论文部分内容阅读
本系统是用同一根光纤传输视频图象信号和音频信号的光缆传输系统。视频信号作为基带传输,音频信号调频在8MHz载频上。信号在接收机输出端又复原为视频信号和音频信号。该实用系统于83年6月份提供给辽宁电视台使用一直剑现在,运行良好。4公里彩电光缆传输系统于1983年12月22日至25日在四川永川通过了电子工业部部级产品设计定型。中央广播电视部,重庆测试仪器厂,辽宁电视台、重庆电视台等有关电视台及有关大专院校、科研单位等60余个单位的专家、教授、工程技术人员参加了鉴定会。与会者对本系统给予了高度评价,认为该系统无论从传输距离或是各项技术指标均处于国内领先地位,达到了国际同类产品80年代先进水平。
The system is using the same optical fiber transmission video and audio signals and signal transmission system cable. The video signal is transmitted as a baseband, and the audio signal is frequency modulated on an 8MHz carrier frequency. The signal is restored to the video and audio signals at the output of the receiver. The utility system was supplied to Liaoning TV Station in June 83 and has been using the sword now and it works well. 4 km cable TV transmission system in December 22, 1983 to 25 in Yongchuan, Sichuan Province, Ministry of Electronics Industry through the ministerial product design stereotypes. CCTV, Chongqing Testing Instrument Factory, Liaoning TV Station, Chongqing TV Station and other relevant television stations, and more than 60 units of tertiary institutions, research institutes, professors, engineers and technicians attended the appraisal meeting. Attendees highly appraised the system and believed that the system is at the leading position both in transmission distance and various technical indexes and reached the international advanced level in the 1980s.