Dave, For CE-Marking, EN55022 requires testing in a system configuration complete with keyboard, mouse, peripherals etc. Many labs maintain a known Class B compliant “golden” host PC for evaluating their clients PC components and/or peripherals. Note that FCC part 15 has a defined program for certifying PC components and subassemblies that allows PC vendors to assemble, mark and sell the PC based on use of all FCC 15 certified components without testing the assembled PC. The FCC15 procedure also requires testing in a system configuration, however, with the PC cover removed. The resulting measurements may be up to 6dB above limit. If emissions are measured above limit with the cover removed, the cover is replaced and the subject emanations re-measured. With cover(s) in place, all measurements must be in compliance with specification limits. I believe that the US & EU requirements are close enough that a single test and report can meet both requirements. Douglas G. Frazee Regulatory Compliance Manager Lucent Technologies PSAX Division [email protected]
From: [email protected] [mailto:[email protected]] Sent: Tuesday, November 11, 2003 5:34 PM To: [email protected]; [email protected] Cc: [email protected] Subject: RE: opinions, please I do have a custom shielded test fixture that will allow the DIMM to be tested alone. Any desired READ or WRITE pattern can be used. The stimulus equipment resides in a shielded rack directly beneath the DIMM. The DIMM is mounted vertically and is free to radiate into the hemisphere above the rack. Now, what level do I test for? CISPR 22 ? I was told that a mother board can be CE Marked if it is <6dB over the limit. The theory being that the enclosure will (might?) provide >6dB of attenuation. If this is so then do I test the DIMM this way? The reason I asked about DIMMs is because after reading the appropriate documents I was convinced that it had to be tested and later changed my mind. Now I'm leaning towards testing being a requirement. Dave Cuthbert Micron Technology From: [email protected] [mailto:[email protected]]On Behalf Of POWELL, DOUG Sent: Tuesday, November 11, 2003 2:49 PM To: '[email protected]' Cc: [email protected] Subject: RE: opinions, please Derek, Do you have a suggestion as to how the test should be performed? -doug Douglas E. Powell Corporate Compliance Dept. Advanced Energy Industries, Inc. Fort Collins, CO 80525 USA From: [email protected] [mailto:[email protected]] Sent: Tuesday, November 11, 2003 8:56 AM To: [email protected]; [email protected] Cc: [email protected] Subject: Re: opinions, please In a message dated 11/11/2003 9:36:21 AM Central Standard Time, [email protected] writes: The EMC guidelines read: "... If the component is intended to be placed on the market as a single commercial unit for distribution and/or final use this function has to be available WITHOUT further adjustment or connections other than SIMPLE ones which can be performed by any person not fully aware of the EMC implications..." After seeing all the other list positings and thinking some more, I'm going to change my opinion on what this should be marked as. Originally, I said component. But... This is a module that when added to a PC brings new capibility. But, it also adds a path for noise to exit a system that the manufacturer may have tested ( if they even did ) differently. So I guess, I would say now that the module should be CE marked, and at a minimum, the contribution it makes to radiated emissions determined. I guess my second 2 cents worth.... Derek N. Walton Owner, L F Research EMI Design and Test Facility Poplar Grove, IL 61065 _______________________________________________________________ This message, including any attachments, may contain information that is confidential and proprietary information of Advanced Energy Industries, Inc. The dissemination, distribution, use or copying of this message or any of its attachments is strictly prohibited without the express written consent of Advanced Energy Industries, Inc.
