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From: l-aron@obelix.liu.se (Lars Aronsson)
Newsgroups: comp.unix.questions
Subject: Re: Facit (\"ideal?\") Twist
Message-ID: <1066@obelix.liu.se>
Date: Sat, 16-May-87 08:52:31 EDT
Article-I.D.: obelix.1066
Posted: Sat May 16 08:52:31 1987
Date-Received: Sun, 17-May-87 19:59:36 EDT
References: <7325@brl-adm.ARPA> <320@forbrk.UUCP>
Reply-To: l-aron@obelix.liu.se (Lars Aronsson)
Distribution: comp
Organization: Undergraduate CS & CE, Linkoping University, Sweden
Lines: 28

Followup-To:

Smail: Rydsvagen 256 A:10, S-582 48 Linkoping, Sweden


Hello, Mats! Time to start comp.swedish.people ?

Mats Wichmann writes (mats@forbrk.UUCP - <320@forbrk.UUCP>):
>
>After getting used to the Facit, I went back and started using all my
>other terminals in inverse. I do this with each new type of terminal;
>after a relatively short time, I give up on each. The almost-subliminal
>wiggle/flicker just drives me nuts. If you ever want to see this
>clearly, darken the room a bit and sit somewhere away from the
>terminal doing something else. Out of the corner of your eye, you
>will (probably) see this flicker on the screen. Anyway, the point
>was that the Facit, because of its' higher refresh rate, seems not
>to suffer this problem, and thus is the only terminal comfortable
>for me in inverse video.

I'm writing this on a FACIT 4431, a traditional CRT terminal,
running at 60 Hz (screens per second). Some people prefer to
use it in inversed (black on light green) mode, but I just can't
stand the flicker. The FACIT Twist discussed here runs at 65 Hz.
I think that is kind of a limit. I've only heard of one "faster"
CRT terminal, and that is the Finnish NOKIA, which runs at 71 Hz.
I've got no figures on things like SUN or Xerox workstations.
Too bad, many terminals still run at 50 Hz, which is the mains
power frequency in Sweden and many other European countries.

Summary:
	Above 60..65 Hz -- Black on white is the natural thing.
	Below 60..65 Hz -- The less (flickering) light, the better.