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What are the differences between ordinary mobile phone signal jammers and high-quality signal jammers?

Signal jammer, generally speaking, can be divided into ordinary shielding and high-quality shielding.

Ordinary shielding, its technical characteristics are mainly based on shielding principles, using a large number of low-power or high-power devices to fight against, staying on simple technical solutions.

gps wifi cell phone jammers

High-quality shielding, its technical characteristics adopt strong signal digital frequency hopping technology, which reduces radiation by 150 times compared with ordinary shielding technology; mainly outdoor shielding, reducing indoor radiated power by hundreds of times; multi-channel combined technology, full-frequency antenna replacement N frequency-dividing antennas are suitable for wireless remoteness, laying the foundation for distributed antennas; using distributed antenna technology, reasonable distribution of shielding power, dispersing the power signal, reducing antenna radiation, providing tens of times the efficiency, and eliminating dead spots and leaks ; Jike’s unique TD synchronization technology, for China Mobile’s 3G (TD-SCDMA) and 4G (TD-LTE) networks, only shields the downlink pilot time slot to prevent interference to the base station, obtained by the China Mobile and Radio Management Committee The recognition, while reducing radiation dozens of times.

Comparison item Normal shielding Quality shielding
Low price moderate price
Technology
Basic shielding principle
Run by quantity
1. Digital dot frequency/frequency hopping technology
2. Multiplexing technology
3. Distributed antenna technology
4. Jike TD synchronization technology
Installation location is uncertain Outdoor
Radiation big radiation small radiation
Effect
1. Cannot fully shield
2. Large interference:
To surrounding/base station
3. Unstable operation
it is good
Service life is shorter than three years

How to crack the working principle of the mobile phone signal shielding device in the college entrance examination examination room?

There are generally two ways to block cell phone signals:

One way is the same as the principle of closed-circuit television. Put the mobile phone in a metal mesh bag, and in principle all electromagnetic waves will be shielded.

Another is that if you walk into an area, the mobile phone will have no signal. This is because there is an electromagnetic wave transmitter in the area. Its frequency is the same as that of the mobile phone. The signal it emits interferes with the signal of the mobile phone.

The cell phone jammer currently on the market work in accordance with the second method. In fact, the principle is very simple, but private use of this frequency band is illegal and cannot generate commercial value, but now schools are starting to use it to prevent cheating. Let’s take a look at its working principle.

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, and the data and sound transmission are completed with a certain baud rate and modulation method. In response to this communication principle, the mobile phone signal jammer scans from the low-end frequency of the forward channel to the high-end at a certain speed during operation. 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.

How to crack?

First of all, I feel shameless about this title because it has no solution. I am actually telling everyone how to avoid it?

Method one (very silly and shameless): When entering the examination room, secretly turn on the shield while the teacher is not paying attention. At the beginning of the exam, the teacher will habitually turn on the shield, because the shield itself is turned on, so… it will be turned off!

Method two (luck): WIFI, WLAN unlimited local area network functions only available in smart phones, turn on wifi, wlan and other devices, search-connect-confirm-enter the password (default password 12345678). According to experience, all routers like to use the wifi password The setting is the same as the username, you know. (Because many jammer products in the market do not shield and interfere with the 2.4G frequency band of WIFI)

Method three (tips): When the mobile phone has no signal, click Settings-Network-Network Selection-Manual-Searching Network-Select Network (China Mobile/China Unicom/China Telecom) Speed select the type of card you use, speed exit, so Short-time signals can be obtained. This method consumes more power because it needs to search the Internet.

What are the main applications of anti-UAV systems

According to its product manual, the anti-UAV system allegedly uses signal jammer on 2.4 and 5.8 GHz frequencies. It also has technology that can block GPS and the Russian equivalent of GLONASS.

By the end of 2017, the long-range automatic anti-UAV system provided by Shenzhou Mingda can provide the detection range of a small drone like the DJI phantom, up to 5 kilometers, 360-degree panoramic coverage, no blind spots and visual tracking capabilities. Identify and eliminate drones up to 2 kilometers away. The system is composed of advanced military radar, advanced long-range EO/IR visible and thermal infrared day and night PTZ surveillance camera system and powerful broad-spectrum RF and GPS signal jammer. . This automated system will provide 24/7 detection, tracking and elimination of drones/unmanned aerial vehicles, with the option of static jammers for permanent installation, making it a high level of mobile, perimeter security, activities, airports, and rural and urban security Ideal choice for value goals. Threats up to 10 kilometers in diameter.

drone signal blocker

There are many systems that can be used to land willful or dangerous drones, but they often have a big gain: you need to be relatively close to the drone, which can be scary if the robot plane is loading explosives. It is launching a drone strike gun, a jammer that can disable drone signals (including GPS and GLONASS positioning) from 1.2 miles away. Like most competitors, it will not destroy the target drone-it simply forces the vehicle to land or return to its starting point. Anti-drone teams can not only disable threats from a safe distance, they can also locate their pilots.

The authorities have now begun field tests of their new anti-drone “gun”, which can shoot down any unpopular drone. The police used a new drone jammer in a recent large football match. Any drones that intrude into the competition venue are banned and forced to land via the signal interference capability of the system.

According to reports, the new jamming system is able to capture the target from a kilometer away, which gives it enough range to eliminate the incoming air threat before it arrives. The authorities are taking these types of threats seriously, which is why they may buy more units for different police agencies in the country.

Anti-drone technology is necessary in the future

Anti-UAV technology, why is it essential for airports.

With the dramatic increase in drone penetration in the past few years, controlling the sky above us has become an additional responsibility. UAV detection solutions have become very important, not only can detect long-distance UAVs, but also access a variety of potentially important information, such as controller location and UAV model.

Who are those organizations that rely on drone detection? The police force certainly bears a great deal of responsibility when tracking illegal activities involving drones, but the airport (probably more than any other type of venue) must fully control the sky above its location. As drones increasingly enter the airspace around airports, this reality has become more relevant in recent times.

Last summer, a drone entered the airspace near Gatwick Airport, causing five aircraft to be diverted and completely closed the runway.

In addition to endangering the safety of passengers on board, taking up air traffic control time, and causing inconvenience to people who eventually misplace or put their journey on hold, it can be said with certainty that the interruption of drones will eventually cause great losses to airlines. All these problems are caused by a relatively small unmanned aerial vehicle, which emphasizes the importance of airport drone detection.

According to this BBC article, the British Airprox Commission conducted an investigation into the Gatwick incident and concluded that the incident caused as many as 130 deaths.

Time for action

The truth is not a lie. According to Airprox’s data, in the last two years of records, 168% of aircraft errors on drones and aircraft. The drone caused chaos around the airport, stopped flying, almost lost the aircraft and caused delays.

In December 2018, a drone report at Gatwick Airport grounded all flights and disrupted thousands of passengers within 24 hours. Fortunately, there is a solution to these problems and return more control to those who work on the ground.

UAV automatic detection and defense solutions can let people know those who pay attention to the sky. UAVs can now be detected up to 20 kilometers away, and early warning can give precious time to prepare and deal with any type of UAV threat.

drone jammer gun high power

The ability to identify the location of the controller gives the airport the opportunity to more effectively liaise with law enforcement agencies to take action against those who violate its airspace. It can identify a specific drone model and the actual serial number of a single drone that has been detected. This is enhanced by the flow of information to be able to pinpoint the heading, speed and altitude of the drone-all potentially key facts that could affect the actions taken by air traffic control.

Portable drone jammer has become a popular anti-drone technology option, suitable for police forces that require drone detection on the move, but when it comes to airports, the fixed version may see the most demand .

Talking about the advantages of UAV jammers

Today, more and more people complain that their personal lives are often exposed to unauthorized drones. UAVs are very famous today, they are usually used to capture important events or certain objects from the air. Since these technologies do not stand in the same place, new and more advanced models of drones and squares are being created every day that can turn your personal life into the object of particularly curious espionage.

Intruders are one kilometer or more away from objects protected by traditional security systems. They can conduct industrial espionage from the air, monitor private life, throw prohibited items around guards or export valuables, and drugs bypass control points and inspections. Considering the growing threat of terrorism around the world, the use of drones carrying explosive devices can be expected to attack crowded locations and sensitive infrastructure elements. Equally dangerous is the drone, whose operators simply lose control and stay away. Such drones are in the airport area even at very high altitudes, and can enter the engine of the flying or landing aircraft and turn off the power cord.

Thieves can obtain detailed information about the location of guards and installed CCTV cameras, the location of storage facilities, and the number of any secret equipment. As you can see, with the help of drones, detailed information can be obtained. Therefore, if you want to protect yourself from unauthorized entry into your personal life or business, then you should know what drone jamming technology is. The jammers of quadcopters and drones are high-power devices that can block the audio and video transmission of information. These devices are beneficial because they can store confidential materials.

When choosing a drone jammer, please pay attention to the spectrum of the blocking frequency. The drone jammer is a powerful device that can effectively prevent the operation of the following frequencies: video transmission frequency (2.4G WIFI 2400-2500MHz 20W); remote control frequency (2.4G WIFI 2400-2500MHz 20W); ˚F video Transmission and remote radio control (5.8G 5.5-5.9MHz 2W) rate; ˚F remote radio control nuclear rate (868-912 MHz, 860-920MHz 25W, 20W 433-434MHz); GPS frequency L1 1575 MHz 40W.

uav drone blocker

The anti-drone jammer is equipped with multiple pin antennas. The length of the antenna can be different. The blocking radius of the suppressor can also vary according to the signal strength, location, and remoteness of the basic control. The more powerful the function you choose, the larger the blocking radius. It is important to note that the jammer has a low-noise built-in fan. With such a reliable cooling system, you can stay calm and overheating will not pose a threat to you.

Most drone radio jammers have unlimited working hours, so you can use it for a long time. Signal jammer is specifically used for advantageous purposes to ensure control of the territory, prevent industrial espionage, counter-terrorism purposes, attempts to move narcotic substances, certain types of weapons, personal family information or commercial espionage, etc. 2.4 GHz jammer for drones-ideal for any citizen who cares about privacy. If you have any questions about drone blockers, you can call our manager or send a message. We are happy to answer all your questions. In addition, we will help you choose a suppressor that meets all your requirements.

A hundred shots and a hundred hits within 2000 meters, the drones dare to fly randomly?

The UAV counter-gun is a kind of electromagnetic interference equipment with a gun type, which is not only a gun type but also a splint type.

The Wuhan police demonstrated that they are equipped with the latest domestically-made “electromagnetic rifles.” In the opening match of the China League One held last week, a drone of unknown origin broke into the event site, seriously disrupting the progress of the game. Afterwards, the Wuhan police took out their new equipment-a silver-gray drone counter-gun about 1 meter long, and “shot down” the opponent with a single shot. On the day of the match, the Wuhan police used the gun six times to expel the approaching drone.

portable drone blocker gun-type

The drone was not broken into pieces, but landed slowly on the ground. According to the International Business Times, the principle of this weapon is to emit electromagnetic interference waves between 2.4GHz and 5.8GHz, interrupting the connection between remote control equipment and drones. Because most drone remote controls are also in this frequency range.

This drone jammer uses a combination of an integrated information source and a broadband power amplifier, and the source integrates 8 frequency bands. The full frequency band coverage of radio from 300MHz to 6GHz is closer to the current mainstream UAV radio remote control and image transmission signal modulation method. The intensity of electromagnetic waves it emits is 8 times that of ordinary jammers. It can accurately distinguish various drones at a distance of 3 to 5 kilometers, and effectively intercept within a range of 500 meters to 2000 meters.

Criminals complete the theft in 20 seconds

Recently, the border defense detachment of Dongguan City, Guangdong reported that a series of car property theft cases that occurred in service areas such as Guangzhou-Shenzhen Expressway Houjie this year have been solved. Criminal gangs used signal jammer to transmit signal interference, causing car owners to lock the car and steal the car. Inside property.

pocket gps signal jammer

From the surveillance video, we can see that in the Dalingshan service area of the Guangzhou-Shenzhen Expressway, a man wearing a white short-sleeved T-shirt got off a black car. He seemed to be moving his muscles and bones. In fact, he was just pretending to rest and looking for the target of the crime. . Soon, a gray SUV drove into the service area and stopped. A man and a woman in the car closed the door and left.

At this time, the criminal suspect appeared again, and saw him approaching the SUV car casually, opened the door easily, quickly got something from the car, turned around and got into the corresponding vehicle and quickly escaped. The entire theft process took less than 20 seconds.

In the end, the Hunan suspect Tan and his associates were arrested by the police in a hotel in Dongguan at the end of September. In the face of hard evidence, Tan and his associates confessed to the crime.

How to deal with “car jammers”?

①When traveling or shopping for parking, try to choose a public parking lot with camera monitoring. Especially when parking overnight, try to park in a parking lot that is supervised by someone.

②When locking the car, pay attention to the phenomenon of locking the car. For example, when some cars are locked, the two rearview mirrors will be retracted; when some cars are locked, the turn signal will flash twice, etc. When an abnormal lock is found in the use of an electronic lock, a manual lock should be used to increase the safety factor and try to avoid unnecessary losses.

③When you lock the car, pay attention to whether there are suspicious people around. Before you leave the car, pull the car door with your hands to make sure it is locked.

④Don’t put valuables such as leather bags, mobile phones, cash, etc. in the car, so as not to let criminals catch them.

The conference hall shields the mobile phone signal, this can have

Some cadres complained that during a meeting, the conference hall would turn on the mobile phone signal jammer to block the mobile phone signal. Once they entered the conference hall, they were completely “lost” and were very uncomfortable. Some people think that this is “a delay”, saying that they have been complained by the masses because the mobile phone cannot be reached. Some people even directly asked: Is it necessary? Have a meeting and leave the phone temporarily, is it really that serious? Nowadays, the mobile phone has become an “external organ” of modern people, regardless of whether it is on the way to work, at work, or at a party, it is in the state of “people do not leave the machine, the machine does not leave the hand”. The latest survey shows that Chinese people look at their mobile phones for an average of 3 hours a day, making them the second most addicted person in the world.

portable wireless signal jammers

People’s attention is severely distracted, time is cut into fragments. Not to mention the whole time of a meeting, even if it is more than ten minutes without looking at the phone, many people are not at ease. Some netizens describe that the most painful thing today is not “the distance between life and death” but “the phone has no power, no internet, no signal.” In a conference that should be serious and efficient, we are also used to seeing too many “head down landscapes”: he is using his mobile phone when setting up work on the stage; he is using his mobile phone to convey the spirit on the stage; Cell phone. Really busy managing everything, can’t stop for a moment? Closer to see, there are not many electronic offices. Most of them are browsing Moments, or even visiting online stores and playing games. If you want to portray these people, it is more appropriate to “read only the mobile phone screen and ignore the meeting.” Of course, it is difficult to put into the meeting agenda with such a deliberate and absent-minded participation.

From this point of view, cell phone jammer for meetings are not necessary, but necessary. Compared with the small probability event of cutting off the network cable and “delaying work”, the negative effects of playing mobile phones are much greater. We often talk about holding useful and efficient meetings. The “useful” and “efficient” here mean that the content of the meeting must be free from formalism and less idioms in Mandarin. At the same time, it should also include the attendees, heart, and brain. If all of you here are “people sitting in the meeting place and their hearts floating on the Internet”, the meeting will be reduced to another form of formalism. If we are opposed to meetings for the sake of meetings and emphasize on solving practical problems, then we should also be wary of perfunctory participation attitudes, and we should also restrict mobile phones from “buzzing” and “didi” disturbing people’s minds. “If you have a problem, hold a meeting and put it on the table to discuss.” “Large meetings, medium meetings, and small meetings are all necessary.

Can a mobile phone signal jammer in an examination room shield a classroom?

Important admissions exams, qualification exams or final exams need to install mobile phone signal jammers to shield the electronic signals around the exam room and prevent possible electronic cheating. So, how much area can the mobile phone signal jammer in the examination room shield? Can only one shielding device be used in an examination room for shielding purposes? How many jammers should be used in a teaching building?

First of all, we need to know: The cell phone jammer in the examination room has a theoretical shielding range, which is about a radius of 0-20 meters. But please note that this is a theoretical distance. The actual effect should be combined with the local signal strength, especially whether there is a signal base station nearby. If there is a signal base station within 200 meters, the shielding effect will be compromised. In addition, the wall will weaken the shielding effect of the shield. As the signal is stronger near the window, the shielding effect will be weakened.

arm gsm 3g gps phone jammer

The standard classrooms in schools are generally about 75 square meters, each classroom equipped with a shielding device can achieve better results. It can be placed in the middle of the classroom for maximum shielding. Of course, this must be determined in conjunction with the power supply wiring. It is also common to place the shield at the podium. If it is a larger classroom or there is a base station nearby, you can place two jammers in each classroom, one at the front and one at the front, and the shielding signal is superimposed and enhanced, and a better effect of 1+1>2 will be achieved. In addition, in order to ensure the shielding effect, another shield can be arranged every 10-20 meters in the aisle of the teaching building. Finally, it should be noted that the installation height of the shield is preferably 1.5-2 meters from the ground.

MDPB-5E (6 channels) upgraded mobile phone signal jammer is a mobile phone signal jammer specially developed and produced by adopting international advanced shielding technology to meet market demand. The equipment has undergone a brand-new upgrade, changing from 5 channels to 6 channels increases the shielding effect of the device itself on the signal. At the same time, the newly added 4G frequency band solves the disadvantages that other products cannot shield the 4G frequency band, and the shielding effect is better than other similar products. The shielding effect is stronger, the performance is more stable, and it is easier to be recognized and accepted by customers.

MDPB-5E (6 channels) upgraded mobile phone signal jammer can automatically form a shielding magnetic field within the specified range when it enters the working state, forcibly disabling mobile phone signals, MDPB-5E (6 channels) upgraded mobile phone signal jammer only works Mobile phone communication signals are shielded without causing interference to other electronic devices, which has also become its rare advantage. The advent of the upgraded version of MDPB-5E (6 channels) mobile phone signal jammer may completely solve the harm to users caused by the information leakage of communication facilities, allowing people to enjoy the speed and convenience brought by high-tech to mankind while ensuring The security of its information.

MDPB-5E (6 channels) upgraded mobile phone signal jammerIts most important applications are in examination rooms, prisons, gas stations, mobile phone bomb prevention, oil depots, liquefied gas stations, detention centers, interrogation rooms, courts, labor reform teams, conference rooms, theaters , Churches, libraries, school dormitories, special security and confidential occasions (confidential offices, negotiation rooms, mobile vehicles, mobile politicians and business dignitaries guarding) scenes, etc., and mobile phone signal jammers are becoming more and more important in social life.

Which network frequency bands can the 4g signal jammer shield?

There are some differences in the working principles of different jamming device. In some special cases, people want to know how to avoid jammers in mobile phones. At this time, we need to understand all aspects and be able to constantly understand these frequency bands. It is the most important. Many jammers basically have these relatively fixed frequency bands in the process of working. We can understand them correctly, and then keep our signal within the range of this frequency band. Then for you, it is natural Can be avoided.

gps jammer

How do mobile phones avoid the principle of jammers? When you want to avoid jammers, everyone should really understand the specific principles. The principles of different devices will have certain differences, so we should do well in all aspects. The understanding and correct understanding of the specific principles can then bring us more development, so we all need to pay attention to this aspect in time when we are doing it. This is our better way to avoid problems. Prospects.

When you want to know how to avoid jammers on mobile phones, you can really use the new device during the whole use process. When many new device identities are in use, because the specific frequency bands of these signals are not within the overall control range at all, we need to truly understand each situation during the application process. Make the choice of equipment carefully so that it will be better for the whole process, so you need to have a complete understanding of the process.

If you really want to know how to avoid jammers on mobile phones, there is one of the most direct and effective methods, and then you can directly damage the device while others are not paying attention. When you can do a good job of destroying the device, otherwise the mobile phone will not be affected, but in this process, you should still pay attention to more aspects, and be able to really understand clearly under this situation . If you can turn off the power secretly, or destroy the total power supply, you can prevent the jammer from working and ensure that we can use the phone normally. In the process of choosing a method, you need to truly combine your own actual situation, and then choose a practical method.