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ADF4252 - TPC22 Phase Noise Plot

Question asked by ELADI on Mar 7, 2011
Latest reply on Mar 8, 2011 by aharney

ADF4252 TPC22 labeled “Phase Noise (Referred to CP Output) vs. PFD Frequency, IF Side” on pp. 10.  Usually the phase noise starts out high, close-in to the carrier and then decreases as you look at higher frequency offsets.  This graph shows the opposite.  It starts at -168 dBc/Hz  at 10kHz and goes to -142dBc/Hz at 1MHz.  Am I looking at this data incorrectly?

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