emc-pstc archive and RCIC
The RCIC archive for emc-pstc messages will be shut down, permanently, some time this week. The archive itself is preserved. We are working on a new web site for the archive. We expect to announce the new web site along with a number of other web-based features some time this Fall. We apologize that there is a gap in access to the emc-pstc archives. However, in the long run, we believe you will like the new site. At this new site, you will be able to access all emc-pstc messages, and you will be able to post messages from that site. You will be able to customize your subscription for the topics and authors of interest to you. You will be able to read the messages at the new site, or have them sent to your regular e-mail address. And, we have a number of other features that will enhance the value of this forum. If you are attending the IEEE EMC Symposium in Montreal, you will have an opportunity to preview our new web site. Check the bookmarks on the PCs in the Internet Cafe or look for Jim Bacher. If you have any questions, please contact me or Jim Bacher off-line. Best regards, Rich --- 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: ESD - time between successive discharges
I've been following this thread about ESD testing and the PPS debate. I would like to inject my point of view on the subject. So far most of what I have read addresses the need for speed. This is great for the test lab/house; to be able to slam through the process in a quest to get it done quick for the sake of process throughput, but for the purpose of determining if an EUT is immune to a pulse stimuli with respect to possible entry points, I remain skeptical. I suppose what I am alluring to is debugging for quality, but then, isnt the purpose of compliance testing to 'test to fail' rather than test to pass? This may depend on the lab itself. With the PPS issue, I submit that from at least the quality point of view it may depend on the type of product you are testing and the functional test program that the EUT is operating. For example, as an OEM (to a few of you out there) and direct mfr. we want to be as thorough as possible because we want to make a quality product and when we put CE on it, we mean it. We do not want our customer to find a problem with our products during their followup testing (not everyone retests a CE marked product). To ensure quality, we test our cabinet products for a full day or two in the ESD lab (much more if it fails). Many times we have student interns who do this, but sometimes our experienced lab techs do the job. Nevertheless, ESD testing (particularly on our disk arrays) is done very slowly because a rack mount version EUT can be loaded with up to 154 disk drives ranging in capacity from 9 to 180Gb while using a transfer block size ranging from 512 bytes to 256Kb. The result is massive overhead to response. The exercise program for a device such as this (we call it smash/hammer) performs a chained series of write/read/verify operations. The tasking packets may be buffered through a storage attached network (SAN) director and thus the operations can be lengthy and/or latent in the outcome reporting in the error daemon. The only way for our test personnel to determine if a failure has occurred is to monitor the screen of the EUT's host pc to visually verify no errors have occured before proceeding to the next zap. This can take seconds to minutes after a stimuli is applied. If such ESD testing were performed too rapidly, the operator can overlook a failure, and its location. There may be dozens of stimuli injection points to be tested and thus the relative location on the EUT where the failure event occurred can be overlooked. Fortunately, the standard has provision for variety.. Thank-You, Kyle Ehler KCOIQE mailto:kyle.eh...@lsil.com Assistant Design Engineer LSI Logic Corporation 3718 N. Rock Road U.S.A. Wichita, Kansas 67226 Ph. 316 636 8657 Fax 316 636 8321
Re: EMC Directives and Norway and MRA EU-Canada
Hi John, I do agree with your statement.The EFTA countries have to follow EU legislation and that is why the EMC directive is implemented into Norwegain law. But I still think there was some discussion about the Canada-EU MRA, which omitted the EFTA counties from the MRA, because they actually was not a part of EU and that both US and Canada did not want to include them into the agreement. Can any MRA experts give us a call and help us ? Best regards Amund Westin, Oslo/Norway On Mon, 6 Aug 2001 09:35:58 -0400 jradom...@clare.com wrote: Would this mean compliance to the EMC Directive demonstrated by testing by a CAB located in Canada does not give presumption of conformity for Norway? Guidelines on the application of Directive 89/336/EEC contains the following information: According to the agreement related to the European Economic Area (EEA) (Council and Commission Decision 94/1/EC of 13 December 1993 (OJEC n° L 1 of 3 January 1994, p. 1)) the territories of Liechtenstein, Iceland and Norway have to be considered, for the implementation of Directive 89/336/EEC, as part of the Community territory. The Community territory is therefore composed of 18 States for the purposes of this Directive. When this term, Community territory, is used in this guide, it is meant the EEA territory.. I hope this helps. John Radomski -- Get your firstname@lastname email for FREE at http://Nameplanet.com/?su --- 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: Heat Pump for use in Spas and Swimming Pools
The standard for swimming pool and spa equipment in the United States is UL 1563. The scope of the standard is available at the UL web site and it lists other relevant UL and National Electrical Code standards. http://ulstandardsinfonet.ul.com/scopes/1563.html IEC 60335-2-40 covers heat pumps, but I don't know if it specifies their use in pools and spas. IEC 60364-7-702 specifies the requirements for swimming pool and spa installations. Ted Eckert Regulatory Compliance Engineer American Power Conversion Corporation ted.eck...@apcc.com The items contained in this e-mail reflect the personal opinions of the writer and are only provided for the assistance of the reader. The writer is not speaking in an official capacity for APC nor representing APC's official position on any matter. Peter Merguerian pmerguer...@itl.co.ilTo: \EMC-PSTC (E-mail)\ Sent by: cc: owner-emc-pstc@majordomSubject: Heat Pump for use in Spas and Swimming Pools o.ieee.org 08/06/01 10:11 AM Please respond to Peter Merguerian Dear All, Anyone knows the applicable standards for heat pumps for use in swimming pools and spas? PETER S. MERGUERIAN Technical Director I.T.L. (Product Testing) Ltd. 26 Hacharoshet St., POB 211 Or Yehuda 60251, Israel Tel: + 972-(0)3-5339022 Fax: + 972-(0)3-5339019 Mobile: + 972-(0)54-838175 --- 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: EMC Directives and Norway
ofed1848a7.ef38121b-on85256aa0.0049d...@clare.com, jradom...@clare.com inimitably wrote: Guidelines on the application of Directive 89/336/EEC contains the following information: According to the agreement related to the European Economic Area (EEA) (Council and Commission Decision 94/1/EC of 13 December 1993 (OJEC n° L 1 of 3 January 1994, p. 1)) the territories of Liechtenstein, Iceland and Norway have to be considered, for the implementation of Directive 89/336/EEC, as part of the Community territory. The Community territory is therefore composed of 18 States for the purposes of this Directive. When this term, Community territory, is used in this guide, it is meant the EEA territory.. Yes, in spite of the Euro-English, that is valid. BUT the *administrative procedures* are NOT necessarily the same, even in EU members states, let alone in other EEA members. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co..uk This message and its contents are not confidential, privileged or protected by law. Access is only authorised by the intended recipient - this means YOU! The contents may be disclosed to, or used by, anyone and stored or copied in any medium. If you are not the intended recipient, please advise the sender yesterday at the latest. --- 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: TV nostalgia
95fbd8b0830ed511b7720002a51363f1319...@exw-ks.ks.lsil.com, Ehler, Kyle keh...@lsil.com inimitably wrote: Doug has touched on what I think would be a great tool for the EMI hunter...but rather than a 'sniffer', a 'goggle' similar to what Geordi wears that facilitates the direct viewing of EM radiation. Ideally, the device would allow adjustable band 'viewing' of the radiation frequency, intensity, polarity and propagation pattern(s). Yes, it sounds much more attractive than a sniffer, which would produce BAD smells around some equipment. And it isn't technically unfeasible. The problem is the poor resolution, even a microwave frequencies, due to the wavelength of the emission. At 150 kHz, the wavelength is 2 km, so only very BIG things are visible. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk This message and its contents are not confidential, privileged or protected by law. Access is only authorised by the intended recipient - this means YOU! The contents may be disclosed to, or used by, anyone and stored or copied in any medium. If you are not the intended recipient, please advise the sender yesterday at the latest. --- 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: RTTE Directive
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Courtland The RTTE Directive 1999/05/EEC states:- Article 2 - Definitions For the purpose of this Directive the following definitions shall apply: (b) telecommunications terminal equipment means a product enabling communication or a relevant component thereof which is intended to be connected directly or indirectly by any means whatsoever to interfaces of public telecommunications networks (that is to say, telecommunications networks used wholly or partly for the provision of publicly available telecommunications services); So equipment connected to any line provided by a public telecommunications operator (PTO) is within the scope of the RTTE. Only safety EMC specifications have been designated as mandatory for wire-line modems. If the modems are connected via wires which are also owned by the modems' owner and not by a PTO then the RTTE Directive does not apply but in that case the Safety EMC Directives still apply as the equipment is classed as Information Technology Equipment. The net effect is that the same (or very similar) specifications apply. Allan Carr Telecommunications Consultant AGC-Tel Consultants Ltd __ In article nebbijcjclfkanmapeickebmcfaa.ctho...@patton.com, Courtland Thomas ctho...@patton.com writes Hello Group, I have a problem is deciphering the RTTE Directive as far as what equipment qualifies. We manufacture many types of modems and some are designated as point to point. I understand that anything that connects to the public network falls under the directive, but what about point to point modems over twisted pairs. I am not speaking of leased lines, as they also fall under the RTTE. My concern is modems that connect point to point and can only be connected to others of their kind over distances of up to 7 miles. Is the RTTE meant to cover any connections that are controlled via a Central Office, whether it be public or leased? Thanks, Courtland Thomas Patton Electronics - -- Allan G.Carr B.Sc.(Elec.Eng) AMIEE | AGC-Tel Consultants Ltd Telecommunications Consultant | Tel: +44(0)141-956-2506 62 Crawford Road, Milngavie | Fax: +44(0)141-956-5347 Glasgow, G62 7LF, Scotland | http://www.agctel.co.uk -BEGIN PGP SIGNATURE- Version: PGPsdk version 1.7.1 iQA/AwUBO27Q4QtKq7OuRRPaEQK9UwCfUfLqPovNNcQm7odS9ZLKoExnX6kAn0/y 9uc5JcXBk2bxU1GujS7B1GG5 =psSZ -END PGP SIGNATURE- --- 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: FCC - radiated emission up to 10th harmonic
Cortland, If you were responding to my post re signals that don't leave the silicon, note that I pointed out that there is, at least in some cases, an output of the internal PLL which is not the advertised processor speed, but probably twice that, which is *only* used to generate the processor clock. In other words, your 1 GHz processor may have an internal PLL output of 2 GHz. [I'm basing all this on knowledge of one specific family of CPUs; others may not have this feature.] The only way you might know the actual PLL frequency is to dig into the hardware spec. of the device; many of the board designers won't know or care about this. I certainly agree that the processor clock itself is EMC important since that's what is driving all the internal bus switching and it's practically guaranteed that the harmonics will leak out onto the board etch (on bus lines even the power ground planes as common mode). Although, this hidden PLL output is certainly used per the FCC definition, I seriously doubt you will find any evidence of it with your receiver. I never have. Regardless, I do NOT recommend playing games with the rules. Regards, Jack -Original Message- From: Cortland Richmond [mailto:72146@compuserve.com] Sent: Saturday, August 04, 2001 6:40 PM To: ieee pstc list Subject: Re: FCC - radiated emission up to 10th harmonic During a previous life (heh!) we had applications for FCC grants returned without action because we had applied not for the on-chip frequency, but only for the distributed clock. Actually, testing will show that is the correct approach. A 1 GHz processor can radiate enough that a 66 MHz clock is certainly not the only thing you have to worry about. Cortland --- 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: TV nostalgia
Another thing you younger guys (and ladies) may not know is that Mad Man Muntz was essentially responsible for the 4 track (anyone remember those) and ultimately the 8 track stereos in cars. He was quite a marketer. Rick -Original Message- From: Price, Ed [mailto:ed.pr...@cubic.com] Sent: Monday, August 06, 2001 8:28 AM To: emc-p...@majordomo.ieee.org Subject: RE: TV nostalgia -Original Message- From: Rich Nute [mailto:ri...@sdd.hp.com] Sent: Thursday, August 02, 2001 3:36 PM To: emc-p...@majordomo.ieee.org Subject: TV nostalgia Okay... more nostalgia and a bit on safety back in those days... so that we don't stray too far from the subject matter of this forum. SNIP The one that won my respect was Muntz TV. It was CHEAP! When you looked inside the chassis, there was nothing there compared to the other TVs. They really knew how to take the cost out of the TV! Amazingly enough, its picture was among the best, and its reliability was indeed the best -- no parts to go bad! The company was owned by Mad Man Muntz, the classic Los Angeles used car dealer. SNIP Best regards, Rich Here's the anecdotal story I heard about the Man Man Muntz design technique. Muntz would commission a TV design, from professional TV engineers, since he was admittedly not a circuit designer. He would then attack the working prototype, removing one part at a time. If the TV still worked, he would remove another part. If he killed it, the part went back in, and he tried another part. Eventually, he was down to a low parts count. (Well, if it isn't true, it ought to be!) This resulted in a drifty, low sensitivity, noisy TV. But in those days, there were only a couple of VHF stations in any metro area. And the receivers were used within 10 miles or so of the transmitters. For their time, they were OK. But as people moved out to the suburbs, and more channels were used in a region, Muntz receivers began to show their problems. I try to get designers to emulate the Muntz technique for EMI control. It's a lot easier to have more EMI control components in your design, and remove a few of them during testing, than it is to have to add control components to your device. BTW, I remember that, in the mid 50's in Chicago, Muntz was really big on using skywriting advertising! Regards, Ed Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (Fax) Military Avionics EMC Services Is Our Specialty Shake-Bake-Shock - Metrology - Reliability Analysis --- 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,
Heat Pump for use in Spas and Swimming Pools
Dear All, Anyone knows the applicable standards for heat pumps for use in swimming pools and spas? PETER S. MERGUERIAN Technical Director I.T.L. (Product Testing) Ltd. 26 Hacharoshet St., POB 211 Or Yehuda 60251, Israel Tel: + 972-(0)3-5339022 Fax: + 972-(0)3-5339019 Mobile: + 972-(0)54-838175 --- 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: TV nostalgia
-Original Message- From: Rich Nute [mailto:ri...@sdd.hp.com] Sent: Thursday, August 02, 2001 3:36 PM To: emc-p...@majordomo.ieee.org Subject: TV nostalgia Okay... more nostalgia and a bit on safety back in those days... so that we don't stray too far from the subject matter of this forum. SNIP The one that won my respect was Muntz TV. It was CHEAP! When you looked inside the chassis, there was nothing there compared to the other TVs. They really knew how to take the cost out of the TV! Amazingly enough, its picture was among the best, and its reliability was indeed the best -- no parts to go bad! The company was owned by Mad Man Muntz, the classic Los Angeles used car dealer. SNIP Best regards, Rich Here's the anecdotal story I heard about the Man Man Muntz design technique. Muntz would commission a TV design, from professional TV engineers, since he was admittedly not a circuit designer. He would then attack the working prototype, removing one part at a time. If the TV still worked, he would remove another part. If he killed it, the part went back in, and he tried another part. Eventually, he was down to a low parts count. (Well, if it isn't true, it ought to be!) This resulted in a drifty, low sensitivity, noisy TV. But in those days, there were only a couple of VHF stations in any metro area. And the receivers were used within 10 miles or so of the transmitters. For their time, they were OK. But as people moved out to the suburbs, and more channels were used in a region, Muntz receivers began to show their problems. I try to get designers to emulate the Muntz technique for EMI control. It's a lot easier to have more EMI control components in your design, and remove a few of them during testing, than it is to have to add control components to your device. BTW, I remember that, in the mid 50's in Chicago, Muntz was really big on using skywriting advertising! Regards, Ed Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (Fax) Military Avionics EMC Services Is Our Specialty Shake-Bake-Shock - Metrology - Reliability Analysis --- 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: CEN home page
Hello Amund, It's working this morning (accessed from the USA). Try again. Best 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 -- On 6 Aug 2001 am...@westin.org wrote: The CEN web-site (www.cenorm.be) has been down for many days. Do you know that is going on ? Best regards Amund Westin, Oslo/Norway -- Get your firstname@lastname email for FREE at http://Nameplanet.com/?su --- 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: EMC Directives and Norway
Would this mean compliance to the EMC Directive demonstrated by testing by a CAB located in Canada does not give presumption of conformity for Norway? Guidelines on the application of Directive 89/336/EEC contains the following information: According to the agreement related to the European Economic Area (EEA) (Council and Commission Decision 94/1/EC of 13 December 1993 (OJEC n° L 1 of 3 January 1994, p. 1)) the territories of Liechtenstein, Iceland and Norway have to be considered, for the implementation of Directive 89/336/EEC, as part of the Community territory. The Community territory is therefore composed of 18 States for the purposes of this Directive. When this term, Community territory, is used in this guide, it is meant the EEA territory.. I hope this helps. John Radomski --- 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: ESD - time between successive discharges
Our rule is 1 second per discharge, 10 discharges, both polarities, per discharge point. Of course the test personnel also strafe the unit at 20 pulses/second in order to detect any vulnerability that may need to be exploited. -Original Message- From: Cortland Richmond [mailto:72146@compuserve.com] Sent: Saturday, August 04, 2001 8:40 PM To: ieee pstc list Subject: Re: ESD - time between successive discharges This has come up everywhere I've worked. In order to adequately test for vulnerability, logically, one has to apply a discharge during each of the operating conditions an equipment might take. Given the number of different logical states a microprocessor-controlled EUT might use, this could take forever! From the standpoint of doing a conscientious test, it would be desirable to test MORE often than once per second. But because the real-world ESD event is an isolated one, repeated discharges are not a realistic test. Also, many devices incorporate built-in ESD protection using protective parts of limited dissipation, and it is possible testing TOO often will destroy the protection circuit. Once per second turns out to be a compromise, and one which may be followed without being too persnickety. What about a longer interval? Sure -- provided we test all of the logic states that might be latched up by the discharge! Ten discharges per point, plus and minus, at each of the voltage levels prescribed, will probably turn up enough of them to pin down a susceptible device no matter WHAT the interval is. One hour? Well, if you can afford to do thirty hours of test, you can do three points at ONE voltage level. One minute? Still takes a long time. And let's face it; this is mind-numbing work. So one second seems to ME to be just about right. Let the poor tech -- or the poor engineer! -- take a break once in a while! I'll add that there may be failure modes that take longer than one second to show up. You want to do the test in such a way that the tester can note and adjust to this; I once tested something that had a 30 second delay before a failure showed up. This can't be helped, and, in this particular case, one second is far too often. Cortland Richmond --- 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: TV nostalgia
Doug has touched on what I think would be a great tool for the EMI hunter...but rather than a 'sniffer', a 'goggle' similar to what Geordi wears that facilitates the direct viewing of EM radiation. Ideally, the device would allow adjustable band 'viewing' of the radiation frequency, intensity, polarity and propagation pattern(s). A rig like this could add a pc for compliance recognition/cataloging and perhaps someday eliminate the need for OATS, TEM cells and other investigatinve methods. The system could also harass on a per sample basis in situ mfg. product. -kyle, KC0IQE -Original Message- From: Doug McKean [mailto:dmck...@corp.auspex.com] Sent: Friday, August 03, 2001 8:40 PM To: EMC-PSTC Discussion Group Subject: Re: TV nostalgia snip Now, if we could just train ourselves to sniff out some of those pesky EMI problems ... - Doug McKean
CEN home page
The CEN web-site (www.cenorm.be) has been down for many days. Do you know that is going on ? Best regards Amund Westin, Oslo/Norway -- Get your firstname@lastname email for FREE at http://Nameplanet.com/?su --- 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: EMC Directives and Norway
Dear Dan, I think the MRA between EU and Canada only includes the 15 EU countries, and not the EFTA countries like Norway, Iceland, Liechtenstein and Switzerland. That is why you do not find any CABs from these EFTA countries. Anyway, Norway will accept certificates from a Canadian CAB which is listed under the recognized MRA CABs. Regarding to radio equipment which falls inside the RTTE-directive, remember to fill in the Notification and send it to the Norwegian Radio authorities. If you need the document, I can help you. Best regards Amund Westin, Oslo,Norway On Thu, 02 Aug 2001 14:46:19 -0700 Dan Kwok dk...@intetron.com wrote: Compliance colleagues: I am working with a Canadian customer who is exporting satellite equipment to Europe. In reviewing the Mutual Recognition Agreement (MRA) between Canada and the EC, I noted Norway, along with a couple of other European countries do not indicate a designated authority for the designation of Conformity Assessment Bodies (CAB) in their countries. With other countries (Italy, France, UK etc..) in the EC, it is my understanding we can test for conformity using an approved CAB in Canada in accordance to the MRA, then the equipment can be CE marked. Would this mean compliance to the EMC Directive demonstrated by testing by a CAB located in Canada does not give presumption of conformity for Norway? I also understand the Canadian CAB may also issue type-examination certificates for radio transmitters to be placed in the European Community. Is there a different set of rules for placing radio transmitters in Norway, Liechtenstein and Iceland? Any insights on this would be greatly appreciated. Dan Kwok Intetron Consulting Inc. --- 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, -- Get your firstname@lastname email for FREE at http://Nameplanet.com/?su --- 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,
