In order to ensure the security of information in the examination room, the school will implement various measures. During the examination period, the school will turn on the radio frequency jammer according to the requirements of the Education Bureau. At this time, the communication problems of mobile users near the school will be affected to a certain extent. Communication will only be normal once the exam is over. What is the function of turning on the radio frequency jammer during the college entrance examination? Can it really block all signals?
If you want to know what a radio frequency jammer does, you must first understand how mobile communications work. When the mobile phone is communicating, it must be connected to a nearby base station in order to achieve the purpose of normal communication. If you want your mobile phone to have no signal during the college entrance examination, it is impossible to disable the base station near the examination room, otherwise all communication devices in the area will not be able to communicate normally. Therefore, you can only choose a radio frequency jammer.
At present, all frequency bands of the wireless frequency jammers used in the examination room can interfere. In order to prevent sending messages through mobile phone communication, they will transmit and send garbled code interference, so that the mobile phone cannot detect the normal data sent by the base station, so the communication with the base station is blocked. Connected, mobile phones in the interference area will not show any signal or are out of service area, so they cannot receive and send signals. The radio frequency jammer can not only interfere with all frequency bands of China Mobile, China Telecom, and China Unicom, but also interfere with WIFI signals and Bluetooth.
What should be paid attention to when upgrading the wireless signal jammer to 5G in the school examination room
The use of 5G mobile phones is becoming more and more common. If the 5G signal cannot be shielded during the exam, it is easy for candidates to use 5G mobile phones to cheat. Then this requires upgrading the previous machine, so what should be paid attention to when upgrading the wireless signal jammer to 5G?
① Of course, it is the shielding frequency band of the wireless signal jammer. The wireless signal jammer installed by the school is mainly to prevent candidates from cheating through various high-tech communication methods. In addition to mobile phone 2/3/4/5G signals, WiFi signals, Bluetooth Headphones, walkie-talkies, and other signals need to be shielded.
②Effective shielding distance, for a general examination room, install at least one wireless signal jammer in a classroom of the examination room. This jammer needs to be able to block the wireless signal of the entire examination room, and it is best not to interfere with the normal life of the surrounding residents. Therefore, the effective shielding distance should be determined according to the specific conditions of the examination room.
③The stability of the shielding effect must be ensured throughout the whole process of the exam, and there should be no intermittent situations.
Finally, the wireless signal jammer operates at a low frequency when it is working, so it will not generate noise at all, and there is no need to worry about disturbing the candidates who are taking the test. At the same time, its radiation level meets the safety standards required by the country and will not cause harm to the invigilator and teachers. Candidates cause bodily harm.