[time-nuts] A new take on the all-hardware GPSDO concept

Hal Murray hmurray at megapathdsl.net
Mon Sep 12 21:21:57 EDT 2016

csteinmetz at yandex.com said:
> The fact that one thing is phase-locked to another does not necessarily
> mean it puts out a good, clean signal.  At short time scales (tau less  than
> ~100 seconds), the PPS signal from any GPS receiver is noisy.  At  tau =
> 1second, it is shockingly noisy (~5e-9), and it decreases by a  nominal
> factor of 10 per decade as the averaging time (tau) is made  longer.  By tau
> = 1000 seconds, it is pretty respectable (~2e-12 if the  GPS rx designers
> did their job well). 

and then there are hanging bridges.  :)

These are my opinions.  I hate spam.

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