Ken, This is a good example. IN Europe this is not allowed by the rules. Any intentional radiator need to have license. Some can be general some are individual and it is not a matter of power. It is only the intentional part which is important.
Lothar Schmidt Technical Manager EMC, SAR, Antenna testing and BQB CETECOM Inc. 411 Dixon Landing Road Milpitas, CA 95035 Phone +1 408 586 6214 Fax +1 408 586 6299 This e-mail may contain proprietary, privileged and confidential information for the sole use of the named intended recipient. Any review or distribution of this e-mail by any party other than the intended recipient or that person's agent is strictly prohibited. If you are not the intended recipient, please delete all copies and immediately Contact the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. Thank you. From: [email protected] [mailto:[email protected]] On Behalf Of Ken Javor Sent: Tuesday, July 12, 2005 10:59 AM To: [email protected] Subject: Re: Radiated emission measurement below 30MHz You are vastly OVERESTIMATING the load at 10 pF. A 41" rod over a ground plane is a 10 pF load. I find this thread interesting. I can buy an audio input device transmitting in the FM band for the purpose of playing an audio device through my automobile stereo system. Clearly this device was designed to intentionally transmit in the FM band, and further it must transmit with the same modulation and at the same center frequencies as stipulated by law for the FM band. So it is not as simple as saying you can't transmit in a broadcast band. There is the issue of control. If I am using the above described device, I will choose an FM channel not currently being broadcast on, and the power level is low enough it only reaches a few feet. > From: "Robert A. Macy" <[email protected]> > Date: Tue, 12 Jul 2005 08:52:23 -0700 > To: John Woodgate <[email protected]> > Cc: [email protected] > Subject: Re: Radiated emission measurement below 30MHz > > It radiated an ELECTROSTATIC field. We're talking voltage > field of 100V at 150KHz. A little 1 inch wire poked out > with 100 V on it. Current was the load of the parasitic > capacitance around 10pF. You can't even see that 10 m away > > Yet, not allowed, go figure. > > - Robert - > > On Tue, 12 Jul 2005 05:33:29 +0100 > John Woodgate <[email protected]> wrote: >> Robert A. Macy <[email protected]> wrote (in >> <[email protected]>) about 'Radiated emission >> measurement below 30MHz', on Mon, 11 Jul 2005: >>> Is this allowed? >>> >>> It was my understanding that one of my clients tried to >> get a *very* low power intentianal "radiator" [at these >> frequencies, radiator is a euphemism] through Europe and >> due to some application there, couldn't even start >> although the power could not even be measured within 10 >> meters. >>> Seriously, there was NOTHING at 10 m. They saw >> "intentional radiator" >>> 150KHz, and said NO. >>> >>> Did we use the wrong people? >> >> It's difficult to tell. Was 150 kHz the actual operating >> frequency or did it just emit (marginally) at that >> frequency? 150 kHz is just above the lower end of the LF >> broadcast band (lower end 148.5 kHz) and it could be >> argued that no intentional radiator can be accepted whose >> operating frequency is in a broadcast band. >> -- >> Regards, John Woodgate, OOO - Own Opinions Only. >> Deadlines are 90% of deadliness. >> http://www.jmwa.demon.co.uk Also see >> http://www.isce.org.uk >> >> > ---------------------------------------------------------------- >> This message is from the IEEE Product Safety Engineering >> Society >> emc-pstc discussion list. Website: >> http://www.ieee-pses.org/ >> >> To post a message to the list, send your e-mail to >> [email protected] >> >> Instructions: >> > http://listserv.ieee.org/listserv/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: >> >> Richard Nute: [email protected] >> Jim Bacher: [email protected] >> >> All emc-pstc postings are archived and searchable on the >> web at: >> >> http://www.ieeecommunities.org/emc-pstc > > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > Instructions: http://listserv.ieee.org/listserv/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: > > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc > This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/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: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/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: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
