许多城市,现在已开通有线电视,由于频道多,故需采用“增补频道”。笔者在实践中常采用以下办法来接收“增补频道。”首先,对于信号源较少的有线电视台(约14套节目),为使用户能收看,采用Z5、Z6、Z7、Z8等几个增补频道,基中,Z5～Z7频道一般电视能够收看,Z8在12频道之后,有的电视机无法收看。此时,只须打开电视机的高频头,找到VHF—3段的电感(约3 Many cities now have cable television enabled. Due to the large number of channels, “additional channels” are required. In practice, I often use the following methods to receive “additional channels.” First of all, for the less cable TV stations (about 14 programs), in order to allow users to watch, using Z5, Z6, Z7, Z8 and several additional channels , Base, Z5 ~ Z7 channel to watch the general television, Z8 Channel 12, some TV can not watch. At this point, simply turn on the TV tuner and find the inductance of the VHF-3 segment (about 3)