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source:Industry News release time:2021-08-09 Article author:sznbone Popular:Prison Jamming system
When taking large-scale exams such as the high school entrance examination, college entrance examination, grade four and six, you will see signal jammers in the examination room. It can be seen that signal jammers have become standard equipment in school examination rooms, as long as it is to prevent candidates from using mobile phones to cheat.
We know that today's mobile phones have too many functions, which can be used to watch movies, record recordings, video chats, take pictures, etc. At the same time, it is convenient, and some people use mobile phones to cheat, leak questions, and search for answers on the Internet. This is very bad. In order to prevent this kind of on-site occurrence, the examination room began to use signal jammers to shield the signal of the mobile phone to prevent this kind of cheating.
Why can signal jammers prevent mobile phone cheating?
In the examination room, when using a mobile phone to send a message, it is necessary to use a signal to transmit the message. If the mobile phone has no signal, there is no way to receive and send the message. The signal blocker is a device that can prevent the mobile phone from receiving the signal. Turn on After the signal jammer, the mobile phone will lose contact with the base station, and the signal will be completely lost within the shielding range.
The principle of the signal jammer is that the frequency emitted by the jammer itself interferes with the normal frequency of the mobile phone receiving the base station, making the mobile phone unable to connect to the base station, and thus unable to make calls, receive and send text messages, and surf the Internet normally. In recent years, cheating on mobile phones has occurred in various national examinations, which has seriously affected the fairness and impartiality of examinations. For this reason, the state stipulates that mobile phone signal shielding devices should be equipped during major examinations to create a healthy and fair examination environment for candidates.
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