Hello,
My HP 33120A has an issue. The output amplitude is limited to 2.8V AC RMS, on the sine wave option, and the output amplitude is always at a known offset:
Setting the output voltage to 100mV RMS, the output is 80mV RMS
SET 200mV RMS = OUT 160mV RMS
SET 300mV RMS = OUT 240mV RMS
and so on, up to 2.8V RMS maximum. 20mV*range offset.
The AMP_OUT pin at the highest set voltage corresponds to the output voltage (2.8V AC at both), which means it's something before the attenuation.
I'd like to get any insight into fixing this function generator.
Thanks!