Thanks to all for the quick education!
Now, follow up question: RED. Seems to me that this does use RF to communicate, so it seems to fall into scope of RED. Agree? Disagree? thanks, Mike > Re: [PSES] NFC (near field communication): FCC Approach?On October 20, 2018 > at 2:40 AM Michael Derby <[email protected]> wrote: > > > I agree with Michael that this needs to be tested and authorised > (certified) to FCC 15.225. > > > > > > Another Michael. > > > > > > > > > > From: Heckrotte, Michael [mailto:[email protected]] > Sent: 20 October 2018 04:00 > To: [email protected] > Subject: Re: [PSES] NFC (near field communication): FCC Approach? > > > > Digital devices that have a power consumption not exceeding 6 nW are > exempt from specific technical standards per FCC Rules 15.103(f). > > > > There are no such exemptions for intentional radiators. See FCC Rules > 15.225 for radiated emission limits applicable to radio devices operating on > 13.56 MHz. > > > > > > Best Regards, > > Mike > > > > From: Ken Javor <[email protected] > mailto:[email protected] > > Sent: Friday, October 19, 2018 5:54 PM > To: [email protected] mailto:[email protected] > Subject: Re: [PSES] NFC (near field communication): FCC Approach? > > > > I don’t know what the FCC rules are on something like this – others on > this forum are much better informed on that topic - but if the ERP is 0 dBm > (1 mW), then at three meters away the field intensity would be 58 mV/m, or 95 > dBuV/m. Now this is at 13.56 MHz, where there is no FCC RE limit. But the > FCC Class B three meter limit at 30 MHz is something like 40 dBuV/m (someone > jump in if I got this wrong) so that means the third harmonic must be 55 dB > down from the fundamental. That is certainly doable, but I wouldn’t take it > for granted without some sort of verification. > > Ken Javor > Phone: (256) 650-5261 > > > > --------------------------------------------- > > From: MIKE SHERMAN <[email protected] mailto:[email protected] > > Reply-To: MIKE SHERMAN <[email protected] > mailto:[email protected] > > Date: Fri, 19 Oct 2018 17:22:50 -0500 > To: <[email protected] mailto:[email protected] > > Subject: [PSES] NFC (near field communication): FCC Approach? > > Esteemed fellow listers -- > > > > I'm looking at a very low power, intermittent NFC card reader/writer. > Alkaline battery operated device. NFC is only energized for 10 seconds at a > time on demand, and range to read/write is less than 1 cm from the surface of > the device. > > > > I'm not an EE, but my simplified thought process is: "I can barely get > this to couple magnetically with a card sitting on its surface. How could I > possibly interfere with broadcast services or other equipment?" > > > > So, oh wise ones, from your experience what actions with respect to FCC > are reasonable to do? For example, radiated emissions testing seems to me > like a total waste of time and money. > > > > More technical details: maximum input power to the NFC chip is 17 mW. > Chip is coupled to a flat 30mm x 40mm "NFC Ferrite Antenna (13.56 MHz)" that > my EE describes as "zero gain." We're rating RF output as 0 mW (i.e., > rounding off, it's a lot closer to 0 mW than to 1 mW). > > > > Looking forward once again to interesting wisdom from this group. > > > > Mike Sherman > > Graco Inc. > - > ---------------------------------------------------------------- > > 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> > 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 e-mail may contain privileged or confidential information. If you > are not the intended recipient: (1) you may not disclose, use, distribute, > copy or rely upon this message or attachment(s); and (2) please notify the > sender by reply e-mail, and then delete this message and its attachment(s). > Underwriters Laboratories Inc. and its affiliates disclaim all liability for > any errors, omissions, corruption or virus in this message or any attachments. > > - > ---------------------------------------------------------------- > > 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]>
