[time-nuts] Performance verification for time counters
leo at leobodnar.com
Fri Dec 1 16:10:55 EST 2017
Poul-Henning, Magnus, et al. thanks for your suggestions - they were not in vain.
As promised, I started setting up dual asynchronous sources experiment and performed a quick sanity check.
What I have [unsurprisingly] found is that at this level controlled environment is a problem in itself.
For example, undoing input signal SMA connector by one turn shifted my results by around 3.5ps - close to expected figure but still inconvenient.
I'll have to plan the setup before I build and validate it, otherwise the results are not trustworthy.
I hope this message makes it to the list - my previous one didn't. I am staying off the list for now.
P.S. I do know about torque wrenches.
On 29 Nov 2017, at 21:51, Poul-Henning Kamp wrote:
> Lock it to the same frequency as your reference signal, but set it
> for pure sine output slightly offset in frequency (10.000010/9.999990
> MHz), so that your know your TI sweeps the entire window.
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