[time-nuts] Close-in phase noise measurements
Bruce Griffiths
bruce.griffiths at xtra.co.nz
Wed Mar 26 00:21:55 UTC 2008
Shane wrote:
> Wenzel has a setup you can purchase at low cost.
>
> http://www.wenzel.com/pdffiles1/PNTS%201000/BP-1000-SC.pdf
>
> Phase noise test sets can be pricey... $200K
>
Shane
Their calibration method is somewhat problematic at the low frequency
end where the effect of the PLL and the audio amplifier low frequency
cutoff may be significant.
The NIST calibration technique:
http://tf.nist.gov/timefreq/general/pdf/1000.pdf is far superior.
Bruce
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