Pocket 100MHZ oscilloscope?? part1 - intro and teardown

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?  

EDIT: cpassuel has pointed out in a comment that some clever people ARE INDEED working on getting this gizmo more workable. They are still in the initial stages, but you can check the progress here: https://www.eevblog.com/forum/project...

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

My contribution links:

MONTHLY SUBSCRIPTION:
  / alexkenis  

ONE-TIME CONTRIBUTION:
https://PayPal.me/AlexKenis

AFFILIATE LINK:
USA
https://www.amazon.com/?tag=alexkenis...
https://amzn.to/2luhMQr

UK
https://www.amazon.co.uk/?tag=alexken...
https://amzn.to/2jUoKxT

Germany
https://www.amazon.de/?tag=alexkeniso...

Canada
https://www.amazon.ca/?tag=alexkeniso...
https://amzn.to/2luivRF

Background music by my band Solamors, you can contribute by buying a copy on bandcamp.com, or iTunes, Google Play, etc etc:
https://solamors.bandcamp.com
https://aletheian.bandcamp.com

PRODUCTS and blog:
AlexKenis.com (redirects to my blog at the moment)