RE: [SI-LIST] : Cable Shielding: How do you connect the drains?

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From: John Phillips (John.Phillips@WhiteCross.com)
Date: Mon Apr 02 2001 - 10:28:24 PDT


Can I suggest you take a look at

'EMC for systems and installations' by Tim Williams, ISBN 0750641673

Although primarily aimed at complaince of systems in the European
market place, it does cover the topic of Cable sheild bonding and
the safety implications in some depth.

Best Regards

John

-----Original Message-----
From: owner-si-list@silab.eng.sun.com [mailto:owner-si-list@silab.eng.sun.com]On
Behalf Of Stacy_L_Gore@raytheon.com
Sent: 02 April 2001 14:47
To: si-list@silab.eng.sun.com
Subject: [SI-LIST] : Cable Shielding: How do you connect the drains?

If you are running differential signals between to racks through a shielded
cable, what should you do with the cable drains?
Hard wire both-ends to the chassis?
Hard wire one end and let the other float?
Float both ends?
Connect through a series resistor, or series cap, or series cap and resistor in
parallel?
Is there a rule of thumb or formula based on something to help you determine how
to connect the shielding?
I have seen it done several different ways but never have been real sure which
way is correct.

Thanks,
Stacy

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