I read in !emc-pstc that Mike Hopkins <[email protected]> wrote (in <49CD487E8BA9D31181190060081C6B8FA26CA7@COMSERVER>) about 'RADIATED IMMUNITY REQUIREMENTS FOR EN61326' on Mon, 3 Mar 2003:
>The only thing I can think of is that maybe it isn't expected that one would >be close enough to a broadcast antenna at these frequencies for it to be an >issue (antennas are mounted atop very tall buildings and towers) Precisely, and measures ARE taken to control the emissions at large angles below the horizontal. The result may be quite low field strengths within the optical shadow of the antenna support - called 'umbrella effect'. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
