[PSES] Table III Susceptibility Scanning; MIL STD 461 E vs F
Historical Question, Will someone please give a little of the rationale for the changes in rev E vs F of Table III, Susceptibility Scanning. Thanks Chad Ofc: 858.762.6853 | Cel: 858.527.8149 - 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 All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas Mike Cantwell For policy questions, send mail to: Jim Bacher: David Heald:
[PSES] MIL STD 461F RE103 Appendix A.5.18.3
The RE103 discussion under Test Procedures in Appendix A.5.18 (5.18), MIL-STD 461F, is somewhat puzzling to me. It states: "Test procedures: Since the test procedure measures emissions radiating from an antenna connected to a controlled impedance, shielded, transmission line, the measurement results should be largely independent of the test setup configuration. Therefore, it is not necessary to maintain the basic test setup described in the main body of this standard." Except for the receive antenna, the statement is quite similar to the corresponding statement in A.5.6 (5.6) CE106: "Test procedures: Since the test procedures measure emissions present on a controlled impedance, shielded, transmission line, the measurement results should be largely independent of the test setup configuration. Therefore, it is not necessary to maintain the basic test setup described in the main body of this standard." It is logical to reason that there is no need to "maintain the basic test setup" when conducting CE106. There are no antenna's in the setup. Therefore chamber reflections are not an issue, so we expect the results to be independent from that standpoint. So I am apparently missing something.How could RE103 emissions measured in either a anechoic chamber or OATS be independent of the test setup configuration? What is really meant by "the basic test setup described in the main body of this standard."? And yes, I've checked 461E, which reads essentially the same. Charles D. (Chad) Airy General Atomics Reconnaissance Systems Group 16868 Via Del Campo Court | San Diego, CA 92127 wk: 858.762.6853 | fax: 858.762.5081 - Charles D. (Chad) Airy General Atomics Reconnaissance Systems Group 16868 Via Del Campo Court | San Diego, CA 92127 wk: 858.762.6853 | fax: 858.762.5081 - 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 All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. 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 Mike Cantwell For policy questions, send mail to: Jim Bacher: David Heald:
[PSES] MIL STD 461F RE103 Appendix A.5.18.3
The RE103 discussion under Test Procedures in Appendix A.5.18 (5.18), MIL-STD 461F, is somewhat puzzling to me. It states: "Test procedures: Since the test procedure measures emissions radiating from an antenna connected to a controlled impedance, shielded, transmission line, the measurement results should be largely independent of the test setup configuration. Therefore, it is not necessary to maintain the basic test setup described in the main body of this standard." Except for the receive antenna, the statement is quite similar to the corresponding statement in A.5.6 (5.6) CE106: "Test procedures: Since the test procedures measure emissions present on a controlled impedance, shielded, transmission line, the measurement results should be largely independent of the test setup configuration. Therefore, it is not necessary to maintain the basic test setup described in the main body of this standard." It is logical to reason that there is no need to "maintain the basic test setup" when conducting CE106. There are no antenna's in the setup. Therefore chamber reflections are not an issue, so we expect the results to be independent from that standpoint. So I am apparently missing something.How could RE103 emissions measured in either a anechoic chamber or OATS be independent of the test setup configuration? What is really meant by "the basic test setup described in the main body of this standard."? And yes, I've checked 461E, which reads essentially the same. Charles D. (Chad) Airy General Atomics Reconnaissance Systems Group 16868 Via Del Campo Court | San Diego, CA 92127 wk: 858.762.6853 | fax: 858.762.5081 - 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 All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. 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 Mike Cantwell For policy questions, send mail to: Jim Bacher: David Heald:
[PSES] MIL STD 461E NECESSARY BANDWIDTH
Greetings, Greetings to all, this is my first post to the list. My question deals with the Applicability paragraph of CE106. How does one apply the +/-5% non-applicability rule when the necessary bandwidth exceeds 10% of the fundamental frequency by a fair margin? Quoting the standard: "The transmit mode portion of this requirement is not applicable within the EUT necessary bandwidth and within ±5 percent of the fundamental frequency." The case I am referring to is real. However, to prevent exposure of proprietary information, I will use a hypothetical example: An airborne synthetic aperture radar having a fixed nominal chirp bandwidth of 1500 MHz at a center frequency of 15 GHz, illuminates a designated area on the ground. The radar fly's by the area, capturing multiple images, each from different depression and squint angles. During the transit of the imaging path, the radar center frequency and chirp bandwidth are gradually shifted for the purpose of improving the image quality. The resulting envelope of occupied (chirp BW + center freq shift) is 2000 MHz. Chad Airy SM, IEEE EMC SOCIETY Senior RF Engineer EMC Lab Manager General Atomics - RSG OFC. 858.762.6853 - 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 All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. 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 Mike Cantwell For policy questions, send mail to: Jim Bacher: David Heald:
