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Show us your square wave

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Howardlong:

--- Quote from: qu1j0t3 on August 14, 2017, 03:36:32 am ---
--- Quote from: LabSpokane on January 16, 2015, 09:06:23 pm ---
--- Quote from: rx8pilot on January 16, 2015, 08:29:43 pm ---This is a surprisingly interesting thread. A square wave being both hard to generate and measure at high dv/dt and frequency.

On the generator side - what do you have to spend to get a high-quality square wave. There are a million Fluke, HP, Agilent, etc on eBay. I am about to buy a 1Ghz scope and need an AWG and just a plain Function Gen (for general purpose uses like injecting noise into a circuit). Trying to learn how to understand the sources of the errors to make full use of the new scope. I have spent too much time chasing my tail on a design only to learn that my measurement was the problem, not the circuit.

--- End quote ---
The primer:
http://cp.literature.agilent.com/litweb/pdf/5989-5733EN.pdf

--- End quote ---

^ This link is now dead. LabSpokane, do you know any other sources for the document? (And what is the document?)

Thanks

--- End quote ---

Keysight rebranded version here http://literature.cdn.keysight.com/litweb/pdf/5989-5733EN.pdf

Insatman:
+5V out, battery powered reed pulser for use as a TDR, pulse calibration or just for frequency response testing.  <400ps Trise

Insatman:
Adjustable voltage/polarity version of reed pulser.  This one can output from 2V to ~130V positive or negative.  Risetime is a bit longer.  My attempt at making something like the old TEK109 for use in my home lab.

T3sl4co1l:
Hmm, it's not a coaxial relay, is it?

Tim

David Hess:
I have thought about trying to make one of those with a mercury wetted reed relay mounted coaxial inside of a brass tube or as a coplanar waveguide to make it part of the 50 ohm transmission line.  Tektronix did this sort of thing for their fastest tunnel diode pulsers.  The Tektronix 7T11 sampling sweep uses this sort of construction for its wide bandwidth trigger circuits.

But most of the high bandwidth oscilloscopes that I would use it for are analog so the low repetition rate becomes a problem.

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