Hi Christian, Use command port in USRP source to control center frequency. I've build a frequency sweeper that can change center frequency automatically using message strobe and python block that connected to USRP command port.
This page may helpfull for your problem http://gnuradio.4.n7.nabble.com/Change-frequency-in-USRP-source-automatically-td58751.html -- View this message in context: http://gnuradio.4.n7.nabble.com/Change-value-of-a-Variable-defined-in-the-flowgraph-from-a-block-tp64432p64437.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio