent by the HP 54201A D with the ASCH character E upper case as the separator between the mantissa and the exponent 7 21 LEARN MODE If the HP 54201A D receives a SETup instrument setup query command and is then addressed to talk it sends the Learn String The learn string is a binary data block type A that contain
206. rd identifying a particular sector on the track before counting system clocks Figure 5 11 and 5 12 show the state trigger Assignment and Sequence menus for an example such as described above The slave clock is connected to the index pulse the master clock to the system clock and data inputs of one of the pods are connected to the parallel bus output of the disc drive unit State d is defined as the sector identification for sector 4 Acquisition is triggered only after finding the index pulse then sector 4 and finally 200 occurrences of the system clock Besides providing a very versatile method of digital delay the analog inputs of the oscilloscope are free to probe analog signals such as the data being read from the disc read data and the differentiated signal of read data If the digital delay were part of the analog trigger section the analog inputs would always be connected to digital signals for triggering rather than monitoring the critical analog signals that must be characterized Two levels of digital delay may be realized by using this same setup with the following changes Change Trigger Mode to State Arms Analog then go to the analog trigger menu and specifiy the On Event holdoff by events field to be any number from 1 to 59999 Now one state trigger 500th occurance of a system clock after the index pulse will satisfy one event of On Event counter 5 13 HP 54201A D State Triggering Trigger __ ______ Status
207. re retained performed and any others are discarded Example OUTPUT 707 FREQUENCYI or OUTPUT 707 4 If the query form is specified the measurement is performed immediately and not displayed on the HP 54201A D The results are placed in the output buffer of the HP 54201A D with the following format for non delay measurements Returned Format measurement name value validity cr lf Example DIM Rise 30 OUTPUT 707 RISE ENTER 707 Rise PRINT Rise Note When any of these defined measurements except TMAX TMIN VMIN VMAX and are performed on envelope type waveforms the maximum wave data is always used All wave data is used for TMAX TMIN VMIN VMAX and VPP 8 89 HP 54201A D Programming MEASURE SUBSYSTEM Defined Measurements cont DELay command query Command Syntax DELay lt graph gt lt graph gt LAST MINimum MAXimum AVErage LAST delay measured for last acquistion MINimum minimum delay measured for on acquisitions since DELay executed MAXimum maximum delay measured for on acquisitions since DELay executed AVErage average of delay measured for all acquisitions since DELay executed If no graph is specified the graph specifed with the MEASure source command is measured When the command form is specified the DELay measurement is added to the time measurement list on the 54201A D display and the answers are returned to the controller usi
208. rm command has been set OFF If the HEADer command is set OFF neither long nor short form format will be returned to the controller In addition to providing some memory savings in your application program the use of short form gives slightly faster command transmission and execution time at the expense of readability 8 4 ALPHA AND NUMERIC ARGUMENTS Most of the programming commands that require parameters can use either alpha or numeric arguments as their parameters For these commands the syntax of the command gives the relationship between the numeric and alpha arguments For example if the syntax of a command is SCReen OFF 0 ON 1 executing SCREEN OFF is the same as SCREEN 0 and executing SCREEN ON 15 the same as SCREEN 1 The commands may be executed using either alpha or numeric arguments When query is executed the answer returned to the controller will be returned in alpha format if the ARGument command has been set to ALPHa and will be returned in numeric format if the ARGument command has been set to The HP 54201A D parses input data messages using alpha arguments somewhat faster than those using numerics however in response to queries the two formats are equivalent in execution time 8 5 HP 54201A D Programming 8 5 NOTATION CONVENTIONS AND DEFINITIONS The following conventions are used in this manual in descriptions of remote operation lt gt Angular brackets enclose d
209. rogrammed by using the STORe command of the channel subsystem The ACQuire command selects acquire subsystem as the destination for the commands that follow The ACQuire query responds with the settings of the acquire subsystem Store mode and completion criteria for all active sources are set to be the same as those in effect for channel 1 Command Syntax ACQuire Example OUTPUT 707 ACQUIRE Query Syntax Returned Format ACQuire crlf 1 TYPE lt argument gt lt crl f gt POINts lt NR1 gt lt crif gt COUNt lt NR1 gt lt cr1f gt FILTer argument crlf Example DIM Acquire 70 OUTPUT 707 ACQUIRE ENTER 707 USING K Acquire PRINT USING K Acquire HP 54201A D Programming ACQUIRE SUBSYSTEM EN ACQuire Commands COUNt FILTer POINts TYPE acduire 7 q 2 o POINtS points_arg cal 85429104 ACQuire Subsystem Syntax Diagram 8 46 HP 54201A D Programming ACQUIRE SUBSYSTEM ____________________ COUNt command query f store mode is type average command signifies both the terminal count and the number of averages sample weighting factor For the other store modes command determines the terminal count that is the number of frames which were acquired For normal store mode the count parameter can be 1 to 10 000 For average mode the
210. rvice Manual HP 542010 only Three HP 10271 10 bit State Data Probes 1 2 HP 54201A D Getting Started SECTION 2 GETTING STARTED 2 1 PREPARATION FOR USE 2 2 Power Requirements The HP 54201A D requires a power source of either 115 or 230 22 to 10 single phase 48 to 66 Hz 275 watts maximum The instrument may be damaged if the Line Voltage Select Switch is not properly set to match the input voltage 2 3 Line Voltage Selection Before turning ON the instrument verify that the Voltage Selector switch on the rear panel matches the input line voltage The 6 Amp fuse installed satisfies both voltage settings of 115 and 230 VAC 2 4 Power Cable This instrument is equipped with a three wire power cable When connected to an appropriate AC power outlet this cable grounds the instrument cabinet The type of power cable plug shipped with the instrument depends on the country of destination See figure 2 1 for option numbers of power cables and plug configurations available OPTION 942 E UROPEEN OPTION 412 OPTION 906 SH OPTION STD HP 8122 1692 CONTINENT CARE HP 8120 2952 CABEN HP 8120 2296 CABLE 6120 1521 U S CANADA Re 22 v OPERATION 125V OPERATION RUSTRRILIR OPTION 304 ZEALAND OPTION 00 CARLE HP 6126 0696 CRELE HP 8120 0648 CABLE MP 8120 1703 Figure 2 1 Power Cord Configurations 2 1 HP 54201A D Getting Started 2 5 OPERATING ENVIRONME
211. s instrument configuration This binary data can be stored in the controller memory for future use The learn string can be returned to the HP 54201A D restore configuration Refer to the SETup programming command in Section 8 of this manual for more detailed information 7 22 RECEIVING THE CLEAR MESSAGE The HP 54201A D responds to the Clear message lt DCL gt and Selected Device Clear message SDC by 1 Clearing all serial poll status bits 2 Clearing the input and output buffers 3 Clearing the error msg and key queues 7 23 RECEIVING THE TRIGGER MESSAGE The HP 54201A D responds to the Trigger message lt GET gt bus command the same way that it responds to a DiGitize system command 7 24 RECEIVING THE REMOTE MESSAGE The Remote message has two parts First the remote enable bus control line REN is held true then the device listen address MLA is sent by the controller The HP 54201A D is enabled to go into remote when REN goes true but it does not actually switch into remote until addressed to listen the first time No instrument settings are changed by the transition from local to remote When actually in remote mode the instrument displays REM in the HP IB status display to indicate remote mode 7 10 HP 54201A D Remote Control 7 25 RECEIVING THE LOCAL MESSAGE The Local message returns the HP 54201A D to front panel control The local message GTL bus command addresses the instrument to
212. s or fumes Operation of any electrical instrument in such an environment constitutes a definite safety hazard Do not Install substitute parts or perform any unauthorized modification to the instrument o Adjustments described the manual are performed with power supplied to the instrument while protective covers are removed Energy available at many points may if contacted result in personal injury oAny adjustment maintenance and repair of the opened instrument under voltage should be avoided as much as possible and when inevitable should be carried out only by a skilled person who Is aware of the hazard involved o Capacitors inside the instrument may still be charged even if the instrument has been disconnected from its source of supply SAFETY SYMBOLS Instruction manual symbol The product will be marked with this symbol when It Is necessary for the user to refer to the instruction manual in order 1o protect against damage to the product 4 indicates hazardous voltages zs Earth terminal sometimes used in manual to indicate circuit common connected to grounded chassis The WARNING sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING sign until the Indicated conditions are fully understood and met The CAUTION sign denotes a hazard It calls attention to an oper
213. s specified a quoted string up to 32 characters long is returned if NUMber is specified or no argument is sent only the error number is returned All errors will halt parsing Refer to system MSG query for other types of messages Query Syntax ERRor NUMber 0 STRing 1 2 Returned Format ERRor lt NR1 gt lt cr1f gt lt string gt lt crlf gt Example OUTPUT 707 ERROR STRING 2 ENTER 707 String PRINT String Device Dependent Error Messages Primarily from local operation ERROR NO ERROR STRING 3 Register Write Protected 4 Not Allowed In This Menu 5 Graphics Must Be On 8 Use NEXT PREV Keys 9 Numeric Entry Required 10 Use Hex Keys 11 Use Alphanumeric Keys 13 Requires Correction First 15 DON T CARE Not Allowed 16 Use 0 or 1 17 Use 0 1 or DON T CARE 18 Use 0 thru 7 19 Use 0 thru 7 or DON T CARE 20 Use 0 thru 3 21 Use 0 thru 3 or DON T CARE 22 Value is Too Large 23 CHS Not Allowed 25 Value Not Allowed 30 Maximum INSERT s Used 31 Use 0 thru 9 39 Turn Lines Off First 40 Disable Accumulate First 43 Must Be in Talk Only 49 Value Out of Range 58 No Hardcopy Device 70 Cal RAM Write Protected 86 Hardware Failure 89 Local Lockout In Effect 90 Key Not Allowed in Remote 126 RAM Data Loss 127 Firmware Error HP 54201A D Programming SYSTEM COMMANDS ENDE MOM ML ERRor cont Standardized HP IB Error Messages ERROR ERROR STRING 100 In Controller Command 11
214. s the restart expression 1 to 4 terms may be used in a compound expression Only one term may be specified if using NOSTate or ANYState list items The D and NOTD terms are not permitted in missing bit or extra bit modes Query returns the restart expression Command Syntax RESTart sequence restart list sequence restart 11552 list item list item list item gt lt list item list item gt ANYState 1 A 2 B 31 4 D 5 NOTA 16 NOTB 71 NOTC 81 NOTD 9 NOSTate 101 Example OUTPUT 707 RESTART B NOTC Query Syntax RESTart 2 Returned Format RESTart lt sequence restart list crlf Example DIM Restart 50 OUTPUT 707 RESTART ENTER 707 Restart PRINT Restart 8 113 HP 54201A D Programming STATE SUBSYSTEM Notes 8 114 HP 54201A D Programming TIMEBASE SUBSYSTEM TiMebase command query The timebase group controls all X axis oscillscope functions The command selects timebase as the destination for the commands that follow The TIMebase query responds with all of the settings for the timebase Command Syntax Example OUTPUT 707 TIMEBASE Query Syntax TIMebase Returned Format lt 1 gt MODE lt argument gt lt cr1f gt RANGe NR3 cr 1f DELay NR3 cr1f REFerence lt argument gt lt cr f gt SAMPle lt argument gt lt cr1f
215. s to stopping 8 31 HP 542014 0 Programming SYSTEM COMMANDS deu RN RECall command Command displays a waveform from HP 94201A D memory the specified graph or restores the specified instrument setup Refer to the SAVE command to save waveforms or setups RECall SETup is a special function which returns the instrument to the state it was in before AUToscale ECL or TTL was executed Command Syntax RECall GRAPh graph MEMory lt memory gt SETup memor ys 1 lt gt 1121314 lt memory gt 0111213 9 Examples OUTPUT 707 RECALL GRAPHI 2 is equivalent to OUTPUT 707 RECALL GRAPHI MEMORY2 OUTPUT 707 RECALL SETUP MEMORYO is equivalent to OUTPUT 707 RECALL SETUPO and OUTPUT 707 RECALLO DM REQuest RQS command query THe REQuest command sends an SRQ enable code which is an integer representing the binary weighted values of the condition bits in the ready mask and the RQS mask The ready mask determines what ready conditions cause the ready bit in the status byte to be set The RQS mask determines what conditions will cause an SRQ to be issued Setting the SRQ enable code clears any pending SRQ as well as all errors messages and keys awaiting query Bits 0 1 6 are don t cares and are always set to zero Query returns the current SRQ enable code Command Syntax REQuest RQ
216. s to the printer or plotter Rear Panel BNC The output of the BNC on the rear panel can be programmed for six possible conditions for the 54201A and nine conditions for the HP 54201D All outputs are a TTL level Select the appropriate output by pressing the NEXT key The possible outputs are Constant Low The output is held at a logic 0 This is the default condition when a key down power up reset is executed Constant High The output is held at a logic 1 Probe Compensation 2 kHz This output is a 2 kHz square wave used for probe compensation If the signal is used without a 50 ohm termination the falling edge must be used for compensation High on Trigger This output latches high when the HP 54201A D receives trigger High on Frame Complete This output goes high when the HP 54201A D stops acquiring data for one frame High on Acquisition Complete This output goes high when the desired number of averages 4 16 64 or 256 has been attained Pulse on State Sequence True HP 54201D only This selection gives pulse output whenever the state sequence is found High on State Sequence True HP 54201D only The output goes high when state Sequence provides a trigger for the HP 54201D Pulse on State Master Clock HP 54201D only A 20 ns pulse is output when the Specified state master clock occurs Beeper is This selection turns the audible warning beeper on or off by pressing
217. se otherwise an error is generated Note GAIN requires all front panel inputs to 54201 D be disconnected before being executed or an erroneous cal will be performed DELay requires rear pane BNC be connected to INPUT 1 or INPUT 2 as appropriate or an erroneous cal will be performed Command Syntax CALibrate GAIN 9 DELay 1 11 1 J CHANnel2 2 1 LABel lt string gt 2 lt string gt Examples OUTPUT 707 CAL LABEL CAL PERFORMED XX XX XX OUTPUT 707 CALIBRATE DELAY CHANNEL1 Query Syntax CALibrate LABel This query returns the current cal label Returned Format CALibrate lt 64 character quoted string gt lt cr1f gt Example DIM 15 80 OUTPUT 707 CALIBRATE LAB 2 ENTER 707 Cal PRINT Cal 8 18 HP 54201A D Programming SYSTEM COMMANDS i COPY command Command which copies data from first graph specified to second graph specified Command Syntax COPY lt copy specification gt copy specification GRAPh graph gt GRAPh lt graph gt graph gt 1121314 Example OUTPUT 707 COPY GRAPH 1 GRAPH 2 NENNEN Mitt io DEBug command query The system DEBug command helps those who are unfamiliar with the command syntax to find programming errors When DEBug ON is issued each command is shown on the HP 54201A D display as the command is received over the HP IB The commands are defined as eithe
218. sent regardless of what type waveform is addressed Query returns the format specification in effect Command Syntax FORMat I BYTE 1 WORD 21 Example OUTPUT 707 FORMAT WORD Query Syntax FORMat Returned Format FORMat argument cr f Example OUTPUT 707 FORMAT ENTER 707 Format PRINT Format MM M M M M IMPedance command query Command sets the impedance 500 or 1 in the waveform preamble Query returns the coupling impedance for the waveform Command Syntax IMPedance LOW 0 HIGH 1 J Example OUTPUT 707 IMPEDANCE HIGH Query Syntax IMPedance Returned Format IMPedance lt argqument gt lt cr1f gt Example OUTPUT 707 IMPEDANCE ENTER 707 Imped PRINT Imped 8 136 HP 54201A D Programming WAVEFORM SUBSYSTEM LABel command query Command sets the labe field for the addressed waveform Query returns the label for the addressed waveform Command Syntax LABel 10 characters quoted Example OUTPUT 707 LABEL Waveform 1 Query Syntax LABel 7 Returned Format LABel 10 characters quoted cr f Example OUTPUT 707 LABEL ENTER 707 Label PRINT Label POINts command query Command sets the number of points for a memory waveform Must be in the range from 51 to 1001 Query returns the number of data points in the addressed waveform Value is 1001 for active sources for graphs and memories may
219. sign M M MODE command query Command sets the state trigger mode Query returns the current mode selection Command Syntax MODE NORMal 0 QUALified 1 MISsing 2 3 1 EXTRa 1 Example OUTPUT 707 QUALIFIED Query Syntax MODE Returned Format MODE argument crlf Example OUTPUT 707 MODE ENTER 707 PRINT Mode 8 102 HP 54201A D Programming STATE SUBSYSTEM MULTiplex command query Command defines multiplexing of clocks when state is in normal mode other modes have predefined multiplexing Query returns the multiplexing mode in effect when in normal mode Command Syntax MULTiplex ON 1 OFF 01 Example OUTPUT 707 MULTIPLEX Query Syntax MULTiplex Returned Format MULTiplex lt argument gt lt cr1f gt Example OUTPUT 707 MULTIPLEX ENTER 707 Muit PRINT Mult CLOCk command query Command sets the clock polarities for the master clock used in the normal mode with multiplexing off Query returns the master clock settings used in normal with multiplexing off Command Syntax CLOCk lt J clock spec gt lt K clock spec L clock spec gt any clock spec gt NEGative 0 POSitive 1 BOTH 2 DISabled 31 Example OUTPUT 707 CLOCK POSITIVE NEGATIVE POSITIVE Query Syntax CLOCk Returned Format CLOCk J clock spec K clock spec gt lt L clock spec gt lt cr f gt Exa
220. t Query returns the current sequence settings Command Syntax SEQuence Example OUTPUT 707 SEQUENCE Query Syntax SEQuence Returned Format SEQuence lt crlf gt 1 FIND sequence find list gt lt cr1f gt COUNt NRI cr lf OF lt sequence trigger list gt lt crlf gt TERMs lt argument gt lt cr1f gt RESTart lt sequence restart list gt lt cr1f gt Example DIM Seq 200 OUTPUT 707 SEQUENCE ENTER 707 Seq PRINT Seq 8 110 HP 54201A D Programming STATE SUBSYSTEM FIND command query Command defines the sequence terms that must be found before the trigger term There can be 0 1 2 or 3 sequence terms FIND NOTHing specifies the O term case Terms D and NOTD are not permitted in missing bit and extra bil modes Query returns the sequence term list Command Syntax FIND sequence find list lt sequence find list gt NOTHing 0 list item list item list item 111 list item gt ANYState 1 12 B 3 14 0 5 NOTA 61 NOTB 71 NOTC 8 19 J Example OUTPUT 707 FIND ANYSTATE Query Syntax FIND Returned Format FIND lt sequence find list gt lt crif gt Example OUTPUT 707 FIND ENTER 707 Find PRINT Find COUNt command query Command programs the trigger term occurrence count Range is 1 to 59999 Query returns the occurrence count Command Syntax COUNt lt NRI gt Example OU
221. t the current COLumn command specification Query returns the current row number Command Syntax ROW 1 2 3 4 Example OUTPUT 707 ROW 3 Query Syntax ROW Returned Format ROW lt NR1 gt lt cr f gt Example OUTPUT 707 ROW ENTER 707 Row PRINT Row 8 63 HP 54201A D Programming DISPLAY SUBSYSTEM CONnect command query Command sets connect dots mode for displayed waveforms on or off Query returns status of connect dots mode Command Syntax CONnect OFF 0 ON 11 Example OUTPUT 707 CONNECT ON Query Syntax CONnect Example OUTPUT 707 CONNECT ENTER 707 Connect PRINT Connect FORMat command query Command sets the number of graphs displayed number must be 1 2 or 4 Query returns the number of graphs displayed Command Syntax FORMat 1 2 4 Example OUTPUT 707 FORMAT 2 Query Syntax FORMat Returned Format FORMat lt NR1 gt lt cr1f gt Example OUTPUT 707 FORMAT ENTER 707 Format PRINT Format 8 64 te HP 54201A D Programming DISPLAY SUBSYSTEM GRATicule command query Command sets the graticule type on the display graph Query returns the graticule type displayed Command Syntax GRATicule GRID 1 FRAMe 2 J Example OUTPUT 707 GRATICULE GRID Query Syntax GRATicule 2 Returned Format GRATicule lt argument gt lt cr f gt Example OUTPUT 707 GRATICULE ENTER 707 Grat PRINT Grat INVerse command Command s
222. t might otherwise be overlooked Bit fault triggering has numerous applications especially in detecting faults during digital signal transmission and in disc drive measurements 5 17 The Faults A missing bit signal dropout is the absence of a signal transition within a given time window This window is referred to as the reference cell An extra bit glitch is the occurrence of two or more transitions within a time window Figures 5 13 and 5 14 illustrate two examples of these cases Missing Bit Trigger 4 ce11 5 11 Point Reference Cell J Input Serial Data L Input Figure 5 13 Missing Bit Timing Diagram Extra Bit cel1 11 Reference 11 J C1k Input Serial Data Clk Input Trigger Point Figure 5 14 Extra Bit Timing Diagram HP 54201A D State Triggering For the HP 54201D to detect a fault a reference Signal and serial data signal under test must be applied to the J and L clock inputs on the oscilloscope state pods The pod inputs are logic analyzer type triggering probes which are separate from the analog inputs In the examples shown in figure 5 13 and 5 14 the reference input is a simple repetitive clock with the serial data input being a return to zero RZ signal Depending upon the application various combinations of edge selections can be made defining reference cell boundaries and data transitions For example
223. tart condition and the oscilloscope is triggered if the sequence specification is satisfied The restart term can consist of up to four individual ORed terms These terms can be entered by pressing the INSERT key while the cursor is in the Sequence Restart field To delete ORed terms press the DELETE key Specify the restart term to restart on state pattern d The state trigger specification should now appear a shown in figure 5 7 Figure 5 8 shows a flow chart for trigger sequence Trigger Found TALK ONLY Define Trigger Mode In Sequence Trigger Teri then then 3 then ur 1 af Trigger Acquisition Sequence Restart Label ADDR DATA Base gt Figure 5 7 State Trigger Sequence Menu 5 10 HP 54201 0 State Triggering START In sequence find a then b then c then 4 occur of a Sequence Restart on d SEQ RESTART TERM 2 4 RESTART TERM 4 SET TRIGGER OCCUR COUNTER TO MAX NO OF TRIG OCCUR TRIG TERM a DECREMENT TRIG OCCUR COUNTER RESTART TERM 4 TRIG OCCUR 0 YES TRIGGER THE OSCILLOSCOPE Figure 5 8 State Sequence Triggering Flowchart HP 54201A D State Triggering 5 15 USING QUALIFIED MODE FOR ARMED DIGITAL DELAY As discussed in the previous section specifying a trigger after N occurrences of anystate is equivalent to triggering after N occurrences
224. tax AUToscale FULL 0 SELective 1 Example OUTPUT 707 AUTOSCALE SELECTIVE 8 16 HP 54201A D Programming SYSTEM COMMANDS EMEN ER Dc BEEPer command query Commands sets beeper mode If no argument is passed a beep is sounded without affecting the beeper status Query returns the current beeper mode Command Syntax BEEPer OFF 0 ON 11 Example OUTPUT 707 BEEP OFF Query Syntax BEEPer Returned Format BEEPer lt argument gt lt cr f gt Example OUTPUT 707 BEEPER 2 ENTER 707 Beep PRINT Beep ____________________________ BNC command query Command sets the output mode of the rear panel BNC Query returns the current mode of rear panel BNC Command Syntax LOW HIGH PROBe TRIGger FRAMe COUNt PULSE SEQ HIGH_SEQ CLOCk HP 54201D only HP 54201D only HP 54201D only Example OUTPUT 707 BNC PROBE Query Syntax BNC 2 Returned Format argument crlf Example OUTPUT 707 BNC ENTER 707 Bnc PRINT Bnc HP 54201A D Programming SYSTEM COMMANDS CALibrate command query GAIN or DELay is specified HP 54201A D performs a self cal If LABel is specified HP 54201A D accepts a quoted string up to 64 characters in length that may be used to indicate when the cal was performed when the next cal should be done etc The rear panel cal switch must be set the unprotected position for all of the
225. te Triggering Status Trigger Found TR Trigger Mode State Only State Mode Pod 2 Pod 1 Pod B TTL C TIL TIL Multiplexing aad L 9 a Label Pol 1 Figure 5 4 State Trigger Assignment Menu Setup 5 11 STATE TRIGGER SEQUENCE MENU The state trigger sequence specification determines the conditions under which the state trigger will cause the oscilloscope to trigger acquisition of data With the state trigger Assignment menu setup as specified in the preceding example move the cursor to the Define Assignment field and press the NEXT or PREV key to display the Define Sequence menu 5 12 Trigger Mode Assignment Move the blinking cursor to the Trigger Mode field Press the NEXT or PREV key to cycle through the three trigger mode selections and note the change in the sequence specification In trigger mode State Only the state condition specified will trigger the oscilloscope acquisition In the State Arms Analog mode state conditions and sequences must first be satisfied and then the analog trigger Channel 1 Channel 2 or External will trigger the oscilloscope acquisition In the Analog Only mode state conditions and sequences will Do Nothing as the sequence specification states In the Analog Only mode triggering is totally dependent upon analog inputs as in a conventional oscilloscope The Trigger Mode field is also present in the state trigger Assignment menu Return the Trigger Mode
226. te in the sequence specification can be defined to search for up to 59999 missing bits The J clock is used to define the reference time interval or cell for which a missing or extra bit will be checked The serial data is input as the L clock 5 19 HP 54201A D State Triggering Extra Bit Mode This mode predefines the last state in the sequence specification to detect an extra bit in a string of serial data and triggers the acquisition A reference clock provided by the user is compared with the input serial data There must be one data bit transition in the serial data within each reference clock cycle If more than one data bit transition occurs within any reference clock cycle the HP 54201D triggers on the extra bit When in this mode the last state in the sequence specification can be defined to search for up to 59999 extra bits As in the Missing Bit mode the J clock is used to define the reference time interval or cell for which a missing or extra bit will be checked The serial data is input as the L clock CLOCKS Three ORed clocks operate in a single phase or two phase demultiplexing mode Clock edges can be selected as positive negative or both positive and negative for each clock Different edge selections may be made on the same clock if it is used in each phase of the multiplexed mode The specified clock edge determines when the data on the state channels is clocked into the instrument for trigger comparisons POD THRESHOLDS
227. the NEXT PREV key HP 542014 0 Front Panel SYSTEM CALIBRATION SUBMENU Figure 3 5 This submenu allows the user to execute automatic gain offset trigger hysteresis trigger level and delay calibration for channel 1 and channel 2 from the front panel rear panel switch protects the calibration factors from inadvertent changes This CAL switch must be set to the UNPROTECTED position before execuling automatic calibration Error message Cal RAM Write Protected will be displayed if calibration is attempted with the switch in the protected position tem Specification 5 Acquired Frame ABBES TALK ONLY Execute Calibration J Cals 1 thru 4 Chanl 2 Chand Trigger Level Delay Chanl 5 Chang Defaults Gain Offset amp Trigger 3 Delay Figure 3 5 SYSTEM Calibration Submenu Calibration O calibrates gain offset trigger hysteresis and trigger level tor channel 1 and channel 2 Individual gain and offset calibration for a channel may be executed by choosing 1 or 2 Calibration 3 selects trigger hysteresis and calibration 4 selects trigger level Calibration 5 and 6 calibrates delay for channel 1 and channel 2 Calibration 7 8 and 9 set service default calibration factors A normal calibration would require calibrations O 5 and 6 to be executed Calibrations 7 8 and 9 are used for service setup and would be used after a major repair to the instrument for initial setup procedures Note
228. the HP 54201A D operate The blinking selection cursor is moved to the desired selection field and the NEXT PREV keys are used to roll through the possible selections Numeric selection fields without brackets may be changed using the NEXT or PREV key which act as increment decrement keys or by entering the desired number from the numeric key pad followed by the desired units sec Volt msec mV usec or nsec With a center reference the time range can be changed to a faster value and still keep the reference point at center screen This makes it easy to look at rising or falling edges Using the arrow keys move the blinking selection cursor to the Range selection field The time range is the full scale time from the left side of a graph to the right side of the graph Varying this value has the same effect as the sweep speed control on analog oscilloscopes Press the PREV key to decrement the range value Continue pressing the PREV key until the positive edge can be seen over one to two horizontal divisions figure 4 3 4 2 Timebase TALI fute Scolo MEZIN Peal Time Peference Sanpliag 8 18 5 Graph LET Vedi 2 45 v i Delay 18 0 us dis 52 08 4 2 Status Acquired Frame 00020__ Huto Scale DN Sampling 9 IQ M
229. the output could not be defined as the data transition Data transitions can not be within 20 ns of either cell boundary In this example the falling edge of the output is not in violation of the setup specification Figure 5 15 is a hardcopy output of the input and output signals as acquired by the HP 54201D The top graph shows the ECL input to the translator while the bottom graph shows the TTL output Between each rising edge of the input reference cells the output had one falling edge serial data except for the cell shown between the X and cursors The TTL output was intermittently dropping out for short durations By operating in the missing bit mode the HP 54201D detected the drop out and triggered the oscilloscope on the very next cell boundary rising edge of the reference input top graph center screen Figure 5 16 shows the state trigger assignment menu setup while figure 5 17 shows the sequence specification menu Triggering on this fault requires only the connection of two state pod inputs and the specifying of edges and trigger levels for these two inputs 5 20 Catching the Glitch The HP 54201D can also easily detect and trigger on a glitch by operating in the extra bit mode Figure 5 18 shows an example of an ECL output intermittently glitching high that in the reference cell between the X and O cursors the output has two falling edges The trigger point is at center screen coincident with the second falling edge
230. the screen for each test The service section of this menu executes routines required for servicing the HP 54201 A D Refer to the HP 54201A D Service Manual for detailed information on this function System Specification Status Acquisition Stopped TRLK ONLY IL Test 5 Service 1 Execute Selftest M CPUeMemory Bcquisition Trigger 1 g Input Execute Service Time Null Ext Trigger Null Ext Trigger Hysteresis Hardware Service tu roce c Figure 3 6 SYSTEM Test amp Service Submenu 3 10 54201A D Front Panel 3 7 STATUS Menu we The STATUS menu consists of a tabular presentation of all of the instrument settings threshold definitions and waveform and setup memory allocation STATUS menu has three sub menus Configuration Measurement and Memory as shown in the STATUS menu tree in figure 3 7 STATUS Configuration Setup Label XXXXXXXX Channel Settings Timebase Settings Trigger Settings NS EE andard User Graph 1 Percent T Upper 55 99 Defined Graph 2 Lower 01 45 Graph 3 TTL Graph 4 Volts Upper xxx V V Lower Middle Upper Width AT from f 7 Lower to Middle to Upper to to 1 Middle Width AT from T Lower to Lower Upper to Upper Delay AT Lower Lower Middle Middle Upper Upper emory Setup Memories 0
231. to State Only 5 13 Resource Terms There are four resource terms from which state patterns may be specified a b c and d For each label field specified in the Assignment menu a corresponding column will be positioned next to the resource terms When defining the resource terms each term is an ANDed function of each column For convenience the user may specify the resource terms in any combination of the four value bases hexadecimal binary octal and decimal Move the cursor to the Base field under one of the columns labeled ADDR or DATA and cycle through the four selections by pressing the NEXT or PREV key 5 6 HP 54201A D State Triggering Note An X specifies a don t care state while specifies an undefined state Don t cares in one value base cannot always be translated to another base when this happens a is displayed To make this easier to understand specify the base for each column to be BIN binary ADDR should be 5 bits wide and DATA should be 8 bit wide as previously specified in the Assignment menu For our example assume the DAC address is 11001 and that we desire to trigger the oscilloscope on various inputs written to the DAC while monitoring the DAC analog output with the oscilloscope analog inputs Move the cursor to the field to the right of the resource terms a and specify the ADDR as 11001 by using the numeric key pad Move the cursor to the DATA field of resource term a
232. tput of the generator to the channel two input Preset the HP 54201A D to known conditions by holding any key down and powering up the instrument Hold the key down for about three seconds Press the STATUS menu key on the HP 54201A D then using the field arrow keys move the blinking selection cursor to the Channel Coupling impedance field Press the NEXT or PREV key to change 1 to 50 for both Input 1 and Input 2 Get a waveform on screen by pressing the AUTO SCALE key figure 4 1 Status Hequired Frame 00201 TALE eL Graph LET Vow 2 49 V 1 18 0 use dis _ 0 008 Figure 4 1 HP 54201A D Front Panel Exercises 4 3 LOOKING AT WAVEFORM EDGES The instrument is currently triggered on a positive edge of the square wave To look at this edge in greater detail move the trigger point from the left edge of the screen to center screen First press the TIME menu key next using the FIELD arrow keys move the blinking selection cursor from the Mode selection field to the Reference selection field Press the NEXT key to change the reference from Left to Center figure 4 2 The reference field places the reference point trigger plus delay at the left edge of the screen at center screen or at the right edge of the screen Since the delay equals zero right now the reference point is the trigger point This is an example of how all the controls of
233. trols all Y axis oscilloscope functions including the type of data to be acquired Display controls how waveforms cursor data and text is displayed and written on the screen Graph allows the user to define the graph source define graph specific measurement criteria when measurement mode is defined and perform X axis windowing Measure provides access to front panel and special function waveform measurements State available only on HP 54201D Provides a means to program the state trigger function Timebase controls all X axis oscilloscope functions Trigger controls all analog trigger oscilloscope functions Waveform provides access to waveform data including active data from channels as well as static data from waveform memories 8 1 HP 54201A D Programming Subsystem commands may be issued once a Subsystem has been selected For example once the timebase subsystem has been Selected any timebase command may be issued This tree Structured approach to instrument control offers several advantages the programmer Equivalent functions appearing in several subsystems may be programmed with the same syntax once the appropriate subsystem is selected For example CHANNEL1 COUPLING DC 2 COUPLING DC TRIGGER SOURCE EXTERNAL COUPLING DC WAVEFORM SOURCE MEMORY1 COUPLING DC Generally the tree structure allows more rapid instrument configuration For best performance select a subsystem and make all setting ch
234. uctions are for use service trained personnel To avold dangerous electric shock do not perform any servicing unless qualified to do so oBEFORE SWITCHING ON THE INSTRUMENT the protective earth terminal of the instrument must be connected to the protective conductor of the mains powercord The mains plug shall only be inserted in a socket outlet provided with a protective earth contact The protective action must not be negated by the use of an extension cord power cable without a protective conductor grounding Grounding one conductor of a two conductor outlet is not sufficient protection olf this Instrument Is to be energized auto transformer for voltage reduction make sure the common terminal connected to the earth terminal of the power source interruption of the protective grounding conductor inside outside the instrument or disconnecting the protective earth terminal will cause a potential shock hazard that could result in personal injury o Whenever it is llkely that the protection has been impaired the Instrument must be made inoperative and be secured against any unintended operation fuses with the required rated current voltage and specifled type normal blow time delay etc should be used Do not use repaired fuses or short circuited fuseholders To do so could cause a shock or fire hazard Do not operate the Instrument in the presence of flammable gasse
235. uest System command is used to specify the request mask Query Syntax STAtus Returned Format STAtus lt NRI gt Example OUTPUT 707 STATUS ENTER 707 Status PRINT Status 8 40 HP 54201A D Programming SYSTEM COMMANDS STAtus cont The Upper Byte of the Status Word The Ready Byte The ready byte of the 16 bit status word is defined as follows BIT MASK READY BIT CONDITION WEIGHT 1 14 16384 Cal High indicates that self calibration has completed execution 8192 Test High indicates that the requested self test has completed execution 12 4096 Hard Hardcopy complete High indicates that the last byte of printer or plotter dump has been sent and received 11 2048 Data Data available High indicates that something is in the buffer waiting to be read 1024 Acq Acquisition complete High indicates that all waveforms are acquired Trig Triggered High indicates that the instrument is receiving triggers Can only be set while running if stopped reflects status previous to stopping Parse Parse complete High indicates that the last command has been completely parsed 8 41 HP 54201A D Programming SYSTEM COMMANDS STAtus cont The status byte of the 16 bit status word is defined as follows The Lower Byte of the Status Word The Status Byte STATUS BIT CONDITION WEIGHT MSG High indicates that a message was displayed
236. ulation erases the graph after 64 acquisitions Cursors operate on envelope waveforms but not accumulation waveforms front panel auto measurements except Vmin operate on the maximum array of an envelope Cursors and auto measurements operate on the last acquired frame when in the accumulate mode Disable the accumulation mode Restart the acquisition by pressing ERASE then enter 1 in the Erase Graph field Observe timing jitter by changing the frequency of the signal from 35 kHz to 30 kHz in 1 kHz increments figure 4 29 Go to the CHAN menu and change the Channel 1 store mode from Envelope back to Normal Change the generator signal back to a 35 kHz square wave Channel Graph 1 58 vediv Status Required Frane 00803 TALI ONLY futo Scale Store Node Coupling 5 58 v 18 0 us div 8 088 1 gt __ s Chsore MEN Fange Graph _ Figure 4 26 Status Acquired Frame 00214 TALK ONLY Coupling 0 2 50 V 10 0 wsdiv 9 000 s 1 JEN IN JON A WV V Display Graticule Type Number of Graphs Connect Dots Graph 1 Figure 4 27 Status Acquired Frame 0158 _ TALK HL Reference Lines Rccumulate Mode Bara Filter 58 2 50 V 18 0 2 898 1 Display Gratic
237. ule Type Humber of Graphs Connect Dots Status Acquired Frame 135 TALK ONLY Reference Lines Accumulate Mode Data Filter 18 2 Graph 1 58 1 Figure 4 29 4 20 SINGLE SHOT CAPTURE To demonstrate a single shot capture first go to the TRIG menu and change the trigger Source from channel 2 to channel 1 Next go to the TIME menu and change the Mode from Auto to Single and the Reference from Left to Center Changing the reference from left to center allows the entire first pulse to be seen Disconnect the channel 1 input and press RUN STOP the instrument is now waiting for a trigger figure 4 30 Reconnect the input and the instrument will capture and display one acquisition figure 4 31 4 21 TRIGGERED MODE Change the timebase mode to triggered Trig d and press RUN STOP Disconnect the channel 1 input and notice that the last acquisition stays on screen figure 4 32 This is useful when probing as the last acquisition remains on screen when the probe is lifted Reconnect the input and the display starts updating again 4 22 AUTO MODE Change the timebase Mode to Auto and disconnect the the channel 1 input This time the instrument continues sweeping without a trigger to show where the voltage of the input is figure 4 33 Reconnect the input HP 54201A D Front Panel Exercises lode Pange Detay
238. urned Format MSG lt NR1 gt lt crif gt lt string gt lt crif gt Example OUTPUT 707 MSG NUMBER ENTER 707 Message PRINT Message Device Dependent Message Codes MSG NO MESSAGE STRING 1 Power Up Complete 6 Expansion Limit Reached 7 No Waveform Exists 12 Enter Hardware Test 14 End of Waveform 26 INSERT to Add Sequence Term 27 INSERT to Add OR d Pattern 28 INSERT to Add New Label 29 One Required For Each Label 32 Each Label Must Have a Name 33 All Names Must Be Unique 34 At Least 1 Clock Edge Required 35 Delay Rounded 36 Enter 55 to 99 37 Enter 1 to 45 38 DELETE to Remove Field 41 INSERT to Add AND d Pattern 42 Only One Label Allowed 45 Command Ignored 46 Coupled Function Changed 47 Offset Trig Will Change 48 INSERT Proceed Else CLEAR ENTRY 50 Enter Cal 0 thru 9 51 Enter Test 0 thru 2 52 No Edge Found HP 54201A D Programming SYSTEM COMMANDS MSG cont MSG NO MESSAGE STRING 55 Hardcopy in Progress 56 Acquired Frame lt gt See Note 57 Hardcopy Device Down 59 No Ext Trig Auto 60 Hardcopy Aborted 62 Enter Service O thru 3 63 Waiting to Send Data 64 Waiting to Receive Data 65 Mode Configured in Status Menu 66 Executing Autoscale 67 Exceeds Graph Scale 68 Enter Address 0 thru 30 69 Default Complete 71 Slow Trigger 72 Armed by State Trigger 73 Trigger On State Only 74 Enter Graph 1 thru 4 75 Enter Memory 0 thru 3 76 Auto Scale Disabled 77 Offset Trig Rounded
239. ut 2 optional for this query Query Syntax HELP Returned Format HELP lt string with imbedded crlf s gt Example OUTPUT 707 EOI ON DIM He1p 2000 OUTPUT 707 HELP ENTER 707 USING K Help PRINT USING K Help ID query Query which returns model identification string HP 54201A or HP 54201D Query Syntax ID Returned Format 10 HP 54201A lt crif gt ID HP 54201D cr1f Example OUTPUT 707 ID ENTER 707 Id PRINT Id 8 24 HP 54201A D Programming SYSTEM COMMANDS _ query Query which returns the code of the first key pressed in the key buffer A key queue of length 10 is held If more than 10 keys have been pressed the most recent key is the last in the buffer Query Syntax KEY Returned Format KEY lt key code gt lt crlf gt Example OUTPUT 707 KEY ENTER 707 PRINT CODE KEY CODE 1 1 NEXT 34 CHS 87 B 2 PREV J FINE 35 Not assigned 68 3 4 FIELD 36 Not assigned 69 D 4 FIELD 37 sec Volt 70 E 5 FIELD 38 msec mV 71 6 FIELD 39 usec 72 G 7 lt CURSOR 40 nsec 73 H 8 CURSOR 41 Not assigned 74 1 9 CURSOR 42 Not assigned 75 J 10 CURSOR 43 76 K 11 SYSTEM MENU 44 SAVE 77 L 12 STATUS MENU 45 RECALL 78 M 13 DISPLAY MENU 46 COPY 79 N 14 TRIG MENU 47 ERASE 80 15 CHAN MENU 48 Not assigned 81 P 16 TIME MENU 49 9 82 17 RUN S
240. ved by the instrument It is a binary deta string that contains a condensed coding of the entire instrument state The Learn String is described later in this section and in the descriptions of the SETup and SETup programming commands in section 8 of this manual HP 54201A D Remote Control 7 15 RECEIVING THE DATA MESSAGE The HP 54201A D responds to Data messages when it is in the remote mode REN control line true and is addressed to listen 7 16 Input Data Message Format Input Data messages contain a string of device dependent commands program commands and an End of String EOS message The program codes within a Data message are executed after the EOS message is received The following format rules must be observed for all input Data messages linefeed lt LF gt or an EO are used as the End of String EOS message Each Data message must be terminated by a lt LF gt or by asserting the EO bus signal line with the last byte in the message The carriage return character CR is not required before LF Preceding LF CR is treated as no operation and may be repeated as many times as permitted by the maximum string length limitation When several program commands are sent in a Data message a semicolon preferred or Space must be used to separate each program command from each other Multiple arguments for a command must be separated by commas The maximum length of a Data message is 2
241. xample DIM Slave 50 OUTPUT 707 SLAVE ENTER 707 Slave PRINT Slave 8 104 HP 54201A D Programming STATE SUBSYSTEM DATA command query Command sets the clock polarity for the serial data clock in extra or missing bit modes Query returns the serial data clock setting used in extra or missing bit modes Command Syntax DATA lt L clock spec gt lt L clock spec gt NEGative 0 POSitive 1 BOTH 21 DISabled 3 Example OUTPUT 707 DATA BOTH Query Syntax DATA 7 Returned Format DATA L clock gt lt 1 gt Example OUTPUT 707 DATA ENTER 707 Data PRINT Data REFerence command query Command sets the clock polarity for the reference cell clock used in extra or missing bit modes Query returns the reference cell clock setting used in extra or missing bit modes Command Syntax REFerence lt J clock spec lt J clock spec gt NEGative 0 POSitive 1 BOTH 12 DiSabled 31 Example OUTPUT 707 POSITIVE Query Syntax REFerence 2 Returned Format REFerence J clock gt lt 1 gt Example OUTPUT 707 REFERENCE ENTER 707 Ref PRINT 8 105 HP 54201 0 Programming STATE SUBSYSTEM eee POD command query Command sets the threshold for the Specified pod TTL and ECL are presets lt NR2 gt has the range 9 9 to 9 9 volts Query returns the settings for the specified pod ECL and TTL are returned

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