Low-Cost USB Oscilloscope

[Jerson]

Qualified engineers like; Melanie & Jerson should have little difficulty in answering this.

Trent,

I got into this thread a little too late. However, I do not understand the question you're asking here.
BTW : I have used a Parallax USB based scope in one of my designs and more recently a Velleman scope. Their bandwidth was stated to be 20MHz, but the highest frequency we could reasonably see would be around 100KHz IIRC. Its been a while since I did this, so my information may be of the mark. The 20Msamples/sec happened to be the sample rate. 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. However, the low cost PC scopes that I have used did not seem to have this feature and just took snapshots.
This seemed to be the pattern for acquisition
Pre Samples -> Trigger -> Samples -> Ready is signalled -> display is refreshed -> repeat the cycle