How to arrange the network jammer when the signal on the shielding site is too strong
Recently, a customer asked about the need to configure network jammers for the examination hall project, but there are many base stations nearby the examination hall. There are eight base stations distributed within a radius of 300 meters. How to arrange network jammers on this site.
The reason why the network jammer can interfere with the mobile phone signal is that the signal transmitted by the shield is in the same frequency band as the mobile phone signal transmitted by the base station. The signal transmitted by the base station provides services for the mobile phone, while the signal transmitted by the jammer is white noise signal, which can also be called interference signal. Within the coverage of the jammer, the mobile phone signal strength is not as strong as the interference signal, and the mobile phone cannot recognize the signal of the base station, As a result, the mobile phone can't connect to the base station, and can't get the service of the base station. The mobile phone will display the status of no signal or restricted service. Then there are 8 base stations distributed within a radius of 300 meters around the examination hall, and the straight-line distance from individual base stations to the examination hall is within 100 meters. In this case, it can basically be determined that the examination hall cannot interfere with mobile phone signals through normal channels. The base station is too close. The signal from the base station to the examination room is very strong. The low-power network jammer is basically ineffective in this scene. Even if high-power network jammers are used, the interference range is limited, and it is unlikely to configure too many high-power machines. After all, the higher the transmission power, the higher the cost of the equipment.
In this case, there is still a way to achieve the interference of mobile phone signals on the spot. You can coordinate with the operator to adjust the transmission power of the base station, or adjust the direction of the antenna on the base station so that the main lobe of the antenna does not face the examination room. This approach is to reduce the signal strength in the examination room, so as to play the real role of the network jammer. Under normal circumstances, the processing can only be coordinated from the perspective of the base station. If it is during the middle school and college entrance examination, it is generally not necessary to spend too much effort in this case, because during the middle school and college entrance examination, all relevant departments will work together, and operators will also participate. At this time, the base stations around the examination hall will basically be adjusted. At this time, the use of network jammers can meet the purpose of jamming mobile phone signals.
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