I am searching for potential design solutions for Network Interfaces (Token
Ring & Ethernet) related to the new EN 55022: 1998 Conducted Emissions
Telecom requirements.  We are performing the measurements on various network
interfaces using Category 5 cabling and ISNs.  Are designers able to reduce
the emissions using external low frequency ferrites (common mode or
differential mode) on the interface cables or are designers adding
additional filtering at the board level or ....?

Is anyone involved in the design of Token Ring Network systems, that can
tell me how much filtering can be added to a board interface without
corrupting the communications?

I would appreciate any feedback regarding potential design techniques.

Regards,

Michael Hart

Xerox Corporation
800 Salt Road Building 843
Mail Stop 843-16S
Webster, NY 14580

716-422-3760
716-422-6449 fax
michael.h...@usa.xerox.com

http://www.xerox.com 





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