Troubleshooting Faulty Assemblies; Trigger Output Check; Connecting The Test Equipment; Performing The Test - HP 8133A Service Manual

Troubleshooting Faulty Assemblies

Trigger Output Check

4-22 Troubleshooting
This section contains general tests to isolate
HP 8133A Pulse Generator, without dismantling the instrument.
The following diagram shows the relationships between the boards in
the instrument. It shows two channels fitted. Refer only to the part
that is relevant to your instrument.
Figure 4-19. Channel Links and Outputs
Detecting a signal at the Trigger Output proves that the Timing Board
is working.

Connecting the Test Equipment

HP 8 UNDER
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Figure 4-20. Setup for Testing the Trigger Output
Performing the
Test
On the H P 8133A Pulse Generator:
1. Set the interrial frequency of the HP 8133A Pulse Generator under
test to 500M:Bz
2. Set Trigger Output Hi to
3. Set Trigger Output Lo to -0.5V
4. Press Enable
On the Scope:
1. Select
2. Set to 200mV/Div
a
faulty board in the
OUT
TEST
HP
11678
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54 FRONT-END