Whatever the standards say, the reality is that in certain circuits, the addition of "more" of the same type cards or cables will produce higher emissions. From personal experience, I have changed tests reports to state exactly the number of cables attached (or cards inserted) that give passing results, but fail when one "more" is added!
Here is where your integrity comes to a test. Do you provide equipment to your customers with 16 slots available, when you can only pass with 10 slots installed????? Needless to say, you will loose your customers sooner than later. Tania Grant, [email protected] <mailto:[email protected]> Lucent Technologies, Intelligent Network Unit Messaging Solutions Group ---------- From: [email protected] [SMTP:[email protected]] Sent: Tuesday, July 25, 2000 1:33 PM To: [email protected]; [email protected]; [email protected] Cc: [email protected] Subject: Re: Rack populating??-Rationalize it !! Methinks I must protest against the "keep adding until no more than xdB". As near as I can tell that was put in place by the FCC and others to minimize cable bundles - I cannot see how that applies to rack systems. The fundamental truth is that - no matter how one rationalizes it - if the full system is not tested then you flat have no idea what the real emissions profile is. Come on stop rationalizing - admit that there will be systems in the field that fail - and move on. This is a byproduct of volume vs test. The higher the volume the more rationalization takes place (witness the Class B procedures) until the emissions standards will be rendered irrelevant. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
