Peter: First, calling out Test Method CE03 implies that you are not being asked to apply the current version of Mil-Std-461 (the current version is "E", and that document has the old Mil-Std-462 merged into it; Mil-Std-462 no longer exists). The last version of 461/462 to use the older "CE03" method designation was Mil-Std-461C, which was superseded by Mil-Std-461D in January of 1993.
But, assuming you and your customer are really working to the 461C (and the roughly contemporary Mil-Std-462, Notice 3), then you seem to be addressing the old Narrowband / Broadband signal identification problem. The old 461/462 worked with the concept of two different emission limit levels; one for "narrowband" signals and another for "broadband" signals. You had to observe and test each signal, using three defined judgment criteria, and declare each emission either NB or BB, and then compare those emissions to the applicable limit figure. You can do the signal identification manually, or some acquisition software was able to do the task automatically. Without getting into a long discussion, let me simply say that a classic NB signal was something like a clock or local oscillator; most of it's energy was within a very "narrow" frequency range. A classic BB signal was the distribution of energy from a sharp pulse or step, such as motor brush arcing. Almost every signal you encounter is somewhere in between these extremes. Starting with 461D/462D, the NB/BB concept was abandoned. (Also, starting with the "D" revision, 461 and 462 revisions were issued at the same time. Prior to that, 461 and 462 were always a little unsynchronized. Now, there is only Mil-Std-461E. Regards, Ed Ed Price [email protected] Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA USA 858-505-2780 (Voice) 858-505-1583 (Fax) Military & Avionics EMC Services Is Our Specialty Shake-Bake-Shock - Metrology - Reliability Analysis >-----Original Message----- >From: Erauw, Peter [mailto:[email protected]] >Sent: Wednesday, January 09, 2002 3:57 AM >To: '[email protected]' >Subject: MIL-STD-462 paragraph 4.2.6. > > > >A customer is requesting us to judge CE03 measurement results >according to >MIL-STD-462 paragraph 4.2.6. >Does anyone have any experience with this ? >Thanks, >Peter Erauw >R&D manager mechanics >BarcoView - Avionics >BELGIUM >visit our website : http://www.barcoview.com ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [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: No longer online until our new server is brought online and the old messages are imported into the new server.
