Re: [buildcheapeeg] Re: optical coupler

From: Doug Sutherland (wearable_at_earthlink.net)
Date: 2002-01-15 01:49:01


Hi Joerg,

> RS232EEG protocol operates with 56 kbaud.

What sampling rate is being used at 56k? Have you
tried lower rates? I have looked at about a dozen
small EEGs and all seem to use 9600 baud. What
happens if you set it to 19.2k? Is it not fast
enough?

> 115.2k baud is to have a BW reserve in the case
> that the modularEEG is extended to more channels,
> higher sampling rate, etc.

Reserve sounds like a good thing, but 115.2k is
tenfold what most small EEGs are using. I would
like to understand what the practical maximum
sampling rate is and what baud rate is needed to
support that. Any ideas?

Thanks,
Doug



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