With the popularity of mobile phones, the demand for cell phone signal jammers in various conferences, exams, etc. has greatly increased. Therefore, mobile phone signal jammers naturally have a broad market. However, most users lack sufficient knowledge about 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 blocking the work of the mobile phone. So that in itself is where the signal originates. As a signal source, there will naturally be radiation. According to the usage requirements, the transmit power of existing signal jammers for sale ranges from 1W to 480W. How much power does this transmit? In comparison, the maximum transmit power of GSM mobile phones is 2W, and the maximum transmit power of GSM macro base stations is generally 20W to 40W. The shielded transmission power for ordinary examinations and conferences is between 10W and 60W.
Generally speaking, for general tests and small meetings, choosing a mobile phone shield with a transmission power of 2W-10W can achieve good results. However, judging from our surveys of large schools and important conference venues, many places tend to pursue high-power shielding unilaterally. For example, in a school with more than 20 classrooms, each classroom is equipped with a shielding device and a transmit power of 30W is selected. In addition, after the exam, due to the lack of attention to use, there are often a small number of screens that are not turned off in time and are issued for several weeks. Especially in one elementary school, after the exam, the monitor was left on for two weeks. Before we found the place, we found the screen turned on and sitting on the podium with students! It makes us all sweat!
Therefore, I strongly urge everyone who needs to use a cell phone signal jammer device to:
1. Don’t blindly choose high-power shielding. For classrooms, choosing 2W transmit power shielding is enough to achieve the shielding effect.
2. After use, be sure to turn off the shield in time to avoid continuous radiation.
3. Be sure to choose shielding materials produced by regular manufacturers. The shielding produced by informal manufacturers is often aimed at pursuing good shielding effects and obtaining better shielding effects.