Hello Charlie Thanks a lot! Now it's much clearer to me.
Best regards Paolo On Tue, Dec 21, 2021 at 9:01 PM Charlie Blackham < char...@sulisconsultants.com> wrote: > 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/ <https://sulisconsultants.com/> * > > Registered in England and Wales, number 05466247 > > > > *From:* Paolo Roncone <paoloc...@gmail.com> > *Sent:* 21 December 2021 12:24 > *To:* EMC-PSTC@LISTSERV.IEEE.ORG > *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 <david.schae...@element.com> > 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, > > > > > > *David Schaefer*** > > Technical Manager > > Element Materials Technology > > 9349 W Broadway Ave > > Brooklyn Park > > , > > MN > > 55445 > > , > > United States > > O *+1 612 638 5136* <+1%20612%20638%205136> > > ext. 10461 > > *david.schae...@element.com* <david.schae...@element.com> > > www.element.com > > > <https://www.linkedin.com/organization-guest/company/element-materials-technology?challengeId=AQFf9AemZ4SobwAAAXOQwivOsnkHiTt2ByoCkOxVQjOGOjRlivicVgYlN1dz5QXjId9bpa0keWzfVxhl8KPj78uD6-S6nfqRsg&submissionId=e49e0dc0-96a3-2516-27fa-ee2e8c42b177> > > <https://twitter.com/ElementTesting/> > > <https://elementmaterials.eu.qualtrics.com/jfe/form/SV_3xQqm84s6IydI5D> > > *From:* Paolo Roncone [mailto:paoloc...@gmail.com] > *Sent:* Tuesday, December 21, 2021 5:32 AM > *To:* EMC-PSTC@LISTSERV.IEEE.ORG > *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: 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: 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 < > 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>
