On Sun, 23 Dec 2018 22:54:20 -0600 John Hasler <jhas...@newsguy.com> wrote:
> rhkramer writes: > > Yeah, but I wasn't thinking about actually using a CRT to display > > the signal in real time, but, instead, collect samples (at maybe 4 > > GHz??), store them, and then display them as a static display. > > At that sort of frequency sampling scopes (including the old crt ones) > sample at far below the signal repitition rate. Yes, they rely on the signal being repetitive. To see a single transient, you want at least five samples in the relevant period, preferably more. There is normally a real Nyquist bandwidth quoted somewhere in the small print. I used to repair and calibrate Hitachi scopes for a while, until everyone stopped using them. -- Joe
