卫视爱好者常用一面正馈天线接收一颗卫星信号即一锅一星,因为普通的天线只有一个焦点,仅能安装一个高频头来接收一颗卫星的信号。而一些发烧友们在用焦点接收主卫星的同时,利用偏离主焦点的所谓“偏焦点”(俗称,其实严格意义上讲还是散焦)位置,再安装几个高频头,并作适当地调? Satellite dish lovers often use a positive antenna to receive a satellite signal that is a pot of a star, because the common antenna has only one focus, only to install a high-frequency head to receive a satellite signal. While some enthusiasts focus on receiving the main satellite at the same time, deviate from the main focus of the so-called “partial focus” (commonly known, in fact, or defocused) position, and then install a few tuner and make appropriate adjustments ?