[SI-LIST] Re: [SI-LIST]EMI from two systems
- From: Joel Brown <joel@xxxxxxxxxx>
- To: boris.traa@xxxxxxxxxxx
- Date: Tue, 16 May 2006 09:14:31 -0700
How about using a USB fiber optic converter, that way you can eliminate
the cable. You could also locate each part of the system away from the
test area using this method. Hopefully the converters themselves won't
contribute to the EMI.
Joel
Boris Traa wrote:
> In my opinion EMC and SI are related topics. For that reason I woul like
> to posit the following problem.
> Assume two battery supplied systems A and B are connected to each other
> via just one digital interface cable (e.g. USB) and positioned 80 cm above
> a reference plane. No more cables have been attached. If the EMI-level of
> this combination is to high I would like to investigate whether it is
> system A or B. Switching A and B off alternately is no option because it
> will lead to a malfunction of the other system.
> I could measure the CM-current through the interface cable but than I can
> not determine the main cause.
> Who can offer me a nice idea?
>
> Kind regards
> Boris Traa
> System design engineer EMC
>
> It's the currents that make circuits work or fail.
>
> Philips Applied Technologies/EM&C Competence Center
> Room 1.024
> High Tech Campus 26
> 5656AE Eindhoven, The Netherlands
> Tel: ++ 31 40 27 43766
> Fax: ++ 31 40 27 42224
> E-mail: boris.traa@xxxxxxxxxxxx Seri: nlv09273@nlwayhp
>
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