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TRW公司的技术研究中心(地处加利福尼亚埃尔西同多(EI Segundo)研制出一条新型的数字光纤传输线路,能够在一根单模光纤上传送6路复用视频信号。该系统称作“光纤数字共用有线电视(CATV)超级线路”,在可20公里以上距离天中继发送播送台质量信号。虽然该系统还处于实验阶段,但是TRW公司希望最终将其“超级线路”销售给电缆电视公司,使其将播音室来的节目传送到系统分配点。光缆目前正用于这类场合,但应用的模拟技术所提供的传输质量,要比用数字系统可能
TRW’s Technology Research Center, located in El Segundo, Calif., Has developed a new digital optical fiber transmission line that can deliver up to 6 multiplexed video signals on a single-mode fiber called the “ Fiber-Optic Digital CATV Super-Line, ”which sends broadcast station quality signals over a distance of more than 20 kilometers from a day relay. Although the system is still in experimental stages, TRW hopes to eventually market its“ super-line ”to cable television Company that made it send programs from the studio to the system distribution point.The optical cable is currently being used for such applications but the quality of the transmission provided by the applied analogue technology may be better than with a digital system