Group, On several occasions during radiated immunity EMC testing, I have observed products deviate or even fail and subsequent manual spot checks at the frequencies of interest have revealed no anomalous behaviour. I saw such behaviour on a product I was testing recently, and spent a long time conducting spot checks at the frequency and the immediate neighbourhood without much success replicating the failure. I tried turning the modulation on and off and even applying the modulated field instantly on and off without much success. I did a sweep again and the deviation was back like clockwork! What is the explanation for this and there are techniques for getting round this 'problem'? Rgds - Chris ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/
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