We have some questions concerning radiated emissions testing requirements above 1GHz for IT equipment. The basic question is whether a single test setup can be sufficient for both FCC and CISPR when testing for emissions at frequencies above 1 GHz.
The FCC uses ANSI C63.4 to define the test setup (specifically, the test site). C63.4 currently says that a site acceptable for testing up to 1 GHz can be used for testing above 1 GHz, but also states that "additional site validation requirements above 1GHz are under study". The CISPR 22/CISPR 16-1-4 test method coming into effect next year provides requirements for the test site (absorber at the OATS, etc.) and has an upper frequency of 6 GHz. The FCC requires testing up to the 5th harmonic or 40GHz, whichever is lower. There are also some differences in the limits above 1 GHz. Does this mean that when we test above 1 GHz, we must perform two separate tests, one to the FCC requirements, and one to CISPR22/CISPR16-1-4? Does the FCC envision acceptance of CISPR22 test results for testing above 1GHz as they currently do for <1GHz (and more importantly, using the CISPR22/16-1-4 setup)? John D. Flavin Teradata TCP Engineering 17095 Via del Campo San Diego, CA 92127 john.fla...@teradata.com V: (858) 485-3874 F: (213) 337-5432 - 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 <emc-p...@ieee.org> 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 <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>
