[time-nuts] TCVCXO Adjustment
Hal Murray
hmurray at megapathdsl.net
Sat Apr 14 20:03:26 UTC 2018
kb8tq at n1k.org said:
> The gotcha is that you do not have a calibrated adjustment. Put another way,
> there isnât a perfect correlation between DAC bits and ppm. Each adjustment
> you make is subject to a bit of error. When you are trying to get within a
> ppm, your measurements are quicker, so the larger error ( percentage of
> step) may not be as big a deal. When you get close, it is likely to become a
> big deal.
Interesting. Thanks.
How much does it vary from unit to unit? How non-linear is it likely to be?
How much does it change with temperature?
Anybody have data?
Are fancy OCXOs more linear?
--
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