Are signal jammers dangerous?
When the mobile phone is working, it is within a certain frequency range. The mobile phone and the base station are connected by radio waves to complete the transmission of data and sound with a certain baud rate and modulation method. According to this communication principle, the mobile phone signal jammer scans from the low-end frequency of the forward channel to the high-end frequency at a certain speed during the working process. The scanning speed can cause garbled interference in the message signal received by the mobile phone, and the mobile phone cannot detect the normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station. The mobile phone manifests as the phenomenon of searching the network, no signal, no service system, etc.
The common cell phone signal jammers on the market have the following frequencies: 869~894MHz; 825~960MHz; 1805~1880MHz and 1900~1990MHz, etc. The working frequency bands are CDMA800, GSM900, DCS1800, and PCS1900. It can control the range of about 40 meters in diameter, using DC-DC converter input voltage, 5V output voltage.
How to use the signal jammer
1. Select the area where you want to cut off the cell phone signal, and place the cutter on the table or wall in this area.
2. After the installation is complete, turn on the power of the disconnector and turn on the power switch.
3. After the device is connected, press the power switch disconnector to work. At this time, all the mobile phones on the site are in the state of searching for the network and lose the base station signal. Neither the calling party nor the called party can establish a call connection.
The emergence of "mobile phone signal jammer" has played a certain role in suppressing the increasingly serious "mobile phone noise pollution". However, as a mobile communication interference device, whether the electromagnetic radiation generated will cause harm to human health has also become a problem for people. At the same time, during the installation and use of mobile phone shielding equipment, due to the greater autonomy and randomness in terms of the number of installed units, transmission power, coverage methods, radiation control, etc., some places are demanding effective interference and The shielding effect is maximized, and even the blind introduction of high-power mobile phones interferes with the installation and use of shielding equipment. The impact and harm on the human body cannot but be worrying.
As another kind of human product "mobile phone signal blocker", it will definitely bring certain negative effects while shielding mobile phone signals and ensuring information security. However, when we look at the problem, we should see the main contradiction. Just as we didn't stop using kitchen knives because they would cut our hands when cutting vegetables, we also wouldn't reject "mobile phone signal jammers" because "mobile phone information jammers" may cause bad radiation to the human body. After all, the "mobile phone jammer" guarantees information security and contributes to social stability is its main credit. Most importantly, it brings security to places with high security factors such as prisons, detention centers, and major meetings.
As far as a qualified mobile phone signal shielding system is concerned, according to the current level of scientific understanding, there is no security problem. The reason for this is mainly for the following two reasons:
First, from a technical point of view, although the mobile phone signal shielding system is a new technology product, it should be said that it has developed relatively mature in terms of technology, so it has high security. According to the test report of the authoritative testing agency, the qualified mobile phone signal shielding system has low radiation, and because it is usually installed at a high place, it has no adverse effect on human health.
Second, from a practical point of view, many authoritative units in China have begun to use mobile phone signal shielding systems. For example, in 2004, in order to maintain the solemn atmosphere of the memorial hall and meet its special confidentiality requirements, the Administration of Chairman Mao Memorial Hall installed a mobile phone signal shielding system produced by Shanghai Jike Electronics Co., Ltd. in the memorial hall, which has been used and tested in practice. , the Memorial Hall Administration believes that the products produced by Jike Company meet its requirements in all aspects, including safety and aesthetics. I think this should be a very convincing case. In addition, according to the information collected by the author, the products produced by Shanghai Jike Electronics Co., Ltd., a leader in the mobile phone signal shielding system industry, are used in prisons of the judicial department and detention centers of the public security department. It has been used in all cases, and the feedback after use is believed to be an immortal evidence.
It is very interesting that the mobile phone, the "enemy" of the mobile phone signal blocking system, also caused controversy about security at the beginning of its introduction, but as people gradually understood the matter of mobile phones, people finally accepted mobile phones, and In less than a decade, mobile phones have become an indispensable necessity in our lives, and even the popularity of mobile phones has spawned a new generation: the thumb generation, the popularity of mobile phones is evident. In the history of human cognition, the development of one aspect of contradictory things can predict the prospects of another aspect. Such examples are not uncommon. I think the development of mobile phones as the "enemy" of mobile phone signal shielding systems may be It can provide a blueprint for us to predict the industry picture of mobile phone signal blocking system.
Finally, I would like to tell a true story: in the 1990s, when my country built the Daya Bay Nuclear Power Station in Guangzhou, Hong Kong citizens used to be very resistant to this project because of the safety of nuclear power. Jokingly said: kitchen knives also have problems with safety. Kitchen knives will inadvertently cut fingers and even be used as weapons by wicked people, but this does not prevent us from using kitchen knives, and does not prevent China from becoming a great food country, because as long as we work hard and do our best, we will can prevent these things from happening. This very superb joke greatly eased the Hong Kong people's resistance to the Daya Bay Nuclear Power Plant at that time, and made a small contribution to the smooth start of the nuclear power project.
It goes without saying that technology is a double-edged sword. We all know that mobile phone signal jammers have a certain amount of radiation. In the current situation where there is no authoritative definition of how harmful this radiation is to people, what we should do is to try our best to start from a people-oriented perspective and make good use of technology. Advantages, control and reduce the disadvantages of technology, on the premise of ensuring people's safety and health, to decide whether to widely use in daily life, not for the uncivilized behavior of a small number of people, ignoring or even affecting the interests of the majority of people .