Benchmark_rx.py and benchmark_tx.py with 1 USRP board

Hi, I apologize if this has been asked and answered already, but I’m
trying transmit and receive data using the benchmark_rx.py and the
benchmark_tx.py programs from just 1 USRP board on one computer. Is
this possible?

I have two RX900 daughterboards. I put one on the RXA side of the USRP
and the other on the RXB side, ran the benchmark_rx.py code on one
terminal and then subsequently ran the benchmark_tx.py code on another
terminal. Here is what I entered in each terminal:

python benchmark_rx.py -f 1e9 -m dqpsk -r 1e6 -R B -v

python benchmark_tx.py -f 1e9 -m dqpsk -r 1e6 -M 6 -TA -v

However, while I should be receiving the packet numbers being
transmitted, I’m getting a repeated u0u0 sequence, which I believe is a
buffer overrun. Two separate USRPs will likely fix this problem,
however, at this moment, I only have one.

Do you guys know of a way to possibly modify the Python code such that
data can be transmitted and received using just 1 USRP? Will adjusting
the decimation or interpolation rates make any difference? Any help
would be greatly appreciated!

Thanks,
Thomas Chan