Pocket 100MHZ?? oscilloscope part2 - theory and speculation

Описание: Teardown, evaluation, theory, and speculation about an odd little portable '100MHz', single channel oscilloscope. I saw it and had to grab one to peak under the hood. Spoiler alert: there is some strange stuff going on... I broke the vid up into 3 since it was stupidly long, but I wanted to shoehorn some theory in there, and add some speculation.

Here is DAAAAAAAAVE's vid about the same scope    • EEVblog #1260 - $70 100MHz Oscilloscope?  

And if you end up being interested after watching all 3 vids...
FNIRSI 5012h Oscilloscope https://amzn.to/2XfwWI5

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