98 E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Troubleshooting Assembly–Level Problems
2400 Power Supply Test
— If the +15V and –15V power supplies are good in the above table, replace
the A38 Lowband Filter.
2401 RF Path Test
1. Remove the A38 Lowband Filter and insert a semi–rigid extender cable
into J3.
2. Connect the extender cable to a spectrum analyzer.
3. Tune the spectrum analyzer and signal generator to 2 GHz. Turn on the
signal generator’s RF.
4. You should see a high power signal (>+20 dBm) at 2 GHz on the spectrum
analyzer.
— If the signal is good, replace the A38 Lowband Filter.
— If the signal is troubleshoot the RF path.
2402 Lowband Amp/Filter Power Supply
— Replace the A38 Lowband Filter.
2403 RF Path
— Replace the A38 Lowband Filter.
Self–Tests 25xx: A43 Amp Filter Self–Test Errors
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