If there aren't any GR-specific issues, you might consider moving this to the UHD-users mailing list.
- Presumably, you're using an SBX? - Is there any chance the bursts are just very short? Experiment with the trigger settings on the scope to see if you can catch any bursts. -John On Thu, Oct 9, 2014 at 8:43 AM, liisuu <liis...@gmail.com> wrote: > Hi everyone, > > I am a new user of GNU radio. I am trying to communicate between Tmote Sky > sensor node and USRP N210. > > I use the Tmote Sky sensor node as transmitter to broadcast messages by > flashing the example code into the node. The messages are broadcast in > radio > channel 26. (The code is this one > "./contiki/examples/ipv6/simple-udp-rpl/broadcast-example.c") > > I use USRP N210 as the receiver. I just want to test whether my USRP can > receive the broadcast messages or not. So I made a small receiver in > gnuradio-companion which just has a USRP Source, a Scope Sink and an FFT > Sink. I set the sample rate to be 4M, center frequency to be 2.48G, Channel > gain to be 15dB. > > However, in the scope sink and fft sink, I cannot find any signal except > the > noise. > > I am sure the sender works successfully because I have a receiver > implemented on another Tmote Sky sensor can receive the broadcast messages. > > I just want to make sure my USRP N210 can receive the signal so that I can > make a 802.15.4 receiver on it in the next step. > > I hope someone could give me some suggestions that I can make it work. > > Thanks in advance, > > Su > > broadcast-example.c > <http://gnuradio.4.n7.nabble.com/file/n50723/broadcast-example.c> > top_block.py <http://gnuradio.4.n7.nabble.com/file/n50723/top_block.py> > Receiver.png <http://gnuradio.4.n7.nabble.com/file/n50723/Receiver.png> > > > > -- > View this message in context: > http://gnuradio.4.n7.nabble.com/Some-problem-with-my-USRP-N210-tp50723.html > Sent from the GnuRadio mailing list archive at Nabble.com. > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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