### Network

No, although we might be able to turn a $5 garage sale TV set into a scope (Not a very *good* scope, mind you...) R #### Rocky Jan 1, 1970 0 No, although we might be able to turn a$5 garage sale TV set into a scope
(Not a very *good* scope, mind you...)

Isn't that how they make multi-channel, multi-gigahertz digital
sampling scopes? (More or less)
Some high-speed ADCs, a bit of logic and a display....

M

#### Mike

Jan 1, 1970
0
Rocky said:
Isn't that how they make multi-channel, multi-gigahertz digital
sampling scopes? (More or less)
Some high-speed ADCs, a bit of logic and a display....

That’s exactly how they do it. Start with four DC to 20GHz preamps,
split the output of each preamp to four 12.5GS/s ADCs each with a phase
shifted clock and connect each ADC to a demultiplexer driving wide
slower memory. While you are at it, take a split off your preamps and
send it to your trigger comparator chip. (When you’re at Radio Shack, be
back the acquisition memory, convert it to a raster image and send it to
your \$5 garage sale TV. Voila, you have a 20GHz, 50GS/s digital scope.

D

#### David M. Palmer

Jan 1, 1970
0
Don Lancaster said:
Can't you just tie a long rope on the oscilloscope and make a pendulum
out of it?

Or knock on the door of the building supervisor and say "I will give
you this expensive oscilloscope if you tell me what time it is."