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I think Ken has come up with the best explanation of what Method RE102 is trying to accomplish. At first glance, you might think that the wording is directing you to do the RE102 test, for any transmitter or receiver, in a standby mode. At second glance, you might think that the wording is exempting any emission that might be radiated into the test chamber by the EUT (by simply not fully operating the EUT). But, for an integrated antenna, Method RE103 would then become applicable, and the receiver and transmitter would be turned on to radiate any possible harmonic and spurious emissions during RE103. Thanks for your view on this! Ed >-----Original Message----- >From: Ken Javor [mailto:[email protected]] >Sent: Monday, July 12, 2004 8:28 AM >To: Price, Ed; '[email protected]' >Subject: Re: MIL-STD-461E Method RE102 Applicability > > >I think the operative phrase is "and antennas designed to be >permanently >mounted to the EUTs." If it is permanently mounted, you >cannot disconnect >it and connect a dummy load. If it is permanently mounted, you cannot >transmit during RE102 (unless you mounted it in the control, not test >chamber). > >> From: "Price, Ed" <[email protected]> >> Date: Mon, 12 Jul 2004 07:54:34 -0700 >> To: "'[email protected]'" <[email protected]> >> Subject: MIL-STD-461E Method RE102 Applicability >> >> -------------------------------------------------- >> >> And now for something completely different, a question on >the applicability >> of Method RE102. >> >> Paragraph 5.16.1, RE102 Applicability, reads: >> >> "This requirement is applicable for radiated emissions from >equipment and >> subsystem enclosures, all interconnecting cables, and >antennas designed to >> be permanently mounted to the EUTs (receivers and >transmitters in standby >> mode)." >> >> I normally test a transmitter by operating it, with >modulation, into a dummy >> load placed directly onto its RF output port. My rationale >is that the >> transmitter and modulator circuits will load the power >supply, and exercise >> data paths, that could well cause emissions at frequencies >far removed from >> the fundamental. >> >> So what is that parenthetical phrase trying to say? The more >I stare at it, >> the more I want to reach for an eraser. >> >> Regards, >> >> Ed >> >> >> Ed Price >> [email protected] WB6WSN >> NARTE Certified EMC Engineer & Technician >> Electromagnetic Compatibility Lab >> Cubic Defense Applications >> San Diego, CA USA >> 858-505-2780 (Voice) >> 858-505-1583 (Fax) >> Military & Avionics EMC Is Our Specialty This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. IEEE PSES Main Website: http://www.ieee-pses.org/ To post a message send your e-mail to [email protected] Instructions for use of the list server: 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: Ron Pickard: [email protected] Dave Heald: [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
