On Wed, Apr 05, 2006 at 02:30:30PM -0700, jjw wrote: > > I know this is probably an extremely stupid question, but I wanted to get > some verification. I've noticed that the minimum decimation rate you can > use in all of the sample programs is 4 (giving you an effective sampling > rate of 16 MHz). If you are transmitting 1 real channel of data (16 bits) > at this rate,
Note that the standard FPGA build will not xfer a single real channel... > that seems to be maxing out the USB transfer rate of 32 MB/s. > Am I correct in my deduction that you need to use a decimation rate of at > least 8 in order to transmit complex data (such as for FM demodulation) > successfully across the USB? Thanks. Yes, decim = 8 gives 64e6/8 = 8MS/s complex. In general, you want to use the highest decimation factor that works for your application. This offloads more of the crunching onto the FPGA. Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
