Re: [Discuss-gnuradio] running OFDM on USRP2

Hi,
We did try the below command on two USRP2s coneected via a SMA Cable (Tx-Rx)
with freq = 25M however it returned the following error on both sides

At Rx side it shows like the below -

[root@GNURADIO1 ofdm]# ./benchmark_ofdm_rx.py -f 25M -d 256 --fft-length=64
--occupied-tones=32 --cp-length=4
usrp: failed to find usrp[0]
Traceback (most recent call last):
File "./benchmark_ofdm_rx.py", line 210, in <module>
main()
File "./benchmark_ofdm_rx.py", line 199, in main
tb = my_top_block(rx_callback, options)
File "./benchmark_ofdm_rx.py", line 51, in __init__
self._setup_usrp_source()
File "./benchmark_ofdm_rx.py", line 70, in _setup_usrp_source
fusb_nblocks=self._fusb_nblocks)
File "/usr/lib/python2.6/site-packages/gnuradio/usrp/usrp_swig.py", line
1699, in source_c
return _usrp_swig.source_c(*args, **kwargs)
RuntimeError: can't open usrp

At Tx side -
root@gnu2 ofdm]# ./benchmark_ofdm_tx.py -f 25M -i 512 --fft-length=64
--occupied-tones=32 --cp-length=4
usrp: failed to find usrp[0]
Traceback (most recent call last):
File "./benchmark_ofdm_tx.py", line 217, in <module>
main()
File "./benchmark_ofdm_tx.py", line 190, in main
tb = my_top_block(options)
File "./benchmark_ofdm_tx.py", line 51, in __init__
self._setup_usrp_sink()
File "./benchmark_ofdm_tx.py", line 66, in _setup_usrp_sink
fusb_nblocks=self._fusb_nblocks)
File "/usr/local/lib/python2.5/site-packages/gnuradio/usrp/usrp_swig.py",
line 2415, in sink_c
return _usrp_swig.sink_c(*args, **kwargs)
RuntimeError: can't open usrp

May we request somebody to support us at the earliest to resolve the above
issue with either software or hardware .

Thanks again,
Anupama

bin zan wrote:
>
> Hello,
> I was trying to run following OFDM command on USRP2, however, I got
> a
> bunch of "SSSSStime out" at the receiver side.
>
> ./benchmark_ofdm_tx.py -f 2.4G -i 512 --fft-length=64 --occupied-tones=32
> --cp-length=4
> ./benchmark_ofdm_rx.py -f 2.4G -d 256 --fft-length=64 --occupied-tones=32
> --cp-length=4
>
> I wonder if there is any one successfully running OFDM on USRP2, what are
> the command parameters you are using and if there is any modification in
> the
> code, can you let me know.
>
> Thanks,
> Bin
>
> _______________________________________________
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>

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