hi Feras..
as per diagram your in the middle at 2.6GHz of your RF spectrum peak is shooting above 50 dBm i seem to clipped .. use pan option in the spectrum graph drag it so that highest peak value can be analyzed ..and thn check the max value of spectrum power in the middle .. carrier analyzer give Max power level .. i hope you will get same result.. if this is npt the case i mean power level not clipped the the graph.. check the your are visualizing what type of signal .. i mean .. only singal , singal + Noise or paratmeterized signal… hope you are getting what i want mean to say..
regards