Usrp

i am trying to send and receive a file using one USRP with one Basic Tx
and one Basic Rx connected by SMA cable

i ve been trying to do that using loopback example in the examples and
what happen is that a file with the name loopback will be created even
if the Basic Rx is not connected

all what i want to do is to figure out how to be able to connect the Rx
to Tx and receive what i ve sent to check for errors in transmission

i am also a newbie to gnuradio so i may not understand technical issues
easily

My USRP is rev 4.2 and i am using ubuntu 9.04
i hope some one can help me because i need a reply ASAP and thanx for
the help in advance

Use the benchmark_tx.py and benchmark_rx.py examples instead of the
loopback which is intended for only a single side.

Tim