FW: Canada GSM specification
Hello all, I'm hearing Canada might have come out with a new 800MHz GSM specification? Can anyone lead me to a web site that shows this new information? Thanks for your help, Michael Sundstrom NOKIA TCC Dallas / EMC ofc: (972) 374-1462 cell: (817) 917-5021 amateur call: KB5UKT --- 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: CE MARKING A SYSTEM
I read in !emc-pstc that rehel...@mmm.com wrote (in of0b8a9efb.3bd0b2ca-on86256bac.00399...@mmm.com) about 'CE MARKING A SYSTEM', on Wed, 1 May 2002: Contrary to popular opinion, the TCF route is not designed to get around standards. Indeed. It is intended, in one instance, to accommodate circumstances in which the application of the standards leads to an anomalous situation. The Notified Bodies are taken to be sufficiently skilled to determine when and how an anomalous situation can be resolved. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! --- 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
immunity of a pwb as a function of grounding
Hi All, I have been busy again setting up experiments and taking data on a circuit board that indicates a design rule for ESD that I have heard from many sources does not work. I knew this was the case, but thought some data was in order. This month, the Technical Tidbit at http://emcesd.com (or alternately http://www.dsmith.org) investigates the effect of board connections to a metal plane on its response to ESD. Scroll down to the bottom of the index page to link to the article. This article builds on the results of the April Technical Tidbit article where an oscillator was used as the excitation of a board over a metal plane. A circuit board from a disk drive was mounted near a metal plane and measurements of currents in connections to the plane were taken when the plane was excited by an ESD event. The results are dramatic and a major design rule about grounding circuit boards for immunity is shown to be ineffective. This article shows in a different way how strong the coupling between a board and a nearby metal plane is. At first I tried to use a small surface current probe for the measurement, but a null experiment showed that it was too sensitive to electric fields so I used a shielded square magnetic loop to make the measurement. Doug -- --- ___ _ Doug Smith \ / ) P.O. Box 1457 = Los Gatos, CA 95031-1457 _ / \ / \ _ TEL/FAX: 408-356-4186/358-3799 / /\ \ ] / /\ \ Mobile: 408-858-4528 | q-( ) | o |Email: d...@dsmith.org \ _ /]\ _ / Website: http://www.dsmith.org --- --- 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: NEC Questions
Richard - Bob Johnson's response on your Q1 is on the money. wrt your Q2 and outlet strips, there may be the additional consideration that you may impinge on the scope of UL1363, Relocatable Power Taps (formerly a desk standard for Temporary Power Taps), Listed under the CCN XBYS. Point being, the final assembled product may have to comply with UL1363, with the internal measurement device having requirements from UL3111-1. [This was the case for relocatable power taps that incorporated secondary protection for telecommunications circuits, where the latter, internal components were required to comply with UL497A.] Regards, Peter L. Tarver, PE Product Safety Manager Sanmina-SCI Homologation Services San Jose, CA peter.tar...@sanmina-sci.com -Original Message- From: Richard Meyette Sent: Tuesday, April 30, 2002 10:05 AM I have a couple of questions regrading the National Electrical Code: 2) Consider the same power measuring circuit installed into a direct plug-in (NEMA 5-15P) with a single outlet receptacle (NEMA 5-15R) or into an outlet strip with a 16 AWG power cord with several outlet receptacles. Assuming that the measuring circuit is provided with a suitable fuse for overcurrent protection, are the outlet receptacles required to be protected by a 15 A fuse or circuit breaker in the device or can they rely on the circuit breaker for the branch circuit for overcurrent protection? The UL product standard for this device is UL 3111-1 (Electrical Measuring and Test Equipment), which is harmonized with IEC 61010-1, requires an overcurrent protector to be fitted within the equipment for all devices connected to the mains supply (9.6.2). There are no US deviations in this standard that would allow the circuit breaker to provide this protection, so based on this I would assume that a 15 A circuit breaker of fuse would be required for the NEMA 5-15R receptacles. I would also assume that a 20 A overcurrent protector would be required for a NEMA 5-20R outlet receptacle. However, the UL product standard for household appliances (UL 60335-1) does have a US deviation to a similar requirement for overcurrent devices (19.1, Note 2) that states the The PROTECTIVE DEVICE in the fixed wiring does not provide the necessary protection. However, the US deviation states The circuit protection device is permitted to provide necessary protection. If I am interpreting this correctly, a household appliance in the USA could rely on the panel breaker for overcurrent protection. Any comments? Thanks in advance for anyone willing to wade through this and send me a response. Richard A. Meyette. PE meye...@pacbell.net --- 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 --- 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: EXTENDING UPPER FREQUENCY LIMIT FOR RADIATED MEASUREMENTS
Ian, Work is progressing in CISPR SC I to amend CISPR 22 to have limits to as high as 18 GHz. This will not happen overnight, however. A committee draft (CD) document is out for comment within the national committees. I expect that it will be a hot topic of discussion at the SC I meetings in Christchurch, New Zealand in late September. From that meeting there will likely be a committee draft for vote (CDV) that will come out for a 5 month voting period. If it passes, we will be discussing the comments at the SC I meeting in South Korea next year. After than, the final draft international standard (FDIS) document will go out for vote (another 5 month period). If that passes, the changes will be implemented in the next amendment or full edition of CISPR 22. Confused? The bottom line is that, assuming everything goes smoothly for the current proposal (and we've already voted down one FDIS), 2004 is the earliest that a change to CISPR 22 could be published. Then you would be looking at some time before CENELEC put out their new version of EN 55022:1998 and then a 2 year transition period would start. 2006 at the earliest. There are no proposals to increase the frequency range for radiated immunity tests in CISPR 24 at this time. Keep in mind that these standards apply to ITE. They do not apply to other product families. Hope this helps. Keep in mind that for the U.S. you may already have to test radiated emissions to as high as 40 GHz, depending upon the maximum clock speed in your product. CISPR is playing catch-up in this area. Ghery Pettit Intel Member, CISPR SC I WG2, WG3 and WG4 -Original Message- From: Gordon,Ian [mailto:ian.gor...@edwards.boc.com] Sent: Wednesday, May 01, 2002 6:14 AM To: 'IEEE EMC SAFETY PSTC' Subject: EXTENDING UPPER FREQUENCY LIMIT FOR RADIATED MEASUREMENTS I was recently told that the upper limit for radiated emission/immunity testing of non-telecomm equipment was to be raised to 3GHz. Can anyone confirm this and if so, are there plans to amend the European generic standards? Thanks Ian Gordon _ This message has been checked for all known viruses by UUNET delivered through the MessageLabs Virus Control Centre. For further information visit http://www.uk.uu.net/products/security/virus/ --- 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 --- 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: Australian Telecom Surge testing
The 10/700us waveform called out by IEC 61000-4-5 is essentially the same as the 9/720us waveform called for by FCC. Both require circuits based on old CCITT documents. There are some generators on the market that will meet both requirements (tolerances for each allow for the overlap). Older generators designed to meet only the CCITT or IEC specification may not also meet the 9/720us requirements of FCC. Both specify a 20uF energy storage capacitor for this waveform... Hope this helps... Mike Hopkins Thermo KeyTek -Original Message- From: John Cronin [mailto:croni...@hotmail.com] Sent: Tuesday, April 30, 2002 6:30 PM To: emc-p...@majordomo.ieee.org Subject: Australian Telecom Surge testing Hi group Can anyone tell me offhand whether the surge test requirement for Australia is to IEC 1000-4-5 which uses a network with a 1 uF source capacitor or is it similar to the FCC test which I believe uses a 20 uF capacitor. Best Regards John Cronin _ Join the world's largest e-mail service with MSN Hotmail. Click http://g.msn.com/1HM105301/46 Here --- 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
EXTENDING UPPER FREQUENCY LIMIT FOR RADIATED MEASUREMENTS
I was recently told that the upper limit for radiated emission/immunity testing of non-telecomm equipment was to be raised to 3GHz. Can anyone confirm this and if so, are there plans to amend the European generic standards? Thanks Ian Gordon _ This message has been checked for all known viruses by UUNET delivered through the MessageLabs Virus Control Centre. For further information visit http://www.uk.uu.net/products/security/virus/ --- 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
CE RTTE Directive Radio Required Standards for VHF/UHF Products
Hi All, 1. The subject products have the following main chatracteristics: 1.1. Application: Transmission of alarm detectors' data to remote monitoring centers. 1.2. Operated in fixed locations. 1.3. RF output power: 2.5-5W. 1.4. The products have the following frequency ranges: a. 136-156MHz b. 154-174MHz c. 400-435MHz d. 435-470MHz 2. Please advise, what is/are the applicable CE RTTE Standard/s? All assistance is appreciated. Regards Yuri Mordukhovitch EMC Engineer EMC Laboratory ITL (Product Testing) Ltd. Kfar Bin Nun Israel Tel: +972-8-9797799 Fax: +972-8-9797702 Email: yu...@itl.co.il http://www.itl.co.il http://www.i-spec.com This e-mail message may contain privileged or confidential information. If you are not the intended recipient, you may not disclose, use, disseminate, distribute, copy or rely upon this message or attachment in any way. If you received this e-mail message in error, please return by forwarding the message and its attachments to the sender. --- 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: CE MARKING A SYSTEM
Contrary to popular opinion, the TCF route is not designed to get around standards. Bob Heller 3M Product Safety, 76-1-01 St. Paul, MN 55107-1208 Tel: 651- 778-6336 Fax: 651-778-6252 === John Woodgate jmw@jmwa.demon To: emc-p...@majordomo.ieee.org .co.uk cc: (bcc: Robert E. Heller/US-Corporate/3M/US) Subject: Re: CE MARKING A SYSTEM 04/30/2002 08:55 AM Please respond to John Woodgate I read in !emc-pstc that Gordon,Ian ian.gor...@edwards.boc.com wrote (in E1BA0362B28ED211A1E80008C71EA30601818F4F@EXC_EAS01) about 'CE MARKING A SYSTEM', on Tue, 30 Apr 2002: Can anyone advise the course of action in applying a CE mark as regards EMC to a system some of whose component parts are not built by us and whose D of C's claim light industrial immunity. However, the system has been running in very harsh environments e.g. plasma etch applications at customer sites and we wish to claim industrial level immunity for the system. The system is obviously fit for purpose in the intended environment. We have performed radiated testing to this level on the whole system. Unfortunately if we surge test these light industrial components which form part of the system we are certain they will fail at the appropriate levels. One component is an industrial PC. Does anybody have any suggestions as to what action to take to allow us to apply the CE mark and claim industrial immunity? If you are sure it won't pass the normal industrial immunity tests, but is fit for purpose and thus you don't want to have to make it conform, you have to use the Technical File route. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! --- 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 --- 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
