Service Guide N5227-90001 4-27
PNA Series Microwave Network Analyzers Troubleshooting
N5227A Measurement System Troubleshooting
• For 4-port analyzer models, traces A, B, C, D, and R1, R2, R3, and R4 are displayed in eight separate data
windows as shown in Figure 4-8. Identifying discrepancies of the traces in these windows can help you
to isolate the faulty assembly.
Figure 4-8 Typical 5-Receiver Display for 4-Port Models
• If all traces are present and are similar to the traces in Figure 4-7 or Figure 4-8, then there are no major
problems with the analyzer’s measurement system. There may, however, be a minor failure in the
analyzer.
To t e s t fu r t h er:
—Go to Chapter 3, “Tests and Adjustments” and perform all the tests in that section.
— If a problem still exists, contact Keysight. Refer to “Contacting Keysight” on page 2-6.
• 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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