Marcus D. Leech wrote: > Josh Blum wrote: > >> svn up! >> >> let me know if something goes wrong >> >> > Intersesting. > > When I use 8-bit samples with decim=8 or higher, things are peachy. > > But when I use decim=16 with 8-bits samples, I get a continuous stream > of -423dB out of the FFT Log Power sink. > > I think what I'm getting is a pile of 0s from the USRP when decim=4. > > Can anybody confirm that decim < 8 actually works on the USRP? > > > > OK, let's try that again with my brain actually engaged.
Anything with decim=8 or higher, in 8-bit mode, produces "sensible" samples. Anything with decim lower than 8 (like 4) produces nonsensical results in the Log Power FFT sink (a continuous block of -423dB). I suspect that with decim=4, there ain't nothing but zeros going across the USB. So, does decim=4 actually work on the USRP, or do I need different firmware? -- Marcus Leech Principal Investigator, Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
