Dennis
And why not – seriously? As was said many years ago – and often repeated! - “what’s right for the goose is right for the gander”. In this case (and many others) In simple terms, that means that implies that electronic devices need to be appropriately resilient to the generally “predictable” levels of external interference in the environments for which they are designed to operate – one of the basic essential requirements of the EMC Directive! Otherwise you might need to specify that YOUR products need to have MIL-STD-461 levels (highest!) of immunity to try to ensure they will work “anywhere” they are likely to be used! John E Allen W. London, UK From: dward [mailto:dw...@pctestlab.com] Sent: 29 September 2016 21:53 To: 'john Allen'; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] [RFI] Part 15 isn't enough.. Not a chance Dennis Ward This communication and its attachements contain information from PCTEST Engineering Laboratory, Inc., and is intended for the exclusive use of the recipient(s) named above. It may contain information that is confidential and/or legally privileged. Any unauthorized use that may compromise that confidentiality via distribution or disclosure is prohibited. Please notify the sender immediately if you receive this communication in error, and delete it from your computer system. Usage of PCTEST email addresses for non-business related activities is strictly prohibited. No warranty is made that the e-mail or attachments(s) are free from computer virus or other defect. Thank you. From: john Allen [mailto:john_e_al...@blueyonder.co.uk] Sent: Thursday, September 29, 2016 1:27 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] [RFI] Part 15 isn't enough.. Almost sounds like a call for N. America to encompass our equivalent immunity requirements (often denigrated - even with Europe, but they generally do seem to work!) J John E Allen W. London, UK -----Original Message----- From: Ghery S. Pettit [mailto:n6...@comcast.net] Sent: 29 September 2016 21:14 To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] [RFI] Part 15 isn't enough.. Preventing harmful interference in all cases is a mighty tough call. How low do you need to limit emissions? How high a signal must the product be immune to? The limits in Part 15 provide a reasonable level of protection, assuming the potential victim is far enough away. Co-located devices may need more suppression. Ghery S. Pettit, NCE -----Original Message----- From: Cortland Richmond [ <mailto:k...@earthlink.net> mailto:k...@earthlink.net] Sent: Thursday, September 29, 2016 12:29 PM To: <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] [RFI] Part 15 isn't enough.. On 9/29/2016 2:07 PM, Ken Javor wrote: > I missed out on the prologue and am curious as why Part 15 limits > aren't low enough. Not low enough for what? Actually preventing harmful interference. Requiring a warranty in the purchase contract would put manufacturers on notice that they're actually expected to do that -- and eat the cost of fixing things if they don't. § 15.5 General conditions of operation. (b) Operation of an intentional, unintentional, or incidental radiator is subject to the conditions that no harmful interference is caused and that interference must be accepted that may be caused by the operation of an authorized radio station, by another intentional or unintentional radiator, by industrial, scientific and medical (ISM) equipment, or by an incidental radiator. § 15.15 General technical requirements. (c) Parties responsible for equipment compliance should note that the limits specified in this part will not prevent harmful interference under all circumstances. Since the operators of part 15 devices are required to cease operation should harmful interference occur to authorized users of the radio frequency spectrum, the parties responsible for equipment compliance are encouraged to employ the minimum field strength necessary for communications, to provide greater attenuation of unwanted emissions than required by these regulations, and to advise the user as to how to resolve harmful interference problems (for example, see §15.105(b)). [and (maybe -- good luck)] § 15.17 Susceptibility to interference. (a) Parties responsible for equipment compliance are advised to consider the proximity and the high power of non-Government licensed radio stations, such as broadcast, amateur, land mobile,and non-geostationary mobile satellite feeder link earth stations, and of U.S. Government radio stations, which could include high-powered radar systems, when choosing operating frequencies during the design of their equipment so as to reduce the susceptibility for receiving harmful interference. ... Cortland - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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To post a message to the list, send your e-mail to < <mailto:emc-p...@ieee.org> emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: <http://www.ieee-pses.org/emc-pstc.html> 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/> http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: <http://www.ieee-pses.org/> http://www.ieee-pses.org/ Instructions: <http://www.ieee-pses.org/list.html> http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: <http://www.ieee-pses.org/listrules.html> http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas < <mailto:sdoug...@ieee.org> sdoug...@ieee.org> Mike Cantwell < <mailto:mcantw...@ieee.org> mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: < <mailto:j.bac...@ieee.org> j.bac...@ieee.org> David Heald: < <mailto:dhe...@gmail.com> 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://www.ieee-pses.org/list.html (including how to unsubscribe) <http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> 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://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
