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Appendix D: Performance Verification
73A-270 Arbitrary Pulse/Pattern Generator Module
73
This sequence verifies the high and low speed external clock inputs and the
Transmission In Progress signal inputs on the front panel DB-25 connector.
Equipment
Requirements
Oscilloscope (item 1)
Oscilloscope Probe (item 2 )
50 W BNC Coaxial Cable, two required (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 & 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 µs,
1 MW 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 0 2.5 1000000;1O;T"
(The fourth parameter is numeric one followed by alphabetic O)
External Clock and
Transmission In Progress