Ernest,
I recommend working through the
https://wiki.gnuradio.org/index.php/Tutorials, and then when you get to
the
https://wiki.gnuradio.org/index.php/Simulation_example:_AM_transmitter_and_receiver
you could adapt it to using your USRP in place of the ZMQ sockets.
If you need additional help, let me know. (I wrote the tutorial.)
--
Barry Duggan KV4FV
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