Hi all, I'm trying to understand the impact that changing the wire-format of a USRP has on the uhd_fft script provided by GNURadio.
Using UHD_003.008.001-42-g8c87a524 and GNURadio built by pybomb a few weeks ago (3427a667c). On a USRP N210 with 50 Ohm load, I ran uhd_fft --wire-format=sc8 -s 25M -f 700M uhd_fft --wire-format=sc16 -s 25M -f 700M With sc16, I get a mostly flat FFT with slight roll-off toward the ends, as I'd expect. With sc8, I get a dip at the center frequency that increased by about 10dB on either side as it moves out from the center freq. The way I understood it is that wire-format is just the format used over the ethernet cable, but that in both cases the internet representation in GNURadio is unchanged (I used fc32). Could someone help me understand why the wire format affects the FFT shape in such a strange way? I can attach screenshots if my description was unclear. Thanks! -Doug _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio