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概述 在CATV邻频传输系统中,往往采用接收机变换器(用户机上变换器),如图1所示。变换器的作用是把CATV频道中的增补频道(即普通电视收看不到的频道)变换到VHF或UHF某一固定频道上收看。这样,普通电视机配一台用户机上变换器,在V或U频段某一固定频道上就可以收看CATV所有频道节目。
Overview CATV adjacent transmission system, often using the receiver converter (user on-board converter), shown in Figure 1. The function of the converter is to transform the additional channels in the CATV channel (that is, the channels not seen in the normal television) into a fixed channel of the VHF or the UHF for viewing. In this way, the normal TV set with a user-machine upconverter, in the V or U band of a fixed channel can watch all the channels of CATV programs.