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[DPRG] Serial Woes
Subject: [DPRG] Serial Woes
From: Dave Hylands
dhylands at gmail.com
Date: Sat Feb 3 22:28:55 CST 2007
Hi Jeff,
Whoops - replying to the list this time.
> The alarm bell is "noisy signal". We tend to poke around with an
> o'scope probe looking at voltages, but we seldom check grounds. If
> you can, only ground the RS232 line at one end or the other.
Huh - For non-differential signals, you NEED to have a good solid
ground on both ends. The shield should only be connected on one side
or the other, but the ground must be connected or you won't get
reliable operation.
--
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/
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