seekconfessor
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I am using a spectrum analyzer to measure a PLL's output normalized phase noise L(f); My measurement method is Direct Spectrum Measurement and the spectrum analyzer is set: RBW=1KHz, detector=average; On L(f) calculation, Stanley_J._Goldman's book "Phase-Locked Loop Engineering Handbook for Integrated Circuits" introduced one way as the attached picture show. While, some Agilent spectrum analyzer manual books say, the phase noise under test should be: L(fm)=P(fm)-Pc-10*log10(RBW)+2.5; I am wondering which one is correct for phase noise test. Thanks.
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