Strange Oscilloscope Reading on Nano

[mojave_dean]

@Paul_KD7HB

Looking at your picture, I see you are using LED lights. Turn them all off and any fluorescent lights.
I see only ONE possible scope probe. Did you adjust the compensating capacitor as per scope instructions? You are showing two traces on the scope, but only ONE possible 10X probe in the picture. Where is the second 10X probe?

There's another probe dangling below pic.

I'll look into adjustment. This scope has a different way, and I forgot it altogether.

Will turn off LEDs.
Thanks