Hello,
I have newly acquired a used LC574AM, but it seems there is a problem in channel 4. When I connect to the cal signal and press Auto Setup, a message appears in red CL_match_gains_or_offsets: 4,8.
The displayed trace shows noise only when Volts/Div is lower or equal 0.2V.
Any clue where to look? the instrument had manual Reset a number of times but still the problem shown. The other 3 channels are ok.
Please see the attached images, last image is when zoomed
Thanks in advance!
George