有线电视已进入千家万户,原有的5—8套电视节目一下子增加到20多套,大大丰富了电视节目源。但有线电视技术对大多数人来说还比较陌生,在实际收看过程中常会遇到一些问题,以下介绍解决方法。1.连接方法不当。目前各有线电视台均使用双孔用户盒,供收看(TV)及收听调频(FM)广播用。有些有两台电视机的家庭,往往把“三通”插座直接到“TV”孔中,将电视信号简单地分成两路送到电视机。这样将导致连接阻抗不匹配,在用户连线上产生反射波,因而在显示的图像上产生重影。这种市售的三通插孔没有采用任何隔离方法,从而使两台电视机之间产生相互干扰,如出现图像跳动、重影、网纹及雪花点等问题,严重对甚至会 Cable television has entered millions of households, the original 5-8 sets of television programs suddenly increased to more than 20 sets, greatly enriched the source of television programs. However, cable TV technology is still relatively unfamiliar to most people. During the actual viewing process, some problems often occur. The solutions are as follows. 1. improper connection method At present, all cable television stations use a dual-use subscriber box for watching TV and listening to FM radio. In some households with two TVs, the “three” jacks are often routed directly to the “TV” hole, splitting the television signal into two simple channels. This will result in a mismatch in the impedance of the connection and a reflected wave on the user’s wiring, thus causing ghosting on the displayed image. This commercially available three-way jack does not use any isolation method, so that the two TVs interfere with each other, such as image beating, ghosting, textured and snowflake points and other serious problems even