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source:Industry News release time:2021-04-14 Article author:sznbone Popular:Prison Jamming system
Do you know how to realize signal shielding when the wireless signal jammer in the examination room? Do you really know its shielding principle? Let's learn together:
1. In the working process, scan from the low end frequency of the forward channel to the high end at a certain speed. The scanning speed can cause garbled interference in the message signal received by the mobile phone, and the mobile phone cannot detect the normal data sent from the base station, making the mobile phone unable to establish a connection with the base station, achieving the purpose of shielding the mobile phone signal.
2, interfere with the mobile phone receiving the frequency sent by the base station and the wireless router through its own frequency, so as to achieve the purpose of shielding them.
3. In a certain frequency range, the mobile phone and the base station are connected by radio waves, and the data and sound transmission is completed with a certain baud rate and modulation method. In the working process, scan from the low end frequency of the forward channel to the high end at a certain speed.
4. The functional characteristics of electromagnetic waves are determined by its frequency. The mobile phone must emit electromagnetic waves that meet the request before connecting to the base station of the communication operator. The jammer transmits the same radio frequency as the mobile phone. Because the frequency is the same, the mobile phone can't tell which signal is the base station signal on the track, and completes "interference". In a cyclic manner, the interference bands corresponding to the three signals are played repeatedly, and the three bands are covered at one time, and the distance of this loop is small, resulting in the mobile phone basically having no opportunity to speak.
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