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What is the frequency resolution of the ADF4351?


Tobby
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Hi, there.

Use the 25 MHz reference frequency that comes with the ADF4351 evaluation board, and the output frequency is 1422 MHz. The parameter design is shown in the figure below:

image.png.381f75941d4ed29f86c2a085c0235f75.png

Using the output frequency of the spectrum analyzer, Span is set to 100 Hz, VBW and RBW are automatically set, and the frequency is found to randomly jump within a range of tens of Hz near 1422 MHz.

Excuse me, what is the frequency resolution of the ADF4351? Can the ADF4355-3 solve the problem?

Thanks for the answer.

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