Hello Ke, No USRP can be controlled by more than one program at a time. Once a USRP has been claimed by a program others cannot access it. If you want to test both receive and transmit at the same time you will need to write your own program combining, for example, the benchmark programs, into one program using one multi-usrp object to access the USRP.
Regards, Derek On Wed, Feb 10, 2016 at 8:37 AM, kerry <[email protected]> wrote: > Hi,all: > I am trying to transmit something and receive it back using the same USRP > N210 device. > However it fails, or I did not do it correctly. > > I run the receiver first use below command: > > sudo ./benchmark_rx.py -f 2.45M > > Then I run the transmitter use below command: > > sudo ./benchmark_tx.py -f 2.45G > > The transmitter back "............................." > > But the receiver gives me: > TIMEOUT > > I changed the frequency also did not work. > > What can cause this? > Is this a hardware problem? > I use SBX dboard. I think it can both receive and transmit at the same > time. > Or maybe my incorrect operation？ > > Thanks， > Ke > > > > > -- > View this message in context: > http://gnuradio.4.n7.nabble.com/Questions-about-transmit-and-receive-with-USRP-N210-GNU-3-6-5-use-SBX-dboard-tp58121.html > Sent from the GnuRadio mailing list archive at Nabble.com. > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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