What Should I Consider when Buying an Antenna Amplifier?

Antenna amplifier is also called pre-amplifier, English is generally called Mastheader Amplifier, and some European and American countries are called Pre-amplifier or Antenna Amplifier, Amplificador, etc. It is an ultra-high frequency, broadband and low noise amplifier used between antenna and feeder.

Antenna amplifier

Antenna amplifier is also called pre-amplifier, English is generally called Mastheader Amplifier, and some European and American countries are called Pre-amplifier or Antenna Amplifier, Amplificador, etc. It is an ultra-high frequency, broadband and low noise amplifier used between antenna and feeder.

Antenna amplifiers are usually used to enhance weak signals received and improve the quality of information reception.

Chinese name

Antenna amplifier

Foreign name

Mastheader Amplifier

famous brand

Boligo, Shibei, Wanshida, Wanshibao

Place of production

Southeast Asia

About Antenna Amplifier

Antenna amplifier is also called pre-amplifier, English is generally called Mastheader Amplifier, and some European and American countries are called Pre-amplifier or Antenna Amplifier, Amplificador, etc. It is an ultra-high frequency, broadband and low noise amplifier used between antenna and feeder. It is used to enhance the weak signal caused by the long receiving distance, to compensate the loss of the transmission distance between the antenna and the TV, and

(1) Pay attention to the installation position The antenna amplifier usually consists of two parts: the amplifier and the power supply. When the antenna feed line is short (generally refers to the use of indoor antennas), the antenna amplifier can be placed next to the TV; when the antenna is set high and the feed line is long, the two parts should be placed separately, and the enlarged part is sealed by a waterproof box Later, it can be installed at the end of the support rod 1 ~ 1.5m away from the antenna element, and the power supply part can be placed near the TV, so that the signal-to-noise ratio of the TV signal can be improved.

(2) Channels must match. Antenna amplifiers are generally divided into two categories, VHF and UHF. The VHF type can amplify the TV signals of channels 1 to 12 and the UHF type can amplify the TV signals of channels 13 to 68. In use, the antenna amplifier should match the TV channel to be received.

(3) Pay attention to impedance matching The output impedance of the antenna amplifier and the antenna output terminal and the input impedance of the TV should match. The feeder should not be too long, that is, the antenna cannot be mounted too high or too far. Otherwise, although an antenna amplifier is added to the TV, the enlarged signal will be severely attenuated during the transmission to the TV, resulting in a slight improvement in the reception effect. In addition, the input and output feeder lines of the antenna amplifier must not overlap or be too close to each other to avoid feedback or interference.

(4) The gain must be selected. The gain of various types of antenna amplifiers is different, and generally there is a difference between high and low. High-gain antenna amplifiers typically have a gain of 30 to 60 dB. They can be used with multi-channel Yagi antennas to receive television programs hundreds of kilometers away. The low-gain antenna amplifier has a gain of 20 to 4OdB, and can receive programs several tens of kilometers away. Make appropriate choices when selecting, but not higher gains are better.

(5) Check the installation effect If the image received by the indoor large-line cable is poor, and good results can be obtained when installing the outdoor antenna, you can still use the indoor antenna after using the amplifier. If the viewing effect of the TV does not change significantly after the antenna amplifier is installed, or the viewing effect is worse than before, it is caused by an installation error, and should be carefully checked before correcting according to the correct installation method.

(6) Have good antennas and lightning protection equipment. If a TV user using an outdoor antenna needs to install an antenna amplifier, it must have a good multi-unit antenna to cooperate with it and lightning protection equipment must be installed to prevent lightning strikes.

A small signal to noise

High sensitivity

Three better water resistance

Four volumes should be smaller

Five metal casing is better

Six provinces

Seven convenient wiring

Overseas: Antiference, Global, Johansson, Fracarro, Fringe, Ikusi, Ikusi Labgear, Maxview, Paragon, Philex, Proception, Televes, Triax, Vision, Wolsey

But most of the above products are mainly produced in Southeast Asia, especially in China.

Domestic: Boligo, Shibei, Wanshida, Wanshibao, Jiaxun

These brands are also OEMs for many foreign brands. The quality of some brands can be directly pointed to foreign first-tier brands.

Application example of home antenna amplifier

In this illustration, the most basic equipment such as the home antenna amplifier 7322 and the branch distributor of Johansson, Belgium are used. The European test report indicates that in open conditions, it can receive HDTV, even on the highway, near mobile base stations or mountains, etc., can still achieve a clearer video signal, ideal gain, anti-interference , Especially in terms of anti-mobile signal interference, it is worthy of recognition. DirectTV, the world's largest supplier of live satellite television and terrestrial high-definition programming, is cooperating with this brand.

Of course, some domestic brands can achieve this quality.