In theory, the cell phone signal jammer does not interfere with the campus broadcasting system.
The starting frequency of the signal emitted by the mobile phone wifi jammer is a white noise signal above 800MHz, while the signal used by the campus broadcasting system is from 72MHz to 108MHz. It can be found that the signal frequency emitted by the cell phone jammer is the same as the signal emitted by the campus broadcasting system. The frequency does not repeat the frequency band, so theoretically there is no interference between the two.
So after testing, some schools have installed cell phone signal jammers. When the jammers are turned on, the campus radio has interference in some areas of the classroom. What is the cause? This may be because this classroom is far away from the campus broadcast antenna, and the broadcast signal propagates to this classroom, and the signal is attenuated. The broadcast signal was overwhelmed, so it caused interference to the campus broadcast system.
How to solve this interference problem can be solved from two aspects. First, adjust the frequency of the campus broadcast signal. After the adjustment, test the classrooms with interference until there is no interference. Second, you can shield the mobile phone signal. Adjust the installation position of the device to a position that does not interfere with the campus broadcasting system.