The original 450 kHz lower limit bracketed the low end of commercial AM broadcast transmissions in the USA (530 kHz). In Europe, there is AM broadcasting between 150 kHz and about 300 kHz. I believe this is designated LW (long wave) as opposed to the usual American AM band which is MW (medium wave) and the HF bands which are called short wave.
---------- >From: Jim Eichner <[email protected]> >To: "'EMC-PSTC - forum'" <[email protected]> >Subject: RE: Changes to FCC Conducted Limits for Part 15 & 18 >Date: Wed, Jul 24, 2002, 4:12 PM > > > A philosophical .vs practical question: Why is the FCC doing this? Is it > harmonization for the sake of harmonization, or are there real-life issues > driving it? If it's the latter, what sorts of products have susceptibility > issues between 150kHz and 450kHz? > > Thanks, > > Jim Eichner, P.Eng. > Manager, Engineering Services > Xantrex Technology Inc. > Mobile Power > web: www.xantrex.com <http://www.xantrex.com> > > Any opinions expressed are those of my invisible friend, who really exists > but only in the far field. > > > Confidentiality Notice: This email message, including any attachments, > is for the sole use of the intended recipient(s) and may contain > confidential and privileged information. Any unauthorized review, use, > disclosure or distribution is prohibited. If you are not the intended > recipient, please contact the sender by reply e-mail and destroy all > copies of the original message. > > > > -----Original Message----- > From: Price, Ed [mailto:[email protected]] > Sent: Wednesday, July 24, 2002 10:28 AM > To: 'John Barnes'; [email protected] > Subject: RE: Changes to FCC Conducted Limits for Part 15 & 18 > > > > Also notice, in the same directory, a newer version from July 7, 2002, at: > > http://www.fcc.gov/oet/info/rules/part15/part15_7_22_02.pdf > > > > Ed Price > [email protected] > Electromagnetic Compatibility Lab > Cubic Defense Systems > San Diego, CA USA > 858-505-2780 (Voice) > 858-505-1583 (Fax) > Military & Avionics EMC Is Our Specialty > Shake-Bake-Shock - Metrology - Reliability Analysis > > >>-----Original Message----- >>From: John Barnes [mailto:[email protected]] >>Sent: Wednesday, July 24, 2002 8:15 AM >>To: [email protected] >>Subject: Changes to FCC Conducted Limits for Part 15 & 18 >> >> >> >>EMC-PSTC'ers, >>There has been talk for several months about the FCC changing the >>conducted emission limits for Part 15 and Part 18 devices. Well, it is >>official. FCC docket 98-80 was published in the Federal Register on >>July 10, 2002- volume 67, number 132, pages 45666-45671, see (all one >>URL): >> http://frwebgate1.access.gpo.gov/ >> cgi-bin/waisgate.cgi?WAISdocID=38880224794+0+0+0&WAISaction=retrieve >> >>FCC Part 15, incorporating the new Section 15.107, may be downloaded >>from >> http://www.fcc.gov/oet/info/rules/part15/part15_5_30_02.pdf >> >>This will not be printed in the Code of Federal Regulations (CFR), >>downloadable from the National Archives and Records Administration >>(NARA) at: >> http://www.access.gpo.gov/nara/cfr/cfr-table-search.html >>until spring 2003. >> >>This change probably will not affect products that have been >>marketed in >>Taiwan and Japan, because they have already had to meet the >>CISPR limits >>for those markets. But products that are sold only in the >>US/Canada may >>be affected, because conducted emissions are now to be tested >>clear down >>to 150kHz, versus the former 450kHz lower limit. >> >>The new conducted emission limits are: >>* Mains port on Class B devices: >> - 66dB(uV) quasi-peak and 56dB(uV) average at 0.15MHz, to >> 56dB(uV) quasi-peak and 46dB(uV) average at 0.50MHz, decreasing >> linearly with the logarithm of the frequency. >> - 56dB(uV) quasi-peak and 46dB(uV) average from 0.50MHz to 5MHz. >> - 60dB(uV) quasi-peak and 50dB(uV) average from 5MHz to 30MHz. >>* Mains port on Class A devices: >> - 79dB(uV) quasi-peak and 66dB(uV) average from 0.15MHz to 0.50MHz. >> - 73dB(uV) quasi-peak and 60dB(uV) average from 0.50MHz to 30MHz. >> >>Paragraph 15 of FCC Docket 98-80, Transition Provisions, says that FCC >>part 15/18 products may be authorized using the old or the new FCC >>limits for two years (until July 10, 2004). After July 10, 2004, FCC >>part 15/18 products must be authorized using the new FCC limits. >>Furthermore, the new limits will apply to all FCC part 15/18 products >>that are manufactured or imported after three years (after July 10, >>2005). >> >>So for the next two or three years you have a third option for meeting >>FCC Part 15/18 requirements: >>1. Meet the old FCC conducted-emission and radiated-emission limits. >>2. Meet CISPR conducted-emission and radiated-emission limits. >>3. Meet CISPR conducted-emission limits and the old FCC radiated- >> emission limits. >> John Barnes >> dBi Corporation >> http://www.dbicorporation.com/ >> > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
