[time-nuts] GPSDO - probably a stupid question.

Pete Stephenson pete at heypete.com
Wed Aug 17 03:30:40 EDT 2016

On Aug 17, 2016 09:04, "Peter Reilley" <preilley_454 at comcast.net> wrote:
> As a neophyte, I was wondering: rather that trying to discipline an
> oscillator to create a GPSDO and produce a precise 10 MHz why not
discipline the oscillator
> of the GPS receiver itself?   This could be done with a varactor diode
across crystal of the
> receiver's oscillator.   Of course there are the same problems with
trying to servo this
> oscillator as there are trying to servo an external oscillator but there
are fewer parts.

It's a very good idea, and is precisely what the Trimble Thunderbolt does
with its 10MHz OCXO that it uses both as a system clock and a 10MHz output.


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