[time-nuts] 20logN was Re: phase noise questions (long)

Bruce Griffiths bruce.griffiths at xtra.co.nz
Fri Jan 25 16:59:31 EST 2008

The following paper details a method used by NIST for PM and AM noise
measurement system calibration.


An accuracy of 0.14dB or better is possible.
Unlike the beat frequency method a phase detector with a sinusoidal
response isnt required.
The effect of the PLL is also accounted for, this is particularly
important at low frequency offsets.


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