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
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