[GPS_Standard] Interesting paper

[Graham]

All:

Make sure that you understand that all frequencies he is referencing
are multiplied by 250, so when he says the "ZAZ" GPSDO is off by
a constant 2.7 Hz, he means multiplied to 2500 MHz, which corresponds
to an error of 0.0108 Hz at 10 MHz.

This also brings up a question of whether the "ZAZ" GPSDO is frequency
locked or phase locked.  If the software does not zero-out the frequency
counter register, but keeps adding to the "rolled-over" counter, (which is
what I think it does, at least that is what the version I built does) 
then the
behavior is closer to a phase lock loop than a frequency locked loop, but
not exactly equivalent to a phase lock loop.  Any phase errors will be
accumulated, and will still drive the correction loop.

--- Graham / KE9H

==

On 11/18/2013 10:01 AM, Zack Widup wrote:
> I just came across this:
>
> http://www.g4jnt.com/10MHz_Reference_Source_Stability.pdf
>
> He analyzes the VE2ZAZ standard as the last one in the paper.
>
> 73, Zack W9SZ
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