On Tue, Oct 23, 2007 at 08:42:59AM -0700, Hans Glitsch wrote: > > > >For the Basic Rx, 0xf3f2f1f0 is the correct setting to feed 4 separate > >signals into the I inputs of 4 DDCs, with zeros fed to the Q inputs. > > > >To use 4 channels, you must use the std_4rx_0tx.rbf fpga image. > >If you use the std_4rx_0tx.rbf image, the decimation rate must be <= 128. > >If you need more decimation, you must do it in software. > > > >Eric > > > > I wasn't aware that I couldn't use a decimation of 250. 250 seemed to work > fine with release 3.0.
This is the problem that was reported last week. Without the halfband in the FPGA, the CIC sections aren't wide enough to support decimation > 128 without losing information. > Are odd numbers ok? Can I use a decimation of 125? With the std_4rx_0tx.rbf image, I believe odd numbers will work. They will not work with std_2rxhb_2tx.rbf > Thanks, > Hans Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
