My mistake, I'm using a UBX daughterboard with the X310 and was checking the DAC_ENABLE pin in the FPGA. I figured DAC_ENABLE might toggle whenever there is data to transmit, but it wasn't the case.
On Mon, Feb 25, 2019 at 10:44 AM Marcus D Leech <[email protected]> wrote: > I’m confused. There is no AD9361 on the X310. > > Sent from my iPhone > > > On Feb 25, 2019, at 10:02 AM, Alexander Olihovik via USRP-users < > [email protected]> wrote: > > > > Hi all, > > > > I modified the X310's FPGA to toggle a GPIO pin immediately once it sees > TX data, and delay the TX data by a fixed number of samples. Using an > oscilloscope, I found that everything works as expected, but there is an > initial spike of RF power that precedes the GPIO trigger and the RF signal. > Has anyone else experienced this? Is there anything I can set my GPIO > trigger on to start before the power spike? I also tried triggering the > GPIO pin on DAC_ENABLE, but it seems this signal goes high and stays high > once the AD9361 is initialized, and not only when the DAC is about to push > out data. > > > > Best regards, > > Alex > > _______________________________________________ > > USRP-users mailing list > > [email protected] > > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > -- *Alex OlihovikUniversity of Virginia 2013BS Electrical EngineeringBS Computer [email protected] <[email protected]>*
_______________________________________________ USRP-users mailing list [email protected] http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
