[time-nuts] Ultra low phase noise floor measurement system for RF devices.
SAIDJACK at aol.com
SAIDJACK at aol.com
Fri Mar 30 21:47:51 EDT 2007
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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