On Mon, Mar 02, 2009 at 02:59:40AM +0100, William Sherman wrote: > I am working with a USRP1. I eventually will want to transmit and > receive data packets between USRP1s, but right now I am getting to grips > with the system. > > I am currently trying out the benchmark_tx, benchmark_rx programs. > > I call benchmark_rx on my USRP1's LFRX-LF daughterboard and leave it > running, > > sudo python benchmark_rx.py -f 10M -R A --rx-gain=70 -v -r 500k -d 128 > > bits per symbol = 1 > M&M clock recovery omega = 2.000000 > M&M clock recovery gain mu = 0.175000 > M&M clock recovery mu = 0.500000 > M&M clock recovery omega rel. limit = 0.005000 > frequency error = 0.000000 > > Receive Path: > Using RX d'board A: Flex 2400 Rx MIMO B > Rx gain: 70 > modulation: gmsk_demod > bitrate: 250kb/s > samples/symbol: 2 > decim: 128 > Rx Frequency: 10M
Note that your -d 128 is overriding your -r 500k, resulting in a rx bitrate of 250kb/s. Leave out the -d option. > I then call benchmark_tx on my USRP1's LFTX-LF daughterboard, > > sudo python benchmark_tx.py -TA -f 10M -r 500k -v --tx-amplitude=20000 > > >>> gr_fir_fff: using SSE > bits per symbol = 1 > Gaussian filter bt = 0.35 > Using TX d'board A: Flex 2400 Tx MIMO B > Tx amplitude 20000.0 > modulation: gmsk_mod > bitrate: 500kb/s > samples/symbol: 2 > interp: 128 > Tx Frequency: 10M Since you're using only the -r 500k option, you get the right answer, 500kb/s. > This prints out ...... etc signifying packets are apparently being > transmitted. > > However when I flip over to the benchmark_rx console no packet > notifications are being displayed. > > Is the USRP transmitting data? Why is it not receiving this data if it > is transmitting? > > Furthermore is there a test/example program just for testing whether the > USRP is transmitting through its antenna? For instance a program that > gets the USRP to produce an audible tone out of its antenna? usrp_siggen.py Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
