On Mon, Sep 26, 2011 at 05:36, Tom Rondeau <trondeau1...@gmail.com> wrote: > On Sun, Sep 25, 2011 at 8:07 AM, Brett L. Trotter <br...@webtrotter.com> > wrote: >> >> It seems my old patch that zeroed out the output of the USRP didn't make >> it into UHD- we're seeing a constant sine output between packets- and in >> our case this messes with the receiver unless we use some custom TX >> cards that have an amp we can shut down with ATR. >> >> Is there any way to fix this? > > I've never noticed this with my work with the UHD. There are various > commands issued to the USRPs to turn it on and shut it off between bursts. > Maybe there's something missing in the gr-uhd. > On the other hand, Josh and Nick have been working on using tags with gr-uhd > on the transmit side, which should fix your problem. > Any comments from the UHD folks?
Brett, if you are using anything beside the BasicTX or LFTX, then it's also possible you are seeing LO feedthrough/DC offset in the transit mixer, which results in a carrier output between packets. Johnathan _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
