Re: [Discuss-gnuradio] reg calculation of BER/SNR using gnuradio UHD

On 09/27/2011 05:00 PM, shantharam balasubramanian wrote:
>
> Hi Ben,
>
> Thanks a lot for the reply. One of our colleagues downloaded the
> gnuradio version 3.1.2 and we are using that version. I don't know if
> we need to download the latest version of gnuradio (3.4.0) and run that.
>
> Now, the thing is, the benchmark_tx and benchmark_rx programs in
> gnuradio-examples/python/digital sub-folder work properly. That means,
> the receiver receives the packets transmitted by the transmitter.
> However, when we try running the benchmark_rx and benchmark_tx
> programs of gnuradio-examples/python/digital-bert subfolder, it fails
> to find usrp.
>
> We give the following command to run the benchmark_rx program of bert
> subfolder:
>
> ./benchmark_rx.py -f 2.412G -r 1M
>
> We have also tried with: ./benchmark_rx.py -f 2.412G -r 1M -w 2 (We
> are using USRP2)
>
> The program shows the following error message:
>
> usrp: failed to find usrp[0] (If we give -w 2, it says failed to find
> usrp[2])
>
> Runtime error: can't open usrp
>
> We don't know if we are giving wrong commands because similar commands
> work well for benchmark programs in the python/digital sub-folder.
> Your help will be very appreciated.
>
>
> Thanks,
>
> --
> Regards
>
>
The examples you are using are designed strictly for a USRP1, using
the "classic" interface. You have presumably modified your USRP2
for "UHD", which does not interoperate with programs using the
"classic" API.

I believe Tom Rondeau is busy working on updating most of the important
examples to use UHD, which will allow, among other things,
the ability to use *any* of the USRP hardware, more-or-less
seamlessly with most of the examples.

--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

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