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

[SAIDJACK at aol.com]

In a message dated 3/30/2007 16:02:15 Pacific Daylight Time,  
bruce.griffiths at xtra.co.nz writes:

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

Bruce



Hi Bruce,
 
interesting how microphonic effects would affect the results.
 
I see my instrumentation jumping by several 1E-12 units everytime I walk  
into the lab since my benches are not shock insulated.
 
At -200dBc (we have to think about that number for a while!!) - that's  
counting single electrons every couple of seconds I would think...
 
bye,
Said



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