Path: utzoo!attcan!uunet!munnari.oz.au!goanna!dnl
From: dnl@goanna.cs.rmit.oz.au (David "IGOR" Latter)
Newsgroups: comp.terminals
Subject: Re: Electromagnetic Interference
Summary: scan rate should be mains freq.
Keywords: TeleVideo, Electromagnetic Interference, Magnetism
Message-ID: <3989@goanna.cs.rmit.oz.au>
Date: 16 Oct 90 23:00:33 GMT
References: <1096@tharr.UUCP> <1990Oct16.153303.1798@Eyring.COM>
Organization: Comp Sci, RMIT, Melbourne, Australia
Lines: 5

We have some old visual 50 terminals here which have user selectable vertical
scan rates. Here in Aust. we have 50 Hz mains supply, hence we need a 50 Hz
vertical scan to reduce mains interference on the video display.
The terminals do work on the other option of 60 Hz, but the display is somewhat
unstable..... Check that the scan rates match your line frequency.