dojammer signal blocker

  Signal jammers , as a device that can interfere with and block wireless communication signals in a specific frequency band, have been widely used in many fields in recent years. It is like a double-edged sword, playing a positive role in ensuring communication security and maintaining order in the examination room, but it also brings potential communication interference and legal risks. In the examination environment, signal jammers have become a powerful assistant to prevent cheating. By blocking the signals of wireless communication devices such as mobile phones, it effectively curbs the behavior of candidates using high-tech means to cheat, and maintains the fairness and impartiality of the examination. In addition, in sensitive places such as military and government, signal jammers are also used to prevent illegal eavesdropping and signal interference, and ensure the safe transmission of important information. However, the use of signal jammers is not without controversy. On ...

 Every year, there will be a listening test in the CET-4 and CET-6 exams. Before the exam, the examination room will turn on the  cell phone signal jammer  to interfere with the mobile phone signal in the examination room to prevent candidates from cheating in the exam using communication tools. Many schools reported that after turning on the mobile phone signal jammer, there was a certain degree of interference to the campus radio. The radio signal interference in some areas was serious. After turning off the mobile phone signal jammer, the interference disappeared. Let's talk about the reasons for this situation and how to solve it. First of all, campus radio is a kind of low-power FM radio. Many colleges, middle schools and even schools have now adopted campus FM radio to broadcast English programs or other programs. The frequency range is usually between 76-88MHz. The signal emitted by the mobile phone signal jammer is a white noise interference signal with the same f...