The jammer prevents the phone from working normally

Many users who use a wireless phone signal protector do not know its working principle and often use it outside the frequency range, resulting in poor use. jammer-shop is a well-known manufacturer of wireless signal blockers, we think it is necessary for you to have a good idea of ​​how it works, so that users can get better results. The working principle of mobile communication is that within a certain frequency range, wireless devices (mobile phones, etc.) are in contact with radio waves, and the base station transmits data and voice at a certain form of baud rate and full modulation. When the phone communicates, it communicates with the base station through the uplink frequency, and then transmits the signal to the mobile services switching center to make the call. In the standby mode, the mobile phone communicates with the control channel of the base station through wireless means. Once necessary, it first inquires the mobile according to the specific situation of the terminal near the channel allocated to the telephone service channel.

According to the previous working principle, a mobile phone cell phone blocker usually consists of a power supply, an electronic scanning control unit, a segmented radio frequency module unit, an amplifier unit, and a transmitting antenna unit. After the signal generator generates the scan signal, the inverter is placed on the oscillator, and the frequency is modulated by mobile communication, and controlled by the power amplifier, power amplifier and voltage regulator tube, the amplified frequency sweep signal is thrown into the air in the form of radio waves. Since a frequency sweep signal is formed when receiving a mobile phone message, resulting in chaotic interference (increasing the proportion of noise signals in the noise signal to the device threshold), the mobile phone cannot receive normal data from the base station, and the mobile phone cannot establish a normal connection with the base station. Therefore, it is impossible to connect from the communication network of the base station. The mobile phone does not display signals in the search network, there is no service system or other phenomena to achieve the blocking effect.

The interference power of the signal suppressor is real, and the shielding radius of the non-blocking space is determined by the path attenuation and signal level of the receiving base station. To achieve cell phone signal blocking in mobile networks, it is necessary to ensure that the field strength interference signal is greater than the area where the field strength mobile signal interference is achieved. The interference location should be so close to the base station. The greater the field strength, the smaller the effective area of ​​interference. On the contrary, it is away from the base station. The farther the position, the weaker the field strength, and the larger the effective interference area. Where to use gsm jammers, the Vatican Security Department has installed a device to block Internet and cell phone signals in the new elections of the Pope in Rome. The jamming device will prevent the cardinal and staff including Vatican maintenance personnel from installing microphones to obtain information. According to the TV station, anyone who violates the ban will be expelled from the church.

Ural State University is located in Yekaterinburg, which is the hometown of former Russian President Boris Yeltsin. The principal, Stanislav Nabokov, said his school was the first to test all the mobile devices installed in the school, one of which cost up to 2 million rupees (£39,000). “Every year we meet a lot of bold students in the entrance exam, and use their mobile phones to get a lot of external tips.” Nabochenko said.

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