How to send signal from second RF on USRP N200/N210?

Apparently Matlab have very limited support for USRP devices, while I am able to use second RF port of N200/N210 on GNURadio or Labview, on Matlab I cannot find a way to use that second RF port. How can I do it?

[Jaya Srivastava]

Second RX port is just for receiving. It cannot be used to transmit signal. You can use only the first RX port as both transmitter and receiver.

Answer 1

[Ethem]

MATLAB supports reception on the Rx port and transmission on Tx/Rx port. Can you explain your system a little more?