[time-nuts] Ultra low phase noise floor measurement system for RF devices.

[Dr Bruce Griffiths]

SAIDJACK at aol.com wrote:
>  
> In a message dated 3/29/2007 21:33:44 Pacific Daylight Time,  
> bruce.griffiths at xtra.co.nz writes:
>
> _http://arxiv.org/PS_cache/physics/pdf/0503/0503015.pdf_ 
> (http://arxiv.org/PS_cache/physics/pdf/0503/0503015.pdf) 
>
>
> Hi Bruce,
>  
> Isn't a -200dBc/Hz floor below the thermal noise floor that can be  achieved?
>  
> bye,
> Said
>
>
>
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Said

It does in fact measure below the thermal noise floor.
This is not too difficult as it uses a crosscorrelation technique.

Bruce