Hi Devin, You wanted to ramp up/down the external PA: Use the GPIO pins, and the ATR registers [1] or timed commands issued over the message bus [2] to change their state
Best regards, Marcus [1] http://files.ettus.com/manual/page_gpio_api.html#xgpio_fpanel_atr [2] http://gnuradio.org/doc/doxygen/page_uhd.html#uhd_command_syntax On 08/18/2015 09:17 PM, devin kelly wrote: > Hello, > 0 > I'm transmitting a fairly bursty, irregularly timed signal. I attach > a stream tag to the sample that has the start of the burst (tx_sob). > I also have a PA that I can turn on and off that's inbetween my USRP > B210 and antenna. > > I'd like to be able to turn the PA on and off synchronously, say 50 ms > before tx_sob is to be transmitted. > > Is there any way to do this? I'm thinking I could add a new tag > that's 50 ms before my transmission but then how would I synchronously > turn on the PA? Is there something like a callback function I can > use? Does the UHD or the UHD block have this functionality? > > Thanks for any help, > Devin > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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