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Show us your square wave

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ADT123:
Heard a colleague say "now that's a fast edge"



amspire:
ADT123,

was that sampling scopes one of your projects? Having a go at building a sampling scope has always been something I have wanted to try. The principles are so simple, but I am sure it took a massive effort to get that 25MHz bandwidth. The waveform really is amazingly clean.

Historically, this is the technology that allowed scopes to be built with GHz bandwidths when scope mainframes were struggling to reach even 1 MHz bandwidth.

A pity the price is so out of reach of the hobbyist. I have always thought this is potentially a very cheap technology if the market was big enough - maybe not for 25GHz, but 5GHz bandwidth would be pretty good. 

Am I delusional?  :)

Richard.

WackyGerman:
Here are my results of measuring a 10 MHz squarewave from my Siglent SDG1010 with three different bnc cables .

MrW0lf:
I know nothing about tech side... but as a concept, maybe it is possible to hack analog frontend of cheap USB scope having ETS? For example ~100EUR Pico 2204A has 2GSa/s ETS listed. Logically software is there, timing stuff is there...

Electro Fan:

--- Quote from: ADT123 on April 28, 2017, 08:24:07 am ---Heard a colleague say "now that's a fast edge"



--- End quote ---

That looks like a fast rise time but to keep things apples to apples most of the measurements here have been at 10% and 90% rather than 20% and 80%.

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