Ensuring Optimal Performance and Mitigating Potential Interference
In recent years, with the widespread implementation and construction of standardized examination halls, full-band signal blockers have become essential technological safeguards. These blockers are now installed permanently in each examination classroom, eliminating the need for temporary distribution and subsequent collection during exam periods. However, once full-band signal blockers are installed in examination halls, what are the key considerations? Examination halls consist of several classrooms specifically designed for exams, and the typical installation positions for full-band signal blockers within these classrooms include above the front blackboard, on the sides of the blackboard, on the sides of the back blackboard, and on the relatively central position of one side wall. Regardless of the chosen installation position, there are several important considerations to keep in mind.
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Firstly, the installation height should ideally exceed the height of a person’s raised arm, specifically no lower than 2 meters. There are two reasons for this. Firstly, it ensures that the emitted signal from the full-band signal blocker can propagate throughout the classroom without encountering any obstructions, providing comprehensive coverage. Secondly, it helps prevent intentional interference or damage to the signal blocker.
Secondly, the power supply line for the signal blocker should adhere to standard electrical work standards. It is necessary to install protective conduit for the power supply line. Randomly connecting a power supply line is strongly discouraged. The connection point of the power supply line should be properly insulated and protected.
Thirdly, in classrooms equipped with full-band signal blockers and digital multimedia teaching devices, especially those that use wireless mice during computer-based instruction, it is recommended to replace wireless mice with wired ones. This is because most current mobile signal blockers also have the capability to block wireless Wi-Fi and Bluetooth signals. If a wireless mouse is used during an exam, the signal blocking effect may prevent normal mouse operation.
Lastly, examination halls generally have microphones and speakers installed. When selecting the installation position for full-band signal blockers, it is important to maximize the distance between the blockers and the microphones and speakers. This is because once the mobile signal blocker is activated, there may be electromagnetic radiation within a range of one to two meters around its transmitting antenna, which could potentially negatively affect the normal operation of the aforementioned devices.
In conclusion, the installation of full-band signal blockers in examination halls requires careful consideration to ensure optimal performance and mitigate potential interference. By adhering to the recommended installation height, using standard electrical work practices, replacing wireless mice with wired ones, and maintaining a safe distance from microphones and speakers, examination halls can effectively create a controlled and secure testing environment.