[time-nuts] First success with very simple, very low cost GPSDO

Hal Murray hmurray at megapathdsl.net
Thu Apr 10 21:32:29 UTC 2014

kd0gls at mninter.net said:
> Precisely my point. My oscillator's tuning range and the timer frequency and
> the sampling interval dictated the minimum number of timer bits needed. In
> my case, as I recall, eight was not enough. Once locked, yes, but not
> initially.

I googled for >TCXO tuning-range< and looked at a few data sheets.  Several 
had a tuning range under 10 ppm and a few were over, up to 20 ppm.

What type of oscillator are you using?  Relative to half-way, where does it 
settle out?

Is the problem really tuning range?  I wouldn't be surprised with a 
stability/capture issue.

These are my opinions.  I hate spam.

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