On Fri, Dec 14, 2007 at 02:17:19AM -0500, George Nychis wrote: > >> >> I and Q are not on separate channels. They are interleaved, I0, Q0, I1, >> Q1... >> > > Are we sure of this? Based on Brian's pointer to here: > http://gnuradio.org/trac/browser/gnuradio/branches/features/inband-usb/usrp/fpga/toplevel/usrp_inband_usb/usrp_inband_usb.v#L235 > > ... it seems as though they are wired to separate channels. We then use > them as inputs to rx_buffer_input here: > http://gnuradio.org/trac/browser/gnuradio/branches/features/inband-usb/usrp/fpga/toplevel/usrp_inband_usb/usrp_inband_usb.v#L260 > > ... but only ever read from channel 0 (I). > > Is there a module we are missing that interleaves them? > > - George
Sorry George, I misunderstood which definition of "channel" you were using. Yes, in the legacy code they come from separate channels, but those channels are paired and interleaved to define a "channel" as seen by the host code. Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
