[time-nuts] Another "atomic" clock question

Mike M timenuts at binsamp.e4ward.com
Wed Mar 5 09:53:04 EST 2014

Bob Camp wrote:

> Hi

> Be careful of what you wish for.

> One way to eliminate the hanging bridge is to have  the oscillator
> exactly on  frequency. That sounds fine. The problem  is  that you
> are always in the middle of a bridge.

> Bob

That's fine.  Just  set  the oscillator to keep  the  bridge  in the
middle of  the  range. It should be possible to  detect  the correct
frequency and phase by monitoring the sawtooth correction  data from
the GPS.

Now you have eliminated the sawtooth error and no longer have to add
correction for it.

This will  eliminate   the   quantization   error   in  the sawtooth
correction data  since it is no longer needed. If the  1pps  loop is
properly designed,  it  should help the loop track  the  1pps signal
more accurately.


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