Comment by elch
5 hours ago
I guess he also believes that 50 MHz or so signals can be measured reliably on a 40 MHz (on paper at least) scope.
5 hours ago
I guess he also believes that 50 MHz or so signals can be measured reliably on a 40 MHz (on paper at least) scope.
Most digital scopes have around 5-10 times faster sampling than bandwidth. The one on pic is 250Msps.
That's more than good enough for the purpose of checking interference
But he tries to quantify this interference. Anyway Animats's comment is the one that points IMHO to the most likely cause of the observed waveforms.
https://news.ycombinator.com/item?id=47931024