Hello all. New 2c42 owner here. I am checking my hacking options here, or if anyone noticed what I did.
I tried to test the bandwidth of my scopes and my probes with a fast pulse, and a signal generator today, and it seems mine has far more than the claimed 40MHz bandwidth, probably 70Mhz or so.
Unfortunately I find it hard to tell, as there is some overshot and ringing going on, that really seems like an interpolation problem.
Unfortunately I can't get the pure ADC data out of the scope, as the display is interpolated and there are no options to change that, and even the PC software can only extract the interpolated waveform.
I wish I could get bare sample points on screen, perhaps with a linear interpolation to see more of the measurement, and less of the guesswork, but that may be just me.
I mean perhaps I could try lowering the time/div until every extracted sample corresponds to an ADC sample, but TBH I don't trust them I can get anything out of it that is not already "manipulated". I digress.
So. Did anyone do proper bandwidth tests of the 2x42, the 2x72 and a hacked 2x42? I really can't find my 40MHz limit in device, only this, what I think is a crappy interpolation artefact.
Above the 70-100MHz range it is the sample rate that limits the system anyway.
See attached picture. Good quality 10MHz signal fed in from a 50 ohm source through an 50 ohm BNC terminated coax. Looks "perfect" on a proper high bandwidth scope.