Technical data

82 U4154A Logic Analyzer Service Guide
5 Troubleshooting
e Make sure the sampling positions are set properly, and
re- align any stray channels if necessary.
f Select OK to close the Eyescan - Sample Positions window.
g Select OK to close the Analyzer Setup window.
9 Switch to the Listing window by selecting the Listing tab
at the bottom of the main window.
10 Select the Run icon . The listing should look similar to
the figure below when you scroll down a bit.
Scroll down at least 256 samples to verify the data. My
Bus 1 shows four 8-bit binary counters decrementing by 1.
If the listing does not look similar to the figure, there is a
possible problem with the cable or probe. Cause for cable
test failures include:
• Open channel.
• Channel shorted to a neighboring channel.
• Channel shorted to either ground or a supply voltage.
If the test data is not correct, then perform the following
step to isolate the failure.
11 Verify the failure:
a Swap the E5379A probes so that the pod 1 cable
remains connected to the stimulus board’s pod 4
connector and the pod 2 cable remains connected to