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Tektronix 73A-270 User Manual

1. 2 Oscilloscope Probe 250 MHz 10X 10 MQ 12 7 pF ktronix P6130 Checking pulse pattern signal timing amplitude and phase 3 Counter Timer 10 MHz frequency measurement ktronix 73A 541 Checking pulse burst accuracy 4 External Clock Source 25 MHz ktronix VX4790A Checking external clock 5 50 Q BNC Coaxial Cable 50 Q impedance BNC male connec ktronix part number Interconnecting electrica two required tors 2 0057 01 signals 6 SMB to BNC Adapter Cable 50 Q impedance SMB male BNC ktronix VX1729 Interconnecting electrica female connectors signals 7 BNC Female to BNC Fe 50 Q impedance Female to BNC Tektronix part number Interconnecting electrica male barrel Female 103 0028 00 signals 8 BNC Male to Dual Binding 50 Q impedance BNC male Dual Tektronix part number Interconnecting electrica Post Binding Post connectors 103 0035 00 signals 9 DB 25 front panel intercon Male DB 25 Connector with 6 inch DB 25 Tektronix part Interconnecting electrica nect assembly jumper wires 26 AWG soldered to number 131 0570 00 signals pins 4 amp 5 56 73A 270 Arbitrary Pulse Pattern Generator Module Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification 73A 270 Under Test Configuration In order to perform this verification procedure the 73A 270 under test must be installed in an approved VXIbus system At a minimum the system must contain the
2. This event is generated by this module in response to any command sent to the data low register other than the following Byte Available Byte Request Begin Normal Operation Clear Read Protocol Trigger Identify Commander Request True 151413 12111098 76543210 11111 L 0 I lt Logical Address gt This event is generated as programmed by the I command or in response to a memory busy overwrite error AAA AAA A A A A 73A 270 50 APPENDIX A Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com APPENDIX B FRONT PANEL INPUT OUTPUT CONNECTIONS The signals listed below are available on a DB25S connector When seen from the front Pin l is on the bottom right and Pin 14 is on the bottom left Six of the signals Pulse Pattern Out A and B Bipolar Out A and B and External Trigger A and B are also available on the front panel BNC connections labeled TTL OUT A and B BPLR OUT A and B and EXT TRG A and B A description of each of the signals follows the pinout listing DB25S Pin No Function l External Trigger A TTL active low 2 Transmission In Progress A TTL active high 3 Transmission In Progress A TTL active low 5 External Clock In 7 Bipolar Out A 9 Bipolar Out B 11 Transmission In Progress B TTL active low 12 Transmission In Progress B TTL active high 13 External Trigger B TTL active low 14 Pulse Pattern Out A TTL active high 15 Pulse Pattern Out A
3. A rtisan Artisan Technology Group is your source for quality Technology Group new and certified used pre owned equipment FAST SHIPPING AND SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT DELIVERY Experienced engineers and technicians on staff Sell your excess underutilized and idle used equipment TENS OF THOUSANDS OF at our full service in house repair center We also offer credit for buy backs and trade ins IN STOCK ITEMS www artisantg com WeBuyEquipment 7 EQUIPMENT DEMOS HUNDREDS OF InstraV ea REMOTE INSPECTION LOOKING FOR MORE INFORMATION MANUFACTURERS Remotely inspect equipment before purchasing with Visit us on the web at www artisantg com 7 for more our interactive website at www instraview com 7 information on price quotations drivers technical LEASING MONTHLY specifications manuals and documentation RENTALS ITAR CERTIFIED CEP BAD tia Contact us 888 88 SOURCE sales artisantg com www artisantg com User Manual Tektronix Y 73A 270 Arbitrary Pulse Pattern Generator Module 070 9148 03 This document supports firmware version 1 00 and above Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to the Safety Summary prior to performing service ce Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Copyright O
4. Do Not Operate With If you suspect there is damage to this product have it inspected by qualified Suspected Failures service personnel 73A 270 Arbitrary Pulse Pattern Generator Module iii Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com General Safety Summary Safety Terms and Symbols Terms in This Manual These terms may appear in this manual WARNING Warning statements identify conditions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product Symbols on the Product The following symbols may appear on the product A A m DANGER Protective Ground ATTENTION Double High Voltage Earth Terminal Refer to Manual Insulated Certifications and Compliances Overvoltage Category Overvoltage categories are defined as follows CAT III Distribution level mains fixed installation CAT II Local level mains appliances portable equipment CAT I Signal level special equipment or parts of equipment telecommunica tion electronics iv 73A 270
5. 88 SOURCE www artisantg com A rtisan Artisan Technology Group is your source for quality Technology Group new and certified used pre owned equipment FAST SHIPPING AND SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT DELIVERY Experienced engineers and technicians on staff Sell your excess underutilized and idle used equipment TENS OF THOUSANDS OF at our full service in house repair center We also offer credit for buy backs and trade ins IN STOCK ITEMS www artisantg com WeBuyEquipment 7 EQUIPMENT DEMOS HUNDREDS OF InstraV ea REMOTE INSPECTION LOOKING FOR MORE INFORMATION MANUFACTURERS Remotely inspect equipment before purchasing with Visit us on the web at www artisantg com 7 for more our interactive website at www instraview com 7 information on price quotations drivers technical LEASING MONTHLY specifications manuals and documentation RENTALS ITAR CERTIFIED CEP BAD tia Contact us 888 88 SOURCE sales artisantg com www artisantg com
6. connections or the DB25S External Trigger A and B TTL active low connector pins are used to input external TTL trigger signals When Channel A or B is programmed for anexternal trigger and the front panel external trigger has been selected by the X command transmission will start three to four clock cycles 400 ns maximum using the internal clock 400 ns maximum using the internal clock following a high to low transition of the channels external trigger input on cither the BNC or DB255 pin Internal 10K pull up resistors pull each input high when not connected St Connector Input Output Signals Sl is a 25 pin DB25S connector which provides several additional Input Output signals Additional signals provided at the DB25S front connector are gt an external clock input so that several modules may be programmed for parallel operation gt a buffered internal clock brought to the front connector of the APPG Module allowing any module to be the common clock source for a parallel module outputconfiguration gt each channel provides a TTL level output to the module s front connector indicating transmission is in progress This signal when indicating that transmission is not in progress may be used to indicate the need for another trigger to continue transmission Both TTL active high and TTL active low polarities of the signal are provided for both channels 73A 270 52 APPENDIX B Artisan Technol
7. 6 microsecond duration value on Channel B If an external clock of 3 MHz is supplied and the command string OSOR is sent the resolution for Channel A will be 1 5 10 or 200 nanoseconds 73A 270 37 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command S Select Syntax zS Purpose The S command selects Channel A or Channel B as the active channel for subsequent commands Description z is the 1 digit decimal integer 0 or that selects the channel Z Channel Selected 0 Channel A l Channel B An S command can be sent while a transmission is in progress without affecting transmission operations Examples The command string OS selects Channel A as the active channel for subsequent commands that affect only the active channel paa 73A 270 38 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command Syntax Purpose Description Example T TTLTRG ZZ T The T command connects or disconnects the pulse pattern output for channels A and B to or from any of the eight VXIbus backplane TTLTRG lines TTLTRGO through TTLTRG7 z and z are 1 digit decimal integers from 0 to 8 that specify the connections of Channel A z and Channel B z output to the VXIbus TTLTRG lines as follows Connects to TTLTRG Line hune IN e uU N O nN 5 6 7 7 8 Disconnect
8. 73A 151 is depressed Also note that when the Halt Switch is in the OFF position the module is not in strict compliance with the VXIbus Specification The module can now be inserted into any slot of the chassis other than slot 0 4 This module does not connect to the VXIbus local bus so no front panel keying is required NOTE Cable Installation If the DB25S connections are to be used use either a 73A 734 Data Cable or 73A 782P Hooded Connector to interface between the DB25S output connector and the UUT If the module is being installed in a CDS 73A Series card cage route the cable from the front panel of the module down through the cable tray at the bottom of the card cage and out the rear of the card cage No calibration is required for this module 73A 270 15 INSTALLATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com INSTALLATION CHECKLIST Installation parameters may vary depending on the card cage being used Be sure to consult the card cage Operating Manual before installing and operating the 73A 270 Module Revision Level Serial No Card Cage Slot Number Switch Settings VXIbus Logical Address Switch Interrupt Level Switch Halt Switch Fast External Clock Slow External Clock Cable Installed Performed by Date a a 73A 270 16 INSTALLATION Artisan Technology Group Quality Instrumentation Guaranteed 88
9. APPG or all modules can be driven by a single external clock source The six digit data loaded into each memory location represents the duration time of the output the length of time the output will remain active or inactive for that point in the data list A separate two digit decimal counter is provided for each channei to allow transmission of the data list from 1 to 63 times Each location in memory can be identified as an active or inactive output Any location in the memory can be identified as the last address to provide a variable length data list Anv number of locations in the memory can be identified as breakpoints for pausing and then continuing transmission Like other CDS products the APPG Module combines ease of use and flexibility of function in its programmable features These features include gt four output modes per channel Retriggerable and Non Retriggerable Modes each with internal or external triggering gt breakpoint capability provided in all four modes at any location in the list gt interrupts can be programmed to generate an interrupt to the VXIbus backplane when transmission is complete or at breakpoints gt four time resolutions ranges 100 nsec psec 10 usec or 100 psec gt initial polarity of transmission may be programmed so that a transition from the inactive state will occur either immediately on triggering or 73A 270 DESCRIPTION Artisan
10. Channel B external trigger to TTLTRG2 OS selects Channel A 3R programs Channel A for 100 usec resolution 2M programs Channel A for non retriggerable internal trigger mode DA reset Channel A data list address to address 0 3600000L programs first data list as 360000 100 psec durations or 36 seconds at an inactive level I5L programs second data list duration as a 100 usec active duration will drive TTLTRG2 active low and as the last data list value Ic programs Channel A for a repeat count of 1 IS selects Channel B OR programs Channel B for 100 nanosecond resolution 3M programs Channel B for non retriggerable external trigger mode OA resets address counter IIL programs first Channel B data list value as 100 nanosecond active level 94L programs the second Channel B data list value as a 900 nanosecond inactive level and as the last data list value 0c programs Channel B for continuous transmission 1B triggers Channel A to start its delayed pulse program and arms Channel B for the external trigger to be gencrated by Channel A When this command is sent the XMTA TBOA TBIA and EXTB LEDs will light Exactly 36 seconds later the XMTA LED will go out and the XMTB will light continuously At this time an oscilloscope on the TTL OUT B BNC may be used to observe a TTL signal with a one microsecond period and a high TTL pulse width of 100 nanoseconds i 73A 270 40 OPERATION Artisan Technology Group Quality Instrumenta
11. ER 7 a m a 180 A e gt MONA e LOGICA ADDRESS BIPOLAR QUE A P A ala I l a EXTIRIGA He I a CLO dH E mare o e Pr Evtl SELECT i AS E a E ameg jo it E a FAST EXTERNA ua i a B he 0 IN FUSE Av FUSE O 10 E 4 q a Figure 270 1 73A 270 Controls and Indicators 73A 270 3 DESCRIPTION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com The following controls and indicators are provided to select and display the functions of the 73A 270 Module s operating environment See Figure 270 1 for their physical locations e Switches Logical Address Switches Each function module in a sees VXIbus System must be lt b lt b assigned a unique logical amp address from to 255 decimal The base VMEbus address of the 73A 270 is set to a value between 1 and FFh 255d by two hexadecimal rotary switches Align the desired switch position with the arrow on the module shield LOGICAL ADDRESS The actual physical address of the 73A 270 Module is on a 64 byte boundary If the switch representing the most significant digit MSD of the logical address is set to position X and the switch representing the least significant digit LSD of the logical address is set to position Y then the base physical address of the 73A 270 will be 64d XYh 49152d For example L S Base Physicai O__ Adar d A 64 10 49152 49
12. Hz 5 000 5 Hz 2 x 100 us 2 499 75 Hz 2 500 25 Hz 85 8585 ms 20 ns 85 85848 ms 85 85852 ms 42 4242 ms 20 ns Burst Pattern 42 x 1100 us 42 42418 ms 42 42422 ms 21 x 1100 us BPLR OUT A Checks Minimum Measured Value voltage amp phase Maximum Voltage 2V 260 mV 1 740 V 2 260 V Opposite Phase with TTL OUT 8 7V 260mV 7 780V 8 260 V votage aveo iov OO ES FT Opposite Phase with TTL OUT 8 7V 260mvV j 7mov 8 260 V Triggering amp Breakpoint for Channel A Failed Tigger Lins a TTLTRG1 TTLTRG2 TTLTRG3 TTLTRG 4 TTLTRG5 TTLTRG6 TTLTRG7 EXTTRGA Breakpoint 73A 270 Arbitrary Pulse Pattern Generator Module Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com 59 Appendix D Performance Verification 73A 270 Test Record Cont Triggering Breakpoint for Channel B Passed Failed Trigger Lines TTLTRGO TTLTRG1 TTLTRG 2 TTLTRG 3 TTLTRG 4 TTLTRG5 TTLTRG6 TTLTRG7 EXTTRGA Breakpoint External Clock amp Transmission In Progress Passed Failed External Clock Transmission In Progress FAST EXT CLK SLOW EXT CLK Transmit in P rog ress A Transmit in P rog ress B 60 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com 73A 270 Arbitrary Pulse Pat
13. SOURCE www artisantg com Appendix D Performance Verification e Set the 73A 270 to divide the 1 MHz external clock source by 10 10 us resolution and to set the pulse duration multiplier to 10 to generate a square wave with a 200 us period 5 kHz with the following steps SET VX270 IBWRT OS1ROAOM101L104LOC0OB Verify 5 kHz waveform f Momentarily disconnect the SMB connector from the VX4790A and check that the 5 kHz pulse pattern is no longer present on TTL OUT A 2 Verify the Slow External Clock input with the following steps a Turn the mainframe power off and remove the 73A 270 Return the FAST EXTERNAL CLOCK switch to the C1 position and change the SLOW EXTERNAL CLOCK switch to the ON external position Replace the 73A 270 and turn the mainframe power on Reconnect the coaxial cable to the TTL OUT A and the Arbitrary Waveform Generator clock source to pins 5 and 4 GND of S1 b Program the 73A 270 to select the 200 kHz external clock and to set its pulse duration multiplier to 20 to generate a 5 kHz square wave IBWRT OSOROAOM201L204L0COB c Set the clock source to provide a 200 kHz square wave SET VX4790 IBWRT SETSQUARE 0 2 5 200000 10 T Verify 5 kHz The fourth parameter is numeric one followed by alphabetic O d Momentarily disconnect the SMB connector from the VX4790A and check that the 5 kHz pulse pattern is no longer present on TTL OUT A e Using the oscilloscope probe verify a 10 MH
14. TTL active low 17 External Clock Out 24 Pulse Pattern Out B TTL active low 25 Pulse Pattern Out B TTL active high 4 6 10 16 18 23 Digital Ground 8 19 20 21 22 Analog Ground Signal changes are clocked for a high to low transition of the Externa Clock In or Out signal Pulse Pattern Outputs Pulse pattern outputs for Channel A and B are provided at the TTL OUT A and B front panel BNCs and on the DB25S Pulse Pattern Out A and B TTL active high and Pulse Pattern Out A and B TTL active low connector pins The front panel BNCs and the DB25S Pulse Pattern Out TTL active high outputs are TTL high for an active pulse pattern level The DB25S Pulse Pattern Out TTL active low outputs are TTL low for an active pulse pattern level Analog Bipolar Pulse Pattern Outputs Analog bipolar pulse pattern outputs for Channel A and Bare provided at the BPLR OUT A and B front panel BNCs and on the DB25S Bipolar Out A and B connector pins The signal level for both the BNC and DB25S connections when the module is not transmitting or is transmitting at an inactive level will be as programmed by the N command The signal level when the module is transmitting and an active level is programmed will be as programmed by the P command 73A 270 APPENDIX B Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com External Trigger Inputs The EXT TRG A and EXT TRG B BNC
15. TTLTRG3 IBWRT Q38X83T IBWRT 1B TTLTRG4 IBWRT Q48X84T IBWRT 1B TTLTRG5 IBWRT Q58X85T IBWRT 1B 73A 270 Arbitrary Pulse Pattern Generator Module Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification Table A 6 Cont VXIbus TTL Trigger Line Verification Ch A triggered by Ch B TTLTRG Line Change Setup Restart Pattern Verify 500 kHz Pulse Pattern TTLTRG6 IBWRT Q68X86T IBWRT 1B TTLTRG7 IBWRT Q78X87T IBWRT 1B 4 Using the following commands disable both channels from the TTLTRGX lines and then resend the trigger pulse from channel B to restart the pulse pattern from channel A Check that channel A is not putting out a pulse pattern and then stop the pulse pattern IBWRT Q88X88T IBWRT 1B Verify no pulse pattern from channel A IBWRT Q 5 Verify the EXT TRG A input with the following steps a Connect TTL OUT B to EXT TRG A b Restart both channels with the following command IBWRT 1B c Verify a 500 kHz pulse pattern from channel A triggered by channel B and then stop the pattern IBWRT Q Verify that the pattern stopped d Disconnect TTL OUT B from EXT TRG A 6 Verify channel A breakpoint recognition with the following steps a Set the 73A 270 to generate a continuous pulse pattern having a 10 ms active high level pulse with an active breakpoint followed by a 10 ms active
16. Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com after one or more durations of output gt repeat count can be programmed to repeat from 1 to 63 times or indefinitely gt capability to drive any of the eight VXIbus TTLTRG backplane lines gt external triggering external trigger source may be selected under program control to be any of the eight VXIbus TTLTRG lines gt bipolar analog output programmable over the full 17 4V output range for both the active and inactive states The card is programmed with simple ASCII character strings consisting of numerical data combined with single letter commands The 73A 270 supports the VXI fast handshake mode and handles all characters on a Direct Memory Access DMA basis VXIbus handshake time is less than 500 nanoseconds per character Front panel BNC connectors are provided for TTL Pulse Pattern Outputs Analog Bipolar Pulse Pattern Outputs and External Trigger Inputs A 25 pin DB25S connector on the front panel provides duplicates of the above BNC signals plus additional Input Output signals for an external clock input a buffered internal clock and a transmission in progress signal See Appendix B for a complete description of these signals e 5 5 5 5 1 5 5 5 5 5 5 AA 73A 270 2 DESCRIPTION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com L
17. active and inactive states is programmable over the full voltage output range The outputs for each channel are 50 ohm sources capable of driving a 50 ohm toad to 8 7V de with a 100 mV resolution or a high impedance load to 17 4V de witha 200 mV resolution e Front Panel BNC Connectors TTL Pulse Pattern Outputs The TTL OUT A and TTL OUT B BNC connections provide the programmed active and inactive output pulse trains for each channel The TTL compatible outputs for each channel are at a TTL high when an active level is programmed Analog Bipolar Pulse Pattern Outputs The BPLR OUT A and BPLR OUT B BNC connections provide analog output signals The signal level when the module is not transmitting or transmitting at an inactive level will be the voltage level programmed by the N command The signal level when the module is transmitting and at an active level will be the voltage level programmed by the P command External Trigger Inputs The EXT TRG A and EXT TRG B BNC connections are used to input front panel external triggers When Channel A or B is programmed for an external trigger and the front panel external trigger has been selected by the X command transmission will start three to four clock cycles 400 ns maximum using the internal clock following a high to low transition of the channel s external trigger input Internal 10K pull up resistors pull each input high when not connected DB25S Signals Additional s
18. end of the subroutine is delineated with a RETURN statement When the subroutine reaches the RETURN statement execution will resume on the line following the GOSUB command GOTO n Program branches to line n EX GOTO 320 directs execution to continue at line 320 IF THEN Sets up a conditional IF THEN statement Used with other commands such as PRINT or GOTO so that IF the stated condition is met THEN the command following is effective EX IF I 3 THEN GOTO 450 will continue operation at line 450 when the value of variable l is 3 REM All characters following the REM command are not executed REM statements are used for documentationand user instructions EX REM CLOSE ISOLATION RELAYS RETURN Ends a subroutine and returns operation to the line after the last executed GOSUB command lt CR gt Carriage Return character decimal 13 lt LF gt Line Feed character decimal 10 e Programming Examples In BASIC The following sample BASIC programs show how commands for the 73A 270 might be used These examples assume that the 73A 270 has logical address 24 and is installed in a VXIbus card cage that is controlled through an IEEE 488 interface from an external system controller such as an IBM PC or equivalent using a Capital Equipment Corp IEEE 488 interface The VXIbus IEEE 488 interface is assumed to have an IEEE 488 primary address of decimal 21 and to have converted the 73A 270 Module s logical ad
19. format Data transfer bus DTB slave A16 D16 only Switch selectable levels highest priority through 7 lowest D16 lower 8 bits returned arc the logical address of the module Upper 8 bits contain the Y XIbus protocol event code Active for internal clock and for recommended external clock switch settings for external clock All VXIbus commands are accepted e g DTACK will be returned The following commands have effect on this module all other commands will cause an Unrecognized Command Event BYTE AVAILABLE with or without END bit set BYTE REQUEST BEGIN NORMAL OPERATION CLEAR IDENTIFY COMMANDER READ PROTOCOL TRIGGER VXIbus events are returned via VME interrupts The following events are supported and returned to the 73A 270 Modules commander UNRECOGNIZED VxXIbus COMMAND REQUEST TRUE In IEEE 488 systems such as the 73A IBX this interrupt will cause a Service Request SRQ to be generated on the IEEE 488 bus ID Device Type 73A 270 11 SPECIFICATIONS Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Power Requirements Voltage Current Peak Module Toy Current Dynamic Module Ibm Cooling Fuses Temperature Humidity VXIbus Radiated Emissions VXIbus Conducted Emissions Status Control Protocol Response Data Low See Appendix A for definition of register contents All required de p
20. from EXT TRG B 9 Verify channel B breakpoint recognition with the following steps 73A 270 Arbitrary Pulse Pattern Generator Module 71 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification 72 a Program TTL OUT B to generate a continuous pulse pattern having a 10 ms active high level pulse with an active breakpoint followed by a 10 ms active low level pulse with an active breakpoint with the following steps IBWRT 1S3ROA0M1003L1006L0C IBWRT OB b Check that TTL OUT B is held at a TTL high level which demonstrates that the pattern stopped at the active high pulse breakpoint c Restart the pulse pattern several times and check each time that the TTL OUT B signal level alternates between a TTL low level and a TTL high level as the breakpoints are being recognized IBWRT OB IBWRT OB IBWRT Q Verify that the pulse pattern stopped 73A 270 Arbitrary Pulse Pattern Generator Module Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification External Clock and This sequence verifies the high and low speed external clock inputs and the Transmission In Progress Transmission In Progress signal inputs on the front panel DB 25 connector Equipment Requirements Oscilloscope item 1 Oscilloscope Probe item 2 50 Q BNC Coaxial Cable two re
21. from all TTLTRG lines The T command has no effect on connections to the front panel BNC or DB25S 25 pin connector pulse pattern outputs they are always connected On power up or reset a value of 8 is programmed disconnecting the pulse pattern output from all TTLTRG lines Both channels may be connected to the same TTLTRG line Since the V XIbus TTLTRG lines are open collector the line will be driven low if either channel is programmed for an active polarity level by the L command The TTLTRG line is driven low when an active pulse pattern output level is programmed to achieve this wired OR capability made possible by the open collector signals The pulse pattern output may also be connected to the same TTLTRG line as the external trigger see the X command of the opposite channel to use one channel to trigger another This command programs both Channel A and Channel B independent of the active channel programmed by the S Select command The command string 28T82X0S3R2M0A 3600000L 15L1CISOR3MOAIIL94L0CIB programs Channel A for connection to VXI bus TTLTRG2 and Channel B for no connection to the TTLTRG lines It also programs a delayed 100 psec 73A 270 39 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com pulse on Channel A that is used to trigger a continuous waveform on Channel B 36 seconds later 28T connects Channel A to TTLTRG2 82X connects
22. generate a trigger command to all addressed devices However a BEGIN NORMAL OPERATIONS command is generated bv the Y XI bus resource manager and has no external source VXI Events Events are passed from a servant to a commander They may be generated by the servant either in response toa command for example Unrecognized Command event or due to a condition detected in the module internal error VXI Message Based Instrument An intelligent instrument that implements the defined VXIbus registers and at a minimum the Word Serial Protocol All CDS VXIbus devices are message based VX1 Word Serial Protocol The simplest required communication protocol supported bv Message Based devices in a VXIbus system It utilizes the Al6 communications registers to transfer data using a simple polling handshake method All CDS VXIbus devices implement the Word Serial protocol 388 V Nibus Interface An EEE 488 to VXIbus Interface Device is a message based device which provides communication between the IEEE 488 bus and V XI bus instruments T3A a7 pom way APPENDIX C Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com AA A eS Appendix D Performance Verification This procedure verifies the performance of the 73A 270 Arbitrary Pulse Pattern Generator It may be performed in your current VXIbus system if it meets the requirements described in Table A 2 A
23. high impedance may be calculated as follows Output Level 2 Programmed Voltage Value R R 50 where R is the load On power up the module is programmed to an active output level of 0 volts dc l 67P programs an active level of 6 7 into a 50 ohm load or 13 4 into an open load 2 09P programs an active level of 900 millivolts into a 50 ohm load or 1 800 volts into an open load 3 To determine the programmed voltage value needed to achieve a 12 volt output into a 300 ohm load use the above equation as follows Programmed Voltage Value Output Level R 50 2R or PVV 12 300 50 7 volts 2 300 The command 70P will achieve the desired level output of 12V fora 300 ohm load 73A 270 35 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command Q Quit Syntax zQ Purpose The Q command stops transmission of one or both channels Description zis a 1 digit decimal integer 0 or 1 that specifies the following Zz Action 0 Stop transmission on the last selected channel l Stop transmission in both channels simultaneously Examples The command string 0S0Q stops transmission on Channel A but not on Channel B The command string ISOQ stops transmission on Channel B but not on Channel A The command string OSIQ or IS1Q stops transmission on both channels within 20 nanoseconds of cach other m aaa aI 73A 270
24. line initiates transmission three to four 100 nanosecond clock cycles 400 ns maximum using the internal clock following a high to low transition on the trigger line regardless of the resolution programmed for the channel Operation with Retriggerable mode Internal Triggering The B Begin command starts transmission Transmission will continue for the specified number of repeat times If a B command is issued during transmission transmission will immediately restart at the RS 73A 270 32 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Examples beginning of the data list The repeat count will not be changed Transmission will continue until the end of the data list has been sent the specified number of repeat times Operation with Retriggerable mode External Triggering The B command arms the external trigger When received the external trigger starts transmission Transmission will continue for the specified number of repeat times An external trigger issued during transmission will immediately restart transmission at the beginning of the data list unless the channel is halted ata breakpoint The repeat count will not be changed Transmission will continue until the end of the data list has been sent the specified number of repeat times An additional B command is then required to rearm the external trigger If breakpoints have been programmed an exte
25. low level pulse with an active breakpoint with the following commands IBWRT OS3ROAOM1003L1006L0C b Trigger the pulse pattern and check that the TTL OUT A pulse pattern is held at a TTL high level confirming that the pattern stopped at the active high pulse breakpoint 73A 270 Arbitrary Pulse Pattern Generator Module 69 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification IBWRT OB Verify a TTL high level Retrigger the pulse pattern several times and check after each start that the TTL OUT A signal level alternates between a TTL low level and a TTL high level IBWRT OB Verify a TTL low level IBWRT OB Verify a TTL high level IBWRT Q Verify that the pulse pattern stops 7 Verify channel B operation with the VXIbus TTL Trigger Lines with the following steps a Move the oscilloscope CH 2 coaxial cable from TTL OUT A to TTL OUT B Reset the 73A 270 for channel B to generate a 500 kHz pulse pattern triggered by an external trigger from TTLTRGO and for channel A to provide the trigger pulse on TTLTRGO IBWRT 80X08T IBWRT OS3ROAOM51L54L1C IBWRT 1S1ROA1M11L14L0C IBWRT 1B Verify a 500 kHz signal and then stop the pulse patter IBWRT Q Verify that the pulse pattern stopped Check the remaining TTLTRG1 through TTLTRG7 lines by sending the commands in table A 7 and verifying the 500 kHz pu
26. nett ented 4 OWCE sara di pend a o E E asta ad dates gene anes Sh grace 4 FUSES sui id Leeds A AO RA eRe Awesome EAS 5 LEDS ori er ad sivas bees eee A isis ees 6 BITE Built In Test Equipment 0 eect UIRE EREA 6 COSSA serrat tar es 7 o A og 8 Installation Installation Requirements and Cautions ooooocccccccoccncccn eens 14 Installation ProCS US coso ci canna dade et a a dhe ae Deno twine aes 15 Installation GheCKIISE ooo ri a ee ie ee het Bae eed 16 Operation NT A A ON 17 Programming Sequence occcccccccc nett eens 17 Programmable Features eraren sisira dake ii a eee een A 18 Front Panel BNC Connectors 00 cc ete eens 19 POWSFUD ropero Radin ee dont ee apes be eee Ol Ee ee ei Eee 20 System Commands coco 20 Module Commands 20 SUMMALY aanse nanne si bade bb edad oA es 21 Command Descriptions eeuna ecrane eaa 22 SYSFAIL Self Test and Initialization 0 0 0 cee teen teen eens 41 Programming ExampleS 0 ce naia a Aa E a DEE aa DEET DEE a DEEE eens 41 Definition of BASIC Commands 0occcccccc arrra aranna 41 Programming Examples in BASIC oooccccccccooccc nnana 42 Appendices Appendix A VXIbus Operation ooocccccccocccccn 46 Appendix B Front Panel Input Output Connections ooooccccccccccncc 51 Appendix C VXIbus Glossary ooococccoccoccc eet t ete eens 53 Appendix D Performance Verification 0 0 cece nett nes 55 Appendix E User Ser
27. oscilloscope probe check that Transmission In Progress B active high pin 12 of S1 2nd down from top right is a TTL low level and that Transmission In Progress B active low pin 11 3rd down from top right is a TTL high level IBWRT Q Verify no pattern and pin 12 is high and pin 11 is low g Restart the 500 Hz pulse pattern and check that pin 12 of S1 is now a TTL high level and that pin 11 is a TTL low level IBWRT 1C0B Verify pin 12 is high and pin 11 is low This completes the 73A 270 verification procedure 73A 270 Arbitrary Pulse Pattern Generator Module 75 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification 76 73A 270 Arbitrary Pulse Pattern Generator Module Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix E User Service This appendix contains service related information that covers the following topics m Preventive maintenance m User replaceable Parts Preventive Maintenance You should perform inspection and cleaning as preventive maintenance Preventive main tenance when done regularly may prevent malfunction and enhance reliability inspect and clean the module as often as conditions require by following these steps 1 Turn off power and remove the module from the VXlbus mainframe 2 Remove loose dust on the outside of the instrument wi
28. yes yes no no no no ves yes yes yes Memory Busy Overwrite Interrupt no no no no no no no no yes ves yes yes yes yes yes yes To check all possible causes of an interrupt an input request must be performed for both channels A and B Reading the data clears the above two interrupt bits XMIT Complete and Memory Busy Overwrite Interrupt for the selected channel In response to an Input Request to the 73A 270 Module the character string 02 lt CR gt lt LF gt might be returned For the selected channel A or B this response indicates that transmission is not in progress that an interrupt has been generated due to transmission completion or a breakpoint that the memory is not busy and that a Memory Busy Overwrite Interrupt has not been generated 73A 270 27 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command I Interrupt Syntax z Purpose The I command enables or disables the XMIT Complete interrupt capability for the selected channel Description z isa l digit decimal integer 0 or 1 that specifies z Action 0 Disables the XMIT Complete interrupt capability for the selected channel l Enables the XMIT Complete interrupt capability for the selected channel Interrupts indicate that a channel has completed transmission or that a breakpoint has occurred If an interrupt occurs a VXIbus Request True even
29. 00 locations is present on the pulse pattern output 73A 270 DESCRIPTION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com SPECIFICATIONS Number of Channels Type Outputs Bipolar Outputs TTL Outputs Number of Sequentini Output Durations Number of Repeat Times Time Period of Each Output Duration Programmable Resolution of Each Output Duration Significant Digits Time Period Programming Trigger Modes Non retriggerable Mode Retriggerable Mode Two TTL active high and active low VXIbus TTLTRG bipolar analog each channel Programmable level 17 4 volts 8 7 into 50 ohms Transition time lt 70 nsec 10 to 90 points typical Drive capability 3 2 mA source 24 mA sink current l to 1600 per channel l to 63 or continuous Programmable to 999 999 times the resolution range selecied for each channel Resolution Range Time Period Duration 100 ns 100 nanoseconds to 99 9999 milliseconds l us l microsecond to 0 999999 seconds 10 microseconds to 9 99999 seconds 100 microseconds to 99 9999 seconds Internal 10 MHz Clock Four programmabie resolution ranges 100 nanosecond usec 10 psec and 100 psec resolution External Clock 1 f 10 f 100 f 1000 f f external clock input frequency 6 decimal digits 20 bit resolution Single trigger for total number of output cycles without
30. 000L15L1C1S 20N 52P3M0AIR11L194L8C1B05 See the Note below 70 CALL SEND ADDR270 WRT STATUS 80 RDS SPACES 4 90 CALL ENTER RD LENGTH ADDR270 STATUS Read the status of Channe A to see if transmission ever completed 100 XMT VAL RD 110 IF XMT 2 INT XMT 2 gt 5 THEN GOTO 80 Check to see if the status response is an odd number indicating that transmission is still active 120 PRINT 250 MILLISECOND UPDATE INPUT MISSED Print a message to the console if a 250 millisecond update was missed Channel A completed transmission 130 END NOTE Explanation of Line 60 78T87X TTLTRG7 is used to trigger Channel B if Channel A puts outa pulse on TTLTRG 7 OSIM Channel A is selected and programmed for retriggerable operation with an external trigger 0A The address counter is reset 3R25000L15L A 100 psec pulse following a 250 millisecond delay is programmed for Channel A If an external trigger occurs on the Channel A External Trigger BNC within 250 milliseconds the retriggerable operation will start the 250 millisecond delay again without outputting the 100 usec trigger pulse to Channel B IC Channel A is programmed for a repeat count of 1S 20N 52P3M Channel B is programmed for a 2 0V inactive bipolar output level and a 5 2V active bipolar output level and is programmed for external trigger mode to activate the VXIbus TTLTRG trigger input 0A The address counter is reset IR A l psec resolution is p
31. 270 to generate the pulse pattern List 42 times and to begin 73A 270 Arbitrary Pulse Pattern Generator Module 65 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification SET VX270 IBWRT 42C0B e Stop the counter timer acquisition read one response and verify a return count of 42 events SET VX541 IBWRT QM IBRD 100 Observe return count of 42 events f Repeat the burst test sending the data list 21 times IBWRT JM SET VX270 IBWRT 21C0B SET VX541 IBWRT QM IBRD 100 Observe return count of 21 events 6 This completes the TTL OUT signal test sequence If you have not checked both channels of the 73A 270 repeat the sequence for the other channel BPLROUTAandB This sequence verifies the output voltage levels polarity and phase for the BPLR OUT A and BPLR OUT B signals Complete all steps in this section for BPLR OUT A and then repeat all steps for BPLR OUT B Equipment Requirements Oscilloscope item 1 Counter Timer item 3 50 Q BNC Coaxial Cable two required item 5 Prerequisites All prerequisites listed on page 56 All previous Performance Verification Sequences 1 Connect the BPLR OUT A or BPLR OUT B to Ch 1 of the oscilloscope 50 Q input impedance 2 Connect the TTL OUT A or TTL OUT B of the 73A 270 under test to Ch 2 of the oscilloscope 1 MQ input impedance 66 73A 270 Arbitrary Pulse Pa
32. 270 with the VXIbus TTL Breakpoint Function trigger lines 8 internal and external triggering and breakpoint recognition 73A 270 Arbitrary Pulse Pattern Generator Module 67 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification 68 Equipment Requirements Oscilloscope item 1 Counter Timer item 3 50 Q BNC Coaxial Cable two required item 5 Prerequisites All prerequisites listed on page 56 All previous Performance Verification Tests 1 Connect TTL OUT A to Ch 2 of the oscilloscope 1 MQ input impedance 2 To verify Ch A operation with the VXIbus TTL trigger lines Set the 73A 270 for Ch A to generate a 500 kHz pulse pattern triggered by an external trigger from TTLTRGO and for Ch B to provide the trigger pulse on TTLTRGO Verify a 500 kHz pulse pattern and then stop the pattern SET VX270 IBWRT 08X80T IBWRT 1S3ROAOM51L54L1C IBWRT OS1ROA1M11L14L0C IBWRT 1B Observe 500 kHz IBWRT Q Verify that the pulse pattern stopped Check the remaining TTLTRG1 through TTLTRG7 lines by sending the commands in table A 6 and verifying a 500 kHz pulse pattern Table A 6 VXlbus TTL Trigger Line Verification Ch A triggered by Ch B TTLTRG Line Change Setup Restart Pattern Verify 500 kHz Pulse Pattern TTLTRG1 IBWRT 18X81T IBWRT 1B Verify 500 kHz pulse pattern TTLTRG2 IBWRT Q28X82T IBWRT 1B
33. 36 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command Syntax Purpose Description Examples R Resolution zR The R command specifies the time resolution range which will be used by the APPG Module for the selected channel z is a l digit decimal integer 0 1 2 or 3 that specifies the following resolution ranges Z Internal 10 MHz Clock External Clock 0 100 nanosecond 1 f second l microsecond 10 f second 2 10 microsecond 100 f second 3 100 microsecond 1000 f second f frequency of external clock The R command programs the time increment multiplier for the selected channel This multiplier is a time quantity equal to its associated resolution range That is for the 100 nanosecond resolution range the channel programs in 100 nanosecond increments For the microsecond resolution range the channel programs in microsecond increments and so on If an R command is sent to the module during transmission and the command is different from that presently programmed for the channel the resolution multiplier for the channel will immediately change to correspond to the new programmed value l M The command string OSORISIR programs Channel A for 100 nanosecond resolution and Channel B for microsecond resolution Programming a duration value of 6 with the L command will create a 600 nanosecond duration value on Channel A and a
34. 792d 6 64 21 49162 50496d L A Logical Address MSD Most Significant Digit LSD Least Significant Digit TEEE 488 Address Using the 73A 270 Module in an IEEE 488 environment requires knowing the module s IEEE 488 address in order to program it Different manufacturers of IEEE 488 interface devices may have different algorithms for equating a logical address with an EEE 488 address If the 73A 270 is being used in a CDS IEEE 488 IAC system consult the operating manual of the CDS 73A 151 RM 488 Interface Module If the 73A 270 is not being used in a CDS IAC System consult the operating manual of the IEEE 488 interface device being used for recommendations on setting the logical address VMEbus Interrupt Level Select Switch Each function module in a a VXIbus System can generate TE an interrupt on the VMEbus AR to request service from the interrupt handler located on its commander for example the 73A 151 RM IEEE 488 Interface Module in a CDS 73A IBX System The VMEbus interrupt level on which the 73A 270 Module generates interrupts is set by a BCD rotary switch Align the desired switch position with the arrow on the module shield Valid Interrupt Level Select switch settings are l through 7 with setting 1 equivalent to level 1 etc The level chosen should be the same as the level set on the 73A 270 s interrupt handler typically the module s commander Setting the switch to an invalid interr
35. 8 88 SOURCE www artisantg com OPERATION The 73A 270 Module is programmed by ASCH characters issued from the system controller to the 73A 270 Module via the modules VXIbus commander and the VXIbus card cage backplane The module isa VXIbus Message Based Instrument and communicates using VXIbus Word Serial Protocol Refer to the manual for the VXIbus device that will be the 73A 270 Module s commander for details on the operation of that device If the Module is being used in a CDS 73A IBX System card cage the module s commander will be the 73A 151 Resource Manager IEEE 488 Interface Module Refer to the 73A 151 Operating Manual and the programming examples at the end of this section for information on how the system controller communicates with the 73A 151 The module consists of two completely separate arbitrary pulse pattern generators with a common VXIbus backplane interface Each channel contains a 1600 word by six decimal digit high speed memory This memory is used to store up to 1600 six digit output duration time values The six digit data loaded into each memory location represents the length of time the output will remain active or inactive for that point in the data list A separate two digit decimal counter is provided for each channel to allow transmission of the data list from I to 63 times Separate circuitry is provided for each channel to allow channel specific selection of resolution start of tra
36. Arbitrary Pulse Pattern Generator Module Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com 73A 270 ARBITRARY PULSE PATTERN GENERATOR DESCRIPTION The 73A 270 Arbitrary Pulse Pattern Generator APPG Module is a printed circuit board assembly for use in a card cage conforming to the VXIbus Specification such as the 73A 021 used in the CDS 73A IAC System The module provides two completely independent output channels with a common VXIbus backplane interface Each channel can be individually programmed to generate an arbitrary string of active and inactive TTL or bipolar analog 17 4V pulse or pattern outputs Each channel contains a 1600 word by six decimal digit high speed memory This memory is used to store up to 1600 6 digit output duration time values Since the APPG allows programming of 1600 duration values not just 1600 1 s and 0 s very complex pulse trains may be programmed After initial programming these duration values may be updated in progress while the APPG is transmitting The APPG s ability to output short pulses repeatedly or short pulses delayed by long intervals make it ideal for triggering other VXIbus instruments using either front panel connectors or the VXIbus backplane TTLTRG bus for signal routing And in applications requiring synchronous operation between multiple VXIbus mainframes multiple APPG modules may be driven by a single
37. Count command OADE 73A 270 30 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com INACTIVE INACTIVE PASS 1 18 usec Total i PASS 2 18 usec Total i Figure 270 2 Sample Waveform TTL BNC Output The above waveform would be output from Channel A as a result of the command 0S1RA20L41L50L11L65L2COB 0S IR A 20L 41L 50L 11L 65L 2C OB Selects Channel A Selects 1 microsecond resolution Selects memory address 0 Sets first data duration for 2 psec inactive Sets second data duration for 4 psec active Sets third data duration for 5 psec inactive Sets fourth data duration for 1 psec active Sets fifth data duration for 6 usec active and specifies it as last duration in the list Specifies repeat of the data output two times Starts transmission on the selected channel Channel A 73A 270 31 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command Syntax Purpose Description M Mode zM The M command specifies either the Retriggerable or Non Retriggerable modes for the selected channel Italso enables or disables external triggering z is a 1 digit decimal integer that specifies the following Mode Triggering Retriggerable Internal Retriggerable External Non Retriggerable Internal Non Retriggerable External Mn ON The difference between the Retri
38. NT LEVEL Also If an embedded controller is being used follow the operating manual for displaying the state of the interrupt lines IBWRT 1163C0B IBRD 100 Observe 02 response 4 Check for VXIbus Request True event by performing a serial poll and verify that the response byte is 0x40 decimal 64 i e DIO7 1 IBRSP Observe 40 response TTLOUTAandB This sequence verifies the time base resolution the pulse duration multiplier and the burst mode for the TTL OUT A and B signals Complete all steps in this section for TTL OUT A and then repeat all steps for TTL OUT B Equipment Oscilloscope item 1 Requirements q Counter Timer item 3 50 Q BNC Coaxial Cable item 5 Prerequisites All prerequisites listed on page 56 All previous Performance Verification Tests 1 Connect the TTL OUT A or TTL OUT B output to Ch 1 of the oscillo scope 2 V div 1 ms div 1 MQ input impedance 2 Verify the time base resolution with the following steps a Select the channel to be tested IBWRT OS or IBWRT 1S Select TTL OUT A or TTL OUT B b Set the 73A 270 for a 100 ns resolution and then to the beginning of the address space for the first List entry to have a of 100 ns active high duration for the second List entry to have a 100 ns active low duration and to be designated as the Last Address to transmit the list continuous ly and finally to begin transmission of the last channel selected Verify a pu
39. Pattern output not programmed Interrupt Capability Disabled both channels Pulse Pattern Memory Contents Undefined Channel A amp B Repeat Count Undefined LEDs Extinguished except for Power LED Pulse Pattern Outputs Inactive Transmission In Progress Outputs Transmission not in progress Bipolar Outputs OV de for both Active and Inactive levels Data Commands 1 8 Mbytes per second fast handshake mode Throughput will be affected by system controller and system controller V XIbus interface Normal Mode Word Serial transfer or Fast Handshake Word Serial mode Switch selectable through 254 Ammim A 73A 270 10 SPECIFICATIONS Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com VXIbus Compatibility VXI Device Type VXI Protocol VXI Card Size Module Specific Commands VMEbus Interface Interrupt Level Interrupt Acknowledge VXIbus Fast Handshake VXIbus Commands Supported V XIbus Protocol Events Supported VXIbus Registers Fully compatible with the VXIbus Specification for message based instruments with the Halt Switch in the ON position VXI message based instrument VXIbus Revision 1 2 Word serial C size one slot wide All module specific commands and data are sent via the VXIbus Byte Available command All module specific commands are made up of ASCII characters Module specific data may be in either ASCII or binary
40. Tektronix Inc All rights reserved Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Printed in the U S A Tektronix Inc P O Box 1000 Wilsonville OR 97070 1000 TEKTRONIX and TEK are registered trademarks of Tektronix Inc Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three 3 years from the date of shipment If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all
41. User Manual for additional information If you are using a different controller simply substitute the equivalent commands 73A 270 Arbitrary Pulse Pattern Generator Module 55 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification Prerequisites The test sequences in this procedure are a valid verification of the 73A 270 when the following requirements are met m The 73A 270 has been calibrated within the last 12 months m The 73A 270 module covers are in place and the module is installed in an approved VXIbus mainframe according to the procedure in Section 2 of the Operating Manual m The 73A 270 has passed its power on self test m The 73A 270 is operating in an ambient environment as specified in Section 1 of the Operating Manual and has been operating for a warm up period of at least 10 minutes Equipment Required This procedure uses traceable signal sources and measurement instruments Table A 1 lists the required equipment You may use equipment other than the recommended examples if it meets the minimum requirements listed Table A 1 Required Test Equipment Item Number and Description Minimum Requirements Example Purpose 1 Digitizing Oscilloscope 300 MHz bandwidth 50 Q input Tektronix TDS 460 Checking pulse pattern signal impedance lt 1 5 DC vertical timing amplitude and phase accuracy
42. ake Transfer Mode Read of the 73A 270 Module proceeds as follows I The commander writes the Byte Request command ODEFFh to the 73A 270 s Data Low register m The commander reads the 73A 270 s Data Low register A Fast Handshake Transfer Mode Write to the 73A 270 Module proceeds as follows a a SS SS SS 73A 270 APPENDIX A Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com The commander writes the Byte Available command which contains the data OBCXX or OBDXX depending on the state of the End bit to the 73A 270 s Data Low register The 73A 270 Module has no registers beyond those defined for VXIbus Message Based devices All communications with the module are through the Data Low register the Response register or the VXIbus interrupt cycle Any attempt by another module to read or write to any undefined location of the 73A 270 s address space may cause incorrect operation of the module CAUTION If the user s card cage has other manufacturer s computer boards operating in the role of VXIbus foreign devices the assertion of BERR as defined by the VXIbus Specification may cause operating problems on these boards REGISTER DEFINITIONS As with all VXIbus devices the 73A 270 Module has registers located within a 64 byte block in the A16 address space The base address of the 73A 270 device s registers is determined by the device s uni
43. artisantg com Appendix D Performance Verification Table A 5 Pulse Duration Multiplier Verification Multiplier Verify Period and Command to Send Resolution Duty Cycle IBWRT OAOR10001L10004L0COB 1000 100ns 5kHz 0 5 Hz 50 step 3 repeated for table continuity 0 1 IBWRT 1ROA1001L1004L0COB 100 lus 5 kHz 0 5 Hz 50 0 1 IBWRT 2ROA101L104L0COB 10 10 us 5 kHz 0 5 Hz 50 0 1 IBWRT 3ROA11L14L0COB 1 100 us 5kHz 0 5 Hz 50 0 1 IBWRT 0A21L24L 2 100 us 2 5 kHz 0 25 Hz 50 IBWRT OROA8585851L4242424L0COB 858585 high 85 8585 ms 20 ns 424242 low 42 4242 ms 20 ns 5 Verify the pulse pattern burst count function with the following steps a d Connect the TTL OUT A or TTL OUT B to the counter timer INPUT B input Set the 73A 270 for a 10 us resolution to first address location to retriggerable mode for a first List entry of 550 us active high and for a second list entry of 550 us active low and designated as the Last Address IBWRT Q IBWRT 2ROAOM551L554L Set the counter timer for Basic Timer Counter Measurement Mode to Function Event Count B for a Ch B Trigger at 1 V to Gate Indefinitely and to return an Integer Format of maximum 2 7 1 value IBFIND VX541 IBWRT ER Query for any pending ERROR conditions IBRD 100 Observe a 99 response no ERRORs IBWRT MMO FN4 BT 100 BZ1 G1 1F17 IBWRT JM Start the counter timer measurement cycle Set the 73A
44. bit until it becomes true 2 The commander writes the Byte Request command to the 73A 270 s Data Low register QDEFFh 3 The commander reads the 73A 270 s Response register and checks 1f the Read Ready bit ts true If it is the commander proceeds to the next step If not the commander continues to poll the Read Ready bit until it becomes true 4 The commander reads the 73A 270 s Data Low register A Normal Transfer mode Write to the 73A 270 Module proceeds as follows l The commander reads the 73A 270 s Response register and checks if the Write Ready bit is true If it is the commander proceeds to the next step If not the commander continues to poll the Write Ready bit until it becomes true 2 The commander writes the Byte Available command to the 73A 270 s Data Low register OBCXX or OBDXX depending on the End bit The module also supports the Fast Handshake mode during some commands In this mode the module is guaranteed to return DTACK within the 20 microsecond window defined by the VXIbus Specification If the internal 10 MHz clock is used the 73A 270 will return DTACK within 550 nanoscconds For non normal use where a slow external clock is used with the Clock switches set for fast external clock the 73A 270 Module asserts BERR to switch from Fast Handshake mode to Normal Transfer mode The 73A 270 s Read Ready and Write Ready bits react properly during Fast Handshake A Fast Handsh
45. ceived during transmission Breakpoint Capability A breakpoint capability is provided in all four modes at any location in the list Transmission stops following any level programmed with a breakpoint and resumes when an additional trigger is received The external trigger modes may be triggered by a TTL signal on each channel cither through the VXIbus TTLTRG lines through a front panel BNC or DB25S connector or by the VXIbus TRIGGER command Interrupts The APPG Module can be programmed to generate an interrupt to the VXIbus backplane when transmission is complete or at breakpoints to indicate the need for a trigger to continue transmission Time Duration Ranges The 6 digit output time duration values for each channel may be programmed using 100 nanosecond increments up to 100 milliseconds usec increments up to second 10 psec increments up to 10 seconds or 100 psec increments up to 100 seconds Other resolutions may be obtained by using an external clock available through the front panel DB25S connector The module uses the VXIbus slot 0 10 MHz ECL clock for its internal time base In applications requiring synchronous operation between multiple VXIbus mainframes multiple APPG modules may be driven by a single APPG or all modules can be driven by a single external clock source Initial Polarity The initial polarity of transmission active or inactive level may be programmed so that a trans
46. data updates when the data being transmitted on the pulse pattern output has several successive 100 nanosecond duration values To update in progress requires a free 100 nanosecond cycle when the memory is not being accessed by the transmitter a duration value of 200 nanoseconds or more is transmitted If an L command is issued while memory is busy previous data sent by an L command will be overwritten Memory Overwrite Interrupt A B A value of indicates that an interrupt has been generated in the selected channel as a result of issuing an L command while memory is busy Proper operation of the 73A 270 Module requires checking the memory busy status if more than ten consecutive 100 nanosecond durations have been previously programmed and are being transmitted Generation of this interrupt indicates improper use of the module and an error condition The Memory Overwrite Interrupt can not be disabled by the I command 73A 270 26 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Example The state of the four bits indicated by return of the values 00 through 15 is as follows 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 XMIT in Progress no yes no yes no yes no yes no yes no yes no yes no yes XMIT Comp Memory Interrupt no no yes yes no no yes yes no no yes yes no no yes yes Busy no no no no yes yes
47. dress to an IEEE 488 primary address of decimal 24 73A 270 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Example The following program causes the 73A 270 to output a 2 psec pulse 4 psec after trigger followed 10 usec later by a ten millisecond 10 000 usec pulse The signal is output on Channel A and is repeated continuously The module is programmed for rctriggerable operation with internal triggering Lines 10 through 40 initialize the PC s IEEE 488 interface card as a system controller with an IEEE 488 address of decimal 21 Line 50 assigns the decimal IEEE 488 address of the 73A 270 to the variable ADDR270 10 DEF SEG amp HC400 Defines memory location of IBM PC IEEE 488 Interface Module 20 SEND 9 INIT 0 ENTER 21 Initialize PROM offsets for IBM PC IEEE 488 Interface Module 30 PC ADDRESS 21 CONTROL 0 Define IEEE 488 Interface Module s IEEE 488 address and define it to be a controller 40 CALL INIT PC ADDRESS CONTROL 50 ADDR270 24 Define 73A 270 s IEEE 488 address 60 WRTS 0SOCOA1IROM40L21L100L100005L0B OS selects Channel A OC programs continuous output 0A resets the data list address pointer and IR programs psec resolution The following four L commands program a 4 usec inactive level a 2 psec active level a 10 psec inactive level and a 10 millisecond active level output The 5 in the 100005L identifies t
48. e dependent 11 1111 1411 Not used 3 Extended l Not used 2 Passed l Always passed 1 0 Device dependent 11 Not used Control 15 A24 32 Enable loro No effect 14 2 Device dependent 111 1111 1111 11 Not used l SYSFAIL Inhibit l Disables module from driving Sysfail 0 Enables module to drive Sysfail 0 Reset Reset 0 Not reset Protocol 15 CMDR Servant only 14 Signal Reg l No Signal Reg 13 Master l Slave only 12 Interrupter l Interrupter 11 FHS 0 Fast Handshake capability 10 Shared Memory l No Shared Memory capability 9 4 Reserved jl 1111 Not used 3 0 Device dependent 1111 Not used Response 15 Defined valucof 0 0 Per VXI 14 Reserved Per VXI 13 DOR l Not used 12 DIR l Not used ll ERR l Not used 10 Read Ready loro Indicates that the instrument portion of the module has data available to be read Set by the instrument following a Byte Request command and cleared on a read from the Data Low register or on reset AAA A 73A 270 48 APPENDIX A Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com BIT DEFINITIONS continued Register Bit Location Bit Usage 73A 270 Value 73A 270 Usage Response cont d 9 Write Ready lor 0 Cleared upon receipt of a Byte Available command Set when the instrument is ready to receive a data byte or on reset 8 FHS Active 0 FHS active FHS inactive 7 Locked 1 Not used 6 0 Device dependent 111 1111 Not used Data High not i
49. e reset bit in the module s Control Register is set to one 1 bv the module s commander While in this state a device is inactive interrupts which are pending are unasserted 2il pending bus requests are unasserted and any onboard processor is haited The device s VMEbus slave interface iS active in this state however the device is incapable of responding to any commands other than RESET and SYSFAIL INHIBIT In the case of a CDS 73A IBX Card Cage for example a module soft reset occurs when the card cage s 73A 151 Resource Manager IEEE 488 Interface Module receives a STOP command over the EEE 488 bus that is addressed to the 734 270 The 73A 270 does not reset fora Soft Reset unless the Halt switch is ON When reset the 3A 270 becomes inactive clears all pending interrupts and resets its operation to the power up state The 3A 270 does not generate VMEbus bus requests and does not have an on board processor SYSFAILL INHIBIT VXI Bit in the Control register or the module When set toa one 1 by the VXIbus Resource Manager the device is disabled from driving the SYSFAIL line CDS modules are designed so that the Sysfail Inhibit bit will work under ail conditions except when the 3V power is lost Commands These are commands passed from a commander to a servant within the VXIbus environment A command may or may not be prompted bv an external event For example an TEEE 488 GROUP EXECUTE TRIGGER will
50. elements listed in Table A 2 Table A 2 Elements of a Minimum 73A 270 Under Test System Item Number and Description Minimum Requirements Example Purpose 1 VXlbus Mainframe Two available slots for 73A 270 Tektronix VX1410 VX1400A Provides power cooling and and 73A 541 in addition to the backplane for VXIbus modules Slot 0 controller 2 Slot 0 Controller Resource Mgr Slot 0 Device GPIB VXI Provides Slot 0 functions Functions IEEE 488 GPIB Inter Resource Mgr and GPIB face VXlbus interface 3 VXIbus System Controller VXIbus Talker Listener Controller IBM 486 with National Instru Controlling the VXIbus ments GPIB PC2A card amp System NI 488 2M software and GPIB cable Tektronix part number 012 0991 00 Test System Configuration Table A 3 describes the VXIbus system configuration which is assumed in this procedure If your configuration is different you do not need to change it just note that you will observe your device names and addresses in the test sequence Table A 3 Test System Configuration VXIbus Logical Device GPIB Device Name VXI Slot Address GPIBO GPIBO PC card NA SLOTO SLOTO Slot 0 1 73A 270 VX270 Slot 1 2 73A 541 VX541 Slot 2 3 VX4790A VX4790 Slot 3 4 Test Record Photocopy the Test Record and use it to record the performance verification results for your module 73A 270 Arbitrary Pulse Pattern Generator Module 57 Artisan Technology Group Quality Instrum
51. ent 10 MHz TTL active high and TTL active low Channel A and B Transmission In Progress Outputs TTL active high and TTL active low 73A 270 9 SPECIFICATIONS Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Drive Capability Pulse Pattern Output Sense Transmission In Progress Output sense Bipolar Analog Outputs Power Up Conditions VXIbus Data Rate Handshake Types Logical Address TTL 5 mA source 32 mA sink current BNC output TTL high when active VXIBus TTLTRG output TTL low when active DB25S TTL active high output TTL high when active DB25S TTL active low output TTL low when active TTL active high output TTL high for transmission in progress TTL active low output TTL low for transmission in progress Levels 50 ohm load Inactive level 8 7V dc Active level 8 7V dc Levels high impedance load Inactive level 17 4V dc Active level 17 4V de Minimum load 50 ohms Resolution 100 mV with 50 ohm load 200 mV with high impedance DC accuracy 3 of full scale range 10 90 rise fall time less than 60 nanoseconds When power is applied the module will go to the following known states Channel A Selected Resolution 100 nanosecond both channels Mode Retriggerable both channels External Trigger Disabled both channels External Trigger Source Front panel both channels VXIbus TTLTRG Pulse
52. entation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification 73A 270 Test Record 73A 270 Serial Number Date of Last Calibration Certificate Number VXIbus Interface Checks Table Command Response Temperature and Relative Humidity Verification P erformed by Date of Verification Logical Address IEEE Address Slot No MFG Model etc 1stResponse 2nd Response 3rd Response 4th Response 5th Response Passed Failed Program Command Response TTL OUT A Checks Time Base Resolution Pulse Duration Multiplier Burst Pattern TTL OUT B Checks Time Base Resolution 1 MHz Pattern Interrupt SRQ Measured Value Maximum 110 ns 100 ns 10 ns 90 ns 100 us 10 ns 85 8585 ms 20 ns 85 85848 ms 8585852ms es CC R maws SSS xno Ce IO ETT 1 01 us 10 01 us 100 01 us 5 000 5 Hz 5 000 5 Hz 5 000 5 Hz 1 us 10ns 99 ns 1 01 us 10 us 10 ns 9 99 us 10 01 us 100 us 10 ns 99 99 us 100 01 us 58 73A 270 Arbitrary Pulse Pattern Generator Module Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification 73A 270 Test Record Cont TTL OUT B Checks Minimum Measured Value Maximum Pulse Duration Multiplier 1000 x 100 ns 4 999 5 Hz 5 000 5 Hz 100 x 1 us 4 999 5 Hz 5 000 5 Hz 10 x10 ps 4 999 5 Hz 5 000 5 Hz 1x 100 us 4 999 5
53. er the B command starts or arms transmission With internal triggering the B command starts transmission With external triggering the B command is an ARM command for the external trigger The command string 0SOMOBISIMOB initiates transmission in Channel A then arms transmission in Channel B OS select Channel A OM enable internal trigger and retriggerable mode OB begin transmission IS select Channel B IM enable external trigger and retriggerable mode OB arm transmission for an external trigger ne re 73A 270 24 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command Syntax Purpose Description Example C Count zC The C command specifies the number of times to transmit the entire data list in memory associated with the selected channel zisa l or 2 digit decimal integer from O to 63 that specifies the number of times to transmit the data list The value O specifies that the data list is to be transmitted continuously The repeat count value can not be changed during operation The last programmed repeat count is reloaded automatically by the module at the completion of transmission It does not need to be reprogrammed for each transmission The repeat count is undefined after reset or at power up A C command is required for each channel for predictable operation following a reset or power up The command string OSOCIS20C specifies t
54. ers so input and output data transfers are unaffected Current module functional operation is also unaffected TRIGGER The module triggers operation if the external trigger mode is programmed and the VXIbus TRIGGER command has been programmed as the source for the external trigger BEGIN NORMAL OPERATION A OO na 73A 270 20 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com READ PROTOCOL The module will return its protocol to its commander A summary of the 73A 270 s Module s commands is listed below This is followed by detailed descriptions of each of the commands A sample BASIC program using these commands is shown at the end of this section Command protocol and syntax for the 73A 270 Module are as follows 1 2 3 The format for each command is specified in the detailed command description section of this manual Commands may be strung together indefinitely Carriage return lt CR gt line feed lt LF gt or other separation characters such as slashes periods commas colons or semi colons are permitted but not required between commands Leaving out lt CR gt lt LF gt will usually significantly reduce a system controller s execution time However adding a lt CR gt lt LF gt following commands improves readability Summary An overview of the commands in the order they typically would be programmed is as
55. ess will be set to address 0 The A command strobes the address specified by z into the memory address register of the selected channel An A command can be sent while a transmission is in progress The command will not affect the transmission nor will the transmission affect the contents of the address register Two independent address registers one for programming the other for transmission permit re programming without affecting transmission Since the A command doesn t require reloading of the complete data list any time duration value in memory can be changed by programming the appropriate address with the A command and updating the time duration value with the L command If Channel B has been selected as the active channel using the S command then the command string 44A programs Channel B memory address register to decimal value 44 73A 270 23 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command Syntax Purpose Description Example B Begin zB The B command either initiates or arms transmission for the selected channel or for both channels zis a l digit decimal integer 0 or 1 that specifies the following z Action 0 Begin or arm transmission for the channel last selected with anS command l Begin or arm transmission for both channels simultaneously The type of triggering selected by the M command determines wheth
56. follows S Select selects the channel A or B for which all following commands except the T and X commands will apply Resolution specifies one of four time resolution ranges for the selected channel Address specifies any of the 1 600 addresses in the selected channel for loading data into memory List specifies the time duration and polarity active or inactive of the output at the selected address for the selected channel It can also specify the selected address as a breakpoint or last address The programmed address will increment automatically at the end of each LIST command Count specifies the number of times the entire data list will be transmitted before stopping for the selected channel Mode specifies either the Triggerable or the Non retriggerable Mode for the selected channel It also enables or disables the external triggering for both modes TTLTRG specifies VXIbus TTLTRGO through TTLTRG7 for connection to Channel A and B s pulse pattern output or specifies no connection External Trigger specifies the source for an external trigger for Channel A and B as a VXIbus TTLTRGO through TTLTRG7 b the VXIbus TRIGGER command or 73A 270 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com c the front panel BNC connector or the equivalent DB25S connector pin N Inactive Analog specifies the analog bipo
57. ggerable modes and the Non Retriggerable modes is that in the Non Retriggerable modes B Begin commands or external triggers during transmission are ignored For the Retriggerable modes Bcommands or external triggers during transmission will immediately restart transmission at the beginning of the list unless the channel is halted ata breakpoint If the module is stopped ata breakpoint in any mode a trigger will cause the module to exit the breakpointstate and start transmission of the next segment of the data list In this case the trigger will not restart transmission at the beginning of the list If the data list has breakpoints in it but is not paused atone of those breakpoints when a retriggerable trigger occurs transmission will restartat the beginning of the data list regardless of what segment of the list is transmitting If the module is retriggered to restart transmission at the beginning of the list the repeat count will not be reset or decremented but will remain at 1ts present value The difference between internal and external triggering is that with internal triggering transmission in a channel will begin immediately when a B command is issued With external triggering the B command becomes an arming command only An external trigger at the front panel on a VXIbus TTLTRG line or a VXIbus TRIGGER command as programmed by the X command then starts transmission An external trigger at the front panel or on a VXIbus TTLTRG
58. hange of polarity or change in breakpoint status or last address status of the data presently being transmitted If the new data duration is less than the duration time already elapsed the module will transition to the next data duration immediately NOTE For the special case of having several successive duration outputs programmed to 100 nanoseconds in progress updating cannot always be done without error If several in progress updates are attempted in this situation the data may be overwritten and lost A status capability which indicates whether the memory is busy iS provided for these applications sce Input Request An in progress update should not be attempted when the memory is busy The memory will not be accessible until the next time duration of 200 nanoseconds or more A Memory Busy Overwrite interrupt will be generated if an in progress data update occurs while memory is busy The command string 0SIRA20L41L50L11L65L programs the first output level of Channel A to a 2 psec inactive output followed by a 4 psec active output followed by a 5 psec inactive ou put followed by a l psec and 6 psec active output The 6 psec output is also specified as the last output in the list for Channel A The IR characters preceding the L command specify a l usec resolution for Channel A The data is therefore in increments of 1 psec Figure 270 2 illustrates the output resulting from this command when programmed to repeat twice using the C
59. hat Channel A is to repeat its data list continuously and Channel B is to repeat its data list 20 times 73A 270 25 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Input Request Response Syntax Purpose Description z lt CR gt lt LF gt An Input Request to the 73A 270 returns status information for the last selected channel An input request is nota command output It is generated by reading inputting from the module The syntax shown is the syntax of the returned data z is a 2 digit decimal number from 00 to 15 encoding four status bits The four bits returned are 1 2 3 4 Transmit In Progress A B Indicates the transmission status A value of l indicates that the selected channel is transmitting This bit will be zero during a breakpoint or following completion of transmission This bit also reflects the state of the XMIT ACTIVE A or XMIT ACTIVE B output on the DB25S connector and the XMT A or XMT B LED on the front panel Transmit Complete Interrupt A B Indicates the status of the Transmit Complete Interrupt A value of indicates that a transmission is complete and an interrupt pending if the interrupt has been enabled by the I command This bit may be used to determine the source of an interrupt Memory Busy A value of indicates that the data list memory is busy This bit is significant when trying to do in progrcss
60. he 10 millisecond duration as both active and the last item in the list OB starts transmission on Channel A 70 CALL SEND ADDR270 WRTS STATUS 380 END Connecting an oscilloscope to the TTL OUT A BNC will display the described waveform An active level isa TTL high Example 2 This example programs the Channel B bipolar output to put outa steady state 2V signal as long asa TTL active low pulse occurs on the Channel A External Trigger BNC input at least every 250 milliseconds If a pulse is missed a series of eight psec pulses of 5 2V are output on the Channel B output with 19 psec gaps between the pulses The bipolar output is terminated with a 50 Ohm load Lines 10 through 40 initialize the PC s IEEE 488 interface card as a system controller with an IEEE 488 address of decimal 21 Line 50 assigns the decimal JEEE 488 address of the 73A 270 to the variable ADDR270 10 DEF SEG amp HC400 Defines memory location of IBM PC IEEE 488 Interface Module 20 SEND 9 INIT 0 ENTER 2 Initialize PROM offsets for IBM PC IEEE 488 Interface Module i i a a a 73A 270 44 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com 30 PC ADDRESS 21 CONTROL 0 Define IEEE 488 Interface Module s IEEE 488 address and define it to be a controller 40 CALL INIT PC ADDRESS CONTROL 50 ADDR270 24 Define 73A 270 s IEEE 488 address 60 WRTS 78T87X0SIM0OA3R25
61. ht be drawn If any fuse opens the VXIbus Resource Manager will be unable to assert SYSFAIL INHIBIT on this module to disable SYSFAIL If any fuse opens remove the fault before replacing the fuse Replacement fuse information is given in the Specifications section of this manual 73A 270 DESCRIPTION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com e LEDs The following LEDs are visible at the top of the 73A 270 Module s front panel to indicate the status of the module s operation Power LED This green LED is normally lit and is extinguished if the 5V 5 2V 2V or 24V buses or the internally regulated 20 9V buses fail or if the 2V 5V 5 2V or 24V fuses open Failed LED This normally off red LED is lit whenever SYSFAIL is asserted indicating a module failure Module failure consists of loss of a power voltage NOTE If the module loses any of its power voltages the Failed LED will be lit and SYSFAIL asserted A module power failure is indicated when the module s Power LED is extinguished MSG LED This green LED is normally off When lit it indicates that the module is processing a VMEbus cycle The LED is controlled by circuitry that appears to stretch the length of the VMEbus cycle For example a five microsecond cycle will light the LED for approximately 0 2 seconds The LED will remain lit if the module is being constant
62. ifies the duration of the output level as z times 100 nanoseconds microsecond 10 microseconds or 100 microseconds depending upon the resolution programmed for that channel The z parameter is not optional Z is a 1 digit decimal integer from O to 7 that specifies the output polarity active or inactive breakpoint and last address bits for the current memory address as shown Z Last Break Command Value Address point Polaritv Format 0 No No Inactive 2z 0L No No Active Z 1L 2 No Yes Inactive 2 2L 3 No Yes Active z 3L 4 Yes No Inactive 2z 4L 5 Yes No Active z 3L 6 Yes Yes Inactive z 6L 7 Yes Yes Active z 7L An active polarity output generates the following polarities TTL Out BNC connector TTL high Pulse Pattern DB25S Output active high TTL high Pulse Pattern DB25S Output active low TTL low VXIbus TTLTRG line open collector low Analog Bipolar Output as programmed by P command Z is not optional It must be the last number to precede the L character as shown under Command Format in the table above A comma or carriage return line feed lt CR gt lt LF gt may be used to separate z and Z but is not required The L command strobes the time duration data and polarity breakpoint and last address bits as specified by z and z into the present memory address The memory address register is incremented automatically after the data is stored allowing data to be stored in sequential addresses without send
63. igger to Channel A immediately starting transmission and arms Channel B for occurrence of an external trigger on TTLTRGI A subsequent OB command to Channel A during the transmission will restart Channel A transmission at the beginning of the data list A subsequent B command or external trigger to Channel B while it is transmitting will be ignored unless breakpoints have been programmed into the data list for Channel B 73A 270 33 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command N Inactive Analog Bipolar Level Syntax zN Purpose The N command programs the inactive level of the analog bipolar output for the selected channel Description zisa 2 digit signed decimal number from 00 to 87 that specifies the inactive output level into a 50 ohm load as a multiple of 100 millivolts Leading zeros are required the sign is optional The inactive level is the level resulting from programming the polarity bit associated with a time duration to inactive using the L command and the level present on the output when the module is not transmitting The output into a high impedance load will be twice the programmed output level providing a maximum output level of 17 4V The output level for loads other than 50 ohms or open high impedance may be calculated as follows Output Level 2 Programmed Voltage Value R R 50 where R is the load On power u
64. ignals provided at the 25 pin DB25S front panel connector are gt external clock input allows several modules to be programmed for parallel operation gt buffered internal clock allows any module to be the common clock source for a parallel module output configuration gt transmission in progress indicates whether transmission is in progress for each channel See Appendix B for a complete description of these signals 73A 270 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com The module will begin operations The 73A 270 Module will be ready for programming as soon as the VXIbus Resource Manager has initialized the VXIbus system The 73A 270 Power LED will be on and all other LEDs off The MSG LED will blink during the power up sequence as the VXIbus Resource Manager addresses all modules in the card cage The default condition of the module after power up is described in the SYSFAIL Self Test and Initialization subsection Although these non data commands are initiated by the 73A 270 s commander for example the 73A 151 Module in a CDS 73A IBX System rather than the system controller they have an effect on the 73A 270 Module The following VXIbus instrument protocol commands will affect the 73A 270 Command Effect CLEAR The module clears its VXIbus interface The 73A 270 Module has no input or output command buff
65. ing an A Address command before each L command 73A 270 29 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Example A breakpoint causes the transmission to pausc at the end of the time duration for which it is specified The outputs will hold the polarity programmed for the last time duration prior to the pause An interrupt may be enabled see I command which generates an interrupt when the breakpoint occurs The breakpoint is exited when the channel is triggered again The last address capability allows variable line length data lists of less than 1600 items to be transmitted or repeated In Progress Updates An L command can be sent while the module is transmitting allowing in progress updating of the data stream output The new data can be specified atan address other than the address actively transmitting with minimal or no effecton the transmission A minimal output time duration distortion occurs if the output is transitioning exactly when the new data is strobed into memory in which case the transition is delayed two time increments i e 200 nanoseconds To avoid the time increment delay in progress commands should be timed to occur when the output data is not changing If in progress data updates occur when the data to be up dated is presently being transmitted the new data will be effective immediately allowing lengthening or shortening the duration c
66. interruption Each trigger restarts output from first output duration BEER HH aaa 734 270 8 SPECIFICATIONS Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Trigger Capability Programmable Sources programmable External Trigger Input VXIbus TTLTRG Selection Trigger Delay Breakpoint Capability Programmed By On Card Memory Clock Source External Clock Input Type Input Range Loading External Clock Outputs Type Frequency TTL Outputs Channel A and B Pulse Pattern Outputs Trigger under program control or trigger with external trigger input from multiple sources Internal Software initiated External Front panel connector Any of 8 VXIbus TTLTRG lines VXIbus TRIGGER command Input Front Panel or VXIbus TTLTRG Trigger occurs on TTL transition from high to low Front Panel Loading 1 TTL load equivalent with 10K pullup Programmable TTLTRG 0 through 7 synchronous trigger protocol From receipt of trigger to start of output 315 ns 0ns 100 ns for all resolution ranges l to 1600 programmable breakpoints for each channel Available in either Retriggerable or Non Retriggerable modes ASCII characters 3200 24 bit words 1600 words channel Internal VXIbus slot 0 10 MHz ECL clock External front panel connector TTL kHz to 10 MHz 1 25 TTL load equivalents TTL 15 mA source 64 mA sink curr
67. ition from the inactive state will occur either immediately on triggering or after one or more durations of output Both polarities of the output are available at the module s DB25S front connector so that a aaaea 73A 270 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com either polarity may be defined as the inactive state BNC connectors are provided on the front panel for TTL output and the bipolar analog output levels for each of the two channels Repeat Count The complete output pulse train for each channel can be programmed to repeat from l to 63 times or indefinitely The individual output durations active or inactive including the level duration presently transmitting may be updated in progress while the module is transmitting TILTRG Capability Each channel s output may be programmed to drive any of the eight VXIbus TTLTRG backplane lines The 73A 270 s ability to output short pulses repeated or delayed by extremely long intervals makes it useful for triggering other VXIbus instruments External Triggering The external triggers for each channel may also be driven under program control by any of the eight VXIbus TTLTRG lines By selecting the same TTLTRG line one channel s pulse pattern output may be used to externally trigger the other channel or other APPG modules Bipolar Analog Outputs The bipolar analog output for both the
68. l it is recommended that you follow the order presented as some tests rely on previously verified parameters Before starting the the test sequence verify that the SLOW EXTERNAL CLOCK is in the OFF position and that the FAST EXTERNAL CLOCK is in the C1 position Also ensure that the INT LEVEL is set to the same level as the Slot 0 Com mander module NOTE All ASCII character string commands enclosed in quotes which are sent to the 73A 270 must be in UPPER CASE You may wish to leave your keyboard in the CAP LOCK mode 73A 270 Arbitrary Pulse Pattern Generator Module 61 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification VXlbus Interface This sequence verifies that the 73A 270 configures correctly and communicates properly with your system controller Equipment Requirements Oscilloscope item 1 50 Q Coaxial Cable item 5 Prerequisites All prerequisites listed on page 56 1 Send the appropriate commands to the Slot O device to get the primary sec ondary GPIB address of the 73A 270 73A 541 and VX4790A Place these addresses into the IBCONF configurator for the VX270 VX541 amd VX4790A GPIB device 2 Verify that the 73A 270 responds to setup commands with the following steps a Connect the 73A 270 TTL OUT A to Ch 1 of the oscilloscope 2 V div 250 ns div 1 MQ input impedance b With the following commands se
69. lar output voltage level for the selected channel corresponding to an inactive pulse pattern signal output P Active Analog specifies the analog bipolar output voltage level for the selected channel corresponding to an active pulse pattern signal output Input Request An Input Request to the 73A 270 returns status information for the selected channel An input request is not a command output It is generated by reading from the module I Interrupt enables or disables interrupt capability for the selected channel B Begin triggers data transmission for one or both channels Transmission will begin immediately if external triggering is not active If external triggering is active for a channel the B command arms the external trigger input Subsequently received external trigger inputs will then initiate transmission Q Quit stops transmission in progress for one or both channels A detailed description of each command in alphabetical order is given on the following pages e Command Descriptions Command A Address Syntax ZA Purpose The A command specifies a memory address in the selected channel s memory IA 73A 270 22 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Description Example z isa l to 4 digit decimal integer from 0 to 1599 that specifies the current memory address for the selected channel If z is omitted the addr
70. ledge for a particular VME interrupt level The software interrupt handler mav or may not be on the same module as the hardware interrupt handler In the case of CDS instrument modules both the hardware and software interrupt handlers reside on the commander module of a given servant module Logical Address A unique 8 bit number which identifies cach VXIbus device in a system It defines the devices Al6 register addresses and indicates the devices commander servant relationship Reser Bit Bit O in the Control register of the module When set to a one 1 by the module s commander or resource manager and the 73A 270 Halt switch is ON the 73A 270 is forced into a reset state Resource Manager A message based commander located at logical address 0 which provides configuration management services including commander servant mapping address map configuration self test and diagnostic management In CDS systems the Resource Manager function is co located with the VMEbus controller the slot 0 timing functions and the system controller interface Servant A YXIcus device that may or may not have bus master capability that is under control of a commander in the VXIbus system hierarchy A servant may also be a commander ac a i tar au APPENDIX C Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Soft Reset This state is entered waen th
71. lse duration of 100 ns 10 ns 73A 270 Arbitrary Pulse Pattern Generator Module 63 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification IBWRT OROA11L14LOC0B Observe 100 ns 10 ns pulse width c Verify the additional time base resolutions as directed in Table A 4 Table A 4 Time Base Resolution Verification Command to Send Pulse Width to Verify IBWRT OROA11L14LOC0B 100 ns 10 ns step 2b repeated for table continuity IBWRT Q1ROB 1 us 10 ns IBWRT Q2ROB 10 us 10 ns IBWRT Q3ROB 100 us 10 ns IBWRT Q Verify that the waveform stopped 3 To verify the pulse duration multiplier set the 734 270 for a 100 ns resolution to the beginning of the address space for a first List entry of 100 us active high for a second List entry of 100 us active low and designated as the Last Address to transmit the list continuously and finally to begin transmission of the last channel selected Verify a 5 kHz 0 5 Hz square wave IBWRT OROA10001L10004LOC0B Verify 5 kHz 0 5 Hz 4 Verify the additional pulse duration multipliers as directed in Table A 5 NOTE The last measurement in Table A 5 may require a Timer Counter if you wish to verify the precise tolerances listed 64 73A 270 Arbitrary Pulse Pattern Generator Module Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www
72. lse pattern Table A 7 VXIbus TTL Trigger Line Verification Ch B triggered by Ch A TTLTRG Line Change Setup amp Restart Pattern TTLTRG1 IBWRT 81X18T IBWRT 1B Verify a 500 kHz pulse pattern TTLTRG2 IBWRT Q82X28T 70 IBWRT 1B 73A 270 Arbitrary Pulse Pattern Generator Module Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification Table A 7 Cont VXIbus TTL Trigger Line Verification Ch B triggered by Ch A TTLTRG Line Change Setup amp Restart Pattern TTLTRG3 IBWRT Q83X38T IBWRT 1B TTLTRG4 IBWRT Q84X48T IBWRT 1B TTLTRG5 IBWRT Q85X58T IBWRT 1B TTLTRG6 IBWRT Q86X68T IBWRT 1B TTLTRG7 IBWRT Q87X78T IBWRT 1B e With the following commands disable both channels from the TTLTRGX lines and restart the channel A pulse pattern Verify that channel B is not putting out any pulse pattern and then stop the pulse transmission IBWRT Q88X88T IBWRT 1B Verify that channel B is not putting out any pattern IBWRT Q 8 Verify the EXT TRG B input with the following steps a Connect TTL OUT A to EXT TRG B Restart both channels by sending IBWRT 1B Verify a 500 kHz pulse pattern b Check that channel B is putting out a 500 kHz pulse pattern triggered by channel A and then stop the pattern by sending IBWRT Q Verify that the pattern stopped c Disconnect TTL OUT A
73. lso it is not necessary to complete the entire procedure if you are only interested in a specific performance area Some tests depend on the correct operation of previously verified functions so 1t is best to perform the entire procedure in the order presented The following skills are required to perform this procedure m Thorough knowledge of test instrument operation and proper measurement techniques m Knowledge of VXIbus system components and command language programming m Ability and facility to construct interconnections and fixtures as needed to perform the procedure General Information and Conventions Please familiarize yourself with the following conventions which apply throughout the procedure m Each verification sequence begins with a table similar to the one below which provides information and requirements specific to that section Equipment Requirements Oscilloscope item 1 Oscilloscope Probe item 2 Prerequisites Prerequisites listed on page 56 The item number after each piece of equipment refers to an entry in Table A 1 Required Test Equipment m This procedure assumes that your VXIbus system is configured as indicated in Table A 3 and that you will be using the National Instruments PC GPIB controller and software NI 488 2M In the verification sequences you will be instructed to issue Interface Bus Interactive Control ibic commands to set up the 73A 270 system Please refer to the NI 488 2M
74. ly addressed Mode Resolution LEDs Four LEDs are provided for each of the two channels Channel A and Channel B The eight LEDs are arranged in the following order at the top front of the module When lit the LEDs indicate the following XMTA hannel A is transmitting EXTA Channel A external trigger is enabled TBOA Channel A resolution least significant bit TBIA Channel A resolution most significant bit XMTB Channel B is transmitting EXTB Channel B external trigger is enabled TBOB Channel B resolution least significant bit TBIB Channel B resolution most significant bit The TBO and TBI resolution LEDs are encoded as follows TB LED TBO LED Resolution OFF OFF 100 nanosecond OFF ON 1 microsecond ON OFF 10 microsecond ON ON 100 microsecond Four LEDs for each channel provide visual indication of the transmit status resolution status and external trigger mode A readback mode provides the transm status and data list command accept status of either channel Finally the serial pattern output connections to the VXIbus TTLTRG lines allow checking the programming and output intervals by any counter resource in the same V XIbus card cage e 73A 270 DESCRIPTION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com A glossary of VXIbus terms is provided in Appendix C In addition the following terms specific to the 734 270 Mod
75. mmed for internal triggering by the M command This command programs both Channel A and Channel Band is not dependent on which channel is programmed by the S command The command string 93X selects the VXI bus TRIGGER command from the VXIbus commander of the 73A 270 for Channel A and VXIbus TTLTRG3 for Channel B as the sources for any external trigger programmed for the two channels 73A 270 41 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com The 73A 270 Module will reset to its default condition at power up or for a VXIbus hard or soft reset condition A VXIbus hard reset occurs when another device such as the VXIbus Resource Manager asserts the backplane line SYSRST A VXIbus soft reset occurs when another device such as the 73A 270 s commander sets the Reset bit in the 73A 270 s Control register and the Halt Switch is ON The 73A 270 Module continuously monitors the 5V de 24V dc 5 2V de 2V dc and its own internal 20 9V de power supplies If all power supplies are valid on power up 1 The SYSFAIL VME system failure line will never be set active and the Failed LED will not be lit If any of the supplies fails either at power up or during operation the SYSFAIL line will be set active and the Failed LED will be lit and remain lit 2 The module enters the VXIbus PASSED state ready for normal operation on power up if all p
76. mplemented Data Low read write Word Serial Commands A write to the Data Low Register causes this module to execute some action based on the data written This section describes the device specific Word Serial commands this module responds to and the results of these commands Read Protocol Command 15 14 13 12 1110 9 8 7 6 5 4 3 2 1 0 1 10 1 1 2 I 1 1 1 2312 2 212 2 1 2 If the Data Low register is read after this command the contents are as follows VXIbus Revision Level Bit 15 0 VXIbus Revision 1 2 Device Device dependent unused Bits 14 13 12 11 1 1 1 1 Reserved Bits 10 9 8 7 6 5 1 1 1 1 1 1 Triggered supports trigger command Bit 4 0 This module supports the trigger command 73A 270 49 APPENDIX A Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com 14 supports VXIbus 488 2 Instrument protocol Bit 3 l This module does not support 488 2 protocol I supports V XIbus Instrument protocol Bit 2 0 This module supports instrument protocol ELW supports Extended Longword Serial protocol Bit l This module does not support ELW protocol LW supports Longword Serial protocol Bit 0 l This module does not support LW protocol 73A 270 Interrupts The 73A 270 will interrupt its commander with the following events Unrecognized Command Event 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 1 1 1 0 1 1 1 1 lt Logical Address gt
77. n that language that will give the same result nn a I a 73A 270 42 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command Result CALL ENTER R LENGTH0 ADDRESS STATUS The CALL ENTER statement inputs data into the string R from the TEEE 488 instrument whose decimal primary address is contained in the variable ADDRESS Following the input the variable LENGTH contains the number of bytes read from the instrument The variable STATUS contains the number 0 if the transfer was successful or an 8 if an operating system timeout occurred in the PC Prior to using the CALL ENTER statement the string R must be set to a string of spaces whose length is greater than or equal to the maximum number of bytes expected from the 73A 270 CALL SEND ADDRESS WRTS STATUS The CALL SEND statement outputs the contents of the string variable WRTS to the IEEE 488 instrument whose decimal primary address is contained in the variable ADDRESS Following the output of data the variable STATUS contains a 0 if the transfer was successful and an 8 if an operating timeout occurred in the PC END Terminates the program FOR NEXT Repeats the instructions between the FOR and NEXT statements for a defined number of iterations GOSUB n Runs the subroutine beginning with line n EX GOSUB 750 runs the subroutine beginning on line 750 The
78. nnectors Recommended Cable Equipment Supplied When ordered with a CDS card cage this module will be installed and secured in one of the instrument module slots slots 1 12 When ordered alone the module s shipping dimensions are 406 mm x 305 mm x 102 mm 16 in x 12 in x 4 in 1 4 kg 3 1 Ibs When ordered with a CDS card cage this module will be installed and secured in one of the instrument module slots slots 1 12 When ordered alone the shipping weight is 1 9 kg 4 3 lbs Any orientation Installs in an instrument module slot slots 1 12 of a C or D size VXIbus card cage Refcr to D size card cage manual for information on required adapters Six BNC jacks Pulse pattern outputs TTL Pulse pattern outputs bipolar External trigger inputs One DB 255 connector Pulse pattern outputs TTL active high and active low Pulse pattern outputs bipolar External trigger inputs Transmission in progress outputs TTL active high and active low External clock input and output for DB 25S connector 73A 734 Data Cable or 73A 782P Hooded Connector 73A 270 Arbitrary Pulse Pattern Generator Module 73A 270 13 SPECIFICATIONS Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com INSTALLATION The 73A 270 Module is a C size VXIbus instrument module and therefore may be installed in any C or D size VXIbus card cage slot o
79. nology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com A decimal address in the 1600 word memory is selected with an A Address command Memory data values consisting of a time duration value and polarity a last location identifier and breakpoint location identifiers are loaded into that address with an L List command The selected address automatically increments after each L List command or it may be reprogrammed at any time with the A command The selected channel is programmed for the number of times the entire data list in memory is to be transmitted with the C Count command The selected channel may also be programmed with the M Mode command to select or deselect the retriggerable or non retriggerable modes with or without external trigger enabled or to enable or disable the VXIbus interrupt capability with the I Interrupt command Transmission is then initiated with the B Begin command e Programmable Features Modes Four output modes are provided for each channel The first two the Non Retriggerable Modes with internal or external triggering each transmit the string of active and inactive level outputs the specified number of times ignoring additional triggers during transmission The second two the Retriggerable Modes with internal or external triggering reset the module to the beginning of the transmit string if an additional trigger is re
80. nsmission retriggering modes or interrupt enabling Very complex wave trains may be programmed For example up to 800 100 nsec pulses may be programmed with the intervals between each pulse varying from 100 nsec to 100 msec Or by programming 1500 consecutive 100 millisecond active levels followed by a 100 nsec inactive level a 100 nsec pulse may be accurately delayed 150 seconds In the higher resolution range a 100 psec pulse may be delayed up to 150 000 seconds 41 hours Each location in memory can be identified as an active or inactive output Any location in the memory can be identified as the last address in order to provide a variable length data list Any number of locations in the memory can be identified as breakpoints for independent triggering of segments of memory Four cight channel multiplexers allow connection of the channel A and B pulse pattern output and external trigger input to any of the eight VXIbus TTLTRG lines There are two bipolar analog output amplifiers for each channel providing a programmable active and inactive level for each channel e Programming Sequence The typical programming sequence ts One of two channels is selected with an S Select command All channel specific commands apply to that channel until another channel is selected An R Resolution command is used to specify one of four clock resolutions for the selected channel 73A 270 OPERATION Artisan Tech
81. ogy Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com APPENDIX C VXIbus GLOSSARY Certain terms used in this manual have very specific meanings in the context of a VXIbus System A list of these terms is presented below Commander A VXIbus device that has bus master capability and has VXIbus servants under it in the system hierarchy A commander may be a servant as well Handshake Fast Compared to the Normal Transfer Mode of the VXlbus the Fast Handshake Transter Mode reduces the number of VMEbus data transfer cycles by 30 Upon receipt of a request for data a fast handshake module is able to return data in less than 20 us so that the VXIbus last handshake protocal can be used bv the module s commander Using fast handshake protocol data can be written and read without checking the Ready bits in the module s Response register Reset Hard This is the state of the module wnen the SYSRESET line is true While in this state the module is inactive and its Status and Control registers are cleared The SYSFAIL line is driver low and the Failed LED is lit In the case of a CDS 73A IBX Card Cage for example a module hard reset occurs when the card cage is powercd up or the Reset switch on the front panel ot the 734 151 Resource Manager IEEE 488 Interface Module is depressed Interrupt Handler The module in the VXIbus ystem that generates the hardware interrupt acknow
82. order for the 73A 270 Module to operate properly Check the manual of the card cage being used for jumpering instructions If a CDS 73A 021 Card Cage is being used the jumper points may be reached through the front of the card cage There are five 5 jumpers that must be installed for each empty slot The five jumpers are the pins to the left of the empty slot a 73A 270 14 INSTALLATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com CAUTION The 73A 270 Module is a piece of electronic equipment and therefore hassomesusceptibility toelectrostatic damage ESD ESD precautions must be taken whenever the module is handled Record the module s Revision Level Serial Number located on the CDS label on the top shield of the 73A 270 and switch settings on the Installation Checklist on the next page Only qualified personnel should install the 73A 270 Module Verify that the Logical Address and Interrupt Level switches are switched to the correct value The Halt switch should be in the ON position unless it is desired to not allow the resource manager to reset this module Note that with cither Halt Switch position a hard reset will occur at power on and when SYSRST is set true on the VXIbus backplane If the module s commander is a CDS 73A 151 RM IEEE 488 Interface Module SYSRST will be set true whenever the Reset Switch on the front panel of the
83. ower supplies are valid The default condition of the 73A 270 Module after the completion of power up is Channel A Selected Resolution 100 nanosecond both channels Mode Retriggerable both channels External Trigger Disabled both channels External Trigger Source Front panel both channels VXIbus TILTRG Pulse Pattern Output Not connected Interrupt Capability channels Disabled both Channel A and B Pulse Pattern Memory Contents Undefined Channel A and B Repeat Count Undefined Power LED Lit All Other LEDs Extinguished Pulse Pattern Outputs Inactive Transmission In Progress Outputs Inactive SYSFAIL Operation SYSFAIL becomes active for any power supply failure or if the module loses any of its power voltages When the card cage Resource Manager detects SYSFAIL set it will attempt to inhibit the line This will cause the 73A 270 Module to deactivate SYSFAIL in all cases except when 5 volt power is lost This section contains example programs which demonstrate how the various programmable features of the 73A 270 are used The examples are written in BASIC using an IBM PC or equivalent computer as the system controller e Definition of BASIC Commands The programming examples in this manual are written in Microsoft GW BASIC using the GW BASIC commands described below If the programming language you are using does not conform exactly to these definitions use the command i
84. ower is provided by the Power Supply in the VXIbus card cage 5 Volt Supply 4 75V dc to 5 25V de 24 Volt Supply 23 2V dc to 25 2V dc 24 Volt Supply 23 2V de to 25 2V dc 5 2 Volt Supply 4 95V de to 5 45V de 2 0 Volt Supply 1 9V dc to 2 1V dc 5 volt supply 33 A 24 volt supply 120 mA 24 volt supply 100 mA 5 2 volt supply 35 mA 2 0 volt supply 26 mA 5 volt supply 150 mA ptp 23 MHz 24 volt supply 185 mA ptp 23 MHz 24 volt supply 245 mA ptp 17 MHz 5 2 volt supply 435 mA ptp 23 MHz 2 0 volt supply 435 mA ptp 22 MHz 424V de tested with 7V de MHz bipolar output into 50 Ohms on both channels Provided by the fan in the VXIbus card cage Less than 10 C temperature rise with 1 76 liters sec of air ata pressure drop of 0 099 mm of H O Replacement fuses 5V Littlefuse P N 273004 5 2V 2V Littlefuse P N 273002 24V Littlefuse P N 273001 10 C to 65 C operating assumes ambient temperature of 55 and airflow to assure less than 10 C temperature rise 40 C to 85 C storage Less than 95 R H noncondensing Complies with V XIbus Specification Complies with VXIbus Specification KK a 5 5 aa 73A 270 12 SPECIFICATIONS Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Dimensions Shipping Weight Weight Shipping Mounting Position Mounting Location Front Panel Signal Co
85. p or reset the module is programmed for an inactive output level of 0 volts dc Examples I 67N programs an inactive level of 6 7 into a 50 ohm load or 13 4 into an open load 2 09N programs an inactive level of 900 millivolts into a 50 ohm load or 1 800 volts into an open load 3 To determine the programmed voltage value needed to achieve a 12 volt output into a 300 ohm load use the above equation as follows Programmed Voltage Value Output Level R 50 2R or PVV 12 300 50 7 volts 2 300 The command 70N will achieve the desired inactive level output of 12V for a 300 ohm load nn S 73A 270 34 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command Syntax Purpose Description Examples P Active Analog Bipolar Level zP The P command programs the active level of the analog bipolar output for the selected channel z isa 2 digit signed decimal number from 00 to 87 that specifies the active output level into a 30 ohm load as a multiple of 100 millivolts Leading zeros are required the sign is optional The active level is the level resulting from programming the polarity bit associated with a time duration to active using the L command The output into a high impedance load will be twice the programmed output level providing a maximum output level of 17 4V The output level for loads other than 50 ohms or open
86. que logical address and can be calculated as follows Base Address V 40H COOOH where Y is the device s logical address as set in the Logical Address switches 73A 270 Configuration Registers Below isa list of the 73A 270 Configuration Registers with a complete description of each In this list RO Read Only WO Write Only R Read and W Write The offset is relative to the module s base address Register Address Type Value Bits 15 0 ID Register 0000H RO 1011 1111 1111 1100 BFFCh Device Type 0002H RO See Device Type definition below Status 0004H R 1X11 1111 1111 1111 BFFFh or FFFFh Control 0004H W 0111 1111 1111 110X 7FFCh or 7FFDh Offset 0006H WO Not used Protocol 0008H RO 11110111 1111 1111 F7FFh Response 000AH RO Defined by state of the interface Data High 000CH Not used Data Low 000EH Ww See Data Low definition below Data Low 000EH R See Data Low definition below 73A 270 47 APPENDIX A Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com BIT DEFINITIONS Register ID 15 14 13 12 11 0 Device Type 15 0 Bit Location Bit Usage Device Class Address Space Manufact ID Device Type 73A 270 Value 10 11 1111 1411 1100 1111 1110 1111 0001 73A 270 Usage Message Based A16 only Colorado Data Systems Ones comp of 270 Status 15 A24 32 Active l Not used 14 MODID l MODID line not active 0 MODID line active 13 4 Devic
87. quired item 5 Arbitrary Waveform or Pattern Generator clock source item 4 SMB to BNC Adapter Cable item 6 BNC Female to BNC Female item 7 BNC Male to Dual Binding Post Adapter item 8 DB 25 connector with wires soldered to pins 4 amp 5 item 9 Prerequisites All prerequisites listed on page 56 All previous Performance Verification Tests 1 Verify the Fast External Clock 250 kHz to 10 MHz with the following steps a Turn the mainframe power off and remove the 73A 270 Change the FAST EXTERNAL CLOCK switch from the C1 internal to the C2 external position Return the 73A 270 to the mainframe and turn on the mainframe the power b Connect TTL OUT A to Ch 1 of the oscilloscope 2 V div 100 us 1 MQ input impedance c Connect the Arbitrary Waveform Generator AWG ARB OUT to the 73A 270 Fast External Clock pin 5 of S1 front panel DB25 5th pin up from bottom right and pin 4 4th pin up from bottom right digital ground using the SMB to BNC cable the BNC barrel connector the BNC dual binding post adapter and two short pieces of 26 AWG jumper wire soldered to pins 4 and 5 of a male DB 25 connector d Set the clock source AWG to generate a 1 MHz square wave IBFIND VX4790 IBWRT SETSQUARE O 2 5 1000000 10 T The fourth parameter is numeric one followed by alphabetic O 73A 270 Arbitrary Pulse Pattern Generator Module 73 Artisan Technology Group Quality Instrumentation Guaranteed 888 88
88. rnal trigger is required to continue operation following each breakpoint occurrence Operation With Non Retriggcrable mode Internal Triggering The B command is required to start transmission An additional B command is required to continue transmission after each memory address identified as a breakpoint address B commands issued while the module is transmitting will be ignored If no breakpoints are programmed the module will transmit the data list the number of times specified by the C command ignoring any triggers during transmission A new trigger following completion of the transmission will repeat the transmission Operation With Non Retriggerable mode External Triggering A single B command to arm transmission and an external trigger to start transmission are required External trigger inputs are then used to continue transmission after each memory address identified as a breakpoint address External triggers issued while the module is transmitting will be ignored unless the channel is halted ata breakpoint When the list has been transmitted the specified number of times an additional B command is required to arm the external trigger again The command string 8 1XOSOMIS3MIB programs Channel A for the Retriggerable mode with internal triggering and Channel B for the Non retriggerable mode with external trigger 81X programs VXIbus TTLTRG as the source of the external trigger on Channel B 1B sends a software tr
89. rogrammed 11L194L8C Programs a usec pulse followed by a 19 usec gap for transmission cight times 1B Arms both Channels A and B for an external trigger Channel A from the front panel BNC and Channel B from VXIbus TTLTRG7 Operation will start as soon as the First pulse occurs on the Channel A BNC input OS Selects Channel A for the status response read in Line 90 e e e e o e A 5 5 a _ _ q KAKAKAK lt K 73A 270 45 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com APPENDIX A VXlbus OPERATION The 73A 270 Module is a C size single slot VXIbus Message Based Word Serial instrument It uses the Al6 DI6 VME interface available on the backplane Pl connector and does not require any A24 or A32 address space The module is a D16 interrupter The 73A 270 Module is neither a VXIbus commander nor VMEbus master and therefore it does not have a VXIbus signal register The 73A 270 is a VXIbus message based servant The module supports both the Normal Transfer mode and the Fast Handshake Mode of the VXIbus using the Write Ready and Read Ready bits of the module s Response register A Normal Transfer mode Read of the 73A 270 Module proceeds as follows l The commander reads the 73A 270 s Response register and checks if the Write Ready bit is true If it is the commander proceeds to the next step If not the commander continues to poll the Write Ready
90. rumentation Guaranteed 888 88 SOURCE www artisantg com EC Declaration of Conformity Tektronix Holland N V Marktweg 73A 8444 AB Heerenveen The Netherlands declare under sole responsibility that the 73A 270 meets the intent of Directive 89 336 EEC for Electromagnetic Compatibility Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities EN 55011 Class A Radiated and Conducted Emissions EN 50081 1 Emissions EN 60555 2 AC Power Line Harmonic Emissions EN 50082 1 Immunity IEC 801 2 Electrostatic Discharge Immunity IEC 801 3 RF Electromagnetic Field Immunity IEC 801 4 Electrical Fast Transient Burst Immunity IEC 801 5 Power Line Surge Immunity To ensure compliance with EMC requirements this module must be installed in a mainframe which has backplane shields installed which comply with Rule B 7 45 of the VXIbus Specification Only high quality shielded cables having a reliable continuous outer shield braid amp foil which has low impedance connections to shielded connector housings at both ends should be connected to this product Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com rtisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Table of Contents Description INTOCUCHON vir a A ha A A Ro dc 1 Controls And Indicators 06 0 ccc
91. shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment or c to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com rtisan Technology Group Quality Inst
92. t is generated causing an interrupt at the VXIbus interrupt level selected by the Interrupt Level Select Switch on the 73A 270 Module The VX Ibus Interrupt Acknowledge clears the interrupt Triggering the module to resume transmission arms the interrupt for the next transmission completion or breakpoint The 73A 270 generates two additional types of interrupts that cannot be disabled and are unaffected by the I command They are the VXIbus Unrecognized Command interrupt and the Memory Busy Overwrite interrupt see the L command The interrupt status may be read from the module at any time The interrupt status is returned in response to an input request to the module see Input Request as a two digit decimal integer followed by a carriage return and line feed lt CR gt lt LF gt Example The command string OS1TISOI enables the XMIT Complete interrupt for Channel A and disables the XMIT Complete interrupt for Channel B See the Input Request command description for an example of the response to an Input Request SR 73A 270 28 OPERATION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Command L List Syntax ZZL Purpose For the selected channel the L command specifies the time duration and polarity of the output level breakpoint and last address determination for the current memory address Description z is a l to 6 digit decimal integer from to 999999 that spec
93. t the 73A 270 to the beginning of the address space for the first List entry to have a duration of 500 ns 5x100 ns power on default resolution active high for the second List entry to have an active low duration of 500 ns and to be designated as the Last Address to transmit the list continuously and finally to begin transmission of the last selected channel in this case Ch A the power on default Verify a 1 MHz 50 duty cycle pulse pattern IBOC Start GPIB Talker Listen Controller program IBFIND VX270 IBRD 100 Observe 00 response IBWRT OA51L54L0COB Observe 1 MHz square wave IBWRT Q Observe waveform stops 3 To verify interrupt capability set the 73A 270 to enable the transmit complete interrupt XMIT and to generate a burst of 63 pulses Then read and verify a response of 02 This response means that there is no transmis sion in progress that an interrupt has been generated due to transmission completion or breakpoint that the memory is not busy and that a Memory Busy Overwrite interrupt has not been generated Following the read the Slot 0 controller will be un addressed and will acknowledge the interrupt as an SRQ pending 62 73A 270 Arbitrary Pulse Pattern Generator Module Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification NOTE Make sure the 73A 270 and the Slot O Resource Manager are set to the same I
94. tern Generator Module Appendix D Performance Verification Self Test Following the VXIbus system startup sequence the green PWR light on the 73A 270 front panel indicates that all power supplies are operational If the 5 V 5 2 V 2 V 24 V or the internally regulated 20 9 V buses fail or if the 2 V 5 V 5 2 V or 24 V fuses open the PWR light will be off Additional ly the FAILED light will be on and SYSFAIL will be asserted indicating a module failure If any of the Mode or Resolution lights are on it usually is an indication that the 73A 270 has not completed its initialization correctly One typical reason for this condition is the FAST EXTERNAL CLOCK switch being in the external C2 position NOTE If you experience any error indication from the Slot O Resource Manager the 73A 270 or other VXIbus module investigate and correct the problem before proceeding Common items to check are logical address conflicts primary and secondary see Table A 3 breaks in the VXIbus daisy chain signals improper seating of a module loose GPIB cable Performance Verification Tests This procedure verifies the performance of the 73A 270 The test sequences contain setup instructions for the example equipment listed in Table A 1 You may use equipment other than the recommended examples 1f it meets the requirements listed The order of the test sequences has been chosen to minimize system setup Although not essentia
95. th a lint free cloth 3 Remove any remaining dirt with lint free cloth dampened in a general purpose deter gent and water solution Do not use abrasive cleaners User Replaceable Parts Replacement parts are available through your local Tektronix field office or representative Changes to Tektronix instruments are sometimes made to accommodate improved com ponents as they become available Therefore when ordering parts it is important to in clude the following information in your order m Part number Instrument type or model number m Instrument serial number m Instrument modification number if applicable 73A 270 77 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com 78 Appendix E User Replaceable Parts Part Description User Manual Label Tek CDS Label VXI Fuse Micro 4 Amp 125 V Fast Fuse Micro 1 Amp 125 V Fast Fuse Micro 2 Amp 125 V Fast Collar Screw Metric 2 5 x 11 Slotted Shield Front Screw Phillips Metric 2 5 x 4 FLHD SS Part Number 070 9148 XX 950 4523 00 950 4522 00 159 0374 00 159 0116 00 159 0128 00 950 0952 00 950 4174 00 211 0867 00 73A 270 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com rtisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com rtisan Technology Group Quality Instrumentation Guaranteed 888
96. ther than slot 0 If the module is being installed in a D size card cage consult the operating manual for the card cage to determine how to install the module in that particular card cage Setting the module s logical address switch defines the modules programming address Refer to the Controls and Indicators subsection for information on selecting and setting the 73A 270 Module s logical address CAUTION To avoid confusion it is recommended that the slot number and the logical address be the same Tools Required The following tools are required for proper installation Slotted screwdriver set CAUTION Note that there are two ejector handles on the module To avoid installing the module incorrectly make sure the ejector labeled 73A 270 is at the top CAUTION In order to maintain proper card cage cooling unused card cage slots must be covered with blank front panels supplied by the card cage manufacturer Based on the number of IAC Modules ordered with a CDS card cage blank front panels are supplied to cover all unused slots CAUTION Verify that the card cage is able to provide adequate cooling and power for the 73A 270 Module Refer to the card cage Operating Manual for instructions on determining cooling and power compatibility CAUTION If the 73A 270 Module is inserted in a slot with any empty slots to the left of the module the VME daisy chain jumpers must be installed on the backplane in
97. tion Guaranteed 888 88 SOURCE www artisantg com Command Syntax Purpose Description Example X External Trigger ZZ X The X command connects or disconnects the External Trigger Input for both channels A and B to or from any of the eight VXIbus backplane TTLTRG lines TTLTRGO through TTLTRG 7 or to the VXIbus TRIGGER command or to the front panel BNC or DB25S connector External Trigger Input z and z are digit decimal integers from 0 to 9 that specify the channel A z and Channel B z external trigger source as follows Connect to IN TTLTRGO TTLTRGI TTLTRG2 TTLTRG3 TTLTRG4 TTLTRG5 TTLTRG6 TTLTRG7 front panel BNC or DB25S connector VXIbus TRIGGER command oO 0 WN BW th When connected to a TTLTRG line a high to low transition generated by another VXIbus module or this module will trigger the connected channel On power up or reset a value of 8 is programmed disconnecting the External Trigger Input from all TTLTRG lines and the V XIbus trigger command and connecting it to the front panel BNC and DB25S connector External Trigger Signal Both channels may be connected to the same TTLTRG line allowing both channels to be triggered by the same signal Any external trigger input must be enabled by the M Mode command And external trigger from any of the TTLTRG lines the front panel or the VXIbus TRIGGER command will have no effect if the channel has been progra
98. ttern Generator Module Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification 3 To verify the BPLR pulse pattern phase and 2 V accuracy set the 73A 270 to generate a continuous pulse pattern square wave from both the TTL and the BPLR outputs with a 10 us period and a bipolar amplitude of 2 0V Check that the BPLR OUT signal is in phase with the TTL OUT signal and that the amplitude is 42 0 V 2 mV SET VX270 IBWRT OS or IBWRT 1S Select Ch A or Ch B IBWRT 1ROAOC51L54L0B IBWRT 20P 20N Verify 2 0 V 260 mV 4 Reset 73A 270 for a BPLR OUT amplitudes of 5 0 V and 8 7 V and verify that the corresponding BPLR OUT signals are in phase with the TTL OUT signal and that the amplitude is within 260 mV of the value set Then change the polarity of the BPLR OUT signal and verify Finally set the BPLR OUT signal to 0 V and verify IBWRT 50P 50N Verify 5 0 V 260 mV IBWRT 87P 87N Verify 8 7 V 260 mV IBWRT 87P87N Verify 8 7 V 260 mV and opposite polarity IBWRT 00POON Verify 0 0 V 260 mV IBWRT Q Verify that the pulse pattern is stopped 5 The verification steps in this section should be performed for both BPLR OUT A and BPLR OUT B channels If you have not tested both channels repeat the steps in this section for the other channel Triggering and This sequence verifies the operation of the 73A
99. ule are defined Bipolar Outputs An output for each channel that provides the same pulse pattern output as the basic pulse pattern TTL output but at a programmable high and low level up to 17 4V for both the active and inactive states Breakpoint A programmed breakpoint temporarily holds the output at the last programmed level until a trigger instructs the module to continue Non Retriggerable Mode A programmed mode on the 73A 270 that ignores additional triggers while a channel is actually transmitting until transmission is completed or a breakpoint is executed Repeat Count A programmable count on the 73A 270 Module that allows the pulse pattern output up to 1600 locations to be repeated a specified number of times up to 63 times or continuously Retriggerable Mode A programmed mode on the 73A 270 that allows the pulsc pattern output to restart at the beginning of its transmission list if a trigger is received while the module is actively transmitting Pulse Pattern Outputs A series of active and inactive levels of varying programmable time durations provided on a single wire output Two independent outputs are provided on the 73A 270 Module Time Duration Value One of 1600 values programmable on each channel with a value of to 999 999 This value is multiplied by the resolution programmed for the channel to determine the time a particular output level active or inactive programmed in any one of the 16
100. upt level 0 8 or 9 will disable the module s interrupts When using the 73A 270 in a CDS 73A IBX System set the interrupt level to the same level chosen on the 73A 151 Interrupts are used by the module to return VXIbus Protocol Events to the module s commander Refer to the Operation section for information on interrupts The VXIbus Protocol Events supported by the module are listed in the Specifications section mmm aaa aa 73A 270 DESCRIPTION Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Halt Switch sur This two position slide switch Selects the response of the E 73A 270 Module when the Reset bit in the module s VXIbus Control register is set If the Halt Switch is in the ON position the 73A 270 Module is reset to its power up state and all programmed module parameters are reset to their default values If the Halt Switch is in the OFF position the module will ignore the Reset bit and no action will take place NOTE The module is not in strict compliance with the VXIbus Specification when the Halt switch is OFF Control of the Reset bit depends on the capabilities of the 73 A 270 s commander In a CDS 73A IBX System for example the Reset bit is set if the 73A 151 RM IEEE 488 interface Module receives a STOP command via the IEEE 488 bus External Clock Switches The 73A 270 has two External Clock switches Depending on the clock so
101. urce and or frequency of the external clock either the Fast External Clock or the Slow External Clock switch must be activated The Fast External Clock switch is a two position rocker switch Switch to position C2 if an external clock with a frequency of greater than 250 KHz up to 10 MHz is being supplied Switch to position C1 if the internal clock is to be used or if an external clock witha frequency of less than 250 KHz is to be used NOTE If a frequency of less than 10 MHz is supplied VXIbus backplane handshake times for the 73A 270 will be lengthened to greater than 500 nanoseconds The Slow External Clock Switch is a two position slide switch The switch should be placed in the ON position if an external clock with a frequency of less than 250 KHz is to be used NOTE For slow external clock operation the external clock is internally synchronized to the internal 10 MHz clock Phase jitter of up to 50 nsec will be introduced Slow external clock operation does not delay the 500 nanosecond VXIbus backplane handshake times The Fast External Clock switch instead of the Slow External Clock switch may be used for slow external clocks if throughput ts not critical and elimination of phase jitter is required e Fuses The 73A 270 Module has 5V 5 2V 2V and 24V removable fuses The fuses protect the module in case of an accidental shorting of the power bus or any other situation where excessive current mig
102. vice 0 eee tte teens 77 73A 270 i Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Table of Contents 73A 270 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com AA AA General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it Only qualified personnel should perform service procedures While using this product you may need to access other parts of the system Read the General Safety Summary in other system manuals for warnings and cautions related to operating the system Injury Precautions Avoid Electric Overload To avoid electric shock or fire hazard do not apply a voltage to a terminal that is outside the range specified for that terminal Do Not Operate Without To avoid electric shock or fire hazard do not operate this product with covers or Covers panels removed Use Proper Fuse To avoid fire hazard use only the fuse type and rating specified for this product Do Not Operatein To avoid electric shock do not operate this product in wet or damp conditions Wet Damp Conditions Do Not Operate inan To avoid injury or fire hazard do not operate this product in an explosive Explosive Atmosphere atmosphere Product Damage Precautions Provide Proper Ventilation To prevent product overheating provide proper ventilation
103. z clock signal on pin 17 of S1 4th pin up from bottom left 3 Verify the Transmission In Progress signal with the following steps a Turn the mainframe power off and remove the 73A 270 Return the SLOW EXTERNAL CLOCK switch to OFF and verify that the FAST EXTERNAL switch is in the C1 position Reinstall the 73A 270 and turn on the mainframe power Reconnect the coaxial cable to TTL OUT A and the external clock to S1 pins 5 and 4 GND 74 73A 270 Arbitrary Pulse Pattern Generator Module Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com Appendix D Performance Verification b Set the 73A 270 to generate a 500 Hz square wave and then stop the pulse pattern set VX270 IBWRT OS3ROAOM101L104L0COB Verify a square wave IBWRT Q Verify no pattern c Using the oscilloscope probe check that S1 pin 2 Transmission In Progress A active high is a TTL low level and that pin 3 Transmission In Progress A active low is a TTL high level d Restart the 500 Hz pulse pattern with the command below and check that pin 2 of S1 is now a TTL high level and pin 3 is a TTL low level IBWRT OB Check that pin 2 is high and pin 3 is low e Move the coaxial cable to TTL OUT B Program the 73A 270 to generate the 500 Hz pulse pattern on TTL OUT B and then stop the pulse pattern IBWRT 1S3ROA0M101L104L0COB Verify a square wave f Stop the pattern and again using the

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