On 09/28/2012 08:49 AM, Anisha Gorur wrote: > Hello All, > > I am using a USRP N210. When i set the subdev spec for my basic RX > daughterboard as "A:A A:B" I can receive two channels. However, if I try to > do something similar for the basic TX I get an error like "The user > specified 2 channels, but there are only 1 tx dsps on mboard 0." I assume > this is because there is only one DUC chain in the N210. Is there a way to > modify this so that I can have two DUC chains in the same way that I have > two DDC chains? > Thanks, > Anisha
I think adding two complete DUC chains into N210 would be too complicated to be worth it. Is there something specific that you cant do with the single DUC chain? As long as the cordic is set to zero, I and Q will remain completely separate from host samples, all the way to the SMA connectors A and B. Otherwise, perhaps you need a different rotation for I vs Q? I think that would be better accomplished by two different cordics. Then perhaps a custom DSP in the FPGA is for you: http://code.ettus.com/redmine/ettus/projects/uhd/repository/revisions/master/entry/fpga/README.txt#L29 I hope that helps. -josh > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
