For more than 10 million students and their parents and family members, the fairness and justice of each examination process is very worthy of attention. For example, possible cheating must be strictly prohibited, otherwise it will harm the interests of children who normally take the test.
Speaking of cheating, these days, copying cheat sheets, taking notes, and secretly writing formulas on the body are too old-fashioned. Over the years, cheating with electronic instruments using wireless signals has become a major issue affecting the fairness of examination rooms.
Therefore, in order to ensure a good order in the examination room, so that students can only rely on their own learning ability to determine the scores of the college entrance examination, the mobile phone signal shielding device in the examination room has become a standard product for major examinations.
The current mainstream cell phone jammer can shield 2G, 3G, 4G, WiFi signals, and the frequency band covers 800-2600MH, which can basically shield electronic instruments from cheating in these frequency bands. Enhanced products can also shield low frequency bands, such as walkie-talkie signals will be interfered.
There are two types of mobile phone signal jammers in the examination room: built-in antennas and external antennas, each with its own characteristics and slightly different ease of use, but both can achieve better shielding effects.
In addition, since many schools have installed base stations from the three major communications companies in their teaching areas, the signal strength will be relatively high, and a simple mobile phone signal shielding device may not be able to shield them completely. At this time, China Telecom, China Mobile, and China Unicom generally cooperate with the college entrance examination and reduce the transmission strength of signal base stations during the examination period.
In short, everything is to ensure the order of the examination room and to allow students to participate in this important examination fairly and fairly, which can determine the destiny of future life to a certain extent.