Technical data

4-26 Service Guide N5230-90025
Troubleshooting PNA Series Microwave Network Analyzers
Measurement System Troubleshooting N5230C
Verifying the A, B, C, D, and R Traces (Standard S-Parameter Mode)
NOTE There is no way to view the frequency offset receiver response (Option 080). However, some
standard S-parameter receiver trace information is helpful in troubleshooting the frequency
offset section of the PNA. It is therefore recommended that you run this test even if you only
suspect the frequency offset section of malfunctioning.
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).
•On the
System menu, point to Service, Utilities, and then click Receiver Display.
• For all analyzers except those with Options 146 and 246, 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 Five Channel Display