What is a Digital Signal Amplifier?

The signal amplifier is a miniature repeater, also called a mobile phone signal amplifier, also called a mobile phone companion. Signal Amplifier From its name we know that its function is to amplify a signal. There are many types of signal amplifiers, such as television signal amplifiers and radio amplifiers. All receivers have signal amplifiers. The amplifier that specifically amplifies the mobile phone signal is called a mobile phone signal amplifier, which is mainly used to solve the indoor cell signal blind spot problem.

use

In the downlink, the repeater picks up signals in the existing coverage area of the base station by the donor antenna, and uses a bandpass filter to isolate signals outside the bandpass. The filtered signal is amplified by the power amplifier and transmitted again Go to the area to be covered. In the uplink path, the signal of the mobile phone in the coverage area is processed by the uplink amplification link and transmitted to the corresponding base station in the same way, so as to achieve the signal transmission between the base station and the mobile phone. The types of repeaters are generally divided into broadband repeaters, frequency selective repeaters, fiber repeaters, frequency shift repeaters, and trunk amplifiers according to the actual application. For other special applications, there are also some other types of repeaters. Repeater equipment as electronic equipment, in addition to some accidental failures caused by human factors, often cause various failures due to environmental influences, sudden changes in operating conditions, and aging of component performance.

This is a relatively common phenomenon. Mobile phone base stations are installed in many residential buildings in urban areas. Some citizens are worried whether the electromagnetic radiation generated by such devices will be harmful to the human body. In fact, we need not worry about this issue. Cell phone radiation is different from cell phone radiation. Generally, the electromagnetic radiation value of a mobile phone is between 0.03-0.7, while the radiation value of a mobile phone base station is 10 microwatts. The radiation value produced by a mobile phone base station is not much higher than that of a mobile phone! Speaking of which, it is more worth mentioning that when the mobile phone signal is poor, the mobile phone will continuously search for signals, and the radiation generated at this time will greatly increase. Being in such an environment for a long time is harmful to the human body.

In addition, the closer the electromagnetic radiation is, the longer the radiation time, the deeper the damage! The mobile phone base station installed on the roof of our general residential building is a safe distance from us, so everyone can rest assured.

In general, the requirements for signal amplifiers should mainly be based on the technical requirements of the base station.

1. Select the model. The mobile phone signal amplifier mainly selects the model based on the signal coverage area and the structure of the building. The signal is too weak, the coverage is incomplete, the signal is too strong, and it interferes with outdoor signals;

2. Arrange the antenna. The directional Yagi antenna is used outdoors, and the direction of the antenna can be directed to the transmitting base station of the mobile company as far as possible to achieve the best reception effect. The omnidirectional antenna can be used indoors, and the installation height is 2-3 meters. The installation quantity and location of the antenna and the indoor area It is related to the indoor structure. An indoor unobstructed range of 300 square meters requires only 1 antenna, a range of 300-500 square meters requires 2 antennas, and a range of 500-800 square meters requires 3 antennas. In addition, the signal sent by the indoor antenna during installation cannot be received by the outdoor antenna, otherwise self-excitation may occur;

3. Installation of mobile phone signal amplifier. Generally, it should be installed more than 2 meters above the ground. The shortest distance wiring (the longer the line, the greater the signal attenuation) will be used for the equipment installation location and the distance between the indoor and outdoor antennas to achieve the best results.

First check the outdoor antenna, especially the Yagi antenna. Because the Yagi antenna is directional, make sure that its position has not changed and whether the installed screws are loose.

After checking the outdoor, check the indoor, whether the wiring is installed, and the power supply is connected. If there is a potential safety hazard, you can prevent it before it happens.

Let's look at the host of the mobile phone signal amplifier and see if the indicators on the panel are normal. Normally, the uplink and downlink power should be on.

Finally, if any fault is found, it should be maintained and repaired in time ^[1] .