http://www.ieee-pses.org/symposium http://www.emc2004.org/ -------------------------------------------------- I don't know that it is safe to make any assumptions. I would test under all conditions. Dave Cuthbert Micron Technology
From: [email protected] mailto:[email protected]] On Behalf Of Grasso, Charles Sent: Tuesday, June 01, 2004 12:38 PM To: 'Morse, Earl (E.A.)'; '[email protected]' Subject: RE: Q on testing different power modes for PCs http://www.ieee-pses.org/symposium http://www.emc2004.org/ -------------------------------------------------- Thanks Earl. I suppose my point is that different elements in the test (i.e cables) are more efficient as the frequencies become lower , so when I drop my clock frequency >from 1GHz to say 10MHz should I not test .... or is this a can of worms? Best Regards Charles Grasso Senior Compliance Engineer Echostar Communications Corp. Tel: 303-706-5467 Fax: 303-799-6222 Cell: 303-204-2974 Email: [email protected]; <mailto:[email protected]; > Email Alternate: [email protected] From: Morse, Earl (E.A.) [mailto:[email protected]] Sent: Tuesday, June 01, 2004 12:30 PM To: Grasso, Charles; [email protected] Subject: RE: Q on testing different power modes for PCs If the hardware didn't change and only the clock frequency was lowered you would be covered by only testing the highest speed. This is commonly done in the computer industry where processors are tested at their highest speed to cover all lower speeds. From: [email protected] mailto:[email protected]]On Behalf Of Grasso, Charles Sent: Tuesday, June 01, 2004 2:03 PM To: '[email protected]' Subject: Q on testing different power modes for PCs http://www.ieee-pses.org/symposium http://www.emc2004.org/ -------------------------------------------------- Greetings: Power saving modes becoming ubiquitous is consumer electronics and one of the techniques is to lower the clock frequency (while in low power mode). Heres the testing question: Given that different clock frequencies are used for power saving should we also be testing in standby modes? Best Regards Charles Grasso Senior Compliance Engineer Echostar Communications Corp. Tel: 303-706-5467 Fax: 303-799-6222 Cell: 303-204-2974 Email: [email protected]; <mailto:[email protected]; > Email Alternate: [email protected] From: Zhang Guoqing [mailto:[email protected]] Sent: Monday, May 31, 2004 10:29 PM To: [email protected] Cc: chendunli; Kelvin Shi Subject: a question http://www.ieee-pses.org/symposium http://www.emc2004.org/ -------------------------------------------------- Hi, I have a question on UL60950-1, in clause 2.6.4.2: "Equipment required to have protective earthing shall have a main protective earthing terminal.For equipment with a DETACHABLE POWER SUPPLY CORD, the earthing terminal in the appliance inlet is regarded as the main protective earthing terminal." in clause 2.3.2 "- for PLUGGABLE EQUIPMENT TYPE A, a separate protective earthing terminal shall be provided in addition to the main protective earthing terminal, if any (see 2.6.4.1)." My questions is how to mark the separate protective earthing terminal, do you think the symbol 60417-1-IEC-5019 is correct? For some equipment(for example, telecommunication centre equipment), seperate earthing terminal in the equipment may be a better way for connecting earth than earthing terminal in the appliance inlet. So my question is, if seperate earthing terminal is not required only from the standards UL60950-1, do you think the equipment which provide one seperate earthing terminal and indicated by symbol 60417-1-IEC-5019 do not comply with UL60950-1? Zhang Guoqing Huawei Technologies CO.,LTD. P.R. CHINA [email protected] Tel: +86-755-89653394 Fax: +86-755-89653384 Mobile: 13686493636 This e-mail and its attachments contain confidential information from HUAWEI, which is intended only for the person or entity whose address is listed above. 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