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Tektronix 710A User's Manual

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2. 3 31 AliasiDQ osi ee Rone os reer 3 32 Setting Sample Interval 3 33 i TABLE OF CONTENTS cont Section 3 OPERATING INSTRUCTIONS cont Page Roll Display Mode 3 34 External CIOCK 42s Sains e 3 34 Reset Hold Function 3 34 HOLD NEXT HOLD IMMEDIATE STATUS wes puedas d s 3 36 HOLD STATUS SETTING 3 36 RECORDING v bre t reco wes 3 37 Record Length and Location bein eee Sample Rate Switching At Bteakpotnte iii cian whe ote oe 3 38 SETTING BREAKPOINTS 3 38 DISPLAYING AND CLEARING BREAKPOINTS 2 55 ess 3 39 Average Mode 0 3 40 Auto Advance Mode 3 40 Envelope Mode 3 44 CONTROL S eani x ORE EEUU 3 43 Cursor Operation 3 43 Cursor Measurement 3 43 Waveform Display Control 3 44 HORIZONTAL ZOOMING 3 44 DOT LINE DISPLAY MODE 3 45 VERTICAL ZOOMING 3 45 _ VERTICAL POSITIONING 3 46 YT XY Display 2S cers fe aos estes 3 46 INET Os os owe doc Alm x 3 46 MAKING COPIES WITH OUT A CONTROLLER cs aise swe 3 47 REAR PANELS 25 eee ar rer ee 3 47 TRIG D OUT EXT ARM IN Connec tors Serial Operation 3 47 CLOCK OUT EXT CLK IN Parallel Operation vais caveavoneet 3 48 SIMPLE WAVEFORM OPERATIONS 3 49 Repetative Waveform Acquisition 3 49 Transient Waveform Acquisition 3 49 Waveform Acquisition with a Breakpoint sea he tes ees 3 50 Cursor Measurements on Acquired Wavef
3. 6397 43 7290 8 3 35 Operating Instructions Pressing the RESET HOLD key during data acquisition causes its indicator to iluminate data acquisition to stop when the record is filled and the HOLD status to be set HOLD NEXT HOLD IMMEDIATE STATUS If the sam pling rate is fast acquisition occurs in the designated loca tion and the HOLD status is set after acquisition completion If the sampling rate is slow there are two HOLD status choices available HOLD Next and HOLD Immediate The first press of the RESET HOLD key causes its indicator to begin blinking and sets the HOLD Next status In this sta tus waveform data is acquired into the designated location and the HOLD status is set after acquisition completion If the RESET HOLD key is pressed again while its indicator is blinking the HOLD Immediate status is set in this status the acquisition is halted immediately and the HOLD status is set HOLD STATUS SETTING Since acquired data would most likely be altered whenever the Sample Mode Record Length or Record Location is modified the HOLD status is automatically set whenever one of these functions is changed Other conditions that will set HOLD status are When the trigger mode is SGL and one acquisition has occurred When the trigger mode is either COMP IN or COMP OUT and the compare results match with the reference conditions After the HOLD status is set acquisition is resumed by pressing th
4. P6106A PROBES Option 1V adds two 2 Tektronix P6106A probes These are 2 m dc to 250 MHz 10X modular probes with auto matic readout pin BNC connectors OPTION 1V 620 MONITOR Option 1P adds a standard Tektronix 620 Monitor wit three 3 BNC coaxial cables i TV TRIGGER OPTION OPERATING INFORMATION The TV trigger option which can be impiemented on the front panel of the RTD 710A or over the GPIB provides additional trigger circuits for obtaining a more stabile display of TV signals TV Option Keys When the TV option is added a number RTD 710A func tions whose names are identified on the front panel but not activated are made operational These are the TV CLP se lection on the Input COUPLING toggle key the TV LINES FLD1 and FLD2 selections on the Trigger COUPLING tog gle key and the FIELD LINE feature on the TRIG LEVEL 2 key l l TV input Coupling The TV CLP input coupling function removes hum and tilt and provides a stable TV signal waveform display If the input signal of CH is neither a composite video nor a com posite sync or a trigger is not generated with TV sync then the TV CLP operation may not stabilize Also if the Trigger SLOPE is not set to match the sync pulse polarity of the input signal it may not stabilize See Trigger SLOPE for TV COUPLING below Trigger Siope for TV Coupling The Trigger SLOPE function operates differently with the TV Trigger COUPLING functions than with
5. lesse sse 5 28 Simple Waveform Data Transfer REMOVAL REPLACEMENT AND using Binary Format CLEANING PROCEDURES es D 1 to the Controller isses 5 29 AR PETERS se Amaia as D 1 Binary Format Block Transfer Removal cs cie eme Son D 1 of Waveform Data 5 30 Cleaning cue enr eds D 1 Arbitrary Format Block Transfer Replacement sss D 1 of Waveform Data 5 31 TOP BOTTOM AND SIDE Waveform Data Transfers CABINET COVERS 2t Ievs D 1 to the RTO 710A 2 esso 5 31 Removal i c c we se D 2 Using the REPeat Command 5 32 Replacement 06 D 2 Saving Recalling RIGHT SIDE CABINET Front Panel Settings 5 33 COVER CARRYING HANDLE D 2 Displayed Cursor Removal D 2 Position Subprogram 5 33 Replacement 4 D 3 Initiating a HP GL Plot l POWER SUPPLY MODULE D 3 From the Controller 5 34 removal asee bacs PARC D 3 Section 6 OPTIONS Replacement D 4 INTERNAL JUMPER SELECTORS D 5 OPTIONS A1 A5 0 0 00 0 ee 6 1 LINE VOLTAGE SELECTOR D 5 OPTION 05 TV TRIGGER 6 1 CRT MONITOR OUTPUT OPTION 19 BLANK FRONT PANEL 6 1 JUMPERS duro a se th aps ves D 6 OPTION 1P P6106A PROBES 6 2 EXTERNAL ARM SIGNAL OPTION 1V 620 MONITOR 6 2 JUMPER I o rv RIP TRAGE AA D 7 TV TRIGGER OPTION OPERATION 6 2 RACKMOUNTING INTRUCTIONS D 9 TV Option Keys eene 6 2 RACKMOUNT COMPONENTS D 9 TV input
6. 1 Connect a signal generator to the CH1 or X BNC im put connector and set it for a 50 KHz 0 5 V sine wave 2 Press the INIT key twice to initialize the RTD 710A 3 Press the RESET HOLD key to set the HOLD status 4 Press the CH1 INPUT or X RANGE key and when its indicator blinks use the Parameter Entry Knob to set the range voltage to 1 V 5 Press the SAMPLE INTERVAL key and when its indi cator blinks use the Parameter Entry Knob to set the sam pie interval to 200 ns 6 Press the RESET HOLD key and when the RESET status occurs the waveform will be acquired and continu ously displayed on the CRT monitor 7 Channel 2 aiso may be displayed on the CRT monitor even though no waveform data is being input This display can be removed by pressing the DISPLAY LOCATION key twice turning on the CH2 DISPLAY indicator then turning the Parameter Entry Knob to set a display location of zero 0 8 The ARM D and TRIG D lamps should be repetitively blinking at this time to show that waveform data is being continuously acquired By changing the ARM DELAY value the repetition period can be varied When the acquisition of one cycle of waveform data and the observation of the waveform measurements is going to be lengthy increase the ARM DELAY The bright dot displayed close to the left edge of the display indicates the trigger point RTD 7104 Instruction Manual Operating Instructions 9 If the waveform is going t
7. Argument MODe DELay MODe DELay Argument ONE TWO SCRol POS1 POS2 ONE TWO SCRol POS1 POS2 Link Argument INT EXT NRx Table 5 4 Cont TRIGGERING GROUP Description Selects the arming signal source Sets the trigger arming delay value NRx 20 or 10 ms to 10 s in a 1 2 5 sequence lf NRx is illegal it is truncated and limited to a legal hardware setting and a warning SRQ is issued if EXW is on When queried the value is NR3 Reports the selected trigger ARM settings DELay value is in NR3 format i Reports ali trigger ARM settings Example response ARM MODE INT DELAY O OE 0 Table 5 5 CURSOR AND DISPLAY CONTROL GROUP Link Argument DISP1 DISP2 OFF DISP1 DISP2 OFF Align INDep NRx lt NRx gt Description Enables cursor 1 on CH1 display Enables cursor 1 on CH2 display Disables cursor 1 Enables cursor 2 on CH1 display Enables cursor 2 on CH2 display Disables cursor 2 Selects cursor scroll mode Align locks CH1 and CH2 dis plays together during scroling using cursor 1 INDep allows scrolling on one display channel while the other remains locked Specifies the location of cursor 1 on the display lt NRx gt TRigger DELay to end of memory segment end of memory segment TRigger DELay LENgth NRx If lt NRx gt is illegal the number is truncated or limited to near est legal value an
8. When coupling is switched from FLD 1 to LINES the displayed line number is erased MODE A toggle key that selects the operating mode of the trigger circuit The selected trigger mode is backlighted above the switch Each mode is 985 scribed below AUTO Recording free runs in the absence of a trig gering signal for recording the baseline Permits trig gering on signals with repetition rates of more than approximately 50 Hz NORM Recording is initiated at the trigger event foilowing the arm event RTD 710A instruction Manual SGL A recording occurs when triggered After completing a recording the instrument enters the HOLD state and displays the acquired waveform Recording cannot be restarted unti the RESET HOLD key is pressed to reset the HOLD state or HOLD RESet is sent over the GPIB COMP IN Recording is continuous using the NORM trigger mode until all acquired waveform data is within the range determined by the reference waveform The reference waveform should be envel oped data The last memory location is automati cally assigned to the reference memory in this mode COMP OUT Recording is continuous using the NORM trigger mode until part of the acquired wave form data is out of the range determined by the ret erence waveform The reference waveform should be enveloped data The last memory location is automatically assigned to the reference memory in this mode When the compare mode is sele
9. 200 GET H FROM 80 65 STA 400 C0U 2048 BFO RTD 710A Instruction Manual Programming Command Set 210 IFDTM 80 PAK HBF 220 GET W FROM 60 65 230 IFDTM 80 UNP 240 GET CS FROM 60 65 250 END Program Explanation 150 Load the interface driver 160 Create curve data array H and waveform data array W 170 Send DATA command to set channel to CH1 location to 1 start to 400 count to 2048 block format to arbitrary block size to 2048 180 Send CURVE query 190 Set interface to accept unpacked binary data 200 Get and store H curve data 210 Set interface to accept packed high byte first binary data 220 Get and store W waveform data 230 Set interface to accept unpacked binary data 240 Get checksum 250 End of program Waveform Data Transfers to the RTD 710A The next two examples generate a reference sine wave of 2048 points then transfer it to record location 2 of CH1 See Section 4 of the RTD 710A Instrument Interfacing Guide for more examples 4041 BASIC Example 100 110 RTD 710A Waveform Receive program Array 120 Iwfm contains sinewave data 130 Send a waveform to CH Location i 140 Start 0 Count 2048 block format binary block size 2048 150 150 170 Init all 180 Integer status adrs event i iwfm 2048 190 Open 1 GPIBO pri l eom lt 0 gt tra fast 200 On srq then call srqhdir 210 Enable srq 220 Print BUILDING WAVEFORM TO SEND 23
10. Fable D 2 NM es ia 5 3 Time Base and Recording Group Fable 6 3 wind conte dude oyu ged 6 5 4 Triggering Group Table 5 4 5 8 Cursor and Display Control Group Table 5 5 PHENOM 5 10 Waveform Parameter Measurement Group Table 5 6 icin oo bu xA 5 12 Waveform Transfer Group Table 5 7 ya ceeds esee ax es 5 13 Calibration Group Table 5 8 5 16 Self Test Group Table 5 9 5 16 Utility Command Group Table DoTU voa Eno oo sen woe 5 18 Device Trigger Group Table 5 11 5 19 Initialization Group Table 5 12 5 20 WiNdow and DATa Settings XTable 5 12 1 ios Vet nak aa 5 20 RTD 710A instruction Manual TABLE OF CONTENTS cont Section 5 PROGRAMMING COMMAND SET cont Page Section 6 OPTIONS cont Page Service Request Contro Group PAL SYSTEMS 45 6 3 Table 5 1 sci ead ee een bes Sy 5 21 Example of TV Signal Event Query Group Table 5 14 5 21 Measurements 005 6 4 internal Waveform Analysis Group Table 5 15 coesa era PEN 5 22 Appendix A SRQ STATUS BYTES AND EVENT WAVEFORM TRANSMISSION 5 25 CODES OVGrVIBW iw iets ora oer 5 25 Waveform Preamble 5 25 MT DEL po e e AE AES CURVe CURVe Command 5 25 EVENT CODES KA WAVfrm Command s rR M rs DEEST ES j Repost Command LLII 8g APpendix B SPECIFICATIONS MED aa Ei ias MUN E Appendix C ASCII amp GPIB CODE CHART Set Query Commands and Appendix D SERVICING INFORMATION Responses
11. Shipping Approx 29 5 Kg 65 0 Ibs Cooling l Forced air circulation Internal airflow is approx 1710 liter per minute 58 3 ctm Finish Earth brown vinyi ciad material on an aluminum cabinet l B 10 i RTD 710A instruction Manual Specifications Table B 4 TV TRIGGER OPTION 05 SPECIFICATION Characteristic Performance Requirement Supplemental Information NOTE Electrical characteristics for the RTD 710A Option 05 are the same as for the standard instrument except as shown in this table VERTICAL SYSTEM CHANNEL 1 AND CHANNEL 2 TV Back Porch Clamp CH 1 only 60 Hz Attenuation Greater than 18 dB Back Porch Reference Within 25 of full scale of ground reference l TRIGGER SYSTEM Sync Separation l NEL Stable video rejection and sync separation from sync positive or sync negative composite video 525 to 1280 lines 50 or 60 Hz interlaced or noninterlaced Trigger Modes Selectable by the COUPLING switch Lines i Time base triggers when holdoff time has elapsed and a TV horizontal line sync occurs Field 1 Time base triggers on the first fieid of the TV signa input l Line Selection Range Tto N m N number of lines per frame lt 1280 Fieid 2 Time base triggers on the second field of tne TV signal input Line Selection Range 1 to N N number of lines per frame 1280 Minimum input Signal Amplitude for Stable Triggering internal CH1 or CH2 Composite Video 25 of full scale min Compos
12. Use only the power cord and connector specified for your instrument Use the Proper Fuse To avoid fire hazard use only the fuse specified in the in strument parts list A replacement fuse must meet the type voltage rating and current rating specifications required for the fuse that it replaces Do Not Operate in Explosive Atmospheres To avoid explosion do not operate the instrument in an ex plosive atmosphere Do Not Remove Covers or Paneis To avoid personal injury the instrument covers or panels should be removed only by qualified service personnel Do not operate the instrument without covers and panels prop erly installed RTD 710A instruction Manual SERVICE SAFETY SUMMARY FOR QUALIFIED SERVICE PERSONNEL ONLY The general safety information in this summary is for the protection of service personnel Specific warnings and cautions will be found throughout the manual where they apply and do not appear in this summary Refer aiso to the preceding Operators Safety Summary Do Not Service Alone Do not perform internal service or adjustment of this instru ment unless another person capable of rendering first aid and resuscitation is present Use Care When Servicing With Power On Dangerous voltages exist at several points inside this instru ment To avoid personal injury do not touch exposed con nections and components while power is on Disconnect the power cord before removing protective pan els so
13. cator is blinking use the Parameter Entry Knob to set the sample interval to 200 us This represents the sample inter val from the first breakpoint 512 points to the end of the acquisition l RTD 710A instruction Manual 9 Press the BREAK POINT DISPLAY key This locks the last sample interval so that accidently bumping the Pa rameter Entry Knob won t change it 10 In order to observe the acquisition of the simulated transient waveform the pre trigger mode is used Since the default trigger delay is 400 this places the trigger in the 8 ms area 400 20 us 11 The default trigger source is CH1 but since it is un known whether the leading edge of the transient signal is going to be positive going or negative going set the Trigger SLOPE to BI using the SLOPE toggle key 12 To ensure that the trigger does not misoperate on BI slope set TRIG LEVEL 1 and 2 Press the TRIG LEVEL 1 key and while its indicator is blinking use the Parameter Entry Knob to set the TRIG LEVEL 1 value to 5 Press the TRIG LEVEL 2 key and while its indicator is blinking also set it to 576 13 To acquire the simulated transient waveform set the trigger MODE toggie key 14 To start the acquisition press the RESET HOLD key When the ARM D indicator starts blinking it indicates that the RTD 710A is waiting for a trigger before starting the acquisition 15 Turn on the sine wave generator As soon as the signa meets the TRIG LE
14. i conversion at CURSOR 2 position Operating Instructions The cursor measurement mode is released when the illuminated measurement key is pressed key LED turns off and the Control display changes to show the cursor position Measurement by the T OR AT key and 1 T OR 1 AT key is not possible when using an external clock When the time scales for channels 1 and 2 are different measurement is made using the time scale for the displayed waveform selected by CURSOR 1 Function INPUT TRIGGER TIME BASE RECORDING CONTROL INIT A push to select key with LED used to initialize settings If the INIT key is pressed once LED blinks and then a parameter key is pressed the current setting of the parameter key resets to its default value Pressing the INIT key twice initializes the RTD 710A to the settings shown in Table 3 6 INITIALIZATION DEFAULTS Key RANGE OFFSET VERT MODE BW LIM 20 MHz COUPLING TRIG LEVEL 1 2 FIELD LINE ARM DELAY TRIG DELAY SOURCE COUPLING MODE SAMPLE INTERVAL CLK SOURCE SAMPLE MODE RECORD LENGTH RECORD LOCATION AVE ENV OF TIMES BREAK POINT RECORD MODE CURSOR 1 2 VERT ZOOM DISPLAY LOCATION VERT POSN HORIZ ZOOM SETTINGS SCROLL DISPLAY DOT LIN DISPLAY YT XY MEASURE Default Value 50V 0 DUAL key LED OFF 100 MHz key LED OFF AC both CH1 and CH2 0 1 0 400 INT key LED OFF CH1
15. A poli by the GPIB controller turns off the illuminated key LED and cancels the SRQ The LOCK indicator shows the lockout non lockout state of the RTD 710A ON in the lockout state The REM indicator shows the remote local state of the RTD 710A ON in the remote state MEASURE V OR AV T OR AT and 1 T OR 1 AT Push to select keys with LED When these keys are pressed various types of cursor measurements are automatically made for the waveform currently se lected by the DISPLAY LOCATION key and the measurement results are indicated on the Control display The procedures for measurement differ de pending on whether the cursors are displayed sepa rately or both CURSOR 1 and CURSOR 2 are displayed together In the former case measure ment values are obtained for the cursor position on the displayed waveform in the latter case measure ment vaiues are obtained for the difference between the CURSOR 1 and CURSOR 2 positions on the displayed waveform as shown in Table 3 5 Table 3 5 MEASUREMENTS USING CURSORS Displayed Measurement Measurement Item Cursor Key CURSOR 1 V Voltage reference to ground or at cursor position CURSOR 2 F Time measurement from trigger point to cursor position 4 7 Reciprocal of T frequency is caiculated and displayed CURSOR 1 Voltage at CURSOR 1 posi and tion voltage at CURSOR CURSOR 2 i 2 position AT Time conversion at l CURSOR 1 position time
16. AUTO With AUTO trigger the instrument is triggered by an input signal after the ARM D lamp illuminates If no trig ger is received within 20 ms an internal trigger pulse is gen erated automatically to acquire and display the waveform Because some input waveforms such as recurrent signals of periods longer than 20 ms or single shot waveforms may fail to trigger properly depending upon the arm timing it is preferable to set TRIG MODE to NORM or SGL in such Cases RTD 710A instruction Manual Operating Instructions NORM al With NORM trigger the instrument is trig gered only by an input signal after the ARM D lamp illumi nates The trigger depends upon the trigger level trigger slope trigger source and trigger coupling If no trigger oc curs after the ARM D indicator illuminates check those settings After a NORM trigger occurs and data is acquired and displayed the instrument is re ARM D for another acqui sition This sequence repeats continually until the HOLD status is set by pressing the RESET HOLD key or by re ceiving the HOLD command over the GPIB SGL Single The SGL trigger mode varies with the set ting of the record mode In NORM record mode SGL operates basically the same as the NORM trigger mode except that when the trigger occurs data is acquired and displayed then the Hold status is set In this state the RESET HOLD key must be pushed or the HOLd RESet command received over the GPIB if you
17. COUPLING Trigger DC TRigger COUpling DC SLOPE Trigger a TRigger SLOpe POSitive TRIG LEVEL TRigger LEV1 0 TRigger LEV2 0 TRIG DELAY TRigger DELay 400 ARM DELAY INT 0 ARM MODe INT ARM DELay 0 SAMPLE MODE NORM E SAMple MODe NORm CLK SOURCE INT SAMple CLOck INT SAMPLE INTERVAL SAMpie INTerval 10E 9 RECORD MODE RECOrd MODe NORm RECORD LENGTH 2048 LENgth 2048 RECOrd LOCation 1 RECOrd AVErage 2 RECOrd ENVelope 1 RECORD LOCATION AVE OF TIMES ENV OF TIMES BREAK POINT none DISPLAY LOCATION DiSplay LOCation 1 VERT POSN 0 VPOsn 0 VERT ZOOM 1 VZOom X1 CURSOR 1 OFF p CURSor ONE OFF CURSOR 2 OFF CURSor TWO OFF HORIZ ZOOM 1 HZOom X1 SCROLL ALL CURSor SCRoll ALIgn DISPLAY LINE DiSplay INTerpol LINE YT XY DISpiay MODe YT MEASURE none MEASure lt x gt OFF where X is VOLI TiMe or FREquency RTD 710A Instruction Manual 3 3 Operating Instructions H the instrument initializes to the default settings the 7 segment LED displays have the values shown in Table 3 2 and the keys associated with the values have their LEDs illuminated except CH1 RANGE which is blinking Table 3 2 7 SEGMENT DISPLAY DEFAULT VALUES T t e Hluminated Key Displayed Value CH1 RANGE blinking 50 V CH2 RANGE 50V TRIG DELAY 400 SAMPLE INTERVAL 10 ns RECORD LENGTH 2048 DISPLAY LOCATION 1 CRT MONITOR SETUP When a CRT monitor is used with the RTD 710A review the fol
18. TYPe NUMber DATa LOOp RTD 710A Instruction Manual Programming Command Set Tabie 5 9 Cont SELF TEST GROUP Link Argument Description lt NRx gt Sets data for the test defined by NUMber NRx When queried the value is lt NRx gt for Range setting and NR1 for other settings If lt NRx gt is illegal it is truncated to the nearest legal number ONE Causes the selected self test to run in a loop until the link ar FAIL gument condition is satisfied or a HALt command is received PASs CONt Reports the current TESt setting Number is in lt NR1 gt format Data is in NR3 format for range setting and NR1 for other settings Reports all TESt settings Example response TEST MODE OFF TYPE EXTDIAG NUMBER O LOOP ONE DATA O Starts the self test function selected by NUMber lt NRx gt Any tests in this test hierarchy below the selected number except those requiring operator intervention are run If OPC is ON an operation completion SRQ is issued when the test is finished If a test is unsuccessful an SRQ is issued if INR is on An ERRor query may then be used to retrieve the error code Causes the current test to advance to the next step in the se quence and execute that step If OPC is ON an operation complete SRQ is issued when the step is finished Reports the string of error codes up to 40 that occurred during the last RUN command Zero is returned when there are no errors Stops any test bei
19. cient use of 10 bit resolution requires that RANGE be prop erly selected so that the input signal fits entirely within the range Fig 3 10 through Fig 3 12 show correct adjustment of the RANGE m Fig 3 10 Input range setting too large Input Signal 0 5 V RANGE 1 6 V RTD 710A Instruction Manual Fig 3 11 Input range setting correct input Signal 0 5 V RANGE 500 mV Fig 3 12 input range setting too small Input Signal 0 5 V RANGE 200 mV Overrange CAUTION Exceeding the maximum input voltage specification may damage the instrument RTD 710A instruction Manua Operating Instructions The RTD 710A overrange indicator consists of two illumi nated triangles at the left side of the Input display When a positive input overrange occurs the upward pointing trian gle illuminates and on negative input overrange the down ward pointing triangle illuminates If an overrange in both directions occurs both triangles illuminate The overrange level is set such that on a positive overrange all bits of the A D converted 10 bit digital data are 1s and on a negative overrange all bits of the converted data are Os Once an overrange occurs it continues to be indicated for confirmation during measurements The indicator allows the operator to readily prevent the overrange from occurring without using the monitor The indicator is reset when start ing to write in the waveform memory To clear the
20. is truncated or limited to nearest legal setting and a warning SRQ is issued if EXW is on When queried the value is lt NR3 gt Queries the selected SAMple settings INTerval value is in NR3 format Queries for all SAMple settings Example response SAMPLE MODE NORN CLOCK INT INTERVAL 10 0E 9 RTD 710A Instruction Manual Header Argument RECOrd MODe ENVelope AVErage L OCation RECOrd MODe ENVelope AVErage LOCation RECOrd Programming Command Set Table 5 3 Cont TIME BASE AND RECORDING GROUP Link Argument Description NORm Selects the recording mode AVE AVErage forces a record LENgth of 131072 ADV ADV selects the auto advance mode and forces TRigger ENV MODe NORm if it was INComp or OUTcomp ENV selects the enveloping mode which forces SAMple MODe NORm and TRigger MODe NORm if it was INComp or OUTcomp in ENVelope mode Record Length value is limited to 128 K If 256 K is selected in this mode a warn ing SRQ is issued if EXW is on NRx Sets number of times to envelope lt NRx gt 1 to 16348 in 2 steps An NRx of 99999 causes continuous enveloping unti HOLd ON is received When lt NRx gt is 2 or more the last waveform memory segment is used for enveloped waveform accumulation In this case record location is changed to the last location minus one and a warning SRQ is issued if EXW is on NRx is truncated and limited to a legal number and a warning SRQ
21. key LED OFF DC AUTO 10 ns 1EO for the external clock INT key LED OFF NORM key LED OFF 2048 4 2 1 NONE NORM 400 1 1 0 4 1 SAVE LOC RECALL LOC keys ALL key LED OFF LINE key LED ON YT key LED OFF LEDs of V or AV key T or AT key 1 T OR 1 AT key OFF i 1The cursor position is reset to the left end point of the waveform memory When the waveform data was acquired with a trigger delay l of 400 the left end point of the waveform memory is 400 in this case the cursor position is reset to 400 The current memory location is initialized to 1 but the recorded contents of the non volatile memory are not erased 3 18 RTD 710A instruction Manual MON CAL A push to select key with LED Pressing this key with the time base set to HOLD mode MON CAL LED turns on outputs a pattern signal at the rear pane CRT monitor output connector This pattern is used for adjustment of the monitor display The pat tern signal output stops when this key is pressed again If the time base is not in HOLD mode this key has no effect PLOT A push to select key with LED Pressing this key LED on outputs the waveform data for the location selected by the DISPLAY LOCATION key to an HPGL plotter connected to the IEEE 488 Port The key LED remains on during output CONNECTORS AND POWER Refer to Fig 3 8 for iocation of items 48 through 53 CH 1 OR X and CH 2 OR Y Connectors AN BNC input
22. keys DISPLAY LOCATION VERT ZOOM and VERT POSN for more details DISPLAY LOCATION A push to select key with LED used to select the record location of the waveform memory for display on the CRT monitor Pressing this key once key LED starts blinking allows selection of the display location for the indicated channel by rotating the Pa rameter Entry Knob If the key is pressed a second time while its LED is blinking the channel selection changes and the dis play location for the other channel can be set A display location for each channel can be selected The maximum display location value that can be set corresponds to the maximum record iocation value The display can be turned off by setting the display location to 0 Both CH1 and CH2 displays should be turned off when using Auto Advance to speed up the acquisition VERT POSN A push to select key used to set the vertical position of the waveform to be displayed on the CRT moni tor Pressing this key once LED starts blinking and turning the Parameter Entry Knob changes the verti cal position of the waveform of the selected channel if the key is pressed a second time while the LED is blinking the channel selection changes and the ver tical display position for the other channel can be set l ME HORIZ ZOOM A push to select key that enables horizontal zoom of the displayed waveform When this key is pressed key LED starts blinking rotation of th
23. til AUTO CAL is complete For details refer to Auto Calibration in the Instrument Familiarization subsec tion of this section 3 7 Operating Instructions TRIGGER Refer to Fig 3 4 for location of items 8 through 16 2 m CH OCH x i lt 7 sys ER Qut D a 7M SLOPE ne ii quer C E ri rin LI LJ TRIGGER TRIG n 19 ARM OFLA ge TRIG FLAY ce d E Nt EXT PT ge Titty TRIG SGURCE opm IK OES IT n 7Y i y M 2 ms a JM o pee SNL oa oy PROBE CAL GNO EN TR AN TRH f Fig 3 4 Trigger section of front panel Trigger Display Displays the current values for TRIG LEVEL ARM DELAY TRIG DELAY or FIELD LINE TV Trigger Option 05 only For details concerning the display refer to the following descriptions for those keys 9 TRIG LEVEL 1 TRIG LEVEL 2 3 8 Push to select keys with LED Selection blinking LED enables setting of the amplitude of the TRIG LEVEL 1 and TRIG LEVEL 2 points that trigger the time base When this key is selected rotating the Parameter Entry Knob changes the displayed trigger level Pressing the TRIG LEVEL key while the LED is blinking alternately displays the setting in either or V or mV Refer to the Instrument Familiariza tion subsection for more information With Option 05 TRIG LEVEL 2 displays the field line number for TV signals Refer to the following descriptions for each display unit 9e The default units When the trig
24. value RANge If NRx is illegal it is truncated or limited to a legal hardware setting and a warning SRQ is issued if EXW is on NRx in volt value takes Range value into account If range value or probe attenuation factor is changed and level unit is VOLts level value is automatically changed by formula above When queried the value is NR1 for Percent unit or NR3 for Volts unit NRx TV Option Selects which TV line number from the selected TRigger COUpling field causes the trigger lt NRx gt 1 to 1280 If outside this range a warning SRQ is issued if EXW is on PREfid TV Option Defines where the TV line count starts PREfid line ATFid l i count starts 3 lines before the field sync pulse System M ATFid line count starts at the field sync pulse Nonsystem M This setting forces trigger PORRIG to FLD1 When queried the value is NR1 Reports the selected trigger settings LEV1 or LEV2 value is in lt NRi gt format voltage value is in NR3 format DELay lt points gt value is in lt NR1 gt format lt time gt vaiue is in NR3 format LINe value is in lt NRi gt format Reports all trigger settings Example response TRIGGER MODE AUTO DUNIT POINT DELAY 400 COUPLING DC SOURCE CH 1 SLOPE POSITIVE LUNIT PERCENT LEV1 0 LEV2 O LCNSTART PREFLD RTD 710A instruction Manual 29 Programming Command Set Header ARM ARM ARM Header CURSor CURSor CURSor
25. 400 C0U 2048 BF0 8IN BSI 2048 INTO 60 33 170 PUT CURVE INTO 60 33 180 IFDTM 80 UNP 190 GET H FROM 0 65 200 IFDTM 80 PAK HBF 210 GET W FROM 80 65 220 IFDTM Q0 UNP 230 GET CS FROM 80 65 240 END Program explanation 140 Load the interface driver 150 Create curve data array H and waveform data array W 160 Send DATA command to set channel to CH1 location to 1 start to 400 count to 2048 block format to binary block size to 2048 170 Send CURVE query 180 Set interface to accept unpacked binary data 190 Get and store H curve data 200 Set interface to accept packed high byte first binary data l 210 Get and store W waveform data 220 Set interface to accept unpacked binary data 230 Get checksum 240 End of program 5 29 Programming Command Set Binary Format Block Transfer of Waveform Data The next two program samples perform a binary format block transfer of CH1 waveform data from the RTD 710A to the controller 4041 BASIC Example 100 110 120 130 140 159 160 170 180 190 200 210 220 230 240 250 260 270 280 290 1000 1010 1020 1030 1040 1050 1060 f i i Get CH1 waveform Loc 1 sta 400 cou 8192 bformat binary bsize 2048 Store waveform in arrays iwfm iwfm2 iwfm3 iwfm4 Init all l Integer status adrs event Open fi gpibO priszl eoms 0 On srq then call srqhdir Enable srq Dim hd to
26. 6 b1k1 te 4100 b1k2 to 4100 b1k3 to 4100 b1k4 to 4100 Dim cl to 1 c2 to 1 c3 to 1 Integer iwfmi 2048 iwfm2 2048 iwfm3 2048 iwfm4 2048 Print 1 DAT CHANNEL CHI LOCATION 1 START 400 COUNT 8192 BFORMAT BINARY BSIZE 2048 Input 1 prompt CURVE hd b lk1 c1 b1k23 c2 c3 51d4 Getmem buffer bIK1 using 4194 iwfmi Getmem buffer b1k2 using 162 iwfm2 Getmem buffer b1k3 using 16 iwfm3 Getmem buffer blk4 using 416X iwfm4 End Sub srqhdir Poli status adrs 1 Input adrs prompt EVENT event Print SRQ from address sadrs Status status Print Event code event Resume End Program explanation 150 190 200 210 220 230 240 250 280 290 Set up the environment Create header and data arrays Create checksum arrays Create waveform point arrays Send Data command to setup RTD 710A Query for and store CURVE data Input data and store as binary End of program 1000 SRQ handler performs serial poll and displays 1060 5 30 status SPS BASIC Example 100 REM 110 REM Get a waveform from CHI loc 1 start 120 REM 400 count 8192 block format binary block size 2048 130 REM 140 LOAD GPI 150 PUT DAT CHA CHi STA 400 C0U 8192 BFO BIN 851 2048 1NTO 80 33 160 INTEGER H 8 W1 2047 W2 2047 W3 2047 W4 2047 21 3 J2 3 23 3 170 PUT CURVE INTO 60 33 180 IFDTM 80 UNP 190 GET H FROM 80 65 200 IFDTM
27. 80 PAK HBF 210 GET Wi FROM 60 65 220 IFDTM 80 UNP 230 GET Ci Ji FROM 60 65 240 IDFTM G0 PAK 250 GET W2 FROM 80 65 250 IFDTM 60 UNP 270 GET C2 J2 FROM 80 65 280 FDTM 80 PAK 290 GET W3 FROM 80 65 360 IFDTM 80 UNP 310 GET C3 J3 FROM 60 65 320 IFDTM 80 PAK 330 GET W4 FROM 80 65 340 IFDTM G0 UNP 350 GET C4 FROM 86 65 360 END Program explanation NOTE Lines 180 220 260 300 and 340 set interface to accept unpacked data while lines 200 240 280 and 320 set interface to accept packed data 140 Load the interface driver 150 Send DATA command to set channel to CH1 location to 1 start to 400 count to 8192 block format to binary and block size to 2048 180 Create arrays for header data H and J and waveform data W1 W2 W3 and W4 170 Query for CURVE data 190 Store W1 header data 210 Store W1 data 230 Get W1 checksum C1 and store W2 header J1 250 Store W2 data 270 Get W2 checksum C2 and store W3 header J2 290 Store W3 data 310 Get W3 checksum C3 and store W4 header J3 330 Store W4 data 350 Get W4 checksum 360 End of program RTD 710A instruction Manual Arbitrary Format Block Transfer of Waveform Data The next two program samples perform an arbitrary for mat block transfer of CH1 waveform data from tne RTD 710A to the controller 4041 BASIC Example 100 110 Get a waveform from CHI location 1 start 400 count 2048 120
28. 9 BYTES 8192 BYTES OF DATA 9 BYTES ist BYTE COUNT NOTE 1 FIRST BLOCK WAVEFORM DATA NOTE 2 CHECKSUM FIRST BLOCK 4 BYTES SECOND BYTE COUNT NOTE 1 SECOND BLOCK WAVEFORM DATA NOTE 2 CHECKSUM SECOND BLOCK EO ASSERTED IF TERM SET TO EOI ONLY CARRIAGE RETURN CR AND LINE FEED LF IF TERM SET TO EOI LF Note 1 The byte count reflects the number of bytes being sent including the checksum For each waveform data point the RTD 710A sends two waveform data bytes for the byte count B High Byte and b Low Byte The byte count is determined as follows Byte Count B 256 b Number of data points Byte Count For example if the waveform has 8192 points the byte count reflects sending the high and low waveform data bytes so the byte count equals 16385 8192 2 1 Note 2 Because the RTD 710A is a 10 bit digitizer the waveform data must be sent in two bytes It is sent High Byte h Low Byte I for each data point The following formula reduces the data to a single word Waveform data point h 256 Fig 5 2 Binary block data CURVE ZCXXXXhtlhl hlS lt CR LF Lone nad a 12 BYTES 16384 BYTES 12 BYTES BYTE COUNT o WAVEFORM DATA a MEME OF DATA CHECKSUM EO ASSERTED IF TERM SET TO EO CARRIAGE RETURN lt CR gt AND LINE FEED lt LF gt IF TERM SET TO EOI LF Fig 5 3 Arbitrary block data 5 26 EE RTD 710A Instruction Manual WAVifrm Co
29. A 3 SRQ Status Bytes and Event Codes Event Code Table A 2 cont Instrument Status Execution Warning EXW ON SRQ Status 101 or 117 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 572 573 574 578 579 580 581 582 583 584 Requested Range value was rounded or limited Requested Offset value was rounded or limited Selecting High Speed sampling mode forced vertical mode to CH1 oniy Requested Trigger Level value was rounded or limited Requested Record Length value was truncated or limited Selecting Envelope mode forced record length to 128K or Record Location number was modified to an allowable number or sample mode was changed to Normal l Selecting Dual vertical mode forced the following 1 Record Length to 128K 2 Record Location to an allowabie maximum number 3 Sampie rate from 5 nS to 10 nS 4 Sample mode to normal Selecting Compare Trigger mode forced Record Length to 128K or Record Location number was modi fied to the maximum allowable value Selecting LINES FLD1 or FLD2 forced Trigger Source to CH1 or Trigger slope was set to minus Requested Arm Delay value was rounded or limited Requested TV Line number was rounded or limited Requested Record Location or Auto Advance Location number was rounded or limited Change of Record Length forced Record Location number or Trigger Delay value to a maximum allowable value R
30. Argument ON OFF SELFDiag EXTDiag NRx Description initiates the auto calibration function If an error SRO occurs any command other than TESt causes the error to be ignored and normal operation to resume STArt connects the monitor calibration signal to the monitor output X Y and Z RESet disconnects the monitor calibra ton signal Table 5 9 SELF TEST GROUP Description Enables the self test mode All test commands including TESt RUN ERRor STEp HALt DEPosit EXEcute and FETch are acceptable when MODe is set to ON but not when set to OFF If an attempt is made to select a test command when MODe is off an error SRQ is issued if EXR is on TESt MODe is acceptable at any time Selects the level of self test diagnostics to be run SELFDiag selects the standard power on diagnostics Level 1 EXTDiag selects extended diagnostics Level 2 See TESt NUMber below lt NRx gt indicates the test number within the TYPe extended diagnostics that is to be run If the TYPe is SELFDiag NUMber is reset to O when a RUN command is received lf NRx is illegal an error SRQ is issued if EXR is on and the command is ignored Selects the extended diagnostics test number lt NRx gt 00000 to 99999 defaults 00000 to TESt TYPe SELFDiag More TESt commands on next page RTD 710A Instruction Manual Header TESt TESt TESt RUN STEp ERRor HALt Argument DATa LOOp MODe
31. BOARD 7204 28 Fig D 7 External arm signal jumper location RTD 710A Instruction Manual Servicing Instructions RACKMOUNTING INSTRUCTIONS RACKMOUNT COMPONENTS The rackmount kit contains new Rackmount Side Covers Fig D 8 two rackmount assemblies and mounting hard The Chassis Intermediate and Stationary Sections ware Each rackmount assembly consists of three sections are a matched set and are installed on a specific side a Chassis Section an Intermediate Section and a Station of the instrument and the rack When installing the ary Section Fig D 9 When the kit is received the Chassis new Rackmount Side Covers with Chassis Sections Section of each assembly is already mounted on its associ already installed be sure to install the covers on the ated Rackmount Side Cover and the remaining two sec correct side of the instrument Do not unwrap the In tions are assembied and wrapped together termediate and Stationary sections until ready to in stall them as they may slide apart and become intermixed with each other installing the sections im properly may cause the instrument to slide out of the rack and injure the operator Before installing the sec tions see the Stationary intermediate Section Identiti cation Procedure paragraph 8 32 FILH SCREW BOTTOM FOOT CORNER RETAINER 8 32 FILH SCREW 1 CORNER FRONT BAIL p AP p TRIM STRIP amp RETAINER 6 20 FNH SCREW RACKMOUNT SIDE COVER RAC
32. CH2 RANge UNit OFF set Coupling PRObe CH1 or CH2 Header Argument SAMple MODe CLOck INTerval SAMple MODe CLOck INTerval SAMple 5 4 Link Argument Description Queries the selected CH1 or CH2 vertical settings RANge value is in the NR3 format OFFset value for 96 of full scale is in NR1 format for volts it is in NR3 format PRObe reports probe attenuation factor X1 or X10 Queries the CH1 or CH2 vertical settings except probe at tenuation Example response CH1 RANGE 2 5E 0 UNIT PER CENT OFFSET 0 COUPLING AC Table 5 3 TIME BASE AND RECORDING GROUP Link Argument Description NORm Selects the sampling mode HlSpd forces VMOde CH 1 HiSpd TRigger SOUrce CH1 DiSplay MODe YT If RECOrd MODe ENV HiSpd forces it to RECOrd MODe NORm Trigger delay value and Break Point address may be truncated if setting or value change occurs an SRQ is issued if EXW is on When Normal mode is set sample interval is limited to 10 ns or more INT Selects the sampling clock source EXT forces TRigger DUNIt EXT POint BREakpoint UNitPOint MEAsure FREquency OFF TIMe OFF NRx Sets the sampling rate NRx 5bE 9 to 2E 1 SSCOndS in steps of one for inter nal clock source NRx 1 to 4E 7 points in steps of one for external clock source in normal sample mode NRx 21 to 4E 7 points in a 1 2 4 6 8 sequence for ex ternal clock source in high speed sample mode lt NRx gt
33. COMP OUT the acquired data is compared with the reference data and if any point falls outside the maximum and minimum reference values the acquired data is saved and the Hold status is set otherwise the process of acquisition and sampling is repeated Fig 3 21 Data is acquired only once for comparison in the NOR M al or ENV elope Record Mode If a COMP IN OUT trig ger is selected ENV of times is automatically set to 1 When the record mode is AVE rage the data is acquired the AVE of times and averaged then it is compared When the Input Coupling is set to GND the Compare Trigger Mode is ignored for the channel with its coupling grounded NOTE When using the COMP modes the reference data must be stored in the last memory location The refer ence data must be enveloped data Manual Trigger Once the ARM D indicator illuminates the MAN TRIG key can be pushed to acquire a waveform at any time RECORD LOCATION RECORD LENGTH 16K WORDS RECORD LOCATION 2 ACQUIRED DATA ACQUISITION CONTINUE OR HALT Arm Delay ARM is a control signal that occurs after a predetermined period set by ARM DELAY It allows triggering of the RTD 710A and starts the TRIG DELAY period Since acquisition cannot start until the ARM DELAY period has elapsed it can be used for trigger holdoff to contro the time between acquisitions in the AUTO NORMAL or COMPARE modes ARM DELAY is displayed in seconds on the Tr
34. Cord 2 5 m OPTION 05 TV TRIGGER OPTION Option 05 provides an aid in examining composite video signals With the option installed ail basic intrument func tions remain the same Changes or additions to any control operations are included in the descriptions of the controls connectors and indicators in Section 3 Features of this op tion include a sync separator back porch clamp circuitry and TV trigger coupling modes The option allows the user to trigger on a specific line number within a TV field and provides for sync polarity switching for either sync negative or sync positive composite video signals OPTION 19 BLANK FRONT PANEL Option 19 provides a Remote Control Only through GPIB rackmountable RTD 710A instrument It replaces the standard front panel key and knob controls and 7 segment LED displays with a nearly blank front panel Fig 6 1 The only remaining control is an ON STANDBY power switch with an ON indicator The ARM D and TRIG D indicators remain but are identified as ACQUISITION rather than STATUS All of the standard instrument BNC connectors GND connector and PROBE CAL output remain the same Otherwise the front panel is blank The Option 19 instru ment also has the rackmountable side panels installed and includes the remainder of the rackmount kit as a standard accessory 5387 87 7290 26 Fig 6 1 Option 19 blank front panel RTD 710A Instruction Manual 6 1 Options OPTION 1P
35. ENV OF TIMES key The current number of times for envel oping is shown on the Recording display It can be set between 1 and 16384 in 2 steps or 99999 infinite enveloping with the Parameter Entry Knob During averaging or enveloping the display continu ously shows the number of times for averaging or enveloping if the RESET HOLD key is pressed be fore averaging or enveloping is complete the num ber of averaging or enveloping repetitions that were executed is displayed and the instrument enters the HOLD state NOTE It is not possible to set or change the number of times for averaging or enveloping while the acquisition is in progress Such procedures must be done during the HOLD state BREAK POINT SET A push to seiect key with LED used to set break points When pressed the Recording display shows the current breakpoint location trigger point is 0 To set a breakpoint rotate the Parameter Entry Knob to select location in time or sample number then press the SAMPLE INTERVAL key to lock the breakpoint and display it as a high intensity dot on 3 13 Operating Instructions the displayed waveform Now the sample interval beginning at this breakpoint can be set The effec tive breakpoint range is as follows NORM Sample Mode 16 to record length trigger delay 16 i in mul tiples of 8 sample points Hi SPD Sample Mode 32 to record length trigger delay 32 in mul tiples of 16 sa
36. OPERATION START ENTER HOLD STATUS OUT INTERRUPT LESS THAN 20 ms TRIGGER MODE OTHER THAN SINGLE FRONT PANEL PRESS POWER RESET HOLD ACQUISITION ACQUISITION SWITCH ON BUTTON RESTART END ACQUISITION ACQUISITION END RESTART RTD 710 ACQUISITION OPERATION START CORRECT DATA CORRECT DATA CORRECT DATA INTERRUPT INT INTERRUPT LESS THAN 20 ms LESS THAN 20 ms LESS THAN 20 ms 6397 71 Fig 4 6 A D output operation RTD 710A Instruction Manual 0 47 Section 5 PROGRAMMING COMMAND SET INTRODUCTION The command set is used to control the instrument through the GPIB It can initialize and calibrate the instru ment change its contro settings query the status of the instrument trigger an acquisition query the results of an acquisition transfer waveform data to or from the instru ment call instrument utilities and initiate other instrument functions l Commands follow the conventions established in the Tektronix GPIB Codes Formats Conventions and Features Standard They are specified in mnemonics related to the function being performed and are similar to the front panel contro names U Commands require the proper syntax to be understood but they may be abbreviated variations as long as they contain a minimum number of characters to prevent ambiguity COMMAND FORMAT The command format for all RTD 710A commands is header argument link a
37. RECORD LENGTH 16K OF ad or GF RECORD LOCATION 4 ACQUIRED ACQUIRED ACQUIRED ACQUIRED S DATA DATA DATA DATA 6397 72 7290 33 Fig 3 35 Auto advance representation 3 Use the Parameter Entry Knob to set the desired maximum record location number MAX MIN MAX MIN MAX MIN ai gt a2 a4 a3 a5 a6 NOTE The COMP IN and COMP OUT Trigger MODE cannot be set in the ADVance RECORD MODE If either of these two trigger modes is selected RECORD MODE INPUT automatically changes to NORMAL SIGNAL PEAK DETECTED SAMPLE POINTS Envelope Mode Setting RECORD MODE to ENV elope causes wave SAMPLE form data to be acquired using envelope processing Enve INTERVAL lope processing detects and displays the maximum and minimum peak values of the input signal during designated sample intervals One of the following two sampling meth ods is automatically selected depending upon the number of 6397 48 7204 2 envelopes Fig 3 36 Envelope peak detection RTD 710A instruction Manual 29 3 41 Operating Instructions 1 If the ENV of TIMES is 1 the input waveform signal is sampled at the designated sample interval and each two consecutive samples are compared and in sampie vaiue or der Fig 3 36b 2 If the ENV of TIMES is 2 or more the first acquired data is sampled as in method 1 above and stored in the specified RECORD LOCATION and reference memory loca tion last record of the memory Then on the next and sub se
38. REMOVING THE INSTRUMENT FROM THE RACK To remove the instrument fromthe rack Fig D 14 1 Unscrew the two security screws at the top of the Rackmount Handles if installed 2 Puli out both Rackmount Latch Releases at the sides of the instrument 3 Using the Rackmount Latch Releases pull the instru ment out of the rack enclosure until the Intermediate Sec tion Automatic Latches Lock D 16 In the next step when the instrument is removed from its locked and secured rackmounting position it could drop free and injure the operator Be sure that you have a firm hold on the instrument when removing it or have someone assist you in the removal 4 Press in on both Chassis Section Automatic Latch release buttons and carefully slide the instrument out and away from the rack When the end of the Chassis Sections clear the Intermediate Sections the instrument is free of the rack RACK ADJUSTMENTS After installing the instrument in the rack binding of the rack sections may occur if they are not properly adjusted To adjust the rackmounting hardware 1 Pull the Rackmount Latch Releases to uniock the in strument then continue pulling the instrument about 10 inches out of the rack 2 Slightly loosen the screws holding the lett and right front Stationary Sections to the rack rails 3 Allow the Stationary Sections to seek their norma position 4 Retighten the screws and check the tracks for smooth operat
39. TRIG LEVEL 2 key RTD 710A instruction Manual blinks and the TRIG LEVEL 1 key is disabled The range for line numbers is from 1 to the maximum lines in the TV signal frame or 1280 whichever is less Each subsequent pressing of this key toggles the line numbering protocol between system M and nonsystem M When system M is selected the line count begins three lines before the field sync puise is encountered When nonsystem M is selected the line count begins coincident with the field sync pulse When nonsystem M is seiected the Trigger display indicates a minus sign When the coupling switch is set to LINES both TRIG LEVEL 1 and TRIG LEVEL 2 Field Line keys are disabled i ARM DELAY A push to select key with LED When selected LED blinking the time interval arm delay from one ac quisition to the next can be changed by rotating the Parameter Entry Knob The value of the arm delay can be set from 0 ms to 10 s seconds ina 1 2 5 sequence If the key is pressed while the LED is blinking an E is displayed on the Trigger display and an external TTL signal is used for arming For more information on the external arm signal refer to Appendix B SPECIFICATIONS NOTE Actual arm delay time is affected by the instru ment settings since internal processing time is added to the setting of the ARM DELAY key TRIG DELAY A push to select key Selection LED blinking en ables changing the trigger position wi
40. V age 93 AY aar e S aree re S ati ai n a aaa aan t rer ee MEER UK BS 1363 240V 13A 240 V EC 83 Td s Australian i 6 0 N 40V 10A 240 V as cu 3 PER North American i ANSI 73 20 Ai 40V 15A 240 V NEMA 6 15 P AA 2 NEL d NEC 83 l i Switzerland iom T 25105 220 V SEV i A5 ANSi American National Standards Institute BS British Standards Institution NEMA National Electrica Manufacturer s Association AS Standards Association of Australia JEC International Electrotechnical Commission SEV Schweizevischer Elektrotechischer Verein CEE internationa Commission on Rules for the Approval of Eiectrical Equipment 6397 1 RTD 710A Instruction Manual 2 3 Preparation for Use INSTRUMENT COOLING The instrument can be operated in ambient air tempera tures from 0 to 50 C and stored in ambient tempera tures from 30 to 70 C After storage at temperatures outside the operating limits allow the chassis temperature to reach a safe operating limit before applying power Instrument cooling is provided by forced air drawn in through holes at the rear of the side panels and in the rear panel and blown out through holes in the front portion of the side panels To ensure proper cooling of the instrument allow at least 2 inches clearance more if possible at the sides and at least 3 inches at the rear of the instrument Air filters located
41. as the end of message the instrument terminates its messages with a CRLF and sets EO true The fourth through eighth sections set the instruments address in binary format The address is determined by to taling the values associated with the selected one 1 posi tions For example the switch in Fig 4 2 has the one 1 position selected for the values 1 and 2 giving a total of 3 which represents a primary GPIB address of 3 GPIB INTERFACE COMMANDS Refer to Appendix C ASCII amp GPIB CODE CHART RESPONSES TO INTERFACE COMMANDS Interface Clear IFC When the interface Clear IFC signal line is pulsed true any input to or output from the instrument is interrupted and the instrument enters an unaddressed state This resembles the same action that occurs when the instrument receives the interface message sequence UNT UNL When the in strument is next addressed the operation being performed when the IFC occurred is resumed Device Clear DCL When the Device Clear DCL message is received the following instrument actions occur 1 Command interpreter processing is reset 2 Input and output buffers are cleared 3 All pending SRQ flags except power on are cleared 4 All pending EVEnt query responses except power on are cleared RTD 710A Instruction Manual 5 Any waveform transfers are aborted 6 Any plots under program contro are aborted Selected Device Clear SDC If the instrument is listen addr
42. block format arbitrary 130 140 Init all 150 Integer status adrs event i 160 Open fi gpibOlprizi eom 0 170 On sra then call srghdir 180 Enable srq 190 Dim hd to 12 200 Integer rawdata 4096 wfmdata 2048 chksum 210 Print 1 DAT CHANNEL CH2 LOCATION 1 START 400 COUNT 2048 BFOMAT ARBITRARY 220 Input 1 prompt CURVE hd rawdata chksum 230 For i 2 to 4096 step 2 240 wfmdata i 2 srawdata i 1 256 rawdata i 250 Next i 250 End 1000 Sub srqhdir 1010 Pol status adrs 1 1020 Input 1 prompt EVENT event 1030 Print Status istatus 1040 Print Event event 1050 Resume 1060 End Program Explanation 140 Set up the environment 180 190 Create header array hd 200 Create waveform data arrays rawdata wimdata 210 Send DATA command to set channel to CH1 location to 1 start to 400 count to 2048 block format to arbitrary block size to 2048 220 Query for curve data CURVE and input raw data rawdata 230 Make 10 bits data widata 250 260 End of main program 1000 SRQ handler performs serial poll and displays Status 1060 SPS BASIC Example 100 REM 110 REM RTD 710A Waveform Data Transfer Program 120 REM Data channe CH1 location 1 start 400 130 REM count 2048 hlock format arbitrary 140 REM 150 LOAD GPI l 160 INTEGER H 11 W 2047 170 PUT DAT CHA CH1 LOC 1 ARB INTO 80 33 180 PUT CURVE INTO 60 33 190 IFDTM 680 UNP
43. by the RTD 710A time measurement is performed as CURSOR position recognized trigger position Therefore when measuring the time interval between the actual trigger point and point of interest as desig nated by CURSORT the AT measurement is useful When the input signal is acquired using a 10 ns sam ple interval set the CURSOR2 position to 3 and set the CURSOR position to the point of interest then press the AT key This causes the measurement to be made as CURSOR position CURSOR position where CURSOR 2 is close to the actual trigger point Waveform Display Control The RTD 710A provides a number of display functions such as horizontal expansion and compression vertical ex pansion and compression horizontal positioning waveform Scroll and vertical positioning to make acquired waveform measurements easier These allow any portion of a wave form to be selected with vertical and horizontal positioning then expanded or compressed for more detail An entire 256K waveform record may be compressed and displayed for a quick observation of the entire waveform Also the CRT monitor screen can be split with the CH1 waveform displayed on the upper half and the CH2 waveform dis played on the lower half using vertical compression and positioning HORIZONTAL ZOOMING Horizontal zooming includes both expansion and compression within the 2048 points of horizontal resolution offered by the RTD 710A l Expansion is
44. connectors External signals applied to these connectors are routed to the input attenuators for channel 1 and channel 2 When the XY display mode is selected a signal applied to the CH 1 OR X connector provides the horizontal deflection and a signal applied to the CH 2 OR Y connector provides the vertical deflection Each connector has a coding ring contact that activates the full scale range Operating Instructions switching circuitry when an encoded switching probe is connected If a 10X probe with a readout pin is connected the input display reading is auto matically multiplied by 10 The maximum input volt age is 250 V dc peak ac PROBE CAL Output Connector A pin socket that provides a 4 V p p 1 kHz square wave output signal into a 1 MO load for probe compensation GND Connector Provides an auxiliary signal ground for use when connecting equipment under test to the RTD 710A EXT TRIG IN Connector AN A BNC connector for applying an external trigger signal The maximum input voltage is 25 V dc peak ac Terminated in 1 MQ A BNC connectors that provide straight through con nection to the corresponding TO FRONT PANEL 1 2 and 3 connectors on the rear panel The maxi FROM REAR 1 2 3 Connector mum input voltage is 40 V dc peak ac Power ON STANDBY Switch Turns the RTD 710A power on or to standby if the rear panel PRINCIPAL POWER SWITCH is on 6397 78 7290 4 Fig 3 8 Connector
45. controlled either from the _ front panel or through the rear panel GPIB interface Wave form data may be transferred between the RTD 710A and a controller or other peripheral device on the GPIB interface Maximum data transfer speed on the GPIB is at least 250 Kilobytes per second The RTD 710A mainframe contains a type 68000 16 bit microprocessor to control the pro grammable functions Internal self diagnostics provide ser vice personnel an aid for isolating most equipment malfunctions l To provide for easy systemization of the RTD 710A many of its internal signals such as Clock Out Trigger Out External Clock In and External Arm in are provided at rear panel output connectors l The RTD 710A operates with HPGL compatible digital plotters through the GPIB Plotter contro is either front panel or remote GPIB SPECIFICATIONS Refer to Appendix B Specifications STANDARD ACCESSORIES 1 Power Cord 3 wire 2 5 meter 161 0123 00 2 Fuses 8 A 250 V Medium Blow 1 159 0268 00 4 A 250 V Medium Blow 1 159 0269 00 1 Instruction Manual 070 7204 00 1 instrument Interfacing Guide 070 7207 00 1 1 General Information OPTIONAL ACCESSORIES Option B1 Service Manual Volume 1 070 7292 00 Service Manual Volume 2 070 7293 00 Calibration Kit 067 1376 00 620 Monitor See Tektronix Product Catalog P6106A Probe See Tektronix Product Cataiog GPIB Cable 2 meter 012 0991 00 Rackmounting Kit 016 0886 02 A D Output
46. covers To change the External Arm Signal jumper 1 Remove the top Cabinet Cover 2 Remove the Main Chassis Cover and Circuit Board Retainer see steps 2 through 4 under CRT MONITOR OUTPUT JUMPERS above 3 Remove the ribbon cabie connector from the A30 board and move it aside out of the way 4 Loosen the A32 board by pulling up on the inner ends of the board ejectors J481 J480 Z LEVEL Z POLARITY RTD7IO AS6 GPIB MONITOR BOARD Fig D 6 CRT monitor output jumper locations RTD 710A instruction Manuali Servicing Instructions 5 Carefuily lift the board up out of the chassis about two 2 inches to access the J122 J124 jumper 6 Change the J122 J124 jumpers to the External Arm Signal mode as follows Fig D 7 a Edge Mode 1 2 Jumpered Factory Setting D Level Mode 2 3 Jumpered NOTE Pin 1 is identified with an arrow symbol on the board COSTS tu 7 Reinstall the A32 board AGO board ribbon cable con nector Circuit Board Retainer Main Chassis Cover top Cabinet Cover and Corner Retainers in the reverse order of removal Clock Out Jumper The clock out jumper Fig D 7 allows selection of a di rect mode or divided mode The direct mode outputs either the internal 200 MHz signal or the externally supplied clock when the source is external The divided mode outputs a clock of the same rate as the sampling clock 3122 4124 ARM MODE A34 TIME BASE SUB BOARD A32 TIME BASE
47. from the rear of the instrument Once the cover is inserted install two 6 20 PNH screws supplied with the rackmount kit at the rear of the cover and install the air filter NOTE Remember the right side is identified when facing the front pane of the instrument To identify the right Rackmount Side Cover note that 1 when the Chas sis Section is installed the small notch at the front of the section is located at the top 2 the Automatic Latch is located closest to the bottom of the section when installed Figs D 8 and D 9 and 3 the screw holes in the Rackmount Handies are at the top 7 Reinstali the top trim strips on both sides 8 Reinstall the corner retainers at each of the four rear corners of the instrument INSTALLING THE RACK HARDWARE The rack hardware consists of the Intermediate and Sta tionary Sections Fig D 12 There are two sets of these sections one for each side of the rack Each set is sepa rately wrapped as a matched set in the kit The Stationary Sections attach to the vertical rack rails while the Interme diate Sections fit between the Stationary Sections and the Chassis Sections on the instrument to allow the instument to be extended out of the rack The Chassis Intermediate and Stationary Sections are a matched set and are to be installed on a specific side of the rack When installing the Intermediate and Stationary Sections in the rack be sure to install them on the correct side
48. indicator shows the wrong voltage for the power source to be used refer all changes to qualified service personnel CHECKING THE LINE FUSE To verify the proper value of line fuse 1 Unplug the instrument from line voltage 2 Press in the fuse holder cap and release it with a slight counterclockwise CCW rotation 8 Pull the cap with the attached fuse inside out of the fuse holder l ees 4 Verity the proper fuse value Table 2 1 5 install the proper fuse if required and reinstall the fuse holder cap by carefully pushing it in while turning it slightly clockwise CW Table 2 1 AC VOLTAGE RANGES AND FUSES Voltage Line Voltage Range indicator Line Fuse 115 V nom 90 132 Vac 180 250 Vac POWER CORD 8 A 250 V medium biow 4 A 250 V medium blow This instrument has a detachable three wire power cord with a three contact plug for connection to both the power 2 2 source and protective ground The protective ground con tact on the plug connects through the power cord protec tive grounding conductor to the accessible metal parts of the instrument For electrical shock protection insert this plug into a power source outlet that has a properly grounded protective ground contact This instrument operates from a single phase power source and has a detachable three wire power cord with a two pole three terminal grounding type plug The voltage to ground earth
49. is essentially the same as the transient waveform example above except it will use one breakpoint to examine the first 50 points of data on the leading edge of the waveform in more detail To examine the first 50 points of data the waveform will be expanded 10 times To acquire a transient waveform using a breakpoint 1 Connect a signal generator to the CH1 or X BNC in put connector and set it for a 50 Hz 0 5V sine wave Then turn off the generator 3 50 TRIGGER POINT 7204 18 Fig 3 48 Transient waveform acquisition display 2 Press the INIT key twice to initialize the RTD 710A 3 Press the RESET HOLD key to set the HOLD status 4 Press the CH1 INPUT or X RANGE key and when its indicator blinks use the Parameter Entry Knob to set the range voltage to 1 V 5 Press the BREAK POINT DISPLAY key When its in dicator is blinking verify that the displayed breakpoint ad dress is 0 If it isn t rotate the Parameter Entry Knob to the highest numbered breakpoint Then press the BREAK POINT CLR key until the displayed value is 0 6 Press the SAMPLE INTERVAL key When its indi cator is blinking use the Parameter Entry Knob to set the sample interval to 20 us which will be the sample interval from 0 to the first breakpoint 7 Press the BREAK POINT SET key When its indicator is blinking use the Parameter Entry Knob to set the first breakpoint at 512 8 Press the SAMPLE INTERVAL key When its indi
50. is on CH1 only mode and XY display mode are mutually exclusive Selecting CH1 only mode forces display mode to YT Queries the vertical mode selection Example response VMODE DUAL Enables the 20 MHz bandwidth limiter Queries the status of the 20 MHz bandwidth limiter Example response BWLIM ON Sets the CH1 or CH2 full scale range to lt NRx gt volts lt NRx gt 0 1 500 V in a 28 step sequence of 1 1 25 1 6 2 2 5 3 2 4 5 6 2 8 Range is automatically adjusted to a probe attenuation change Unit is volts NRx is truncated and limited to the nearest fegal setting and warning SRQ is issued if EXW is on When queried the value is lt NR3 gt Selects the units of measure for the CH1 or CH2 input offset Sets the CH1 or CH2 input offset value in of full scale or volts NRx 2 19996 to 199 in 1 steps volts 96 value full scale range The offset automatically adjusts to probe attenuation changes NRx is truncated and limited to the nearest legal setting and a warning SRQ is issued if EXW is on When queried the value is lt NR1 gt for PERcent or NR3 for VOLts Selects CH1 or CH2 coupling TVCiamp cannot be selected for CH2 if TVCiamp is selected and the TV Trigger option is not installed an SRQ is issued if EXR is on and the com mand is ignored Programming Command Set Table 5 2 Cont VERTICAL SYSTEM CONTROL GROUP Header Argument CH1 or
51. loca tion last acquired 2 All data valid Advance count 1 1 Last acquired data in record location 1 2 Depends on the status of previous acquisition Advance count 1 1 All data displayed as 0 since the memory content is cleared prior to acquisiton 2 All data valid Roll Mode i i NOTE When HOLD is set prior to THIG D there is no trigger point therefore the reference point becomes the same point as the display reference point which also becomes the first data point The Ped data can t be sent over the GPIB When HOLD is set after TRIG D the trigger point be comes the point of reference for measurement and the display reference point is the point at where the data write begins RTD 710A instruction Manual Table 3 9 DISPLAY CONDITIONS ARM D TO END OF ACQUISITION Display Record Mode Display Data 2 Display Effectiveness Normal H 1 1 Data written at point of HOLD 2 All data is valid if desig nated location is filled Dy new data If not filled the rest of memory is filled with 0 data Normal 1 Gives average of up to last acquisition 2 All data valid m M M M M M Average count z2 1 Data written in memory at point of HOLD 2 Same as Normal above Average count 1 t 1 Same as Normal above 2 Same as Normal above Advance 1 Gi
52. modes DUAL default value or CH1 ONLY When the CH1 ONLY mode is selected the key LED is on When the key is pressed again the operation mode returns to DUAL and the LED turns off When the sample mode is set to high speed mode VERT MODE is automatically set to CH 1 ONLY If the high speed sample mode is Tfelsased the CH 1 ONLY mode remains set DUAL The channel 1 and channel 2 input signals are simultaneously acquired independently into each channel The minimum sample interval is 10 ns CH 1 ONLY Only the channel 1 input signa is ac quired and saved Full memory of 256K is usable The minimum sample interval is 10 ns When the high speed sample mode is selected the minimum sampie interval is 5 ns This key has priority over RECORD LENGTH HI SPD and TRIG DELAY if VERT MODE is changed from CH 1 ONLY to DUAL when the RECORD LENGTH SAMPLE MODE TRIG DELAY and BREAK POINT parameters and or settings are out side those allowable for dual mode then those pa rameters and or settings are automatically changed to the maximum allowable values BW LIM 20 MHz A push to select key with LED When selected the LED turns on and the bandwidth limit of the input amplifiers are set to 20 MHz When this key is dese lected LED off the bandwidth is 100 MHz The AUTO CAL function executes when the key is pressed AUTO CAL A push to select key with LED When selected the AUTO CAL function executes the LED turns on un
53. ns rate until the pulse reaches its maxi mum amplitude then the sampling interval might be changed to 200 ns for the remainder of the acquisition A sampling interval change is marked whenever a break point is set using the front panel Break Point SET key in local mode or with the BREAKPOINT SET command over the GPIB Breakpoints are displayed and cleared using the Break Point DISPLAY and CLR keys or by using the GPIB commands BREAKPOINT CLEAR and BREAKPOINT commands Breakpoints divide a record location into blocks where each block contains all samples from the specified break point to the next breakpoint or end of record Up to five 5 breakpoints can be set by the user for each waveform ac quisition The first breakpoint unsettable which is not in cluded in the five user settable breakpoints is the trigger point Breakpoints are shown on the display as an intensi fied dot l Setting Breakpoints Breakpoints can be set in either address points or time When BREAKPOINT SET is first selected its value is dis played in points Once the key indicator is blinking pressing the key causes the displayed value to toggle between points and time When an external sampling ciock source is used the time feature for setting breakpoints is not available since the external sample interval is unknown The breakpoint address has a range of from either 16 sample mode NORMAL or 32 sample mode HI SPEED to 524264 or 52
54. number of a contact person type and serial number of the instrument reason for return and a complete description of the service required 3 Completely wrap the instrument with polyethylene sheeting or equivalent to protect the outside finish and pre vent entry of harmful substances into the instrument 4 Cushion instrument on all sides using three inches of padding material or urethane foam tightly packed between the carton and the instrument 5 Seal the shipping carton with an industrial stapler or strapping tape 6 Mark the address of the Tektronix Service Center and also your own return address on the shipping carton in two prominent locations RTD 710A Instruction Manual Section 3 OPERATING INSTRUCTIONS This section is divided into three subsections 1 initial Instrument Setup 2 Controls Connectors and Indicators 3 Instrument Familiarization INITIAL INSTRUMENT SETUP This subsection is divided into these topics Power On Off Self Test initialization CRT Monitor Setup Ss o my POWER ON OFF Power On Before turning on the power for the first time be sure to read the Operators Safety Summary and Section 2 PREPARATION FOR USE To power up the instrument If the instrument has been stored in an environment outside its specified operating temperature or where it has collected moisture do not turn on the power until the moisture is gone and the instrument has sta bilized to an ambient t
55. of CH1 Location 1 STOp Trigger Delay value Record Length value 1 LEVel 512 a i SETting ON GRAtON WAVfrm ON RTD 710A Instruction Manual Programming Command Set Tabie 5 13 SERVICE REQUEST CONTROL GROUP Header Argument Link Argument Description RQS ON Enables all SRQ functions except power on and fatal error OFF RQS Reports the RQS status OVEr ON Enables the Overrange SRQ function Issues a status 193 or OFF l 209 event codes 752 through 755 when on OVEr Reports the OVEr status WRI ON l Enables the Acquisition Complete SRQ function When on the OFF RTD 710A will issue an OPC status 208 and event code 750 WRI Reports the WRI status GER ON Enables the Command Error SRQ function Issues a status OFF 97 or 113 when on CER Reports the CER status EXR ON Enables the Execution Error SRQ function Issues a status 98 OFF or 114 when on EXR Reports the EXR status INR ON Enables the internal Error SRQ function issues a status 99 OFF or 115 when on INR Reports the INR status EXW ON Enables the Execution Warning SRQ function Issues a status OFF 101 or 117 when on EXW Reports the EXW status OPC ON Enables the Operation Compiete SRQ function Issues a status OFF l 66 or 82 when on OPC Reports the OPC status USEr ON Enabies the front panel generated SRQ issues a status 67 or OFF 83 when on USEr Reports the USEr status SRQ Reports the status of all Service Request Grou
56. on each of the display channels It is accomplished by pressing VERT POSN Pressing VERT POSN once initiates vertical positioning pressing it again selects the channel While its indicator is blinking the Parameter Entry Knob can be used to position the display Waveform data is sometimes located off the monitor screen due to vertical zooming and positioning in these cases measurement is possible once the display is adjusted so it is displayed on the monitor screen If the data is lo cated off screen due to an overrange condition it cannot be displayed on the screen by using vertical positioning Proper use of the vertical zooming and positioning func tions permits the user to observe any portion of interest on an acquired waveform with good visibility YT XY Display There are two methods used to display waveform data YT display and XY display The YT display provide a normal time domain display where the X axis displays time and the Y axis displays voltage Fig 3 43 3 46 Fig 3 43 YT waveform display in the XY display the waveform data values for CH1 drive the X axis while the data values of CH2 drive tne Y axis Fig 3 44 6397 56 Fig 3 44 XY waveform dispiay INIT Key The INIT key can be used to initialize an individual front panel control or to initialize all front panel controls simultaneously if the INIT key is pushed once its indicator starts blink ing At that point if another key
57. overrange indicator adjust RANGE and OFFSET until the signa is contained within the input range Fig 3 13 shows the effect of an overranged input signal In this example the display monitor is setup to monitor both channels using the upper half for the CH1 display and the lower half for the CH2 display Then a sine wave of 2 V is input to CH1 and the same waveform attenuated by 1 2 is input into CH2 While the true waveform attenuated ap pears on CH2 the waveform on CH1 is clipped because the input signal exceeds the range of CH1 Fig 3 13 Overrange display 3 23 Operating instructions OFFSET Key Input OFFSET provides a dc offset value as a means to vertically shift the input signal on the monitor screen or to shift part of an overranged input signal within the RANGE Because the dc offset can be set from 1 to 199 of the RANGE it can be used for measuring low frequency compo nents that are superimposed on dc components within this range that may be attenuated with ac coupling To set the Offset 1 Press the OFFSET key for the channel to be set The current OFFSET value is displayed in the Input display 2 Whenever the OFFSET key indicator is blinking the Parameter Entry Knob can be used to set the OFFSET value The available OFFSET is 199 of the input RANGE adjustable in 1 steps OFFSET can be set in either of full scale or the equiva lent voltage value in 1 steps Once the OFFSET key is selec
58. screw hold downs Fig 2 2 Preparation for Use NOTE Because of the spring latch feature and rack handle requirements the rackmountable RTD 710A cannot be installed in rack slides for other types of instru ments The slide tracks supplied with the rackmountable RTD 710A are equipped to accommo date the spring latches and rack handles Fig 2 3 RACKMOUNTING Refer rack selection and actual installation of rack mounting hardware to qualified service personnel PACKAGING FOR SHIPMENT It is recommended that the original carton and packing material be saved in the event it is necessary for the instru ment to be reshipped using a commercial transport carrier If the original materials are unfit or not available then re package the instrument using the following procedure 1 Use a corrugated cardboard shipping carton having a test strength of at least 375 pounds and with an inside di mension at least six inches greater than the instrument dimensions RACK HANDLES SCREW HOLES RACKMOUNT LATCH RELEASES Fig 2 2 Location of the rackmount latch releases RTD 710A Instruction Manual 2 5 Preparation for Use CUTOUT FOR RACK HANDLE SPRING LATCH CATCH C LEFT FRONT RAIL OF RACK Fig 2 3 Spring latch catch and cutout for rack handie 2 if the instrument is being shipped to a Tektronix Ser vice Center enclose the following information the owner s address name and phone
59. tapped the bar nuts may or may not be used RTD 710A Instruction Manual l p4 Servicing Instructions BAR NUT USE iF THE FRONT RAIL IS NOT TAPPED A FRONT RAIL MOUNTING Co RAIL C SHALLOW RACK MOUNTING PHS SCREW t FLUSH WITH REAR RACK RAIL B DEEP RACK MOUNTING SS NWA x NY FLUSH WITH REAR RACK RAIL X BAR NUT Fig D 13 Rackmount slide detail 2 Stationary intermediate Section Identification _ To determine which sections go on which side of the rack follow this identification procedure a o d n When the Stationary Section is installed on the cor rect side its Automatic Latch is closest to the top Each Intermediate Section has a small notch at one end of the widest part of the section When the Inter mediate section is inserted into the Stationary Sec tion that notch is toward the rear Also when the Intermediate Section is installed in the correct Sta tionary Section the Stop Latch Hole at the rear of the section is closest to the top This causes the Intermediate Section to lock into the Stationary Sec tion before it can be pulled completely out of the Stationary Section This feature is very important for operator safety and equipment protection The last feature of the intermediate Section is a small offset of material in the bottom front part of the slide to keep the section from inserting completely into the Stati
60. the controller must serial poll the GPIB instruments to deter mine which one had its SRQ line set true When the right instrument is polled the RTD 710A in this case it would set its SRQ line false and send its status byte Command Error decimal 97 in this case to the controller If the controlier wants more specific information about the error it can send an EVENT query command to the RTD 710A Whereupon the RTD 710A would respond with an Event Code 103 which transiates to a Command Argument Error STATUS BYTES There are two classes of Status Bytes Device Depen dent and System Status Device dependent status bytes re port status of the RTD 710A while System status bytes report conditions common to all instruments on the GPIB that conform to the Tektronix Codes and Formats standard Table A 1 lists the RTD 710A status bytes RTD 710A instruction Manual EVENT CODES An event code is sent to the controller from the RTD 710A only when it receives an EVEnt query from the con trolier When this occurs the response is in the form EVENT lt NRt1 gt where the value lt NRt gt is a 3 digit numerical event code from Table A 2 The event code is cleared from the RTD 710A when it is reported The Event Codes listed in Table A 2 fall into general cate gories as follows Command Error A command error occurs when a mes sage cannot be parsed or lexically analyzed Execution Error An execution error occurs when a m
61. the dc offset of the input amplifier can be changed by turning the Parameter Entry Knob The value of the offset is displayed in either of two units 9e or V The units alternate when the blinking OFFSET key is pressed Resolution is in 1 units from 199 to 199 For units the display shows the offset voltage in percentage of the cur rent RANGE selection For V units the display shows the offset voltage either in V or mV con verted to volts from the equivalent percent of RANGE The display shows the first three digits rounded off COUPLING A toggle key that selects the coupling mode for the input signal The indicator above the contro displays the selected coupling mode When TVCLP is se lected Option 5 only the AC indicator also lights Each coupling mode is described below AC The input signal is capacitively coupled to the input amplifier dc components of the input signal are blocked GND The input of the input amplifier is referenced to ground DC All frequency components of the input signal are coupled to the input amplifier RTD 710A Instruction Manual Operating Instructions TVCLP TV Option 05 only For channel 1 only Provides use of the back porch clamp when the in put signal is a TV signal When selected on a non Option 05 unit a NO OPTION indicator lights in the display section above the Parameter any Knob VERT MODE A push to select key Alternately selects one of two operating
62. the REJ Trigger COUPLING functions In the TV Trigger functions the polar ity of the signal to the sync separator can be switched to either or using the Trigger SLOPE toggle key To ensure proper sync operation the polarity of the sync signal should be selected as follows a When the composite video signal has a negative sync signal the Trigger SLOPE shouid be set to nega tive 6 2 b When the composite video signal has a positive sync signal and a negative video signal the trigger slope shouid be set to positive TV Trigger Coupling The Trigger COUPLING toggle key selects the available TV triggers LINES FLD1 or FLD2 These TV triggers en able the RTD 710A TV option video sync separator circuits to provide stable sync triggers for composite TV signals with line counts from 525 to 1280 and 50 to 60 Hz sync pulses Whenever a horizonta sync pulse occurs during the ARM period a waveform acquisition trigger occurs LINES in this trigger mode the waveform acquisition is triggered as soon as a TV horizontai sync pulse is detected on either the CH1 or EXT TRIG IN input Any horizontal sync pulse will cause a trigger in this mode without a line number being designated therefore the FIELD LINE key is not selectable in this mode FLD1 FLD2 In these modes the waveform acquisition is triggered when a specified TV line number within the se lected fieid occurs When one of these modes is selecte
63. value Sets trigger delay value A negative number indicates pretrigger NHRx z points or time NRx LENgth lt NRx gt 8 to 262136 in increments of 8 for SAMple MODe NORm NRx LENgth lt NRx 16 to 262128 in increments of 16 for SAMple MODe HiSpd time points sample interval if lt NRx gt is not legal it is truncated and limited to a legal hardware setting and a warning SRQ is issued if EXW is on When queried value is NR1 for Point unit or NR3 for Time unit Trigger delay value determines the trigger position where a negative number sets pretrigger and a positive number sets posttrigger Trigger position is used as a time origin for the break point location cursor position PT Off of waveform preamble STAn of DATa command and STArt of WINdow command Change of trigger delay value may affect the above values and limitation may occur for those values Selects trigger coupling HFReg attenuates signals above 50 kHz LFReg attenuates signals below 50 kHz AC blocks dc components and attenuates signals below 60 Hz LINes FLD1 and FLD2 are for TV Option only For FLD1 and FLD2 TRigger SOUrce CH1 is forced and if TRigger SLOpe is set to BI PHYs or NHYs it is forced to NEGative If Trig Source is CH2 and TV trigger coupling is requested the Trig Source is changed to CH1 and SRQ is issued if EXW is on if LINE or FLD1 or FLD2 is requested and TV Trigge
64. waveform measurement queries Refer to STAn for NRx values Sets the vertical level for PCRoss and NCRoss lt NRx gt 1 to 1023 Queries for the selected window settings LOCation is in NR1 format STArt is in NR1 format STOp is in lt NR1 gt format LEVel is in NR1 format Example response WINDOW CHANNEL CH1 LOCATION 1 START 400 STOP 1647 LEVEL 512 Queries for the maximum value of the acquired waveform between the STArt and STOp addresses The value returned 0 1023 is in lt NR1 gt format Queries for the minimum value of the acquired waveform between the STAn and STOp addresses The value returned 0 1023 is in lt NR1 gt format Queries for the top value of the acquired waveform between the STArt and STOp addresses The value returned 0 1023 which is calculated by the histogram method is in NR1 format l Queries for the base value of the acquired waveform between the STArt and STOp addresses The value returned 0 1023 which is calculated by the histogram method is in NR1 format l i Queries for the waveform point within the STAn STOp win dow where the positive going waveform first crosses the LEVel setting The value returned which is linearly interpolated is in NR1 or lt NR2 gt format If there is no positive crossing point the ASCII string is returned RTD 710A Instruction Manual Programming Command Set Table 5 15 Cont INTERNAL WAVEFORM ANALYSI
65. while a post trigger delay allows acquisition of data after the trigger event To set internal TRIG DELAY 1 Push the TRIG DELAY key Its current value will be displayed on the Trigger display ACQUISITION DISPLAY UPDATE Prime e RN c M ACQUISITION SYSTEM RESET aC arap pt rapat A m END OF LAST ACQUISITION RTD 710A Instruction Manual ARM DELAY INTERVAL pa ae ar EEEE an START PRETRIGGER ACQUISITION AAEE aa aparer as E Fa TRIGGERABLE apti imm or aml TRIGGER DELAY INTERVAL 3 29 Operating instructions 2 The value of TRIG DELAY can be set in points of address or time equivalent of points times the sample inter val Once the TRIG DELAY key indicator starts blinking additional pushes cause it to toggie between points or time settings except time settings are not available when the Time Base CLK SOURCE is EXT ernal The available TRIG DELAY is from record length 8 to 4 262136 in increments of 8 in NORM Sample Mode or from record length 16 to 4 262128 in HI SPD Sample Mode PRE TRIGGER OPERATION In pre trigger operation data is written to waveform memory upon receipt of the ARM signal After one record of pre trigger data is acquired the instrument becomes triggerable When a trigger input occurs the acquisition is terminated after acquisition of post trigger data has been completed A minus trigger delay value determines the number of points of pretrigger
66. while the LED is blinking the instrument im mediately stops the acquisition without waiting for completion and enters the HOLD state RECORDING Refer to Fig 3 6 for location of items 23 through 30 e048 RECORDING RECORD RECORD yE ERY FS LOCATION e TiMES BREAK P INT 8 SE SP N 9 iem on TIME IPT ga TEME NOAM Ps T ADV 9 RECORD MODE Fig 3 6 Recording section of front panel 23 Recording Display Displays the current record length record location or breakpoint Also displays the averaging and enve lope number of times Time or clock point display can be selected for breakpoint RTD 710A instruction Manual RECORD LENGTH A push to select key with LED When selected LED blinking the record length of the waveform memory can be changed by rotating the Parameter Entry Knob The waveform memory can be selected in 1 2 4 B 16 32 64 128 or 256 equal blocks Possi ble record length is 1024 to 131072 words when VERT MODE is set to DUAL and 1024 to 262144 words when VERT MODE is set to CH1 ONLY If the record length is changed during acquisition the instrument stops the acquisition and enters the HOLD state RECORD LOCATION A push to select key with LED When selected LED blinking the record location of the waveform mem ory in which waveform data will be recorded can be selected by turning the Parameter Entry Knob The maximum value for RECORD LOCATION is 128 when V
67. 0 For isi to 2048 240 Iwfm i 400 sin i 3 14 180 511 250 Next i 2650 Print SENDING WAVEFORM 27 0 Print 1 DAT CHANNEL CHI LOCATIQN START 0 COUNT 2048 BFORMAT BINARY BSIZE 2048 280 Print 1 WFM XUN SEC XIN 10E 8 PT FMT Y YZE 0 YOFF 512 PT 0 0 YMU 5 290 Dim Curve to 2048 2410 300 Putmem buffer curve using FA 15Z CURVE iwfm 310 Print fi curve 320 End 1000 Sub srqhdir 1010 Poll status adrs l 1020 Input adrs prompt EVENT event 1030 Print SRQ from address adrs Status status 1040 Print Event code event 1050 Resume 1060 End 5 31 Programming Command Set Program explanation 170 210 220 230 250 260 270 280 290 300 310 320 Set up environment Send message to user Create reference waveform Send message to user Send Data command to setup RTD 710A Send waveform preamble data to RTD 710A Create data array Put reference waveform in data array Send dat array to RTD 710A End of Main Program 1000 SRQ handler performs serial poll and displays Status 1060 SPS BASIC Example 100 110 120 130 140 150 180 170 180 190 200 210 220 230 240 250 260 270 280 REM REM Create store reference waveform in variables REM W 2047 is waveform data REM WP z WFMPRE XUNIT SEC XINCR 10E 9 PT FMT Y PT OFF 0 YZERO 0 YMULT 5 DT DATA CHANNEL CH1 LOCATION 2 START 0 COUNT 2048 BFORMAT BINARY BSIZE 20
68. 0A address 1 Plotter address 2 140 150 init all 160 Open 1 gpib pri 1 eoms 0 170 Print fi DEVICE SETTINGS ON VAVFRM ON GRAT ON 180 Print fi PLOT 190 Wbyte atn unt un 34 65 make plotter listener 200 On eoi then call alidone 5 34 210 Enable eoi 220 Wait 230 End 1000 Sub alldone 1010 Wbyte atn unt un 1020 Print Plot is done 1030 Resume 1040 End Program Explanation 150 160 170 180 190 220 210 220 230 1000 1010 1020 1030 1040 Set up the environment Send DEVICE command Send PLOT command Make plotter a listener and RTD 710A a talker Call subroutine alldone when EOI interrupt Enables the EO interrupt Wait EO interrup End of main program Beginning of subroutine alldone Send UNT UNL Print message Returns to main program End of subroutine alidone RTD 710A instruction Manual Section 6 OPTIONS OPTIONS A1 A5 The RTD 710A is shipped with a detachable power cord as ordered by the customer Descriptive information about the international power cords is provided in Section 2 Preparation for Use The following list identifies the Tektronix part number for the available power cords Option A1 Universal Euro 161 0104 06 Power Cord 2 5 m Option A2 UK 161 0104 07 Power Cord 2 5 m Option AS Australian 161 0104 05 l Power Cord 2 5 m Option A4 North American 161 0104 08 Power Cord 2 5 m Option A5 Switzerland 161 0154 00 Power
69. 1 CH2 or EXT TRIG in to Recognition rear panel TRIG D OUT Internal Trigger l l Approximately 40 ns External Trigger Approximately 30 ns Clock Output Signal Level ECL Open emitter output into Connector is mounted on rear panel Clock out signal 150 ohm connected to 2 V can drive another RTD 710A i Frequency Outputs internal 200 MHz when clock source is internal Direct Mode Outputs externally supplied clock when clock source is external Direct divided mode can be selected by internal strap Set to divided at factory Divided Mode Same as sampling clock Connects respective front and rear panel connectors Through Connectors 1 2 and 3 via 50 ohm coaxial cabies B 8 RTD 710A Instruction Manual Characteristic Interface Function IEEE 488 1978 Maximum Data Transfer Rate Parameter Selection Switch Talk Listen Address Terminator Mode Plotter Commands Data Connector Signal Levels Signal timing Maximum Data Rate RTD 710A Instruction Manual Specifications Tabie B 2 cont Performance Requirement Supplemental information GPIB INTERFACE SH1 AH1 T5 L4 SR1 RL1 PPO DC1 DT1 CO E2 At least 250 Kbytes per second Mounted on rear panel 5 bit switch Primary address is selectable from 0 to 30 Address 31 is reserved as an OFF bus 1 bit switch t LF or EOI 0 EOL RTD 710A supports a digital plotter Outp
70. 1 OUT EXT CLK IN CLK SOURCE EXT Biden SAMPLE INTERVAL E n TRIG MODE SGL TRIG SOURCE CH1 TRIGGER CONDITIONS SAME FOR ALL UNITS 6397 58 204 16 Fig 3 46 Parailel operation of RTD 710As Three methods that may be used to provide a synchro nous sample clock signal are 3 48 1 Simultaneously input a suitable external clock to all of the RTD 710A instruments via the EXT CLK IN connector located on the rear panel 2 When all of the RTD 710A instruments cannot be driven with an external clock due to fanout the external clock should be input to the EXT CLK IN connector of the first RTD 710A and the CLK OUT connector of that RTD 710A used to drive the EXT CLK IN of the next RTD 710A and so on until all RTD 710A clock lines are connected in series The sampling interval externa clock division ratio must be set the same on ail RTD 710A instruments 3 When an appropriate external clock is not available the internal clock source of the first RTD 710A can be set to some sample interval and then the other RTD 710A instru ments can be connected in series in the manner explained in 2 above When connected in this manner the external clock division ratio of the second and following units must be set to unity 1 1 The following methods may be used for obtaining a syn chronous trigger signal 1 When using an internal trigger a trigger source signal is input to the same input channel of all the RTD 710A in
71. 2 for Normal sampling mode 10 to 524256 for High Speed sampling mode If limitation occurs a warning SRQ is issued if EXW is on Actual effective location is limited to the value shown below First NRx address time address 16 to record length trigger delay 16 in increments of 8 in NORmai SAMpie MODe address 32 to record length trigger delay 32 in increments of 16 in HISpd SAMpie MODe time is calculated by address sample interval in seconds If the external clock source is selected only lt ad dress can be set Second NRx sets the sampling interval for the breakpoint defined by the first NRx See SAMple INTerval for aliow able NRx values RTD 710A Instruction Manual Header Argument BREakpoint UNIt SET BREakpoint REPeat NUMacq RTD 710A Instruction Manual Programming Command Set Table 5 3 Cont TIME BASE AND RECORDING GROUP Link Argument lt NRx gt Description Reports selected BREakpoint settings For SET the first lt NRx gt value is in NR1 format for points and NR3 format for time The second NRx value is in NR3 format Reports ail BREakpoint settings Example response BREAKPOINT UNIT POINT SET 0 10 0E S SET 520 100 0E 9 Sets the number of acquisition cycles for the time base not available via front panel This command is the equivalent of having the instrument acquire NRx times and receiving
72. 20 MHz 500 mV p p 20 MHz 100 MHz 700 mV p p DC HF Rej DC 50 KHz 500 mV p p DC IDC 20 MHz 500 mV p p 120 MHz 100 MHz 700 mV p p B 4 l i ATD 710A instruction Manual Characteristic Level Range For both Level 1 and Level 2 Internal Accuracy External Accuracy External Trigger input Input R and C Maximum Input Voltage Trigger Deiay Range Trigger Point Normal Sampling Mode High Speed Sampling Mode Trigger Point Uncertainty Normal Sampling Mode High Speed Sampling Mode Internal Arm Delay Range Arm Clock Accuracy Ext Arm input Signal Level RTD 710A instruction Manual Specifications Tabie B 2 cont Performance Requirement i 0 to 99 of input range 5 of reading 5 of full scale O V to 4 95 V 0 to 99 of 5 V xt 1596 of reading 5 of fuil scale 1 Mohm zx 10 paralleled by approx 40 pF 25 V peak Full Record Length 8 to 262136 Full Record Length 16 to 262128 1 5 clock cycles approx 30 ns 3 0 clock cycles approx 30 ns 0 or 10 ms to 10 s 5 of reading Hrs 0 V to 5 5 V maximum input Impedance 1 TTL load l Supplemental Information Selectable in 1 steps or voltage steps that are equivalent to steps calculated as follows V value Input Range rounded to 3 digits Selectable in 1 0 05 V steps 1 of 5 Vj or voltage steps that are equivalent to steps calculated as fol
73. 33 53 41 73 2741113 31 123 27 153 27 123131 VT ESC K k B 11118 27 26 43 38 59 E498 75 58 918 6B 107 123 dis 34 54 12 74 28 114 12 134 28 154 28 119 9 FF FS lt L XN C i2itC 28 E2C 44 13C 60 E4C 76 1 5C 92 EEC 108 124 15 35 55 13 175 esa tts 13 135 298 155 29 11211 CR GS m M m D 13 1D 29820 45 130 614940 77 5D 933 6D 109 125 16 36 56 14 76 30 16 14 136 A 30 156 30 111 SO RS gt N n E 14 1E 30 9 25 46 3E 62 4E 78 5E 94 ESE 110 126 17 37 57 18 77 UNL E 117 154 137 UNT 157 EN 111 1 SI US 0 o RUBOUT F 15 P 1F 31 2F 47 3F 63 EF 791 SF 95 amp SF 111 127 ADDRESSED UNIVERSAL LISTEN TALK SECONDARY ADDRESSES COMMANDS COMMANDS ADDRESSES ADDRESSES OR COMMANDS KEY octal 25 PPU GPIB code NAK ascitcharacter 15 hex 211 decimal TEKTRONIX STD 062 5435 00 4 SEP 80 COPYRIGHT 1979 1980 TEKTRONIX INC ALL RIGHTS RESERVED Tektronbc COMMITTED TO EXCELLENCE REF ANSI STD X3 4 1977 IEEE STD 488 1978 l ISO STD 646 1973 a Aa A EA A A BB GB VB B BA AB AB EB AB G WARNING THE FOLLOWING SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY TO AVOID PERSONAL INJURY DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO REFER TO OPERATORS SAFETY SUMMARY AND SERVICE SAFETY SUMMARY PRIOR TO PERFORMING ANY SERVICE Servicing Instructions 5 Carefully slide the power supply toward the fro
74. 4 5 A D output cable connectors 4 5 A D output receiving circuit 4 6 A D output operation PUE eer 4 7 Transfer of 10 bit waveform data 5 24 Binary block data iso ers us 5 25 Arbitrary block data 5 25 Option 19 blank front panel ic 6 1 Composite video display pea 6 amp 4 Horizontal sync pulse display 6 4 Vertical sync pulse display using trigger delay ict tl cat e eae cs e Saou NS 6 4 Cabinet cover removal ia D4 Right side cabinet cover carrying handle removal uruan BOR et cates pie D 2 Power supply removal D 4 Power supply side panel and line voltage a1 2 uos ates Dex eder s er PUn etus D 5 Main chassis cover and circuit board retallibl voor EY EAR e rod Sha eus D 6 CRT monitor output jumper locations D 7 External arm signal jumper location D 8 Cabinet to rackmount conversion D 9 Rackmount assembly sections D 10 Rackmount hole spacing D 11 Instrument rackmounting length and clearance cuori lud qtiod OR D 11 Rackmount slide detail 1 D 13 Rackmount slide detail 2 D 14 Installing removing the instrument from Ihi Tack eorr e npe ATi hes D 15 RTD 710A Instruction Manual Table No 0 4 2 1 2 2 3 1 3 2 3 3 3 4 3 5 3 6 e 3 7 3 8 3 9 3 10 3 11 4 1 5 1 5 2 5 3 5 4 5 5 5 6 5 7 5 8 LIST OF TABLES Page RTD 710
75. 4240 While the values can be designated in steps of either 8 NORMAL or 16 HI SPEED the upper limits of the address that is effective for the record is record length trigger delay 16 or 32 Breakpoints exceeding the effective limit may be ignored Fig 3 32 shows an exam ple where 4 breakpoints have been set Figs 3 33 and 3 34 show an example of a singie acquisition where the break point function was used 3 38 MEMORY a 6 ADDRESS 2047 ACQUIRED DATA 2K WORDS 760 1027 1520 BREAKPOINT ADDRESS SAMPLE g Deel neem Pee INTERVAL 20 ns 500 ns 100 ns 100 ns 50 ns RECORD LENGTH 2K TRIGGER DEL AY 0 A POST TRIGGER i 128 MEMORY a 1900 0 ADDRESS 3947 ACQUIRED DATA 2K WORDS BREAKPOINT Lemno GR p 4l E s RU 20 ns SAMPLE gw INTERVAL 500 ns 1080 ns RECORD LENGTH 2K TRIGGER DELAY 1000 B PRE TRIGGER 6397 4517204 10 Fig 3 32 Breakpoint settings with pre trigger and post trigger NOTE A breakpoint may be set at address 0 but in such a case the sample interval becomes the area from the first address of the waveform memory to the first breakpoint RTD 710A instruction Manual Fig 3 33 Breakpoint waveform with post trigger BREAKPOINTS Fig 3 34 Breakpoint waveform with pre trigger To set breakpoints 1 Push the BREAKPOINT SET key This will jock the sample interval between the last
76. 48 LOAD INS ATTACH 1 AS INS 80 1 MODE 1 PAK HBF INTEGER W 2047 FOR 120 TO 2047 W 1 2400 SIN i61 3 14 180 511 NEXT I PUT WPS INTO 1 PUT DT INTO 1 PUT CURVE W INTO 1 BIN END Program explanation 180 190 200 210 220 240 250 260 270 280 5 32 Load the instrument driver Specify RTD 710A at GPIB address 1 as instrument 1 Set interface to accept packed data Create reference waveform integer array W Create reference waveform data Send a waveform setup WP Send DATA setup DT Send curve and waveform data End of program Using the REPeat Command The next two examples repeat the acquisition and trans mission of the data 10 times 4041 BASIC Example 100 110 Repeat acquisition 10X from CH1 loc 1l 120 sta 400 cou 2048 block format binary block size 2048 130 140 Init all 150 Integer status adrs event i 160 Open fi gpibO prizl eom O tra fast 170 On srq then call srghdir 180 Enable srq 190 Dim curve 10 to 2048 2410 200 Print 1 DAT CHA CHI LOC 1 STA 400 C0U 2048 BF0 8IN BSI 2048 210 Print 1 REPEAT 10 220 For isl to 10 te 230 input 1 curve i 240 Next 7 250 End 1000 Sub srahdir 1010 Poll status adrs 1020 input 1 prompt EVE event 1030 Print Status s status 1040 Print Event event 1050 Resume 1060 End Program explanation 140 Set up environment 180 190 Cr
77. 710A instruction Manual Appendix B SPECIFICATIONS This specification applies when the instrument has been calibrated at an ambient temperature beween 20 C and 30 C has had a warm up period of at least 20 minutes and is operating in an ambient temperature between 0 C and 50 C unless otherwise noted Table B 1_ ENVIRONMENTAL SPECIFICATION CHARACTERISTIC PERFORMANCE REQUIREMENT Temperature Meets MIL T 28800C class 5 Class 5 non operating temperature exception due to inter nal LEDs and cooling fan Operating loc to 50 C Non operating 30 C to 70 C Humidity Operating and Non operating 0 to 95 relative humidity noncondensing See CR Pru Lc ee ee ee ee OT ae we ee ee ee en Altitude Operating 15 000 ft 4 5 Km maximum Non operating 150 000 ft 15 Km maximum Vibration Operating 0 015 inch 0 38 mm p p Shock Non operating 30 g s maximum Bench Handling Operating Drop from 4 inches or 45 degrees on all significant faces Packaged Product Vibration i Qualifies under the National Safe Transit Association s Pre shipment Test Procedures and Drop Project 1A B 1 I III E I I E IA Her e ne inh PE MB ie i t i i i i i a TT TT TT HH i t Vibration 1 inch 25 4 mm p p at 4 63 Hz 1 1G for 30 minutes M Drop 24 inch 0 61 m Electrostatic Immunity Withstands discharge through 1 Kohm resistan
78. 8 block format binary block size 2048 130 140 Init ali 150 Integer status adrs event 180 Open fi gpibO pri 1 eom lt 0 gt tra fast 170 On srq then call srghdir 180 Enable srq 190 Dim curve to 2048 2410 200 Integer wfdata 2048 210 Print 1 DAT CHA CH1 LOC STA 400 COU 2048 i BFO BIN BSI 2048 220 Print 1 CURVY 230 GETARR 1 wfdata l8 240 End 1000 Sub srqhdlr 1010 Poll status adrs l 1020 input 1 prompt EVENT event 1030 Print Status status 1040 Print Event event 1050 Resume 1066 End Use lines 220 and 230 as is if 4041 has UTL2 program If not use 220 Input 1 prompt CURVE curves 230 GETMEM buffer curve using 6X 16 widata RTD 710A Instruction Manual Programming Command Set Program explanation 140 Set up the environment 180 190 Create curve data array curve 200 Create waveform data array widata 210 Send DATA command to set channel to CH1 location to 1 start to 400 count to 2048 block format to binary and block size to 2048 220 Query for curve data CURVE 230 Input data and store widata 240 End of main program 1000 SRQ handler performs serial poll and displays status 1060 SPS BASIC Example 100 REM 110 REM Get a waveform from CH1 loc 1 start 120 REM 400 count 2048 block format binary block size 2048 130 REM 140 LOAD GPI 150 INTEGER H 8 W 2047 160 PUT DATA CHA CH1 LOC 1 STA
79. 8 der die das RTD7IOA DIGITIZER AND ALL INSTALLED OPTIONS NAE in bereinstimmung mit den Bestimmungen der Amtsblatt Verfug ng 1046 1984 funkentsi ri ist Der Deutschen Bundespost wurde das Inverkehrbringen dieses Ger tes angezeigt und dic Berechtigung zur berprul ng der Serie auf Einhalten der Bestimmungen einger umt SONY TEKTRONIX NOTICE to the user operator The German Postal Service requires that Systems assembled by the operator user of this instrument must also comply with Postal Regulation Vig 1046 1984 Par 2 Sect 1 HINWEIS f r den Benutzer Betreiber Die vom Betreiber zusammengestellte Anlage innerhalb derer dies Ger t eingesetzt wird mug ebentalls den Voraussetzungen nach Par 2 Zilf 1 der Vig 1046 1984 ge ugen NOTICE to the user operalor The German Postal Service requires that Ihis equipment when used in a lest selup may only be operated if the requirements of Postal Regulation Vig 1046 1984 Par 2 Sect 1 7 1 are complied with HINWEIS f r den Benutzer Betreiber Dies Ger t dar in MeSaulbauten nur betrieben werden wenn die Voraussetzungen des Par 2 Ziil 1 7 1 der Vig 1046 1984 eingehalten werden eiim em Ra ORI TEAD ep Ee OTT La MES LR n SR ARTE LSS GSE 13612524 apa Qe CI SCNT ertt DU tA H o NEL OE ER Drm H ita t at S M TT STEHT SEPT Hm Vides PREFACE GUIDE TO RTD 710A DOCUMENTATION The RTD 710A Digitizer
80. A Documentation i AC Voltage Ranges and Fuses 2 2 Power Cord and Plug Identification PRIOMGALONS ung gestor hr ROGER pases tS 2 3 Default Control Key Selections Values 3 3 7 Segment Display Default Values 3 4 Trigger Level Settings eese 3 8 Record Length Selection 3 13 Measurements Using Cursors 9 7 Initialization Defaults isses 3 18 Sample interval Auto Call a a eaaa 3 25 Display Conditions Reset to Armd 3 36 Display Conditions Arm d to Trig d 3 36 Cursor Measurements with the Measure FURGON inc RA send nee PR es 3 43 Horizontal Zooming Rates 3 44 RTD 710A GPIB interface Function SUHSelS bet Goer ese hee ems aed 4 2 Numeric Format for Link Arguments 5 2 Vertical System Control Group 5 3 Time Base and Recording Group 5 4 Triggering Group 0 eee ee eee ee 5 8 Cursor and Display Control Group 5 10 Waveform Parameter Measurement Group 5 12 Waveform Transfer Group 9 13 Calibration Group a eerie medo 5 16 RTD 710A instruction Manual Table No 5 9 5 10 5 11 5 12 5 12 1 5 13 5 14 5 15 A 1 A 2 B 1 B 2 B 2 1 B 2 2 B 2 3 B 2 4 B 2 5 B 3 B 4 Self Test Group sex rx San RP PEE Utility Command Group isses Device Trigger Group sisse initialization Group REOS WINdow and DATa Settings Service Request
81. Cable 012 1117 00 1 2 RTD 710A Instruction Manual Section 2 PREPARATION FOR USE SAFETY Refer to the Operator s Safety Summary at the front of this manual for power source grounding and other safety the voltage at the power source to make sure it falls within the voltage range shown by the line voltage indicator If the setting of the line voltage indicator does not match the avail able line voltage refer the instrument to qualified service considerations pertaining to the use of the instrument Be personnel fore connecting the instrument to a power source read both this section and the Safety Summary This instrument may be damaged if operated on a power source line voltage outside the range selection of the internal power supply jumper which is indicated by the line voltage indicator on the rear panel of the instrument Damage may also occur if the wrong size line fuse is installed CHECKING LINE VOLTAGE The RTD 710A operates from either a 115 V or 230 V nominal ac power source having a line frequency ranging from 48 Hz to 66 Hz When the instrument is shipped its internal power supply line voltage selector is set as indi cated by the rear panel line voltage indicator Fig 2 1 Be fore connecting the power cord to a power source check FORE NOMINAL 115V 90 132V JBA MEDIUM Fig 2 1 Location of line voltage indicator RTD 710A instruction Manual 2 1 Preparation for Use If the line voltage
82. Control Group iss Event Query Group ime sr eee w Internal Waveform Analysis Group RTD 710A Status Bytes BID 710A Event Codes ocu ess Environmental Specifications Electrical Specifications issue Normal Sampling Mode Dynamic ACCBIaCy Lure yp E ERA Normal Sampling Mode Dynamic Accuracy 90 of Full Scale Range Analog input High Speed Sampling Mode Dynamic Accuracy a et High Speed Sampling Mode Dynamic Accuracy 90 of Full Scale Range Analog input Trigger Sensitivity to Repetitive Signal llc Mechanical Specifications m TV Trigger Option 05 Specifications vii OPERATORS SAFETY SUMMARY The general safety information in this summary is for the protection of both operating and service personnel Specific warnings and cautions are found throughout the manual where they apply and do not appear in this summary TERMS Terms in This Manual CAUTION statements identity conditions or practices that could result in damage to the equipment or other property WARNING statements identify conditions or practices that could result in personal injury or loss of life Terms as Marked on Equipment CAUTION indicates a personal injury hazard not immedi ately accessible as one reads the markings or a hazard to property including the equipment itself DANGER indicates a personal injury hazard immediately ac cessible as
83. Coupling isses 6 2 RACK REQUIREMENTS D 10 Trigger Slope for TV Coupling 6 2 INSTALLING THE RACKMOUNT TV Trigger Coupling TEE 6 2 SIDE COVERS D 12 LINES e os TENUERE 6 2 INSTALLING THE RACK FLD1 FLD2 esses 6 2 HARDWARE con sie ee doers D 12 System M vs Nonsystem M 6 2 Stationary intermediate Section Special TV Measurements 6 3 Identification L n unauna D 14 OVERSCAN DISPLAY 6 3 INSTALLING THE INSTRUMENT RF INTERFERENCE 6 3 IN THE RACK ccc ccc ee ne D 14 Field Frame and Line Definitions REMOVING THE INSTRUMENT for 525 60 and 625 50 TV Systems 6 3 FROM THE RACK uuina D 16 CCIR SYSTEMM 6 3 RACK ADJUSTEMENTS D 16 CCIR SYSTEM B AND SIMILAR 625 50 SYSTEMS 6 3 RTD 710A Instruction Manual Fig No 2 2 2 3 3 1 3 2 3 3 3 4 3 7 3 8 3 9 3 10 3 11 3 12 3 13 3 14 3 15 3 16 3 17 3 18 3 19 3 20 3 21 3 22 3 23 3 24 3 25 3 26 3 27 3 28 3 29 3 30 3 31 3 32 3 33 3 34 3 35 3 36 3 37 3 38 3 39 vi 3 5 LIST OF ILLUSTRATIONS Location of line voltage indicator 2 1 Location of the rackmount latch releases 2 5 Spring latch catch and cutout for rack HANGS ss un Qu x Lee EUR ane eae pM 2 6 MON CAL test pattern 3 4 RTD 710A Digitizer front panel 3 6 input section of front panel 3 6 Trigger section of front panel 3 8 Time Base section of f
84. Do not unwrap the intermediate and Stationary Sections until ready to install them as they may slide apart and become intermixed with each other installing the sections improperly may cause the instrument to slide out of the rack and injure the operator Before installing the sections see the Stationary Intermediate Section Identification Proce dure paragraph To install the rack hardware 1 Select the appropriate holes in the front and rear ver tical rack rails using Fig D 10 as a guide RTD 710A instruction Manual bee Servicing instrictions 10 32 PHS 5w CEL SCREWS ach CHASSIS c AUAM SECTION STATIONARY SECTION AUTOMATIC ud LATCHES 77 REAR MOUNTING BRACKET RACK LATCH gt HOLE ey cen 32 PHS FLAT iy INFERMEDIATE SCREWS NUTS SECTION STOP LATCH HOLES JENGAGES WITH RACK RELEASE LATCH 2NOT REQUIRED IF RACK HOLES ARE TAPPED 6397 7 Fig D 12 Rackmount slide detail 1 2 Using the 10 32 PHS truss head screws and bar nuts NOTE for untapped ralis provided in the rackmount hardware mount the Stationary Sections for each side to the front and The front lip of the Stationary Section must mount in rear rack rails Figs D 12 and D 13 When mounting the front of the front rail to allow the spring latch to furic bo sections to the rear rack rails use either the deep or shallow tion properly Fig D 13A 2m rack methods shown in Fig D 13B or D 13C If the rack rail holes are
85. ERT MODE is set to DUAL and 256 when VERT MODE is set to CH 1 ONLY as shown in Table 3 4 l i Table 3 4 RECORD LENGTH SELECTION Record Vertical Mode l L DUAL CH1 ONLY ength i 8 4 131072 1 2 262144 mi 1 When increasing the record length if the increase requires the location number to be higher than the maximum record location the record location num ber automatically resets to the maximum allowable vaiue RTD 710A Instruction Manual Operating instructions in Envelope mode with AVE ENV of TIMES set to 2 or more the maximum allowable record location setting is maximum record length from Table 3 4 t i In the Auto Advance mode the RECORD LOCA TION key is used to set the last record location for the auto advance recording For exampie when record length is set to 2048 and the record location is set to 8 number of record location is 64 in dual mode the auto advance recording is performed for record location 1 through 8 but the remaining record locations 9 through 64 remain in the HOLD state AVE ENV OF TIMES A push to select key with LED that allows changing the number of times the acquisition is averaged or enveloped When first selected the record mode automatically switches to AVE except when set to ENV The number of times for averaging can be set between 2 and 16384 in steps of 2 To set the num ber of times for enveloping press the RECORD MODE ENV key then press the AVE
86. Instruction Manual B 7 Specifications Table B 2 cont Characteristic Performance Requirement Supplemental Information SIGNAL INPUT OUTPUT Display Monitor Output Tektronix type 620 monitor is recommended CRT X Output l BNC connector on rear panel Resolution o 2048 dots Output Voltage Internal jumper selectable set to 1 V at the factory Output Resistance Step Speed Approx 2 5 us per dot CRT Y Output BNC connector on rear panel Resolution 1024 dots Output Voltage 1 Vp p or 5 Vp p 5 internal jumper selectable set to 1 V at the factory Output Resistance 400 ohm 20 CRT Z Output Output Voltage 1 Vp p or 5 Vp p 5 15 for retrace blanking Positive or negative internal jumper selectable set to positive at the factory Output Polarity 800 ohm 20 for 1 Vp p 1 75 Kohm 20 for 5 Vp p Output Resistance Includes phase difference in input amplifiers For identical input ranges lt 5 up to 30 MHz For different input ranges lt 5 up to 20 MHz Probe Calibration Output OV to 4V 41 1 KHz square Mini jack mounted on front panel wave into 1 Mohm TRIG D Output Initiated high when the trigger is recognized BNC connector is mounted on rear panel Phase Accuracy in X Y Mode Output Voltage High 2 5 V to 5 V for one TTL load Output is TTL compatible Output Voltage Low 0 5 V or less for one TTL load Delay from Trigger i From trigger signal at CH
87. KMOUNT LATCH RELEASES Fig D 8 Cabinet to rackmount conversion RTD 710A Instruction Manual D 9 gt Servicing Instructions CHASSIS SECTION 10 32 PHS STATIONARY SECTION REAR MOUNTING BRACKET a RACK LATCH HOLE N INTERMEDIATE SECTION SCREWS STOP LATCH HOLES N ar AR ee lc 10 32 PHS FLAT BAR NUTS ENGAGES WITH RACK RELEASE LATCH NOT REQUIRED IF RACK HOLES ARE TAPPED 6397 7 Fig D 9 Rackmount assembly sections If the instrument was shipped as a rackmountable ver sion the Rackmount Side Covers with Chassis Sections installed are aiready on the instrument On these instru ments only the rack hardware needs to be installed pyssmnesemess If the instrument is being converted to a rackmountabie version both the new Rackmount Side Covers and the rack hardware needs to be installed RACK REQUIREMENTS The RTD 710A rackmounting hardware will fit most com mercial consoles and 19 inch wide racks whose rail holes conform to universal spacing Fig D 10 Rack enclosures must allow at least two inches clear ance between the enclosure and the left and right sides and at least 3 inches at the rear panel of the instrument for air circulation It is recommended that a minimum of 3 5 inches be aliowed between any enclosure and the rear pane to accommodate the air circulation requirement and to allow cabie installation The depth of the rackmountable
88. M DELAY The amount of internal Arm Delay that can be set is 0 or 10 milliseconds to 10 seconds ina 1 2 5 sequence Operating Instructions To set internal ARM DELAY 1 Press the ARM DELAY key Its current value will be displayed in the Trigger display 2 When the key indicator is blinking use the Parameter Entry Knob to set a new value EXTERNAL ARM DELAY The amount of external Arm Delay that can be set is infinite If the ARM DELAY key is pushed while its indicator is blinking the Arm Delay input signal is from the fear panei EXT ARM connector and the character E is displayed on the Trigger display The instru ment is effectively arm d upon receipt of the leading edge of a positive going TTL signai level For additional information see the Controls Connectors and indicators description NOTE When ARM DELAY is 0 and Trigger MODE is AUTO NORM or COMPARE waveform acquisition is re peated continuously However since some amount of time is required to setup for waveform display and acquisition initialization the delay between subse quent acquisitions is greater than 0 This delay also depends upon the acquisition and display settings Trigger Delay The TRIG DELAY setting determines the trigger position of the waveform data A positive 4 trigger delay is called post trigger and a negative trigger delay is called pre trigger A pre trigger delay allows the acquisition of data prior to the trigger event
89. MHz 2i 7 3 bits 77 bits Tabie B 2 2 NORMAL SAMPLING MODE DYNAMIC ACCURACY 90 OF FULL SCALE RANGE ANALOG INPUT Input Frequency Effective Bits Typical 1 MHz 20 MHz BW limited gt 7 4 bits 7 bits 10 MHz 20 MHz BW limited gt 7 3 bits gt 7 6 bits RTD 710 Instruction Manual B 3 Specifications High Speed Sampling Mode Table B 2 2 cont Performance Requirement See Table B 2 3 and B 2 4 Measured at 5 ns sampling interval Characteristic Table B 2 3 HIGH SPEED SAMPLING MODE DYNAMIC ACCURACY Supplemental information Input Frequency Effective Bits Typical 1 MHz 20 MHz BW Limited gt 7 4 bits gt 7 9 bits 10 MHz 20 MHz BW Limited gt 7 3 bits gt 7 8 bits 50 MHz gt 6 6 bits gt 7 2 bits 100 MHz gt 6 2 bits gt 6 7 bits Table B 2 4 HIGH SPEED SAMPILNG MODE DYNAMIC ACCURACY 90 OF FULL SCALE RANGE ANALOG INPUT Input Frequency Effective Bits Typical 1 MHz 20 MHz BW Limited 7 1 bits 77 6 bits 10 MHz 20 MHz BW Limited 26 8 bits 27 4 bits 50 MHz gt 6 0 bits 26 6 bits 100 MHz gt 5 2 bits gt 5 8 bits TRIGGERING NOTE Channel 1 and Channel 2 have identical characteristics Sensitivity to Repetitive Signal See Table B 2 5 Table B 2 5 TRIGGER SENSITIVITY TO REPETITIVE SIGNAL Coupling Triggering Frequency Minimum Signal Required internal External AC 30 Hz 20 MHz 500 mV p p 20 MHz 100 MHz T0 LSB i 700 mV p p AC LF Rej 50 KHz
90. NSTALLING THE RACKMOUNT SIDE COVERS 5 To convert the standard RTD 710A to a rackmountable version 1 Remove the left and right Cabinet Side Covers See removai procedure earlier in this section Also see Fig D 8 2 Remove the Bottom Feet Fig D 8 at each of the four corners of the bottom panel They are removed by sliding them toward the rear of the instrument Remove the front bail with the front feet 3 Remove the top and bottom trim strips on both sides Fig D 8 They are removed by sliding them toward the rear of the instrument 4 Remove the front bottom feet with front bail They are removed by sliding them toward the rear of the instrument 5 Install the left Rackmount Side Cover by sliding the cover into the cover grooves from the rear of the instrument Once the cover is inserted install two 6 20 PNH screws supplied with the rackmount kit at the rear of the cover and install the air filter NOTE Remember the left s de is identified when facing the front panel of the instrument To identify the left Rackmount Side Cover note that 1 when the Chas sis Section is installed the small notch at the front of the section is located at the top 2 the Automatic Latch is located closest to the bottom of the section when installed Figs D 8 and D 9 and 3 the screw holes in the Rackmount Handles are at the top D121 6 install the right Rackmount Side Cover by sliding the cover into the cover grooves
91. OB A rotary knob used for setting the various param eters and for moving the cursor in the horizontal axis Pressing the key of the parameter to be changed LED of the key starts blinking and then rotating this knob changes the parameter value it is infinitely variable in both directions CURSOR 1 CURSOR 2 Push to select keys with LED Pressing these keys once causes a cursor CURSOR 1 or CURSOR 2 to be displayed as a high intensity dot or line on the channel 1 waveform on the CRT monitor The cursor can be moved to the left or right by rotating the Parameter Entry Knob while the key LED is blinking The cursor currently being controlled is indi cated by its blinking key LED This key sequences through the CURSOR 1 CURSOR 2 and OFF posi tions with multipie presses of the key RTD 710A DIGITIZER BUSY NO OPTION CONTROL VERT 790 VERT OCATION POSN DISPLAY MEASURE apponi Vus V 52 WE evi cry Tor At cE CAL ll GP s ROS 10 Tat AT pS START Il gS eo amp Q 2 6 D 9 E 5397 77 7290 3 Fig 3 7 Control section of RTD 710 RTD 710A Instruction Manual 3 15 Operating instructions 3 16 When either CURSOR 1 or CURSOR 2 is displayed the Control display shows the number of sample points counted from the trigger point to CURSOR 1 or CURSOR 2 When both CURSOR 1 and CURSOR 2 are displayed the display shows the number of sample points counted from CURSOR 2 to CUR
92. OTES The TV trigger option for the RTD 710A cannot detect color burst phasing nor Bruch Sequence color burst blanking Therefore the RTD 710A processes the field 1 and 3 signals of the four field PAL system as the same and the field 2 and 4 signals as the same For noninterlaced systems the TV trigger option de tects only the field start signal and cannot discriminate between FLD1 and FLD2 so the line numbers be come the same TV Signal Measurements The following example for making a TV signal measure ment assumes that the RTD 710A is turned on and ready for operation and has a CRT monitor attached that is cali brated and ready to use To make a TV signal measurement 1 Press the INIT key twice to initialize the RTD 710A 2 Press the RESET HOLD key to set the Hold status 3 Press the SAMPLE INTERVAL key and when its indi cator blinks use the Parameter Entry Knob to set the sam ple interval to 50 us 4 Press the CH1 INPUT RANGE key and when its indi cator blinks use the Parameter Entry Knob to set the RANGE to 0 5 V x 0 5 V 5 Select the FLD1 position with the Trigger COUPLING toggle key 6 Select the TV CLP position with the CH1 COUPLING toggle key 7 Connect a TV composite video signal from a TV signal generator an NTSC signal with negative sync signal to the CH1 input connector 8 Press the RESET HOLD key again which will cause a Reset and a trigger to cause the acquisition The waveform sho
93. RECALL LOC key is the same as for the SAVE LOC key NOTE When new front panel settings are saved into a memory location containing previously saved settings the old settings are lost DISPLAY DOT LINE A push to select key with LED used to set the wave form display method When DOT is selected 2048 points of data from the display memory are dis played as dots on the monitor The even spaced thin out algorithm is used in this display mode This mode has faster display response than does the LINE dispiay mode When LINE is selected the envelope algorithm is used and the processor calculates the line interpolated waveform data The key LED illumi nates when LINE is selected DISPLAY YT XY A push to select key with LED used to set the wave form to either YT display or XY display default value is selected the usual time domain display is made When XY display is selected key LED on the channel 1 signal is displayed on the X axis and the channel 2 signal is displayed on the Y axis NOTE Make sure that both CH1 and CH2 waveforms are displayed before selecting the XY mode RTD 710A instruction Manual Operating instructions GPIB RQS ID and LOCK REM A push to select key with LED When the RTD 710A is in the TALK LISTEN mode pressing this key gen erates an SRQ on the GPIB if the USER SRQ is ON The key LED illuminates while SRQ is asserted The Control display indicates the RTD 710A address for about 1 second
94. RTD 710A from behind the rack handies to the rear feet is 25 3 inches Fig D 11 A recommended rack cabinet depth should be at least 29 inches to meet the rear clearances above RTD 710A Instruction Manual Servicing Instructions 0 015 NORMAL CLEARANCE MIL STD EIA RS310 TO INSTRUMENT ON TOP OR BOTTOM 189 RETMA j SPACING SPACING CHOINPUT e l CH INPUT m fi TRIGGER isis RANGE isst ANE as EAE eL EE REM DRAT 2 MS ETE zG88 T TRiG ONRI eNi eiit mH CH VERI MOUE siila OCH AA Y SLOPE H2 ORY f RACK NORMAL CLEARANCE Fig D 10 Rackmount hole spacing i i i 25 3 NNNM RACK DEPTH 29 Fig D 11 instrument rackmounting length and clearance RTD 710A instruction Manual D T1l Servicing Instructions The Staticnary Sections mount easily to the front and rear vertical rails of racks with a depth of 15 to 28 inches Racks with a rail depth outside these limits must provide some means of support for the rear ends of the Stationary Sections such as extensions to the rear mounting brackets The rackmountable RTD 710A is 7 inches high which is a multiple of the 1 75 inch standard rack spacing As long as the rackmountable RTD 710A is positioned in a conven tional rack at some multiple of 1 75 inches from the bottom or top all holes shouid line up without drilling additional holes The opening between front rack rails must be at least 17 5 8 inches I
95. S GROUP Header Argument Link Argument Description NCRoss Queries for the waveform point within the STAn STOp win dow where the negative going waveform first crosses the LEVel setting The value returned which is linearly interpolated is in NR1 or NR2 format If there is no negative crossing point the ASCH string is returned MID Queries for the vertical mid level value within the STArt STOp window of the acquired waveform The returned value 0 1023 is in NR1 format and is calculated as follows MID max min 2 MEAN Queries for the vertical algebraic mean value within the STArt STOp window of the acquired waveform The returned value is in NR1 format and is calculated as follows N Mean P W i where W is waveform data TE PEAktopeak Reports the vertical peak to peak value within the STArt STOp window of the acquired waveform The returned value 0 1023 is in NR 1 format RTD 710A instruction Manual i 5 23 Programming Command Set Command ARM ARM AUTOCAL BASE BREAKPOINT BREAKPOINT BWLIM BWLIM CH1 CH1 CH2 CH2 CER CER CURSOR CURSOR CURVE CURVE DATA DATA DEVICE DEVICE DISPLAY DISPLAY DT DT ERROR EVENT EXR EXR EXW EXW HALT HELP HOLD HOLD HZOOM HZOOM ID INIT INR INR LENGTH LENGTH MAXIMUM MEAN MEASURE 5 24 ALPHABETICAL LIST OF COMMANDS Group Triggering Group Triggering Group Cali
96. SOR 1 A minus sign in the display means that CURSOR 2 is to the right of CURSOR 1 on the CRT monitor CURSOR 1 is a scroli cursor which is capa ble of moving the waveform display to the right or left if an attempt is made to move CURSOR 1 past the right let edge of the screen the displayed waveform moves to the left right CURSOR 2 does not cause the waveform to scroll NOTE The RTD 710A must be in the HOLD state to scroll VERT ZOOM A push to select key that enables vertical zooming of the waveform displayed on the CRT monitor When this key is pressed key LED starts blinking rotation of the Parameter Entry Knob changes the zoom factor for the displayed waveform Possible settings include 1 4 1 2 1 default value 2 4 8 16 and 32 times Pressing the key a second time while the LED is blinking switches the channel for zoom channel selection indicator shows the selected channel Separate zoom factor selection can be made for each channel The zoom factor is dis played on the Controi display Factors 1 4 and 1 2 are displayed in the form of 1 4 and 1 2 VERT POSN is used with VERT ZOOM to aliow viewing of a desired portion of a waveform DISPLAY indicators that are backlighted to indicate the chan nel currently selected by the cursors the channel of the displayed memory location that is displayed on the CRT monitor or the channel for vertical zoom or positioning Refer to the descriptions on the cursor
97. T 3 Fig 4 4 A D output cable connectors DATA BIT 4 D24 D24 DATA BIT 4 DATA BIT 5 025 Pp25 DATA BITS DATA BIT 6 D26 D26 DATA BIT 6 Pin 25 provides a 2 Vdc pulldown source which can D27 DATA BIT 7 provide up to 700 mA of current This source already pro vides a large margin for noise however it is recommended that it be bypassed with a 47 F electrolytic capacitor and a D29 DATA BIT 9 MSB 0 1 uF ceramic capacitor for additonal noise reduction DATA BIT 7 D27 DATA BIT 8 D28 D24 DATA BIT 8 DATA BITS D29 i CH2 CLOCK CLK2 CLK2 CH2 CLOCK GND GND SLOT 6397 13 Fig 4 3 Direct A D output port connector RTD 710A instruction Manual 4 5 interfacing DO to DS Fig 4 5 A D output receiving circuit A D OUTPUT OPERATION No special settings for the RTD 710A are necessary be fore using the direct A D Output port on the rear panel However when acquisition is started includes those times when it is started when trigger mode is AUTO NORM or COMP data output is momentarily halted then restarted Also most of the time when settings are changed during acquisition which will stop an acquisition When acquisition is made with Trigger Mode SGL single data is output with out interruption Fig 4 6 4 6 RTD 710A instruction Manual Interfacing TRIGGER MODE SINGLE FRONT PANEL PRESS POWER RESET HOLD SWITCH ON BUTTON RTD 710 l ACQUISITION ACQUISITION END
98. T I INSTRUCTION 070 7204 00 MANUAL Product Group 45 RTD 710A DIGITIZER Please Check for CHANGE INFORMATION at the Hear of This Manual First Printing AUG 1988 Tektronix COMMITTED TO EXCELLENCE an toe Edu c IBM is a registered trademark of International Business Machines Corporation DEC is a registered trademark of Digital Equipment Corporation HP is a registered trademark of Hewlett Packard Corporation Copyright 1988 Tektronix Inc All rights reserved Contents of this publication may not be reproduced in any form without the written permission of Tektronix Inc Products of Tektronix Inc and its subsidiaries are covered by U S and foreign patents and or pending patents TEKTRONIX TEK SCOPE MOBILE and a are registered trademarks of Tektronix Inc TELEQUIPMENT is a TESEO trademark of Tektronix U K Limited NO A N E m te m A arre ir rnm a sirip n ime e EE vos rti a tibi sm taa re M En Mis ue Certificate of the Manulacturer Importer We hereby cerlily that tho RTD710A DIGITIZER AND ALL INSTALLED OPTIONS complies with the RF interference Suppression requirements of Amtsbl Vig 1046 1984 The German Postal Service was nolilied that the equipment is being marketed The German Postal Service has the right to re test the series and to verify that it complies SONY TEKTRONIX Bescheinigung des Herstellers Importeurs Hiermit wird bescheinigt da
99. TEP TEST TEST TOP TRIGGER TRIGGER USER USER VALUE VMODE VMODE VPOSN VPOSN VZOOM VZOOM WAVFRM WRI WRI WINDOW WINDOW WFMPRE WFMPRE Group Waveform Parameter Measurement Group Internal Waveform Analysis Group Internal Waveform Analysis Group Calibration Group Internal Waveform Analysis Group Time Base and Recording Group Service Request Control Group Service Request Control Group Service Request Control Group Service Request Control Group Internal Waveform Analysis Group Internal Waveform Analysis Group Utility Group Utility Group Time Base and Recording Group Time Base and Recording Group Time Base and Recording Group Service Request Control Group Service Request Controi Group Self Test Group Time Base and Recording Group Time Base and Recording Group Utility Group Utility Group Service Request Control Group Self Test Group Self Test Group Self Test Group Internal Waveform Analysis Group Triggering Group Triggering Group Service Request Control Group Service Request Control Group Waveform Parameter Measurement Group Vertical System Control Group Vertical System Controi Group Cursor and Display Control Group Cursor and Display Contro Group Cursor and Display Control Group Cursor and Display Control Group Waveform Transfer Group Service Request Control Group Service Request Control Group internal Waveform Analysis Group internal Wavetorm Analysis Group Waveform Tran
100. Up to five breakpoints can be set If all have been set a new breakpoint cannot be set until at least one old setting has been cleared DISPLAYING AND CLEARING BREAKPOINTS To dis play the breakpoints that are set 1 Press the BREAKPOINT DISPLAY key When first pressed the key indicator will start blinking and the Re cording display will show breakpoints in points If the key is pressed again the display will show breakpoints in time in ternal clock oniy 2 To check where the breakpoints are set rotate the Parameter Entry Knob Each time the display changes that is one of the breakpoints that is set When the last break point is displayed further rotation of the knob in the same direction causes no further display changes The displays will range from 0 to the last breakpoint set To clear a breakpoint at this point rotate the Parameter Entry Knob until the breakpoint to be cleared is displayed then push the BREAKPOINT CLR key To clear ail breakpoints at this point rotate the Param eter Entry Knob until the last breakpoint is displayed then keep pushing the BREAKPOINT CLR key until the display is zero 0 Zero represents the trigger point 3 39 Operating Instructions Average Mode The waveform averaging process is useful for reducing uncorrelated noise in signals and improves its signal to noise ratio The effectiveness of average processing is dependent on the number of the acquisitions that are added fo
101. VEL 1 or 2 requirement the TRIG D indicator turns on indicat ng that the waveform is being acquired As soon as the waveform is acquired the HOLD status is set and the waveform is displayed Fig 3 49 16 Channel 2 also may be displayed on the CRT moni tor even though no waveform data is being input This dis play can be removed by pressing the DISPLAY LOCATION key twice turning on the CH2 DISPLAY indicator then turn ing the Parameter Entry Knob until a display location of zero 0 is displayed Cursor Measurements on Acquired Waveform The cursor measurements in this exampie are a continu ation of the previous waveform acquisition with a break point To perform a cursor measurement 1 Press the CURSOR 1 key until the CH1 DISPLAY indicator is on When the cursor dot appears at the left end of the displayed waveform it is at the 400 point address referenced to the trigger point RTD 710A Instruction Manual Operating instructions 7204 19 Fig 3 49 Transient waveform acquisition with a breakpoint 2 The first measurement to be made is the waveform peak voltage Press the MEASURE V AV key to display the voltage at the cursor location Rotate the Parameter Entry Knob to move the cursor along the waveform to the maxi mum peak voltage point Fig 3 50 6397 62 Fig 3 50 Voltage measurement with CURSOR 1 As the cursor moves toward the peak voltage the Con troi display indicates the voltage at the cur
102. W HALT HELP HOLD HZOOM ID INIT INR LENGTH MAXIMUM MEAN MEASURE MID MINIMUM MONCAL NCROSS NUMACQ OPC OVER PCROSS PEAKTOPEAK PLOT RECALL RECORD REPEAT RQS RUN SAMPLE SAVE SET SRQ STEP TEST TOP TRIGGER USER VALUE VMODE VPOSN VZOOM WAVFRM WFMPRE WINDOW WRI Stores the current instrument front panel setting into non volatile memory at location NRx lt NRx gt 1 to 20 if NRx is illegal it is truncated or limited to the nearest legal number and EXW is issued if on Recalls the instrument front panel settings from non volatile memory location lt NRx gt NRx 1 to 20 If NRx is illegal it is truncated or limited to the nearest legal number and EXW is issued if on if requested recall location is empty an error SRQ is issued if EXR is on and the command is ignored Determines whether instrument settings designated by the DISplay LOCation are plotted Determines whether graticule is plotted Determines whether waveforms designated by the DiSpiay LOCation command are plotted RTD 710A instruction Manual Programming Command Set Table 5 10 Cont UTILITY COMMAND GROUP Header Argument Link Argument Description DEVice SETtings Returns the device mode setting GRAt WAVirm PLOt Command only Causes the instrument to output a data string whose format is determined by the DEVice command If the instrument is in acquisition when PLOt is received and is set to talker the plotting wai
103. When the high speed sample mode is selected key LED is on the operating mode of the input amplifier automatically switches to CH 1 ONLY and only the channel 1 in put is digitized at the minimum sample interval of 5 ns Channel 2 is disabled and the iae display and key LED turn off STATUS indicates the current acquisition status as follows ARN D illuminates if the trigger generator is armed and waiting for a trigger If the trigger delay is set to a minus value the ARM D indicator illuminates when the instrument completes the pretriggering write This indicator turns off upon acquisition start and while the instrument is waiting for the arm signal TRIG D illuminates when the trigger is recognized The LED turns off when the acquisition operation is started and remains off until the instrument recog nizes another trigger event RESET HOLD A push to select key with LED that controls the ac quisition start and stop as follows Steady ON The instrument is in HOLD state the last acquisition is finished and further acquisition cannot occur until the HOLD state is reset Pressing this key resets the HOLD state LED off and the next acquisition can begin with the next valid trigger event Blinking If this key is pressed during an acquisition LED off the instrument enters the HOLD state upon completion of the current acquisition the key indicator blinks during the acquisition If the key is pressed
104. ains the primary ac power source fuse PRINCIPAL POWER Switch Power line switch that controls the line input power to the RTD 710A power supply Line Voltage indicator The position of the screw indicates the internally se lected instrument operating voltage GND Connector Provides an auxiliary signal ground for use in con necting equipment under test to the RTD 710A Power Cord Receptacie Provides the instrument connection point to the ap propriate ac voltage 3 21 Operating instructions INSTRUMENT FAMILIARIZATION This subsection provides a detailed introduction to the use of the RTD 710A and its controls It is organized similar to the Controls Connectors and Indicators subsection as follows Input Trigger Time Base Recording Controi Rear Panel Simple Waveform Operation TV Trigger Option Operation INPUT The RTD 710A digitizes waveforms fed into the input connectors CH1 or X CH2 or Y with 10 bit resolution over the voltage limits set by RANGE control The input signal should be connected to the RTD 710A as instructed below to ensure that full bandwidth is maintained Probe The probe is the most convenient means of connecting the input signal to the RTD 710A A 10X or 100X shielded probe is recommended because the shield reduces outside electrical interference and the high input impedance reduces loading effects on the circuit s being measured If a 10X 100X probe contains a readou
105. ample intervals and trigger conditions 3 Set the arm delay of the first RTD 710A to a suitable value and set the rest of the RTD 710A unit to EXT ARM 4 Set the trigger mode of each RTD 710A to SGL and record mode to NORM 5 After all the RTD 710A units have been connected push each of their RESET HOLD keys beginning with the last RTD 710A and moving backwards When the first RTD 710A is reset acquisition of the waveform data begins and the waveform data is written to the first RTD 710A with the first trigger signal into the sec ond RTD 710A with the second trigger signal and so on 3 47 Operating instructions CLOCK OUT EXT CLK IN Parallel Operation Following is an example and some advantages to using multiple RTD 710A instruments in parallel operation 1 Simultaneous acquisition of more than two input d 2 Simultaneous acquisition of a single input signal under various acquisition conditions 3 Using different trigger delays for each RTD 710A to acquire slow periods of continuous data Maximum of 768K words Parallel operation may require simultaneous operation therefore a sample clock and trigger signal must be pro vided synchronously to all RTD 710As Fig 3 46 EXT EXTERNAL ann IN CLK SOURCE INT SAMPLE INTERVAL 10 nS RTD 710A lang EXT 1 TRIG MODE SGL CLK TRIG SOURCE CHI OUT EXT CLK IN CLK SOURCE EXT SAMPLE INTERVAL 2EO RTD a 2 ARM EXT TRIG MODE SGL CLK TRIG SOURCE CH
106. ared is nonexistent 263 More than 5 breakpoints were requested 266 i Invalid channel requested for setting CH2 not valid in CH1 only mode 267 Requested Data Location is out of range 268 Requested Data Start is invalid 269 Requested Data Count is invalid 270 Requested Data Bsize is invalid 271 Requested Window Channel is invalid CH2 not available in CH1 Oniy mode 272 Requested Window Location is out of range 273 Requested Window Start or Stop is out of range 274 Requested Window Level is invalid 275 Requested Waveform is invalid or not available 276 ilegal test number 277 Self test group commands are not available with TESt MODe OFF 278 i Command is not available with TESt MODe ON change to TESt MODe OFF 279 Piot is not allowed because no waveform on the display Internal Errors INR ON SRQ Status 99 or 115 System or DMA controller error Auto Calibration failed Use ERRor query for failure code NVM save or recall error checksum error Current Levei 2 test or Power On Self test error use ERRor query for failure code 350 System Event 401 Power on 403 USER ON User request l 450 OPC ON Hold occurred after N times Average or Envelope operation or after Auto ADVance operation 451 OPC ON Hold occurred in Compare Trigger mode 452 OPC ON Current Level 2 test or Power On Self test is finished 453 OPC ON Plot completed RTD 710A Instruction Manual l
107. as setting command Responds with the units of measure for the input Range value which is fixed at Volts Query oniy ignored if sent as setting command Responds with the width of the binary data field which is fixed at two bytes per point More WFMpre commands on next page 5 13 Programming Command Set Table 5 7 Cont WAVEFORM TRANSFER GROUP Header Argument Link Argument Description WFMpre BN Fmt RP BIT nr 10 BKPt NRx NRx WFMpre WFId ENCdg NR Pt PT Fmt XINcr PT Off XUNIt YZEro YOFt YMUIt YUNIt BYT nr BN FMT BIT nr BKPt WFMpre CURVe waveform data CURVe 5 14 Query only ignored if sent as setting command Responds with the binary data format of the curve data which is fixed as a right justified binary positive integer Query only ignored if sent as setting command Responds with the binary data precision which is 10 bits Sets the breakpoint location and sample interval for waveforms input by the CURVe command The first NRx defines the breakpoint location with reference to the trigger point The second NRx defines the sample interval associated with the breakpoint If BKPt 0 0 is sent it clears all previously set breakpoints If an NRx is illegal it is truncated or limited to a legal value and a warning SRQ is issued if EXW is on Reports the selected waveform preamble item ENCdg response fixed BlNary NR Pt is in NR1 forma
108. ata in two different modes normal and roll mode Whichever mode is to be used is automatically selected when the sampling interval is set When the sample interval is faster than 100 us a normal display occurs where data is displayed on the CRT monitor after the waveform acquisition is completed When the sample interval is 200 us or longer the ac quired data is displayed on the CRT monitor as it is ac quired This is a Roll mode display which displays data similar to a chart recorder Roll mode aliows a continuous view of a slowly changing signal Newly acquired data points are displayed as a continuous stream with each newly ac quired data point appearing at the right side of the CRT monitor As new data points are acquired the previous data point rolis toward the left side of the monitor creating a constant flow of data across the screen The following contro and display limitations exist in the roii mode LL 1 The roli mode will not operate with the following settings 3 34 RECORD MODE of AVE RECORD MODE of ENV CLK SOURCE of EXT RECORD LENGTH of 1K words apop 2 The horizontal and vertical display multiplier is X1 It is unchangeabie 3 Cursor display is unavailable during acquisition Any attempts to use the cursors result in termination of the acquisition i External Clock As indicated earlier there are two clock sources inter nal and external that can be selected to provide timi
109. ayed continuously on the Control display ENV The digitized waveform is continuously envel oped The number of times for enveloping can be set between 1 and 16384 in steps of 2 and 99999 infi nite envelope The setting can be altered with the Parameter Entry Knob by pressing the AVE ENV OF TIMES key after selecting ENV with the RECORD MODE key NOTE When the trigger mode is set to the compare mode the number of times for the GEO is meee ely set to 1 evening is not possible in the high speed sample mode Also breakpoint settings are ig nored in the envelope mode enveloping is per formed at the initial sample interval RTD 710A Instruction Manual CONTROL Refer to Fig 3 7 for the location of items 31 through 47 1 Control Display Displays the cursor position the zoom factors for the vertical or horizontal axes the vertical position the memory location number to be displayed on the CRT monitor or the measurement results by MEA SURE keys such as V OR AV T OR AT 1 1 OR 1 AT Also the location of the non volatile memory for storing recalling the front panel settings is indicated 82 BUSY liuminates when the instrument is executing one of the following l Compressed display LINE selected Acquisition in COMPARE trigger mode Operating Instructions Waveform analysis command Front panel or GPIB commands received when busy are executed after lamp extinguishes PARAMETER ENTRY KN
110. blocks the de component of the signal AC Attenuates triggering components beiow 60 Hz and biocks the de component of the signal LINES TV Option 05 only Time base is triggered when a TV horizontai line sync pulse is encountered FLD 1 TV Option 05 only Time base is triggered on a selected line during the first field of the TV sig nal The line number is selected with the FIELD LINE key For more information refer to Option Opera tion in the Instrument Familiarization subsection FLD 2 TV Option 05 only Time base is triggered on a selected line during the second field of the TV signal The line number is selected with the FIELD LINE key See FLD 1 comment for more information TV Option 05 Only When the coupling is changed from AC to LINES some settings automatically change as foliows When the trigger slope is set to Bl t HYS or HYS the slope is automatically set and then either or can be selected e f the Trigger display is displaying the trigger level the display is erased Also the TRIG LEVEL 1 and 2 keys are both disabled f the trigger source is set to CH 2 CH 1 is auto matically set When coupling is changed from LINES to AC no automatic change in the settings occurs When the TV trigger is switched from LINES to FLD 1 the set value of the FLD 1 line number can be displayed on the Trigger display by pressing the FIELD LINE key The TRIG LEVEL 1 key is disabled
111. bration Group Internal Waveform Analysis Group Time Base and Recording Group Time Base and Recording Group Vertical System Control Group Vertical System Control Group Vertical System Control Group Vertical System Control Group Vertical System Control Group Vertical System Control Group Service Request Control Group Service Request Control Group Cursor and Display Control Group Cursor and Display Control Group Waveform Transfer Group Waveform Transfer Group Waveform Transfer Group Waveform Transfer Group Utility Group Utility Group Cursor and Display Control Group Cursor and Display Control Group Device Trigger Group Device Trigger Group Self Test Group Error Query Group Service Request Control Group Service Request Control Group Service Request Control Group Service Request Control Group Self Test Group Utility Group Time Base and Recording Group Time Base and Recording Group Cursor and Display Control Group Cursor and Display Control Group Utility Group M Initialization Group Service Request Control Group Service Request Control Group Time Base and Recording Group Time Base and Recording Group Internal Waveform Analysis Group Internal Waveform Analysis Group Waveform Parameter Measurement Group Command MEASURE MID MINIMUM MONCAL NCROSS NUMACQ OPC OPC OVER OVER PCROSS PEAKTOPEAK PLOT RECALL RECORD RECORD REPEAT RQS RQS RUN SAMPLE SAMPLE SAVE SET SRQ S
112. breakpoint and the one to be set at this time to whatever is currently displayed The current breakpoint location in points will be displayed in Record display If the key indicator is blinking use the Pa rameter Entry Knob to set a new breakpoint While the key indicator is blinking pushing it again will select time as the units for setting the breakpoint RTD 710A instruction Manual 6307 4617204 11 5397 470 204 12 Operating instructions 2 Push the SAMPLE INTERVAL key The current breakpoint which is displayed by step 1 above will be en tered into the acquisition system The current sampie inter val will be displayed in the Time Base display While the key indicator is blinking use the Parameter Entry Knob to set the sample interval for the current memory block 3 Repeat steps 1 and 2 to set up to five 5 break points per waveform acquisition NOTE If no further SAMPLE INTERVAL or BREAK POINT settings are to be made it is recommended that an other key other than the RESET HOLD key be se lected to lock the settings Otherwise the user may move the Parameter Entry Knob accidently which will change the value for whatever key is blinking A good key to push is the BREAK POINT DISPLAY key which would allow the user to review the values of the current breakpoints and their associated sample inter vals CURSOR may be used to measure in time or clock points the location of a desired breakpoint
113. ce of a 500 pF capacitor charged to 15 KV jexcept the GPIB connector Electromagnetic Compatibility Qualifies under the test limits specified in FCC part 15 subpart J class B and VDE 087 class B without direct A D out cable RTD 710A instruction Manual B 1 Specifications Characteristic input Range Accuracy Frequency Response 3dB bandwidth Bandwidth 0 C to 40 C 40 C to 50 C AC Coupled Lower 3dB Point Limited Bandwidth Overdrive Recovery Time 5X Overdrive 2X Overdrive Crosstalk DC Zero Volt Shift Accuracy Table B 2 ELECTRICAL SPECIFICATION Performance Requirement VERTICAL SYSTEM CHANNEL 1 AND CHANNEL 2 1 1 25 1 6 2 2 5 3 2 4 5 6 2 8 sequence of 28 steps Full scale range is 1023 LSBs Center vaiue 0 V input is 512 LSBs Supplemental information 100 mV to 50 V 200 mV p p to 100 V p p Within x 0 495 for an approx 1 i KHz signal with approx 97 of ful scale amplitude when an Auto Cal is performed DC to 100 MHz DC to 90 MHz 10 H2 or less H i 20 MHz 30 MHz Recovers to within 5 of 5X or 2X overdrive signal after removal of 5X or 2X input range overdrive signal i 30 ns or less 20 ns or less From driven input with fuil scale driven to unused input with equal Input Range settings on both channels i 1 5 or less at 100 MHz 0 2 or less of full scale range when an Auto Cai is performed 0 696 or less of full sca
114. ce outputs 10 bits of digitized data from each channels A D converter plus a clock signal The inter face may be connected to an externa high speed memory to provide very long record lengths IEEE 488 INTERFACE MESSAGE PROTOCOLS The GPIB interface and its message protocols conform to the IEEE Standard 488 1978 The device dependent message protocols conform to Tektronix GPIB Codes Formats Conventions and Features standard GPIB CONNECTOR The GPIB connector is a standard IEEE 488 24 pin connector with pinouts assigned to signal lines as shown in Fig 4 1 GPIB CONTROLLER COMPATIBILITY The IEEE 488 Interface is compatible with all Tektronix desk top computers used as GPIB controllers such as the 4041 and PEP 301 It is also compatible with DEC HP and IBM PC controllers and compatible controllers IEEE 488 INTERFACE FUNCTION SUBSETS The IEEE Standard 488 defines the GPIB interface func tions and the allowed subsets of those functions The sub sets incorporated into the instrument are shown in Tabie 4 1 RTD 710A Instruction Manual Fig 4 1 IEEE 488 Interface connector 4 1 Interfacing Table 4 1 RTD 710A GPIB INTERFACE FUNCTION SUBSETS Function Capability Source Handshake SH1 Complete capability SH l Acceptor Handshake AH1 AH Complete capability Talker T or Extended T5 Basic talker serial poll Talker TE i talk only unaddress if MLA Listene
115. crosses the trigger level selected by the TRIG LEVEL 2 key HYS Generates a trigger pulse when a positive going trigger signal crosses the trigger level selected by the TRIG LEVEL 1 key The next trigger signal is not accepted until a negative going trigger signal crosses the trigger level selected by the TRIG LEVEL 2 key causing the trigger circuit to reset HYS Generates a trigger pulse when a negative going trigger signal crosses the trigger level selected by the TRIG LEVEL 2 key The next trigger signal is not accepted until a positive goirig trigger signal crosses the trigger level selected by the TRIG LEVEL 1 key causing the trigger circuit to reset For more detail concerning the bi slope and hystere sis trigger refer to the Instrument Familiarization subsection TRIGGER COUPLING A toggle key that selects the method used to couple the trigger signa to the trigger generator circuit The selected coupling mode or TV trigger for an instru ment with Option 05 is backlighted above the switch If an attempt is made to select LINES FLD 1 or FLD 2 without Option 05 the NO OPTION indi cator lights in the display section above the Param eter Entry Knob DC Couples all frequency components of the trig ger signal to the trigger generator circuitry HF REJ Attenuates high frequency triggering com ponents above 50 kHz LF REJ Attenuates low frequency triggering corn ponents below 50 kHz and
116. cted some settings are automatically changed as follows The record length is set to less than 64K words 128K words for the CH 1 ONLY mode The number of envelopes is set to 1 when the record mode is ENVelope The record location is set to last location 1 if it was last location The record mode is set to NORM if it was ADV TIME BASE Refer to Fig 3 5 for location of items 17 through 22 P Time Base Display The 7 segment dispiay indicates the current setting of the time base sample interval in seconds When an external clock is used for the time base clock the multiplier of the external clock interval is displayed SAMPLE INTERVAL A push to select key with LED When selected LED blinking this key enables setting the sampling clock interval by rotating the Parameter Entry Knob The interval can be trom 10 ns to 200 ms in a 1 2 3 4 5 6 7 8 9 sequence 5 ns can be selected in the high speed sample mode When an external clock is used for the time base the clock period multiplier for RTD 710A Instruction Manual Operating Instructions UT 5 Ld TIME BASE SAMPLE INTERVAL CLC SOURCE SAMPLE MODE INT EXT NORM OHI SPO igescc m ow puse STATUS ASM D ThIG 0 RESET 3 HOLO t eet UOS T Fig 3 5 Time base section of front panel the sample clock interval can be set from 1 to 4 x 107 in a 1 2 4 6 8 high speed mode or 1 2 3 4 5 6 7 8 9 nor
117. ctor jumper to the desired line voltage 115 V or 230 V selector lug Fig D 4 CAUTION if the power supply was removed to change its line voltage selector jumper be sure to change the Line Voltage Indicator INTERNALLY SET FOR screw on the rear pane to reflect the correct line voltage se lected by the jumper Failure to make this change may cause an operator to connect the instrument to an incorrect line voltage which may damage the instrument i 115V COM 5 Reinstall the power supply side panel Servicing instructions POWER SUPPLY SIDE PANEL ATTACHING SCREWS 230V J COM LINE VOLTAGE SELECTOR JUMPER Fig D 4 Power supply side panel and line voltage selector 8 Change the Line Voltage indicator INTERNALLY SET FOR screw on the rear pane to the correct line 6 Reinstall the power supply voltage 7 Reinstall the top cabinet cover RTD 7 10A Instruction Manual D 5 Servicing Instructions CAUTION if the power supply was removed to change its line voltage selector jumper be sure to change the Line Voltage Indicator INTERNALLY SET FOR screw on the rear panel to reflect the correct line voltage se lected by the jumper Failure to make this change may cause an operator to connect the instrument to an incorrect line voltage which may damage the instrument CRT MONITOR OUTPUT JUMPERS The output characteristics of the CRT monitor output connectors X Y and Z are contro
118. d the FIELD LINE function is automatically selected its indi cator starts blinking to indicate selection and the currently selected line number is displayed in the Trigger display The line number can be changed with the Parameter Entry Knob in a range from 1 to the maximum number of lines per frame if the highest line number is reached when setting the line number continuing to turn the knob wraps the number to the lowest number 1 Likewise turning the knob past 1 wraps to the highest number If the TV signal changes and its ines per frame changes the maximum range of lines automatically changes NOTE When acquiring a noninterlaced TV signal there is no difference between field 1 and 2 therefore the trigger occurs on the line selected whether FLD1 or FLD2 is selected System M vs Nonsystem M Once the FIELD LINE key indicator is blinking pushing the key toggles operation between a System M or Nonsystem M mode The Nonsystem M mode is indicated by a dot on the left side of the line number in the Trigger display When the System M mode is selected the sync signal line number count starts three lines before the field sync pulse RTD 710A Instruction Manual When the Nonsystem M mode is selected the sync sig nal line number is the same as the line that generates the field sync pulse Special Measurements OVERSCANNED DISPLAYS For various video mea surements it may be desirable to expand the video wav
119. d a warning SRQ is issued if EXW is on if the Trigger Delay value is changed the Cursor Position value may be limited When queried the value is NR1 Specifies the location of cursor 2 on the display See POS1 above for NRx values and other limits Reports the selected CURSor setting POS and POS2 values are in NR1 format Reports all CURSor settings Example response CURSOR ONE OFF TWO OFF SCROLL ALIGN HTD 710A instruction Manual Header DiSpiay DiSplay DiS play HZOom HZOom Argument CHAnnet LOCation MODe INTerpot CHAnnel LOCation MODe INTerpo X1 128 X1 64 x1 32 X1 16 X1 8 X1 4 X1 2 X1 x2 X4 X8 X16 Programming Command Set Table 5 5 Cont CURSOR AND DISPLAY CONTROL GROUP Link Argument CH1 CH2 NRx YT XY DOT LINe Description Selects which display channel is programmed by DiSpiay LOCation VZOom and VPOsn Selects the waveform memory record of the channel to be displayed NRx 21 to 256 CH1 or HiSpd mode lt NRx gt i 1 to 128 DUAI mode H lt NRx gt does not meet the other function settings or is out side range it is truncated and limited to a legal value and a warning SRQ is issued if EXW is on When queried the value is NR1 Selects the display mode Both channels must be displayed for XY mode if the Vertical Mode is set to CH1 Only XY mode is not allowed if XY is selected in CH1 Only or HIiSpd mode
120. data to be saved in the waveform mem ory For example if the trigger delay is 400 then 400 points of the pretrigger data is recorded Fig 3 22 POST TRIGGER OPERATION In post trigger operation only data following the trigger is acquired When the ARM signal occurs waveform data is acquired Upon receipt of the trigger the TRIG D indicator illuminates and the TRIG ARM DELAY ELAPSED i Y BEGUN ONE RECORD FOR PRE TRIGGER DATA PRE TRIGGER RANGE 400 a TRIGGER RECEPTION p H PV DELAY COUNT DELAY count begins When the TRIG DELAY expires one record of waveform data is acquired If the TRIG DELAY value is 0 data is acquired immediately after the trigger is received Fig 3 23 NOTE There is approximately a 30 ns timing delay between trigger occurrence and trigger recognition in the RTD 710A This timing delay should be taken into account for the pretrigger ng setting TRIG DELAY setting when the actual trigger occurrence is important For example when the sample interval is set to 10 ns the RTD 710A recognizes the trigger 3 clocks after the actual trigger occurrence The trigger point on the waveform is displayed by an intensified dot which is the recognized trigger point The actual trigger oc curred 3 clocks before the displayed point External Trigger The trigger signal can be obtained via CH1 and CH2 in put channels when the trigger source is set to INT ernal Wh
121. desirable to use a sample frequency as high as possible However a disadvantage of using a high sample frequency is that it reduces the record time When a slowly changing signal inciudes a fast signal more effective recording can be achieved by using the sample rate switching Setting Sample interval To set the Sample Interval 1 Select the CLK SOURCE INT or EXT 2 Push the SAMPLE INTERVAL key The sample inter val or external division ratio will be displayed in the Time Base display If the key indicator is blinking use the Param eter Entry Knob to set a new sample interval With an internal clock source and a high speed sample mode the SAMPLE INTERVAL can be set to 5 ns or 10 ns to 200 ms With an internal clock and normal sample mode it can be set from 10 ns to 200 ms In either case the sam ple interval can be set in a 1 2 3 4 5 6 7 8 9 sequence e g 10 ns 20 ns 30 ns 200 ms 3 33 Operating Instructions With an external clock source the division ratio of the clock signa being input through the rear panel EXT CLK IN connector can be set This division ratio sets the sampling interval of the divided clock signal The division ratio that is displayed is defined as N X 10M where N 1 2 3 4 5 6 7 B or 9 and M 0 7 normal and where N 1 2 4 6 or 8 and M 0 7 high speed For example if the division ratio is 1 10 1E1 is displayed Roll Display Mode The RTD 710A displays acquired d
122. documentation provides information necessary to install operate and service the instrument It consists of e an instruction Manual that describes the instrument tells how to prepare the instrument for use explains the controls and connectors provides operator familiarization includes the IEEE 488 command set and program ming examples and provides instructions for internal contro settings and rackmounting instructions for service personnel e an optional two volume Service Manual that provides information for qualified service personnel to trouble shoot repair and calibrate the instrument e an Instrument Interfacing Guide that helps the user get started using the instrument by providing more detailed interface and programming information Table 0 1 lists the Tektronix part numbers and titles of the available RTD 710A documentation Table 0 1 RTD 710A DOCUMENTATION Part Number Document Title 070 7204 00 Instruction Manual 070 7292 00 Service Manual Volume 1 070 7293 00 Service Manual Volume 2 070 7207 00 instrument Interfacing Guide RTD 710A instruction Manual l i Preface ABOUT THIS MANUAL The RTD 710A Instruction Manual introduces you to the instrument and helps you learn how to use it It contains the following sections and appendices Section 1 General Information contains an instrument description a list of standard accessories and a list of optional accessories Section 2 Preparation for Use con
123. e form vertically beyond the limits of the screen Under these circumstances the Trigger amplifiers or the sync separator circuitry may be overloaded blocking out sync pulses in the vicinity of large signal transitions or losing sync pulses alto gether Therefore to avoid overload problems use the ex ternal trigger input to supply a constant amplitude trigger signal to the TV Option while the observations are being made on the expanded waveform RF INTERFERENCE Operation in the vicinity of some FM and TV transmitters may impress objectionable amounts of rf signal energy on the input signal even when coaxial cables are used to make the signal connections Us ing the 20 MHz BW limit feature will usually eliminate such interference from the display but it does not limit the signal reaching the TV Option circuitry Where the rf energy inter feres with the TV triggering operation external filters will be required to limit the bandwidth of the trigger signal In such cases it is recommended that the external trigger input be used to supply the trigger signal using the required external bandwidth limiters and attenuators to obtain the necessary trigger amplitudes Identifying Fields Frames and Lines in 525 60 and 625 50 TV Systems NTSC CCIR SYSTEM M Field 1 is defined as the field whose first equalizing pulse is one full H interval 63 5 uS from the preceding horizontal sync pulse The Field 1 picture starts with a full line of v
124. e the front pane BUSY indi cator is lighted Fig 3 41 Dot waveform display Fig 3 42 Line waveform display VERTICAL ZOOMING Vertical zooming provides a means to expand or compress the vertical range of the waveform display on the CRT monitor Pressing this key first starts vertical zooming pressing it again selects the channel While the VERT ZOOM key indicator is blinking use the Parameter Entry Knob to set the zooming factor which can be selected in a ratio of 1 4 1 2 1 2 4 8 16 or 32 3 45 Operating instructions The expansion feature of vertical zooming is useful for examining the vertical waveform in greater detail because it decreases the full scale range of the acquired waveform whenever the vertical zooming factor is greater than 1 For example the full scale range is 100 mV when the Input RANGE setting is 100 mV and the vertical zooming factor is 1 When the vertical zooming factor is set to 2 4 or 8 the equivalent full scale range decreases to 50 mV 25 mV and 12 5 mV respectively The compression feature of vertical zooming is useful with two channel display because both waveforms can be positioned for easy viewing using the vertical zooming and vertical positioning features NOTE When vertical zooming is compressed the voltage ac curacy may be decreased by a factor of the zooming ratio VERTICAL POSITIONING The vertical position of wave form data can be independently set
125. e Parameter Entry Knob changes the horizontal zoom of the dis played waveform by the factor indicated on the Con troi display Possibile zoom factors are between 16 and 1 128 times in multiples of 2 or 1 2 however the lower limit depends upon the record length and is limited to 2K words per record length For exam pie if the record length is 4K reduction to 1 2 is possible but if the record length is 1K or 2K reduc tion is not performed SCROLL A push to select key used to set the scrolling mode of CURSOR 1 When ALL default value is selected simultaneous scrolling of the displayed waveform for channels 1 and 2 is possibile If the mode is set to IND ependent only the displayed waveform for the channel selected by CURSOR 1 is scrolled RTD 710A Instruction Manual SETTINGS SAVE LOC and RECALL LOC Push to select keys with LED that allow all front panel settings to be saved in the non volatile mem ory and recalled When the SAVE LOC key is pressed once key LED starts blinking rotating the Parameter Entry Knob changes the memory location number indicated on the Control display The mem ory locations range from 1 to 20 A minus sign indicates that the displayed memory location con tains previously saved settings Pressing the SAVE LOC key while the LED is blinking saves all the front panel settings in the displayed memory lo cation The memory location number blinks during the saving process Usage of the
126. e RESET HOLD key which should extinguish the key indicator or by receiving a HOLd RESet command over the GPIB To protect the data in waveform memory no data acquisitions can occur while the HOLD status is set If the HOLD status is set during waveform acquisition the data display integrity varies depending on the point in the acquisition where the HOLD status was set This i is de tailed in Tables 3 8 and 3 9 When the HOLD status is forcibly set once between the reset for the acquisition start and the occurrence of the ARM D event the display conditions of Table 3 8 apply When the HOLD status is set once between the occur rence of the ARM D event and the end of acquisition the display conditions shown in Table 3 9 apply 3 36 Tabie 3 8 DISPLAY CONDITONS RESET TO ARM D Record Mode Normal 1 Display Data 2 Display Effectiveness Display 1 Last acquired data in present location 2 Depends on the status of previous acquisition 1 Gives average of up to last acquisition 2 All data valid Average count 22 Average 1 Last acquired data in count f present location 2 Depends on the status of previous acquisition Envelope 1 Gives envelope of up to count z 2 last acquisition 2 All data valid Envelope 1 Last acquired data in present location 2 Depends on the status of previous acquisition count 1 1 Data of the record
127. e between two mode selections key indicator turns on or off to indicate selection All push to select keys except two MAN TRIG and BREAK POINT CLR have self contained LED status indi cators Depending upon the key function these indicators have one of three meanings a lf the control has a settable numeric value a blinking LED means that the value displayed in the 7 seg ment LED display above the control is the current setting and the value can be changed with the Pa _ rameter Entry Knob b tf the control has no settable numeric values an OFF LED indicates one mode selection while an ON LED indicates another mode selection Toggle Keys Toggle keys are physically pushed up or down to perform their electrical operation On the RTD 710A those keys are used to sequence up or down through multiple function se lections The status of any selection is identified by its backlighted function name Operating instructions INPUT TRIGGER TIME BASE RECORDING CONTROL LE a TEL AR MEE RN OTT pun RM RTD7 OA n Busty NO OPTION MRLGER m7 Deu RAM menn TAE TITTEN 75 EPI PESES va S aui ami oat LUI D 1 CONNECTORS AND POWER 6397 80 7290 1 Fig 3 2 RTD 710A Digitizer front panel INPUT Refer to Fig 3 3 for location of items 1 through 7 Q input Display 7 CHIINPUT on D CH2 INPUT or KI 2 RANGE OFFSET EY OFFSET 5 s VES feni r M son For each channel displays the input vol
128. e signal is sampled cor rectly the envelope shows the signal with its maximum and minimum l If the input signal contains frequency components high enough to cause aliasing even at a 100 MHz sample fre quency the use of a filter to eliminate components of fre quencies higher than the Nyquist frequency 1 2 of sample interval frequency is recommended If the sample frequency is an integral multiple of the input signal frequency even when the former is much higher than twice the input signal frequency interference stripes appear as shown in Fig 3 28 This is called perceptual aliasing a sort of visual illusion caused by dot representation Fig 3 28 Display with perceptual aliasing in Fig 3 29 where the abscissa of Fig 3 28 is expanded by 8 the display shows that the input signal is a high frequency signal rather than a low frequency signal as Fig 3 28 would seem to indicate RTD 710A instruction Manual Operating instructions in a normal display interference stripes appear because adjacent dots are visually connected in contrast to aliasing that occurs with signals of higher frequency than the Nyquist frequency perceptual aliasing does not prevent faithful analysis of waveforms in order to avoid perceptual aliasing it is necessary to select a sample frequency as high as possible Fig 3 29 Redisplay of perceptual aliasing expanded by 8 To eliminate aliasing and reduce perceptual aliasing it is
129. e starts on line 336 full line The first field is referred to as odd and the second field as even Note that the identification systems for System M and System B are reversed In the four field PAL sequence with Bruch Sequence color burst blanking the fields are identified as follows Field 1 Field that follows a field ending in a half line of video when preceding field has color burst on the last full line Field 1 lines are 1 through 312 and half of line 313 Color burst starts on line 7 of Field 1 a half line of video appears on line 23 Field 2 Field that follows a field ending in a full line which does not carry color burst Field 2 lines are the last half of line 313 through line 625 Color burst starts on line 319 one line without burst following the last equalizing pulse a full line of video appears at line 336 Field 3 Field that follows a field ending in a half line when preceding field has no color burst on its last full line Field 3 lines are 1 through the first half of line 313 Burst starts on line 6 immediately following the last equalizing pulse a half line of video appears on line 23 Field 4 Field that follows a field ending in a full line carry ing color burst Field 4 lines are the second half of line 313 through line 625 Color burst for Field 4 starts on line 320 two full fines without burst follow the fast equalizing pulse video starts with a full line on 336 6 3 Options N
130. e waveform transmission For proper interpretation of curve data a minimum preambie for the selected waveform destination must be transmitted before any waveforms are sent Subsequent preambles that are sent need only trans mit changed information Curve data associated with the preamble should be stored together Following is a sample preamble WFMPRE WFID CHI LOCATION7 ENCDG BINARY NR PT 8192 PT FMT Y XINCR 5 0E 9 PT OFF 0 XUNIT SEC YZERO 0 YOFF 512 YMULT 100 0 3 YUNIT V BYT NR 2 BN FMT RP BIT NR 1C BKPT 0 5 0E 9 CURVe CURVe Command The CURVe command transmits waveform point data to the RTD 710A using the following format CURVE waveform data where waveform data is set either to binary block data or to arbitrary block data by DATa BFOrmat command When binary block data is selected the for mat of the waveform point data is as follows RTD 710A Instruction Manual Programming Command Set binary block data lt binary count binary point checksum byte count A 2 byte binary number repre senting the total number of data bytes plus checksum 10 bits With 10 bit resolution each waveform data point is transferred in two bytes high byte first then low byte The 2 MSBs most significant bits of the 10 bit waveform data are transferred as the 2 LSBs least significant bits of the high byte the remaining six bits of the high byte are set to zero T
131. eate curve data array curve 200 Send DATA command to set channel to CH1 loca tion to 1 start to 400 count to 2048 block format to binary block size to 2048 210 Send REPEAT 10 command 220 Input one set of waveform data 10 times curve i 240 250 End of main program 1000 SRQ handling subroutine which performs a serial poll and inputs the event code 1060 NOTE Set CH1 and CH2 displays to zero off for faster throughput RTD 710A Instruction Manual SPS BASIC Example 100 REM Repeat acquisition 10 times from CHI 110 REM loc 1 120 REM start 400 count 2048 120 REM block format binary block size 2048 130 REM 140 LOAD GPI 150 OPEN 2 AS WAVE DAT FOR WRITE 160 PUT DAT CHA CH1 STA 400 C0U 2048 BFO BIN BSI 2048 into 80 33 170 PUT REP 10 INTO 60 33 180 INTEGER H 8 W 2047 190 IFDTM 0 UNP 200 FOR I 1 TO 10 210 GET H FROM 80 65 220 IFDTM GO PAK HBF 230 GET W FROM 80 65 240 IFDTM 80 UNP 250 GET CS FROM 60 65 260 WRITE 2 W 270 NEXT I 280 CLOSE 2 290 END Program explanation 140 Load the interface driver 150 Open file WAVE DAT as logical unit 2 160 Send DATA command to set block size to 2048 170 Send REP 10 command 180 Create header array H and waveform data array l W 190 Set interface to accept unpacked data 200 Acquire data 10 times 270 280 Close logical unit 2 file WAVE DAT 290 End of program Saving Recalling Fr
132. ed IRE EORR 3 38 Breakpoint waveform with post Mica 3 39 Breakpoint waveform with pre trigger 3 39 Auto advance representation 3 41 Envelope peak detection 3 41 Enveloping two or more times 3 42 Envelope display siio v rr 3 42 Normal waveform display seta satey eaten 3 44 Fig No 3 40 3 41 3 42 3 43 3 44 3 45 3 46 3 47 3 48 3 49 3 50 3 51 3 52 3 53 4 1 4 2 4 8 4 4 4 5 4 6 5 1 5 2 5 3 6 1 6 2 6 3 6 4 D 1 D 2 D 3 D 4 D 5 D 6 D 7 D 8 D 9 D 10 D 11 D 12 D 13 D 14 Page Horizontal zoom display lis 3 45 DOT waveform display 00 3 45 Line waveform display 3 45 YT waveform display issues 3 46 XY waveform display lisse 3 46 Serially connected RTD 710As 3 47 Parallel connected RTD 710As 3 48 Simple waveform acquisition display 3 49 Transient waveform acquisition display 3 50 Transient waveform acquisition with a breakpoint es sd Ro acte weed erfvs 3 51 Voltage measurement with CURSOR 1 3 51 Voltage measurement with 4X horizontal ZOOM neu ederet ug rU ue dr ar RR C a aet 3 52 Amplitude measurement with CURSOR 1 and dau Ree Aetio x oes ER rn 3 52 Frequency measurement with CURSOR 1 Bd uoces conrad drat cei News Tap e aas 3 53 IEEE 488 Interface connector 4 1 GPIB parameter switch 4 2 Direct A D output port connector
133. el controls connectors and indi cators are divided into six functional groups Fig 3 2 input Trigger Time Base Recording Control Connectors and Power The front pane window is divided into six 7 segment LED displays CH1 Input CH2 Input Trigger Time Base Recording and Control Each display indicates the setting or value of an associated key Three types of controls are used on the front panel a rotary knob push to select keys and toggle keys The op eration of each control type is described below Rotary Knob The rotary knob is called the Parameter Entry Knob see item 32 Figure 3 7 It is used to modify the current setting of a key that has been selected LED blinks with a push to select key The Parameter Entry Knob can be ro tated infinitely in either direction to increase or decrease the setting value Once a value reaches its design limit V TAa rotation of the knob has no effect RTD 710A Instruction Manual Push to Select Keys The physical operation of the push to select keys is self explanatory However these keys perform electrically in two ways Some select their associated function LED blinks to allow a change in setting via the Parameter Entry Knob also if the setting can be displayed in two units of measure pressing the key with its indicator blinking alter nates the displayed units The indicator on the selected key blinks until another key is selected The other keys simply toggl
134. emory The number of auto advance locations is set by the RECORD LOCATION key Maximum is 128 1K lengths for DUAL vertical mode or 256 1K lengths for CH1 ONLY mode The location is automatically incremented after each record is acquired until the specified number of locations is reached The acquisition dead time between the last record acquired and the next triggerable event is set by ARM DELAY When an acquisition is started the input signal is first captured into record location 1 After the first acquisition is compieted the RTD 710A will arm then wait for the next trigger signal before starting the next acquisition The next acquisition is captured into record location 2 This process continues until the specified number of locations is reached If the display location is not 0 then the waveform display is updated after each acquisition Acquisitions are made at the maximum rate when ARM DELAY and DISPLAY LOCA TION are set to 0 To set the Auto Advance mode 1 Set RECORD MODE to ADV 2 Press the RECORD LOCATION key When selected its indicator blinks and the current record location is dis played in the Recording display RTD 710A instruction Manual Operating Instructions INPUT SIGNAL 128K WORDS es ESOS el aur Fa a ck a fa al OM 16K WAVEFORM viros aND Pay n VV WAVEFORM 1 2 3 4 5 6 7 8 i i i ue NOTHING WRITTEN i e 1st 2nd 3rd 4th RECORD RECORD RECORD RECORD
135. emperature within its specified operating temperature 1 Connect the power cord to the instrument and plug it into a power source 2 Turn on the Principal Power Switch on the rear panel of the instrument This connects the ac power to the power supply RTD 710A instruction Manual 3 Turn on the ON STANDBY switch on the front panel This connects power to the instrument and initiates the self test function Most of the power on and self test indications occur too quickly to be noticed however as each self test is per formed its module number is displayed in the Trigger display if the power on self tests are successfully completed control setting initialization occurs and the instrument is ready for use if an error is detected during the power on self tests an error code is displayed in the Contro display and the instru ment enters a Level 2 Extended Diagnostics mode To exit this mode to attempt normal operation push the RECALL LOC key The error code is in the format EXXXXX where xxxxx is the error code If a fatal error in the operating system occurs no error code can be displayed and the instrument should be re ferred to qualified service personnel for further diagnostics and repair Operating Instructions OPTION 19 ONLY Blank Front Panel The power on sequence for Option 19 is the same as for the standard instrument except 1 The front panel ON indicator iliuminates when the in strume
136. en co 3 2 CRT MONITOR SETUP ss 3 4 CONTROLS CONNECTORS AND INDICATORS Leber aAA REESE Een 3 5 RTD 710A Instruction Manuai Page Section 3 OPERATING INSTRUCTIONS cont FRONT PANEL sese nep oo pos 3 5 Rotary Knob ovv 3 5 Push to Select Keys 3 5 Toggle Keys i eid es y 5 INPUT Cea Nea cena ide Yea eds 3 6 TRIGGER 52r dup dea P pm 3 8 TIME BASE ss creek n AE RO ESI d 3 11 RECORDING 12 4002 vr ES RE 3 12 CONTROL s bos dic cds xen 3 15 CONNECTORS AND POWER 3 19 REAR PANEL dE A ae 3 20 INSTRUMENT FAMILIARIZATION 3 22 INPUT A i345 Sa keer er vieles 3 22 Probe MORIR 3 22 Coaxial Cable ode an eae 3 22 RANGE Key srantos pei 3 22 COVEFTADUBL ics Du Easy ie ia e 3 23 OFFSET Key oceoc Sew tees 3 24 Input Bandwidth Filter 3 24 Automatic Calibration AUTO CAL 3 24 TRIGGER iosop eieae 8 25 Trigger Source inet cd 3 25 Trigger Slope and Level 3 25 BE SLOPE ixi ERREUR 3 25 HYS SLOPE ens 3 26 Trigger Mode os ARR xe 3 27 AUTO rerba adde ne in 3 27 NORMI al avec ct xad x 3 27 SGL Single nen e eh 3 27 COMP IN COMP OUT 3 27 Manual Trigger 5 3 28 Arm Delay oec oU PEE 3 28 INTERNAL ARM DELAY 3 29 EXTERNAL ARM DELAY 3 29 Trigger Delay oss ce dines 3 29 PRE TRIGGER OPERATION 3 30 POST TRIGGER OPERATION 3 30 External Trigger sess 3 30 TIME BASE vts ba w 3 31 Sample Interval 0 0
137. en the displayed waveform requires another trigger source the desired trigger signal can be input via the EXT TRIG input connector by setting the trigger source to the EXT ernal position Since the external trigger fuil scale signal range is x5 V the voltage display levels for the trigger differs from that used for internal triggers RECORD LENGTH 2048 TRIGGER DELAY 400 TRIGGER ACQUISITION TERMINATED BEGUN POST TRIGGER REGION 3 2048 400 ACQUIRED DATA Fig 3 22 Pre trigger operation 3 30 RTD 710A Instruction Manual ARM D LAMP ON TRIGGER i te WRITE BEGUN Ha DELAY COUNT 1024 i i EE Ja TRIGGER RECEPTION BEGUN Operating instructions RECORD LENGTH 2048 TRIGGER DELAY 1024 ACQUISTION TERMINATED ACQUIRED DATA 2048 6397 36 7 204 7 Fig 3 23 Post trigger operation TIME BASE Sample interval The RTD 710A samples the analog input signal at dis crete time intervals then A D converts quantizes the sam pled voltage ieveis at sampled time points and stores the digitized data into waveform memory To acquire the analog input signal accurately the sample interval must be selected carefully Figure 3 24 shows an example of an input signal that has been sampled at a rate of about 400 times its fre quency and digitized while Fig 3 25 shows an input analog signal sampled at about 50 times its frequency and digitized The am
138. ent to the following in dividual commands CH1 RANge 10 CH1 COUpling AC CH1 OFFset20 Multiple Commands Multiple commands may be included on the same program line as long as they are separated by semicolons for example CH1 RANge 10 TRiqger MODe AUTo where CH1 and TRigger are the headers for separate commands Link Arguments Link arguments are used only in conjunction with argu ments to define a specific setting to make vaiue to set 5 2 etc These link arguments may be alpha characters or numeric formats The usable alpha characters are specifically defined in the command set for example CH1 COUpling AC GND DC TvClamp where AC GND DC and TVClamp are the alpha link arguments Whenever a numeric link argument is required it is shown as NRx in the command set for example CH1 RANge NRx where lt NRx gt must be a numeric value in one of the NR1 NR2 or NR3 formats shown in Table 5 1 NOTE All scientific notation numbers having the exponen tial E must have a plus or minus sign preceding the exponent The E may be entered in either uppercase or lower case Numeric arguments may contain both signed and un signed numbers unsigned numbers are considered positive When numeric values are returned as a result of a query the format NR1 NR2 or NR3 will be specified in the command set The instrument accepts any numeric argument but may truncate and limit the n
139. equested Trigger Delay value was truncated or limited Requested Sample Interval value was rounded or limited or Sampling Mode was forced to Normal 10 nS Requested Break Point address was truncated or limited Requested Average number of times was truncated or limited Requested Envelope number of times was truncated or limited Requested Cursor 1 Position value was rounded or limited Requested Cursor 2 Position value was rounded or limited Requested Horiz Zoom value was limited Requested Vert Position value was limited Requested Display Location number was limited Requested Save or Recall location number was limited XINCR vaiue for WFMPRE was rounded or limited PT OFF vaiue for WFMPHE was rounded or limited YZEro value for WFMPRE was rounded or limited YMUIt value for WFMPRE was rounded or limited Break Point value for WFMPHE was rounded or limited Requested REPEAT count was rounded or limited Waveform data STArt or STOp number was swapped because requested STArt position is larger than the STOp position or requested STOp position is smaller than the STArt position Device Dependent Event 750 WRI ON Single acquistion sequence is completed and the waveform in memory is ready to be read 752 OVER ON OVER ON 754 OVER ON 755 OVER ON 753 CH1 input overrange has occurred CH1 input underrange has occurred CH2 input overrange has occurred CH2 input underrange has occurred RTD
140. es sage is parsed but cannot be executed Internal Error An internal error occurs on a malfunction or fault condition within the RTD 710A System Event A system event includes all events that are not errors warnings Or device dependent events Execution Warning An execution warning occurs when a command is being executed but a potential problem may exist Device Dependent Event A device dependent event is one that is instrument function specific A 1 SRQ Status Bytes and Event Codes Table A 1 RTD 710A STATUS BYTES BINARY DECIMAL RQS ON RQS OFF Bit Not Not TITLE 7654 3210 Busy Busy Busy Busy Priority System status Command Error OR1X 0001 97 113 33 49 2 Execution Error OR1X 0010 98 114 34 50 2 internal Error OR1X 0011 99 115 35 5j 2 Power Fail OR1X 0100 100 116 36 52 d 2 Execution Warning OR1X 0101 101 117 37 53 2 Power ON 010X 0001 65 81 1 17 1 Operation Complete OROX 0010 66 82 2 18 2 User Request OROX 0011 67 83 3 19 2 No Status To Report 000X 0000 0 16 0 16 3 Device Dependent Status Waveform Data Write 192 218 End for Time Base A Input Over Under Range 193 i 219 Device Dependent TURNS RQS Bit Error Bit Busy Bit tt NN A c o d 1R is set to 1 when the GPIB RQS mode is set to RQS ON If the RTD 710A is in the RQS OFF mode and polled the status byte is sent without DIOG asserted X is the busy bit and is set to 1 if the RTD 710A is busy when the status b
141. es from 1 to 4x10 in a Sampling Mode 1 2 3 4 5 6 7 8 9 normal or 1 2 4 6 8 high speed l sequence l Allowable values are derived as follows Sample Interval clock x 10 where x 1 2 3 4 5 6 7 8 or 9 normal or 1 2 4 6 or 8 high speed and Y 0 7 Roll Mode 200 us or greater For internal clock source only interval Switching Sample interval can be switched coherently between the 5 breakpoints per record allowed B 6 i ATD 710A Instruction Manual Specifications Tabie B 2 cont Characteristic Performance Requirement Supplemental information RECORDING Wavetorm Memory Size 131072 10 bit words per channel Waveform Memory Format CH 1 Mode May be partitioned into 1 record of 262144 words 2 records of 131072 words 4 records of 65536 words 8 records of 32768 words 16 records of 16384 words 32 records of 8192 words 64 records of 4096 words 128 records of 2048 words 256 records of 1024 words DUAL Mode May be partitioned into l 1 record of 131072 words 2 records of 85536 words 4 records of 32768 words 8 records of 16384 words 16 records of 8192 words 32 records of 4096 words 64 records of 2048 words 128 records of 1024 words Breakpoint Position 1 to 5 breakpoints allowed per record With internal clock source Break Point position may be entered in points or time Time is calculated as Time points Sampie interval rounded to 5 digits Nor
142. essed MLA it responds to the Selected Device Clear SDC message in the same man ner as for the Device Clear DCL message otherwise it is ignored Remote Enable REN The REN signal line must be true and the instrument ad dressed MLA before it will respond to commands Once this condition occurs and the REN signal line is false the REN MLA combination must again occur before commands are recognized Messages sent to the instrument while the REN signal iine is false and EXR is ON cause an Execution Error SRQ For additional information on the REN signal line see the Remote Local Function topic below My Listen Address MLA and My Talk Address MTA The MLA and MTA messages which are received when the Attention ATN signal line is true condition the instru ment to receive commands or respond to queries or serial polis These messages consist of the decimal values for the MLA which is 32 the address set by the GPIB Param eter Switch or for the MTA which is 64 4 the address set by the GPIB Parameter Switch For example if the GPIB Parameter Switch is set to 1 MLA is 33 and MTA is 65 Unlisten UNL and Untalk UNT The UNL and UNT messages which consist of the deci mal values 63 and 95 respectively cancel any preveiousiy received MLA or MTA messages Group Execute Trigger GET The instrument will respond to a GET message if the Device Trigger command DT is ON and the trigger circuit is ARM d I
143. f the trigger circuit is not ARM d the GET message is ignored If DT is OFF and EXR is ON the instrument responds to the GET with an Execution Error SRQ RTD 71 OA instruction Manual Interfacing Go To Local GTL The GTL message is used to return the instrument from remote operation Once this message is received the instru ment must be readdressed MLA before it will respond to commands REMOTE LOCAL FUNCTION When the instrument powers up it defaults to the oca state LOCS and neither its GPIB REM nor LOCK indi cators are on in this state all front panel controls are fully operational i When the Remote Enable REN signal line is true and the instrument is addressed with a My Listen Address MLA message it enters the remote without lockout state REMS and its GPIB REM indicator turns on While in this state it can be controlled only by the Programming Com mand Set The instrument can be returned to the Loca state LOCS by pushing any front panel key except RQS ID or by sending a Go To Local GTL message or by cycling the power switch If the instrument receives a Local Lock Out LLO mes sage while in the remote without lockout state REMS it enters the remote with lockout state RWLS In this state both the REM and LOCK indicators are on and all front panel controls are locked out except the RQS ID key From this state the instrument is returned to the oca state LOCS by setting the REN si
144. for the input amplifiers and A D converters is included Auto Cal performs three functions 1 DC Calibration 2 Gain Calibration 3 Phase Calibration The DC Calibration function compensates the DC level of the input amplifiers to ensure the digitizing of the dc level of the input signal The Gain Calibration function generates a 1 KHz square waveform which is used to compensate the gain of the in put amplifiers to ensure a direct correlation between the Input Range setting and the full scale range of the A D converter The Phase Calibration function generates a 28 57 MHz sawtooth waveform which is used to adjust the sampling clock phase when the high speed sampling mode is se lected In the high speed sampling mode the signal input at the CH1 input connector is simultaneously input to both in put amplifiers By shifting the sample clock phasing be tween the A D converters by exactly 180 a high speed sampling of up to 5 ns is achieved Any shift in the 180 phase relationship between the A D converters results in a deterioration of accuracy for high frequency input signals The Phase Cal function corrects the phase shift to maintain phase shift at 180 The Auto Cal function is automatically initiated on any of these conditions 1 The AUTO CAL key is pushed or the AUToca com mand is received over the GPIB 2 The RANGE BW LIM 20 MHz SAMPLE MODE or CLK SOURCE is changed either from the front panel or over
145. from either pole of the power source must not exceed the maximum rated operating voltage 250 volts Before making connection to the power source deter mine that the instrument is adjusted to match the volt age of the power source and has a suitable plug two pole three terminal grounding type All accessible conductive parts are directly connected through the grounding conductor of the power cord to the grounding contact of the power plug Therefore the power plug must only be inserted n a mating re ceptacle with a grounding contact Do not defeat the grounding connection Any interruption of the ground ing connection can create an electric shock hazard High leakage current ensure proper grounding instruments are shipped with the required power cord as ordered by the customer Information on the available power cords is presented in Table 2 2 and part numbers are listed in Section 6 Instrument Options Contact your Tektronix representative or local Tektronix Field Office for additional power cord information RTD 7104 instruction Manual Preparation for Use Table 2 2 POWER CORD AND PLUG IDENTIFICATION INFORMATION Plug Nominal Reference i Ostion 3 Configuration Usage Line Voltage AC Standards ais aR TE H i North American ANSI C73 11 120V 15A 120V NEMA 5 15 P STANDARD IEC 83 MERI ER rte EN ee See NUR ay fo Universal Euro CEE 7 HH IV VII 220V 16A 240
146. ger signal is either the channel 1 or channel 2 input When EXT is selected the key LED lights and the signa supplied to the EXT TRIG N connector located on the front pane becomes the trigger signa source CH 1 CH 2 A push to select key with LED that al ternately selects either channel 1 or channel 2 as the trigger signal source when the TRIG SOURCE INT EXT key has been set to INT internal source When channel 2 is selected the key LED lights Channel 2 cannot be selected if in high speed sam pie mode or the trigger coupling switch is set to TV MAN TRIG Manuaily triggers acquisition if the time base is armed the ARM D indicator is on and Hold is OFF This key is disabled when the ARM D indicator is off SLOPE A toggle key that selects the slope of the trigger signal in the following sequence default value Bl x HYS HYS or in the reverse order The LED of the selected trigger slope lights Each trigger slope is described below Generates a trigger pulse when a positive going trigger signal crosses the trigger level selected by the TRIG LEVEL 1 key 3 9 Operating instructions 3 10 Generates a trigger pulse when a negative going trigger signal crosses the trigger level selected by the TRIG LEVEL 1 key B Xy Generates a trigger pulse when a positive going trigger signal crosses the trigger level selected by the TRIG LEVEL 1 key or when a negative going trigger signal
147. ger source is an internal signal the display shows the trigger level in percentage of the input range of the selected trigger source channel When the trigger source is an exter nal signal the display shows the trigger level in per centage of the external trigger source voltage level 5V is 100 V Displays the trigger level in V or mV The setting range and resolution are the same as for display The display is rounded to three digits NOTE Because the trigger level is always calculated in percentage of input range its displayed value which is in volts is automatically changed as the input voltage range Js changed Depending on the setting of the trigger slope refer to the TRIG SLOPE description the trigger level keys are set as shown in Table 3 3 Table 3 3 TRIGGER LEVEL SETTINGS Trigger Level To Be Set Trigger Slope i i i Level 1 Key Level 2 Key Positive or Not used negative slopes Or Positive slope Negative slope Reset level i Negative slope Trigger level HYS i Positive slope HYS Reset level Trigger level Positive slope Negative slope FIELD LINE TV Option 05 only When the trig ger coupling switch is set to FLD 1 or FLD 2 the FIELD LINE TRIG LEVEL 2 key and Parameter Entry Knob set the line number within a field which triggers acquisition of input TV signals in this case the LED of the FIELD LINE
148. gnal line faise If an LLO message is placed on the GPIB while the REN signal line is true the instrument enters the ocal with lock out state LWLS in this state all front panel controls re main operable until the instrument is addressed placing it in the remote with lockout state RWLS While in the oca with lockout state LWLS the control ler can place the instrument into the remote with lockout state RWLS by simply sending a MLA message to the instrument in this state both the LOCK and REM indicators are on none of the front panel controls can be used except the RQS ID key and only the controller can return the in strument to the oca state LOCS by setting the REN signal line false Interfacing GPIB RQS iD KEY When this key is pressed the LED display above the Control section shows the address set on the GPIB Param eter Switch for about one second If the Service Request command USEr is ON pushing the key aiso generates an SRQ to the controller and reports instrument status Its LED turns on whenever an SRQ is generated GPIB COMMAND SET Refer to Section 5 PROGRAMMING COMMAND SET STATUS BYTES AND EVENT CODES Refer to Appendix A SRQ STATUS BYTES AND EVENT CODES A D OUTPUT INTERFACE Whenever the instrument is acquiring a waveform ECL compatibie digital data is sent to the A D Output Port Each data bit and clock signal is sent as a differential signal For more details on specifications
149. he remain ing 8 bits of waveform are trans ferred as the low byte Fig 5 1 binary point checksum The 2s complement of the modulo 256 sum of the preced ing binary count and binary point i When lt arbitrary block data gt is set the format of the waveform point data has the following structure arbitrary block data number of digits byte count gt lt binary point checksum The number of bytes in the byte count number This is an ASCII digit from 1 to 9 ASCH digits from 0 to 9 repre senting the total number of data bytes plus checksum number of digits gt byte count gt Same as the lt binary point gt defined in lt binary block data gt above binary point gt Same as the lt checksum gt defined in lt binary block data gt above lt checksum gt 10 BIT WAVEFORM DATA LSB MSB LSB MSE HIGH BYTE LOW BYTE X Fig 5 1 Transfer of 10 bit waveform data 5 25 Programming Command Set The CURVe command transmits the waveform point CURVE lt binary block data gt data of the source waveform specified by the DATa com lt binary block data gt or mand from the RTD 710A to the GPIB controller in the CURVE arbitrary block data format shown to the right and illustrated below which is defined in Fig 5 2 and Fig 5 3 respectively CURVE bbhlhi eBbhlhtl hIC CR LF
150. ideo and its lines are num bered 1 through 263 starting with the leading edge of the first equalizing pulse The first regular horizontal sync pulse after the second equalizing interval is the start of line 10 Field 2 starts with an equalizing pulse a half line interval from the preceding horizontal sync pulse The Field 2 picture starts with a half line of video and its lines are numbered 1 through 262 starting with the leading edge of the second equalizing pulse After the second equalizing interval the first fuil line is line 9 CCIR SYSTEM B AND SIMILAR 625 50 SYSTEM Except for PAL systems identification of parts of the picture in most 625 line 50 Hz field rate systems relies primarily on continuous line numbering rather than on field and line identification RTD 710A instruction Manuai Options The CCIR frame starts with the first wide vertical sync pulse following a field which ends with a half line video The first line after the second equalizing interval is line 6 the first picture line is line 23 half line of video The first field of the frame contains lines 1 through the first half of line 313 and the picture ends with a full line of video line 310 The second field of the frame commences with the lead ing edge of the first wide vertical sync pulse middle of line 313 and runs through line 625 end of equalizing interval The first full line after the equalizing interval is line 318 the pictur
151. igger pis play The time sequence for arming is as follows The ARM DELAY range is 0 10 seconds in a 1 2 5 se quence If it is set to zero 0 the actual trigger hoidoff time depends upon display update time acquisition system reset time and pretrigger acquisition time When EXT arm is se lected the ARM DELAY is automatically set to zero 0 When an acquisition is stopped by the HOLD key or HOLD ON command over the GPIB before the ARM d con dition occurs the last acquired data in the record location is all valid because a new acquisition can t start unti ARM d occurs l ARM is a control signal that allows triggering of the RTD 710A or the start of a TRIG DELAY after some predeter mined period set by ARM DELAY The actual writing of data to memory cannot begin until after the ARM DELAY period The timing for actual waveform acquisition is determined by the TRIG DELAY period The acquisition status indicator ARM D lamp illuminates when the ARM signal occurs and goes out when acquisition starts 1 2 3 4 5 6 7 l 8 OM S I L1 Y COMPARISON REFERENCE DATA Must be located in the last record 6397 33 7 204 5 Fig 3 20 COMP IN trigger mode repesentation 3 28 RTD 710A Instruction Manuai SAMPLE POINTS O REFERENCE MAXIMUM VALUE X REFERENCE MINIMUM VALUE Z ACQUIRED DATA A COMPARISON IS MADE TO CHECK WHETHER ACQUIRED DATA FALLS WITHIN THE Fig 3 21 Method of data comparison INTERNAL AR
152. igger source is CH1 but since it is un known whether the leading edge of the transient signal is going to be positive going or negative going set the Trigger SLOPE to BI using the SLOPE toggle key 8 To ensure that the trigger does not misoperate on Bi siope use TRIG LEVEL 1 and 2 for setting the trigger level window Press the TRIG LEVEL 1 key and while its indicator is blinking use the Parameter Entry Knob to set the TRIG LEVEL 1 value to 59e Press the TRIG LEVEL 2 key and while its indicator is blinking also set it to 5 9 To acquire the simulated transient waveform set the trigger MODE to SGL using the MODE toggle key 10 To start the acquisition press the RESET HOLD key When the ARM D indicator starts blinking it indicates that the RTD 710A is waiting for a trigger to start the acquisition 11 Turn on the sine wave generator As soon as the signal meets the TRIG LEVEL 1 or 2 requirement the TRIG D indicator turns on indicating that the waveform is being acquired As soon as the waveform is acquired the HOLD status is set and the waveform is displayed Fig 3 48 12 Channel 2 aiso may be displayed on the CRT moni tor even though no waveform data is being input This dis play can be removed by pressing the DISPLAY LOCATION key twice to select the CH2 DISPLAY then turning the Pa rameter Entry Knob until a display location of zero 0 is displayed Waveform Acquisition with a Breakpoint This example
153. intended to provide good horizontal resolu tion and a scroll function while compression provides a means to see the entire waveform quickly The amount of zooming is expressed as a ratio with a maximum rate of expansion of 16 and a minimum rate of compression based on the record length setting The avail able zoom settings and memory windows are shown in Ta ble 3 11 3 44 Table 3 11 HORIZONTAL ZOOMING RATES Record Length zooming Rate Memory Window 1K 2 16 1K 128K 2K 1 16 2K 128K 4K 5 16 4K 128K BK 1 4 16 8K 128K 16K 1 8 16 16K 128K 32K 1 16 18 32K 128K 64K 0 1 32 16 64K 128K 128K 1 64 16 128K 1 128 16 l 128K CURSOR is always the center point for horizontal zooming If CURSOR is not displayed the RTD 710A keeps the previously set CURSOR position and uses it as the center reference point Fig 3 39 shows an example of a normal waveform and Fig 3 40 shows the same waveform with horizontal zoom expansion NOTE If the waveform is compressed timing accuracy is re duced by a factor of the compression ratio CURSOR AT CENTER OF DISPLAY 6397 51 Fig 3 39 Normal waveform display RTD 710A Instruction Manual CURSOR AT CENTER OF DISPLAY Fig 3 40 Horizontal zoom display DOT LINE DISPLAY MODE When a horizontal zooming ratio of two 2 or greater is used DOT LINE switching in the interpolative mode can be useful This function is ac
154. ion by sliding the instrument in and out of the rack 5 if necessary repeat steps 2 through 4 for the rear vertical rails of the rack RTD 710A Instruction Manual twi tay zwee zt X 4 Le Rake LV dam op renee ide Gua o ne 8 gh see eq i T egt mt t peu tA Lag D dk E Ta a at ji epai n GA AN E S ws ATi A ay E E E Wd ze at NIS fH as st wt 7 n f oc oo Y EN EC sh x 3 LS 1 x ae aE 3 f ET nse E r i s p PE Vut M ie i n Eo Nie ftc us a ht Lot amp e i y c os e x Anc 0 EI riw is f rTP e t j AANT t T Wend te dj mu mw Vi RR REUS d ie PE PEE MANUAL CHANGE INFOR MATION Se ee PR n x r Worm Mrs eee A De fe CSS ue QE eer Rr a EH RENT st hp ss At Tektronix we continually strive to keep up with latest electronic developments oe by adding circuit and component improvements to our instruments as soon as they are developed nd tested Sometimes due t printing and shipping requirements we Gan t g tthese changes inimediately into printed manuals Hence your manual may contain new wow d change information on following pages A single change may affect several sections Since the change information sheets are carried in the manual until all changes are permanently entered some duplication may occur If no s ch change pages appear D this page i our manual is correct as printed Sp OPEN i urone y Ma C
155. iowing setup topics procedures 1 RTD 710A internal Selection Strap Settings The X Level Y Level Z Level Z Polarity and HAIR Cursor Type Line or Dot for an external monitor are set by jumpers inside the RTD 710A The Level jumpers can select either a 1 V or 5V output These are set to 1V at the factory The Polarity jumper can set either Positive or Negative it is set Positive at the factory The HAIR jumper makes the dis played cursor a line or a dot It is set for a Line at the fac tory The factory settings for the internal jumpers are set correctly for a Tektronix 620 monitor If the factory settings are not correct for the monitor being used refer the changes to qualified service personnel 2 Monitor Connections Connect BNC coaxial cables between the RTD 710A X Y and Z output connectors and their associated connectors on the CRT monitor It is rec ommended that standard one 1 meter coaxial cables be used as longer cables may cause waveform degradation 3 Power Application and Test Pattern After turning on the RTD 710A Principal Power Switch on the rear panel and the ON STANDBY switch on the front panel turn on the monitor When the RTD 710A enters normal operation ver ify Hold is enabled indicator on then push the MON CAL key to display the pattern shown in Fig 3 1 The MON CAL key indicator is on when the pattern is on 3 4 Fig 3 1 MON CAL test pattern 4 CRT Monitor intensity Set the mo
156. is issued if EXW is on When queried the value is NR1 lt NRx gt Sets the number of times to average lt NRx gt 2 to 16348 in 2 steps If lt NRx gt exceeds the range it is truncated and limited to a legal number and a warning SRQ is issued if EXW is on When queried the value is NR1 lt NRx gt Sets the waveform memory location number as the acquisi tion segment NRx 21 to 256 VMOde CH1 NRx 71 to 128 VMOde DUAI if RECOrd MODe ENV and ENVelope is equal to or more than 2 NRx 21 to 255 VMOde CH1 lt NRx gt 1 to 127 VMOde DUA If lt NRx gt exceeds the range it is truncated or limited to match a legal value and a warning SRQ is issued if EXW is on When queried the value is NR1 Queries the selected RECOrd settings ENVelope vaiue is in NR1 format AVErage value is in NR1 format LOCation value is in NR1 format _ Queries for all RECOrd settings Example response RECORD MODE NORM AVERAGE 2 ENVELOPE 1 LOCATION 1 RTD 710A Instruction Manual Programming Command Set Table 5 3 Cont TIME BASE AND RECORDING GROUP Link Argument Description Sets the acquisition record length NRx 1024 2048 4096 8192 16384 32768 65536 131072 or 262144 262144 is for VMOde CH1 and SAMple MODe HiSpd only NRx is truncated or limited to the nearest legal setting and a warning SRQ is issued if EXW is on Record Length value affects the trigger delay value a
157. is pushed its selection or value is initialized RTD 710A instruction Manual if the INIT key is pushed twice all controls are initialized The selections and values to which they initialized are con tained in Table 3 1 under the INITIALIZATION topic in the Initial instrument Setup subsection at the beginning of this section MAKING COPIES WITHOUT A CONTROLLER By connecting an HPGL plotter through the GPIB with the RTD 710A the waveform data presently being displayed on the CRT monitor can be copied Use the following proce Gure to output waveform data to a plotter 1 Select the waveform data that is to be plotted using the DISPLAY LOCATION key and set the instrument to hold status l 2 Switch the GPIB address switch TON to 1 to set the instrument TALK ONLY mode 3 Connect the instrument with the plotter through the GPIB cable The instrument and the plotter should be the only items connected to the GPIB 4 Set the plotter to the LISTEN ONLY mode and confirm itis READY 5 Press the front panel PLOT key The PLOT key indicator should light and output to the piot ter should begin When output is completed the light extinguishes l i When PLOT is pressed during an acquisition execution out put begins after the current acquisition is finished When PLOT is pressed during output the output stops and the key indicator goes off if PLOT is pressed again the data is output from the beginning once more All other co
158. ite Sync 110 of full scale min External Trigger Input Composite Video 500 mV min Composite Sync 250 mV min RTD 710A Instruction Manual B 11 ASCII amp GPIB CODE CHART B7 g g 1 1 1 B6 g g g g 1 BS g 1 g 1 g 1 BITS NUMBERS CONTROL SYMBOLS UPPER CASE LOWER CASE B4 B3 B2 B1 0 20 40 0160 16 100 GE t20 168 140 16 s 8 e s NUL DLE SP 0 P o 0 10 16 8 20 32 30 483 40 54 i SO 8083 60 96 142 1 GTL 21 LLOJ 41 1 681 173 10 1i t21 173 741 17 g g g 1 SOH A Q a 1 1 49 E 41 65 51 Bt 61 87 113 2 18 102 2 122 IBE 142 18 s a g STX B R b 2 2 508342 66i 52 82 62 98 114 3 19 103 3i 123 198 143 19 8831 1 ETX DCS 3 C S c 3 34 3 199 23 35 133 51 43 87 53 839 63 99 115 4 SDC 24 DCL 44 4164 20 104 4 124 204 144 20 g159 g EO DCA 4 D T d 4 4 t4 20124 36 i34 52844 68 54 849 64 100 116 5 PPC i 25 PPul 45 5165 213 105 5 125 248 145 21 amp K 1 8g 1 EN NAK 96 5 E U 6 5 5115 21925 37 435 55 101 117 6166 146 22 amp 11 e ACK 6 f 38 136 66 162 118 7167 147 23 8111 NE G Ww g 39 137 55 47 711 57 87 67 103 118 8170 2434 110 8i 130 248 150 24 18599 8 H X h 40 38 56 3 48 72158 88 j 68 104 126 11 TCT 31 SPD 51 9171 254111 9i 134 258151 25 1588 1 HT EM 9 I Y i 9 9119 25 E28 41 139 57 f 49 73 59 83 8 69 105 121 12 32 52 40 172 264 72 101 132 26 152 26 161 LF SUB t J Z j 10 1A 26 52A 42 i3A 58 F 4A 7434 5A 90 6A 106 122 13
159. ized at an adequately high sample frequency the waveform is reproduced on the CRT monitor as shown in Fig 3 27b However if the sample frequency is decreased slower sample interval or the analog input sig nal frequency is increased until the sample frequency is less A ANALOG INPUT SIGNAL than the maximum input signal frequency as shown in Fig 3 27c the waveform is recorded as shown by the dotted line in Fig 3 27c The signal is called an aliased signal and dif fers from the input signal A ANALOG INPUT SIGNAL B WITH FEW SAMPLING POINTS THE AREA OF THE NOISE SPIKE IS MISSED B USING ADEQUATELY HIGH SAMPLING FREQUENCY SAMPLING ALIASING INPUT POINTS SIGNAL SIGNAL DOTS aad C ALIASING PRODUCED BECAUSE OF TOO LOW SAMPLING FREQUENCY 6397 40 C INCREASED SAMPLING POINTS SHOW THE NOISE SPIKE Fig 3 27 Display of aliasing Fig 3 26 Examples of sampling rates for noise spikes 3 32 ij RTD 710A Instruction Manual In order to avoid aliasing it is necessary to select a sam ple frequency at least twice as high as the highest frequency component of the input signal If the input signal is un known increase the sample frequency until a stable trig gered display is obtained NOTE Envelope mode can be used to verify the signal is not aliased If the signal is aliased the envelope display will paint two horizontal lines representing the maxi mum and minimum levels If th
160. key is pressed again while its LED is blink ing the display changes to the TIME display The internal calculations and display procedures are the same as for the SET key BREAK POINT CLR Pressing this key clears the currently displayed break point A break point is cleared by pressing the BREAK POINT DISPLAY key to display break points then using the Parameter Entry Knob to se lect the breakpoint to be cleared then pressing the BREAK POINT CLR key If all breakpoints are to be cleared push the BREAK POINT DISPLAY key then select the highest address breakpoint with the Parameter Entry Knob then keep pushing the CLR key until the display reads zero 0 RECORD MODE A toggle key that selects the acquisition mode There are four record modes NORM normal AVE averaging ADV auto advance and ENV enve lope The backlighted indicator above the key shows the selected mode NORM Waveform data is acquired into the memory location set when the record location key is selected AVE The digitized waveform data is continuously averaged The number of times that can be set for averaging by rotating the Parameter Entry Knob is from 2 to 16384 in steps of 2 NOTE Averaging is limited to an BK record length ADV Acquisition of waveform data begins with record location 1 and advances continuously up to the record location set by the RECORD LOCATION key In this mode the record location in acquisition is displ
161. ldering or replacing components RTD 710A instruction Manual Do Not Wear Jewelry Remove jewelry prior to servicing Rings necklaces and other metallic objects could come into contact with danger ous voltages and currents Power Source This product is intended to operate from a power module that will not apply more than 250 volts rms between the supply conductors or between either supply conductor and ground A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation Section 1 GENERAL INFORMATION DESCRIPTION The Sony Tektronix RTD 710A Digitizer is a microprocessor based fully programmabile true dual chan nel digitizing instrument It provides 10 bit resolution at a 200 MHz maximum sampling rate high speed sample mode or at a 100 MHz maximum sampling rate normal sample mode Vertical signal inputs are through front panel BNC con nectors and 100 MHz bandwidth input amplifiers Input range scaling is provided in a 1 1 25 1 6 2 2 5 3 2 4 5 6 2 8 10 sequence which provides much finer input scaling than does the customary 1 2 5 scaling An auto calibration fea ture provides compensation for zero volt gain and phase error in the input amplifiers and A D converters The time base can be clocked internally by a crystal con trolled oscillator or externally through a rear pane BNC connector The sampling interval using the i
162. le range when Break Point function includes a 10 ns Sample Interval and an Auto Cal is performed 1 096 or less of full scale range when Break Point function includes a 5 ns Sample Interval and Auto Cal is performed B 2 RTD 710A Instruction Manual Specifications Tabie B 2 cont Characteristic Performance Requirement Supplemental Information DC input Offset Voltage Range 0 to 199 of input range Selectable in 1 steps May be entered in of Input Range or in absolute Volts that is equivalent to caiculated as follows V value Input Range value is rounded to 3 digits Accuracy 0 100 t 196 or less of full scale range 101 150 Add 1 to 1 100 value 4151 199 Add 1 to 101 150 value input R and C Resistance Mohm 2 Capacitance Approx 24 pF 250 V Dc peak ac maximum ac component of 500 V p p at 1 KHz or less Maximum input Voltage DC AC or GND coupled A D CONVERTER Maximum Sampling Frequency CH 1 Only Mode 200 MHz DUAL Mode 100 MHz Dynamic Accuracy Measured at 25 C x 5 C by using post trigger l data Normal Sampling Mode See Table B 2 1 and Table B 2 2 Measured at 10 ns sampling interval Table B 2 1 NORMAL SAMPLING MODE DYNAMIC ACCURACY Input Frequency Effective Bits Typical 1 MHz 20 MHz BW limited gt 7 8 bits gt 8 2 bits 10 MHz 20 MHz BW limited gt 7 6 bits gt 8 0 bits 50
163. lled by several internal jumpers mainly the X Level Y Level Z Level Z Polarity and Hair The Hair jumper selects the type of cursor vertical line or dot displayed on the monitor Table D 1 shows the selections available Table D 1 CRT MONITOR JUMPER SELECTIONS Jumper Output Name J Number Selection Jumpered Pins X Level J470 5V 1 2 1V 2 3 Factory Setting Y Levei J430 5V 1 2 1V 2 3 Factory Setting J481 5V 12 iV 2 3 Factory Setting Z Polarity J480 Positive 1 2 Factory Setting Unblk 2 3 Hair J400 Line 1 2 Factory Setting Dot 2 3 Hazardous voltages exist inside this instrument when the power cord is connected to a power source To avoid injury disconnect the power cord before remov ing any instrument covers 2 Level To change any of the CRT monitor jumper selections 1 Remove the top cabinet cover D 6 2 Remove the six 6 Main Chassis Cover attaching screws Fig D 5 There are two 2 screws at the front edge three 3 at the rear edge and one 1 at the top right center part of the cover MAIN CHASSIS COVER CIRCUIT BOARD RETAINER ATTACHING FRONT TAB CIRCUIT BOARD RETAINER Located Under Main Chassis Cover Fig D 5 Main chassis cover and circuit board retainer 3 Remove the Main Chassis Cover by sliding it slightly toward the front of the instrument to unhook its Front Tab Then lift the cover up and out of the chassis 4 Unscrew the three 3 Ci
164. lled over the waveform with the Parameter Entry Knob Whichever cursor indicator is blinking is the one that can be moved The cursor can be moved only over the acquired waveform point it can t move over interpolated data When CURSOR 1 is moved to the far right or left end of a waveform on the CRT monitor attempts to move it further causes the display to scroll This scrolling function is pro vided only by CURSOR 1 CURSOR 2 can be moved only within the displayed waveform NOTE The RTD 710A must be in the HOLD state to scroll There are two cursor scrolling modes selected with the SCROLL MODE key ALL and IND ependent in the ALL mode the time position of both waveforms remains the same and both cursors are scrolled simultaneously on the waveforms when the Parameter Entry Knob is rotated in the IND mode the waveforms are independently scrolled by selection of the CURSOR 1 key RTD 710A Instruction Manual Operating Instructions Cursor Measurement When a cursor is displayed on the waveform the MEA SURE key functions can be selected to measure waveform parameters such as voltage differences time and fre quency Table 3 10 describes the types of measurements that can be made using the cursor Tabie 3 10 CURSOR MEASUREMENTS WITH THE MEASURE FUNCTION Displayed Measurement Measurement Item Cursor Key CURSOR 1 V Voltage reference to ground or at cursor position CURSOR 2 T j Time measurement from t
165. lows V value 5 V rounded to 3 digits means pre trigger delay means post trigger delay instrument acquires 1 full record of pre trigger data at the sampling rate of the first breakpoint before becoming triggerable when in minus trigger delay range pre trigger mode Selectabie in in integer multipies of 8 Selectable in integer multiples of 16 Selectable in a 1 2 5 sequence Actual arm delay time between the end of acquisition and the time a trigger initiates the next acquisition is affected by instrument control settings External Arm function is similar to a trigger qualifier function Specifications Table B 2 cont Characteristic Performance Requirement Supplemental information TIME BASE internal Clock Frequency 200 MHz 0 001 loc to 50 C ambient checked at 25 C External Clock Frequency Range Normai Sampling Mode 100 MHz max High speed Sampling Mode input Signal Level ECL Input Impedance 50 ohm is connected to 2 volts Rise and Fall Time Pulse Width Normal Sampling Mode At least 5 0 ns Positive pulse High Speed Sampling At least 25 ns Positive pulse Mode Sampling interval Internal Clock Normal Sampling Mode Selectable from 10 ns to 200 ms in a P 1 2 3 4 5 6 7 8 9 sequence High speed Sampling Mode Selectable from 5 ns to 200 ms in a 1 2 3 4 5 6 7 8 9 sequence External Ciock Normal and High speed Selectable multiplier valu
166. mai Sampling Mode 16 to record length 8 Selectable in integer multiples of 8 High speed Sampling Mode 32 to record length 16 Selectable in integer multiples of 16 Averaging Number of Times Selectable from 2 to 16384 ina Uncorrelated noise signal to noise ratio is improved 2 4 8 binary sequence by the square root of the number of waveforms i averaged Average Memory Depth 8192 words per channel Envelope Number of Times Selectable t 2 to 16384 in a When 99999 is selected an infinite of Times of 2 4 8 binary sequence Enveloping is performed With 2 or more of Times the last memory segment is used for envelope accumulation CURSOR MEASUREMENT Calculated value is rounded to 8 digits and displayed in the Control display Cursor Measurement Accuracy Vertical Voltage Calculation accuracy is 0 05 of full scale Neastienent Total accuracy is influenced by input range accuracy input offset accuracy low frequency linearity frequency bandwidth and effective bits Horizontal Time 0 001 The calculated value is rounded to 8 digits Mgasuremeny lin the envelope mode the actual time measurement resolution is limited to 2 sample interval rounded to 8 digits 0 001 BEEN RTT ee nnana aaa NON VOLATILE MEMORY Memory Size Up to 20 front panel settings can be retained Front Panel Data Retention Time gt 5 years Backup memory power is lithium battery RTD 710A
167. mal mode sequence In this case the sample interval is displayed in engineering nota tion in the form xEy and indicates that the time base clock is the external clock whose interval is multiplied by x times 10 to the y power NOTE When using the internal clock and the sam pling interval is larger than 200 us the instru ment is in the ROLL display mode For more information refer to the Instrument Familiariza tion subsection CLK SOURCE A push to select key with LED that sets the time base clock source to either INT internal clock the default value or to EXT external clock When set to EXT LED on the Time Base display changes Operating Instructions from display of time to the xEy form display and if the TRIG DELAY or BREAK POINT values are dis played in time each display changes to the sampie point number display When set to EXT an external clock signal applied to the EXT CLOCK IN connec tor located on the rear pane is used for the sampling clock The maximum frequency for the external clock signal is 200 MHz Selectable sample intervals depend on the sampie mode 100 MHz maximum 10 ns or 2EO minimum in NORM and 200 MHz maximum 5 ns or 1E0 minimum in HI SPD SAMPLE MODE A push to select key with LED that sets the sample mode to either NORM normal sample mode the default mode or Hi SPD high speed sample mode When the normal sample mode is selected the mini mum sampling interval is 10 ns
168. mand to store front panel settings 400 Send RECALL command to restore settings 410 End of program Displayed Cursor Position Subprogram Following is a 4041 only subprogram to read the posi tion of the displayed cursor s and return the value s 2900 Sub readcur rtd cha var start stoppt 2910 2920 Subprogram to read the position of the displayed cursor s 2930 and return the value s for use by the waveform location and delta time 2940 determination subprograms 2950 2980 Cha str cha 2970 Print rtd CURSOR ONE DISP amp chaf amp CURSOR TWO DISP amp cha 2980 Input rtd prompt CURS POS1 CURS POS2 cursor 2990 start ee pos poupata POSE 1 4 3000 Stoppt valc cursor pos cursor P052 1 44 3010 Return 3020 End 5 33 Programming Command Set Program explanation 2900 Start of subprogram identifies variables to receive send data from to calling program 2960 Converts numeric value of cha to a string equivalent 2970 Setup cursor displays for selected Channel cha 2980 Query for cursor position 2990 Make Start position of CURSOR 1 3000 Make Stoppt position for CURSOR 2 3010 Return to main program 3020 End of program Initiating a HP GL Plot From The Controller The following is a sample program for making a copy using an HP GL plotter 100 110 f A copy from RTD 710A to a HP GL plotter 120 that s connected the GPIB 130 RTD 71
169. mmand The preamble and curve information may be transmitted together from the RTD 710A to the controller using the WAVfrm command When the command WAVtrm is sent the RTD 710A responds preamble gt curve data where lt preamble gt response to WFMpre curve response to CURVe DATa Command To transfer waveforms from the RTD 710A the waveform data source needs to be identified using the DATA com mand and its arguments CHANNEL LOCATION START COUNT BFORMAT and BSIZE DATa CHAnnel CH1 or CH2 selects which channels data is to be transferred DATa LOCation defines which record 1 256 is to be transferred DATa STArt specifies the starting address of the selected data Use WFMpre PT OFF to designate the starting point if the first point in the selected data is desired DATa COUnt specifies the number of waveform data points to be transmitted Use WFMpre COUnt if the entire record is being transferred DATa BFOrmat specifies the format of the waveform data that is transferred by the CURVe or CURVe commands either Binary or Arbitrary DATa BSize specifies the binary block size of each trans fer when data transfer of binary block data format BFOrmat BiNary is taken It is useful to control the size of the data Block Size If a 64K waveform is to be tranferred BSIZE will limit the Block Size to 16K each The waveform can then be read into four 16K arrays HEPeat Command For transmi
170. mple points When using pre trigger capture it is not possible to set a breakpoint for sampie points before the trigger point Aiso when using post trigger delay even if a breakpoint is set for a sample point which is be tween the trigger point and the post trigger delay it will not be displayed on the CRT monitor but the 3 14 sample interval can be switched When the SET key is pressed again while it is blink ing the breakpoint indication on the Recording dis play changes to the TIME dispiay based on the trigger point In this case the number of sampie points for the breakpoint is multiplied by the sample interval and the six most significant digits can be displayed Setting the breakpoints in this manner al lows a single record to be divided into blocks with different sample intervals A maximum of five break points can be set for a single record CURSOR 1 can be used to quickly measure the locations of de sired breakpoints BREAK POINT DISPLAY A push to select key with LED that displays the cur rently set breakpoints on the Recording display When this key is pressed 0 is displayed when no break points are set the break point closest to the current BREAK POINT SET key setting is displayed when the breakpoints are set When the Parameter Entry Knob is rotated the set break points are dis played in turn also the sample intervals of each breakpoint are displayed on the time base display When the
171. n the input signal contains a large amount of noise that may vary around the trigger level causing false triggering The basics of a hysteresis trigger are that once a triggering level is crossed and the trigger occurs the trigger is not reset until the waveform crosses another preset level that noise is unlikely to reach With 4 hysteresis the trigger point is set on the positive going portion of the signa with trigger level 1 while the hysteresis point trigger reset is set on the negative going portion of the waveform with trigger level 2 Figs 3 16 and 3 17 TRIGGER POINT TRIGGER POINT i TRIGGER LEVEL 1 TRIGGER LEVEL 2 TRIGGER RESET Fig 3 16 Hysteresis Level 1 gt Level 2 3 26 TRIGGER RESET TRIGGER POINT TRIGGER LEVEL 1 Fig 3 17 Hysteresis Level 2 Level 1 With hysteresis the trigger point is set on the negative going portion of the signal with trigger level 2 while the hysteresis point trigger reset is set on the positive going portion of the waveform with trigger level 1 Figs 3 18 and 3 19 TRIGGER RESET TRIGGER RESET TRIGGER LEVEL 1 TRIGGER LEVEL 2 TRIGGER POINT Fig 3 18 Hysteresis Level 1 gt Level 2 TRIGGER POINT TRIGGER LEVEL 2 TRIGGER LEVEL 1 TRIGGER RESET TRIGGER RESET 6397 32 Fig 3 19 Hysteresis Level 2 gt Level 1 RTD 710A Instruction Manual NOTE in the HYS or HYS mode the trigger ge
172. nd record jocation number If limitation occurs because of a record length value change the values are limited to the nearest legal value and a warning SRQ is issued if EXW is on Record Length value also affects the Cursor position value Horiz Zoom value and Display Location number These values are also limited to the nearest legal value or number When queried the value is NH1 Queries for the record acquisition length Response is in NR1 format Example response LENGTH 2048 Controls the acquisition recording start and stop for time base ON immediately stops an acquisition operation Some data may be invalid NEXt allows the current acquisition operation to continue through its specified record length then enter the hold state RESet clears the hold state and initiates the start of a new acquisition Reports the acquisition status for both time base channels de Example response HOLD RESET Header Argument LENgth NRx LENgth HOLd ON NEXt RESet HOLd BREakpoint CLEar UNI SET 5 6 NRx POint TiMe NRx NRx Clears the specified breakpoint NRx 7 1 5 If requested number is illegal and EXR is on an error SRQ is issued Selects the units of measure for the breakpoint settings H SAMple CLOck EXT is selected only POlInt is available Sets up to 5 breakpoints First NRx in the argument assigns the break point location Break point location limit is 10 to 52427
173. nector A BNC connector that provides a TTL compatible true high signal when the instrument has been triggered Fig 3 9 RTD 710A rear panel RTD 710A instruction Manual D fected the CLK OUT Connector A BNC connector that provides an ECL level inter nal sample clock output Clock output mode is inter nally selectable for DIRECT or DIVIDED It is set to DIVIDED at the factory To change setting refer to qualified service personnel EXT ARM IN Connector A BNC connector that accepts an external arming signal when the arm mode is set to external The arming is actuated by the edge or level of a positive going TTL compatibie signal An interna Edge or Leve selection jumper is pro vided on the Time Base board When Edge is se trigger circuit is armed by the positive going edge of the externally applied arm signal after the instrument has entered the arm wait cycle When Level is selected normal acquisition oc curs while the external arm signal is true logica 1 If the arm signal is false logical 0 the trigger re mains in the wait state thus it may be used as a trigger hold off signal EXT CLK IN Connector A BNC connector used for connecting an ECL com patible external clock signal to drive the time base RTD 710A instruction Manual Operating instructions when an external clock source is selected input im pedance is approximately 50 0 terminated to 2 V Fuse Holder Cont
174. nerator waits for the trigger to reset before it becomes triggerable Trigger sensitivity is adjusted by varying the difference between the trigger level 1 and 2 values To select HYS slope and set the trigger levels 1 Select HYS slope using the TRIG SLOPE toggle key HYS is first selected If the lever switch is toggled again HYS is selected 2 Push the TRIG LEVEL 1 key Its current value will be displayed in the Trigger display If the key indicator is blink ing use the Parameter Entry Knob to set trigger level 1 to the positive going trigger level for HYS or to the positive going reset level for HYS 3 Push the TRIG LEVEL 2 key its current value will be displayed in the Trigger display If the key indicator is blink ing use the Parameter Entry Knob to set trigger level 2 to the negative going reset level for HYS or to the negative going trigger level for HYS NOTE The trigger level can be set in either e of full scale or voltage With an internal trigger the of full scale or voltage value is set in 1 of Input Range steps With external trigger the trigger level is set in or a volt age value in 1 of full scale for External Trigger in 5 V Trigger Mode The RTD 710A features five Trigger Modes AUTO NORM al SGL Single COMP are IN and COMP are OUT AUTO NORM and SGL operate basically the same as in conventional oscilloscopes but COMP is a special fea ture of the RTD 710A
175. neta sme une ns TO REMOVE 1 Pull out the rackmount latch releases and pull instrument Out of the rack untii the TUE first set of aGiGmati fatGhes t 657 o 600950000 2 lock ROO ER AS Oo RERO 2 Push in the automatic lateh i c vu buttons shown and pull the US instrument out and away from the rack slides gom Fig D 14 Installing removing the instrument from the rack RTD 710A instruction Manual D145 Servicing instructions 2 Slide the instrument Chassis Sections into the inter mediate Sections until they lock together with the Automatic Latches Carefully attempt to pull the instrument out of the rack it should not move If it does the rack sections are not properly installed Recheck the installation 3 Press in both Automatic Latch buttons in the Interme diate Sections while pushing the instrument into the rack As soon as the buttons are past the Automatic Latch Holes the instrument can be pushed completely into the rack The Automatic Latches locking the intermediate Sections to the Stationary Sections are automatically operated by the in strument as it is pushed into the rack if the Rackmount Latch Releases are pushed completely into the instrument they automatically engage the Rack Latch Holes in the Sta tionary Sections when the instrument is pushed completely into the rack 4 Install the two security screws in the top of the Rackmount Handies if desired
176. ng for the sample interval The internal clock can be selected for sampling intervals up to 200 ms 5 Hz An external clock can be selected requires an ECL clock signal input through the EXT CLK IN connector on the rear panel whenever A slower sampling interval than 200 ms is desired A desired sampling interval isn t available from the internal clock tis necessary to sample with a clock that is in sync with the input signal The maximum frequency and minimum pulse width for a external clock signal is contained in Appendix B SPECI FICATIONS Always stay within the specifications since an externai clock signal that exceeds these specifications may prevent normal sampling and cause misoperation When us ing an external clock time displays such as trigger delay breakpoint and time and frequency cursor measurements cannot be made RESET HOLD Function For the discussion of the RESET HOLD function refer to Fig 3 30 RTD 710A Instruction Manual HOLD REQUEST GENERATED RTD 710A Instruction Manual WAVEFORM ACQUISITION START ARM 3 INPUT WAIT ARM D ACQUIRE PRE TRIGGER DATA ARM D INDICATOR ILLUMINATED ACQUIRE PRE TRIGGER DATA TRIGGER INPUT WAIT TRIGGER INPUT TRIG D DATA ACQ ACQUISITION ENDED DATA POST PROCESSING DATA DISPLAY HOLD STATUS RESET STATUS Fig 3 30 RESET HOLD function and data acquisition Operating instructions RESET REQUEST
177. ng executed Specifically used to stop a looping test 5 17 Programming Command Set Header ID SET HELp SAVe RECall DEVice 5 18 Table 5 10 UTILITY COMMAND GROUP Argument Link Argument lt NRx gt lt NRx gt SETtings ON OFF GRAt ON a OFF WAVirm ON OFF Description Queries for the RTD 710A ID message which is returned as ID SONY TEK RTD710A V81 1 F rom patch rom 1 character ROM version patch 2 character patch version Example response ID SONY TEK RTD710A V81 1 F1 00 Reports the current instrument control settings which are returned in an ASCII string that can be sent to the RTD 710A for setup Example response CH1 RANGE 2 5E O UNIT PERCENT OFFSET 0 COUPLING AC CH2 RANGE 50 0E 0 UNIT PERCENT OFFSET 0 COUPLING AC VMODE DUAL BWLIM OFF ARM MODE INT DELAY 0 0E 0 SAMPLE MODE NORM CLOCK INT INTERVAL 10 0E S RECORD MODE NORM AVERAGE 2 ENVELOPE 1 LOCATION 1 BREAKPOINT UNIT POINT SET 0 10 0E 9 SET 520 100 0E S LENGTH 2048 TRIGGER MODE AUTO DUNIT POINT DELAY 400 COUPLING DC SOURCE CH1 SLOPE POSITIVE LUNIT PERCENT LEV1 0 LEV2 0 LONSTART PREFLD DISPLAY CHANNEL CH1 LOCATION 1 MODE YT INTERPOL LINE SHZOOM X1 VZOOM X1 VPOSN 0 PORSO ONE OFF TWO OFF SCROLL ALIGN Response is a list of alf valid command headers available to the user Example response HELP ARM AUTOCAL BASE BREAKPOINT BWLIM CER CH1 CH2 CURSOR CURVE DATA DEVICE DISPLAY DT ERROR EVENT EXR EX
178. nitor intensity to a comfortable viewing level where the the retrace cannot be seen 5 Horizontal Position and Gain Controls of CRT Moni tor Adjust the monitor X position for a horizontally centered pattern The full scale pattern width should be 10 divisions If it isn t and the monitor has an external horizontal gain control the 620 doesn t adjust it for the correct width H the 620 monitor is used its external graticule must be in place for checking these adjustments 6 Vertical Position and Gain Controls of CRT Monitor Adjust the monitors Y position for a vertically centered pat tern The full scaie pattern height should be 8 divisions If it isn t and the monitor has an external vertical gain contro the 620 doesn t adjust it for the correct height If the 620 monitor is used its external graticule must be in place for checking these adjustments l 7 Test Pattern Removal Push the MON CAL key to turn off the calibration pattern At this point the RTD 710A and monitor should be ready for operation RTD 710A Instruction Manual Operating Instructions CONTROLS CONNECTORS AND INDICATORS The following descriptions are provided to familiarize the operator with the location and function of the controls con nectors and indicators of the RTD 710A Digitizer More de tailed information on the use of the controls is provided in the Instrument Familiarization subsection FRONT PANEL The RTD 710A front pan
179. nt is turned on 2 The front pane GPIB SRQ indicator blinks if a self test error occurs 3 The ERRor query must be used to obtain the error code 4 The TEST OFF command can be used to exit to at tempt normai operation Power Off To turn the instrument completely off turn the front panel ON STANDBY SWITCH to STANDBY and the rear panel Principal Power Switch to OFF When the power is turned off in a normal manner no processes are executing a power off process stores the current control settings and retains those that were previ ously saved However if power is turned off interrupted during self test or while performing Level 2 diagnostic tests or some waveform functions the instrument may not power up in normal operation when next turned on SELF TEST The 5 digit numbers displayed in the Trigger display dur ing the power up self test represent the self test module numbers being executed The meaning of each of these numbers is described in the Service Manual however the general features tested are 1 Lamp Test Checks all key lamps LED indicators and LED displays by lighting them The 7 segment LED display shows all 8s when tested This test is not performed on the Option 1 19 instrument 3 2 2 Key Switch Test Verifies that all key switch contacts are open in their unpressed state This test is not performed on the Option 19 instrument 3 ROM Checksum Tests the system ROMs 4 System RAM Read W
180. nt of POWER the instrument until the fuse holder power switch ground SUPPLY terminal and power cord recepticie clear the rear panel ATTACHING SCREWS POWER SUPPLY ONE ON REAR PANEL GROUND WIRE SCREW 6 Carefully lift the power supply up and out of the main chassis Replacement Install the power supply in the reverse order of removal NOTE Be sure to reconnect the ground wire at the top left corner of the power supply module If the power supply was removed to change its line voltage selector jumper be sure to change the Line Voltage Indicator INTERNALLY SET FOR screw on Fig D 3 Power supply removal the rear panel to reflect the correct line voltage se lected by the jumper Failure to make this change may cause an operator to connect the instrument to an incorrect line voltage which may damage the instrument D 4 RTD 710A Instruction Manual INTERNAL JUMPER SELECTORS LINE VOLTAGE SELECTOR Hazardous voltages exist inside this instrument when the power cord is connected to a power source To avoid injury disconnect the power cord before remov ing any instrument covers The RTD 710A will operate on 115 Vac or 230 Vac To change from one voltage to the other 1 Remove the top cabinet cover 2 Remove the power supply 3 Remove the six 6 attaching screws from the power supply side panel adjacent to the power cord recepticie power switch etc Fig D 4 4 Move the COM line voltage sele
181. nternal clock is selectable from 200 ms to 10 ns normal sample mode or 200 ms to 5 ns high speed sample mode The sampling interval using an external clock is DC to 10 ns normal sam ple mode or DC to 5 ns high speed sample mode The time base features a function that allows increasing or de creasing the sampling rate as many as five times during the same record sample Data memory is provided by 256K words 10 bits per word of local high speed RAM In the single channel mode all of the memory can be allocated to Channel 1 In the duai channel mode each channel is allocated 128K Memory can be partitioned into 1 2 4 8 16 32 64 128 or 256 single channel mode only records A non volatile memory is provided to store up to 20 sets of front panel settings These settings can be sequenced through and selected either manuaily from the front panel or under program control through the GPIB Triggering is provided in both a pretrigger and post trig ger mode using either internal or external trigger signals The triggering event can be selected by either time or point RTD 710A Instruction Manual count Pretriggering is selectable up to one full record length and post triggering can be delayed up to 262136 counts 262128 in high speed sample mode A cursor measurement function provides for waveform parameter measurements of voltage delta voltage time in terval and frequency Instrument functions can be
182. ntrols in cluding the parameter Entry Knob are disabled during output A controller can also initiate a copy and conditions for a copy can be set with the GPIB commands For these condi tions refer to Section 5 PROGRAMMING COMMAND SET REAR PANEL TRIG D OUT EXT ARM IN Connectors Serial Operation When the need arises to have multiple acquisitions where the total record length would exceed the 128K DUAL or 256K CH1 Only memory a number of RTD 710A units can be series connected using their TRIG D OUT EXT ARM IN connectors To setup multiple RTD 710A units Fig 3 45 RTD 710A Instruction Manual Operating Instructions EXT EXTERNAL TRIG IN TRIGGER SIGNAL ARM INT iip Aire TRIG MODE SGL RECORD MODE NORM TRIG D OUT SIGNAL BEING TESTED ARM EXT ul airs TRIGMODE SGL RECORD MODE NORM TRIG D OUT EXT ARM IN ARM EXT NE TRIGMODE SGL RECORD MODE NORM 6387 5717204 15 Fig 3 45 Serially connected RTD 710As 1 Connect the TRIG D OUT connector on the rear panel of the first RTD 710A to the EXT ARM IN connector on the rear panei of the second RTD 710A Connect the TRIG D OUT connector of the second RTD 710A to the EXT ARM IN input of the third RTD 710A and so on until ali the instru ments are connected 2 On each RTD 710A connect the input signa to the input connector and the trigger signal to the EXT TRIG IN connector on the front panel Set suitable input parameters s
183. o be examined or analyzed in more detail set the HOLD status by pressing the RESET HOLD key to stop the acquisition This causes the wave form to be stored in RECORD LOCATION 1 Fig 3 47 TRIGGER POINTI 7204 17 Fig 3 47 Simple waveform acquisiton display Transient Waveform Acquisition in this example a signa generator will be set up to pro vide a waveform then turned off until the transient wave form is needed then turned on again to simulate the transient waveform To acquire a transient waveform 1 Connect a signal generator to the CH1 or X BNC in put connector and set it for a 50 Hz x0 5 V sine wave Then turn off the generator 2 Press the INIT key twice to initialize the RTD 710 3 Press the RESET HOLD key to set the HOLD status 4 Press the CH1 INPUT or X RANGE key and when its indicator blinks use the Parameter Entry Knob to set the range voltage to x 1 V 5 The period of the simulated transient waveform is es timated to be about 100 ms Since the present record length is 2K words the sample interval should be about 100 us 100 ms 2048 Press the SAMPLE INTERVAL key and use the Parameter Entry Knob to set the sample interval to 200 us 3 49 Operating Instructions 6 In order to observe the acquisition of the simulated transient waveform the pre trigger mode is used Since the default trigger delay is 400 this places the mage in the 80 ms area 400 200 ys 7 The default tr
184. of the curve data transmission BlNary is conventional binary block format defined in the Codes and Format standard The format is as follows CURVE ccbbb bbs 9eccbbb bbs Where c byte count b binary data high byte first Se checksum ARBitrary is the Definite Length Arbitrary Block format defined in IEEE Std 488 2 The format is as follows CURVE xc cbbb bbs l Where x number of bytes in the byte c count number c byte count b binary data high byte first s checksum Sets the block size of the binary data 2 byte data string when using BFOrmat BlNary lt NRx gt 1024 2048 4096 8192 or 16384 lf lt NRx gt exceeds the value above an error SRQ is issued if EXR is on and the command is ignored This argument is used for BiNary format transfer It is not used for ARBitrary format transfer 5 15 Programming Command Set Header DATa DATa Header AUTocal MONcal Header TESt 5 16 Argument CHAnnel LOCation STArt count BSize Argument STArt RESet Argument MODe TYPe NUMber Table 5 7 Cont WAVEFORM TRANSFER GROUP Link Argument Description Reports the seiected DATa setting Ail responses except BFOrmat are in lt NR1 gt format Reports all DATa settings Example response DATA CHAN NEL CH1 LOCATION 1 START 400 COUNT 2048 BFORMAT BINARY BSIZE 2048 Table 5 8 CALIBRATION GROUP Link Argument Link
185. on Manual Header WAVftm DATa Argument CHAnnel LOCation STAR COUnt BFOrmat BSize RTD 710A Instruction Manual Programming Command Set Tabie 5 7 Cont WAVEFORM TRANSFER GROUP Link Argument CHi CH2 lt NRx gt NRx NRx BlNary ARBitrary lt NRx gt Description Performs the same function as sending the WFMpre and CURVe queries The RTD 710A sends the waveform preamble and then the curve data for the waveform specified by the DATa command Selects the memory channel to be transferred If an illegal channel is requested an error SRQ is issued if EXR is on and the command is ignored Assigns the memory location number for the selected memory channel NRx 21 to 256 for VMOde CHf1 lt NRx gt 1 to 128 for VMOde DUAL if NRx is illegal an error SRQ is issued if EXR is on and the command is ignored Designates the starting memory address at Nen Wave data is sent or received NRBx 2262136 to 524277 Allowable NRx range can be calculated as TRigger DELay record LENgth 1 If lt NRx gt is illegal an error SRQ is issued if EXR is on and the command is ignored Use WFMpre PT Of to determine start from first point Sets the number of data points to be transferred NRx 2 to 262144 if NRx does not match the other setting an error SRQ is issued if EXR is on and the command is ignored Designates the block format
186. on the side and rear panels should be checked every few weeks and cleaned or replaced if dirty to main tain adequate air flow if the interna temperature exceeds a safe operating level a thermal cutout interrupts instrument power then automatically restores it when the temperature returns to a safe level SIGNAL CABLING Depending upon the intended use of the instrument make some or all of the following connections for a CRT monitor the IEEE 488 GPIB interface an external trigger or clock front to rear panel connectors or the direct A D Out CRT Monitor Cabling Using coaxial cables connect the X Y and Z outputs on the rear panel of the RTD 710A to the associated X Y and Z inputs of a compatible display monitor such as the Tektronix 600 Series monitors See the CRT Monitor Out put specifications in APPENDIX B to determine compatibility of other monitors Refer to specific monitor manuals for monitor connection and operating information Because the signals are of fairly low frequency the cable and termination impedances are normally not critical 50 or 75 ohm coaxial cable is typical When the RTD 710A is shipped its X Y and Z output levels are set for 1 V its Z polarity is set positive and its cursor is set for a line These settings are compatible with the inputs for the Tektronix 600 Series monitors 2 4 The RTD 710A uses internal jumpers to select the X Y and Z output levels 1 V or 5V the Z
187. onary Section This offset causes the section to stop just after it passes the Rack Latch Hole Test the correct installation of the Stationary and intermediate Sections by pulling the Intermediate Sections completely out of the Stationary Sections When fully extended the Automatic Latch of the Stationary Section should lock into the Stop Latch Hole of the Intermediate Section such that the Inter mediate Section cannot be pulled completely out of the Stationary Section Also when the Intermediate Section is pushed completely into the Stationary Section it should stop just after its front end passes the Rack Latch Hole INSTALLING THE INSTRUMENT IN THE RACK To install the rackmoutable instrument into the rack Fig Pull out both intermediate Sections as far as they will go At this point they should be locked into the Stationary Sections by the Automatic Latches RTD 710A instruction Manual Servicing instructions o6ocoo0o0Q0QQO o oco bDoooocoo TO INSTALL 1 Puil the intermediate track section to the ae ernas position ent toe UN D 2 insert the instrument chassis sections into the intermediate E sections A 3 Push in the automatic latch buttons shown and push the instrument into the rack until the next set of latches catch 4 Push in the automatic latch buttons shown and push the instrument completely into the rack until the rackmount latch releases lock pa RAT
188. one reads the marking SYMBOLS Symbols in This Manual This symbol indicates where applicable cau tionary or other information is to be found This symbol indicates where special explana tory information is included in the manual o There is no caution or danger associated with the information Symbols as Marked on Equipment hy DANGER High voltage Ss Protective ground earth terminal Zi ATTENTION refer to manual Refer to manual before using viii Power Source The instrument is intended to operate from a power source that will not apply more than 250 Vrms between the supply conductors or between either supply conductor and ground A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation Grounding the Instrument This instrument is grounded through the grounding conduc tor of the power cord To avoid electrical shock plug the power cord into a properly wired receptacle before making any connections to the instrument input or output connec tors A protective ground connection by way of the ground ing conductor in the power cord is essential for safe operation Danger Arising From Loss of Ground Upon loss of the protective ground connection all accessi ble conductive parts including knobs and controis that may appear to be insulated can render an electric shock and there may be high leakage current Use the Proper Power Cord
189. ont Panel Settings The next two examples store and recall front panel set tings using the SAVE and RECALL commands 4041 BASIC Example 100 110 Save recal RTD 710A front panel settings 120 130 Init al 140 Integer status adrs event number 150 Open fl gpibO pri 1 eom lt 0 gt 160 On srg then call srgndir 170 Enable srq 180 Input prompt Enter location number 190 Print 1 SAVE amp str number 400 Print 1 RECALL amp str number 410 End 1000 Sub srahdir 1010 Poll status adrs i gt 1020 Input adrs prompt EVE event 1030 Print Status status 1040 Print Event event 1050 Resume 1060 End RTD 710A instruction Manual Programming Command Set Program explanation 180 Set up environment 170 180 Input location number 1 20 to store settings 190 Send SAVE command to store front panel settings 400 Send RECALL command to restore settings 410 End of main program 1000 SRQ handling subroutine which performs a serial poll and inputs the event code 1060 SPS BASIC Example 100 REM 110 REM Save recal front panel settings 120 REM 130 LOAD INS i 140 ATTACH 1 AS INS 80 1 150 INPUT NM 160 PUT SAVE ASTR NM INTO 1 400 PUT RECALL amp STR NM INTO 1 410 END Program explanation 130 Load the instrument driver 140 Specify RTD 710A at GPIB address 1 as instrument 1 150 Input location number 1 20 to store settings 160 Send SAVE com
190. orm i eckeeies e 3 51 Section 4 INTERFACING IEEE 488 INTERFACE occu see tars 4 4 MESSAGE PROTOCOLS rins 4 1 GPIB CONNECTOR us caves evened 4 1 GPIB CONTROLLER COMPATIBILITY ees oetrer RP 4 1 IEEE 488 INTERFACE FUNCTION SUBSETS UU cates wean qoi ds 4 1 GPIB MODE ADDRESS AND MESSAGE TERMINATOR SELECTOR A os e masceood REA hk 4 2 Section 4 INTERFACING cont Page GPIB INTERFACE COMMANDS 4 2 RESPONSES TO INTERFACE l COMMANDS 3 S3 rx esa bed 4 2 Interface Clear IFC 4 2 Device Clear DCL 4 2 Selected Device Clear SDC 4 3 Remote Enable REN 4 3 My Listen Address MLA and My Talk Address MTA 4 8 Unlisten UNL and Untaik UNT 4 3 Group Execute Trigger GET 4 3 Go To Local GTL S rcx 4 3 REMOTE LOCAL FUNCTION 4 3 GPIB BOSID KEY oo eis seu awe ed 4 4 GPIB COMMAND SET 4 4 STATUS BYTES AND EVENT CODES 4 4 A D OUTPUT INTERFACE 4 4 A D OUTPUT PORT CONNECTOR 4 4 A DOUTPUT GABLE ou s es 4 4 A D OUTPUT TERMINATION 4 4 A D OUTPUT OPERATION 4 6 Section 5 PROGRAMMING COMMAND SET INTRODUCTION OT PT 5 1 COMMAND FORMAT 5 1 Case Dependency 5 1 ni o MADE osna CEDE 5 1 ALGUMENS Loue water E RS 5 2 Multiple Arguments 5 2 Multiple Commands 5 2 Link Arguments 6 5 2 COMMAND DESCRIPTIONS 5 2 Vertical System Control Group
191. ount of data that is sampled within a set period in creases as the interval time decreases These two figures show the difference between the reproducibility of waveform data that contains steep rises and falls 6397 37 Fig 3 24 Waveform derived with a fast sampling interval RTD 710A instruction Manual 6397 38 Fig 3 25 Waveform derived with a siow sampling interval Figure 3 26a shows a slowly changing waveform exam ple containing a high frequency spike it shows what can happen if the sampling interval is slower than the width of the noise spike low sampling rate and the spike occurs at a point that isn t sampled In this case the spike would not be displayed on the screen Fig 3 265 By decreasing the sampling interval higher sampling rate the noise spike should be sampled and displayed as shown in Fig 3 26c However when the spike noise itself is to be observed the sampling interval should either be shortened faster sam pling rate or a breakpoint which is described later should be used and the noise spike windowed and enlarged 3 31 Operating Instructions Aliasing A waveform digitizer involves some unique constraints related to sampling that contrast to the conventional oscillo scope One effect is called aliasing which occurs when the sample frequency is too low in comparison to the analog input signal Fig 3 27 shows the occurrence of aliasing When a sine wave Fig 3 27a is digit
192. p commands Example response OVER OFF USER ON WRI ON RQS ON CER ON EXR ON EXW ON INR ON OPC OFF Table 5 14 EVENT QUERY GROUP Header Argument Link Argument Description EVEnt Queries for the most recent event code returns O if none ex ists It also clears the event buffer RTD 710A Instruction Manual O 5821 Programming Command Set Table 5 15 INTERNAL WAVEFORM ANALYSIS GROUP Header Argument Link Argument WINdow CHAnnel CH1 CH2 LOCation NRx STArt i lt NRx gt STOp lt NRx gt LEVel lt NRx gt WINdow CHAnnel LOCation STArt STOp LEVel MAXimum MiNimum TOP BASE PCRoss 5 22 Description Selects the source waveform channel for subsequent waveform analysis commands If VMOde CH1 is selected CH2 cannot be selected If CH2 is requested an error SRQ is issued if EXR is on Sets the waveform memory segment for subsequent waveform analysis commands NRx 21 to 256 If lt NRx gt does not match other settings an error SRQ is issued if EXR is on and the command is ignored Sets the start of the memory address for the actual measure ment queries lt NRx 2 262136 to 524279 NRx may be calculated as follows TRigger DELay record LENgth 1 NRx must be less than stop address If they are not of the proper size relationship they are swapped If NRx is illegal an error SRQ is issued if EXR is on and the com mand is ignored Sets the end of the address for the
193. pecial Internal Waveform Analysis Group commands that are provided This enables the computer to be used for automatic measurements 7204 22 Fig 3 53 Frequency measurement with CURSOR 1 and 2 RTD 710A Instruction Manual 3 53 Section 4 INTERFACING The RTD 710A contains two interfaces the IEEE Std 488 interface commonly referred as the General Purpose Interface Bus GPIB and the Direct A D Output Port Interface A special application of the GPIB interface is used to obtain hard copies on any plotter that uses HPGL Hewlett Packard Graphics Language such as the Tektronix HC 100 Color Plotter or the Hewlett Packard Thinkjet Printer The RTD 710A can be instructed to out put waveforms via the GPIB either locally from the front panel or remotely by a GPIB controller The IEEE Std 488 interface allows the instrument to be remotely controlled by a GPIB controlier All front panel con trois except the power on switch and the manual trigger key MAN TRIG can be controlled through the GPIB using the Programming Command Set see Section 5 Also an acquired waveform can be transferred to the controller for further processing or waveform data can be transferred from the controller for use as a reference waveform The D rect A D Output Interface allows the intrument to be used as a 10 bit 200 Megasample per second A D con verter The interfa
194. polarity posi tive or negative and the cursor type line or dots If these jumpers need to be changed refer the instru ment to qualified service personnel IEEE 488 Cabling Connect the IEEE 488 cable provided as an optional ac cessory from the rear panel IEEE 488 connector to the bus controller or the nearest instrument on the bus as desired More information on configuring a system is given as part of the IEEE 488 system discussion at the beginning of Section 4 External Trigger and Clock Cabling Make connections to the rear panel connectors as re quired The TRIG D OUT connector provides an RTD 710A trigger signal for application to a device or instrument under test An EXT ARM IN connector provides a means to arm the RTD 710A from and external source An EXT CLK IN connector provides a means to clock the RTD 710A from an external ECL clock signal A CLK OUT connector provides an ECL output clock from the RTD 710A internal 200 Mega hertz clock or the EXT CLK IN connector Check the speci fications for each of these inputs and outputs in Appendix B SPECIFICATIONS An internal jumper selects the rear panel CLOCK OUT signal Refer changing this jumper to qualified service personnel l Front to Rear Panel Connectors Three general purpose BNC connectors provide straight through connections between the instrument s front and rear panels using 50 ohm coaxial cable These connectors provide a convenient method of rou
195. quent envelope times the acquired waveform sampies are compared with the maximum and minimum data of the previously stored data to create envelope data that corre sponds to each of the sampling points The results are stored in the record location and reference memory location Fig 3 37 ACQUIRED RECORD RECORD COMPARISON OF MAXIMUM AND MINIMUM NEW MAXIMUM AND MINIMUM WRITE RECORD LENGTH 32K RECORD LOCATION 4 NOTE THE REFERENCE MEMORY IS ALWAYS AUTOMATICALLY SET TO THE LAST RECORD LOCATION 6397 A9 7204 14 Fig 3 37 Enveloping two or more times Acquired data is displayed two times first in order and sec ond by reversing the order in the above consecutive sample set The resultant display achieves the waveform envelope consisting of groups with two values maximum and mini mum displayed as shown in Fig 3 38 When using the cursor to make measurements on the CRT monitor the even and odd number addresses contain maximum and minimum values respectively 3 42 REFERENCE Fig 3 38 Envelope display The ENV of TIMES can be designated either by 2 n 0 14 or by 99999 which designates an endless number of envelopes In this case the envelope mode repeats until acquisition is terminated with the RESET HOLD key When the ENV of TIMES is 1 a reference memory location is not used therefore full memory length is available The ENV of TIMES is displayed on the Reco
196. r L or Extended L4 Listener LE Basic listener no listen only mode unaddress if MTA Service Request SR SR1 Complete capability Parallel Poll PP PPO No capability Device Clear DC DC1 Complete capability Device Trigger DT Complete capability Controller C No capability Remote Locai I RLI Complete capability GPIB MODE ADDRESS AND MESSAGE TERMINATOR SELECTOR The GPIB operating mode talker or talker listener ad dress 1 30 and message terminator LF or LF EOI selec tions are made with an 8 section binary switch on the instruments rear panel Fig 4 2 INDICATES A SELECTED POSITION 6297 14 7 204 23 Fig 4 2 GPIB parameter switch 4 2 The top section of the switch must have its zero 0 posi tion selected for the instrument to respond to the Program ming Command Set The second section of the switch uses the zero 0 posi tion to select the talker listener operating mode and the one 1 position TON to seiect the Talker ONIy operating mode The third section selects how the instrument recognizes the termination of a message and how it terminates its messages In the zero 0 position EOI the instrument in terprets a data byte received with EOI true as the end of message the intrument terminates its messages by setting EO true with the last message byte in the one 1 position LF EOI the instrument interprets either an LF or a data byte with EOI true
197. r option is not installed an SRQ is issued if EXR is on and the com mand ignored Selects the trigger source Selection defaults to CH1 for TV coupling selections and for SAMple MODe HISpd Selects trigger slope Selection defaults to NEGative if BlSlope PHYs or NHYs is selected with TV coupling selections and an SRQ is issued if EXR is on More TRigger commands on next page RTD 710A instruction Manual Header TRigger TRigger TRigger Argument LUNit LEV1 LEV2 LINe LONStart MODe DUNIt DELay COUpiing SOUrce SLOpe LUNit LEVI LEV2 LINe LCNStart Programming Command Set Table 5 4 Cont TRIGGERING GROUP Link Argument Description PERcent Selects the units of measure for trigger level 1 and level 2 VOLts NRx Sets trigger level 1 lt NRx gt 99 to 49996 in 196 steps NRx in Volts value RANge When external trigger source is selected full scale is 5v If lt NRx gt is illegal it is truncated or limited to a legal hardware setting and a warning SRQ is issued if EXW is on lt NRx gt in volt value takes Range value into account If range value is changed or probe attenuation is changed and level unit is VOLts the level value is automatically changed see above formula When queried the value is lt NR1 gt for a unit or lt NR3 gt l for Volts unit lt NRx gt Sets trigger level 2 lt NRx gt 99 to 99 in 1 steps NRx in Volts
198. r the average and the characteristic of the noise The num ber of acquisitions that can be averaged is 2 to 16384 in 2 steps The greater the number of acquisitions averaged the higher the noise rejection improvement factor of signal to noise ratio This is expressed in the following formula S N IF 10 log N dB where S N IF is Signal to Noise Improvement Factor and N is equal to the number of the acquisitions For example the S N IF is about 3dB for every power of 2 increase of N where N 2 and n 1 14 The results of the average process is displayed on the CRT monitor every 2 acquisitions and the reduction in noise can be observed as the average process continues If the acquisition is set to HOLD status during average pro cessing the results of the number of acquisitions processed to that point are displayed If RESET status is set the aver age process starts over again During the period that the waveform data is being acquired in the average mode the number of the acquisitions being averaged is displayed on the Recording display if the AVE ENV of TIMES key has been selected This allows the operator to observe the ac quisition number when the HOLD status is set curing aver age processing _ Averaging is made at the maximum rate when ARM DE LAY is set to 0 and DISPLAY LOCATION is set to 0 Since it cannot be determined if excessive noise exists in the waveform data when it is being acquired during
199. rcuit Board Retainer attach ing screws but do not unscrew them compietely out of the retainer Then lift the retainer up and out of the chassis 5 Remove the gray ribbon cable at the end of the A56 GPIB Monitor board closest to the power supply 6 Loosen the A 56 board by lifting up on the inner ends of the board ejectors Do not attempt to completely remove the board until after the next step RTD 710A Instruction Manual 7 Lift the board out of the instrument just enough to unpiug the three coaxial cables connected with Peitola con nactors Unplug the coaxial cables and move them aside out of the board removal path B Lift the board straight up and out of the instrument 9 Set the CRT monitor jumpers as desired using Table D 1 and Fig D 6 10 Reinstall the A56 board Circuit Board Retainer Main Chassis Cover and top Cabinet Cover in the reverse order of removal EXTERNAL ARM SIGNAL JUMPER The External Arm Signa jumper allows the selection of the external arm mode Edge or Level In the Edge mode the instrument arms on the positive going edge of the exter nal arm TTL signal In the Level mode the instrument arms when the external arm TTL signal reaches the High state 4430 J470 Y LEVEL X LEVEL Servicing instructions WARNING Hazardous voltages exist inside this instrument when the power cord is connected to a power source To avoid injury disconnect the power cord before remov ing any instrument
200. rd This is graphically shown in Fig 3 31 Extending RECORD LENGTH provides a longer period for the recording of wave form data i l RECORD LOCATION determines to which record the digitized waveform data is written For example it would determine to which of the eight 8 records in Fig 3 31 that the data is written If RECORD LENGTH or RECORD LOCATION settings are modified during data acquisition the current acquisition is automatically halted to allow the previously acquired data to be saved RECORD 1 mE 3 08 7 NUMBER VN V RECORD LENGTH 16K WORDS WAVEFORM DATA RECORD LOCATION 2 VERTICAL MODE DUAL 6397 4457 204 9 Fig 3 31 Memory organization RTD 710A Instruction Manual 3 37 Operating Instructions Sample Rate Switching At Breakpoints in many situations only a small part of the waveform e g the rising edge of a fast pulse is of major interest In these cases sampl ng at a high rate to provide good time resolution for that particular part of the waveform produces a large amount of unnecessary information for the remain der of the waveform The RTD 710A sampie rate switching capability at breakpoints provides a means of changing the sampling interval during an acquisition to expand the impor tant part s of a waveform while compressing the less im portant part s For example when acquiring the risetime and width of a square wave pulse the fast rising edge might be sampled at a 10
201. rding dis play during waveform data acquisition in the envelope mode To set Envelope mode 1 Select the ENV position of the RECORD MODE tog gle key 2 Press HOLD RESET to stop the acquisition LED steady on 3 Press the ENV AVE s OF TIMES key When selected its indicator blinks and the current of TIMES value is dis played in the Recording display 4 Use the Parameter Entry Knob to set the desired ENV of TIMES l RTD 710A instruction Manual NOTE When the ENV of TIMES is two or more the TRIG MODE COMP IN and COMP OUT cannot be set If either of these trigger modes is selected the ENV of TIMES automatically changes to one The BREAK POINT function and SAMPLE MODE HI SPD cannot be used in the envelope mode The enve lope record is made at the maximum rate when ARM DELAY and DISPLAY LOCATION are set to 0 The timing accuracy for the data acquired by envelope mode is 1 2 the sample interval CONTROL Cursor Operation Cursors allow measurements to be made of various waveform parameters By pressing either the CURSOR 1 or CURSOR 2 keys a cursor is displayed on the waveform on the CRT monitor The waveform channel selected by the cursor is indicated by the DISPLAY indicator CH1 or CH2 By pressing these keys over again it is possibile to change the channel of the waveform selected by the cursor or to remove the cursor Once the cursor is displayed on the waveform it can be scro
202. refer to Appendix B SPECIFICATIONS A D OUTPUT PORT CONNECTOR Do not connect or disconnect a cable to the A D Out put Port while the instrument is turned on as there is voltage applied to one of the connector pins Making or breaking the connection with the intrument turned on may cause damage to the intrument or the con nected device The connector for the A D Output Port is an AMPMODU MT type 50 pin connector mounted on the rear panel with pinouts assigned to signal lines as shown in Fig 4 3 As shown in Fig 4 3 the connector is keyed at the top and bottom to ensure that the output cable connector is properly connected A D OUTPUT CABLE The cable used for connecting to the direct A D output port should be shielded The recommended cabie is listed in Optional Accessories in Section 1 GENERAL INFORMA TION The signa assignments on the cable connectors are on the same pins as those for the A D Output Port connec tor on the RTD 710A See Fig 4 4 for the pin locations 4 4 The optional output cable has both connectors keyed for proper connection The end that fits into the A D Output Port connector is keyed at the top and bottom with small cutouts to fit the tabs on the connector Fig 4 4 The dis tant end connector is keyed with a small tab at the center When facing this connector with the tab to the right pin 1 is at the top left of the piug Fig 4 4 The connector housing of the distant end of the A D outp
203. rgument where standard notation BNF is defined as follows lt gt delimits required arguments elements or parameters delimits optional arguments elements or parameters indicates previous element may be repeated one or more times um means is defined as connects a link argument to an argument j separates multiple arguments of the same com mand header separates multiple commands RTD 710A instruction Manual in the following command examples AUTocai CH1 CH1 RANge EI CH1 RANge 10 CH1 RANge 10 UNit VOLts the first and second contain only a header the third a header and an argument the fourth a header an argu ment and a link argument and the fifth a header and two arguments each with a link argument 4 Case Dependency in the command set listing headers arguments and link arguments are shown in upper and lower case characters The instrument accepts any abbreviated command that con tains at least the characters shown in uppercase The com mand can be made more readable by adding the characters shown in lower case The command may be entered in all upper or all lower case characters or any combination thereof Header Headers represent a major logical grouping of control functions such as CH1 TRIgger and RECOrd Every com mand contains at least a header which may comprise the entire command for example AUTocal Whenever a header is followed by a ques
204. rigger point to cursor position 1 T Reciprocal of T frequency H is calculated and displayed CURSOR 1 AV i Voltage at CURSOR 1 posi and tion voltage at CURSOR CURSOR 2 2 position Time conversion at CURSOR 1 position time conversion at CURSOR 2 position Reciprocal of AT frequency is calculated and displayed Cursor measurements can be made in both HOLD or RE SET mode of acquisition but when in ROLL mode the cursor is displayed only in the HOLD state Cursor measurements can be performed in any record containing stored data however the measurement is based on the acquisition parameter settings that were set when the waveform was acquired and stored For example if the present front panel settings differ from those that were set when the waveform data was acquired then the settings that were set at the time of acquisition take precedence over those currently set 3 43 Operating instructions NOTE Time and frequency measurements cannot be made on waveforms that were acquired using an external clock as the external clock frequency is unknown by the RTD 710A if two cursors are being used on two different wave forms and the sample intervals for the waveforms are different the time and frequency measurements are made using the sample interval of the waveform using CURSOR 1 Since there is some delay between an actual trigger occurrence and trigger recognition
205. rite Test Checks the read write capabilities of the system RAM 5 Waveform Display RAM Read Write Test Checks the read write capabilities of the waveform display RAM 6 GPIB Function Test Checks the operation of the GPIB adapter IC and the checksum adder used when trans mitting data over the GPIB 7 DMA Register Read Write Test Checks the read write capabilities of the DMA register used during high speed data transfers over the GPIB 8 Circuit Test Checks the internal hardware of the instrument 9 Waveform Data RAM Read Write Test Checks the read write capabilities of the waveform data RAM INITIALIZATION Once the self test is completed the RTD 710A automati cally initializes to the settings that existed prior to the power being turned off the last time and the front panel seven segment LED displays show the previous value settings for the functions listed in Table 3 2 If the previous settings were not properly recorded the instrument initial izes to the default settings shown in Table 3 1 RTD 710A Instruction Manual Operating Instructions Table 3 1 DEFAULT CONTROL KEY SELECTIONS VALUES Front Panel Key Selection Vaiue Programming Command VERT MODE DUAL VMOde DUAI BW LIM 20 MHz OFF BWLim OFF RANGE CH1 CH2 50V CH1 CH2 RANge 50 OFFSET CH1 CH2 0 i CH1 CH2 OFFset 0 COUPLING CH1 CH2 CH1 CH2 COUpling AC MODE Trigger TRigger MODe AUTo SOURCE Trigger CH1 TRigger SOUrce CH1 7
206. rms Data is sent in format yimax yimin y2max y2min and when received by the RTD 710A it is treated as enveloped data Sets the sample interval value for waveforms input by the CURVe command If XUNit is SEC NRx is from 5 0E 9 to 200E 3 If XUNit is EXT NRx is from 4 0E 0 to 1 0E 7 Sets the input Offset for waveforms input by the CURVe com mand If NRx is illegal it is truncated and limited to match a legal sample interval and a warning SRQ is issued if EXW is on When queried the value is NR1 lt NRx gt 199 to 199 of full scale in 1 steps Sets trigger delay value for waveforms input by CURVe command A negative number indicates pretrigger Sets the unit of measure for the Sample interval value for waveforms input by the CURVe command If XUNit is SEC the XINcr value is in seconds If XUNit is EXT the XINcr value is the scaling multiplication factor for the external clock Query only ighored if sent as setting command Responds with the ground level of the input with 0 Offset which is fixed at the center of full scale range i e 512 Sets the input Range value for waveform input by the CURVe command lt NRx gt 1 0E 1 to 0E 2 When an ilegal value is received the argument is truncated and limited to a iegal value and a warning SRQ is issued if EXW is on When queried the value is NR3 Volts per point is determined by 2 YMULT 1024 Query only ignored if sent
207. ront panel 3 11 Recording section of front panel 3 12 Control section of front panel 3 15 Connectors and power section of front pane a de si Mera prm 3 19 RTD 710A Rear panel 3 20 _ Input range setting too jarge 3 22 Input range setting correct 3 23 Input range setting too small 3 23 Overrange display 005 3 23 Bi slope trigger Level 1 gt Level 2 3 25 Bi slope trigger Level 2 gt Level 1 3 25 4 Hysteresis Level 1 gt Level 2 9 26 4 Hysteresis Level 2 gt Level 1 3 26 Hysteresis Level 1 gt Level 2 3 26 Hysteresis Level 2 gt Level 1 9 26 COMP IN trigger mode representation 3 28 Method of data comparison 3 29 Pre trigger operation 5 3 30 Post trigger operation eee eee 3 31 Waveform derived with fast sampling Intervalos css wood ete deere eee S eiut 3 31 Waveform derived with slow sampling 1 4 irc 3 31 Examples of sampling rates for noise SOKOS ci cleri xat deis augers mate a 3 32 Display of aliasing eom 3 32 Display with perceptual aliasing 3 33 Redispiay of perceptual aliasing EXP BUB cob dai o Baron eMe ede ud e MR E 3 33 RESET HOLD function and data acdguisitione e Sv ener dn x NOR AOI gu d 3 35 Memory organization saaana aruna 3 37 Breakpoint settings with pre trigger and DOSUIIISBE rcr e awh a e
208. s an SRQ is issued if EXR is on and the command ignored Selects either dot or vector line display mode for the CRT monitor output signal There are two algorithms for data thin out method for horizontally compressed display ranging X1 2 to X1 128 One is Even Spaced thin out and the other one is Envelope The thin out algorithm is automatically determined by the INTerpol setting Dot mode uses the Even Spaced al gorithm Line mode uses the Envelope algorithm Dot mode offers faster display update Reports the selected DiSplay setting LOCation is in NR1 format Reports all DiSplay settings Example response DISPLAY CHANNEL CH1 LOCATION 1 MODE YT INTERPOL LINE Selects the horizontal display scaling factor The display memory is 2048 points When a fraction is used in HZOom e g 1 128 the data is th nned out to view a longer length waveform in 2K points The numerator is the length of the data to be displayed Using the example 1 128 this takes a 256 K waveform and divides it down using the thin out algo rithm to the 2 K display memory Reports the horizontal scaling factor of the display Example response HZOOM X1 RTD 710A Instruction Manual 5 11 Programming Command Set Table 5 5 Cont CURSOR AND DISPLAY CONTROL GROUP Header Argument Link Argument Description VZOom X1 4 Selects the verticai scaling factor for the display A fraction X1 2 compresses the display data If an integer number 1 32 is X1
209. s SRQ 2900 SROENABLE G0 2910 RETURN 3000 REM Process for Write End SRQ 3900 SRQENABLE 80 3810 RETURN 4000 REM Process for Other SRQ 4900 SROENABLE G0 4910 RETURN NOTE Each SRQ handler must execute an SRQENABLE 0 to enable subsequent SRQs after completion of the necessary processing 5 28 Program Explanation 130 Load the instrument drive 140 Disable SRQ interrupt on GPIB interface O 150 Assign RTD 710A at address 1 as instrument 1 160 Jump to line 1000 for Power on SRQ 170 Jump to line 2000 for Illegal Status SRQ 180 Jump to line 3000 for a Write End SRQ 300 190 Jump to line 4000 for other SRQ 200 Disable subsequent SRQs during SRQ process 210 Enable for subsequent SRQs Set Query Commands and Responses The next two examples send commands to the RTD 710A and receive responses 4041 BASIC Example 100 110 Send commands and queries to RTD 710A 120 and receive responses 130 149 Init all 150 Integer status adrs event 160 Open fl gpibO prisi eom 0 170 On sra then cali srghdlr 180 Enable srq 190 Dim mesag to 500 respons to 1000 200 Repeat input prompt ENTER MESSAGE TO SEND TO RTD 710A mesag 210 Print fi mesag 220 If pos mesag 1 1 then goto repeat 230 Input 1 respons 240 Print RESPONSE FROM RTD 710A IS n respons 250 Goto repeat 260 End 1000 Sub srqhdir 1010 Poli status adrs l 1020 Input 1 prompt EVE event 1030 Prin
210. s and power section of front panei RTD 710A Instruction Manual 3 19 Operating Instructions REAR PANEL Refer to Fig 3 9 for location of items 1 through 14 CRT MONITOR OUT X Y Z Connectors 3 20 BNC connectors that provide the X Y Z analog equivalent of the waveform data stored in memory for display on a suitable CRT monitor Refer to Ap pendix B for the CRT output specifications The amplitude of the output voltage is internally selectable for 1 V or 5 V It is set to 1 V at the fac tory If the amplitude needs changing refer the in strument to qualified service personnel TO FRONT PANEL 1 2 3 Connectors BNC connectors that provide straight through con nection to the FROM REAR 1 2 and 3 connectors on the front panel The maximum input voltage is 40 V dc peak ac GPIB Connector Provides for connection to a standard IEEE 488 bus The electrical and physical arrangement of the 24 pin connector conforms to the IEEE General Pur pose interface Bus Standard 1978 For more in formation see Section 4 INTERFACING GPIB Parameter Switch An eight element binary coded switch that selects the GPIB mode and address For setting informa tion see Section 4 INTERFACING A D OUT Connector A 50 pin connector that provides CH 1 and CH 2 digitized data output The output is an ECL compatible differential signal For more information see Section 4 INTERFACING TRIG D OUT Con
211. sfer Group Waveform Transfer Group RTD 710A Instruction Manual WAVEFORM TRANSMISSION Overview Up to 256 different waveforms with a record length of 1024 words each may be acquired and stored in the RTD 710A for later use CH1 Only Mode Waveform data stored in the RTD 710A can be selected and transmitted to a GPIB controller The general format of the transmitted waveform data closely conforms to the Tektronix Codes and Formats Stan dard which specifies the form of transmission required for the waveform data The two parts of the waveform data are i Preamble The preamble consists of a header string WFMpre followed by a series of arguments that identify waveform items such as waveform size scaling informa tion format specification and similar items required to scale the binary waveform into voltage values and auxili ary information such as identification strings and units 2 Curve Data The curve data is a set of the actual waveform point data In the RTD 710A a waveform point may have a value between O and 1023 Waveform transmissions may include either preamble and curve data or both Separate queries may be used to elicit preamble or curve data or both Waveform Preamble The RTD 710A can transmit data of 2 to 262144 points to the controller or can receive 2 to 262144 points of data from the controller Each curve when interpreted in accord ance with its corresponding preambie constitutes a com plet
212. sor location reia tive to ground Watch this value while moving the cursor to the maximum location As the cursor enters the peak voit age vaiue it becomes very sensitive 3 51 Operating instructions 3 Press the MEASURE T AT key to display the period between the indicated cursor point and the trigger point on the Control display Fig 3 50 In the remainder of this example the HORIZ ZOOM fea ture and both cursors CURSOR 1 and CURSOR 2 will be invoived in the measurements 4 Since 2048 points are being displayed and waveform detail is small and difficult to see press the HORIZ ZOOM key When its indicator is blinking use the Parameter Entry Knob to set the horizontal zoom factor in the Control display to 4 When this is done the CURSOR 1 portion of the wave form is expanded in the horizontal direction as shown in Fig 3 51 7204 20 Fig 3 51 Voltage measurement with 4X horizontal zoom Since the stationary portion of the waveform moved out side the screen press the CURSOR 1 key then turn the Parameter Entry Knob to move CURSOR 1 towards the right side of the screen When it reaches the edge the screen scrolls and the stationary portion of the waveform moves towards the center of the screen 5 in order to get the minimum peak value as a reference for the amplitude press the MEASURE V AV key and move CURSOR 1 to the minimum peak value using the Parameter Entry Knob Press the CURSOR 2 key When i
213. ssion of multiple waveform data the REPeat command may be used to minimize the access time for the controller by not requiring the controller to send the CURVe query before each transfer The REPeat comand uses the format REPeat NRx which performs NRx acquisitions and immediate trans fer to the waiting controller if NRx is set to O or less RTD 710A Instruction Manual Programming Command Set it is rounded to 1 If lt NRx gt is set greater than 65536 it is limited to that number The REPeat command has these restrictions 1 For the DATa command a DATa CHAnnel is set to CH1 if VMOde is CH1 b DATa LOCation is set to RECORD LOCATION c DATa STAR is set to TRIG DELAY d DATa COUnt is set to RECORD LENGTH 2 TRigger MODe is set to SGL 3 RECOrd MODe is set to NORm if it is ADV 4 The message terminator uses EOI regardiess of rear panel setting of GPIB parameter switch PROGRAMMING EXAMPLES The programming examples presented here show how to control the RTD 710A through a Tektronix GPIB Con trolier using the Tektronix 4041 BASIC and the Tektronix SPS BASIC languages Each example is first listed then each entry is explained except remarks entries Processing an SRQ if the RTD 710A asserts the SRQ signal the GPIB con troller can poll each device to determine which is request ing service The RTD 710A responds only to a serial poll The next two examples show how to serial poll
214. struments The trigger status setting must all be the same In this case the arm signal uses the external arm and should be synchronously supplied to ail the units 2 When using an external trigger the trigger signal is input to all instruments Or the trigger is input into EXT TRIG IN of the first RTD 710A then its TRIG D OUT is input _to the EXT TRIG IN of the second unit and so forth until all units are connected The setting of the arm delay shouid either use an external arm as in the preceding paragraph or all the arms should be set to zero and the units should be reset starting with the last unit and working forward to the first By using the above methods or a mixture of them the RTD 710A instruments should be synchronized and parallel operation executed NOTE Prior to parallel operation auto calibration should be conducted on all the RTD 710A instruments in order to provide units with the least possible variance RTD 710A Instruction Manual SIMPLE WAVEFORM OPERATIONS in the next few paragraphs examples of repetitive wave form acquisition transient waveform acquisition acquisition of a waveform using sample rate switching making cursor measurements and using the compare trigger modes will be presented Each of these examples assume the RTD 710A instruments is turned on and ready to operate and a CRT monitor is connected and operational Repetitive Waveform Acquisition To acquire a repetitive waveform
215. surement modes Example response MEASURE VOLT OFF TIME OFF FREQUENCY OFF Value Reports the measured value which is returned in NR3 for mat if the cursor function is off or a measurement cannot be made is returned if requested measurement can t be made because time scaie is different between CH1 and CH2 an error SRQ is issued if EXR is on 5 12 RTD 710A Instruction Manual Header Argument Programming Command Set Table 5 7 WAVEFORM TRANSFER GROUP Link Argument Description WFMpre WFid ENCdg NR Pt PT Fmt XINcr YZEro PT Off XUNIt YOFF YMUIt YUNIt BYT hr RTD 710A Instruction Manual lt ascil string BiNary lt NRt gt lt NRx gt lt NRx gt NRx SEC EXT 512 NRx Query only ignored if sent as setting command Responds with the waveform source and location e g WFMPRE WFID CH1 LOCATION1 i Query only ignored if sent as setting command Responds with curve encoding which is fixed at binary e g WFMPRE ENCDG BINARY Query only ignored if sent as setting command Responds with the number of data points in the source waveform which is set by the DATA COUNT command e g WFMPRE NR PT lt NRx Defines how to interpret the curve data Y format means that x information is implicit and the data points set are the y value and each point is sequential in time order ENV format is used for enveloped wavefo
216. t XiNcr is in lt NR3 gt format PT Off is in NR1 format YZEro is in NR1 format YOFf response fixed 512 YMUtt is in NR3 format YUNit response fixed V BYT nr response fixed 2 BN Fmt response fixed RP BIT nr response fixed 10 BKPt is in NR1 NR3 format Reports all waveform preamble items Example response WFMPRE WFID CH1 LOCATION1 ENCDG BINARY NR PT 2048 XUNIT SEC XINCR 10 0E 9 PT FMT Y PT OFF 400 YZERO 0 YOFF 512 YMULT 2 5E O YUNIT V BYT NR 2 BN FMT RP BIT NR 10 BKPT 0 10 0E 9 BKPT 520 100 0E 9 Sends waveform data from the controller to the RTD 710A without the preamble The format of the argument waveform data is defined by the DATa BFOrmat command Target memory channel memory segment start address etc are also defined by using the DATa command Repeated binary block transfer is not allowed for this command Sends binary block waveform data from the RTD 710A to the controller without sending the preamble The source memory channel memory segment start address etc are defined by using the DATa command For details of binary block data refer to the DATa BFOrmat command description Response is CURVE binary block data binary block data Repeated binary block transfer is acceptable when DATa BFOrmat is set to BINary not acceptable with ARBitrary mode For binary block data details see DATa BFOrmat command description RTD 710A Instructi
217. t Status status 1040 Print Event event 1050 Resume 1060 End Program Explanation 140 Set up the environment 180 l i 200 Input the set or query command a 210 Send the command to the RTD 710A 220 Hf set command go to line 190 otherwise line 230 230 Establish response buffer resp 240 Input the response to the query command 250 Display the response 260 Go to line 190 270 End of main program 1000 SRQ handler performs serial poll and displays status l 1060 RTD 710A instruction Manual SPS BASIC Example 100 REM 110 REM Send commands and queries to 120 REM RTD 710A and receive responses 130 REM 140 LOAD INS 150 ATTACH 1 AS INS 0 1 160 PUT CHE RANGE 5 0 INTO 1 200 GET A FROM 1 ID 210 PRINT A 220 GET H L FROM 1 LENGTH 230 PRINT RECORD LENGTH L POINT Program explanation 140 Load the instrument driver 150 Specify RTD 710A at GPIB address 1 as instrument 1 160 Set CH1 input Range to 5 0 volts 200 Send query ID and store response A 210 Display the response A 220 Send query LENGTH separately store response header H and length L 230 Display the response length Simple Waveform Data Transfer Using Binary Format to the Controller The next two examples transfer CH1 waveform data from the RTD 710A to the controller 4041 BASIC Example 100 110 Get a waveform from Chi Location 1 120 Start 400 count 204
218. t encoding pin the true input range is displayed automatically on the RANGE display Non encoded probes provide an input signal but the input range indicator may not reflect the probe scale factor Coaxial Cable When using coaxial cable rather than a probe to feed a signal into the instrument it is essential that high quality low loss cable be used to ensure that the true frequency response characteristics of the input signal are transferred Also the coaxial cable should be terminated in its charac teristic impedance RANGE Key The Input Range represents the RTD 710A input sensi tivity For example when RANGE is set to 1 V its input sensitivity is 1 V With 10 bit resolution its resolution is less than 2 mV If the RANGE is 100 mV its resolution is less than 200 uV 3 22 To set the RANGE 1 Press the RANGE key for the channel to be set The current RANGE value is displayed in the input display 2 Whenever the RANGE key indicator is blinking the Parameter Entry Knob can be used to set the RANGE value The available RANGE is 100 mV to 50 V in 28 steps The adjusting sequence has been improved from the tradi tional 1 2 5 sequence to a 1 1 25 1 6 2 2 5 3 2 4 5 6 2 8 10 sequence When an input signal exceeds the RANGE setting the upper and lower portions of a signal displayed on the moni tor will be clipped This s due to the occurrence of overrange which is discussed further in the next topic Effi
219. tage sensi tivity when setting RANGE when setting OFFSET it shows the offset as of full scale or as the volt age subtracted from the signal input Units are or mV millivoit or V volt The descriptions for RANGE and OFFSET further describe the displayed units For out of range inputs an overrange and underrange LED in the display turns on and the digi VERT MGOE mDUAL DEH ONLY tizer asserts RQS on the GPIB if RQS is ON These pu indicators reset turn off on the next acquisition if l 9o BW LIM MB no X K COUPLING COUPLING j h 6397 73 7290 2 the condition goes away Fig 3 3 Vertical section of front panel 3 6 RTD 710A Instruction Manual 2 RANGE A push to select key with LED When selected the key s LED blinks to signify that the input voltage range can be changed by turning the Parameter En try Knob Also the current range is displayed in mV or V on the Input display The range can be set from 100 mV to 50 V in a 1 1 25 1 6 2 2 5 3 2 4 5 6 2 8 sequence 1 V to 500 V when a 10 x probe is used After a range Mii the AUTO CAL func tion executes The overrange indicator up arrow turns on when the input signal exceeds the RANGE setting the underrange indicator down arrow turns on when zero data is acquired OFFSET A push to select key with LED When selected the current value of dc offset is displayed in the Input display and the key s LED blinks to indicate that
220. tains installation instructions including power signal cabling and pack aging for reshipment Section 3 Operating Instructions contains three major subsections The first provides initial power up instructions the second describes the controls connectors and indicators and the third contains information on instrument familiarization Section 4 Interfacing describes the instrument s IEEE 488 GPIB interface and the A D Output interface Section 5 Programming Command Set describes the compiete set of commands to control the instru ment through its IEEE 488 interface and provides programming examples Section 6 Instrument Options lists and describes instrument options Appendix A SRQ Status Bytes and Event Codes explains the IEEE 488 status byte and contains tables of event codes returned by the EVENT query command Appendix B Specifications Contains tables describing the environmental electrical and mechanical characteristics of the instrument Appendix C ASCII amp GPIB Code Chart Contains a standard 7 bit ASCII and GPIB Code chart that includes the decimal octal and hexadecimal values for the ASCH character set and the GPIB commands Servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servic ing other than that contained in operating instructions unless you are qualified to do so Appendix D Servicing Instructions Contains limited servicing instruc
221. ted and is blinking continuing to push the key toggies the display between of full scale and volts For example if RANGE is selected and set to 10 V then OFFET is selected of full scale and set to 10 representing 10 of full scale then OFFSET is pushed again representing volts the display will show 1 00 V To shift a waveform towards the top of the CRT monitor screen decrease the dc offset by turning the Parameter En try Knob counterclockwise CCW To move the waveform towards the bottom of the screen increase the dc offset by turning the Parameter Entry Knob clockwise CW Opera tion is similar to a differential amplifier where the ug offset contro adjusts the negative input level When reading the voltage with the cursor MEASURE MENT commands the dc offset value is not included When the waveform is transferred over the GPIB the dc offset is included Input Bandwidth Filter The RTD 710A has a 20 MHz low pass input filter which can be used to remove unwanted high frequency compo nents including noise and reduce PIS tenes later in the Time Base section To select the filter push the BWLIM 20 MHz key Its LED indicator should iluminate to show selection To deselect the filter push the key again and the LED will go out 3 24 Automatic Calibration AUTO CAL In order to ensure the high analog accuracy of the RTD 710A an automatic calibration feature designated simply as Auto Cal hereinafter
222. the CURve query NRx 21 to 65536 in increments of 1 Forces TRigger MODe SGL and RECOrd MODe NORm Reports the number of acquisitions Response is in NR1 format For TRigger MODe INComp or OUTcomp the returned value indicates the number of compare operations that oc curred before entering the HOLd state For TRigger MODe AUTo NORm or SGL the returned value indicates the num ber of acquisitions that occurred before entering the HOLd state For RECOrd MODe ADV the response indicates the last record location that compieted acquisition before entering the HOLd state l l An intermediate number is returned if the HOLd state has not been entered The controller shouid monitor the OPC SRQ to determine when the HOLd state is entered Programming Command Set Header Table 5 4 TRIGGERING GROUP Link Argument TRigger Argument MODe AUTo Description Selects the trigger operating mode In compare mode IN or 5 8 DUNIt DELay COUDpling SOUrce SLOpe NORm SGL iNComp OUTcomp POInt TIMe lt NRx gt AC HFReg LFReg DC LiNes FLD1 FLD2 CH1 CH2 EXT POSitive NEGative BiSiope PHYs NHYs OUT 256 K record length is not permittted If record length is 256 K and EXW is on a warning SRQ is issued More than two envelope times and compare mode are incompatible If compare mode is set envelope times is set to 1 Selects the units of measure for the trigger delay
223. the GPIB 3 Whenever one of the SAMPLE INTERVAL changes shown in Table 3 7 occurs RTD 710A instruction Manual Table 3 7 SAMPLE INTERVAL AUTO CAL Sample Sample Interval Change Mode I AM A A A A W M LL M M M HI SPD 1 When setting or exiting a sampie inter val of 5 ns or 10 ns tween INT and EXT and the INT sam ple interval was or becomes 5 ns or i 10 ns When setting or exiting a sample inter val of 10 ns or 20 ns 2 When switching the clock source be tween INT and EXT and the INT sam ple interval was or becomes 10 ns or 20 ns 4 The INIT key is pressed twice or the INIt ALL com mand is received over the GPIB 5 When the front panel setting are recalled from the front panel or the RECall command is received over the GPIB NOTE Auto calibration may be iricomplete if made with an input signa applied to the front panel input Discon nect vertical input signal before performing auto calibration The keys on the front panel are locked out and the data designated by the RECORD LOCATION is erased during Auto Cal execution Auto Cal execution normally takes less than 1 2 sec ond however there are times when instrument Setup may take a few seconds TRIGGER Trigger Source A trigger signal source is selectable internally from the Channel 1 or Channel 2 input or externall
224. the RTD 710A 4041 BASIC Example 100 110 Poll the RTD 710A in response to SRQ 120 130 Init all 140 Integer status adrs event 150 Open fl gpibO prizl eoms 0 160 On srq then call srqhdir 170 enable srg 500 End 1000 Sub srghdlr 1010 Poll status adrs 1020 Input adrs prompt EVE event 1030 Print SRG from adrs Status istatus 1040 Print Event event 1050 Resume 1060 End 5 27 Programming Command Set Program Explanation 130 initializes the 4041 140 Creates integer variables status adrs event 150 Assigns RTD 710A as logical unit 1 at primary address 1 with EOM character set to EOI 160 Call subroutine srghdi when SRQ occurs 170 Enables the SRQ interrupt 500 End of main program 1000 Beginning of subroutine srqhdir 1010 Serial poli device at GPIB address 1 RTD 710A 1020 Send EVENT query to RTD 710A 1030 Displays the status byte 1040 Displays the event code 1050 Returns to main program 1060 End of subroutine srqhdir SPS BASIC Example 100 REM 110 REM Poll the RTD 710A in response to SRQ 120 REM 130 LOAD INS 140 SRQDISABLE GC 150 ATTACH 1 AS INS 80 1 160 WHEN 1 HAS POW GOSUB 1000 170 WHEN 1 HAS ABN GOSUB 2000 180 WHEN 1 HAS 300 GOSUB 3000 190 WHEN 1 HAS SRQ GOSUB 4000 200 LOCKSRQ 210 SRQENABLE 80 1000 REM Process for Power on SRQ 1900 SRQENABLE 80 1810 RETURN 2000 REM Process for Illegal Statu
225. the aver age mode it is necessary to pay attention to the setting of the trigger If a trigger is generated due to noise the results of the average processing will be inaccurate Therefore it is important that a stable trigger be generated by using the hysteresis trigger slope an external trigger signal etc To set the average mode 1 Set RECORD MODE to AVE 2 Set HOLD RESET to HOLD 3 Press the ENV AVE OF TIMES key When selected the key indicator blinks and the current of Times setting is displayed in the Recording display 3 40 4 Use the Parameter Entry Knob to set the number of acquisitions that are to be averaged NOTE The maximum length of the waveform data that can be average processed is 8K words per channel if an amount greater than this is designated only the first 8K words of data is averaged In the average mode the RECORD LENGTH can be set only to 128K words or less Auto Advance Mode Setting RECORD MODE to ADV ance sets the Auto Ad vance mode permitting data to be written to many memory locations Fig 3 35 i The Auto Advance mode is useful for capturing and ob serving the closely occurring transient waveforms and look ing for random events It also allows for quick acquisition of slow repetitive single shot events such as an echo signal in this mode the number of auto advance locations deter mines the number of snapshots that are taken of the input signal and stored in waveform m
226. thin a record by rotating the Parameter Entry Knob The set ting is for post trigger while the setting is for pre trigger The default value is 400 The following two types of display can be alternately selected by pressing this key while the key LED is blinking PT Points Number of Sampling Clocks Trigger delay is displayed in points number of sampling ciocks The range is from present record length 8 to 262136 in increments of 8 when sample mode is set to normal When the sample mode is high speed the range is from present record length 16 to 262128 in increments of 16 RTD 710A Instruction Manual Operating Instructions TIME Trigger delay is displayed in seconds as a 6 digit rounded value and polarity display The time is the product of the number of sampling clocks and the sampling interval When the sampling clock source is set to EXT TIME cannot be displayed NOTE When the record length is shortened while the trigger delay value is negative the value of the trigger delay is automatically reset to record length after shortened 8 or 16 if the trigger delay value is larger than the new record length TRIG SOURCE The following two keys select the trigger signal source INT EXT A push to select key with LED that alter nately selects either an INT internal source the default value or EXT external source trigger When INT is selected the source of the trig
227. ti vated using the DOT LINE key When a DOT dispiay is not being expanded waveforms are reproduced relatively nicely due to the large number of dots 2048 a high resolution monitor offers Fig 3 41 However as the waveform is expanded the number of ac tuai waveform samples dots decreases 2X 1024 4X 512 etc and waveform reproduction may begin to suffer degradation The use of a LINE dispiay at this point creates new data for the expanded section by using the existing dots and vector interpolation linear interpolation to connect the dots with straight lines thus the expanded waveforms are reproduced with higher visual quality Fig 3 42 When a horizontal zooming ratio of 1 2 or smaller is used DOT LINE switching provides the selection of the data thin out algorithm for compressed waveform display If the DOT display is compressed the instrument adopts the even spaced thin out algorithm to select data unintention ally thus the characteristic data may be lost even though this display is quickly updated When the LINE display de fault value is compressed compression is done with an enveloping algorithm thus maximum and minimum data is preserved although display update is slower For example any narrow spike pulse is displayed even when com pressed at a 1 32 ratio l RTD 710A Instruction Manual Operating instructions During the period that the instrument displays the com pressed waveform in LINE mod
228. ting signals between the front and rear panels of the RTD 710A and a device or in strument under test Direct A D Output Connect the A D Out cable provided as an optional ac cessory between the A D OUT connector on the rear panel and a compatible instrument This output provides digitized data outputs for CH1 and CH2 For more information refer to Section 4 RTD 710A Instruction Manual TABLE TOP USE The RTD 710A may be operated with the front raised by lifting the front of the instrument and extending its front bail RACK LATCHES Before the RTD 710A can be pulled out of a rack the two 2 security screws that may be installed at the top of the Rack Handles need to be removed and the Rack Latches need to be unlocked The rackmountable RTO 710A incorporates a spring latch type of rackmount latch release built into the rack han dies at each side of the instrument Fig 2 2 Once the instrument is installed in the rack to release the latches pull out on both rackmount latch releases until they stop Con tinuing to pull out on the latches causes the instrument to slide out of the rack Once the instrument is out of the rack push in the latches To relatch the instrument push it com pletely into the rack using the rack handles and rackmount latch releases until the spring latches catch For applications where additional racking security is needed the rack handies at each side of the instrument have holes for
229. tion mark it makes the command a query command Most commands can be queried to the argument level by attaching a ques tion mark to the header and adding the appropriate ar gument This argument specifies the information level for the requested response if a link argument is specified in a query command the query is ignored and an error SRQ is issued Cn i Programming Command Set The following are examples of valid queries CH1 CH1 COUpling and the following are examples of invalid queries which should invoke an error SRQ CH1 COUpling AC TRigger SOUrce CH1 Arguments Most commands have arguments that are used with a header to further define what action to take or to specify what is being queried Some arguments are satisfied with a single word for example BWLim ON while other arguments require a link argument for example TRigger COUpiing AC where AC is the link argument Whenever arguments follow a header there must be at least one space between the header and the first charac ter of the argument Whenever an argument is followed by a link argument it must be separated by a colon Multiple Arguments Whenever a header has multiple arguments or multiple arguments with link arguments they may be listed with the same header but each argument link argument set must be separated with commas for example CH1 RANge 10 COUpling AC OFFset 20 This command string is equival
230. tions for changing the power supply operating voltage selecting internal CRT monitor output jumpers and installing rackmounting hardware ii RTD 710A instruction Manual TABLE OF CONTENTS Page SHEP ACE ic vai oen aeos quand ES i TABLE OF CONTENTS ade E iii LIST OF ILLUSTRATIONS isses ettet vi LIST OF TABLES 4 cans t Dou iiS eb ERE EN vii OPERATORS SAFETY SUMMARY s sess viii SERVICE SAFETY SUMMARY sees ix Section 1 GENERAL INFORMATION DESCRIPTION Coso e ee eines 1 1 SPECIFICATIONS oau sese 41 STANDARD ACCESSORIES 1 1 OPTIONAL ACCESSORIES 1 2 Section 2 PREPARATION FOR USE SAFETY ner ora n tat 2 1 CHECKING LINE VOLTAGE 2 CHECKING THE LINE FUSE 2 2 POWER CORD ceo en b my 2 2 INSTRUMENT COOLING 2 4 SIGNAL CABLING 2 4 CRT Monitor Cabling 2 4 IEEE 488 Cabling 2 4 External Trigger and Clock Cabling 2 4 Front to Rear Panel Connectors 2 4 Direct A D Output 2 4 TABLE TOP USE PPM 2 4 RACK LATCHES seeeeeeees 2 5 RACKMOUNTING 0 05065 2 5 PACKAGING FOR SHIPMENT 25 Section 3 OPERATING INSTRUCTIONS INITIAL INSTRUMENT SETUP 3 1 POWER ON OFF 20 022 cab bse r 3 1 Power Do 1i i EX se eae be 3 1 OPTION 19 ONLY Blank Front Panel ns s ee ed veto dant 3 2 Power OR ict ates eee LUE SEEN 3 2 SELE TEST iis oye Ve eed meae 3 2 ANITIALEZ AS ION noi es
231. triggering pulse is generated when the signal enters the window or when leaving the window depending upon whether ievel 1 is less than or greater than level 2 TRIGGER POINT J TRIGGER LEVEL 1 TRIGGER CEEVEL 2 TRIGGER POINT Fig 3 14 BI siope trigger Level 1 gt Level 2 TRIGGER POINT TRIGGER oZ OOOO LEVEL 2 TRIGGER LEVEL 1 N TRIGGER POINT 6387 26 Fig 3 15 BI siope trigger Level 2 Level 1 3 25 Operating Instructions To select Bi Slope and set the trigger levels 1 Select Bi using the TRIG SLOPE toggle key When selected both the and indicators will illuminate 2 Push the TRIG LEVEL 1 key Its current value will be displayed in the Trigger display if the key indicator is blink ing use the Parameter Entry Knob to set trigger ievel 1 which sets the level for a positive going signal 3 Push the TRIG LEVEL 2 key Its current value will be displayed in the Trigger display If the key indicator is blink ing use the Parameter Entry Knob to set trigger level 2 which sets the level for a negative going signal NOTE The trigger level can be set in either 6 of full scale or voltage With an internal trigger the of full scale or voltage value is set in 1 of input range steps With external trigger the trigger level is set in 6 or a volt age value in 1 of full scale for External Trigger in 5 V HYS SLOPE HYS slope provides a stable trigger pulse whe
232. ts indicator is 3 52 blinking and CURSOR 2 is displayed on the waveform the relative voltage measurement by CURSOR 1 and CURSOR 2 is enabled The voltage values are displayed on the Con trol display Fig 3 52 While reading the voltages move CURSOR 2 to the maximum peak voltage of the same waveform as CURSOR 1 Fig 3 52 7204 21 Fig 3 52 Amplitude measurement with CURSOR 1 and 2 In the last part of this exampie the frequency of the sta tionary waveform is measured 6 Press the CURSOR 2 key until its indicator is off which removes Cursor 2 from the screen Next press the CURSOR 1 key until the CH1 DISPLAY indicator is on Then use the Parameter Entry Knob to move CURSOR 1 as close to the midpoint of the waveform leading edge as pos sible while watching the voltage display Next press the CURSOR 2 key unti the CH1 DISPLAY indicator is on then move CURSOR 2 to the middle of the leading edge of the next cycle Adjust the cursors until the difference in their relative voltages is minimum If 1 T 1 AT is pressed at this point a measurement of the frequency of one cycle of wave form between CURSOR 1 and CURSOR 2 can be made Fig 3 53 RTD 710A instruction Manual Operating Instructions As can be seen from this example the RTD 710A per mits use of the cursors for various types of waveform mea surements lf the GPIB is used an even more detailed analysis can be made of waveform parameters using the s
233. ts until the acquisition is com pleted and enters the HOLd state H display location is O display off when PLOt command is received an execution error SRQ is issued if EXR is on During PLOt all front panel keys are locked except RQS ID key DCL or SDC aborts the plot Table 5 11 DEVICE TRIGGER GROUP Header Argument Link Argument l Description DT ON Enables the RTD 710A to respond to the GPIB GET command OFF DT Reports the status of the DT setting Example response DT OFF RTD 710A Instruction Manual l 5 19 Programming Command Set Header INIt 5 20 Argument ALL PANel WAV itm GPib DATa WINdow DEVice Table 5 12 INITIALIZATION GROUP Link Argument Description Executes all of the INIt command arguments PANel WAVfrm and GPlb The ALL argument is optional Resets all front panel controls to default settings See Section 3 Operating Instructions for default settings Clears the waveform memory to zero Clears the event buffer sets DT OFF sets Service Request Group commands to RQS ON OVER OFF WRI OFF CER ON EXR ON INR ON EXW ON OPC OFF USER ON and sets DATa WINdow and DEVice as shown in Table 5 12 1 Tabie 5 12 1 WiNdow AND DATa SETTINGS CHAnnet CH1 LOCatio 1 STArt Trigger Delay value of CH1 Location 1 COUnt Record Length value BSlze Record Length value not to exceed 16384 BFOrmat BiNary CHAnnel CH1 LOCation 1 STArt Trigger Delay value
234. umber to its nearest legal hardware value Table 5 1 NUMERIC FORMAT FOR LINK ARGUMENTS Numeric Argument Number Type Format Examples NR1 Integers d ee hg a lt NR2 gt Floating Point 3 2 5 1 1 2 NR3 Exponential 1 386E 2 1E 2 Notation 1E 2 1 02E 3 COMMAND DESCRIPTIONS Tables 5 2 through 5 15 which are arranged by func tional group list and describe the command set To aid in locating command descriptions an alphabetical jist of commands follows Table 5 15 RTD 710A Instruction Manual Header VMOde VMOde BWLim BWLim CH1 or CH2 Programming Command Set Table 5 2 VERTICAL SYSTEM CONTROL GROUP Argument Link Argument CH1 DUA ON OFF RANge lt NRx gt UNit PERcent VOLts OFFset lt NRx gt COUpling AC GND DC TVClamp RTD 710A Instruction Manual Description Selects the vertical input mode CH1 selects CH1 only DUAI selects both CH1 and CH2 A record Length of 256 K is incompatible with DUA mode Selecting DUA mode limits the record length to 128 K and a warning SRQ is issued if EXW is ON and 256 K is attempted DUAI mode and High speed sample mode are incompatible Selecting DUA forces sample mode to NORmal and the sample interval is set to 10 ns if 5 ns is attempted Aiso a warning SRQ is issued if EXW is on Record location number or auto advance location is limited to 128 K if vertical mode is set to DUAI and a warning SRQ is issued if EXW
235. used the waveform is expanded by that number of times X2 The VPOsn command is useful for positioning the zoomed X4 waveform X8 X16 X32 VZOom Reports the vertical scaling factor of the display Example response VZOOM X1 VPOsn lt NRx gt Sets the vertical zero offset for the displayed channel This is useful when using YZOom lt NRx gt 2048 to 2047 in steps of 1 If NRx is not within the limitation determined by vertical zoom rate NRx is truncated and limited to a legal value and a warning SRQ is issued if EXW is on l When queried the value is NR1 VPOsn Reports the vertical zero offset value for the displayed chan nel which is returned in lt NR1 gt format Example response VPOSN 0 Table 5 6 WAVEFORM PARAMETER MEASUREMENT GROUP Header Argument Link Argument Description MEASure VOLt ON Enables voltage measurement mode OFF TIMe ON Enables time measurement mode OFF FREquency ON Enables the 1 T or 1 AT measurement mode 1 T 1 AT and OFF external clock are incompatible If requested an error SRQ is issued if EXR is on If one cursor is on using the CURsor commands listed in Table 5 5 the measurements are made relative to zero volts and the trigger point If two cursors are on the measurements are made relative to the difference between cursor 1 and cur Sor 2 MEASure VOLt Reports status of the selected measurement mode TIMe FREquency MEASure Reports status of all the mea
236. ut cable must be fastened to the chassis of the user s instrument with screws for EMI shielding and to avoid any electrical damage to the RTD 710A It is recommended that whatever connector is used to interface to the distant end of the A D output cable that it be keyed to accommodate the existing connector key to prevent signal mismatching One type of matching connec tor is 3M part number 3331 0000 A D OUTPUT TERMINATION The signal outputs from the A D connector are ECL open emitter differential drive outputs which should be termi nated through 68 ohms to 2 Vdc Fig 4 5 shows one type of data receiver circuit that can be used to terminate the distant end of the A D output cable An ECL 10H116 line receiver and 10H176 latch shouid perform adequately in the circuit RTD 7104 Instruction Manual Interfacing PIN 1 PIN 2 GND LJ 1 aub DATA BIT 0 D10 D10 DATA BIT 0 LSB DATA BIT 1 D11 Dit DATA BIT 1 DATA BIT 2 D12 p12 DATA BIT 2 DATA BIT 3 O13 D13 DATA BIT 3 DATA BIT 4 D14 DH DATA BIT 4 DATA BITS D15 BS DATA BIT 5 DATA BIT 6 O16 Dp16 DATA BIT 6 DATA BIT 7 D17 D17 DATA BIT 7 DATA SIT 8 D18 D18 4 DATA BIT B DATA BIT 9 D19 D19 DATA BIT 9 MSB CH1 CLOCK CLX CLK1 CHI CLOCK GND 2Vdc DATA BIT 0 D20 D20 DATA BIT 0 LSB DATA BIT 1 D21 D21 DATA BIT 1 DATA BIT 2 D22 D22 DATA BIT 2 DATA BIT 3 O23 p23 DATA BI
237. uts waveforms vertical and time base settings and cursor measurement information Responds to HPGL A D OUTPUT INTERFACE 50 pin AMPMODU MT connector ECL compatible Differential data and clock signais have timing as i shown below SAMPLE INTERVAL pou 4 5 ns aoe AN OZ NC 7204 27 In high speed sampling mode CH1 and CH2 data and clocks are 180 degrees out of phase 100 MHz as determined by front panel settings Specifications Tabie B 2 cont Characteristic Performance Requirement Supplemental Information POWER SUPPLY INPUT Line Voltage Range 115 V Nominal 90 to 132 V ac 230 V Nominal 180 to 250 V ac Power Consumption Std instrument 320 watts Instrument With All Options 350 watts 700 VA Heat Dissipation Approx 1195 BTUs per hr Fuse Rating 115 V ac 8 A 250 V medium blow 230 V ac 4 A 250 V medium blow Tabie B 3 MECHANICAL SPECIFICATIONS Characteristic Description Standard Instrument Dimensions Height 194 mm 7 6 inches with feet 177 mm 7 0 inches without feet Width 443 mm 17 4 inches with carrying strap l 429 mm 16 9 inches without carrying strap Depth 643 mm 25 3 inches front of frame to rear feet inciusive Rack mount Instrument Dimensions Height 177 mm 7 0 inches without feet Width 482 mm 19 0 inches from rackmount handie to handle inclusive Depth 643 mm 25 3 inches from front of frame to rear feet inclusive Weight Net Approx 23 5 Kg 51 8 Ibs
238. ves envelope of up to last acquisition 2 All data valid Envelope count z 2 1 Same as Normal above 2 Same as Normal above Envelope count 1 Roll Mode 1 Data written in memory at point of HOLD 2 Records that haven t been written contain invalid data with value of 0 128K WORDS PEH CHANNEL DE d ties ind Be R E sad cm ea ect Operating instructions RECORDING Record Length and Location The RTD 710A contains a 256K word 10 bit word RAM 10 bit word waveform memory In the DUAL Vertical Mode each channel CH1 and CH2 is allocated 128K words while in CH1 ONLY Vertical Mode CH1 is allocated all 256K words Each allocation can be partitioned into equa lengths and used to provide areas for the recording of multi ple waveform data One record is a unit of memory used to record one piece of data Records are determined by the RECORD LENGTH and RECORD LOCATION settings RECORD LENGTH sets the length of a record The num ber of records that can be contained within an entire mem ory is determined by the length of the memory divided by the record length Record lengths of 1K 2K 4K 8K 16K 32K 64K 128K and 256K can be designated To seiect one of these values carefully consider the duration of the input sig nal sampling interval etc For example when a 16K RECORD LENGTH is selected there are eight 8 records available per channe 128K words 16K words per reco
239. want to acquire another waveform In the AVE rageENV elope record mode data is ac quired and displayed the number of times set by the Aver age or Envelope values then the Hold status is set If the Envelope value is set to 99999 no limit envelope process ing continues until the RESET HOLD key is pushed or the HOLd RESet command is received over the GPIB In the ADV ance record mode data is sequentially ac quired from the first record to the record specified by the RECORD LOCATION function For example if RECORD LOCATION is set to 20 and auto ADV ance is enabled 20 trigger events are acquired To increase thruput set the CH1 and CH2 displays to zero 0 COMP IN COMP OUT This trigger mode operates simi lar to the NORM mode except the acquired data is com pared with a reference to determine if another acquisition is to be made The reference data must be envelope waveform data while the acquired data may be either envelope or nor mal waveform data The COMP Trigger modes allow adjustment of a live sig nal into defined limits of an enveloped reference waveform it also is an effective means of observing and measuring infrequent signal abnormalities 3 27 Operating Instructions In COMP IN if all data acquired from the trigger point falls within the maximum and minimum reference vaiues the acquired data is saved and the Hold status is set otherwise the acquisition comparison process repeats Fig 3 20 In
240. wn in Fig 6 2 should be displayed Fig 6 2 Composite video display 9 Press the FIELD LINE key and when its indicator blinks use the Parameter Entry Knob to set the Trigger dis play value to 263 To ciosely investigate the waveform in the area of the horizontal sync pulse press the SAMPLE IN TERVAL key and use the Parameter Entry Knob to set the sample interval to 2 us Fig 6 3 Fig 6 3 Horizontal sync pulse display RTD 710A Instruction Manual 10 Check that a vertical sync signal exists behind the present horizontal sync pulse Press the TRIG DELAY key time position and use the Parameter Entry Knob to set the trigger delay to about 100 us Fig 6 4 6397 70 Fig 6 4 Vertical sync pulse display using trigger delay RTD 710A instruction Manual Options 6 5 Senet Appendix A SRQ STATUS BYTES AND EVENT CODES INTRODUCTION Status bytes and event codes are used to report an instrument s operating status to a system controller which is heipful in program development and troubleshooting RTD 710A status responses to a controller are divided into two categories Status Bytes and Event Codes Sta tus Bytes indicate general instrument conditions while Event Codes indicate specific instrument conditions For ex ample if the controller sent the message VMODE CH11 to the RTD 710A the instrument would set its SRQ line true indicating some type of error had occurred At that time
241. y through the EXT TRIG IN connector on the front panel Since the external trigger full scale signal range is 5 V the voltage display levels for that trigger differ from that of the internal trigger Trigger Slope and Level The Trigger SLOPE of the RTD 710A can be set to five different settings Bl HYS Hysteresis and RTD 710A Instruction Manual 2 When switching the clock source be Operating Instructions HYS and are those normally found on oscillo scopes but Bl HYS and HYS are types of triggers more suited for single shot transient signals Bl or for sig nals with high noise levels HYS The RTD 710A has two trigger levels TRIG LEVEL 1 and 2 when BI HYS or HYS is selected TRIG LEVEL 1 sets the triggering level for the positive going portion of the waveform when using Bl HYS and HYS SLOPE TRIG LEVEL 2 sets the triggering level or the trigger resetting level for the negative going portion of the waveform in the BI HYS and HYS SLOPE When the trigger levels are set a wave form window is formed between the two levels Whichever level is the most positive starts the window while the less positive level ends the window This is shown in more detail in later figures B Slope The BI siope trigger is useful when digitizing a single shot input signal of unknown nature When selected a trigger window is formed between TRIG LEVEL 1 and 2 Figs 3 14 and 3 15 A
242. yte is read Table A 2 RTD 710A EVENT CODES vL EEEX HI RU EVENT CODE INSTRUMENT STATUS cities NN e NENA M n IH AA RR AeA rere Command Error CER ON SRQ Status 97 or 113 101 Command header error 102 Header delimiter error 103 Command argument error 104 Argument delimiter error 105 i Nonnumeric argument 106 Missing argument 107 invalid message unit delimiter 108 Checksum error 109 Byte count error 151 Symbol or number too long Command is ignored DONNE MPP AN NC SRA AS a CE C A 2 RTD 7104 Instruction Manual SRQ Status Bytes and Event Codes Tabie A 2 cont Event Code instrument Status Execution Error EXR ON SRQ Status 98 or 114 201 Command not executable in LOCAL 203 1 0 Buffers full output dumped 206 Group Execute Trigger GET ignored 250 CH2 not available in high speed sampling mode 251 TV trigger option not installed 252 Trigger source CH2 Blsiope HYS and HYS not available with TV trigger coupling Lines FLD1 or FLD2 i 254 CH2 trigger Source not available in high speed sampling mode 255 Selected recall memory is empty 256 XY display mode not allowed when two waveforms are not displayed or in CH1 only vertical mode 258 Target channel for Cursor is not displayed 260 1 T or 1 4 Measure modes not available with external clock source 262 Breakpoint requested to be cle

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