Service Guide E8364-90026 4-51
PNA Series Microwave Network Analyzers Troubleshooting
E8362B, E8363B, E8364B Measurement System Troubleshooting
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 “Removing
and Replacing the A38 and A39 Bias Tees (Option UNL)” on page 7-58.
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 7-48.
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