Re: [PSES] Try these unusual EMI sources to check immunity
EMC performance is not always just about meeting standards, it’s also (well, sometimes anyway) about producing a reliable, quality product. The former does not necessarily lead to the latter, and you often have to go beyond the requirements of the standards to achieve real-world immunity. I’ve been using the chattering relay, the DC motor, and other ‘real world’ interfering sources since the early 80's. Other EMI sources I use are switching banks of incandescent lamps on and off (high inrush surge), walkie-talkie or CB radio keying (common high field strength RF sources), switching AC motors on/off (inductive kick on switch-off), and piezo spark igniter from a domestic cooking hob operated in the proximity of the EUT (fast EM impulse). It often takes protection measures above and beyond those required just to meet the standardsto make products immune to these real-world interferring sources. Just as an aside, a DC motor will often produce different EMI profiles according to the direction (+/- vs. -/+) it is run. This caused me considerable consternation during radiated emissions testing when the EUT would easily pass with a motor running in one direction and fail with it running in the reverse direction. Investigation showed it was due to the brushes bouncing more in one direction than the other, see below. Considering a typical low cost DC motor, the ‘(O)’ represents the contacts on the rotating shaft, the ‘u’ ‘n’ the brushes and the ‘- - -‘ the springy contacts which keep the brushes pressed to the shaft and come out of the motor as terminals 'x'. As shown below, the brushes will ‘bounce’ more with the shaft rotating CCW than when rotating CW. x---u (O) n---x - Original Message - From: Ken Wyatt Sent: 02/22/13 06:45 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Try these unusual EMI sources to check immunity Hi All, Try these unusual EMI sources to check the radiated or conducted immunity of your circuit or product! http://www.tmworld.com/electronics-blogs/the-emc-blog/4407544/Unusual-EMI-Sources Just posted on the Test Measurement World EMC Blog. Cheers, Ken ___ Kenneth Wyatt Wyatt Technical Services LLC Woodland Park, CO k...@emc-seminars.com Web http://www.emc-seminars.com Newsletter http://emc-seminars.us1.list-manage.com/subscribe?u=987f203d1f64dd89f06b0c3f5id=a00f29a904 Connect with me on LinkedIn http://www.linkedin.com/in/kennethwyatt ! - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to LT; emc-p...@ieee.org GT; All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas LT; emcp...@radiusnorth.net GT; Mike Cantwell LT; mcantw...@ieee.org GT; For policy questions, send mail to: Jim Bacher LT; j.bac...@ieee.org GT; David Heald LT; dhe...@gmail.com GT; - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Try these unusual EMI sources to check immunity
In message 20130225095615.79...@gmx.com, dated Mon, 25 Feb 2013, Anthony Thomson ton...@europe.com writes: Just as an aside, a DC motor will often produce different EMI profiles according to the direction (+/- vs. -/+) it is run. Many such motors are classed as 'non-reversible' as brush wear is excessive in reverse rotation. -- OOO - Own Opinions Only. See www.jmwa.demon.co.uk SHOCK HORROR! Dinosaur-like DNA found in chicken and turkey meals John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Recast of RTTE directive
John, since you ask...(but perhaps you only meant the re-scoping)... The RTTE recast is also be stepping forward with the unique equipment number requirement in the DoC which seems to require 1 DoC per unit (rather than 1 DoC per model line). As I've mentioned in a previous post, this is also appearing in the LVD recast, though 1 parliamentarian (Zuzana Roithová) is trying to change the impact of this DoC requirements point 1 to be a unique identifier for the DoC document itself. Regards, Lauren Crane KLA-Tencor -Original Message- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Friday, February 22, 2013 9:03 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Recast of RTTE directive In message d6ee39f37624ae40c6f7b6262384d...@mail.gmail.com, dated Fri, 22 Feb 2013, Peter Tarver ptar...@enphaseenergy.com writes: errr...yeah. Got interrupted by work that pays my salary. Thanks. It looks like good news to me; does anyone see a snag? -- OOO - Own Opinions Only. See www.jmwa.demon.co.uk SHOCK HORROR! Dinosaur-like DNA found in chicken and turkey meals John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Recast of RTTE directive
A unique DoC for each unit would be unfortunate. Cumbersome without being useful. The only circumstance I can think of where this would be reasonable would be if each unit itself is unique (i.e. custom). Jim Hulbert Pitney Bowes -Original Message- From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Crane, Lauren Sent: Monday, February 25, 2013 10:38 AM To: John Woodgate; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] Recast of RTTE directive John, since you ask...(but perhaps you only meant the re-scoping)... The RTTE recast is also be stepping forward with the unique equipment number requirement in the DoC which seems to require 1 DoC per unit (rather than 1 DoC per model line). As I've mentioned in a previous post, this is also appearing in the LVD recast, though 1 parliamentarian (Zuzana Roithová) is trying to change the impact of this DoC requirements point 1 to be a unique identifier for the DoC document itself. Regards, Lauren Crane KLA-Tencor -Original Message- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Friday, February 22, 2013 9:03 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Recast of RTTE directive In message d6ee39f37624ae40c6f7b6262384d...@mail.gmail.com, dated Fri, 22 Feb 2013, Peter Tarver ptar...@enphaseenergy.com writes: errr...yeah. Got interrupted by work that pays my salary. Thanks. It looks like good news to me; does anyone see a snag? -- OOO - Own Opinions Only. See www.jmwa.demon.co.uk SHOCK HORROR! Dinosaur-like DNA found in chicken and turkey meals John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Recast of RTTE directive
In message 617eb8c8634c9149aa66c853d7b8ac53040e3...@by2prd0310mb389.namprd03.prod.o utlook.com, dated Mon, 25 Feb 2013, Crane, Lauren lauren.cr...@kla-tencor.com writes: John, since you ask...(but perhaps you only meant the re-scoping)... I did mean the re-scoping. The RTTE recast is also be stepping forward with the unique equipment number requirement in the DoC which seems to require 1 DoC per unit (rather than 1 DoC per model line). AARGH!!! As I've mentioned in a previous post, this is also appearing in the LVD recast, though 1 parliamentarian (Zuzana Roithová) is trying to change the impact of this DoC requirements point 1 to be a unique identifier for the DoC document itself. I hope that industry in ALL countries will strongly object to this impractical AND ineffective provision. A non-compliant product can just as easily be supplied with a DoC carrying a serial number as a compliant product can (even though that is not at all easy in practice). -- OOO - Own Opinions Only. See www.jmwa.demon.co.uk SHOCK HORROR! Dinosaur-like DNA found in chicken and turkey meals John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
[PSES] Ecma TR-106 available
Posted on behalf of Tom Burke, UL: More good news for those seeking to learn more about IEC 62368-1 as the ICT Industry prepares for the eventual transition from IEC 60950-1 (and IEC 60065) to IEC 62368-1. ECMA International, previously known as the European Computer Manufacturers Association, has just published its Technical Report TR/106, which provides guidance and comparison between 60950-1 and 62368-1. The report was published by ECMA’s TC12 on Product Safety, and the effort to develop and publish the TR was very capably led by Mr. Richard Nute. Thank you Rich and members of ECMA TC12! ECMA has a strong interest in IEC 62368-1 since its industry standard, ECMA-287 “Safety of electronic equipment,” which was developed and published in the 1990s and which first introduced hazard-based concepts, was the core material that IEC TC108 used when it began it project developing IEC 62368-1 in 2002. It is believed that the availability of comparison documents like TR/106 from a variety of sources helps industry prepare for the pending transition and also helps clear up some of the misconceptions about the new standard. As has been discussed in this group previously, IEC 62368-1 has many familiar elements from 60950-1, including allowance for prescriptive constructions that have proven safe in 60950-1 and that may be used as an alternative to some of the performance based requirements in 62368-1. Provided below are links to information on ECMA TC12 and the TR/106 (available free of charge). http://www.ecma-international.org/memento/TC12.htm http://www.ecma-international.org/publications/techreports/E-TR-106.htm; Best regards, Rich - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Ecma TR-106 available
Thanks Rich, Much appreciated. Is there a similar dedicated document comparison for IEC60065 available? Regards, John -Original Message- From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Richard Nute Sent: Monday, February 25, 2013 2:45 PM To: EMC-PSTC Cc: Thomas M Burke Subject: Ecma TR-106 available Posted on behalf of Tom Burke, UL: More good news for those seeking to learn more about IEC 62368-1 as the ICT Industry prepares for the eventual transition from IEC 60950-1 (and IEC 60065) to IEC 62368-1. ECMA International, previously known as the European Computer Manufacturers Association, has just published its Technical Report TR/106, which provides guidance and comparison between 60950-1 and 62368-1. The report was published by ECMA's TC12 on Product Safety, and the effort to develop and publish the TR was very capably led by Mr. Richard Nute. Thank you Rich and members of ECMA TC12! ECMA has a strong interest in IEC 62368-1 since its industry standard, ECMA-287 Safety of electronic equipment, which was developed and published in the 1990s and which first introduced hazard-based concepts, was the core material that IEC TC108 used when it began it project developing IEC 62368-1 in 2002. It is believed that the availability of comparison documents like TR/106 from a variety of sources helps industry prepare for the pending transition and also helps clear up some of the misconceptions about the new standard. As has been discussed in this group previously, IEC 62368-1 has many familiar elements from 60950-1, including allowance for prescriptive constructions that have proven safe in 60950-1 and that may be used as an alternative to some of the performance based requirements in 62368-1. Provided below are links to information on ECMA TC12 and the TR/106 (available free of charge). http://www.ecma-international.org/memento/TC12.htm http://www.ecma-international.org/publications/techreports/E-TR-106.htm; Best regards, Rich - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Ecma TR-106 available
Hi John: No comparison for IEC 60065. Unfortunately, Ecma TC12 membership is dropping, so we don't have resources to do the work. And, TC12 should update the existing document to the second edition of IEC 62368-1. Let me know if you know anyone who would wish to join TC12 and help do the work! Best regards, Rich On 2/25/2013 12:05 PM, Tyra, John wrote: Thanks Rich, Much appreciated. Is there a similar dedicated document comparison for IEC60065 available? Regards, John -Original Message- From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Richard Nute Sent: Monday, February 25, 2013 2:45 PM To: EMC-PSTC Cc: Thomas M Burke Subject: Ecma TR-106 available Posted on behalf of Tom Burke, UL: More good news for those seeking to learn more about IEC 62368-1 as the ICT Industry prepares for the eventual transition from IEC 60950-1 (and IEC 60065) to IEC 62368-1. ECMA International, previously known as the European Computer Manufacturers Association, has just published its Technical Report TR/106, which provides guidance and comparison between 60950-1 and 62368-1. The report was published by ECMA's TC12 on Product Safety, and the effort to develop and publish the TR was very capably led by Mr. Richard Nute. Thank you Rich and members of ECMA TC12! ECMA has a strong interest in IEC 62368-1 since its industry standard, ECMA-287 Safety of electronic equipment, which was developed and published in the 1990s and which first introduced hazard-based concepts, was the core material that IEC TC108 used when it began it project developing IEC 62368-1 in 2002. It is believed that the availability of comparison documents like TR/106 from a variety of sources helps industry prepare for the pending transition and also helps clear up some of the misconceptions about the new standard. As has been discussed in this group previously, IEC 62368-1 has many familiar elements from 60950-1, including allowance for prescriptive constructions that have proven safe in 60950-1 and that may be used as an alternative to some of the performance based requirements in 62368-1. Provided below are links to information on ECMA TC12 and the TR/106 (available free of charge). http://www.ecma-international.org/memento/TC12.htm http://www.ecma-international.org/publications/techreports/E-TR-106.htm; Best regards, Rich - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Recast of RTTE directive
I can tell you that trying to make a unique DofC for each individual unit serial number is absolutely unworkable. Not to mention a documentation and logistics nightmare. So who do we complain to about having a unique DofC for each specific product? How do we get our voices heard? Scott On 2/25/2013 8:30 AM, John Woodgate wrote: In message 617eb8c8634c9149aa66c853d7b8ac53040e3...@by2prd0310mb389.namprd03.prod.o utlook.com, dated Mon, 25 Feb 2013, Crane, Lauren lauren.cr...@kla-tencor.com writes: John, since you ask...(but perhaps you only meant the re-scoping)... I did mean the re-scoping. The RTTE recast is also be stepping forward with the unique equipment number requirement in the DoC which seems to require 1 DoC per unit (rather than 1 DoC per model line). AARGH!!! As I've mentioned in a previous post, this is also appearing in the LVD recast, though 1 parliamentarian (Zuzana Roithová) is trying to change the impact of this DoC requirements point 1 to be a unique identifier for the DoC document itself. I hope that industry in ALL countries will strongly object to this impractical AND ineffective provision. A non-compliant product can just as easily be supplied with a DoC carrying a serial number as a compliant product can (even though that is not at all easy in practice). - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to emc-p...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
