Maximum sustained throughput that we have achieved so far, given our chipsets and the USRP's cypress usb interface is 32 MB/sec that yields, at 16 bit sample resolution:
32M / (2 *2) = 8Msps (complex) ==>8MHz bandwidth (Nyquist) 1 factor 2 is for I+Q channels the other is for 16bit (=2bytes) sample resolution of course, at the price of halving sample resolution you can get double bandwidth vincenzo feldmaus <feldmann_mar...@gmx.de> > Hi All, > > i read the FAQ and the Documentation, but i got some questions > about the maximum throughput. > > For the ADC which has 64MHz we get 32MHz if we follow nyquist criteria. > The Documentation tell us the maximum speed results in 32MByte/s. > How do you come from 32MHz to 32Mbyte/s ? > > I believe this facts are based on 1Byte pro Time is this correct ? > this means you can only send 1 Byte per Time over USB 2.0 ? > Sorry i am not very familiar with the USB protocol. > > The USB 2.0 support 480MBit/s that are 60MByte/s. > So i think the USB 2.0 is not the bottle-neck ? > > If USB supports 2Byte pro Time we get (32MHz*(2Byte pro Time))=64MByte/s ? > But this could be result in Problems with synchronous/asynchronous ? > > Regards Markus > > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > -- Vincenzo Pellegrini
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