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1.机外驳接有线电视增台器有线电视增台器又叫一次变频式机上变换器。普通电视机收不到增补频道节目,不是因为它的波段太窄,而是由于它与传输系统所覆盖的频率不一致造成的。增台器就是充分利用普通电视机U段高段所覆盖的空闲频率,将111～470MHz频段内信号经一次变频到550MHz以
1. Outside the docking cable TV set by cable TV set by Taiwan also known as a frequency conversion machine on the converter. Ordinary TV can not receive additional channel programs, not because its band is too narrow, but because of its inconsistency with the frequency covered by the transmission system. By Taiwan device is to make full use of ordinary TV U segment high frequency coverage of idle frequency, the frequency band 111 ~ 470MHz by a frequency conversion to 550MHz