How to judge the shielding range of indoor mobile phone signal jammer?
Many customers often call and say: I need a mobile phone signal jammer with a radius of 50 meters, an interval of 500 meters, and a radius of one kilometer, and it needs to be shielded from the three networks of China Mobile, China Unicom and China Telecom.
Is there a problem with the customer's request? No problem, and specific interval requirements are also given, but can it be completed? The answer is: it is more difficult to achieve.
Why does this happen? Aren't the parameters of the signal jammer marked with its own shielding interval, can it be done by placing a few more units according to this interval?
In fact, the customer's request is not wrong, but they may not know that the shielding plan of the signal jammer is not a fixed value. This requires us to understand the working principle of the signal jammer:
The signal jammer scans the low-end frequency of the channel to the high-end at a certain speed during the operation. This scanning speed can cause garbled interference in the received message signal of the mobile phone, so that the mobile phone cannot detect the normal microwave signal data announced from the base station. In a certain plan, the mobile phone cannot be connected with the base station, so as to achieve the purpose of shielding the mobile phone signal.
Simply speaking, the frequency announced by the mobile phone signal jammer disturbs the frequency of the mobile phone to receive the base station. The jammer and the base station are destined to be a competitive connection. If the transmission power of the signal jammer is less than the channel power delivered by the base station to the mobile phone in the environment at that time. , then the jammer can't shield, as long as the power of the signal jammer is greater than the power delivered by the base station to the mobile phone, so that the shield can be effectively shielded. Therefore, any shielding device will show different shielding intervals when used in different signal environments, and China Mobile, China Unicom and China Telecom will be different, because the base station density, base station orientation and base station power built by these three operators cannot be the same. of.
That is to say, how many meters a mobile phone signal jammer can shield is not only related to its own transmission power, but also to the distance between the base stations in the use environment (base stations are not only limited to large transmission towers built on the ground, but also buildings). The signal expansion antenna on the top and the signal expansion and distribution in some buildings), another important factor is the obstacle, if it is a metal material, it will be blocked directly; if it is a solid wall of reinforced concrete, it will be less attenuated after penetration. 10 times; if it is a wooden board or a glass material, the attenuation after penetration is relatively small.
So next time a customer asks how many meters to shield the distance, you must ask the distance between the base stations in the environment, and whether it is used indoors or outdoors, whether it is necessary to pass through the wall, etc. Customers can contact us to understand the use of signal jammers. Only by understanding these can you choose a suitable signal jammer.
