A brief description of the working principle of a signal jammer
When the signal jammer is in operation, it scans the forward channel at a specific speed within the range from low frequency to high frequency. This scanning speed will cause interference when the mobile phone receives message signals, making it unable to correctly interpret the normal data sent by the base station and thus unable to establish a connection with the base station. Therefore, the mobile phone will display states such as searching for the network, no signal, and no service system, thereby achieving the purpose of blocking the mobile phone signal.
It is worth noting that the interference power of the signal jammer is constant, while the shielding radius is jointly affected by path attenuation and the signal level of the receiving base station. To achieve interference with mobile networks, it is necessary to ensure that the signal field strength emitted by the jammer exceeds the mobile signal field strength in the area where the interference is being implemented. In addition, the closer the interference site is to the base station, the stronger the field strength will be, and the smaller the effective interference area will be. Conversely, the farther the distance, the weaker the field strength, and the larger the effective interference area.
In conclusion, within a certain range of transmission power, the interference range mainly depends on the field strength in the interference area. Regardless of the power of the signal jammer, once its transmission power is determined, as the distance increases, the intensity of the interfering signal will gradually weaken until it loses its interference capability.
Meanwhile, the mobile phone signal jammer can effectively block 2, 3, 4, and 5G mobile phone signals as well as 2.4G and 5.8G Internet signals. It shields a wide range of frequency bands, including CDMA, GSM, DCS/4G, 3G(China Unicom/China Telecom), China Mobile 3G, WIFI, etc. After using a mobile phone signal jammer, although the mobile phone may show a signal, it is actually impossible to make and receive calls or access the Internet, thus ensuring the confidentiality of communication in places such as examination rooms and meeting rooms. After turning off the jammer when necessary, the mobile phone can be used normally again. In addition, mobile phone signal jammers will not cause interference to other electronic devices.
Common application sites of signal jammers
Including examination rooms, meeting rooms and other places that need to be kept confidential.
1. All kinds of large, medium and small examinations: Fairness is the cornerstone of social development. On our path of growth, exams are like indispensable Bridges, connecting every important stage. Whether it is the academic assessment for the transition from primary school to junior high school, or major examinations such as the college entrance examination and civil service recruitment, a fair and serious examination environment is needed. To ensure the fairness of examinations, mobile phone signal jammers and other devices are widely used in various large, medium and small examinations. They can comprehensively block data signals in the examination room, preventing mobile phones from communicating and thus effectively preventing cheating by examinees.
2. Government agency and enterprise meetings: Within government agencies and enterprises, meetings are often held to discuss major decisions, announce important decisions, and even involve confidential content. In these meetings, any private phone call or message may disrupt the order of the meeting, interfere with the decision-making process, and even involve serious issues such as information leakage. To ensure the smooth progress of the meeting, the use of signal jammers has become a necessary measure. At the same time, the shielding device in the meeting room should be kept in a silent state when in operation to avoid the noise it emits from interfering with the meeting atmosphere.
3. Sensitive areas such as key national defense sites, prisons, and courts: These regions have extremely strict requirements for confidentiality. In key national defense areas, the leakage of any communication equipment may endanger national security. In prisons and courts, strict communication supervision is aimed at maintaining the fairness and seriousness of the law. According to relevant regulations, prisoners in prisons are strictly prohibited from using mobile phones and other electronic devices at will to communicate with the outside world, in order to prevent them from colluding or creating security hazards through communication tools. Therefore, the use of high-power mobile phone jammers in these areas has become an indispensable security measure. At the same time, to further ensure the fairness and independence of the trial, courts usually equip mobile phone jammers to maintain the seriousness of the courtroom and the smooth progress of the trial.
