Sending a signal to a USRP N200

Good morning

I'm Isaac. I am trying to discover what is happening with my USRP N200. I'm sending a signal of 100mVpp and 1MHz from a signal generator to channel RF 2 of my USRP N200 but I receive a 0v signal and a constant -230db (if I see it in a FFT block).

I'm not sure if the USRP is failing or my flowgraph. I will appreciate any help or comment.

Regards

Isaac T.