Low-Cost USB Oscilloscope

[T.Jackson]

Trent,

I got into this thread a little too late. However, I do not understand the question you're asking here. For repetitive signals, it becomes easy to reconstruct the waveform with higher resolution by staggering the sample points wrt the zero crossing of the waveform.

BitScope manages to pull off measuring one shot events @ 20MHz with only 40M samples. See; http://www.bitscope.com/design/

So, I guess this is ultimately my question; how do they do it? How in the world can a complex waveform be captured at 20MHz with only 40M samples?

Bitscope can measure a sinusoidal waveform well & truly beyond its sampling rate. Apparently, the waveform is actually all there as far as the ADC & software is concerned. This leaves me with a lot of question & much confusion.