PNA Series Microwave Network Analyzers
E8362B, E8363B, E8364B
Checking the A38 and A39 Bias Tees (Option UNL)
1. Locate the following semirigid cable at the appropriate bias tee:
Options UNL and UNL/014 . . . . . . . . . .W55 for Port 1 or W56 for Port 2
2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the bias tee.
3. Connect the spectrum analyzer to the step attenuator connector. Set the spectrum
analyzer to measure a signal at 1 GHz.
4. If the 1 GHz signal is not present, replace the appropriate bias tee. Refer to
and Replacing the A38 and A39 Bias Tees (Option UNL)" on page
5. If the 1 GHz signal is present, replace the appropriate test port coupler. Refer to
"Removing and Replacing the A25 and A26 Test Port Couplers" on page
Service Guide E8364-90026
Troubleshooting
Measurement System Troubleshooting
"Removing
7-58.
7-48.
4-51