You need to concern yourself with how may shelves to install in a rack only if you are responsible for the rack and its contents. If your responsibility is limited to the shelf, don't worry about the rack. Test rack with your shelf only - at top half.
For rack concerns, I only populate racks at 50% load to test, if the shelves are of identical type. My experience has shown that if you are going to have any problems with emissions or emissions margins, you will see this at half rack with identical shelves. Anything beyond this would not be cost effective. However, if the shelves are of different type, you MUST test at full rack. Regards, Bandele Jetstream Communications, Inc. [email protected] -----Original Message----- From: [email protected] [mailto:[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]
