Paolo I would recommend FCC KDB 996369 D04 Module Integration Guide V02 https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?id=44637&switch=P
§ 15.33(a) gives you an upper frequency of 12.5 GHz for part 15B “emc” emissions § 15.33(b) gives you an upper frequency of 25 GHz for part 15C “radio spurious” emissions Best regards Charlie Charlie Blackham Sulis Consultants Ltd Tel: +44 (0)7946 624317 Web: https://sulisconsultants.com/ Registered in England and Wales, number 05466247 From: Paolo Roncone <[email protected]> Sent: 21 December 2021 12:24 To: [email protected] Subject: Re: [PSES] FCC Part 15 - Frequency range of radiated emissions Hi David Thanks for the reply You mean both EMI and Radio must cover up to 10× BT module frequency? Thanks again Paolo On Tue, Dec 21, 2021, 13:05 David Schaefer <[email protected]<mailto:[email protected]>> wrote: Paolo, You are correct. Part 15.33 requires 10x the highest frequency, including the radio. https://www.ecfr.gov/current/title-47/chapter-I/subchapter-A/part-15 § 15.33 Frequency range of radiated measurements. (a) For an intentional radiator, the spectrum shall be investigated from the lowest radio frequency signal generated in the device, without going below 9 kHz, up to at least the frequency shown in this paragraph: (1) If the intentional radiator operates below 10 GHz: to the tenth harmonic of the highest fundamental frequency or to 40 GHz, whichever is lower. Thanks, [cid:[email protected]] David Schaefer Technical Manager Element Materials Technology 9349 W Broadway Ave Brooklyn Park , MN 55445 , United States O +1 612 638 5136<tel:+1%20612%20638%205136> ext. 10461 [email protected]<mailto:[email protected]> www.element.com<http://www.element.com> [cid:[email protected]]<https://www.linkedin.com/organization-guest/company/element-materials-technology?challengeId=AQFf9AemZ4SobwAAAXOQwivOsnkHiTt2ByoCkOxVQjOGOjRlivicVgYlN1dz5QXjId9bpa0keWzfVxhl8KPj78uD6-S6nfqRsg&submissionId=e49e0dc0-96a3-2516-27fa-ee2e8c42b177> [cid:[email protected]]<https://twitter.com/ElementTesting/> [cid:[email protected]]<https://elementmaterials.eu.qualtrics.com/jfe/form/SV_3xQqm84s6IydI5D> From: Paolo Roncone [mailto:[email protected]<mailto:[email protected]>] Sent: Tuesday, December 21, 2021 5:32 AM To: [email protected]<mailto:[email protected]> Subject: [PSES] FCC Part 15 - Frequency range of radiated emissions CAUTION:This email originated from outside of Element Materials Technology. DO NOT click links or open attachments unless you recognize the sender and know the content is safe. Please contact IT Service Desk if you are in any doubt about this email. Hi all, an EUT with built-in Bluetooth 2.4 GHz module must be tested - as any electrical/electronic equipment sold in the USAm to FCC requirements for EMI. Questions: 1. What is the frequency range of EMI radiated emissions for the EUT in question? According to § 15.33 of Part 15: https://www.ecfr.gov/current/title-47/chapter-I/subchapter-A/part-15#15.33 [image.png] My understanding is that the above mentioned EUT must be tested up to at least 10 x 2.4 GHz = 24 GHz for radiated emissions, with the limits specified in § 15.109 (Field strength in uVolts/m). 2. Does it make any difference wrt question 1 (EMI frequency range), if the 2.4G Bluetooth module is already covered by a Declaration of conformity or certified according to FCC 47 CFR Part 2 Subpart J (spurious emissions, or Radio tests) ? https://www.ecfr.gov/current/title-47/part-2/subpart-J According to a colleague of mine, if the Bluetooth module is already Radio tested and/or certified, we may test the subject EUT as an "unintentional radiator" (Subpart B), excluding the 2.4 GHz and the 10x rule, but using the 5x highest frequency rule for unintentional radiators as the radiated EMI range. [image.png] I'm not at all convinced.. I hope someone in this forum can clarify this. Thanks a lot in advance and happy holidays! Paolo - ---------------------------------------------------------------- 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 <[email protected]<mailto:[email protected]>> 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 <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> - ---------------------------------------------------------------- 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 <[email protected]> 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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
