Service Guide N5227-90001 4-35
PNA Series Microwave Network Analyzers      Troubleshooting
N5227A Measurement System Troubleshooting
Outputs” on page 4-33 are present, replace the appropriate doubler board. Refer to “Removing and 
Replacing the A60–A63 70 GHz Doublers” on page 7-44.
7. If the signal is present, reconnect all cables, and then continue with “Checking the Signal through the 
Signal Separation Path” on page 4-37.