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output frequency jitter of ADF4351

Question asked by xubing on Dec 29, 2015
Latest reply on Jan 4, 2016 by rbrennan

Problem description:

The 25 MHz reference frequency on the evaluation board EVAL-ADF4351EB1Z  was used to generate a 1422 MHz frequency, and the parameter settings are shown in the figure below.

图像 1.png

A R&S spectrum analyzer was used to test the output frequency, and the Span was set as 100 Hz。I found that a jitter of dozens of Hertz existed around the center frequency 1422 MHz。So, what does the frequency resolution of ADF4351? If I use ADF4355-3, this problem could be addressed? Thanks very much!