Re: Data transfer for real time analysis

From: Everett M. Greene (mojaveg_at_iwvisp.com)
Date: 04/27/04 

Date: Tue, 27 Apr 2004 08:11:46 PST

Pini wrote:

> We are planning a data acquisition system with 4-12 sub units. Each sub unit
> produce data of 25MBit/sec. The distance between the boxes and computer is
> about 2 meters.
> I'm willing to transfer and analyze the data in real-time. I'm willing to
> close a control loop in 1-5msec (I. wish 100usec ......).
> What is the recommended serial protocol?
> The sub units will be in-house made the host computer for data analysis and
> storage will be a PC (probably with raid HD).
> What communication HW should I use in my sub units?
> What communication HW should I use in the PC?

I take it you're not moving much data per port. By
my calculation, you can move about 25 bytes per port
with 12 active ports if all the ports are on one
25Mbit/sec channel. These numbers do not include
any overhead that my associated with the channel
protocol.

Are we going to get a hint as to the application?

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