Ken
Don't look at 15.109 at all for intentional transmitters UHF/VHF radios are typically part 90, so nothing to do with any section of part 15, unless you are mains powered, when you need to do 15.207. 15.209 limits for devices covered by other parts of 15, such as 902-928 MHz devices covered under 15.245, 15.247 or 15.249, are only applied as specified in that part. And the requirement will vary depending on type of device and tx power and bandwidth. · 15.245 and 15.249 require ...Emissions radiated outside of the specified frequency bands, except for harmonics, shall be attenuated by at least 50 dB below the level of the fundamental or to the general radiated emission limits in § 15.209, whichever is the lesser attenuation. · 15.247 is for higher power, wideband devices, and only required 15.209 in restricted bands as defined in 15.205, not across the band: o Attenuation below the general limits specified in § 15.209(a) is not required. In addition, radiated emissions which fall in the restricted bands, as defined in § 15.205(a), must also comply with the radiated emission limits specified in § 15.209(a) (see § 15.205(c)). Regards Charlie -----Original Message----- From: Ken Javor [mailto:[email protected]] Sent: 02 April 2013 03:43 To: [email protected] Subject: [PSES] Control over handheld radio and similar low-power transmitter harmonic and spurious power output, USA All, Several people provided helpful pointers to various sections of the CFR with regards to the subject, but I am confused reading sections 47 CFR Parts 15.109 and 15.209. What I am looking for is a control on harmonics and spurious emissions from handheld transmitting devices, which can include RFID, and transmitters in the unlicensed 900 MHz range, and Wi-Fi, but also handheld radios operating at vhf and uhf, such as around 150 MHz and 400 MHz. What I am seeing in the above named sections are what appear to be limits on field intensity in the uV/m to mV/m range with no differentiation between fundamental and harmonics and spurs, and while these might make sense for unlicensed bands, it doesn't make sense (to me at least) for a handheld radio that can transmit up to 5 Watts. Can someone please clue me in? Thank you, Ken Javor Phone: (256) 650-5261 - ---------------------------------------------------------------- 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://listserv.ieee.org/request/user-guide.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://listserv.ieee.org/request/user-guide.html 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]>
