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Re: [Discuss-gnuradio] Benchmark_Tx Problem


From: Ben Hilburn
Subject: Re: [Discuss-gnuradio] Benchmark_Tx Problem
Date: Fri, 6 Apr 2012 16:52:33 -0700

Sam -

(O)s indicate that there are overflows occurring - your computer is not able to keep up with the data rate, and is falling behind in processing as new packets arrive.

Cheers,
Ben

On Fri, Apr 6, 2012 at 1:39 PM, sibar002 <address@hidden> wrote:

Hello,

I am using USRP 1 with the XCVR2450 daughterboard. I am also using Ubuntu
10.0.4 with gnuradio-3.5.1. I have tried running benchmark_tx/rx with the
following parameters:

./benchmark_tx.py -f 2.45G -A J1 --spec B:0
./benchmark_rx.py -f 2.45G -A J1 --spec B:0

I am not consistently able to receive the packets that are sent. I sometimes
receive the initial packets, but then program begins to overflow ('O'). I
have tried connecting the USRP1s directly with attenuators, and I have also
tried using the antennas.  I have also used the uhd_fft.py program in order
to make sure that I am receiving a signal. I am able to see a peak at the
correct frequency when I am transmitting. I have also tried using the
Basic_Tx/RX and LFTX/RX daughter-board and I obtain the same result. I would
greatly appreciate any help or advise that anyone could give me. Thank you
for your time and help.

Sam

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