Phase noise of ADF4360-1 Evaluation Board

I was evaluating ADF4360-1 using evaluation board EVAL- ADF4360-1EBZ with evaluation software. But results are not as expected.

The phase noise is very poor as compared to datasheet and the noise floor is going up.

Tested settings and measured result is attached.

What could be the problem? Or Do I need to change some settings?

Thanks and Regards