Hello Van-Ly, what hardware are you using? If you're using any USRP, then the gr-uhd [1] blocks [2] will allow you to tune using stream tags, asynchronous messages and method calls. >From your problem description, it sounds like using stream tags is your best choice. If you want to know more about how to use these, I recommend going through the new guided tutorials [3], especially part 5 (which kind of relies on you having read the first four parts, but since I think you're already somewhat friends with GNU Radio, this might not be too much work).
Greetings, Marcus [1] http://gnuradio.org/doc/doxygen/page_uhd.html [2] sink: http://gnuradio.org/doc/doxygen/classgr_1_1uhd_1_1usrp__sink.html [3] http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorials On 12/03/2014 04:21 PM, Nguyễn Văn Lý wrote: > Hello everyone, > > Does anyone know how to change Tx frequency during transmission. I mean the > transmitter operates at f0 GHz in some interval of time and then change to > operate at f1 GHz. > > Sincerely, > Van-Ly > > Van-Ly Nguyen, > Research Assistant, > Signals and Systems Laboratory - SSL > Faculty of Electronics and Telecommunications - FET > University of Engineering and Technology - UET > Vietnam National University, Hanoi - VNU > > Tel: (+84) 97 881 9406 > > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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