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随着人们对有线电视问题的兴趣日益增加,我们将编写并出版阐述这类问题的手册。应许多企业及单位的要求,本期刊载了批量生产的天线的简要技术特性,可供建立有线电视系统之用。本刊以后将介绍电缆,无线电视设备,检测仪器等,以供安装有线电视系统及较简单的共用接收系统之用。由于曾经广泛地采用电视广播以及必须大量地减少城市建筑物屋顶上的天线数目,我国在50年代中期即开始兴建有线电视共用接收系统(CKΠT)。利用CKΠT可以把数十个电视接收机与一个天线相接,提高被接收的信号的质量指标,并保证能够
As people’s interest in cable television is on the rise, we will prepare and publish handbooks that address such issues. At the request of many companies and organizations, this issue contains a summary of the technical characteristics of mass-produced antennas for use in the establishment of cable television systems. The publication will introduce cable, wireless television equipment, testing equipment, etc., for the installation of cable television systems and simple common receiving system. Due to the widespread use of television broadcasting and the significant reduction in the number of antennas on the rooftops of urban buildings, China began to build a cable television reception system (CKΠT) in the mid-1950s. Using CKΠT, dozens of television receivers can be connected to an antenna to improve the quality of the received signal and ensure