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source:Industry News release time:2021-09-29 Article author:sznbone Popular:Prison Jamming system
There are many types of jammers. Before purchasing, you should clarify your needs and be targeted to get twice the result with half the effort. First of all, let us briefly understand the basic points that should be understood in the purchase of shielding devices.
The basic principle of shielding? Within a certain frequency range, the mobile phone and the base station are connected by radio waves, and the data and sound transmission are completed with a certain baud rate and modulation method. The jammer scans from the low end frequency of the forward channel to the high end at a certain speed during operation. The scanning speed can cause garbled interference in the message signal received by the mobile phone. The mobile phone cannot detect the normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station and achieve the purpose of shielding the mobile phone signal. No service system and other phenomena.
The shielding effect is affected by those factors? In the actual use environment, the interference signal emitted by the wireless signal shielding device is affected by various factors, 1. The position of the shielding device. Indoor-type shielding device is recommended to be placed at a height of about 180cm-220cm above the ground, and the angle is better to be inclined forward. 2. Whether there are obstructions (such as walls, metal products, human bodies, etc.) between the jammer and wireless communication equipment (mobile phones, etc.). The interference signal emitted by the jammer will be attenuated to different degrees after passing through the obstruction, please try to avoid it. 3. The original wireless communication signal strength in the application environment of the jammer. The weaker the wireless communication signal strength in the use environment, the stronger the theoretical shielding effect of the jammer. The distance between the application environment of the jammer and the communication base station. The farther the jammer application environment is from the base station, the stronger the theoretical shielding effect of the jammer.
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