time-nuts@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.