Emissions from incidental radiators (ex. DC brush motors) may be disregarded when testing to show compliance with the emission standards. By definition an incidental radiator is subject to the general requirements of FCC Part 15 regulations (15.5 & 15.13). If the motor is driven by digital circuitry, then it is not an incidental radiator and must meet the Part 15 technical requirements.
Refer to https://www.fcc.gov/oet/ea/rfdevice , KDB 324861 and KDB 129354. Bill From: McCallum, Andy [mailto:[email protected]] Sent: Tuesday, November 22, 2016 9:21 AM To: [email protected] Subject: Re: [PSES] Incidental Radiators per FCC Part 15 Grace No a compliant report should not be issued. You will need to investigate the problem with the DC motor and resolve the issue. Regards Andy From: Grace Lin [mailto:[email protected]] Sent: 22 November 2016 14:46 To: [email protected]<mailto:[email protected]> Subject: [PSES] Incidental Radiators per FCC Part 15 Dear Members, Could you please comment how incidental radiators be handled in a test report? FCC 15.3 defines "Incidental radiator" as "A device that generates radio frequency energy during the course of its operation although the device is not intentionally designed to generate or emit radio frequency energy. Examples of incidental radiators are dc motors, mechanical light switches, etc." FCC 15.3 (Incidental radiators) states "Manufacturers of these devices shall employ good engineering practices to minimize the risk of harmful interference." Take a paper dispenser as an example. Test data with the DC motor running did not comply with the Class A/B limits. Test data without the DC motor running complies with the Class B limits. Should a compliant test report be issued? Thank you very much for your time and I look forward to hearing from you. Best regards, Grace Lin - ---------------------------------------------------------------- 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]<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]<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]>
