Keysight N5221A Service Manual page 105

PNA Series Microwave Network Analyzers
N5221A/22A
• For 4-port analyzer models, traces A, B, C, D, R1, R2, R3, and R4 are displayed in eight separate data
windows as shown in
to isolate the faulty assembly.
Figure 4-8 Typical 8-Receiver Display for 4-Port Models
• If all traces are present and are similar to the traces in
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"
— If a problem still exists, contact Keysight. Refer to
• 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
Service Guide N5222-90001
Figure 4-8. Identifying discrepancies of the traces in these windows can help you
and perform all the tests in that section.
Measurement System Troubleshooting
Figure 4-7 or Figure 4-8, then there are no major
"Contacting Keysight" on page
"Where to Begin Troubleshooting."
Troubleshooting
2-8.
4-27