Precautions for the use of mobile phone signal blocker
With the popularization of mobile phones, the demand for mobile phone signal shielding devices has greatly increased in various meetings and examinations, so there is naturally a broad market for mobile phone signal shielding. However, most users lack sufficient knowledge of mobile phone signal jammers. In order to achieve better results, one-sided selection of high-power jammers will bring many hidden dangers.
The principle of the mobile phone signal jammer is to use broadband to send interference signals to interfere with the uplink signal of the mobile phone to achieve the effect of shielding the work of the mobile phone. Therefore, this itself is the birthplace of the signal. As a signal source, there will naturally be radiation. According to the requirements of use, the transmitting power of the existing shielding device ranges from 1W to 480W. How big is this transmission power? In comparison, the larger transmission power of GSM mobile phones is 2W, and the GSM macro base station is generally 20W to 40W. The shielded emission power for general examinations and conferences is between 10W and 60W.
Generally speaking, for general tests and small meetings, selecting a mobile phone shield with a transmission power of 2W-10W can achieve good results. However, from our survey of large schools and important meeting places, many places often unilaterally pursue high-power shielding. For example, in a school with more than 20 classrooms, shielding devices are installed in each classroom, and 30W transmission power is selected. In addition, after the exam, due to lack of attention to use, there are often a small number of screens that are not turned off in time and are sent out for several weeks. Especially in an elementary school, after the exam, the monitor has not been turned off for two consecutive weeks. Before we found that place, we found that the screen had been turned on and sat on the students' podium! It makes us all sweat!
Therefore, I strongly appeal to all those who need to use mobile phone signal jammer devices:
1. Don't blindly choose high-power shielding. For classrooms, choosing 2W transmit power shield is sufficient to achieve shielding effect.
2. After use, be sure to close the shield in time to avoid continuous radiation.
3. Be sure to choose shielding materials produced by regular manufacturers. Shields produced by informal manufacturers are often in pursuit of good shielding effects to obtain better shielding effects.
