Path: utzoo!attcan!uunet!lanai!brian
From: brian@Eyring.COM (Brian Cooper)
Newsgroups: comp.terminals
Subject: Re: Electromagnetic Interference
Keywords: TeleVideo, Electromagnetic Interference, Magnetism
Message-ID: <1990Oct16.153303.1798@Eyring.COM>
Date: 16 Oct 90 15:33:03 GMT
References: <1096@tharr.UUCP>
Organization: Eyring, Inc.
Lines: 13

In article <1096@tharr.UUCP> conrad@tharr.UUCP (Conrad Longmore) writes:
>We've just installed a lab with TeleVideo 9320 terminals. The terminals
>are great, except that we noticed the screens weren't straight.
...stuff deleted...
>The problem remained. It looks like EMI from another source, or a magnetic
>field from the benching. Anyone had similar problems? Any solutions?

There is an office here where if you place a terminal against the back wall
the display dances like crazy.  Elsewhere in the office there is no problem.
Turns out the power mains for the building are on the other side of the wall.
You might try turning on a small radio and carrying it around to find where
the noise is coming from.  Our solution was just not to set a terminal there.
Seems like some expensive shielding would probably do the job.