Agilent 54831/54832 Calibration operation / circuit

[leonpav]

Hi!

Is anyone familiar with the low-level calibration operation of the Agilent 54831/54832 scopes? When calibrating, the AUX Out produces several different signals, like DC voltage for offset corrections, trigger signals, etc...

I believe my scope has a broken cal circuit, because it fails the self calibration: trigger on all channels. Vertical calibration on all 4 channels is OK. Self test also all OK.


What type of trigger signals are outputted on the AUX Out during the trigger calibration? Which ICs and circuits are used on the ACQ board for the trigger calibration?

The trigger cal errors are:
MstOsc1TuneCal
ExtOscDurPred
ExtOscDurMst

Thanks!