Importance

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Abstract

A bidirectional amplifier that compensates for signal attenuation in a transmission medium uses a first diplex filter for directing a first signal including a pilot signal and propagating in a first direction along a first section of the transmission medium onto a first path of the amplifier. A second diplex filter directs a second signal in a different frequency band than the first signal that is propagating in a second direction opposite to the first signal along a second section of the transmission medium onto a second path of the amplifier. The first and second paths interconnect separate sections of the first and second diplex filters. A compensating device is disposed in the first and second paths wherein a pilot detection circuit detects the pilot signal in the first signal and generates therefrom separate control signals to first and second Bode Slope Equalizers in the first and second paths, respectively. The first and second Bode Slope equalizers separately change the equalization of each of the first and second signals across the first and second frequency bands, respectively, propagating in the respective first and second paths to separately change the amplification of the first and second signals, respectively, in order to compensate for signal attenuation changes occurring in the first section of the transmission medium.

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First Claim