-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 The default decim in the C++ program (which, IIRC, is deprecated) is 8. What decim (what bitrate?) are you using for GMSK?
- From the graphs, it looks like data from the C++ app is coming in about 4x too fast. - -Dan George Nychis wrote: > Hi all, > > I'm using benchmark_tx.py to transmit a GMSK sequence at 10MHz. As some > of you know, I'm trying to debug my own GMSK m-block receiver. > > If I use test_usrp_standard_rx -F 10000000 (not the in-band receiver) to > capture the incoming signal and plot it, I get the graph on the top, and > if I dump the data coming out of the usrp1_source_c block when running > benchmark_rx.py -f 10000000, i get the bottom graph: > http://www.andrew.cmu.edu/user/gnychis/std_gmsk.png > > I can successfully decode the transmission with my receiver using the > data output from usrp1_source_c and benchmark_rx.py ... however I cannot > decode it using the samples from test_usrp_standard_rx. > > So I'm wondering, what is benchmark_rx.py tuning on the USRP differently > than test_usrp_standard_rx? Of course, my goal is to duplicate this > action because my in-band code is also dumping data similar to the top > graph. > > Thanks! > George > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHaCW8y9GYuuMoUJ4RAq6KAJ9x/+6giS5yTx0or7u+x7HdckW3jgCgtbfw CaRXWRqSIabSD6HaqF2+loI= =PZlq -----END PGP SIGNATURE----- _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio