[time-nuts] RFX GPSDO - Anybody played with one of these?

Jim Lux jimlux at earthlink.net
Tue Oct 2 22:37:32 EDT 2012


On 10/2/12 2:36 PM, SAIDJACK at aol.com wrote:
> Hello Paul,
>
> thanks much for the feedback!
>
> Yes, we think we have identified a nice combination of oscillators, GPS,
> and firmware that seems to work pretty well. The GPSTCXO units cannot be
> compared to a lower cost $150 Thunderbolt in terms of phase noise or  stability
> of course, and they have CMOS 10MHz outputs, but then the  TB's cost around
> $1500 new I guess.
>
> We think the GPSTCXO's and LC_XO type units will work quite well  wherever
> standard OCXO's are used today, and power/size/weight are an  issue.
>


Intriguing.. Can it handle the Doppler, etc., for a cubesat in LEO? 
(7km/s)  The total Doppler isn't usually the issue (the GPS satellites 
are moving faster, after all), but the receiver may not work for high 
velocities, high altitudes?







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