Agilent Technologies N5230A Service Manual page 114

Troubleshooting
Measurement System Troubleshooting
Perform the following checks in the order presented.
Checking the A19 SSLAM and the A21 and A22 Test Port Couplers
1. Locate the following semirigid cable at the appropriate output of the A19 SSLAM:
• W7 for Port 1 of analyzers without Option 1E1 (no source attenuators)
• W8 for Port 2 of analyzers without Option 1E1 (no source attenuators)
• W40 for Port 1 of analyzers with Option 1E1 (with source attenuators)
• W41 for Port 2 of analyzers with Option 1E1 (with source attenuators)
2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the A19 SSLAM.
3. Connect the spectrum analyzer to the open connector. Set the spectrum analyzer to
measure a signal at 1 GHz.
4. If the 1 GHz signal is not present, replace the A19 SSLAM. Refer to
Replacing the A19 SSLAM" on page
5. If the 1 GHz signal is present and the analyzer has source step attenuators, reconnect
the cable to the A19 SSLAM and continue testing at
Source Step Attenuators (Option 1E1)" on page
6. If the 1 GHz signal is present and the analyzer does not have source step attenuators,
replace the appropriate test port coupler. Refer to
and A22 Test Port Couplers and Coupler Mounting Brackets" on page
Checking the A25 and A26 60-dB Source Step Attenuators (Option 1E1)
1. Locate the following semirigid cable at the appropriate step attenuator:
• W42 for Port 1
• W43 for Port 2
2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the step attenuator.
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 step attenuator. Refer to
"Removing and Replacing the A25 and A26 60-dB Source Step Attenuators (Option
1E1)" on page 7-30.
5. If the 1 GHz signal is present, replace the associated test port coupler. Refer to
"Removing and Replacing the A21 and A22 Test Port Couplers and Coupler Mounting
Brackets" on page
4-44
7-24.
7-28.
PNA Series Microwave Network Analyzers
"Removing and
"Checking the A25 and A26 60-dB
4-44.
"Removing and Replacing the A21
Service Guide N5230-90014
N5230A
7-28.