梁丰 张祥满 邓金锋

【摘要】近年来，无线电视和有线电视在城市得到了较快发展，但是在我们这样的山区县无线电视有线电视覆盖率仅达到40%多，仍有50%的高山群众利用卫星廣播电视接收设施收听收看广播电视节目，这些群众基本上都居住在交通不便的高寒边远山区，上门服务很不方便，群众对卫星广播电视接收设施的选购、安装和调试技术还比较缺乏，让更多的群众了解卫星广播电视接收设施的选购、安装和调试知识很有必要，现结合这几年工作来讲述一下卫星广播电视地面接收设施的选购、安装和调试技术。

【关键词】广播电视接收设施；选购；安装；调试

[ Abstract ] in recent years, wireless television and cable television in the city had rapidder development, but in the US such a mountainous area county radio and television cable TV coverage only reached more than 40%, there are still 50% mountain masses using satellite radio and television reception facilities tune in radio and television programs, these people basically lived in traffic inconvenience in the remote and a mountainous area, on-site service is convenient, the masses of satellite radio and television reception facilities for the purchase, installation and debugging technology is still lacking, let more people understand the satellite radio and television reception facilities for the purchase, installation and debugging of knowledge is necessary, the combination of these a few years of work to describe radio and television satellite ground receiving facilities for the purchase, installation and debugging technology.

[ Key words ] radio and television reception facilities; purchase; installation; debug

中图分类号：TU248 文献标识码：A文章编号：

一 卫星广播电视接收设施的组成和作用

卫星广播电视接收设施由以下4部分构成。

1 地面接收天线（俗称卫星锅）。作用：反射、聚焦卫星下行微波，使微波会聚于高频头处。

2 高频头（也称为下变频器）。作用： 对接收的信号进行放大、变频。

3 射频连接线。作用：把高频头输出信号传入卫星接收机 。

4 数字卫星电视接收机（含遥控器、音视频线） 。作用：选台、 解调 、解码输出音视频信号 。

二卫星广播电视接收设施的选购

卫星广播电视接收设施的选购取决于用户需要收看的节目，主要包括接收天线、高频头和接收机的选购。

（一）如果用户需要接收“农村党员远程教育节目、中央教育电视台节目3套” 则用户可以购买亚太6号卫星（东经134度）KU波段接收设施。

1天线的选购……