Hello Richard,
See FCC Part 15.33(b)(1). The highest frequency generated or used in the device determines the upper level of measurement. For a 180 MHz clock, you need to test up to 2 GHz. FCC Part 15.33(b)(1) basically corresponds to CISPR 22 section 6.2. The only difference is that the FCC allows different considerations if the highest frequency or clock used is below 1.705 MHz. Ted Eckert Compliance Engineer One Microsoft Way Redmond WA, 98052 (425) 707-9205 [email protected] This email message may contain confidential and proprietary information. Any unauthorized use is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message. From: Gartman, Richard [mailto:[email protected]] Sent: Wednesday, April 29, 2009 2:37 PM To: [email protected] Subject: Question regarding 47CFR FCC part 15: 2002 We have a class B unintentional radiator with a 180 MHz clock in it. Should I be concerned with radiated emissions above 1 GHz? What sections of FCC regulations apply? What is the acceptance criteria? Any guidance on this is greatly appreciated. Thanks W. Richard Gartman, MS, CSP Product Stewardship Manager Texas Instruments, Education Technology 7800 Banner Drive, Dallas, Tx 75251 Office: 972-917-1636 Email: [email protected] Fax: 972-917-0668 URL: www.education.ti.com www.education.ti.com/us/productstewardship P Please consider the environment before printing this email. There is only one earth - don't waste it. - 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. 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]> - 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.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. 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]>
