Posted for: mmur...@alesis1.corpusa.com
:-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-) Ed Price ed.pr...@cubic.com Electromagnetic Compatibility Lab Cubic Defense Systems San Diego, CA. USA 619-505-2780 (Voice) 619-505-1502 (Fax) Military & Avionics EMC Services Is Our Specialty Shake-Bake-Shock - Metrology - Reliability Analysis :-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-):-) > -----Original Message----- > From: Mike Murphy [SMTP:mmur...@alesis1.corpusa.com] > Sent: Tuesday, November 16, 1999 6:59 AM > To: emc-p...@majordomo.ieee.org > Subject: EN61000-4-6 versus EN55103-2 > > Folks, > I could really use some wisdom from the group on this one. I have audio > equipment that needs to pass this new set of immunity tests...well, > they're > new to me. The EN61000-4-6 "Immunity to conducted disturbances, induced by > > RF fields" is called out in the product family standard EN55103-2. > > I'm struggling to understand why the interference signal level is so high. > > As I read both standards, I believe the creators of the product standard > have either misinterpreted the test level guidelines or have just created > an unreasonable situation. > > Here are some background details: > EN61000-4-6 Scope: gives the product committee (in this case EN55103) the > responsibility for the appropriate choice of the test and the severity > level to be applied to the equipment. > > EN61000-4-6 Annex C "Guide for selecting test levels" > Class 2 = 3V signal: Moderate electromagnetic radiation environment. > Low-power portable transceivers (typically less than 1 W rating) are in > use, but with restrictions on use in close proximity to the equipment. A > typical commercial environment. > > EN55103-3-2 has set the test level at 3V for the environments: > residential, > commercial and light industrial as well as urban outdoors with the test > unit expected to meet performance criteria A. > > So, it looks like the standards people are telling me that in a normal > commercial environment, I've got to be immune to the possibility of a full > > 3V interference signal on my cables?!?! From what?!?! > > Does anyone else interpret this as unreasonable? > > Any constructive thoughts on what reasonable options are available to me > is > most appreciated. > > Thanks ahead of time, > Mike Murphy > Alesis Studio Electronics > Santa Monica, CA USA --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
