ADF5610 VCO Sub Band settings


I am little bit struggling to find out the correct VCO sub band for a particular frequency for ADF5610.

I am totally unable to get any frequency in autocalibration mode, though I have followed the correct sequence of register writing.

I have followed the page no. 49 of ADF5610 datasheet and got the exact (8Ghz) Frequency.

However, I have got doubt that, how the frequency 8GHz falls under sub band 205.

I want help for selecting VCO sub band for a particular frequency.

Can any expert please explain so that I can move forward with the programming issue.

Thank you