[time-nuts] Best counter setting for ADEV?

shalimr9 at gmail.com shalimr9 at gmail.com
Wed Oct 3 12:46:12 UTC 2012


Of course, that only works when you actually need a GPSDO, but what is the point of a GPS timing receiver if not to discipline a high quality oscillator?

Didier KO4BB

Sent from my Droid Razr 4G LTE wireless tracker.



-----Original Message-----
From: Jim Lux <jimlux at earthlink.net>
To: time-nuts at febo.com
Sent: Tue, 02 Oct 2012 9:34 PM
Subject: Re: [time-nuts] Best counter setting for ADEV?

On 10/2/12 7:00 PM, shalimr9 at gmail.com wrote:
> The Thunderbolt is a special case that does not provide sawtooth correction because it does not need it.
>
> It uses the OCXO as the clock for the processor while disciplining it to GPS so there is no nominal timing error between where the 1PPS is versus where it should be.
>
> The processor is able to bring the PPS edge exactly where it wants it, instead of the typical 25 to 40 ns granularity of most other GPS receivers that operate on a separate clock.
>
> Pretty simple and elegant solution.
>


But it does depend on having a good oscillator that can be shoved 
around.  That costs money and power.


_______________________________________________
time-nuts mailing list -- time-nuts at febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.



More information about the Time-nuts_lists.febo.com mailing list