From: Joerg Hansmann (info_at_jhansmann.de)
Date: 2002-01-14 22:29:12
Hi,
----- Original Message -----
From: Doug Sutherland <wearable_at_earthlink.net>
To: <buildcheapeeg_at_yahoogroups.com>
Sent: Monday, January 14, 2002 8:29 PM
Subject: Re: [buildcheapeeg] Re: optical coupler
...
> stereo mini-jack that was tested at 19.2k baud. The data
> sheet does not say this is the maximum rate.
Yes. It says nothing about the max baud rate. However
it says that propagation delay time is about 6 usec and that is
too much IMO for 115.2kbaud.
If propagation delay of ton and toff were equal it were no
problem... but it seems to be to hard at the limit.
> I have a few
> DS275s here. I will try to test at higher baud rates and
> let you folks know. What baud rate are we shooting for? I
> keep hearing 115.2k mentioned, but do we need that? Why is
> that rate picked, because it's the max for most PC serial
> ports? I really don't think we need 115.2k.
RS232EEG protocol operates with 56 kbaud.
115.2k baud is to have a BW reserve in the case that
the modularEEG is extended to more channels, higher sampling rate,
etc.
Regards,
Joerg
This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:36 BST