Why AD9375 appear signal tone 2950Mhz noise although I disable output TX, RX enable?

Hi,

I'm using AD9375. Once I enable output power with signal tone sine at any frequency  or  even I disable tx, rx enable. I still see signal tone sine 2950Mhz on spectrum. Because, My system have attenuation 40dbm, So in fact, power signal is about -60dbm as image and affect into receiver sensitivity at 2950Mhz

How to avoid or kill signal 2950MHZ?

Thanks.