Manual Calibration on ADF5355

Hi All,

  I am able to program ADF5355 to various frequencies and verified the programmed frequency on spectrum. The lock status can also be read-back on MUXOUT by setting reg4 MUXOUT for "Digital Lock Detect". Currently it is operated in auto calibration mode.

  I want to perform manual calibration and has refer to the following document for its procedure: https://www.analog.com/media/en/technical-documentation/application-notes/AN-1353.pdf. 

  However, i am not able to get MUXOUT high when set it for "VCO calibration complete". I tried by insert 5s delay then read-back core and band data while keeping LE high. Still there is no data (the Data line is always low) while clocking out.

  Has anyone success in doing manual calibration and can you advice?

  Is there any sample code available for me to follow along?

  Thanks.