Jeffrey, You are correct. The standards do not address the usage of multiple antennas. We have not participated in any Round Robin testing multiple antennas in the test chamber, so I am not exactly sure what the possible effects would be in terms of getting accurate and/or repeatable results. >From my experience, I would guess that any object in an absorption chamber that does not absorb, will affect things like repeatability, and uncertainty in your measurements. It would be another question to ask just how much? and is it worth considering?
Best Regards, Scott Mee Johnson Controls Inc. Automotive Systems Group EMC Product Compliance 616.394.2565 scott....@jci.com |---------+---------------------------------> | | Jeff.Greilich@asl-tk.c| | | om | | | Sent by: | | | owner-emc-pstc@majordo| | | mo.ieee.org | | | | | | | | | 04/16/02 02:15 PM | | | Please respond to | | | Jeff.Greilich | | | | |---------+---------------------------------> >--------------------------------------------------------------------------------------------------------------------------| | | | To: emc-p...@ieee.org | | cc: | | Subject: Question concerning antenna carousels, their usefulness, credibility of data collected, and...... | >--------------------------------------------------------------------------------------------------------------------------| Et Al: I am soliciting opinions from anyone who has attempted using an antenna carousel that aids in doing automated EMI measurements under CISPR 25. The CISPR 25 specification provides requirements in terms of spacings of the antenna elements from the walls of the room, size of the room, use of anechoic material, etc but not pertaining to adjacent antennas. In addition, certain automotive companies place further requirements in terms of expected performance relative to Round Robin results of a Test Artifact taken at several labs before allowing a new lab to be listed as AEMCLRP accredited. I look forward to hearing from those involved in the Automotive Industry who have information either good/bad relating to this issue. Regards, Jeffrey W. Greilich ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"