problem with screen in MacTerminal

[Info-Mac]

Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10 UW 5/3/83; site uw-beaver
Path: utzoo!watmath!clyde!burl!ulysses!mhuxl!houxm!vax135!cornell!uw-beaver!info-mac
From: info-mac@uw-beaver (info-mac)
Newsgroups: fa.info-mac
Subject: problem with screen in MacTerminal
Message-ID:
Date: Sat, 1-Sep-84 16:00:23 EDT
Article-I.D.: uw-beaver>.1620
Posted: Sat Sep 1 16:00:23 1984
Date-Received: Mon, 3-Sep-84 09:45:13 EDT
Sender: daemon@uw-beave
Organization: U of Washington Computer Science
Lines: 20

From: Werner Uhrig
has anyone else seen a similar problem or has a hunch what might be wrong?

every character echoed back when I type, or any other character displayed
by the mainframe, causes the Mac to show 3 horizontal bars of whitish noise,
in particular I seem to see a rather thick white line which looks as if it
is the beam returning from the right side to the left for the next line.

I tried with both versions .15 and .5x and the problem is identical.

In addition , a few weeks back I had a similar problem, when I had vertical
stripes of snow, simply when connecting a cable to the modem-port. I also
don't like the temperature on the left side behind which the analog-board sits.
It simply feels hotter than I would like, nothing scientific, just a hunch.

I build the cable myself from a joy-stick extension cable, using the pin-connec-
tions described in MacTEP, and it tests out ok, as far as I can tell.

Anyone have any thoughts on the matter - I'd sure appreciate it.
-------