The Shannon Theorem states that given a signal limited in bandwidth with the maximum harmonic fc <= 1/2 Fsample you can rebuild the original signal by interpolating :
I wanted to write it down because I found the CH1 waveform funny. Its actually pretty!
So... last week I made lot's of progress, I'm now sampling at 100 MSPS... on the above picture the horizontal resolution is 20 nsec/div...
I will post again once I fixed the sinc(x) problem!