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- Path: sparky!uunet!wupost!sdd.hp.com!uakari.primate.wisc.edu!ames!pacbell.com!well!louis
- From: louis@well.sf.ca.us (Louis Jaffe)
- Newsgroups: comp.sys.mac.hardware
- Subject: Re: What causes monitor flicker?
- Message-ID: <BtLqJJ.A6@well.sf.ca.us>
- Date: 26 Aug 92 17:42:54 GMT
- References: <1992Aug25.133857.22266@news.columbia.edu> <BtJww5.8rs@well.sf.ca.us> <1992Aug26.081135.1810@news.uni-stuttgart.de>
- Sender: news@well.sf.ca.us
- Organization: Whole Earth 'Lectronic Link
- Lines: 20
-
- It's very true that the external emissions from one monitor can
- interfere with the picture on another. I recently got an E-Machines
- T16-II. This is a heavily-shielded, low-emission 16" trinitron.
- Checking with an EMR meter, I confirmed that the T16-II emits 25%
- less magnetic radiation than my older Apple portrait display (monochrome).
-
- The surprise was that I couldn't use the two displays anywhere near each
- other because the T16-II was totally scrambled up by the emissions from
- the Portrait display (which itself displayed no interference). Testing
- further, I found that the T16-II picture is extremely sensitive to any
- ambient fields, even very weak ones. E-Machines tech support even told
- me that they adjust these things in their shop oriented East-to-West, and
- if you use them in a different compass orientation the raster can be
- affected. I.e it's so sensitive it shows the effect of the Earth's
- magnetic field.
-
- How a device that's so heavily shielded against mag radiation leaking out
- can be so sensitive to mag radiation leaking in is very puzzling to me.
-
- LJ
-