I am posting this again as i havent got any concrete replies.I have been stuck making the usrp work as a relay for a very long time. I am giving the code which i am using for making it work as a relay. Can somebody please point out where is the mistake. I am trying to receive a signal sent by usrp_siggen.py at 910MHz and retransmit it at 950MHz. However, when i view the signal at 950MHz using usrp_oscope.py then i am able to see only noise. There is no sine wave present at that frequency. I am not able to understand what is the usrp transmitting at 950 MHz then. What i know is that the usrp does receive the sine wave at 910MHz.