My mistake, i didn't realise you were using the available DBPSK block. The Packed to Unpacked block is already part of this Modulator, so disregard my comment.
Marcin marcin_w wrote: > > You can't connect the file source directly to the Modulator. If you are > Using DBPSK, the modulator will be looking for 1 bit at a time, or in this > case a byte with only 1 significant bit. > > Use > > File Source > packed to unpacked [1 bit per chunk] MSB first > DBPSK > Modulator > > Marcin > > > David Barton-4 wrote: >> >> Hi, >> >> I am having trouble the the DBPSK mod and demod blocks. My flow graph is: >> file source -> DBPSKmod -> DBPSKdemod -> file sink >> >> The file source is a 2 byte text file set to not repeat >> The default parameters were used for the DBPSKmod and demod blocks >> (including 2 Samples/Symbol) >> When I run the graph the output text file becomes 13 bytes long and they >> are almost all zeros. I am not sure how it gets to be that length. >> >> I tried connecting the ouput of the DBPSKmod directly to the file sink >> and the file size was 256 bytes. This matched my expectations based on: >> 2bytes input file * 8bits/byte * 1Symbol/bit * 2 complex >> samples/Symbol* 8bytes /complex sample = 256 byte output file. >> >> If anyone knows why the output file of the whole graph would be 13 bytes >> or if I am missing something please let me know. >> >> Thanks, >> Dave >> >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> > > -- View this message in context: http://old.nabble.com/DPSK-Modulator-and-Demodulator-tp28319509p28323370.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio