2020 Julypage 4

To prevent students from playing with mobile phones

Nowadays, more and more students have smart phones. In order to prevent students from playing mobile phones at school to affect their studies, especially the phenomenon of playing mobile phones after going to bed at night and turning off the lights, Xin’anjiang Middle School recently installed several mobile phone signal jammer. This move caused objections from some students.

Student: I’m not used to the cell phone signal

On November 8, a netizen broke the news on Baidu Tieba of Xin’anjiang Middle School, saying that “I heard that mobile phone shielding devices are harmful to the body.” In the following days, there were several more posts about the school blocker, which triggered discussions among many netizens. Another netizen made up a poem: “I saw high-voltage lines during the day, high-tension lines at night, and high-tension lines every day…”, and nearly 30 comments were posted.

gps wifi cell phone jammers

On November 12, the reporter came to a certain class of the third year of the school and asked 4 boys, 3 of whom used smart phones and 1 used ordinary mobile phones. A boy told reporters that about half of the classmates in the class brought mobile phones, mainly for making calls. Nowadays, mobile phones have many functions. They also use mobile phones to watch TV shows, read news, read novels, and chat with friends. He complained to reporters: “The mobile phone has no signal and life is less interesting. I am really not used to it.”

In another class, the reporter learned that in addition to contacting family members when using mobile phones at school, girls also use their phones to shop on Taobao, check Weibo, and play WeChat. Some girls also use their smartphones to play with foreign social software such as Twitter, Facebook, and Instagram.

School: Schools should be responsible for the management of students, and mobile phones should be used reasonably at school

Principal Lai Zhonglin of Xin’anjiang Middle School said frankly that it is very common for students to bring mobile phones. Most of the mobile phones used by students are smart phones. They can play games, watch movies, go shopping, make friends and chat… The school clearly requires students to use mobile phones reasonably and is strictly prohibited in teaching. However, some students have poor self-control ability, especially after going to bed at night and turning off the lights, there are still students playing with mobile phones until late at night, which seriously affects the next day’s study, so that they start to doze off early the next day and lack sleep for a long time It will also affect your health.

In order to prevent students from using mobile phones at school to affect their studies, especially the phenomenon of using mobile phones after going to bed at night and turning off the lights, Xin’anjiang Middle School installed several mobile phone shielding devices. Lai Zhonglin said that the jamming device is mainly near the bedroom, and the activation time is a certain period of time, not all day, and the use time during the exam is slightly longer than usual. The shielding devices installed in the school are in compliance with the standards for the use of the college entrance examination and have safety guarantees. At the same time, the school also visited surrounding residents and units and asked the mobile company. The results showed that the shielding device did not affect the normal life of the surrounding area.

In response to the students’ messages in Tieba, School Lai also replied: Student mobile phone management is a problem that every school will encounter. The school hopes to get the attention and attention of relevant social departments and provide technical guidance. As a school, it should assume the responsibility of managing students. Students are asked to concentrate on their studies in school. Parents are also expected to understand, cooperate and support the school’s mobile phone management. Moreover, the school has a school messaging system that can meet the needs of students and parents. Contact demand.

Surrounding residents: no impact on normal life

On November 12, the reporter randomly interviewed several residents near Xin’anjiang Middle School. An employee of a company near the back door of the school said that the installation of the shielding device in the school did not affect the company’s employees’ mobile phone use and normal life. Mr. Wang, the owner of another small shop, also said that his mobile phone signal was not affected.

Interpretation of the principle of car jammer shielding remote control signal

The reporter learned from the car market that when many car owners use their cars, the theft of their valuables often occurs, and many car owners are puzzled. He obviously closed the door of the car, and the car was not damaged. How come the contents of your car were stolen? Could it be that your car was pried open by the master key? The netizen “Wind Chaser” found out the secret of the theft of car items after detailed research and search for a lot of information.

The netizen “Wind Chaser” told reporters that in fact, the biggest motivation for him to find out the reason is that the two bottles of Moutai in the Mercedes-Benz that he bought were somehow lost. Originally, these two bottles of Moutai were intended to be given to their own leaders. I hope to upgrade myself in the coming year. Moreover, these two bottles of Moutai are authentic, so once they are given to the leaders successfully, there is hope for the upgrade. I did not expect to be stolen. Losing the opportunity to give gifts to leaders made the netizen very depressed.

car gps anti track blocker

It is precisely based on this background that although the netizen also called the police, he could not provide evidence that he did put Moutai in his car and was stolen by someone else, because the car was intact and the case was not filed. What should I do? The netizen can only crack the secret by himself.

Later, the netizen learned about gps jammer and car decoders on the Internet, and finally solved the puzzle. The source of this secret is that the remote control information of the car was interfered by the car jammer, resulting in the car door being not locked at all, and then after the car owner left, those criminals who used the car jammer would have an opportunity to take advantage of it. So simple. In that case, is there any way to crack the illegal behavior of using car jammers?

Car decoder cracks car chip parameters to improve car safety

Many readers may think that since the car decoder can crack the parameters of the car chip, this is a huge challenge to the safety of the car itself. Why does it improve the safety of the car? For this, the netizen “wind chaser” himself has a deep understanding.

After knowing that gsm jammer can interfere with the car’s signal, for the majority of car owners, if they want to prevent the intrusion of car jammers, the direct method is definitely not feasible, and it is difficult to file a case after the products in the car are stolen. Only the dumb can eat coptis. The theft of car products reported on the Internet is actually a fiction when the police find out. How can our police have such a powerful ability?

handheld gps jammer

Therefore, the complete solution to car jammers is to provide car decoders to crack car chips. Then modify the parameters on the car chip to make the car jammer completely invalid. This method has been proved to be unsuccessful, and now many car repair 4S shops also provide such services. Because car decoders and car jammers are actually like the relationship between computer viruses and security workers, one develops viruses and the other prevents viruses.

After modifying the car chip through the car decoder, the netizen “Wind Chaser” has never lost any items since then. It can be seen that the car decoder can indeed improve the safety of the car. Professor Wang, an expert in the automotive industry, also talked about a point of view, that is, after the car decoder modifies the parameters of the car chip, the car jammer cannot read the data of the car chip, and there is no way to obtain the signal of the chip. It cannot interfere with the remote control function of the car.

This is like adding a protective cover to the car computer chip. The interference signal of the car jammer cannot attack the car chip through this protective cover, thus improving the safety of the car.

The anti-drone market has a bright future

Nowadays young people like to play with drones, because small drones can bring people unlimited fun, but some young people who have a shallow understanding of the law will use drones to spy on others’ privacy, thereby invading others Human rights. In order to be able to restrain and prohibit these young people from doing wrongdoing, the drone jammer was launched.

uav drone blocker

With the continuous progress of society and the increasingly moderate price of drones, more people will own drones in the future, so the intensity of the management of drones will increase, and it is inevitable that some people will not comply Laws, control drones flying everywhere. Or do not register the UAV to do some illegal things, then after the anti-drone system, these illegal things can be properly resolved, that is, interfere with the normal use of the UAV. Forcing the drone to land, thereby ensuring the safety of national airspace and the safety of social security.

In short, the prospects for the development of the anti-drone market are broad, so investors who want to invest may wish to get familiar with the rules as soon as possible to lay a solid foundation for future gains.

Principles of signal jammers in those examination rooms

In the annual college entrance examination and entrance examination, major operators will issue a warm reminder: In order to ensure the smooth flow of signals around the campus, the operators have arranged in advance for communication engineers to test the entrances and exits of each test center and the rest area of the parents accompanying the test, and conduct tests on nearby base stations. Software and hardware expansion to ensure the communication needs of parents in the test area during the test. Except that the signal is blocked during the exam, we have done our best to ensure that your communication is smooth. Every year in the college entrance examination, in order to prevent exam fraud, all communication signals in the examination room will be shielded. There are cell phone jammer in the exam room. Common signal jammers: At the same time, there is a radio monitor outside the exam room that can help fix those frequency bands that the mobile phone jammer can’t take care of. Electromagnetic wave signals, real-time monitoring of radio wave signals from unknown sources.

The working principle of the signal jammer used in the college entrance examination is to obliterate the useful electromagnetic wave signal in a large number of useless signals. Under normal circumstances, when we use a mobile phone, the mobile phone is first connected to the carrier’s base station, and the radio wave signals sent by the two parties come and go. However, when the jammer is turned on, gongs and drums will be beaten around the mobile phone, sending out a noise radio wave signal that is many times larger than the received base station signal power. The mobile phone can’t hear what the base station is talking about and cannot receive the base station’s signals normally. The connection was severed. Whether calling, texting, or other various functions, they are all in a paralyzed state.

jammer signal device Powerful

This is why the signal jammer affects the call and Internet access of mobile phone users around the examination room. The working principle of the jammer is as follows: in a certain frequency range, the mobile phone and the base station are connected by radio waves, and the data and sound transmission is completed with a certain baud rate and modulation method. Aiming at the above-mentioned communication principle, the jammer scans from the low end frequency of the forward channel to the high end 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 is manifested as a search network, no signal, no service system and other phenomena. Eventually, the mobile phone has no signal and cannot receive text messages or calls.

The current mobile phone signal jammer is full-band. It can shield all the 2G 3G 4G signals, 2.4G WIFI signals and Bluetooth signals under all the three operators of China Mobile, China Unicom and Telecom. Its principle is sent by itself. The frequency interferes with the mobile phone receiving the frequency from the base station and wireless router, so as to achieve the purpose of shielding them.

Prevent children from indulging in mobile phones-how to choose home mobile phone signal jammer

With the advent of summer vacation, primary and secondary schools all over the country began to have holidays, but the tests for parents have come one after another-what should I do if children are addicted to cell phone chat, what should they do if they don’t have a good rest and play mobile games in the middle of the night, children hold their phones all day and are indifferent to other things How to do? These are the questions I have received the most recently.

When encountering such consultations, I generally recommend parents to communicate with their children so that they can learn to self-discipline. However, some parents also reflect the actual difficulties and hope to purchase home cell phone signal jammer to interfere with/cut off cell phone signals. Yesterday, an older brother hoped that his younger sister could concentrate on studying. He sacrificed the fun of playing with mobile phones and bought a cell phone signal jammer. My heart is still very warm!

handheld signal blocker

Then let’s talk about how to choose a mobile phone signal jammer at home (to prevent students from indulging in mobile phones)?

Shielding range: The shielding range is proportional to the power. For low-power signal jammers, one is enough to install in a room, and the shielding area is about 20 square meters; while for high-power jammers, the shielding distance can reach 100-400 square meters. The local field strength is different or whether you need to go through the wall to decide (some parents will choose to install the mobile phone signal jammer in their own room).

Signal strength: The distance between the surroundings and the signal base station and now many cell buildings have signal base stations or signal amplifiers. According to the shielded frequency band: Before purchasing, you need to know which signals you want to shield. The ordinary mobile phone signal (2345G) can be selectively shielded. If you only shield 2G or only 345G, this can be adjusted before leaving the factory. There are 2.4GWIFI, 5.8GWIFI, VHF, UHF and other frequency bands. Here we need to explain the function of each signal frequency band. Simply put, 2G is the frequency band for making phone calls, and 2345G is the frequency band for mobile phones to access the Internet, so it depends on the specific shielding frequency band requirements.

Appearance: The appearance of the mobile phone signal jammer can be divided into an external antenna and an internal antenna. In general, the external antenna is externally installed and stretches out, so it takes up more space than the internal antenna. The volume is larger; because of the antenna extending outward, the effect of the external antenna is more stable.

Power supply: Generally, the power supply of the jamming device is the built-in lithium battery. After the power is used up, the power adapter can be used for charging; the desktop examination room uses 220V voltage power supply, and the car-mounted vehicle generally uses 12-36V voltage power supply.

How to use high-power test room signal jammer

The test room signal jammer has become an indispensable tool in the test room, escorting the information security of the test room. However, if we do not use the equipment correctly, there will be poor results, or even an exam room accident. The following Texin Electronics as a manufacturer will share the correct use of the test room signal jammer.

wireless network jammer Buy

1. The effective shielding range of the test room signal jammer will be different in different use sites. This is closely related to the signal field strength on site. The shielding range of mobile phones of different standards may not be the same at the same site;

2. Factors that affect the shielding range include but are not limited to: distance from the base station, orientation, obstacles, the wall material of the site building, the installation height of the shielding device, installation specifications, etc.;

3. Each antenna has a frequency band identification, which must correspond to the frequency band identification on the host one-to-one. Before turning on the high power jammer, ensure that each antenna is connected reliably. It is never allowed to turn on the device without connecting the antenna;

4. The surface temperature of the shield is about 40～50℃ after working for a long time, which is normal. If the surface temperature is too high, please turn off the power and try to contact your local dealer or agent;

5. The normal installation height is 1.8 meters ~ 2.5 meters, try to choose a place where there are no obstacles between the target shielding area. The wall-mounted installation requires the antenna to face up vertically. When placed on the desktop, the antenna can be folded 90 degrees and then up vertically. There should be no AC power lines or other audio and video lines within 0.2 meters of the antenna;

6. During use, in order to avoid possible interference to some electronic equipment, try to keep the distance between 1 and 2 meters above the following common equipment: stereo, wireless microphone, radio, computer, TV, Wi-Fi router, etc.

What are the advantages and application prospects of the mini wifi signal jammer?

I want to cut off the WiFi and Bluetooth signal and no one else knows that you cut off the signal. Any good idea will help to achieve the goal? Now the answer is of course to only use the hidden mini Bluetooth jammer. It’s just here. It can provide you with an unmissable opportunity to obtain high-quality mini wifi jammer.

Although there are many handheld WiFi bluetooth signal jammers on the market that can block WiFi bluetooth signals, it seems not so easy to find a hidden style, but only in this channel you will gain access. Take a look at the hidden mini Bluetooth jammer, it has the features you need. Then, just look at the details of this “mini handheld WiFi jammer with built-in antenna” as shown below.

portable gps jammers

This mini jammer is only used to interfere with 2400-2500MHz WiFi Bluetooth signals, with an output power of 0.5W. The output power of this handheld WiFi Bluetooth signal blocker is not strong, but due to the use of ultra-high frequency and micro-power interference technology and high efficiency, the effective interference range of this hidden mini Bluetooth jammer can reach 20 meters.

And according to the palm size design, whether you want to hold the hidden mini Bluetooth jammer or just put it in your pocket, you can easily reach your goal. In addition, because the car charger is also equipped with this hidden mini Bluetooth jammer, it can also be charged when people are driving.

The security of important meetings is inseparable from the strong support of mobile phone signal jammers

Cell phone jammer maintains a good environment for important meetings

We are tired of being interrupted, especially in important places, I am tired of ringing the phone. When the leader presided over an important meeting and was interrupted by the ringing of his cell phone, he was very angry. In order to make the meeting have a good communication environment, use mobile phone jammers in the meeting room.

With the popularity of mobile phones, mobile phone ringtones make people more tired, especially in some quiet public places. In many places, the use of mobile phones is prohibited, because the use of mobile phones will affect others and affect their rest or work. Although there are clear instructions to prohibit the use of mobile phones, many people use them in these places, such as gas stations, because it is dangerous to use mobile phones at gas stations and may cause an explosion.

We should know that important national conferences will last for many days. The content of the meeting must be kept strictly confidential, cannot be interrupted by the outside world, and the use of mobile phones is prohibited. This is not just a national conference, but also many company meetings have adopted cell phone barriers, prohibiting the use of cell phones and gradually installing cell phone barriers. What do you think about the rationality of installing mobile phone jammers in the office?

Not only is the use of mobile phones prohibited at gas stations, but many public places have also begun to prohibit the use of mobile phones. It may also be banned in certain private places. We have heard of the use of cell phone jammers in schools and cell phone jammers in prisons to disable cell phone signals and protect prison safety. How about the meeting room? Have you seen any examples of this? As people become more and more dependent on mobile phones, many companies have begun to install mobile phone jammers in the meeting rooms. And adjust the mobile phone interference range in the conference room. This will not affect the normal use of external mobile phones, and will provide a quiet meeting environment for the meeting.

If the ringing of the mobile phone interrupts the speaker’s thinking in an important meeting, it will make him feel uneasy and distract the meeting participants. It’s impolite to ring an important mobile phone in the meeting room. Therefore, before the start of many meetings, it prompts that the mobile phone will be turned off or set to mute. Many companies do not allow mobile phones to participate in meetings. This is visible in mobile phones in the Internet age The use of will become more and more clear, prohibiting supervision.

portable wireless signal jammers

If you are part of a meeting, how often do you hear your cell phone ringing during the meeting? I think you will be as angry as I am, dissatisfied with this behavior, and even scold the owner of the phone. This is an unhappy ending, not what we want to see. In order to avoid such unpleasant results, it is necessary to use a mobile phone shield in the meeting room. There are many advantages to using it in the meeting room. As you can see, uncivilized phenomena are prohibited. It not only prohibits the use of mobile phone ringtones, but also prohibits the use of mobile phones during this period.

If you are a boss and you often need to participate in meetings, the meeting always has mobile phones ringing or someone looking at the mobile phone, then you can install a mobile phone signal jammer to prohibit them from using their mobile phones.

The current situation and misunderstandings of using mobile phone jammers in prisons

Cell phone jammer Current situation:
1. The area that should be shielded is not strictly shielded, which is costly and laborious and has no actual effect;
2. The area that should not be shielded is seriously interfered, complained and cannot be used normally;
3. There is a gap between overly biased detection and pseudo base station technology, ideals and reality, and there are no real successful cases in China at present;

portable cell phone signal jammer

2. Misunderstanding:

①Using directional antenna can avoid interference
1. There is a certain transmitted signal strength outside the directional angle of the directional antenna, but it is much lower than the main lobe, not completely directional;
2. The reflection of the building will still cause external interference;
3. The frequency drift of the host computer seriously affects the base station and causes external interference;
4. TD full-time shielding interference must exist.

②The greater the power, the better
1. Inaccurate host frequency output, frequency drift, too wide bandwidth, waste of power, and interfered base station;
2. The simple frequency sweeping power suppression method has low shielding efficiency and large radiation;
3. The power is false standard, exaggerated publicity, and the nominal power loses its reference value;
4. Power is the foundation and technology is the key. It is better to find good methods and skills to fight for power;

③ The radiation of high power jammer is large, and the radiation of low-power is small
1. The high-power uses an outdoor antenna, which has a long operating distance, large shielding coverage, and uniform shielding signals, but radiation is minimal;
2. If the low-power equipment does not use multiple antennas for long-distance shielding, but is arranged in a centralized manner or 5 antennas are used together, the radiation power will be greater than 10 microwatts/square centimeter, and the short-distance radiation will definitely exceed the standard;

What does the price of the signal jammer depend on?

The signal jammer of the mobile phone is rarely used. The places that are often used may only be companies engaged in scientific research. There is also a research and development department on state secrets. The other is the military, where security and confidentiality related areas have set up cell phone signal blockers. It is better to have JAMMER-MART among the signal jammers in your hand. The brand Shenzhou Mingda is also sold at different prices. That’s because their performance is different. Let us look at the price of cell phone signal jammers.

indoor phone jammer

1. Cell phone signal shielding looks at the price from the power level
The mobile phone signal jammer has its own capabilities. Generally, the greater the power, the greater the range of cell phone signals that can be shielded, and the lower the power, the smaller the range of cell phone signals that can be shielded. Therefore, the price of mobile phone signal converters is also related to power.

2. The price of the signal jammer on the mobile phone is determined according to the main purpose.

We are also very aware of a problem, that is, the price of mobile phone signal jammers is determined according to the purpose. For example, if you buy a school with 5,000 students at a lower price, it is absolutely impossible, because the purpose of shielding cell phone signals is impossible. For example, if you buy an expensive cell phone signal blocker in a small meeting room or a small movie hall, this is not necessary. Because of the small area, we can buy a cell phone with lower power to block the cell phone signal. So according to your own use, decide what type of cell phone signal jammer to buy.