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

From: shantharam balasubramanian
Subject: Re: [Discuss-gnuradio] reg calculation of BER/SNR using gnuradio UHD
Date: Tue, 27 Sep 2011 17:00:32 -0400

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.



Shantharam Balasubramanian
MS in Electrical and Computer Engineering
Rutgers University
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