[sdiy] Old 20Mhz scope high on LSD!!

[TIm Daugard]

I have a Y input to my scope. I have an RF signal source. When my wife lets me
back into my work shed, I will connect the two and see at what frequency the
scope stops deflecting. This should at least give me an indication of the speed
I can run for horizontal.

Thinking RF - The 3db point of my scope is 5Mhz (I know, old - but still useable
for audio and some RF) I should be able to upgrade the signal path.

As far as creating a digital front end for a scope, the problem would be the ADC
and the memory following it. If you assume 50 nS memory ICs, you are limited to
20 MHz bandwidth. If you interleave memories, you can get to 40 MHz.

. . . and of the subject, what does everyone prefer? ac or AC, dc or DC. Don't
answer with the official SI unit is . . . I know what it is. I'm asking
preferences.

Tim Daugard
AG4GZ 30.4078N 86.6227W
http://home.sprintmail.com/~daugard/synth.htm