Engineers/poets ?!?! And with a sense of humor, too! What is this world coming to???? However, I'll drink to that when I get home tonight! Tania Grant, Octel Communications Corporation
______________________________ Reply Separator _________________________________ Subject: Verses: EMI, RFI Author: cortland.richmond...@ccmailsmtp.ast.com at P_Internet_mail List-Post: emc-pstc@listserv.ieee.org Date: 8/23/96 4:02 PM The question duly asked, What meaning's then attached When one says RFI's on hand, Another's EMI is banned? And why two experts, old and wise, Cannot their terms in one comprise This thing on which they both must toil; Does one say "dirt", the other "soil"? Now then, the matter's at a boil And since the fight's about to be A tussle wondrous that we'll see, Lets muddy more the waters free And ask, why call it "EMC"? He paused but once to laugh most ill, And, having worked his evil will, Turned quick away from on our sill To some dank fen or misty hill; He fled. And that's the story still! Cortland Richmond ______________________________ Reply Separator _________________________________ Subject: Re: EMI verses RFI Author: "Chris Dupres" <cdup...@vacgen.fisons.co.uk> at internet List-Post: emc-pstc@listserv.ieee.org Date: 8/23/96 1:53 Hi Kathy You wrote: > > I am a safety person who needs to answer a question > from one of our sales people on the question of > "EMC" verses "RFI". > > Is there anyone out there who can explanation the > differences between "EMC" and "RFI" and how they > relate to each other. > Essentially : EMC is Electromagnetic Compatibility, the ability of equipment to neither produce interference, nor be affected by interference from others. RFI is Radio Frequency Interference, which strictly means undesirable intrusive Radio Frequency activity. (I believe RF is 100kHz to 30MHz). i.e. the stuff that EMC tries to ignore! Nowadays the more common and more useful term for such interference is EMI (Electromagnetic Interference) which is the same thing but with no implied frequency range (d.c. to Light) For interest, and to see if I can remember: AF = 0 - 30kHz LF = 30 kHz - 100kHz RF = 100kHz - 30MHz HF = 30MHz - 100MHz VHF = 100MHz - 700MHz EHF etc. etc. I'm probably wrong, usually am. Chris Dupres EMC Specialist. VG Microtech. cdup...@vacgen.fisons.co.uk tel +44 (0) 1825 761077 fax +44 (0) 1825 768343 'Opinions expressed are personal, not necessarily Corporate'