> Did anyone say good craftsmanship ? I can't say I've ever heard that word in the context of PLT. (;-) ================== I've only heard it used by the guys hammering together the chambers and trying to get the seams to seal.
- Bill In the event of a national emergency, click on the following links to provide directions to your duly elected mis-representative. http://www.usa.gov/Contact/Elected.shtml or... https://writerep.house.gov/writerep/welcome.shtml http://www.senate.gov/general/contact_information/senators_cfm.cfm ________________________________ From: John Woodgate <[email protected]> To: [email protected] Sent: Tue, May 25, 2010 3:46:30 PM Subject: Re: PLT is a Radio system. was: CE Standard for Power Lines data Transmission System In message <[email protected]>, dated Tue, 25 May 2010, "ce-test, qualified testing bv - Gert Gremmen" <[email protected]> writes: > I think we can agree also that any communication system that uses the ether should be classified as an intentional radiator (see ITU). If this usage of the ether is unintentional (=actual) due to an intentional choice of an unsuitable interconnection medium (mains power wiring), one may doubt to the level of unintentionally - ism. I wanted to introduce another term, so as to avoid an argument about what is intentional or not. > > I think we can also agree that the mains wiring is not a suitable medium for transmission of HF and RF signals. It's OK for AM radio in the LF band, used in Switzerland. > And the high level of transmission required and requested (and reason for the interference) by the PLT industry is partly because the transmission medium is so unsuitable for this purpose. If they didn't insist on such a high data rate, the problem would be lessened, because the sending power could be reduced. For the vast majority of PLT applications, a high data rate is not necessary. It's just the marketing people insisting on being able to claim 200 bigabits per jilisecond. This is made worse by the consumer interest people firing up unrest over broadband data rates. Most people simply don't need the maximum capacity their service can offer under best conditions. > > Did anyone say good craftsmanship ? I can't say I've ever heard that word in the context of PLT. (;-) -- 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]> - 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]>
