4-46 Service Guide E8361-90001
Troubleshooting PNA Series Microwave Network Analyzers
Measurement System Troubleshooting E8361A
4. For each frequency band in which problems were seen: Set the network analyzer to each
of the frequencies indicated in the “Network Analyzer Source Frequency Setting (GHz)”
column in Table 4-8 on page 4-47.
5. Set the spectrum analyzer to measure each of the corresponding frequencies in the
column labeled: “Expected A17 Output Frequency (GHz)” in Table 4-8 on page 4-47.
6. If the signals are <−30 dBm or not present, replace the A17 LOMA 12. Refer to
“Removing and Replacing the A17 LOMA 12” on page 7-32.
7. If the signals are present, reconnect cable W19, and then continue with “Checking the
A18 MA 24 Output” on page 4-48.
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