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Re: [Discuss-gnuradio] benchmark test between two USRPs have different p

From: Josh Blum
Subject: Re: [Discuss-gnuradio] benchmark test between two USRPs have different performances in two directions
Date: Sat, 04 Aug 2012 13:53:18 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120714 Thunderbird/14.0

On 08/03/2012 03:45 PM, Weixian Zhou wrote:
> I run benchmark_tx in USRP A, and benchmark_rx in USRP B:
> A: ./benchmark_tx.py -f 2.46G -r 0.5M --tx-gain=-30
> B: ./benchmark_rx.py -f 2.46G -r 0.5M
> The n_right/n_recvd is 549/628.
> But when I rx in USRP A and tx in USRP B with the same parameters, the
> n_right/n_recvd is always pretty bad: 0/275.
> What might be the reasons?

0/275 doesnt sound like a performance difference. Something is just not
working, or incorrect setup, antenna issues.

Before experimenting with the mac layer examples in gnuradio, it might
be good to verify setup connectivity and signal integrity, etc.

have you verified functionality of your setup with a simple test tone?
Check the the correct antennas are used. correct frequency comes out,
reasonable power level.


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