> Do you have any hints for me?
Unless I am misunderstanding your diagram, I think you need something to slow down rate of the cosine source ([COS SOURCE]--/ \-->[UDP Sink 1]). If you connect it to a non-rate limited sink it will just pump out samples as fast as it can, hence your 100% CPU usage. Try a gr.throttle() in between. Jason _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio