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I wish it were that simple, but that's the waveform I get in DC mode. In AC mode it looks like the attached picture. I get these forms with both inputs.
My probes shipped out today, so in the meantime I cobbled one together with a coax cable and some resistors. I did consider that it might just be an issue with not using a real probe, but I get the same waveform if I connect a wire direct from the input to the calibration point or if I connect a 10K resistor from the input to same. Could not having a real probe be what's throwing it off that bad?
I apologize for my ignorance. I would prefer to teach myself and not have to bother anyone about it, but I thought someone might recognize this slope where there should be a plateau issue, saving me from poking around trying to find the right thing to adjust or having to shell out 40 bucks for the service guide.
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