> > On Thu, Apr 15, 2010 at 16:52, Marcus D. Leech <mle...@ripnet.com> wrote: > > > If you are willing to give up an LSB, you can turn on GPIO streaming > with enable_gpio_streaming(). Then io_rx[15] will show up in the lsb > of I, and io_rx[14] will show up in the lsb of Q. You need to use the > usrp2.source_16sc source to get the raw samples, then gr_and_const to > separate the digital bit from the rest of the sample. > > The io bits get stuffed as the samples come out of the DDC, so there > is a fixed offset (you'll need to measure it) based on the group delay > through the whole analog front-end and FPGA DDC. The delay is > decimation dependent, but deterministic. > > Johnathan > > > OK, so Josh, how do you get access to usrp2.source_16sc from GRC?
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