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Filtering and phase noise

Question asked by HankZ on Nov 23, 2015
Latest reply on Nov 23, 2015 by LouijieC

For the graph below at 123 Mhz (closest to my VHF frequency of 72 & 85 Mhz),  shouldn’t I be able to get the phase noise even lower than what you show in the graph by using a higher order LC filter? Also, what do they recommend for an output LC filter (microstrip LC, discrete LC, SAW, Crystal filter, other)?