I'm trying to get a simple PSK loopback working in GRC, File Source -> DPSK Mod -> DPSK Demod -> Unpacked to Packed -> File Sink.
On Ubuntu 12.10 x64 (build-gnuradio a few days ago), the sink file winds up with leading 7 bytes x00, 3 bytes plus one bit noise, four mangled bits, and then my correct bitstream. But the odd bit causes the entire remainder of the bitstream to be right-shifted by one. Throttling doesn't seem to have any effect. Interestingly enough, using MSWin7, I get 6 bytes x00, 2 bytes noise, 26 bytes mangle, and then a correctly aligned stream of bytes (other than a mangled sequence from about bytes 100-107). Am I missing something to provide symbol timing recovery? The GRC file is at https://docs.google.com/open?id=0B56aEJNJrwBAX2NhMHczdGhUejA TIA, Chris _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
