If the input signal power to a communication system is 1 W and the output power is 1 mW, the system attenuation is:

Question

Quizplus · Accepted Answer

Attenuation in dB is calculated using the formula: 10 * log10(Pout/Pin). Here, Pout = 1 mW = 0.001 W and Pin = 1 W. So, attenuation = 10 * log10(0.001/1) = 10 * log10(0.001) = 10 * (-3) = -30 dB. Since attenuation is a reduction, we take the absolute value, which is 30 dB.

If the Input Signal Power to a Communication System Is