Agilent Technologies Agilent 33500 Series

Self-TestProcedures
Error Message and Meaning Probable Cause
650 Self-test failed; Chan n, 0dB path failure expected 0dB, measured value
dB
Straight-through path (no attenuator) from waveform DAC to ADC input pro-
ducing output outside expected range. If this fails, extended attenuator test 655
is not executed.
Main Board
655 Self-test failed; Chan n, -8 dB pre attenuator path too low (too high)
Self-test failed; Chan n, -16 dB pre attenuator path too low (too high)
Self-test failed; Chan n, -24 dB pre attenuator path too low (too high)
Self-test failed; Chan n, -24 dB post attenuator path too low (too high)
Specified attenuator relay malfunctioning, or associated circuitry not providing
expected attenuation.
Main Board
Agilent 33500 Series Operating and Service Guide 419