文本文档 卫星ased（Text document, satellite, ased）.docVIP

文本文档 卫星ased（Text document, satellite, ased） [Edit] the role of satellite antennas The purpose of a satellite antenna is to collect weak signals from satellites and to remove as much noise as possible. Most antennas are usually parabolic, and some focus antennas are made of spherical and paraboloid antennas. The satellite signal is reflected by the paraboloid antenna and concentrated at its focus. Satellite antenna elevation and declination as well as signal debugging tutorial: /Article/436.html We often say that the antenna is big, is a metal paraboloid, will be responsible for satellite signal reflection at the focal point of feed and tuner in. Generally speaking, the bigger the antenna caliber is, the stronger the signal of the program is, the higher the reception quality is. But considering the cost, installation and other factors, users require smaller antenna caliber as possible. For example, on the C 3S band in Asia, the domestic digital programs can receive high quality images and audio with only 1.5M or smaller central satellite. And the bands of Ku programs, such as Han live satellite only 0.6M or 0.35M defender can offset antenna. But receiving the same program, different brands, some antenna of the same size but was unable to do, the reason is that the quality and accuracy of the antenna is not high, resulting in low efficiency, low gain, so the choice of satellite antenna must choose the jonsa such sophisticated technology, reliable quality, high precision of the brand-name manufacturers of products. A high quality satellite antenna requires high precision, surface corrosion resistance, strong wind resistance, high efficiency, high gain and long service life. In fancier and many users in Taiwan, jonsa at the same price of the best quality; the same quality the lowest price is recognized as a popular type of high-quality products, south of a personal user bought 10 years ago a 1.5M satellite antenna, after heavy rain and storm has surface paint intact, no