This may be a part of the equation...
Not including the control stream or transport protocol overhead and
assuming all streams run at same sample rate and bit resolution
6 streams x 192 kilo samples per second x 24 bits per sample = 27.648
Mega bits per second running across that Firewire.
AL, K0VM
On 1/11/2010 11:44 AM, Peter G. Viscarola wrote:
I'm sorry, but there is absolutely no limitation -- in USB or in Windows -- regarding the
number of "threads of execution" (threads being the unit of execution and
scheduling on Windows) that can use any given USB bus at one time. If there were, it
would be impossible to support more than 2 devices on a USB bus simultaneously.
Did you mean something different than what I understand from the term
"threads", perhaps??
That why I was asking. Again, I'm not trying to be argumentative and I'm not trying to
revive the "firewire, USB, Ethernet" discussions. I'm trying to see if there's
something that I genuinely don't understand.
Peter
K1PGV
From: Dudley Hurry [mailto:[email protected]]
Sent: Monday, January 11, 2010 12:09 PM
To: Peter G. Viscarola
Cc: Alan NV8A; [email protected]
Subject: Re: [FlexEdge] [Flexradio] [FlexRadio] Re: Flex 5000 has a 2.4 Khz
Spur????
Alan,
USB can only handle 2 threads at one time. The FireWire can handle 8 threads,
2 TX threads (I/Q) 4 RX threads (2 I/Q ) and control thread. All
isosyncnous . Giga bit would be better, but not all computers had a Gigabit
port in them and the gigabit standard was not set over 3 years ago of any kind
of radio control, if Gerald had to do it all over again, Giga would be the
way..
73,
Dudley
WA5QPZ
FlexRadio Systems
(512) 250-8595
Email: [email protected]<mailto:[email protected]>
Web: www.flex-radio.com<http://www.flex-radio.com>
"Tune in excitement!" ™
On Mon, Jan 11, 2010 at 10:50 AM, Peter G.
Viscarola<[email protected]<mailto:[email protected]>> wrote:
USB can not handle the number of threads at once.
I really don't want to beat this "why use 1394" horse any deader than we've beat it in the past few
years, and I'm not trying to argue. But I can't relate "USB" and "number of threads"...
can you say more about this?
Note that he's talking about USB 3.0 (Superspeed), which has a speed of 4.8Gbps.
Peter
K1PGV
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This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for
posting topics related to SDR software development and experimentalist who are
using alpha and beta versions of the software.
