Dear Ken I have no problem with "The unalterable physics of field-to-wire coupling". But I am concerned to ensure that basic physics is correctly applied in engineering issues.
Can I please ask you to place any criticisms of me in the threads I am contributing to, or send them directly to me, not hide them away where I might not see them. (I hope to be able to get around to reading the week's contributions on the EMC and safety threads this weekend.) Regards, Keith Armstrong In a message dated 09/01/02 21:49:17 GMT Standard Time, [email protected] writes: > Subj:FW: ISO 11452-4 Bulk Current Injection Test Requirements > Date:09/01/02 21:49:17 GMT Standard Time > From: [email protected] (Ken Javor) > Sender: [email protected] > Reply-to: <A > HREF="mailto:[email protected]";>[email protected]</A> > (Ken Javor) > To: [email protected], [email protected] > > Scott and other EMC engineers, > > I looked up the referenced spec and saw it was an AUTOMOTIVE spec. And the > injection level is near CONSTANT from 1 - 400 MHz, with an injection level > as high as 1 Amp at the low end (1 - 30 MHz). Keith Armstrong, pay heed. > The unalterable physics of field-to-wire coupling predict that this limit > implies a field intensity of at least 700 V/m up to 30 MHz and at least 150 > V/m and the vehicle is over 100 m long. If there are any design impacts to > meeting this requirement (and I am sure there are when every penny counts) > this spec is massive overkill and needs to be completely revised. > > Ken Javor >
