[time-nuts] Jupiter modules: 1pps or 10kHz to lock an OCXO ?
hmurray at megapathdsl.net
Mon Dec 22 02:01:08 UTC 2008
> I don't know of an analog approach using the 1 pps divided to 0.5 Hz
> (for 50% duty cycle) as input to a phase detector. 1 Hz ripple
> frequency from the phase detector is probably not practical to
> filter. You would need a low pass filter time constant of at least
> 1000 seconds and I think capacitors that will work for the long time
> constant will have poor temperature properties, leading to excess
Has anybody considered putting that stuff into an oven?
I wonder if it would be practical to take apart the ovenized osc you are
trying to control and put the cap inside at the right place in the existing
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