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近几年来 ,随着我国卫星技术发展 ,卫星广播电视事业得到了迅速普及和推广。同时 ,随着高频头噪声温度和解调器门限电平的进一步降低 ,使用小口径天线接收卫星电视已成为现实。现中央电视台和各省电视台都已经通过卫星转发电视节目 ,给地面有线电视网提供了丰富的节目来源 ,促
In recent years, with the development of satellite technology in our country, the satellite broadcasting and television business has been rapidly popularized and popularized. At the same time, with the further reduction of tuner noise temperature and demodulator threshold levels, the use of small-aperture antennas to receive satellite television has become a reality. Now CCTV and provincial TV stations have already transmitted television programs via satellite, providing a rich source of programs to the terrestrial cable television networks.