The words "such as" in paragraph 3 of claus D.1 would indicate that biconical and log-periodic dipole array antennas are examples of broadband antennas, not an exhaustive list. Poorly worded if the intent was to specify the acceptable types of broadband antennas and to exclude any types.
Jim Hulbert From: [email protected] [mailto:[email protected]] On Behalf Of Bill Stumpf Sent: Friday, January 13, 2012 11:45 AM To: Kunde, Brian; [email protected] Subject: RE: [PSES] Biconilog antennas and ANSI C63.4:2009 Brian, Unfortunately not all hybrid antennas are equal, and studies done in the past and more recently have indicated rather large uncertainties in measurement when using some of these antennas. ANSI C63.4:2009 does not currently include the hybrid designs in the list of acceptable antennas for NSA or final measurements. The ANSI-ASC C63® interpretation might be helpful: http://www.c63.org/documents/misc/interpretations/C63.5_Explanation_Hybrid_NSA_hybrid_Apr2011.pdf Regards, Bill From: Kunde, Brian [mailto:[email protected]] Sent: Friday, January 13, 2012 10:02 AM To: [email protected] Subject: Re: [PSES] Biconilog antennas and ANSI C63.4:2009 This really begs the question, "Why?". Bicon-log antennas have been out for more than 20 years, have been and are currently being used by many labs for many years, are calibrated under the same test conditions that Bicon and Log antennas are, so what's the deal? Is there some major problem with them? Or is this just another move on the accreditation authorities to have every lab do exactly the same thing? When you say "not accepted for measurements in ANSI C63.4:2009", is the for emissions testing or only in regards to NSA? The Other Brian From: [email protected] [mailto:[email protected]] On Behalf Of Martin E. Cormier Sent: Friday, January 13, 2012 9:40 AM To: [email protected] Subject: Re: [PSES] Biconilog antennas and ANSI C63.4:2009 Thanks for this unequivocally clear answer. We'll take appropriate measures while it is still time. I can't help but hope that the committee starts accepting these "new" antennas in the near future. Martin On 2012-01-13 9:15 AM, Bill Stumpf wrote: Martin, There's a lot of study going on currently regarding the hybrid antenna designs, but currently the hybrid (bicon-log) antennas are not accepted for measurements in ANSI C63.4:2009. Bill Stumpf - Member ASC C63tm committee D.L.S. Electronic Systems, Inc. 166 South Carter Street Genoa City WI 53128 Ph: 262-279-0210 Email: [email protected]<mailto:[email protected]> -----Original Message----- From: Martin E. Cormier [mailto:[email protected]] Sent: Friday, January 13, 2012 7:14 AM To: [email protected]<mailto:[email protected]> Subject: [PSES] Biconilog antennas and ANSI C63.4:2009 Hello everyone, I am relatively new to this mailing list, so this question may have been posted before. I did not find it when searching the archive. It has come to my attention yesterday that some accreditors may give a lab a hard time if it tries to get ANSI C63.4:2009 accreditation when using biconilog broadband antennas for measurements from 30MHz to 1GHz. Table 1 does not explicitely list combination antennas as allowed, but both biconicals and bilogs are listed as OK for this frequency range. Has anyone here been subjected to accreditation issues for using biconilogs? Thanks, Martin (Sorry if my English is bad, second language for me) - ---------------------------------------------------------------- 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]><mailto:[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. 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]><mailto:[email protected]> Mike Cantwell <[email protected]><mailto:[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]><mailto:[email protected]> David Heald: <[email protected]><mailto:[email protected]> -- ___________________________________________________________________________ Martin E. Cormier, ing. 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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.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. 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]>
