On 03/03/2013 09:28 PM, Gong Zhang wrote: > Hi, > I wanna transmit a 1khz Sinusoidal signal for one second and transmit > 2khz for another second.The code maybe something like this: > set_command_time(&mytime) > sig_sin_source.work(...) > set_command_time(&mytime+1) > sig_sin_source.work(...) > But as I know,the first set_command_time would back-pressure all > subsequent timed commands.This would make it impossible for the second > set_command_time to reach the USRP buffer in time. > Is it correct?And what's the suggestion? > I appreciate any tips. > Thank you. >
For timing the transmission of samples you will want to use the stream tagging feature of gnuradio (some examples and docs in the link): http://code.ettus.com/redmine/ettus/projects/uhd/wiki/GNU_Radio_UHD#Using-UHD-Software-with-GNU-Radio The timed commands thing is really for timing settings like tuning the device, or setting gain at a specific time, its separate from the streaming interface. -josh > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
