Hi Mario This has been a very long standing position from the FCC. It goes way back to the 80’s when I first started dealing with the FCC. This very old policy has been reiterated in the Knowledge Data Base (KDB). For example when specifically asked the FCC responded in KDB460108 which states “Question: May a monopole (rod) antenna be used for making radiated emission measurements below 30 MHz?
Answer: The procedures for measuring intentional and unintentional radiators is contained in Section 15.31(a)(3), which incorporates into the Rules by reference ANSI Standard C63.4–2003: “Methods of Measurement of Radio-Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz”. Excluded, however, are Sections 4.1.5.2, 5.7, 9 and 14 of ANSI C63.4-2003, which, among other things, excludes the use of the rod antenna. For radiated emission measurements below 30 MHz, the FCC requires the use of a loop antenna.” As to the rules and measurement procedures; what you need to remember is that the rules are not really test methods and so you would not necessarily find this in the rules themselves, but in the established and/or approved test procedures accepted by the FCC. Also, the FCC has accepted some industry standardized test methods as well as producing several FCC documents and procedures. For the industry standards they are purchased from the standards organization and will not be found as downloadable from any FCC site. Here is a short list: 1 ANSI C63.4 2003 (with exclusions from FCC where appropriate) – covers many low power devices other that 15.247, 15.407 etc. Purchased >from ANSI or other publishing firms such as Global etc 2 DA00705 - this is a docket from the FCC itself and can be downloaded from OET. This deals with FHSS devices under 15.247 3 Guidance on Measurements for Digital Transmission Systems Section 15.247 – issued in 2002 downloadable from OET. This deals with DTS systems and UNII systems under 15.247 and 15.407 etc. 4 TIA603C – this is the generic test procedure for all licensed rule parts (i.e. other than parts 15 and 18). Purchased from TIA or other orgs such as Global etc. 5 MP-5 – this is part 18 methods and is downloadable from OET. You should also consult the FCC Knowledge Data Base for specific methods acceptable by FCC as well. Thanks Dennis Ward Director of Engineering American TCB Certification Resource for the Wireless Industry www.atcb.com 703-847-4700 fax 703-847-6888 direct - 703-880-4841 From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of mlehm...@herberg-sp.de Sent: Tuesday, October 21, 2008 1:12 AM To: emc-p...@ieee.org Cc: Grace Lin Subject: rod antenna measurement not allowed below 30 MHz for FCC Dear Members, I´ve heard that FCC will not accept rod antenna measurements below 30 MHz. This was´nt puplished anywhere in the rules. May I ask you to help finding a source on the FCC web site to get such important informations in the future? Kind regards Mario Lehmann Geschäftsbereich European Compliance Laboratory (ECL) __________________________________________________ HERBERG. Service Plus GmbH Tel: +49 911 59835-923 Nordostpark 51 Fax: +49 911 59835-90 90411 Nürnberg mailto: mlehm...@herberg-sp.de <mailto:mlehm...@herberg-sp.de> http://www.herberg-sp.de <http://www.herberg-sp.de/> Amtsgericht Nürnberg Geschäftsführer HRB 19587 Peter Birkmann - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.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 emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.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 emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
