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unstability of the output frequency of ADF5355

Question asked by Radwan on Mar 12, 2018


I designed my own board around ADF5355, depending on the evalution board EV-ADF5355SD1Z.

When observing the output of the ADF5355, we found that the frequency is mostly unstable and change slowly with time, as depicated by attached video.

I thing the problen related with TCXO I used, "fox924b 20MHz"

If my analysis  is right, what is optimal TCXO shoud I use.

Thank you in advances.

Best regards