Request for spec. that deals with Site Sources
Et Al: I am trying to determine which specifications are used that set the amplitude and frequency accuracies of a site source that in turn is being used for performance testing inside of an EMI chamber. Regards, Jeffrey W. Greilich --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Hall-Effect Sensors and the Automotive Industry
Et Al: I am soliciting information regarding EMC standards that pertain to testing Hall-Effect Sensors for Safety Restraint Systems in the Automotive market. Anyone familiar with these specifications written or being written by any of the Big 3 are invited to contact me directly. Sincerely, Jeffrey W. Greilich EMC Technical Manager TAKATA Automotive Systems Laboratory, Inc. 27200 Haggerty Road, Suite B-12 Farmington Hills, MI 48331 (248) 848-2771 (Office) --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Question concerning antenna carousels, their usefulness, credibility of data collected, and......
Et Al: I am soliciting opinions from anyone who has attempted using an antenna carousel that aids in doing automated EMI measurements under CISPR 25. The CISPR 25 specification provides requirements in terms of spacings of the antenna elements from the walls of the room, size of the room, use of anechoic material, etc but not pertaining to adjacent antennas. In addition, certain automotive companies place further requirements in terms of expected performance relative to Round Robin results of a Test Artifact taken at several labs before allowing a new lab to be listed as AEMCLRP accredited. I look forward to hearing from those involved in the Automotive Industry who have information either good/bad relating to this issue. Regards, Jeffrey W. Greilich --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: product modifications by the end user
Et Al: I fully agree with Bob Wilson's comments concerning a good solution. It is only when marketing becomes responsible for its decisions will it provide marketing information that is truly useful. Regards, Jeff -Original Message- From: Robert Wilson [mailto:robert_wil...@tirsys.com] Sent: Tuesday, March 19, 2002 12:16 PM To: emc-p...@majordomo.ieee.org Subject: RE: product modifications by the end user One solution that would soon get rid of the problem at its source, would be to have the Marketing Moron do a few of the upgrades himself. With any luck, he would find out firsthand the effects of electrical current flow through the human body. :) Bob Wilson TIR Systems Ltd. Vancouver. -Original Message- From: Colgan, Chris [mailto:chris.col...@tagmclaren.com] Sent: March 19, 2002 4:36 AM To: 'Emc-Pstc' (E-mail) Subject: product modifications by the end user Hello good people Just say someone in your marketing department came up with the bright idea of selling upgrade kits to an unqualified, untrained end user that involved removing the top cover of a product. In the process not only would the victim be exposed to hazardous voltages (if the product was still connected to the mains) but he/she would also have to wire up mains connections. There would also be a possibility that critical insulation would be disturbed. Apart from telling them that they were mad and suggesting that someone could be killed or seriously injured, would there be any black and white legislation that you could use to help bin this idea? I can't find anything specific in EN60065 or the LVD. Thanks for any input Chris Colgan Compliance Engineer TAG McLaren Audio Ltd The Summit, Latham Road Huntingdon, Cambs, PE29 6ZU *Tel: +44 (0)1480 415 627 *Fax: +44 (0)1480 52159 * Mailto:chris.col...@tagmclaren.com * http://www.tagmclaren.com ** Please visit us at www.tagmclaren.com ** The contents of this E-mail are confidential and for the exclusive use of the intended recipient. If you receive this E-mail in error, please delete it from your system immediately and notify us either by E-mail, telephone or fax. You should not copy, forward or otherwise disclose the content of the E-mail. TAG McLaren Audio Ltd The Summit, 11 Latham Road Huntingdon, Cambs, PE29 6ZU Telephone : 01480 415600 (+44 1480 415600) Facsimile : 01480 52159 (+44 1480 52159) ** Please visit us at www.tagmclaren.com ** --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing
Safety Margins based on NSA premises
Et Al: Another important point to consider on safety margins is how the site performed for Normalized Site Attenuation (NSA) when applicable. A +/-4dB variation is the maximum allowable for NSA based on the premise that 1.5 dB is attributable to the site uncertainty and 2.5 dB is attributable to instrumentation uncertainty. Considering these uncertainties, if a mere 3 dB of margin is considered as safe, it is conceivable that the same EUT could be measured 8 dB different at another site (i.e. the FCC's Site). However, if a 10 dB margin is achievable, this automatically factors out site conjugate uncertainties and provides an additional 2 dB margin for a worst-case scenario. Regards, Jeffrey W. Greilich EMC Technical Manager Automotive System Laboratory, Inc. 27200 Haggerty Road, Suite B-12 Farmington Hills, MI 48331 (248) 848-2771 (Office) --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
If an Optical Isolation Circuit, Be Careful.....
Paolo, My experience has been that if it is an Optical Isolation Circuit, the actual RF isolation is usually far from desirable because of undesirable capacitive coupling that occurs within the transmit and receive circuitry. I would suggest that you determine if undesirable coupling occurs when the circuit is either active or inactive or all the time. Also, try removing the high-side of power from either side of the Isolation Circuit and determine if the undesirable RF coupling disappears. Between these two experiments, this should give you a pretty good idea of the causal relationship. Regards, Jeffrey W. Greilich EMC Technical Manager Automotive Systems Laboratory, Inc. 27200 Haggerty Road, Suite B-12 Farmington Hills, MI 48331 (248) 848-2771 (Office) -Original Message- From: Paolo Peruzzi [mailto:paolo.peru...@esaote.com] Sent: Monday, February 25, 2002 10:34 AM To: emc-p...@majordomo.ieee.org Subject: PCB floating area layout Hi all, I'm dealing with a PCB that has a floating section isolated from the rest of the board for safety purposes (patient applied part). I found out some problems with emissions, due to the coupling between the floating part and of the PCB and the earthed one. My questions are concerning the layout design of the floating area: 1) Is it best to minimize the HF capacitive coupling between the earthed ground and the floating ground or to maximize it? 2) Is it best to reduce the amount of the floating ground or to increase it? Does it depend on the goodness of the main ground, i.e. how much it is cold ? (I see the board as a dipole with one end connected to earth, and the other floating). Thanks, p.p. - ESAOTE S.p.A. Paolo Peruzzi Research Product DevelopmentDesign Quality Control Via di Caciolle,15tel:+39.055.4229306 I- 50127 Florence fax:+39.055.4223305 e-mail: paolo.peru...@esaote.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
RE: AC 97
Darrell: With respect to your radiated emissions dilemna, useful information would be the clock speeds, cable lengths, and worst-case mode of operation at which emissions are the highest. Generally, if you invoke the divide and conquer rule, it should be an easier matter pinpointing the dominant sources of emissions. Regards, Jeffrey W. Greilich EMC Technical Manager Automotive Systems Laboratory, Inc. 27200 Haggerty Road, Suite B-12 Farmington Hills, MI 48331 (248) 848-2771 (Office) --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
