As a point of reference the SSRP was used in a radio astronomy application where maximum bandwidth was important and we were able to squeeze a little more than 40MB/s out of the bus.
I think this says that there is a little more to be had but that the USRP is doing a pretty good job at 32MB/s... -David Carr > >>> Hi, >>> >>> I was wondering why can the USRP "only" achieve 32 MByte/s, i.e. 256 >>> Mbit/s whereas the USB 2.0 specifications are 480 MBit/s? The 32 >>> Mbyte/s is mentioned in several earlier posts on the gnuradio mailing >>> list archive and in the BBN report (freebsd section). >> >> >> One is 'full-speed' and the other is 'high-speed'. Different chips are >> required. > > That is incorrect. Full speed is 12 megabits per second (1.5 > megabytes/s) and the USRP doesn't do full speed, only high speed. > > The USRP easily does 256 megabits per second (32 megabytes/s). The USB > 2.0 raw signalling rate is 480 megabits per second, or 60 megabytes per > second. You can't get the full 480 because there is overhead from > packet headers, time between packets, etc. We could probably squeeze a > little more bandwidth out of the bus, but it isn't a priority for now. > > > Matt > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
