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[Discuss-gnuradio] new modulation schemes do not work on my usrps while

From: John Andrews
Subject: [Discuss-gnuradio] new modulation schemes do not work on my usrps while the old ones work
Date: Sun, 14 Nov 2010 17:38:48 -0800

I have the latest gnuradio installed on my Ubuntu 10.04 computers and two USRPs with RFX-2400 cards. I tested the benchmark_tx.py/benchmark_rx.py and benchmark_tx2.py/benchmark_rx2.py with dbpsk and dbpsk2 modulation schemes but only the old schemes work.

1. With old schemes both usrps transmit and receive when tested in both tx/rx modes.
2. With the new scheme one of the receive computer displays 'false ' for almost all the packets received. I didn't see any successfully received packets.
3. One of the USRPs in the receive mode doesn't even acknowledge a transmission and hence the benchmark_rx2.py script doesn't print any thing on stdout.

What changes in parameters should I try in order for them to work?


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