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

[SAIDJACK at aol.com]

In a message dated 3/30/2007 19:14:31 Pacific Daylight Time,  
bruce.griffiths at xtra.co.nz writes:

With a  +13dBm carrier this corresponds to a noise voltage of 100pV/rtHz 
across a  50 ohm resistor or a noise current of 2pA/rtHz  flowing through  it.



Hi Bruce,
 
but isn't the thermal noise at room temp about 130pV/rtHz or so for a 1 ohm  
source resistor by itself?
 
Wouldn't the source resistance's thermal noise be the limiting  factor?
 
bye,
Said



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