In message <4c5e6457cd7911469a07260381288c286f892...@orsmsx502.amr.corp.intel.com>, dated Mon, 24 May 2010, "Pettit, Ghery" <[email protected]> writes:
> >So why not protect the other licensed users of the HF spectrum? If you >look at the FCC Rules, Part 15, Subpart G provides regulations for >Access BPL systems. These cover much wider areas with long overhead >power lines as the path. They have a higher potential for radiating >significant levels of RF energy. The FCC Rules provide a list of >prohibited frequencies for these systems and a long list of "exclusion >zones" where they may not be installed. The prohibited frequencies are >designed to protect aeronautical HF radio installations (ground and >airborne) from interference. The exclusion zones protect a number of >users (government) of the spectrum by keeping installations a minimum >distance from the communications facilities. Clearly the FCC is >concerned about the interference potential for these systems as it >provides protection for certain uses of the spectrum in its Rules. This is all very well for the country in which Access PLT is used, but the PLT emissions from power lines can reach the ionosphere and spread far and wide. The EMC situation with Access PLT is a truly global problem. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK I should be disillusioned, but it's not worth the effort. - 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]> 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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
