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Selection of proper satellite antenna site: (www.dxdvb.com) reprinted

Release Date:2013-09-24

Reproduced in shenzhen satellite TV installation site www.dxdvb.com satellite antenna reasonable choice: satellite TV receiving antenna is set up on the ground or building, site selection is a primary part. Must give full consideration to the local natural environment and the electromagnetic environment, site selection basis including: field strength of satellite signal, the interference of surrounding environment, convenience of operation, networking of convenience and other factors. Siting all should pay attention to the following: 1, there cannot be any obstacles in antenna pointing in the direction of satellite, which will have an open field of vision. Satellite antenna aperture size, should be set up in local open as much as possible to the top, to avoid the slopes, woods, high-rise buildings, tower, radar station, ChaZhuanTai and high voltage transmission line, microwave stations on the antenna beam block. Antenna main beam direction should have enough vision, the Angle of front antenna should be as wide as possible. For reference, analyzing the general requirements for antenna obstacles peak into the Angle is less than 3 degrees. 2, satellite antenna, especially of large aperture antenna erection, must have the solid foundation, to ensure bearing antenna can fully own load, not collapsed or were even in case of strong wind pull up "the root". Satellite receiving antenna erection position should avoid tuyere, as to reduce the wind load of antenna, the antenna of the wind load is too large will cause deformation, affect the signal reception. 3, there should be no disturbance sources around the satellite antenna. Of the antenna direction to avoid radar station, ChaZhuanTai, microwave stations and power lines, etc., should try to avoid these interference sources; On the same frequency interference, due to the effect of frequency selective of the satellite receiver, allow the interference level is greater than the signal level, but not too much, the high-frequency head into the saturation state (receiver input level range for 60 DBM - 30 DBM), otherwise will join between high-frequency head and feed bandpass filter, filter out interference signal. In the microwave interference serious should pay special attention to when building in the city buildings, in order to guarantee the quality of reception, the general should use a spectrum analyzer or microwave field strength meter field measurement of satellite antenna erection position, using terrain and buildings cleverly avoid the microwave interference. 4, if on one building, consideration should be given in the case of the storm station due to the stress on the roof of the devastating impact, namely the bearing capacity of the building. To meet 10 level winds can work, 12 class gale is not damaged. 5, if mounted on the ground, especially in rural primary and secondary schools to pay attention to the block buildings, fences, trees, more attention should be paid to students' safety, want to install where students is not easy to meet as far as possible, or added a fence around the antenna. Rf cables go line adopts buried or aerial, 20 mm should be used when the underground buried steel pipe or PVC tube cable jacket, aerial height to over 2.5 m, the distance of more than 10 m hanging in the sky, with a steel strand bearing. 6, constructing the satellite receiving antenna, want to consider the distance of outdoor installation position and indoor receiver as short as possible, should be made to the receiver socket rf cable is short, as far as possible to reduce the signal loss caused by transmission line is too long. Generally within 30 m. Choose to use the coaxial cable with better performance should be considered a transmission line, had better use 75-7 or 75-9 lotus root cable or high physical foaming cable, cable joint should be waterproof processing. More than 7, the thunderstorm area, satellite antenna erection location to avoid frequent lightning place, at the same time to take a variety of lightning protection measures to prevent lightning, such as to install the lightning rod, lightning grounding should be good, technique support: 13006694393 www.dxdvb.com

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