4-26 Service Guide N5227-90001
Troubleshooting PNA Series Microwave Network Analyzers
Measurement System Troubleshooting N5227A
Verifying the A, B, C, D, and R Traces (Standard S-Parameter Mode)
The first step is to verify that the A, B,C, D, and R traces are present and that they are approximately level:
• Connect an Open or Short standard from a mechanical calibration kit to each test port (use adapters if
necessary).
• Press UTILITY , then , then , then .
• For 2-port analyzer models, traces A, B, R1, and R2 are displayed in four 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 4-Receiver Display for 2-Port Models
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