[time-nuts] GPS and Rubidium frequency standards and noise question (new...

[Javier Herrero]

Hello,

El 03/06/2012 10:46, SAIDJACK at aol.com escribió:
>
> The FEI-5680A Rubidium that we discussed here some time ago has a much
> worse phase noise plot of course, because the 10MHz is generated digitally
> through a DDS, not a 10MHz crystal oscillator..
>
There is a version that generates 10MHz directly through DDS, but the 
particular version we recently discussed a lot about generates the 10MHz 
signal from a 60MHz oscillator, and the DDS is used for generating the 
~5.3125MHz signal for mixing with the 114th harmonic of the 60MHz to 
obtain the Rb resonance frequency.

I don't remember if someone did a comparison in PN performance between 
the two FE-5680A flavours.

Regards,

Javier