RE: Poland and CE and Harmonics
John, I have consulted with Woody Strzelecki on this. Not being an expert in Polish I would not venture to discuss the differences between Bezpieczenstwo and Bjezopasnost. FYI: Russians have different word for Safety (if I am not mistaken, Bjezopasnost' in Russian has different connotation and better translated as Security - well, these linguistic nuances...). As to the core of the original question, the national safety mark B is still required in Poland as far as I know. Correct me if I am wrong. I would only speculate that they would have to give up on this mark once they join the EU. On the other hand, there are other safety national marks in Europe marketing people still love. Regards, Vitaly Gorodetsky Compliance Engineer Direct: (818) 678-3840 Canoga Perkins Corp.Main: (818) 718-6300 20600 Prairie StreetFAX:(818) 678-3740 Chatsworth, CA 91311-6008 e-mail: vgorodet...@canoga.com mailto:vgorodet...@canoga.com The suitability of this information for making decision is solely with the reader -Original Message- From: jradom...@clare.com [mailto:jradom...@clare.com] Sent: Thursday, June 07, 2001 1:12 PM To: emc-p...@ieee.org Cc: emc-p...@ieee.org Subject:RE: Poland and CE and Harmonics For those who are interested in linguistic aspects of Compliance, the safety mark B stands for Bezpieczenstwo. The word pronounced as Bjezopasnost means Safety ... but in the Russian language. As far I know, test reports and certificates of conformity with pan-European standards issued by accredited testing laboratories are accepted in the approval process in Poland. John Radomski Gorodetsky, Vitaly vgorodet...@canoga.comTo: 'wo...@sensormatic.com' wo...@sensormatic.com, emc-p...@ieee.org Sent by: cc: owner-emc-pstc@majordomSubject: RE: Poland and CE and Harmonics o.ieee.org 06/07/01 12:47 PM Please respond to Gorodetsky, Vitaly Thanks, Richard For those who are interested in linguistic aspects of Compliance, Polish mandatory safety mark B stands for Bjezopasnost which means Safety. Vitaly Gorodetsky Compliance Dept. Direct: (818) 678-3840 Canoga Perkins Corp.Main: (818) 718-6300 20600 Prairie StreetFAX: (818) 678-3740 Chatsworth, CA 91311-6008 e-mail: vgorodet...@canoga.com mailto:vgorodet...@canoga.com The suitability of this information for making decision is solely with the reader --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@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://www.rcic.com/ click on Virtual Conference Hall, --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim
RE: CE or CB ?
Requirements for the 'CE' mark are typically determined by Directives published as an Official Journal (OJ) of the European Union. The directive you seem to be referring to is the EMC Directive (89/336/EEC). This other directives are available online. TUV has single-day seminars addressing requirements of the 'CE' mark. Both UL and TUV can do the CD dance. -Original Message- From: Dan Pierce [mailto:dpie...@openglobe.net] Sent: Thursday, June 07, 2001 6:31 AM To: 'emc-p...@majordomo.ieee.org' Cc: 'dan.kin...@heapg.com'; 'brian.stuc...@heapg.com' Subject: CE or CB ? I am in the process of introducing product into the EU and possibly world wide. I was shown that the CB mark testing covers all the countries in the EU that we plan to sell to and other countries as well. Is this a new mark? Would I be better off getting the CE mark and then test to other countries applicable standards or the CB mark? The test facility that provided me with the information was Intertek Testing Services, in California USA. I planned to test to: EN55013 EN55020 TBR21 61000-3-2 61000-3-3
Re: Product Safety: A Matter of Law or Litigation?
f0456d38489e0b4989d05ba531c78f88017...@cms21.t-yuden.com, Brian O'Connell boconn...@t-yuden.com inimitably wrote: So, as a general policy, would it be valid to be driven by an indvidual standard's scope rather than the Directives? Your question is too general to be safely answered either 'yes' or 'no'. -- Regards, John Woodgate, OOO - Own Opinions Only. Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. http://www.jmwa.demon.co.uk Why not call a vertically- applied manulo-pedally-operated quasi-planar chernozem-penetrating and excavating implement a SPADE? --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@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://www.rcic.com/ click on Virtual Conference Hall,
RE: Poland and CE and Harmonics
Hi Lyons, Up to this point, Poland is still not a Membership of the EU. They will be the first wave candidate coutry to apply for EU Membership by the end of year 2001??. Placing on the Poland market the telecommunication equipment requiring mandatory conformity assessment with the essential requirements and without the required mark of conformity with the essential requirements is prohibited according to Ludomir Nowak (Head of Terminal Equipment Test Laboratory in Poland). Ludomir Nowak can be contacted as the following address. Ludomir Nowak Head of Terminal Equipment Test Laboratory Phone: (+4822) 5128173, Fax: (+4825) 5128146 Email: l.mo...@itl.waw.pl For safety, the Polish Standard PN-93/T-42107, being the Polish translation of IEC 60950 was applied. The test reports and certificates of conformity iwth IEC 60950 or EN 60950/EN 41003 issued by accredited European laboratories were regonized in the homologation procedure. For EMC a mumber of European standards ahve translated into Polish, getting PN-EN symbol in the standard denotation. Foreign certificates of conformity with the corresponding original standards were also accepted during homologation procedure. Hope the above information will be usefull to you. Good luck! Richard Lee Compliance Engineer -- Terawave Communications, Inc. 30680 Huntwood, Ave. Hayward, CA 94544 Tel: 510-401-6590 Fax: 510-401-6628 www.terawave.com -Original Message- From: Lyons, Jim [mailto:jim.ly...@gtech.com] Sent: Thursday, June 07, 2001 7:59 AM To: 'emc-p...@ieee.org' Subject: Poland and CE and Harmonics I need to know the following: 1) Does Poland require or accept a CE declaration for safety, EMC and telecom, either now or in the foreseeable future? 2) Does Poland have a requirement for power line harmonics (i.e. EN61000-3-2)? Thanks for any help on this. Jim James W. Lyons Manager - Product Compliance GTECH Corp. 55 Technology Way West Greenwich, RI 02817 Tel (401) 392-7723 Fax (401) 392-4955 Email jim.ly...@gtech.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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@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://www.rcic.com/ click on Virtual Conference Hall,
OET bulletin 53
Hi, Does anyone have access to FCC OET bulletin 53. I can't seem to find it on the FCC's web site. thanks, Ron Chernus Compliance Engineer, DENSO --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@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://www.rcic.com/ click on Virtual Conference Hall,
RE: Poland and CE and Harmonics
Thanks, Richard For those who are interested in linguistic aspects of Compliance, Polish mandatory safety mark B stands for Bjezopasnost which means Safety. Vitaly Gorodetsky Compliance Dept.Direct: (818) 678-3840 Canoga Perkins Corp.Main: (818) 718-6300 20600 Prairie StreetFAX:(818) 678-3740 Chatsworth, CA 91311-6008 e-mail: vgorodet...@canoga.com mailto:vgorodet...@canoga.com The suitability of this information for making decision is solely with the reader -Original Message- From: wo...@sensormatic.com [mailto:wo...@sensormatic.com] Sent: Thursday, June 07, 2001 8:27 AM To: emc-p...@ieee.org Subject:RE: Poland and CE and Harmonics Jim, here is something from my archives from 1998. -- From: Krzysio S [SMTP:krzys...@polbox.com] mailto:[SMTP:krzys...@polbox.com] Sent: Monday, May 11, 1998 9:12 AM To: emc-p...@majordomo.ieee.org mailto:emc-p...@majordomo.ieee.org Subject:Re: EMC SAFETY REQUIREMENTS - Poland Hello to Pryor McGinnis and those who are interested in the topic (and also who are not), Example of ITE in Poland: For mandatory B certification of ITE in Poland you have to carry out tests according to two Polish standars: PN-93/T-42107: (idt IEC 950 (1991) = Amd.1 (1992) + Amd.2 (1993)) (SAFETY) PN-EN 55022: 1996 (idt. CISPR 22: 1993) (RF DISTURBANCE EMISSION) EMC testing will be extendet to immunity and the way of certification will change as the process of Polish Law approximation to Eauropean Community one continues. For details about ITE testing contact: Laboratory of Automatic Identification Techniques fax +48 61 8526376 For other EMC and Safety questions about common products in Poland contact Polish Centre for Testing and Certification in Warsaw: Director of the Centre: tel. +(48-22)-8471071, 8470742, fax -8471222 Director of Testing Department: tel. +(48-22)-8471722, fax -8433209 Best regards. Krzysztof Sieczkarek Laboratory of Automatic Identification Techniques Institute of Logistics and Warehousing Poznan, Poland fax +48 61 8526376 http://www.ilim.poznan.pl/la/index_E.html http://www.ilim.poznan.pl/la/index_E.html Richard Woods --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@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://www.rcic.com/ click on Virtual Conference Hall,
Re: CE or CB ?
Dan, There is no CB mark. The CE marking is required for the EU, indicating compliance with all applicable EU Directives for the product involved. This is accepted by the 15 member states and by Norway, Iceland, Switzerland, and Liechtenstein. Several Eastern European countries are waiting to be accepted into the EU, and may begin accepting the CE mark prior to membership, viz. Hungary, Poland, and the Czech Republic. Having a product, typically ITE, assessed to IEC 60950 via the CB Scheme is one of several methods to satisfy the safety aspect of the CE marking, viz. the Low Voltage Directive. You can see more on the CB Scheme at www.cbscheme.org . George Alspaugh Lexmark Dan Pierce dpierce%openglobe@interlock.lexmark.com on 06/07/2001 09:31:11 AM Please respond to Dan Pierce dpierce%openglobe@interlock.lexmark.com To: 'emc-p...@majordomo.ieee.org' emc-pstc%majordomo.ieee@interlock.lexmark.com cc: 'dan.kin...@heapg.com' dan.kinney%heapg@interlock.lexmark.com, 'brian.stuc...@heapg.com' brian.stuckey%heapg@interlock.lexmark.com (bcc: George Alspaugh/Lex/Lexmark) Subject: CE or CB ? I am in the process of introducing product into the EU and possibly world wide. I was shown that the CB mark testing covers all the countries in the EU that we plan to sell to and other countries as well. Is this a new mark? Would I be better off getting the CE mark and then test to other countries applicable standards or the CB mark? The test facility that provided me with the information was Intertek Testing Services, in California USA. I planned to test to: EN55013 EN55020 TBR21 61000-3-2 61000-3-3 Daniel J. Pierce Sr. Design Engineer OpenGlobe, Inc. (An Escient Technologies Affiliate) 6325 Digital Way Indianapolis, IN 46278 mailto:dpie...@openglobe.net P: (317) 616.6587 F: (317) 616.6587 --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@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://www.rcic.com/ click on Virtual Conference Hall, --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@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://www.rcic.com/ click on Virtual Conference Hall,
RE: Poland and CE and Harmonics
Jim, here is something from my archives from 1998. -- From: Krzysio S [SMTP:krzys...@polbox.com] Sent: Monday, May 11, 1998 9:12 AM To: emc-p...@majordomo.ieee.org Subject: Re: EMC SAFETY REQUIREMENTS - Poland Hello to Pryor McGinnis and those who are interested in the topic (and also who are not), Example of ITE in Poland: For mandatory B certification of ITE in Poland you have to carry out tests according to two Polish standars: PN-93/T-42107: (idt IEC 950 (1991) = Amd.1 (1992) + Amd.2 (1993)) (SAFETY) PN-EN 55022: 1996 (idt. CISPR 22: 1993) (RF DISTURBANCE EMISSION) EMC testing will be extendet to immunity and the way of certification will change as the process of Polish Law approximation to Eauropean Community one continues. For details about ITE testing contact: Laboratory of Automatic Identification Techniques fax +48 61 8526376 For other EMC and Safety questions about common products in Poland contact Polish Centre for Testing and Certification in Warsaw: Director of the Centre: tel. +(48-22)-8471071, 8470742, fax -8471222 Director of Testing Department: tel. +(48-22)-8471722, fax -8433209 Best regards. Krzysztof Sieczkarek Laboratory of Automatic Identification Techniques Institute of Logistics and Warehousing Poznan, Poland fax +48 61 8526376 http://www.ilim.poznan.pl/la/index_E.html Richard Woods -- From: Lyons, Jim [SMTP:jim.ly...@gtech.com] Sent: Thursday, June 07, 2001 10:59 AM To: 'emc-p...@ieee.org' Subject: Poland and CE and Harmonics I need to know the following: 1) Does Poland require or accept a CE declaration for safety, EMC and telecom, either now or in the foreseeable future? 2) Does Poland have a requirement for power line harmonics (i.e. EN61000-3-2)? Thanks for any help on this. Jim James W. Lyons Manager - Product Compliance GTECH Corp. 55 Technology Way West Greenwich, RI 02817 Tel (401) 392-7723 Fax (401) 392-4955 Email jim.ly...@gtech.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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@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://www.rcic.com/ click on Virtual Conference Hall, --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@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://www.rcic.com/ click on Virtual Conference Hall,
Re: CE or CB ?
Hello Dan, On Thu, 7 Jun 2001, Dan Pierce wrote: I am in the process of introducing product into the EU and possibly world wide. I was shown that the CB mark testing covers all the countries in the EU that we plan to sell to and other countries as well. Is this a new mark? CB is not a mark. CB (Certification Body) is a short-name for the CB Scheme, which is the abbreviation for the IEC System for Conformity Testing to Standards for Safety of Electrical Equipment (also know as IECEE). It is a scheme (means) for sharing electrical safety test data and reports among member bodies (30++ countries) in order to gain a mark, or marks, in those countries of interest to you. In recent years it has expanded to cover EMC (in some countries) and HazLoc equipment too (IECEx). Would I be better off getting the CE mark and then test to other countries applicable standards or the CB mark? CE Marking is required in the EU and is accepted in some other countries nearby the EU. It is not a safety marking, but an indication of compliance with EC Directives (which may have safety implications). The test facility that provided me with the information was Intertek Testing Services, in California USA. I planned to test to: EN55013 EN55020 TBR21 61000-3-2 61000-3-3 Feel free to contact me offline if you have further questions on this subject. You can read about the CB Scheme (and it's variants) on the Safety Link www.safetylink.com; Just search on the term CB. Regards, Art Michael Int'l Product Safety News A.E. Michael, Editor 166 Congdon St. East P.O. Box 1561 Middletown CT 06457 U.S.A. Phone : (860) 344-1651 Fax: (860) 346-9066 Email : i...@safetylink.com Website: http://www.safetylink.com ISSN : 1040-7529 - Daniel J. Pierce Sr. Design Engineer OpenGlobe, Inc. (An Escient Technologies Affiliate) 6325 Digital Way Indianapolis, IN 46278 mailto:dpie...@openglobe.net P: (317) 616.6587 F: (317) 616.6587 --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@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://www.rcic.com/ click on Virtual Conference Hall,
Poland and CE and Harmonics
I need to know the following: 1) Does Poland require or accept a CE declaration for safety, EMC and telecom, either now or in the foreseeable future? 2) Does Poland have a requirement for power line harmonics (i.e. EN61000-3-2)? Thanks for any help on this. Jim James W. Lyons Manager - Product Compliance GTECH Corp. 55 Technology Way West Greenwich, RI 02817 Tel (401) 392-7723 Fax (401) 392-4955 Email jim.ly...@gtech.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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@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://www.rcic.com/ click on Virtual Conference Hall,
CE or CB ?
I am in the process of introducing product into the EU and possibly world wide. I was shown that the CB mark testing covers all the countries in the EU that we plan to sell to and other countries as well. Is this a new mark? Would I be better off getting the CE mark and then test to other countries applicable standards or the CB mark? The test facility that provided me with the information was Intertek Testing Services, in California USA. I planned to test to: EN55013 EN55020 TBR21 61000-3-2 61000-3-3 Daniel J. Pierce Sr. Design Engineer OpenGlobe, Inc. (An Escient Technologies Affiliate) 6325 Digital Way Indianapolis, IN 46278 mailto:dpie...@openglobe.net P: (317) 616.6587 F: (317) 616.6587 --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@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://www.rcic.com/ click on Virtual Conference Hall,
Re: Shielding Effectiveness Question
Hi The following article Boxing Clever should make interesting reading on this subject. http://www.compliance-club.com/article.php?sid=16mode=order=0 Cheers Alan E Hutley EMC Compliance Journal - Original Message - From: mkel...@es.com To: emc-p...@majordomo.ieee.org Sent: Wednesday, June 06, 2001 5:35 PM Subject: RE: Shielding Effectiveness Question There's an article by B. Archambeault and C. Brench, entitled, Shielded Air Vent Design Guidelines from EMI Modeling in IEEE Int. Symp. On EMC, Dallas Tex., Aug. 1993, p.195. This article is referenced in a 1994 IEEE article entitled: Modeling Leakage Through Finite Apertures with TLM by Clifford H. Draft. Max Kelson Evans Sutherland -Original Message- From: Brench, Colin [mailto:colin.bre...@compaq.com] Sent: Wednesday, June 06, 2001 5:36 AM To: Neven Pischl; emc-p...@majordomo.ieee.org; si-l...@silab.eng.sun.com Subject: RE: Shielding Effectiveness Question Greetings Neven, There are a couple of things that need to be considered when you have an rf source close to a shield with apertures. First is the shielding properties of the shield as people have said this is very dependent upon the field impedance when you are in the near field. Second and no less important is the direct coupling between the shield and source conductors, the presence of the shield greatly affects the properties of the radiating source. With everything so close together there could well be resonances which result in windows in the shield at lower frequencies than you would expect. Some years ago I published a paper with my wife (Colin and Bronwyn Brench) on the effects of conductors close to apertures in a shield which illustrates this effect. The paper used very simple geometries not real ones and used a field source not a local one - but the premise was the same. It can be found in the EMC Symposium record - sorry I don't know what year - it won't help you directly, only show what behavior you might expect. I believe that to get an answer to your question you can only go so far analytically and that to get a detailed answer you will have to resort to a computational electromagnetics tool. It is important to accurately represent your EMI source, physically and electrically (I.e. source impedance) to get accurate results. good luck with this, Colin. -Original Message- From: Neven Pischl [mailto:npis...@cisco.com] Sent: Tuesday, June 05, 2001 12:16 PM To: emc-p...@majordomo.ieee.org; si-l...@silab.eng.sun.com Subject: Shielding Effectivness Question I would appreciate if anyone could let me know if there are any references (books, application notes, anythig ..) that deal with shielding efectivness in cases when a source is close to an (electrically small) opening in a shield (enclosure). In such a situation, the field will penetrate through the hole and leak even if the size is much smaller than the wavelength. I am particularly interested in situation when high-frequency source, such as a PCB edge or a component operating at (say) 1 GHz and above is in proximity of the venting holes, small gaps in the chassis etc. All references that I have deal with uniform plane wave propagating incident to a metal plane with a slot or hole, in which case it is enought o have electrically small size of the opening (e.g. lambda/10) to efficiently block any field propagation through the barrier. I can't find any useful reference that deals in any analytical way with the situation I am intersted in. I believe I might get some answers using some of the simulation programs, but at the moment I am more intersted in the analysis of the problem than in simulating it. Thank you, Neven Pischl --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@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://www.rcic.com/ click on Virtual Conference Hall, --- 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
