LMX2582: Device Configured for Frequency from 4360MHz to 5000MHz with Maximum Output power from PLL

Hi team TI,

We Required Configuration from LMX2582  IC 

Output Frequency : 4360-5000MHzz with +8dBm Output 

Input Frequency to Osc In : 100MHz with +6dBm

Fpd= 100MHz 

Output Frequency Selection : VCO for Both A & B Channels

Pre-scaler : 2 ; N Divider = 21 , Fden= 200 , Fnum= 150 to 800 (Variable)

As Per FVCO = FPD*Pre scaler (N Div+(Fnum/Fdenum) we should get output frequney 

but we are getting Output from 4360 to 4400MHz where Fnum = F denum (Upto Fnum=200) only

Is it Right ??

Can you give any suggestion 

PFA for your reference