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[Discuss-gnuradio] What does access code in benchmark_tx.py do?

From: call5_99
Subject: [Discuss-gnuradio] What does access code in benchmark_tx.py do?
Date: Wed, 6 Aug 2008 11:07:58 -0700 (PDT)

       I was trying to send and receive packets with the programs
benchmark_tx and benchmark_rx. I have two USRP connected to two different
computers. My current understanding is, that access code is for
synchronization.  I changed the default access code completely on the
transmitter side from the file, packet_utils.py, whereas I didn't change the
default access code on receiver side. However, I am still able to receive
the packets sent by the transmitter correctly on the receiving side! So my
questions are-

1) Why is nothing affected when the access code is not the same on
transmitting and receiving side? 
2) Since the synchronization was not affected when I changed the access
code, how exactly is synchronization happening in benchmark_tx.py and

Thank you.

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