OET-65's various parts contain everything needed to determine allowable FS including frequency, modulation and duty cycle effects. And although it is an FCC regulation, TWO levels are permitted: One is for public exposure -- where people may not know they are in the field and can move out of it -- and another, higher one, for employees and other persons in an area perhaps closer to antennas who DO know and CAN leave before their exposure has passed what's (watts, get it?) the safe limit set by the FCC.
To quote the old Prego Spaghetti sauce commercial: "It's IN there!" RF Safety is covered to some degree in all US Amateur Radio license exams. There is also an informative exposition in somewhat more user-friendly form at the US Department of Labor Site at http://www.osha.gov/SLTC/radiofrequencyradiation/exposure.html Cortland KA5S > [Original Message] > From: Sundstrom, Michael <[email protected]> > To: [email protected] <[email protected]>; [email protected] <[email protected]> > Date: 8/11/2010 10:38:27 AM > Subject: RE: [PSES] RI query > > I have been told there is no hard and fast rule for the exposure level (power) as it is frequency dependent. > > I do know that free space (50 feet away) at 30MHz is around 55 watts with approximately a 3 dB gain antenna ( not in the main lobe of this antenna). Your location may be different, and this is NOT in a Anechoic or shielded room. > > KB5UKT > Michael Sundstrom > OHD / TREQ Dallas > Electronic Lab Analist, EMC Lead > 2170 French Settelment Rd, Suite B > Dallas, Texas 75212 > (214) 579 6312 > (940) 390 3644c - 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]>
