Looking at ancient and modern Chinese and foreign countries, all exams in the past dynasties have cheated, but with the improvement of skills, the methods and methods of cheating are constantly updated and changed. Nowadays, with the development of science and technology, more and more people use mobile phones to cheat, which has become an issue that the examination management department pays more and more attention to. Mobile phone signal jammers are currently an active preventive measure in major examination rooms.
Mobile phones have indeed brought convenience to people's lives, but a lot of inconveniences have gradually appeared along with the inseparability of mobile phones. Schools do not allow cheating in exams. With the advent of mobile phones, students began to learn to cheat with mobile phones, but what if they cannot completely eliminate the existence of mobile phones? Gas stations are also places where mobile phones are not allowed, and safety accidents may occur, but what should I do if customers cannot be completely restricted? What should I do if the ringtones of my mobile phone are the most taboo when conducting a conference or a forum lecture, and I cannot confiscate them all? It can be seen that mobile phones are not only beneficial, but also add a lot of troubles to people's lives. At this time, I need a machine that can block mobile phone signals, that is, a mobile phone signal blocker.
The special "mobile phone signal jammer" for the examination room is a high-tech product that can actively prevent the occurrence of cheating cases in the examination room. The working principle of the special-purpose mobile phone signal jammer currently on the market is as follows: when the machine is working, a spherical invisible electric fence with a diameter of about 40 meters is formed around it. The mobile phone signal is in a vacuum state, that is, the mobile phone cannot receive external signals, nor can it send signals to the outside. At this time, all the mobile phones placed in the electric fence are in a malfunctioning state, and the prompt tone of the mobile phone when dialing from an external phone is "·Temporarily unable to connect.
The shielding frequency of the mobile phone signal jammer for the examination room is: (1) 869 - 894 MHz (2) 925 - 960 MHz
(3) 1780 - 1920 MHz (4) 2010 - 2145 MHz (5) 2300 - 2485 MHz
(6)2515-2675MHz (7)3400-3600MHz (8)4800-4900MHz
Its working frequency bands are: CDMA800, GSM900, SCDMA1800, DCS1800, PHS1900, TD-SCDMA (Mobile 3G), CDMA2000 (Telecom 3G), WCDMA (Unicom 3G), 4G, 5G, 2.4G (WIFI), 5.8G (WIFI)
Its characteristic is that it only shields all kinds of mobile phone signals and does not affect any electronic equipment. In particular, it will not affect the radio of the English listening test.
Comparison of the Application of "Special Cell Phone Signal Jammer for Examination Room" and Other Preventive Measures in Examination Room
1. "Mobile phone signal jammer" is an active preventive measure: "Other preventive measures" are passive preventive measures.
2. "Mobile phone signal jammer" can actively control all mobile phones entering the examination room and make them unable to use normally: "Other preventive measures" only monitor the usage of mobile phones.
3. "Mobile phone signal jammer" is to force cheaters to stop: "Other preventive measures" is to catch cheaters on the spot.