Thanks a lot for your reply.
In fact, in order to respect the band range frequency of the SBX daughterboard Rev 5.1.
I sent an FM signal from a signal generator called NI PXIe-5673 described in this link:
So that I created my proper FM station on 900 MHz to respect the band range frequency allowed by SBX daughterboard Rev 5.1.
In order to receive the signal generated by usrp e110, I implemented an FM receiver flow graph on usrp e110 which is attached below
and I used an VERT900 Antenna, described in this link: https://www.ettus.com/product/details/VERT900 .
But I still have noise generated by usrp e110.
Have you an idea if there is a non suitable parameter on the flow graph ?
Thanks in advance