User Manual 3162A/B
Maintenance and Performance Checks 5-29
Triggered Operation
Checks
If there are general problems with the shape of the output waveforms or if the
output waveforms appear distorted in triggered operating mode, proceed with
the checks given in Table 5-5. Checks in this table are performed on engine
board A only. Apply an external 20 kHz TTL level signal to the trigger input and
program the Model 3162B using the following remote commands:
Remote Commands:
:RES
:OUTP ON
:INIT:CONT OFF
Table 5-5 Engine Board Checkout – Triggered Operating Mode Checks
Step
Test Point
Expected Result
1
U10, Pins 7 and 8
(This check made on the main board)
TTL level square waves, 20 KHz
2
J4A pin 1
Negative going TTL level pulses, 20 KHz, pulse width 15 ns
3
U81 pin 5
Negative going TTL level pulses, 20 KHz, pulse width 12.8ns
4
U85 pin 25
Positive going ECL level pulses, 20 KHz, pulse width 100ns
5
U85 pin 26
Negative going ECL level pulses, 20 KHz, pulse width 12.8ns
D/A, Preamplifier &
Amplitude Control
Checks
If there are problems with the shape of the output waveforms or if the output
waveforms are not generated at all, program the Model 3162B using the
following remote commands:
Remote Commands:
:RES
:FUNC:MODE USER
:OUTP ON
:INST:SEL B
:FUNC:MODE USER
:OUTP ON
Download 128-point square waveforms to both channels A and B and proceed
with the checks given in Table 5-6.
Table 5-6 Engine Board Checkout – D/A, Preamplifier and Amplitude Control Checks
S t e p
Engine Board A Test
Point
Expected Result
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