Recently, at the request of university users, on-site investigation was carried out, and on-site interference range detection was carried out. After testing, the interference effect of the mobile phone jammer on telecommunications and China Unicom 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 inspection by technicians with professional equipment, it was found that a large number of antennas for indoor signal distribution were installed in the ceiling of the corridor of the teaching building, and after inspection, it was found that the indoor signal distribution system was indeed installed by mobile, which caused the interference of mobile phones. The reason why the device does not interfere with the mobile phone in the classroom is not good.
At present, domestic operators will configure base stations and indoor signal amplification on campuses of colleges and universities. This is because the capacity of each base station and indoor signal amplification is very limited, and there are many teachers, students and faculty members in colleges and universities, so they must be on campus. Configure the base station and indoor signal amplification. Everyone knows that the size of the interference range of the mobile phone signal jammer is closely related to the distance of the base station and whether indoor signal amplification is installed in the teaching building.
1. After confirmation, there are base stations and indoor signal amplification on the campus, then the school can come forward to contact the operators of the base station and indoor signal amplification, and negotiate within a few hours during the school's CET-4 and CET-6 test. The power of the base station and indoor signal amplification is turned off, so that the signal strength of the mobile phone in the teaching building is reduced, so that the interference effect of the mobile phone jammer is improved, and the normal operation of the base station and indoor signal amplification will be restored after the test is over.
2. Through professional on-site inspection, detect the frequency band that the low-power mobile phone jammer cannot cover, and then select the high-power jamming module of the corresponding band to interfere in a targeted manner. Compared with the first method, the cost of this approach will increase, and the operation is more professional, and it should also take into account whether the school is willing to increase the cost.