أجهزة تقوية إشارة الهوائي (Booster) .. كتاب التلفزيون الملون والعادي

4-6 Boosters:

​When the device is located far from the station and receives a weak signal, a signal booster can be used - which is an RF amplifier. Keep in mind that some interference and noise can amplify the signal. Therefore, it is preferable to place it in a place close to the antenna and to direct the air and its height appropriate to capture the best and largest signal. And bear as little interference and noise as possible. The booster is fed either by a transformer inside the house that reduces the AC network voltage to a rectified low voltage, and the current is transmitted through the antenna cable itself due to this low voltage. There are some devices that are powered by continuous current through a battery - Figure (4-15).

The use of a good extender may add a distance of not less than (48) km in addition to the distance from which the signal can be picked up in the (UHF) range. Figure (4-16). The booster can feed two or more monochrome or color TV sets with an output impedance of (300) or (270). As for the collective antenna (Fig. static and others