The backpack-type frequency jammer adopts a backpack-type design, which is easy to carry and flexible in application, and is especially suitable for emergency, transition, temporary control and other needs;
Generally used in large and medium-sized examinations, the common security equipment in the examination room can effectively prevent candidates from cheating through communication equipment such as mobile phones and walkie-talkies. Therefore, many school test centers will use frequency jammer to maintain the order of the test room and ensure the fairness of the test room.
When the mobile phone works, it exchanges information with the base station within a certain frequency range to realize the normal use of the mobile phone. According to this communication principle, the backpack frequency jammer scans from the low-end frequency of the forward channel to the high-end frequency at a certain speed during the working process. In the process of communication between the mobile phone and the base station, due to the interference caused by the signal emitted by the frequency jammer, the mobile phone cannot establish a connection with the base station. The mobile phone appears to be out of service.
Backpack frequency jammer is also called wireless signal jammer. As the name suggests, it is a special instrument for shielding (that is, interference) for wireless signals. According to its working principle, the signal shielded (interfered) by the frequency jammer is both a wireless signal, and the transmission signal in the air that cannot be seen or touched. This can also indicate its principle characteristics, that is, shielding (interference) for wireless signals of some specific operating frequencies or frequency bands. The signal transmission of wired network is through wired connection, such as common wired network (network cable), cable TV, wired telephone and so on. The stub of signal transmission is the cable. Therefore, when the backpack frequency jammer is working normally, it will not cause signal interference to the wired network. In other words, the frequency jammer cannot shield the desktop computer that uses the wired network.