[time-nuts] Designing and building an OCXO and GPSDO

[Luis Cupido]

Bruce,
John,
...

And at smaller offsets like 100Hz and less ?
Shouldn't the improvement be even bigger ?
Closer to the carrier we are dealing with bigger signals
so the ADC issues like resolution should be less important,
and the limiting factor should really be the the
phase noise of the LO's and etc.
Am I right ?


Luis Cupido.
ct1dmk.



Bruce Griffiths wrote:

> Luis
> 
> The R+S FMU36 has a phase noise floor of around -143dBc/Hz (offset > 
> 10kHz) with a 10MHz input.
> Whereas the R+S FSU67 has a phase noise floor of around -133dBcdBc/Hz 
> (offset = 10kHz) with a 640Mhz input.
> 
> There is a definite improvement at lower frequencies but not quite as 
> much as one might have expected.
> 
> Bruce
> 
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