Troubleshooting Performance Test Problems - Keysight Technologies E8257D Service Manual

Troubleshooting

Troubleshooting Performance Test Problems

Troubleshooting Performance Test Problems
If a performance test fails and all self–tests pass, use the following to find the
most likely failure:
Performance test that is failing...
Maximum Leveled Output Power
Power Level Accuracy
Internal Pulse Modulation Level Accuracy
Internal Pulse Modulation Rise/Fall Time
Internal Pulse Modulation Minimum Pulse Width
DC FM Carrier Offset
External AM Frequency Response
Internal FM Frequency Response
External Phase Modulation Frequency Response Perform FM adjustments.
Internal FM Distortion
Internal Phase Modulation Distortion
External FM Deviation Accuracy
External Phase Modulation Deviation Accuracy
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Action to perform...
Refer to "Troubleshooting the RF Path" on page
Perform
Power Flatness Calibration,
Attenuator Calibration–Lowband and Highband Power,
Attenuator Calibration–Highband and High Power,
Attenuator Calibration–Lowband and Low Power, and
Attenuator Calibration–Highband and Low Power.
If the frequency ≤3.2 GHz, check the
A11 Pulse/Analog Modulation Generator or the A8 Output.
If the frequency is >3.2 GHz, check
A11 Pulse/Analog Modulation Generator and the A10 ALC.
If the Internal Pulse Modulation Minimum Pulse Width test fails,
perform a Pulse Width Calibration prior to replacing any assembly.
Perform DC FM Calibration.
If still failing, check A11 Pulse/Analog Modulation Generator and A6 Frac–N.
If the frequency is ≤3.2 GHz, check the
A11 Pulse/Analog Modulation Generator or the A8 Output.
If the frequency is >3.2 GHz, check the
A11 Pulse/Analog Modulation Generator and the A10 ALC.
Perform FM adjustments.
If still failing check A11 Pulse/Analog Modulation Generator and A6 Frac–N.
If still failing check A11 Pulse/Analog Modulation Generator and A6 Frac–N.
Perform FM adjustments.
If still failing check A11 Pulse/Analog Modulation Generator and A6 Frac–N.
Perform FM adjustments.
If still failing check A11 Pulse/Analog Modulation Generator and A6 Frac–N.
Perform FM adjustments.
If still failing check A11 Pulse/Analog Modulation Generator and A6 Frac–N.
Perform FM adjustments.
If still failing check A11 Pulse/Analog Modulation Generator and A6 Frac–N.
E8257D/67D, E8663D PSG Signal Generators Service Guide
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