Basic knowledge points about mobile phone signal jammers
In life, cell phone signal jammers are very common, and have you remembered a lot of professional knowledge about mobile phone signal jammers?
The signal shielding device is mainly used in various examination rooms. Schools, prisons, public security agencies, gas stations, movie theaters, hospitals, government departments, churches, courts, public libraries, conference halls (core), financial industry, national defense areas and other places where mobile phones are strictly prohibited. According to statistics, the mobile phone signal jammers currently on the market can limit the freedom of transmitting mobile phone data signals beyond 500M meters and with a radius of >20 meters. The shielding semi-circuit is adjustable, it only blocks the mobile phone data signal and does not cause harm to other electronic products. Save electricity, the output power is 20W--480w.
When the mobile phone is working, it is within the corresponding operating frequency range. The mobile phone and the communication base station are connected using electromagnetic waves, and the information and sound effects are transmitted with the corresponding serial port baud rate and deployment method. For this kind of communication principle, the mobile phone signal jammer passes from the low-end frequency of the wireless channel to the high-end scanner at the same rate during the operation process.
Its detection speed can cause errors in the packet format signals received by the mobile phone. The mobile phone cannot detect the regular data sent from the base station, so that the mobile phone cannot establish a connection with the base station. The main symptoms of mobile phones include searching the network, poor signal, and no service system.
Currently, the commonly used signal jammers on the market have effective frequencies: 869~894MHz; 825~960MHz; 1805~1880MHz and 1900~1990MHz, etc. The functional frequency range is CDMA800.GSM900.DCS1800.PCS1900. It can control an area of 40 meters in diameter and use DC-DCSPWM to input working voltage and 5V output voltage.
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