4-26 Service Guide N5242-90001
Troubleshooting PNA Series Microwave Network Analyzers
Measurement System Troubleshooting N5242A
• For 4-port analyzer models, traces A, B, C, D, and R are displayed in five separate data
windows as shown in Figure 4-7. Identifying discrepancies of the traces in these
windows can help you to isolate the faulty assembly.
Figure 4-7 Typical 5-Channel Display for 4-Port Models
• If all traces are present and are similar to the traces in Figure 4-6 or Figure 4-7, then
there are no major problems with the analyzer’s measurement system. There may,
however, be a minor failure in the analyzer.
To test further:
—Go to Chapter 3, “Tests and Adjustments” and perform all the tests in that section.
— If a problem still exists, contact Agilent. Refer to “Contacting Agilent” on page 2-13.
• If any of the traces are not present, are noisy or distorted, or are at an incorrect level,
then there is a problem with the analyzer’s measurement system. Proceed to “Where to
Begin Troubleshooting.”
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