I had not run SPC on my DPO3034 for a very long time and today i realized that it fails SPC
It fails at almost the end of the SPC run. But self tests always pass even in loops of 10 it never fails. also the scope shows signals correctly on all channels.
I ran the SPC in manufacturing mode with no difference but I can now get a slightly more meaningful error message in the error log
which unfortunately goes beyond the window
the morons who wrote the FW didn't wrap the text so that it continues on the second line instead of disappearing out of the window....
anyways, using :ERR:FIR? command from the scope's web page I can finally extract the error message as this:
846: 3 0 0 Calibrate 22:52:11 03/03/2021 CH4 NREJ comparator A 2mV/div -FAILED- 2mV Trig Hyst Rslt too hi
any ideas? any suggestions as to where I should be looking at? I believe NREJ means Noise Reject mode in Trigger setup
and the rest are pretty much self explanatory except the last two words "too hi"?
what is "too high"?I noticed that if I change down to 2mv/div or 1mv/div on all channels, CH4 has more noise (some spikes actually) than the other 3 channels
Those other 3 channels dont show spike noise. Could that be the cause?
any suggestion is appreciated