Yes it is (Canada, ~110VAC)
Yeah, I noticed the uneven edge times when I was doing my mechanical testing.
Off the top of my head, I was planning on waiting for a first signal and watch...
Do you have any Switch Mode Power Supplies, either 5Volts or other?
The noise might be because of that. If it is on a specific pattern and rate then something else cause this. Either clock,...
would your mains power be at 60Hz ?
hint 16.667mS
the A B debounce looks very uneven between rising and falling edges. the unequal phase shifts so introduced will make R.E data interpretation...
Before compensating, the probes had a slight up-tick/down-tick when changing edge:
https://i.imgur.com/Db9URoS.jpg
That is now gone, so I must have done something right:
...
So I finally got around to compensate each probe (in their colour-coded connector, just in case that matters). Also auto-calibrated the scope; very straight-forward.
Before/after compensating:
...
Re: Vevor SDS1104 4 channel scope
ARGH.... I finally found out what is that regular noise, the probes reset to AC coupling. I haven't looked in the manual yet if there's a way to save the current setting as Default.
Demon Today, 03:15...