“盲扫”是近2年新出现的名词, 所谓“盲扫”是指用户在不知道卫星参数的情况下搜索节目,用户可以对参数了解甚少或者完全不知道,只要天线对正了,就没有问题。操作简便易懂,不需要有专业知识,任何人都很容易操作,这个功能现在已经广泛应用于数字机领域。对于早期接收机设计而言,卫星数字接收机增加盲扫功能是较为困难的,数字信号在接收之前要知道许多参数,例如下行频率,符号率2M-45M,FEC(前向纠错可分为1/2,2/3,3/4,5/6,7/8),极化(水平/ 垂直)等等,缺一不可。这麽多的变量加在一起,而且要同时从950MHz-2150 MHz(接收机可以接收的信号)这麽宽的范围进行搜索,所 “Blind scan ” is a newly emerged noun in the recent 2 years. The so-called “blind scan” means that the user searches for programs without knowing the parameters of the satellite. The user can know little or no information about the parameters as long as the antenna Align, there is no problem. Easy to understand, do not need to have professional knowledge, anyone is easy to operate, this feature is now widely used in the field of digital machines. For the early receiver design, it is more difficult for the satellite digital receiver to increase the blind scanning function. The digital signal needs to know many parameters before it is received, for example, downlink frequency, symbol rate 2M-45M, FEC (forward error correction can be divided into 1 / 2,2 / 3,3 / 4,5 / 6,7 / 8), polarization (horizontal / vertical) and so on, are indispensable. So many variables are added together and searched simultaneously over such a wide range from 950MHz-2150MHz (the signal the receiver can receive)