The working principle of the cell phone jammer: The shielding device scans from the low end frequency of the forward channel to the high end at a certain speed during the working process. The scanning speed may cause garbled interference in the message signal received by the mobile communication, and the mobile communication cannot detect the slave The base station sends normal data, so mobile communications cannot establish a connection with the base station. Mobile communication manifests itself as a search network, no signal, no service system.
Greatjammer said that the effective shielding range of the mobile signal jammer mainly depends on the following points: 1. The power of the machine itself. Many machines on the market are 5W, and the actual power is less than 1W. Therefore it must be actual power. The shielding distance of low-power machines within 1W is 1-10 meters, and the shielding range is 10-30 square meters. Remember, such a machine cannot go through walls. 2. The density of base stations near you. Now that many customers buy back their machines, 2G and 3G calls can be blocked, but 4G cannot be blocked. Why? This is because there is a base station near you. Generally speaking, there is a base station within 100 meters. If you buy a low-power machine, it basically does not work because the signal strength of the base station is too strong. It is recommended to buy a medium power shield, the ratio of each channel is more than 2W. One customer has a mobile base station on top of the building, which means that shielding has no effect. No one can solve this problem. Unless you buy a very powerful machine. 3. Field wall environment. What is the field wall environment? It is where you install the shield, whether it is a concrete wall or a glass partition. Generally, the shield cannot work through the wall. Like many customers, come to consult us. Children play games alone in the room. Can there be a partition wall that can be screened? The price is low. In this case, it is difficult to achieve. Generally, the price of the shielding instrument through the wall is very high, at least above 700.
In short, Greatjammer reminds you that the shielding range of the mobile signal shielding device cannot be solved by a single factor. The best way to buy in bulk is to use a wall meter to test the signal strength of the installation environment. The other is to buy some machines of different power, test it and see how it works, and then decide which machine to choose.