HP3000-L Archives

February 1995, Week 1

HP3000-L@RAVEN.UTC.EDU

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Subject:
From:
John Beckett <[log in to unmask]>
Reply To:
John Beckett <[log in to unmask]>
Date:
Thu, 2 Feb 1995 17:00:35 -0500
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> : PROBLEM: Image is distorted
>
> : POSSIBLE CAUSE: Is the earth's magnetic field interfering with the display?
>
> : REMEDY: Face monitor east for best image quality.
>
> IMAGE distorted?  No!  Unless you have something against IMAGE/SQL, maybe? :)
>
> Re: earth's magnetic field.  I read recently (Byte?) that if you re-orient
> your monitor after it's been turned on for awhile then you might want to
> do a manual degauss at that time (because the monitor's relation to the
> earth's magnetic field changed).
 
Amazing.  My Magitronic monitor is able to tolerate 2-3 milligaus before
showing any distortion at all.  The earth's magnetic field is apparently
under 1 mg, because my gaussmeter won't measure it at all.
 
My experience is that a printing calculator (with transformer in the calc,
not a power cube) would cause _much_ more problem.  Or an electrical
conduit.  We picked up readings above 20 milligaus from conduit an
improperly-wired conduit carrying 3-phase wye.  It was a joke until the
Workmans' Comp bills hit my boss's desk.  It seems she was suffering all
sorts of symptoms due to the jumpy raster.
--
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