Blockage with jammers

A jamming transmitter sends a random signal (noise or pulses) with the greatest possible strength at a certain frequency and thus superimposes the original transmission. If jammers are used specifically, they are referred to as strategic jammer. These devices are also known as jammers and the process is known as noise jamming.

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Jammers are available for various radio protocols such as Bluetooth, WiFi, GSM, UMTS, LTE and GPS. Whereby the specific frequency of the radio protocols is disturbed. There are very simple and small devices that can only interfere with radio signals within a limited radius. For example, there is a small adapter for the car cigarette lighter with the function of interfering with the GPS signal. Portable devices with an integrated battery have a range of up to 20 meters under optimal conditions, depending on the version. Usually they can interfere with the signals in a room. Powerful stationary devices can have a range of up to 80 meters.

The use of jammers is illegal in Germany. They are primarily used by investigative authorities and the military services. Some of them are used in prisons to prevent illegal communication from prisoners. The challenge here is that no signals from outside are blocked, for example the cell phone signal to call the emergency call. Abroad, jammers are sometimes used in cinemas and theaters so that the events are not interrupted by a cell phone signal. Another use is, for example, the blocking of control signals from drones.

If such a jamming transmitter is used by attackers, it can be used, for example, to block the radio connections of surveillance cameras or window sensors of alarm systems. Therefore, interrupted connections must always be equated with an alarm. In addition, jammers can be detected by continuously testing a radio connection between two components with a cable connection. If the connection is interrupted, a jammer is active. Alternatively, but also more difficult to solve technically, the signal level, the strength of the radio signals, can be tested. If a new strong source is detected here, it could be a jamming transmitter.

Whether the signal shielding device can shield all communication signals

Nowadays, the emergence of shielding device has solved many hidden dangers of disrupting the order in the examination room, so that candidates can take the exam in a fair environment. The principle of this kind of test signal jammer is actually to block the communication signal of the mobile phone by isolating the electronic signal, which can prevent the phenomenon of using the mobile phone to cheat.

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Generally speaking, the effective range is within a radius of 0 to 30 meters. Generally, a low-power test signal jammer is enough to cover an entire classroom, which meets the needs of the test room for shielding signals, and is especially suitable for schools to purchase signals for the test room. shield.

Can the test signal jammer block all communication signals? Speaking of it, many people are unfamiliar with test signal jammers. In fact, it has been widely used in the college entrance examination examination room. In the college entrance examination last year, many examination rooms installed this kind of equipment and received it. Many good responses have been proven to have a good effect on preventing electronic signal cheating. Starting this year, it has been vigorously promoted to allow more examination rooms to install shields.

DJI launches drone self-interception system

The recent frequent occurrence of drone accidents shows that drones as a consumer-grade technology product have continued to gain popularity. At the same time, the level of safety of drones is also increasing.

he Verge reported that the famous Chinese drone manufacturer DJI launched a new self-intercepting software system “Geospatial Environment Online” (Geospatial Environment Online, GEO) this week, which can prevent DJI drones from flying in No-fly zone.

uav drone blocker

The GEO system allows users to know where drones will be restricted, whether it is due to regulatory requirements or safety issues. This is DJI’s innovative approach to respond to the Federal Aviation Administration (FAA), which has been calling for more rules for drone flight over the past year.

According to The Verge, the drone jammer can prevent DJI UAV systems from flying in no-fly zones such as airports and Washington, D.C., and can also let users know which airspaces are temporarily restricted from flying, such as areas close to forest fires or major sports events. Sensitive areas around prisons and power plants are also restricted in the system.

However, users of DJI drones can still temporarily exit the GEO system and unlock some flight restrictions. However, if an accident occurs, the user will be checked by the regulatory authorities. Users who want to temporarily unlock must have a DJI-certified account and have registered credit card, debit card or mobile phone number information. If the drone is found flying in an unauthorized airspace, the supervisory authority can find the person in charge. However, drone users cannot close all flight restrictions, and areas such as Washington, DC are still completely banned from flying.

Why the actual working range of jammers is different

Here we are going to talk about the scope of work of whining, which is one of the most controversial equipment issues on the Internet and is the concern of most of the customers.

We know that every storage device has a different restricted area, which has already been mentioned. In general, the higher the force, the longer the stagnation radius. And the higher the force, the bigger the size of the WiFi jammer, and they also need a cooling system. For this reason, desktop jammers generally have a wider range of interference than portable jammers. So before you buy a jammer, you need to determine the type of whine you will need and the storage area you want. Both should be considered, then you can get what you want.

desktop mobile phone blocker

In the introduction of each interferer, we emphasized that the interference range of the jammer is only used as a reference, please anticipate the current situation. Jamming range depends on the local signal strength. Here we will try to explain why the manufacturer’s workspace often differs from the actual fact.

At the beginning, when the woe is made, it is tested. There are many necessary tests, such as battery life, transmission frequency, etc., including test congestion radius. The manufacturer always thinks that the test results are more effective than the actual range, as these devices are often tested in empty fields. They know that buildings and various concrete structures can impede the transmission of signals. And most of us live in big cities, we are surrounded by skyscrapers. While the local cell phone signal strength is also a factor of the impact. So don’t be surprised if your clogged device can’t block the phone within 30 meters of you.

Of course, you don’t have to worry about the woes that don’t suit your needs. There are many different types of signal jammers here. You can get what you want according to your situation. Like a general portable jammer, they have a very decent work area, especially if your main goal is to stop people around. I think they got to 5 meters which is enough, especially now that you are on the bus you want people to stop for a minute or two. Such a device will definitely help you.

Something about the frequency of GPS jammers

GPS jammer is the main role is to prevent GPS tracking device. We were told about how it works in the article “what is misery”. If you are concerned about someone chasing you, you may need a GPS jammer to prevent others from using the GPS tracker to track you.

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Before you buy it, there is something you should be aware of about these devices. One of the main issues to check when purchasing a GPS jammer is its frequency of operation. Because GPS tracking devices use a variety of frequency bands, especially the GPS L1 band, but there are other frequencies to use, so you need to know the frequency and choose what you need to set their working frequency. Please note that the frequency of the jammer used must be the same as the frequency used by the GPS tracking device for the jammer to work effectively. There are hundreds of GPS jammers on the market so it should be easy to find a jammer that suits your needs and requirements.

If you don’t know the frequency of these trackers, don’t worry. There are many types of GPS jammers, some of which block a primary GPS L1 frequency, and some may be able to block several at once. Of course, there are many high-end models that can block any tracking frequency (GPS L1 L2 L5, GLONASS, Galileo, Compass, etc.) If you want to be sure you haven’t “followed” these tools are yours Option, and of course these devices can be quite expensive, so you should determine how much money you will be making. Surely the GPS jammer can help you keep GPS tracking.

GPS jammers have different qualities – battery life and the frequency of assistance. The most important is the frequency of device support. Battery life is also an important characteristic, and if you plan to use Jammer for a long time, it should be checked carefully. In general, the battery life of portable jammers cannot be used for a long time on a single charge. If you’ve been wanting to use Jammer for a long time. Desktop jammers are better because they are generally used when loading.

For more information about jammers, please visit https://www.jammer-mart.com/article.html

Hidden WiFi Bluetooth 3G 4G Cell Phone Signal Jammer

Everyone knows that stress can lead to mental deterioration that can endanger their health. It is said that relaxation is the key to a healthy mind and body. Learn to relax, learn to use 4G cell phone signal interference, get away from 4G phone, open your health and good life.

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Desktop WiFi Bluetooth 3G Cell Phone Signal Jammer with Hidden 4G Phone.

As we all know, stress is part of everyday life and cannot be avoided. As the pace of modern life continues to accelerate, we can always feel the pressure from morning to night. It’s hard to slow down. Hence, stress and life are closely related in a highly competitive society. How to Maintain Good Condition? Let me tell you, calmly restore your life, turn off your computer and drop your phone. You will find that the pressure disappears. How it goes? Buy a hidden wifi bluetooth 3G 4G cell phone jammer from this professional manufacturer www.jammer-mart.com and you will fall in love with peace.

However, different people have different views about stress. Some people think that stress is not a bad thing. In her view, a certain amount of stress is important for motivation and life. Others think stress can lead to mental decline and harm their health. According to them, relaxation is the key to a healthy mind and body. Learn to relax, learn to use 4G cell phone signal interference, stay away from 4G cell phones, for your health and a better life.

Desktop wifi bluetooth jammer. And according to the specific situation, the interference distance is up to 15 meters signal strength Interruption GSM GSM DCS PCS 3G WiFi Bluetooth 4G signal At the same time, it is really powerful and versatile to protect your rest of life and meet all your interruption needs. If you feel that the nearby cellphone is disturbing the peace and quiet you need, then you can turn the button on and legally return to the right place.

On the necessity of using mobile phone signal jammer in important occasions

Today’s mobile phones are becoming more powerful and smarter. You can not only make calls, send text messages, but also social chat through your mobile phones. Some social software is also more powerful, you can do live broadcast, you can receive video with the other party on the spot, and you can also record… Then there is a kind of rigor in important occasions, if it is some business secrets to hold meetings or discuss For any plan, in order to avoid the transmission of internal and external messages, and to protect the security of this plan, a cell phone jammer can be used.

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Commercial competition is getting stronger and stronger, especially some commercial secrets. After all, the competition is fierce. When there are any new tricks or new things invented, or when there is a commercial plan, it must be kept secret from the outside. It cannot be ruled out that internal staff have been bought by other companies. In this case, when discussing plans or meeting in secret, employees may leak secrets with other companies. You can use a mobile phone signal jammer. With the jammer, you can avoid internal leaks.

When discussing important secrets, a mobile phone signal blocker can be used just in case. If there is a recording, it can be blocked, and the order of the meeting can also be maintained to avoid the interference of the mobile phone. Chengdu Saiyue Communication Technology Co., Ltd. has focused on the development, production, sales and engineering installation of jammers for more than 10 years. It is one of the few most professional signal jammer manufacturers in China. The Chengdu Saiyuetong brand wireless signal jammer system provides mobile phone jammers | GPS signal jammers | wireless WIFI mobile phone signal shielding | one-stop signal shielding solutions for prisons, detention centers, schools, examination rooms and other important places.

What can a prison cell phone signal jammer achieve?

If there is no cell phone jammer in the prison

Contraband phones are a terrible problem. They allow prisoners to secretly handle drugs, run illegal businesses and even organize murders, under the supervision of guards and warden. A prison in South Carolina recently discovered 35,000 cell phone calls and text messages in 23 days. This is a very serious problem for prisons.

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The cell phone owned by the prisoner allows him to contact external partners in the crime to coordinate escape plans, thereby creating a life-threatening situation for the agency’s guards and the public. More commonly, reports from correctional facilities indicate that the overwhelming majority of hidden mobile phones were used to harass victims of their crimes, or that a prisoner repeatedly intimidated his victim to persuade the victim to abandon the accusation or change him. Story to instill doubtful testimony.

Many detainees continue to organize illegal drug trade from within the prison walls. Mobile phones are an important means for detainees to keep drug organizations running and tightly controlled. By contacting visitors before they arrive, prisoners can arrange for the transfer of drugs and drug paraphernalia, allowing them to continue the illegal habits of being detained. The family is often harassed by relatives who have been imprisoned, and when the family realizes that their relatives receive better services during detention, they ask for bail.

A prominent issue is the prisoner’s ability to contact witnesses before an upcoming hearing, trial or appeal. By matching the absence or correcting the conflict in the testimony, the defendant can win relief or complete dismissal charges. The frightening concern that the prison considers is the undetected use of cell phones by prisoners in order to warn other prisoners before accidental searches that may confiscate cell phones, knives, drugs, syringes and other prohibited items. Such smuggled goods may cause life-threatening conditions to prison guards and medical staff.

The prison has tried and failed to prevent cell phones from entering the prison. If there is no way to prevent cell phones from entering the prison, prisoners must also be prevented from using cell phones normally inside the prison.

Truth|Does the cell phone signal jammer affect the human body?

Generally, people have inexplicable rejection of wireless devices. They always think that the signals emitted by wireless electronic products will affect their health. So, today, let’s talk about whether cell phone signal jammers have any impact on human health.

First of all, concerns about radiation from electronic products have always been a controversial issue among the people. Because we know that all electronic products have radiation, but different products have different amounts of radiation. Generally, the equipment of regular cell phone jammer will be monitored by the National Center for Disease Control and Prevention before leaving the factory. At present, the National Standards of the People’s Republic of China “Electromagnetic Radiation Protection Regulations” (GB8702-88) and the People’s Republic of China Environmental Radio Wave Hygiene Standards (GB9175-88), according to the national standard radiation level requirements, are allowed only after manufacturers who produce electronic products have passed the test. sell. And after installation on site, it also needs to undergo radiation testing by the National Center for Disease Control and Prevention. For engineering sites that meet national standards, the National Center for Disease Control and Prevention will issue an electromagnetic radiation testing report.

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After testing, electronic products that meet the national standard radiation level requirements have no effect on the human body, so there is no need to worry about whether the signal radiation of the mobile phone signal jammer will affect the health of the body. In addition, according to the conversion of relevant data, the amount of radiation from the mobile phone to the human body should be the largest, and the radiation from the shield to the human body is almost negligible compared with the radiation of the mobile phone we use daily.

Jammer-mart is a manufacturer specializing in the production and operation of mobile phone signal jammers. It provides complete wireless signal jammers, mobile phone jammers, GPS signal jammers, wireless WIFI mobile phone signal shielding products and one station for school examination rooms, prisons, detention centers and other places. Type signal shielding solution.

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Talk about the 4 advantages of wireless signal jammer

In the last few years, various types of cell phone jammer have emerged in an endless stream. We are dazzled and dizzy. In fact, not all products are suitable for us to apply to ourselves. Some products are public, so they are not suitable. There is a very special jammer used in other fields by us, and it also appears in front of us. Its name is wireless signal jammer. So what are the advantages of this type of product?

When we use a wireless signal jammer, you will find that no matter where we are, as long as we can turn on such a jammer, no one can search for our wireless signal. In other words, home The effect of the product is more obvious than that of common public products. In such an environment, we can always shield all signals easily, but if we use a public shield, then the shielding effect may be unstable The problem, so we need to understand the specific use effect.

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What are the advantages of wireless signal jammers? The following editor from Chengdu Saiyue will explain the 4 advantages of Saiyue wireless signal jammer one by one.

1. Wide application
Wireless signal jammer is mainly used in examination rooms, but not limited to examination rooms. They can also be used in prisons, gas stations, mobile phone bomb prevention, oil depots, liquefied gas stations, detention centers, interrogation rooms, courts, labor reform teams, conference rooms, theaters, churches, Only used in libraries, school dormitories, special security and confidential occasions (confidential offices, negotiation rooms, mobile vehicles, mobile political and business dignitaries guarding the scene).

2. Strong pertinence
Wireless signal jammers can be mainly used for domestic college entrance examinations, domestic college entrance examinations, adult college entrance examinations, self-study examinations and various colleges and universities examinations, as well as various middle schools, technical secondary schools, vocational high schools, prisons, detention centers, conference rooms, etc. Use mobile phones to cheat, send text messages, Adverse effects caused by communication with outside prisoners, collusion with others, etc.

Three, the shielded signals are diverse
Effectively shield GSM/CDMA/DCS/PHS/TD-SCDMA/WCDMA/WIFI/TD-LTE/FDD-LTE.

Fourth, model advantages
1. Using high-dispersion aluminum alloy shell, low working temperature, more stable shielding effect.
2. Built-in silent turbo fan, low working noise.
3. Separate power adapter. 12V/24V DC power supply work, convenient for vehicle mobile work.
4. The antenna is externally designed, and one end of the interface is unified to make the appearance more beautiful and decent. It also has an anti-loosening design, and the antenna and the host have a marked working frequency band to facilitate one-to-one correspondence.

A major feature of the wireless signal jammer is that it is easy to carry, because it is relatively small, so when we go out, we can also carry it around, but there are other types of products around us. There are major drawbacks. Because the public products are relatively large in size and heavy in quality, they may consume a lot of manpower, material and financial resources during the carrying process, and sometimes even extremely difficult problems occur. In comparison, the reputation of household products will naturally be more ideal and more convenient.