SUPERVISORY ARRANGEMENTS FOR CARRIER REPEATER SYSTEM

摘要

A pilot-controlled transmission system is disclosed for use on communication cables. The pilot-signal is detected at a master repeater station and control pulses indicative of its level are transmitted along the cable in the opposite direction to the signals. The control pulses control slave repeaters, each of which except the last, repeats the control pulses in the opposite direction to the signals. A power pick-off filter at the output of a repeater is arranged to pick off the control pulses and a power pick up filter at the input of a repeater is arranged to apply the control pulses to the cable.