Transcription of EMC Related Formulae
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Example: air traffic controller
EMC Related Formulae
Robert RichardsPage 103/30/03 EMC Related FormulaeLog Linear VoltagedB V to Volts()()20/12010 =VdBV Volts to dB V()120log20+=VVdB dBV to Volts()20/10dBVV=Volts to dBV()VdBVlog20=dBV to dB V120+=dBVVdB dB V to dBV120 =VdBdBV Log Linear PowerdBm to Watts()()10/3010 =dBmWWatts to dBm30)log(10+=WdBmdBW to Watts()10/10dBWW=Watts to dBW)log(10 WdBw=dBW to dBm30+=dBWdBmdBm to dBW30 =dBmdBWLog Linear CurrentdBuA to uA()20/10 AdBA =uA to dBuA)log(20 AAdB =dBA to A()20/10dBAA=A to dBA)log(20 AdBA=dBuA to dBA120 =AdBdBA dBA to dBuA120+=dBAAdB Log Linear ImpedancedB(ohms) to ohms()20/)(10ohmsdBZ=ohms to dB(ohms)()ZohmsdBlog20)(=Term ConversiondBm to dBuVdBmZvdB++=)log(1090 dBuV to dBm)log(1090 ZVdBdBm = dBuA to dBm90)log(10 +=ZAdBdBm dBm to dBuA90)log(10+ =ZdBmAdB dBuA to dBuV)log(20 ZAdBVdB+= dBuV to dBuA)log(20 ZVdBAdB = Volts to Amps & WattsZVA=ZVW2=Amps to Volts & WattsZAV*=ZAW*2=Watts to Volts & AmpsZWV*=ZWA=RF Related , Field Strength & Power DensitydBuV/m to V/m)20/)120)/(((10/ =mVdBmV
Robert Richards Page 3 03/30/03 VSWR/reflection coefficient/return loss VSWR given Fwd/Rev Power fwd rev fwd rev P P P P VSWR − + = 1 …
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