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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