IEVref:726-07-16ID:
Language:enStatus: Standard
Term: screening attenuation
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Symbol: a s MathType@MTEF@5@5@+= feaahCart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqipG0dh9qqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9vqaqpepm 0xbba9pwe9Lq=Jirpepeea0=as0Fb9pgea0lXxe9vr0=vr0=vqpWqa aeaaciGaciGadaGabeaabaGaaqaaaOqaaabaaaaaaaaapeGaamyya8 aadaWgaaWcbaWdbiaadohaa8aabeaaaaa@35D2@
Definition: logarithmic ratio of the power P1 fed into the cable and the maximum value of radiated power Pr,max

a s   =  −10⋅lg Env   P r,max P 1     MathType@MTEF@5@5@+= feaahCart1ev3aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqipG0dh9qqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9vqaqpepm 0xbba9pwe9Lq=Jirpepeea0=as0Fb9pgea0lXxe9vr0=vr0=vqpWqa aeaaciGaciGadaGabeaabaGaaqaaaOqaaabaaaaaaaaapeGaamyya8 aadaWgaaWcbaWdbiaadohacaaMc8UaaGPaVdWdaeqaaOWdbiabg2da 9iaaykW7caaMc8UaeyOeI0IaaGymaiaaicdacqGHflY1ciGGSbGaai 4zamaabmaapaqaa8qacaqGfbGaaeOBaiaabAhadaabdaWdaeaapeGa aGPaVpaalaaapaqaa8qacaWGqbWdamaaBaaaleaapeGaaeOCaiaabY cacaqGTbGaaeyyaiaabIhaa8aabeaaaOqaa8qacaWGqbWdamaaBaaa leaapeGaaeymaaWdaeqaaaaak8qacaaMc8oacaGLhWUaayjcSdGaaG PaVdGaayjkaiaawMcaaaaa@57CB@

Note 1 to entry: Env in the formula means "envelope"


Publication date:2025-03
Source IEC 62153-4-4:2015, 3.3, modified – Definition modified to comform to the latest version of the ISO/IEC Directives
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