Re: [Discuss-gnuradio] USB2, 32 MByte/s or 480MBit/s?

[Daniel O'Connor]

On Friday 16 June 2006 13:19, Thomas Schmid wrote:
> 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).

For starters USB only does 480MBit/sec on the physical layer. It has quite a 
number of overheads which prevent this throughput being fully realised.

I believe the practical throughput IS higher that 256MBit/sec but I don't know 
for sure (or what the bottleneck is)

-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
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