Agilent Technologies PNA Series Service Manual page 131

PNA Series Microwave Network Analyzers
E8361A
Checking the A22 Switch
1. Locate the following semirigid cable at the A22 switch:
All . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .W3 for Port 1 or W4 for Port 2
2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the A22 switch.
3. Connect the spectrum analyzer to the connector. Set the spectrum analyzer to measure
a signal at 1 GHz.
4. If the 1 GHz signal is not present, replace the A22 switch. Refer to
Replacing the A22 Switch" on page
5. If the 1 GHz signal is present, replace the cable and then continue with
A23 and A24 SOMA 70s and the A25 and A26 Test Port Couplers" on page
Checking the A23 and A24 SOMA 70s and the A25 and A26 Test Port Couplers
1. Locate the following semirigid cable at the SOMA 70:
A23 SOMA 70 (no options) . . . . . . . . . . .W5 for Port 1
A23 SOMA 70 (option 014). . . . . . . . . . .W61 for Port 1
A24 SOMA 70 (no options) . . . . . . . . . . .W6 for Port 2
A24 SOMA 70 (option 014). . . . . . . . . . .W62 for Port 1
2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the SOMA 70 (as
required).
3. Connect the spectrum analyzer to the connector. Set the spectrum analyzer to measure
a signal at 1 GHz.
4. If the 1 GHz signal is not present, replace the SOMA 70 (as required). Refer to
"Removing and Replacing the A23 and A24 SOMA 70s" on page
5. If the 1 GHz signal is present, replace the test port coupler (as required). Refer to
"Removing and Replacing the A25 and A26 Test Port Couplers" on page
Service Guide E8361-90001
7-42.
Troubleshooting
Measurement System Troubleshooting
"Removing and
"Checking the
4-51.
7-44.
7-46.
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