Most people now have mobile phones. Although mobile phones bring various conveniences, some of its functions also cause some people to abuse some of its advantages. For example, some students use mobile phones to cheat. Signal blockers can block signals and prevent signal transmission, which is of great significance in preventing cheating. Many examination rooms have begun to use it. Many people also want to know what some of its principles are?
1. During the working process, scan from the low-end frequency of the forward channel to the high-end frequency at a certain speed. The scanning speed can cause garbled interference in the message signals received by the mobile phone. The mobile phone cannot detect the normal data sent from the base station, making it impossible for the mobile phone to establish a connection with the base station, thereby blocking the mobile phone signal.
2. Use the frequency emitted by itself to interfere with the frequency emitted by the mobile phone receiving base station and wireless router, thereby achieving the purpose of blocking them.
3. Within a certain frequency range, mobile phones and base stations are connected through radio waves, and data and sound transmission are completed with a certain baud rate and modulation method. During the working process, it scans from the low-end frequency of the forward channel to the high-end frequency at a certain speed.
4. The functional characteristics of electromagnetic waves are determined by its frequency. The mobile phone must emit electromagnetic waves that meet the requirements before it can connect to the communication operator's base station. The jammer emits the same radio frequency as the mobile phone. Because the frequency is the same, the mobile phone cannot distinguish which signal is the normal base station signal, completing "interference". In a loop, the interference bands corresponding to the three signals are repeatedly played, covering the three bands at once. Moreover, the distance of this loop is small, resulting in the mobile phone having basically no chance to speak.
Therefore, the signal jammer for cell phone has the function of blocking signals and plays a certain interference role. This is of great significance to prevent students from cheating. If you need to use your mobile phone in some emergency, don't get too close to it, otherwise the mobile phone signal will be interfered and the mobile phone will not be able to be used normally, which will be very delayed. Don’t get too close to other electronic devices during normal use.