I was surprised that it seams to go to zero.
My now deceased neighbor used to make remark when ever given the chance that when florescent lights were introduce to machine shops injuries happened because people were fooled about the machine’s motion. He says that the early generations lights were bad for that. That had me thinking the effect was reduced. To see the ADC measured value go to zero was a surprise.
But I know that when I watch the teeth on my table saw blade spin down it strobes backwards and forward. Hum. I should put a sharpie mark or three on my blades come to think of it.
I also see a distortion at the positive peaks that I also did not expect.