Everyone is not unfamiliar with cell phone signal jammers. During the middle and high school exams, they were already familiar with this. The school placed the jammer in the classroom to prevent students from using their mobile phones to search for answers on the Internet during the exam. How does it work? Let's take a look. "The mobile phone jammer scans from the low-end frequency of the forward channel to the high-end at a certain speed during operation. This scanning speed can cause garbled interference in the message signal received by the mobile phone. The mobile phone cannot detect the normal data sent from the base station. The mobile phone cannot establish a connection with the base station. The mobile phone is manifested as a search network, no signal from the mobile phone, no service system, etc.
Purchasing cell phone signal jammers is mainly to prevent cheating in exams. It is understood that the main purpose of the Office of Academic Affairs to purchase signal jammers is to prevent students from cheating in exams. Many students use mobile phones to cheat during exams. In order to prevent this phenomenon from happening again and to ensure that the examination is held fairly and impartially, the school purchased a cell phone signal jammer. The Academic Affairs Office made such a decision because of the existence of cheating on exams. The cell phone jammer shields not only the signal, but also the trust between students and teachers.
Before each exam, the "Code of Candidates" will be read out on the radio, and there are three orders and five applications that "candidates are prohibited from cheating." What is the purpose of the exam? It is to detect the learning results during this period of time. Cheating in the exam room may get a good result, but this is an act that is extremely irresponsible to oneself. Nothing you get from cheating is yours. There are no shortcuts to success. Only by relying on your own efforts can you gain something. Everyone has a fluke, the difference is how to control it.
For example, when many people were in elementary school, their minds were still immature. In order to get good grades, they secretly read the exam papers at the same table or secretly flipped through the books to get good grades. But as we grow older, when we go to middle school or university, we will consciously resist this behavior and control our own fluke. Most people still hope to achieve real results through their own efforts and use this to find out. Fill up the vacancy and make up in the next study and life. Luckily, to a certain extent, we can have a relaxed life. Take the exam as an example. Knowledge points that have been memorized hard may not be tested. As long as you find this knowledge point and copy it during the exam, you can relax. Achieving good results, once relying on this kind of psychology will lead to catastrophe, once you get used to this kind of "live and live" life, then you can "live and live" everything in your life.
So how does the signal jammer block the signal? The current mobile phone signal jammers are all full frequency bands. It can shield all the 2G 3G 4G signals, 2.4G WIFI signals and Bluetooth signals under all the three operators of China Mobile, China Unicom and Telecom. Its principle is sent by itself. The frequency interferes with the mobile phone receiving the frequency sent by the base station and the wireless router, so as to achieve the purpose of shielding them.