Yesterday I looked in this example. I let this example run with the parameters "-m dbpsk -f 20000",so the example should do the modulation. But on my scope, I still can't see a good modulated signal. Here is the output: http://old.nabble.com/file/p29169627/dbpsk.png dbpsk.png Can someone explain to me why I didn't get the right output? Thank you
Tom Rondeau wrote: > > On Wed, Jul 14, 2010 at 7:20 AM, EsserIHF <[email protected]> > wrote: >> >> Hi everyone, >> I am trying to do a PSK-Modulation. For that i use the dpsk-block and >> choose >> dbpsk which should be the same as psk-modulation. I connect the USRP with >> a >> oscilloscope, but i didn't get the expected output. >> I tried to set the input vector to 127,127...127 and 0,1,0,1.....0,1 but >> i >> either didn't get a good output. >> Where is my mistake? Please help, thank you. >> >> http://old.nabble.com/file/p29160823/psk.grc psk.grc >> >> the output for the vector 0,1....0,1 is this: >> >> http://old.nabble.com/file/p29160823/tek0062.jpg tek0062.jpg > > > Have you tried running benchmark_tx.py in > gnuradio-examples/python/digital? > > You can use that as a reference for how to use the modulator. > > Tom > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://old.nabble.com/psk-modulation-tp29160823p29169627.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
