When the mobile phone is working, it connects the mobile phone and the base station through radio waves within a certain frequency range, and completes the transmission of data and sound at a certain frequency and frequency. According to this communication principle, during operation, the cell phone jammer scans from the low-end frequency of the previous walkie-talkie to the high-end frequency at a certain rate. When the mobile phone receives the information signal, the scanning speed will cause garbled interference. The mobile phone cannot detect the normal data sent by the base station and cannot establish a connection with the base station. Mobile phones have the characteristics of network search, no signal, and no service system.

After the equipment is turned on, press the power switch and the cutting machine will start working. At this time, all open mobile phones are in network retrieval state and have lost the base station signal. Customer service callers cannot be contacted by phone.

The mobile phone is within the frequency range, and the mobile phone and the base station are connected through radio waves to complete the transmission of data and sound at a certain baud rate and frequency.

Introduction to the principle of mobile phone signal screen (shielding).

According to the above communication principle, the signal blocker for sale scans the low-end frequency to the high-end channel at a certain speed during the working process. This scanning speed can cause garbled interference in the information signal received by the mobile phone. The mobile phone cannot detect the normal data of the base station, and the mobile phone cannot establish a connection with the base station. There are phenomena such as network search, no signal, and no service system on mobile phones.

Application scope.

This system uses frequency doubling, frequency division, hopping and other technologies to design a spherical shielding space for the uplink and downlink channels of the mobile phone system based on the analysis of the shielding power required for the shielding frequency, and automatically forms a shielding magnetic field within the specified range, making the mobile phone ( Including PHS - PHS - China Unicom, China Mobile, CDMA - China Telecom) are invalid in this space. When the screen is in working condition, it can invalidate the signal receiving and sending functions of mobile phones within the specified range, making it impossible to send and input, achieving the purpose of forced invalidation.

It is suitable for various examination rooms, conference rooms, gas stations, oil depots, churches, hospitals, courts, important military places, libraries, theaters and other places.

However, in densely populated areas such as schools, it is prohibited to set up broadcasting stations with electromagnetic radiation that exceeds the standard, and signal jammers are not allowed to be used without authorization.