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这种无人值班的差转机供装在山区小居民点(也就是使电视广播能覆盖阴影区),并作收、发黑自与彩色电视节目之用。该机全部用半导体器件装成,其电路是按电视信号频谱不解调而直接差转的原理设计的,图象与伴音共用同一频道。
This unmanned transfer machine is designed for small settlements in mountainous areas (that is, radio coverage of the shaded area) and for the purpose of blackening self-coloring and color television programs. The machine is fully equipped with semiconductor devices, the circuit is not demodulated by the television signal spectrum and the principle of direct differential design, the image and sound sharing the same channel.