卫星电视接受器安装方法（Installation method of satellite television receiver）.doc

卫星电视接受器安装方法（Installation method of satellite television receiver） Guidelines for installation and commissioning of satellite TV Http:// 2005-4-20 15:38:15 Author: fresh_free_man Guidelines for installation and commissioning of satellite TV A, a satellite TV receiving system, satellite TV receiving system is composed of a paraboloid antenna, feed, tuner, satellite receiver is composed of a complete set of satellite ground receiving station. The 1. parabolic antenna is the convergence of the energy of the satellite signals from the air into one point (Jiao Dian). The 2. feed is provided with a horn which is afraid of the satellite signal at the focus of the paraboloid antenna, called feed source, which means the source of feeding energy, and all the energy that will be gathered to the focus is collected. Feedforward satellite receiving antenna basically by large angle corrugated feed. 3. (also known as LNB LNB downconverter) is used to reduce frequency and signal amplification and then transmitted to the satellite receiver signal sent by the satellite feed. The lower the degree of noise tuner. 4. satellite receiver is the satellite signal transmission to the tuner to demodulate the demodulated satellite TV image signal and sound signal. Polarization mode of satellite spread TV signal. There are four polarization modes of satellite TV signals: right hand circular polarization, left circle polarization, vertical polarization and horizontal polarization. Since the first two kinds of polarization are not common, only vertical polarization (V) and horizontal polarization (H) reception are introduced. The reception of vertical and horizontal polarization is the change in the direction of the rectangular (rectangular) waveguide of the feed to determine whether the receiver is vertical or horizontal polarized. When the long side of the rectangular waveguide is parallel to the ground, the receiver receives a vertical polarization and is horizontally polarized when perpendicula