What is the role of the signal jammer in the exam room during the exam?
Although the time of the college entrance examination this year has been postponed due to the impact of the epidemic, in order to ensure the security of information in the examination room, the corresponding protective measures have not been reduced at all. During the examination, relevant departments will open the signal jammers in the examination room at each examination center, which may affect the communication quality of mobile phone users around the school. The communication will not return to normal until the examination is over. What is the effect of turning on the cell phone signal jammer in the exam room during the exam?
In order to know what the function of blocking mobile phone signals is, let's first understand how mobile communication works. As a mobile communication device, a mobile phone needs to establish a connection with a nearby base station first, and then access the core network to find a communication destination. In the above process, all information is carried and transmitted by electromagnetic waves. The electromagnetic wave frequency band used by the mobile phone is related to the mobile phone model and operator. If you want to block the mobile phone signals in the test room, it is impossible to make the base stations near the test room not working, otherwise all the communication equipment in this area will not be able to communicate normally. But in general, the electromagnetic wave frequency band used by the operator is distributed in the range of 850MHz to 5800MHz, so it only needs to shield the signal of this frequency in the examination room to achieve the purpose. At this time, only a small test room signal jammer is needed to perfectly solve all mobile phone signals in the test room.
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