Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!munnari.oz.au!ariel!ucsvc.ucs.unimelb.edu.au!wehi!baxter_a From: BAXTER_A@wehi.dn.mu.oz Newsgroups: comp.sys.amiga.hardware Subject: Re: A2320 Message-ID: <20424@wehi.dn.mu.oz> Date: 7 Feb 91 22:03:07 GMT References: <1991Jan29.054742.18143@cs.mcgill.ca> <3898@rwthinf.UUCP> <18245@cbmvax.commodore.com> <3901@rwthinf.UUCP> <189bc930.ARN13b6@venus.UUCP> <18435@cbmvax.commodore.com> <189ee486.ARN13cf@venus.UUCP> <18528@cbmvax.commodore.com> < Followup-To: om> <12912@hreferences: <18572@cbmvax.commodore.com> Lines: 48 Organization: Walter & Eliza Hall Institute Lines: 45 In article <18572@cbmvax.commodore.com>, hood@cbmvax.commodore.com (Scott Hood) writes: > In article <12912@hubcap.clemson.edu> ddyer@hubcap.clemson.edu (Eat shit) writes: >> >>I have a question on the subject of the deinterlacer: >> >> I am using the A3000, and if I choose a PAL display, the screen >>will flash (bright/dim) very rapidly (no flicker, though). Is this the >>1950B monitor, or something internal? >> >>Doug >>ddyer@hubcap.clemson.edu >> >>-- >>"I/O's revenge is at hand." - Hennessy & Patterson > > What you are seeing is the 50Hz PAL refresh rate (pity the poor > Europeans who have to watch TV like this) which appears to flicker. > This is not a line interlace flicker in this case, but a frame flicker. > It is made worse by the 10Hz beating between the 50Hz display and > viewing the display in a room of florescent (?) lights that are running > of the 120V 60Hz power. > > Regards, > Scott Hood Don't want to freak you guys out or anything, but 220-240V is usually run at 50 Hz, because 60 Hz is the ideal frequency for causing ventricular fibrillation, when someone gets electricuted, while 50 Hz is on the rapid down slope to not-so-bad-after-all. In other words, we occasionally get to see a slow beat moving its way down the screen from a great distance, which is not normally noticable. And we do get the other 1/4 of the screen to use! Regards Alan > > -- > -- > Scott Hood, Hardware Design Engineer (A3000 Crew), Commodore-Amiga, Inc. > {uunet|pyramid|rutgers}!cbmvax!hood hood@cbmvax.cbm.commodore.com > "The views expressed here are not necessarily those of my employer!"