Perhaps this isn't the right place for this but I have an EMC problem as
follows :

A unit with a keyboard and mouse output (both PS/2 type connectors)
passes class B with no problems UNTIL a keyboard and mouse are attached.

Obviously the internal noise of the unit is being radiated out from the
cables.

I would like some advice on what to do about this - I have the following
constraints :

        The keyboard is 'off the shelf', CE marked, not screened and
cannot be altered.
        I have the option of making a filter PCB that sits inside the
unit to filter the PS/2 connectors.
        I cannot reduce the internal noise of the unit any further -
mostly 27MHz video clocks.

Any advice or help greatly appreciated.

Is there an EMC maillist out there or any good sites to visit for ideas
????

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| Mark Birks                       |
| Hardware Section Leader          |
| OmniBus Systems, Stanford House, |
| Stanford-on-Soar,                |
| Loughborough, Leicestershire. UK.|
|                                  |
| Tel/Fax: +44 (0)990 004300/333   |
| E-Mail: markb@omnibus.co.uk      |
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