Fluctuating gain in flex1800?

Dear All,

I am sampling a CW (1766.6MHz) using an flexrf1800. The amplitude seems
to
fluctuate 0.3dB (peak-to-peak). It don’t think it is due to measurement
noise because the SNR is high. Is this behaviour normal or am I likely
doing
something wrong ?

Could it be the signal from the D/A converter (which controlling the
gain of
the RX chain) that is noisy ?

BR/
Per Z.

The problem was eliminated by closing the USRP box. Sorry for bothering.

BR/
Per