Portable jammer those knowledge points you don't know
With the popularity of mobile phones, the demand for portable jammers in various classified conferences, standardized examinations, prisons, detention centers, etc. has also greatly increased, so jammers naturally have a broad market. However, most users do not know enough about jammers. They often choose high-power jamming unilaterally in order to achieve good results. There are many hidden dangers.
The principle of portable jammer is to transmit interference signals through broadband to interfere with the downlink signals of mobile phones, which makes the mobile phones unable to be used normally. This itself is a signal transmitter, which naturally produces radiation. At present, the interference transmission power ranges from 1W to 100W, compared with 2W for GSM mobile phones and 20W to 40W for GSM macro base stations.
Generally speaking, for general examinations and small meetings, the jammer with 2w-10w transmission power can achieve good results. However, from the survey of major schools and important meeting places, many places unilaterally pursue high-power interference. For example, in a classroom with more than 20 classrooms, each classroom has an jammer, and 50W transmission power is selected. After the inspection, due to the neglect of use and the lack of intelligent unified management, a small amount of interference is often not closed in time and the continuous launch for several weeks. It will be in the range of high-power transmission for a long time. Therefore, I strongly appeal to all units using portable jammers:
(1) Do not blindly choose high-power interference. In a classroom, choosing a low-power jammer is enough to achieve the effect of interference.
(2) Shut down the jammer in time after use to avoid continuous radiation.
(3) Portable jammers produced by regular manufacturers must be selected. The quality is guaranteed, the technology is qualified, the products are complete, and the machines with different power are used in different places. There are relevant test reports, and the radiation is within the safe range.