On Fri, 10 Feb 2012 17:28:53 -0800, Chris Albertson <albertson.ch...@gmail.com> wrote:
>On Fri, Feb 10, 2012 at 5:10 PM, David <davidwh...@gmail.com> wrote: > >> All you need for this is the flip-flop. Clock the flip-flop with the >> 1 PPS signal and capture whether the oscillator is leading or lagging. > >I can see how this can detect lock. If the FF is the same each second >you are good. But if it changes how do you know the direction of the >change? It only detects if the phase difference is leading or lagging. Assuming that the frequency is locked, the FF should return a 50/50 distribution when phased locked. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
