Technical data

Service Guide N5230-90025 4-41
PNA Series Microwave Network Analyzers Troubleshooting
N5230C Measurement System Troubleshooting
2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the A19 MASSQuad.
3. Connect the spectrum analyzer to the A19 MASSQuad connector. Set the spectrum analyzer to measure
a signal at 1 GHz.
4. If the 1 GHz signal is not present, replace the A19 MASSQuad. Refer to “Removing and Replacing the
A19 MASS 26.5 (MASSQuad) and MASSQuad Mounting Block” on page 7-34.
5. If the 1 GHz signal is present, replace the A25 step attenuator. Refer to.“Removing and Replacing the A25
60-dB Source Step Attenuator” on page 7-40.
Checking the A26 60-dB Source Step Attenuator (Options 146 and 246)
1. Locate semirigid cable W79 at the output of the A26 source step attenuator.
2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the A26 step attenuator.
3. Connect the spectrum analyzer to the A26 step attenuator connector. Set the spectrum analyzer to
measure a signal at 1 GHz. Set the network analyzer for an S
33
measurement.
4. If the 1 GHz signal is not present, continue troubleshooting at “Checking the Output of the A18
MASSQuad to the A26 Source Step Attenuator (Options 146 and 246)” on page 4-41.
5. If the 1 GHz signal is present, replace the A18 MASSQuad. Refer to “Removing and Replacing the A18
MASS 26.5 (MASSQuad)” on page 7-32.
Checking the Output of the A18 MASSQuad to the A26 Source Step Attenuator (Options 146 and 246)
1. Locate semirigid cable W78 at the output of the A18 MASSQuad that goes to the input of the A26 source
step attenuator.
2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the A18 MASSQuad.
3. Connect the spectrum analyzer to the A18 MASSQuad connector. Set the spectrum analyzer to measure
a signal at 1 GHz. Set the network analyzer for an S
33
measurement.
4. If the 1 GHz signal is not present, replace the A18 MASSQuad. Refer to “Removing and Replacing the
A18 MASS 26.5 (MASSQuad)” on page 7-32.
5. If the 1 GHz signal is present, replace the A26 step attenuator. Refer to.“Removing and Replacing the A26
60-dB Source Step Attenuator” on page 7-42.