[time-nuts] First success with very simple, very low cost GPSDO
Hal Murray
hmurray at megapathdsl.net
Thu Apr 10 17:32:29 EDT 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.
--
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