I have been reading through ANSI C95.1-2005 with an interest toward the limitation of RF induced currents, which leads me to Paragraph 4.2.
But here’s where I get confused, For instance, I have a 230 MHz intentional emitter that has a peak power of about 20 Watts, albeit with a fairly low duty cycle that yields a much lower average power. So, I drill into Paragraph 4.2 for BR.s & MPE’s in the frequency range of 100 kHz to 3 GHz. Going deeper, I find Paragraph 4.2.3 addressing contact & induced current limits for the frequency range of 100 kHz to 110 MHz. But, there is nothing similar for 110 MHz through 3 GHz. My question is, why is 110 MHz chosen as an arbitrary upper limit of regulation and guidance? Was 110 MHz chosen for some good physical reason, or is it possibly a limit based on the measurement technique? It just doesn’t make any sense that there would be no concern about emitters >110 MHz! As an aside, the text of Paragraph 4.2.3, and the associated Figures 1 & 2, give me a bad feeling because they seem to not agree on a value of 100 MHz or 110 MHz for that upper limit. Either 110 MHz should be 100 MHz, or the figures are drawn incorrectly. And 100 MHz is a much nicer big round number if you need some arbitrary stopping point. Am I missing something elsewhere in the ANSI spec, or will this 100/110 MHz bound soon be moved a lot higher? Thanks in advance for any comments! Ed Price [email protected] <blocked::mailto:[email protected]> WB6WSN NARTE Certified EMC Engineer Electromagnetic Compatibility Lab Cubic Defense Applications San Diego, CA USA 858-505-2780 Military & Avionics EMC Is Our Specialty - ---------------------------------------------------------------- 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://product-compliance.oc.ieee.org/ 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]>
