[time-nuts] Best counter setting for ADEV?

[Jim Lux]

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.