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Appendix D: Performance Verification
68
73A-270 Arbitrary Pulse/Pattern Generator Module
Equipment
Requirements
Oscilloscope (item 1)
Counter/Timer (item 3)
50 W 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 MW 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 TTLTRG0* and for Ch-B to provide the trigger pulse
on TTLTRG0*. Verify a 500 kHz pulse-pattern and then stop the pattern.
SET VX270
IBWRT "08X80T"
IBWRT "1S3R0A0M51L54L1C"
IBWRT "0S1R0A1M11L14L0C"
IBWRT "1B"
(Observe 500 kHz)
IBWRT "Q"
(Verify that the pulse-pattern stopped)
3. 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:
VXIbus 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"
TTLTRG3* IBWRT "Q38X83T"
IBWRT "1B"
TTLTRG4* IBWRT "Q48X84T"
IBWRT "1B"
TTLTRG5* IBWRT "Q58X85T"
IBWRT "1B"