And one needs to provide proof of compliance to the Essential Requirements to the directive by using your [1] or [2]. Leaving that out suggests a route too easy to be true...
Regards, Ing. Gert Gremmen ce-test, qualified testing bv Van: emc-p...@ieee.org [mailto:emc-p...@ieee.org] Namens Haynes, Tim (SELEX GALILEO, UK) Verzonden: Monday, November 03, 2008 10:46 AM Aan: John Woodgate; emc-p...@ieee.org Onderwerp: RE: Radiated Emission Measurements above 1GHz John, All, Sorry - I was wrong to suggest that standards should be found that would cover frequencies above 1GHz - because ALL harmonised standards under the EMC Directive are voluntary so there is no legal requirement to apply harmonised standards. Under 2004/108/EC it IS a legal requirement to make an EMC Assessment. The assessment might be done by 1 applying harmonised standards and, if you do so, you may presume conformity with the protection (or essential) requirements 2 making a full EMC assessment of the apparatus (using any available method including modelling and calculation, which may include using standards whether harmonised or not). Either 1 or 2 (or a combination) constitutes "an EMC assessment". In either case, having completed the assessment [to your own satisfaction] you may declare conformity with the protection requirements using the evidence from the assessment. By not looking at an extended frequency range for emission and immunity, when you know the design employs technology in the extended frequency range, the manufacturer carries an unquantified risk. It is always preferable for the manufacturer to identify and (if possible) quantify the risk so that it may be mitigated if it is too high. As the banks and financial institutions have discovered, taking too much risk can seriously damage the business. Where would you rate a company who cannot be bothered to identify the risk at all? Regards Tim ************************ Tim Haynes A1N10 Electromagnetic Engineering Specialist SELEX Sensors and Airborne Systems 300 Capability Green Luton LU1 3PG Tel : +44 (0)1582 886239 Fax : +44 (0)1582 795863 Mob : +44 (0)7703 559 310 E-mail : tim.hay...@selexgalileo.com Please consider the environment before printing this email. There are 10 types of people in the world-those who understand binary and those who don't. J. Paxman From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of John Woodgate Sent: Friday, October 31, 2008 1:48 PM To: emc-p...@ieee.org Subject: Re: Radiated Emission Measurements above 1GHz *** WARNING *** This mail has originated outside your organization, either from an external partner or the Global Internet. Keep this in mind if you answer this message. In message <201048ea81ba0745aca78e4cc8839001037cf...@desmdswms201.des.grplnk.net>, dated Fri, 31 Oct 2008, "Haynes, Tim (SELEX GALILEO, UK)" <tim.hay...@selexgalileo.com> writes: >Remember that when you apply a standard you are doing so on the basis >that the standard covers ALL the product EMC characteristics. > >IF you design a PC with a 3GHz clock and only apply a standard with a >1GHz limit and then there is a problem with real interference at 3GHz, >the authorities may not believe that due diligence had been applied. > >So I would start asking - what does the product do - and then find >standards that may be useful in making your EMC assessment. In almost all circumstances there is NO legal requirement in Europe to do this. If the applicable product standard does not cover a particular frequency range, the committee concerned saw no need for limits in that range, and by notifying the standard in the OJEC, the Commission has accepted that the standard gives prima facie evidence of complying with the Directive. You DO NOT have to trawl though all the EMC standards that exist, looking for another one to apply, almost certainly OUTSIDE ITS SCOPE. However, self-interest may suggest that if you know of any EMC effect not covered by the applicable standards, you should consider how to test and what VOLUNTARY limits to apply. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Either we are causing global warming, in which case we may be able to stop it, or natural variation is causing it, and we probably can't stop it. You choose! John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.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...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc SELEX Sensors and Airborne Systems Limited Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 3EL A company registered in England & Wales. Company no. 02426132 ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.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...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.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...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
