Submarine cable systems of a new design have recently been installed between Florida and Panama, between New Jersey and Cornwall, England, and between Hawaii and Japan. Using a single lightweight armorless cable for most of the route, with electron tube amplifiers encased in rigid containers at 20‐mile intervals, this type of system will carry 128 channels in each direction.
More detailed discussion of cable, repeaters, and power equipment will be found in companion articles. This article outlines the system development objectives, gives an over‐all system description, and describes the equalization plan and terminal equipment.
In order fully to utilize new broadband submarine cable systems it has been necessary to consider new techniques for placing the system on the ocean bottom. This article describes the general development plan that resulted in a new cable ship capable of efficiently handling any new system. The article thus serves as an introduction to the remaining articles of this special issue.
The L3 coaxial system is a new broadband facility for use with existing and new coaxial cables. It makes possible the transmission of 1,860 telephone channels or 600 telephone channels and a television channel in each direction on a pair of coaxial tubes. The principal system design problems and the methods used in their solution are described. The over‐all system is described in terms of its components and their location in the system.
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