Shravan Rayanchu wrote: > Hello everyone, > > My understanding is that the decimation value for the fpga has to be > between [4, 256]. In usrp_spectrum_sense.py, when I set the decimation > values to 16 or 8 (spanning 4Mhz and 8Mhz chunk at once), then > m.data[0] ...m.data[255] print out fine. However, when I set the > decimation to 4 (i.e. we will be observing a chunk of 16 Mhz), then > all the values data[0] ..data[255] are ZERO. > > I am trying to understand why is this the case .. is it that the USB > is not fast enough for decimation value of 4? I get some "u0"s printed > out even when I run for decimation values of 16 and 8 ... is this a > cause of concern?
If you use a decimation value of 4, you need to switch to 8-bit samples. The bus isn't fast enough for 16-bit samples with a decimation of 4. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
