Maybe the empeg is noisy. I would think it is though. Very hard to tell unless you have another CRO nearby to compare with.
It's probably just circuit noise in the empeg. But perhaps you have a fast enough scope to take a similar sample there?
The CAS line photos from earlier in this thread, didn't show an excess of noise -- just obvious ringing on those. But still.. now you've got me wondering about things.
So I clipped the ground clip onto the probe end, which should result in a rather quiet signal, and still saw noise.
Pretty much identical to the noise background that is present when no probes are connected, shown below. It's about a full vertical div of random noise at the highest vertical resolution, which is 10mV/div for 1:1 probes, or 100mV/div for 10:1 probes.
I don't have another scope to compare with here. Is this worth fretting about? (10mV/div x 10ns/div).
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