From: John Woodgate
Subject: Re: Bypass RS-485 shield--ESD problem??
Date: Thu, 3 Oct 2002 15:07:24 +0100
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Thu, 3 Oct 2002 17:30:16 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Jim H wrote (in
) about 'Bypass RS-485
shield--ESD problem??', on Thu, 3 Oct 2002:
>I guess I should have explained initially - I have been assigned the
>task of getting a product designed by "digital" engineers through the
>compliance testing. I am RF savvy (ham operator for 26 years
>-graduated when tubes were the normal active devices, etc, etc.) - but
>cleaning things up after a ones and zeros guy is a daunting task.
>Challenging, to say the least. At any rate, I'm pleased to have
>attracted your attention John - exactly why I posted here.
Well, you really want to attract Tim Williams, who has much more hands-
on experience of data networks than I do. He has posted here
occasionally. But you can read his book 'EMC for product designers'. (Go
to Amazon and search.)
In such a case I think you have to come clean with management and say
that it's a tough job that will involve a number of changes at non-zero
cost and inconvenience, but it will NEVER be reliable if they are not
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
Interested in professional sound reinforcement and distribution? Then go to
PLEASE do NOT copy news posts to me by E-MAIL!