With the popularity of mobile phones, the demand for cell phone signal blockers in various conferences, exams, etc. has also greatly increased. Therefore, mobile phone signal jammers naturally have a broad market. However, most users do not know enough about mobile phone signal jammers, and often choose high-power shielding in order to achieve good results, which has many hidden dangers.
The principle of the mobile phone signal jammer is to transmit interference signals through broadband to interfere with the uplink signal of the mobile phone, thereby shielding the work of the mobile phone. So this is a signal transmitter in itself. As a signal transmitter, radiation is naturally generated. According to the needs of use, the current shielded transmission power ranges from 1W to 480W. How big is this transmission power? In comparison, the maximum transmit power of GSM mobile phones is 2W, while the maximum transmit power of GSM macro base stations is 20W to 40W. In addition, the shielded transmit power is generally between 10 and 60W and is used for testing and conferences.
Generally speaking, for general examinations and small meetings, choosing a signal jammer for sale with a transmission power of 2W-10W can achieve good results. However, a survey of major schools and important conference venues shows that many places are pursuing high-power shielding one-sidedly. For example, in a school with more than 20 classrooms, each classroom has a shield and selects a 30W transmit power. After the inspection, due to lack of attention to use, it often happened that a small amount of shielding was not closed in time, and the emission continued for several weeks. Especially in an elementary school, after passing a test, the results have been failing for two consecutive weeks.
Therefore, I hereby strongly appeal to all units that use mobile phones to block signals:
1. Don’t blindly choose high-power shielding. In a classroom, choosing shielding with a transmit power of 2W is enough to achieve the shielding effect.
2. After use, the shielding must be turned off in time to avoid continuous radiation.
3. Be sure to choose a protective cover produced by a regular manufacturer. The shielding produced by informal manufacturers often pursues good shielding effect in pursuit of good shielding effect.