L5 System: Line-Power Feed

The repeaters and equalizers in the L5 coaxial-carrier transmission system are spaced at approximately one-mile intervals along the cable system. Dc-to-dc converters operating on station battery power and spaced up to 75 miles apart are employed to furnish a constant current of 910 mA at voltages up to 1150 V dc over the coaxial line to the series-connected repeaters and equalizers. This article describes the line-power-feed system and equipment with emphasis on the features that simplify (or automate) system operation and that minimize the 1987 effect of foreign voltages which may be injected into the system between stations.