[time-nuts] GPS discipline oscillator vs phase lock

Hal Murray hmurray at megapathdsl.net
Sat Jun 17 02:32:09 EDT 2017

time-nuts at febo.com said:
> Not too surprising to read locking two crystal oscillators together without
> using a physical cable is difficult to impossible.  Essentially what I am
> looking for is the phase alignment accuracy (and phase noise) one would get
> PLL’ing one oscillator to the other using a cable, but over a longer
> distance.

Have you investigated getting a fiber connection?

I think you said the target distance was a mile.  That's easy for a fiber 
without any repeaters.  If you (try to) get the fiber from the local giant 
telephone company, they will probably run to the CO and back to the other 
site because that's the way they do things.  You might get through to 
somebody who will understand and cooperate.

Maybe you have a cooperative municipality or small telco or a site out in the 
woods where you can run your own fiber.  Or...

I didn't say it would be cheap.

You can prototype it in the lab.

These are my opinions.  I hate spam.

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