Johnathan- > > I assume this also true for the BasicRX daughterboard? (Doesn't do > > downconversion, but does do analog multiplication to get I and Q?) > > Almost. The boards don't do anything with the signal, but have separate > I and Q inputs that go to the ADCs as is. > > On the FPGA, however, there are digital mixers that you can use to > convert a center frequency down to baseband, so you get a complex I and > Q signal out of that, even if you only supply a signal to the I input. > That is what is actually happening when you "tune" a BasicRX or LFRX board.
I think the OP is confused at what "signal processing" is happening on the RF daughterboard. Although some recent posts have said "none", there actually is some -- filters to separate the I and Q signals which were summed at the point of original transmission to make a single airwave. This is why the two ADCs are actually sampling separate, different signals, even though their sampling rate clocks are synchronized. -Jeff _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
