Benchmark_Tx Problem

GNU Radio
1

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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2

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

3

Hello Ben,

Thank you for your response. I tried adjusting my bitrate in order to
prevent this from happening, but I continue to have the same problem. I
forgot to mention that I am running a dual OS on my computer (Windows
and
Linux). Could this be causing the overflow problem? Thank you again. I
really appreciate any help or advice.

Thanks
Sam

Ben H.-3 wrote:

On Fri, Apr 6, 2012 at 1:39 PM, sibar002 [email protected] wrote:

would

Discuss-gnuradio Info Page

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4

On 04/06/2012 07:59 PM, sibar002 wrote:

Are you running your Linux partition as a VM, or you just dual-boot?

I’ve found that USB support through VMWare is horrible.

On Fri, Apr 6, 2012 at 1:39 PM, sibar002[email protected] wrote:

I am not consistently able to receive the packets that are sent. I
greatly appreciate any help or advise that anyone could give me. Thank

–
Marcus L.
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

5

On Fri, Apr 6, 2012 at 8:10 PM, Marcus D. Leech [email protected]
wrote:

Thanks
Sam

Are you running your Linux partition as a VM, or you just dual-boot?

I’ve found that USB support through VMWare is horrible.

Sam,

Also, are you building with autotools (./configure) or cmake? I’ve
been seeing more reports on this then before, so I’m trying to figure
out if there’s something odd going on and where.

Tom

6

Hello,

Thank you for everyones response.

Marcus - I am using a dual-boot because VM just wouldn’t for me.

Tom - I used the ./configure.

Thank You

Samuel I.