Note that the allowance for shorter measurement distances in CISPR 22 is for small devices, too. And, as noted, is limited to Class B devices. Plus, some regulators do not allow this option to be used and insist on 10 meter data.
Ghery Pettit ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Rudd, Adam Sent: Wednesday, July 30, 2008 11:59 AM To: [email protected]; [email protected] Subject: RE: Class A antenna distance 47CFR 15.31(f)(1) allows measurements at distances other than specified and details the extrapolation factor. http://edocket.access.gpo.gov/cfr_2007/octqtr/47cfr15.31.htm EN 55022 Section 10.2.1 has a note that specifically makes an allowance for Class B devices to be measured at 3m. I tend to think the detail of Class B being included and Class A being omitted from the note has significance. Best Regards, Adam Rudd Engineer (EMC) NCR Corporation, RHSS Duluth, GA (770) 495-2825 ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, July 30, 2008 2:26 PM To: [email protected] Subject: (no subject) Dear members, I have a question on the use of a 3 meter fully anechoic chamber. Can this 3 meter chamber be used to qualify a product for FCC or CISPR class A, since the required test distance is 10 meter? Please provide any reference to paragraphs in the standards. Your responses are appreciated. Thanks, Timothy A. Pierce Tap Engineering, Inc. ________________________________ Get fantasy football with free live scoring. Sign up for FanHouse Fantasy Football today <http://www.fanhouse.com fantasyaffair?ncid=aolspr00050000000020> . - ---------------------------------------------------------------- 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 [email protected] 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] 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 [email protected] 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] 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 [email protected] 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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
