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. 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>
