Spurs at EV of AD9910

Hello EveryBody

I am Testing The EV Board of AD9910,it seems i have spurs close to Carrier at 1Mhz at both sides.

for example i tune to 200Mhz and it's clean when i move to 201Mhz i get the spurs,

there are  few freqeuncies that this phenomena Happens like 150Mhz, 300Mhz and more....

Thanks

Meir