[filmscanners] RE: Power Line Filter

["Austin Franklin" <darkroom@ix.netcom.com>]

> > This is absolutely NOT hogwash.  It's called
> > EMI, Electro Magnetic Interference.  It is VERY
> > well known to exist, and cause the exact problems
> > mentioned.
>
> Any scanner or other device that is so poorly designed that EMI affects it
> visibly is defective and should be replaced by something conceived by more
> competent engineers.  The idea that one should put devices on
> separate power
> supplies and in separate rooms, or whatever, is absurd and impractical.

I didn't say that, now did I Anthony.  EMI IS real, and it doesn't mean the
engineer is incompetent.  Obviously, you haven't designed any equipment like
this, nor have you diagnosed EMI problems.  These devices are not designed
to work on the same circuit as your blender or air compressor.

> > I have not experienced scanner noise with my
> > scanner, but it is designed such that this
> > will not be an issue.  That does not mean that
> > no scanners don't have these problems.
>
> Then the solution is to replace the scanner, rather than build a
> TEMPEST-conformant isolation chamber to hold it.

Again, Anthony, no one suggested that at all...you being an extremist and
looking for an argument.  Moving the scanner to another circuit that isn't
as loaded so as to provide sufficient current, or using a line filter is
hardly building a Tempest conformant isolation chamber, now is it?

Austin

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