A signal that is transmitted over a long distance will be attenuated and it will pick up noise.
State what is meant by
attenuation
noise
Explain why regenerator amplifiers do not amplify the noise that has been picked up on digital signals.
A transmitter on Earth produces a signal of power 
. This signal, when received by a satellite, is attenuated by 
. Calculate the signal power received by the satellite.
.
