“Best effort and engineering judgement”. I like the sound of that.
From: Marko Radojicic [mailto:[email protected]] Sent: Friday, February 22, 2019 12:39 AM To: Jim Hulbert <[email protected]> Cc: [email protected] Subject: **External**Re: [PSES] FCC Part 15 Testing in Situ Hi Tried this once and the ambients confounded the measurements and this was well before Wi-Fi, IOT, and widespread use of cellphones. The digital thermometer on the wall was significantly above the part 15 limit! Even desk phones and copiers dominated measurements in some frequency ranges and locations. Also having 3-5m 360 degree access around the systems was not a reasonable expectation. In the end, we used best effort and engineering judgement to create a certification report that met, in our opinion, the intent of the law. Good luck- Hope your systems are installed someplace nice like, say, Hawaii. Sent from my mobile Please excuse brevity & grammar On Feb 21, 2019, at 12:48 PM, Jim Hulbert <[email protected]<mailto:[email protected]>> wrote: Equipment that is covered under FCC Rules Part 15, but which is too large to test on an open area test site, can alternatively been tested in situ. However, the rules state that the test should be performed at 3 different representative installations of the equipment. Does anyone on this forum have experience doing this? I would expect conducted emissions to be reasonably similar, but I can see how environmental influences could result in 3 different sets of radiated emissions data. How do you make sense of the data? Jim Hulbert This email message may contain confidential, proprietary and/or privileged information. It is intended only for the use of the intended recipient(s). If you have received it in error, please immediately advise the sender by reply email and then delete this message. No one other than the intended recipient may disclose, copy, distribute or use the information contained in this message. - ---------------------------------------------------------------- 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]>
