Attenuation in a channel is the reduction in signal amplitude due to loss of energy, Attenuation is the unwanted and beyond our control waves that disturb the transmission of signals., in crosstalk, A signal in one line is leaked to an adjacent line because of electrical coupling, noise is Two signals transmitted on a channel simultaneously, Noise is the unwanted signal, there are .two types of distortion, distortion is measured by the ratio of output amplitude to input amplitude, attenuation is the opposite of amplification, attenuation is un wanted signal that disturb the signal, signal to nois ratio is the signal strength relative to noise power.

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