What problems might you encounter with the intelligent shield used in the examination room?
Today, let's talk about why the intelligent shielding device installed in the college entrance examination room can still send information?
First of all, let's understand the working principle of the shielding instrument. The basic principle of the shielding instrument is to achieve interference and shielding of wireless communication signals by transmitting interference signals of the same frequency. The mobile phone cannot detect the normal data sent by the base station, so it cannot connect to the base station. This involves the frequency band and transmission power of wireless communication signals. To achieve signal shielding, you must transmit strong enough signal interference in the same frequency band, or the effect cannot be guaranteed. If the smart blocker is correctly placed and installed as required, it still cannot block all mobile phone signals. The main problems are as follows.
① There is interference from the nearby communication base station. When the intelligent shield is used near the communication base station, the problem of indirect shielding or the problem that a certain frequency band cannot be shielded will occur.
② There are signal amplifiers in the area where the intelligent shield is used. In some cases, users will install mobile phone signal amplifiers to improve communication quality, but this will also directly affect the shielding effect of the shield.
① If there is no interference source such as base station and signal amplifier near the place where the intelligent shield is used, and the shield still cannot be completely shielded, it should be that there is a problem with the shield itself. Of course, the shield has been debugged by technicians before leaving the factory, and it will be shipped only after all checks are made to ensure that there is no problem. However, there are some uncertain factors during transportation, which may lead to collision or other impacts on the shield.
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