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Appendix D: Performance Verification
66
73A-270 Arbitrary Pulse/Pattern Generator Module
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.
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 W 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 W 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 MW input impedance)
BPLR OUT A and B