电学计算器 app for iPhone and iPad

Welcome!

V vs. W/dBm:
Vp = V * CF, (CF = Crest Factor)
Vp-p = V * CF * 2
dB = 20 * log10(V/V(ref)), (V(ref) = Reference Voltage)
W = V * V / Ω (Ω = load)
dBm = 10 * log10(W/1000)
dBW = 10 * log10(W)
A = V / Ω
Input any one of them, get all other values.

Error(%) -> Error(dB):
Voltage: EdB = 20 * Log10(1+E%/100)
Power: EdB = 10 * Log10(1+E%/100)
Error(dB) -> Error(%):
Voltage: E% = (power(10, EdB/20) - 1)*100%
Power: E% = (power(10, EdB/10 - 1)*100%
"Δ" is for fine adjusting the input value.

PM(rad) vs. dB
Jn = BesselJ(rad,n)
1st(dB) = 10 * (Log10(J1*J1) - Log10(J0*J0))
2nd(dB) = 10 * (Log10(J2*J2) - Log10(J0*J0))
Input any one of them, get others.

Usually 电学计算器 iOS app used & searched for