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Show us your square wave

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T3sl4co1l:
Both look about like what you'd expect from a mismatched transmission line of that length.

Tim

TunerSandwich:
So do I win for the worst square wave possible?  Someone told me that was the point of this thread, back on page 11 or 10 ( :-//)

LabSpokane:
You win the prize. Absolutely no doubt about that.  ::)

Pjotr:
A 45 years old article about probing:
http://www.ece.vt.edu/cel/docs/TekProbeCircuits.pdf

Also worth reading this Agilent app note:
http://cp.literature.agilent.com/litweb/pdf/5990-8371EN.pdf

Maybe it becomes clear why el cheapo Chinese probes supplied with the lower end DSO's are not the ones to get most out of what these scopes are capable of regarding pulse response. And sometimes "lie" a bit.

joeqsmith:
Pulse output feeding the two  "T"s back to back to from an "H"   One  output of the H drives the scopes input.  The remaining two have a fair amount of coax forming a loop.    Normally used for benchmarking the DSO, in this case shows how power is split between the loop and the DSO's input.  Once the power from the loop shows up, the voltage is doubled.     If the loop were long enough, you would see a second pulse (with VERY low phase noise compared with the exciter pulse.   



Nice Agilent scope Hugoneus!   

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