What should I do if the mobile phone signal jammer is not effective in English exams?
Recently, at the request of college users, we conducted on-site field surveys and conducted on-site interference range tests. After testing, the interference effect of the mobile phone signal blocker on China Telecom and China Unicom on site can meet the signal interference of the entire classroom, but the interference range for mobile phones is very small, only two or three meters.
During the period, the technicians carried professional instruments to test and found that a large number of indoor signal distribution antennas were installed in the ceiling of the corridor of the teaching building. After testing, it was found that the indoor signal distribution system was indeed installed in a mobile manner. This is the reason why the mobile phone signal jammer has a poor interference effect on mobile phones in the classroom.
At present, domestic operators will configure base stations and indoor signal amplifiers on the campus of colleges and universities. This is because the capacity of each base station and indoor signal amplifier is very limited, and there are many teachers, students and staff in colleges and universities, so base stations and indoor signal amplifiers must be configured on campus. Everyone knows that the size of the interference range of the mobile phone signal jammer is closely related to the distance from the base station and whether the indoor signal amplifier is installed in the teaching building.
Solution:
1. After confirmation, if there are indeed base stations and indoor signal amplifiers on campus, the school can contact the operators of the base stations and indoor signal amplifiers to negotiate to turn off the power of the base stations and indoor signal amplifiers on campus during the hours when the school holds the CET-4 and CET-6 exams, so that the mobile phone signal strength in the teaching building is reduced, thereby improving the interference effect of the mobile phone signal jammer, and restore the normal operation of the base station and indoor signal amplifier after the exam.
2. Through professional on-site testing, detect the frequency band that the low-power mobile phone jammer cannot cover, and then select the high-power interference module of the corresponding frequency band for targeted interference. This approach will increase the cost compared to the first method, and the operation is more professional, and it is also necessary to consider whether the school is willing to increase the cost.
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