The attenuation of a signal is compensnsated by

The attenuation of a signal is compensated by

What is attenuation of signal in communication system?

A signal of 0.1 kW is transmitted in a cable. The attenuation of cable is -5 dB per km and cable length is 20 km. The power received at receiver is 10^(-x) W. The value of x is _____ . [Gain in 10 log_(10) ((P_0)/(P_i)) ]

What is Attenuation ?