If you take a large exam, you will see a signal jammer in the examination room. It can be seen that the signal jammer has become the standard configuration in the school examination room, mainly to prevent examinees from cheating by using mobile phones.

We know that today's mobile phones have too many functions, such as watching movies, video chatting, taking photos, etc. At the same time, some people will use their mobile phones to find answers on the Internet to cheat. This is a very bad thing. In order to put an end to this situation, the examination room began to use signal jammers to block the signals of mobile phones to prevent this cheating.

In the examination room, when using mobile phones to send information, you must use signals to send messages. If mobile phones do not have signals, there is no way to receive and send messages. The signal jammer is a device that can prevent the mobile phone from receiving signals. After the signal jammer is turned on, the mobile phone will lose contact with the base station and completely lose the signal in the shielded area.

The principle of the signal jammer is that the frequency it sends interferes with the normal frequency of the mobile phone receiving base station, making it impossible for the mobile phone to connect to the base station, so that it cannot normally receive or make calls and surf the Internet. In recent years, the phenomenon of cheating on mobile phones in various national examinations has occurred from time to time, which has seriously affected the fairness and impartiality of the examination. For this reason, I suggest that signal jammers should be equipped during large-scale examinations in order to create a healthy and fair examination environment for examinees.