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[Discuss-gnuradio] benchmark example on USRP2

From: CNS Lee
Subject: [Discuss-gnuradio] benchmark example on USRP2
Date: Tue, 25 Aug 2009 23:54:01 +0200

Hi everyone,

I'm trying to establish communication between two USRP2 using
benchmark example. The command "./benchmark_tx.py -f 2.4G -r 500k"
doesn't work: USRP2 can not correctly decode the packets received, all
packets are 'false'. (PS:Same command works well on USRP1)
After many times' tests, the following magic combination are able to
show better results.
 #./benchmark_tx.py -f 2.4G -r 500k -s 98 -i 14 -discontinuous
 #./benchmark_rx.py -f 2.4G -r 500k -d 14
Test Result:
Received packet rate: 98%
Received OK packet rate: 97%
I'm wondering why I could not receive 100% correct packets?

The test environment: Ubuntu 9.04, GNU Radio 3.2.1, the SD card is
updated with latest version of firmware images
(http://gnuradio.org/releases/usrp2-bin/trunk/).USRP2 is bought the
end of 2008 with daughterboard XCVR2450.

I would appreciate if somebody can tell me what is problem of my test.



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