Clark Pope wrote: > I've been collecting snapshots through my DBS and USRP to do DBPSK and > DQPSK bit error rate testing. I'm not able to get the BER below about > 1e-5. It seems that slips are occuring spontaneously in the data even > though no over/underflow is reported during the collection. > > Questions: > 1. Has anyone successfully done long term collections without any slips? > 2. Are the O/U flags sticky?, i.e. if I don't see an under or overflow > reported then I can be sure the fifos were okay? > > I've done BERs from 1 Mbaud to 11 Mbaud all with the same frequency of > slips so it does not appear to be speed related.
Do the errors occur at uniform intervals? This may actually be internal to GNU Radio. Can you try demodulating a signal which is generated in GNU Radio? You should have no hardware in the chain at all. This will help tell us where the problem is. Thanks, Matt _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
