有线电视增补频道引起彩电自动搜索异常的处理方法

The Method to Tackle Automatic Searching Fault of TV Receiver Caused by Complementary Channels of CATV

针对有线电视开始传输增补频道信号后 ,某些彩电在自动搜索存台时出现直流关机、自动搜索停止、自动升频搜索变为自动降频搜索等现象 ,从有线电视频道的设置原理、增补高频头的内部结构及辐射特性等方面进行了深入的理论分析 。

Since the signals of the complementary channels was transmitted in CATV system, some abnormal phenomena such as turning off, stopping automatically, changing unexpectedly from frequency rising to dropping, appeared within the color TV receivers in the process of automatic searching channel.Analyses the causes theoretically and gives some practicable method to tackle the problems.