Yes Martin, for example I’m working on a X310+UBX160 with a multichannel DUC that has 4 inputs each one with a different frequency offset and then i sum the outputs with the addsub rfnoc block(I generated the FPGA firmware accordingly).
Actually I managed to have it work correctly but I had to discover by myself some oddities, the correct steps in my configuration are in order: 1-configure the graph according to my needs (radio_control, duc, streamer) 2-set the RF output frequency on the radio control 3-make the tune request through the streamer 4-set the desired frequency offset on the DUC (for example: -10e6, -5e6, 5e6, 10e6) The last step is the more critical, in order to get the exact offset I had first to get the starting frequency offset of the DUC (which is not zero after the tune request, but just on the first channel of the DUC!!!) and then to sum up that residual frequency offset (which actually counts few kHz) to the desired frequency offset. If I miss this step it won’t have the exact offset needed. It seems to me a bit clumsy, is there a cleaner way to do it?
_______________________________________________ USRP-users mailing list -- usrp-users@lists.ettus.com To unsubscribe send an email to usrp-users-le...@lists.ettus.com
