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At present, data signals are almost everywhere, and all electrical equipment will be surrounded by them. When the mobile phone is not used, the impact of these heavily surrounded signals on other electrical equipment is minimal. This is because when the mobile phone is not used, there is no communication between the mobile phone and the base station, and there is no communication between the mobile phone and the base station. It is unlikely that sudden changes in signals will occur. The electrical equipment is surrounded by a relatively stable magnetic field, which is a static magnetic field. The impact of this static magnetic field on the electrical equipment is almost zero.

When using a mobile phone, there is data communication between the mobile phone and the base station, which generates random sudden change signals, causing a dynamic magnetic field to be generated around the electrical equipment. This dynamic magnetic field signal, Sudden changes in electromagnetic interference can be induced magnetically, which can easily lead to neurological disorders in electrical equipment.

When the mobile phone starts up and rings, it can generate enough kinetic energy to cause a slight flame and spark discharge, which is likely to cause a fire accident. Relevant departments such as petroleum industry, chemical industry, and security have clearly stipulated that mobile phones are strictly prohibited in gas filling stations, and the implementation of wifi signal jammer equipment is currently not ideal.

The equipment at the gas station is all controlled by computers. The signal will affect the normal operation of the equipment and cause measurement failure. What’s more important is that flames will appear on the phone during the dialing process, which is very easy. Causing a fire accident and causing an explosion at a gas station. Therefore, the use of mobile phones at gas stations, which are important areas for fire safety, is not only prohibited within the website, but also does not require the use of mobile phones within two or three meters of the gas station. In addition, gas filling stations should set up a clear sign that calls on mobile phones are strictly prohibited, and increase publicity on the importance of safety knowledge, so that everyone understands that making calls on mobile phones in gas filling stations is definitely a violation of the same industry.

There have been several fire accidents across the country caused by the use of mobile phones. A major accident occurred at a gas station in Henan Province when a driver used his mobile phone while refueling, causing an explosion and resulting in many casualties. There have also been several fire accidents and emergencies caused by cell phone use at gas filling stations in Shenzhen, Chongqing and other places. The risks caused by using mobile phones at gas filling stations have attracted the attention of all parties. Relevant departments in Beijing, Hubei Province, Inner Mongolia Autonomous Region, Guangdong Province, Henan Province, Shandong Province, Jiangxi Province, Sichuan, Chongqing City and other places have proposed the use of wireless signal jammer equipment at gas filling stations under their jurisdiction. The headquarters of Sinopec Corporation and China National Petroleum Corporation have already taken the lead in using wireless signal shielding equipment at gas filling stations in some areas.

Every year during the college entrance examination, the school will have network problems, such as mobile phone disconnections and slow Internet speed, because the school has turned on the cell phone jammer. If we think of cell phones as handheld two-way radios, radios are subject to interference, and cell phones are no exception. Like any radio, cell phone signals are subject to interference.

In this article, Topsignaljammer will talk to you about how cell phone jammers work.

interference principle

Jamming a cell phone is like jamming any other type of radio communication. Mobile phones communicate with their serving networks through base stations. As a cell phone user drives down the street, the signal switches from one cell tower to another.

Frequency ranges of the three major operators

We know that wireless communication uses electromagnetic waves to communicate. The functional properties of electromagnetic waves are determined by their frequency. Our mobile phones must emit electromagnetic waves that meet the requirements in order to connect to our communications operator base stations. Different communication systems use different frequencies so everyone is calm and doesn't interfere with each other. The basic principle behind cell phone jamming devices is to emit the same radio frequencies as cell phones. Because the frequencies are the same, mobile phones cannot distinguish which signal is a normal base station signal, thus achieving "interference".

Noise covers traditional sounds.

When a base station attempts to connect to a mobile phone, it emits high-powered "noise" whenever there is a machine on the same frequency as the mobile phone. You will find that the signals emitted by your mobile phone are too complex to recognize, so you will refuse to communicate on your mobile phone. Early signal jammers can only block one set of frequencies, such as 2G, while complex jammers can block several types of networks at the same time, such as 2/3/4G. How is this multi-network interference achieved?

Actually, it's quite simple. In a looping manner, the interference frequency bands corresponding to the three signals are played repeatedly, covering three frequency bands at a time, and the intervals between loops are very small, so that the mobile phone has no chance to speak and can only sit quietly.

multiband signal jammer

2/3/4G are all covered, but what about Bluetooth and wifi? It doesn't matter, it can still be solved. The jammer has evolved again, adding Bluetooth and WiFi frequency bands to the scanning range, so that several common communication methods in society are completely covered. Many people do not understand the differences between Bluetooth, Wi-Fi and mobile data. They all seem to be wireless communication technologies. In fact, the main difference between them lies in the frequency band. In mobile communication technology, 2G mainly works in the 900-1700MHz frequency band, 3G works in the 1900-2100MHz frequency band, and 4G works in the 2300-2500MHz frequency band. Bluetooth and WiFi work at 2.4GHz.

The current main principles of signal shielding and signal jammers are to emit huge noise in the frequency band used by mobile phones, disrupting the normal signal reception and transmission of mobile phones. This small object is not only used to prevent cheating during exams, but is also often used in politics and the military to prevent terrorist attacks. However, signal jammers are not just like shopping for groceries. They are not just purchased and used casually, otherwise they may be illegal.

First, you need to explain to the jammer sales manufacturer the place you need to shield and the size of the range. The most important point is whether there are mobile phone signal transmission towers built by operators within three to four hundred meters. These will affect the choice of jammer. type. Find several, compare prices and qualifications, and choose the best.

How to choose the right cell phone signal jammer?

1. Shielded frequency band: Before purchasing, you need to understand which signals you want to block. Ordinary mobile phone signals (234G) can be selectively blocked. If you only block 2, 3G or only 3, 4G, this can be done before leaving the factory. adjusted. However, Texin's mobile phone signal jammer uses full-band shielding. If users need to block a certain signal, they only need to install the corresponding antenna on the machine.

2. Applicable places: Regarding the places where shielding is used, if it is used in indoor places, the shielders generally suitable for examination rooms, conference rooms, offices and other spaces are of the same type. Gas stations need to use explosion-proof and high-temperature resistant shields; if it is used in outdoor open areas, , a medium-power signal jammer is required to achieve the appropriate distance.

3. Appearance: The appearance of the signal jammer for sale can be divided into external antenna and internal antenna. Generally speaking, the external antenna has an external antenna and extends outward, so it occupies a larger space than the internal antenna. One thing; precisely because of the antenna extending outward, the effect of the external antenna is more stable.

4. Power size: Jammers can generally be divided into low power, medium power, and high power, with power ranging from 3W to 100W. When we recommend users to choose a Texin mobile phone signal jammer, it will be based on the area to be shielded.

5. Shielding range: The shielding range is directly proportional to the power. Generally, low-power signal blockers are commonly used in examination rooms. One classroom is enough to install one, and the shielding range is approximately 200 square meters; while for high-power jammers, The shielding distance can reach 300-400 meters, depending on the local field strength.

6. Volume: Generally speaking, the smaller ones are handheld and portable, relatively small in size and easy to carry; the low-power desktop ones are generally not very large, similar to a small laptop; the high-power ones are Relatively bulky, the trailer type is very large.

7. Power supply: The handheld one has a built-in lithium battery. After the power is used up, just use the power adapter to charge it; the desktop examination room uses a 220V voltage supply, and the vehicle-mounted one generally uses a 12-36V voltage supply.

5G signal jammer has many different names, signal jammer, mobile phone jammer, signal jammer, signal interference device, signal blocker, mobile phone isolator, mobile phone disconnector, mobile communication signal Jammer, signal blocker, mobile phone jammer, signal jammer, mobile phone blocker, signal blocker, mobile phone signal isolator, signal isolator, signal disconnector, wireless communication Signal jammer.

For the upstream and downstream channels of the mobile phone system, it uses memory overclocking, frequency division, frequency hopping filtering and other technologies to analyze the necessary shielding frequencies; it customizes a spherical shielding space according to the power size of the signal jammer, Automatically generate electromagnetic shielding within a specific range, making mobile phones (including PHS - PHS, GSM - China Unicom, China Mobile, CDMA - China Telecom) invalid on mobile phones in this space. When the signal jammer is in operation, it can invalidate the signal receiving and sending functions of mobile phones within a specific range, making it impossible to dial in and out, thus achieving the purpose of forcibly prohibiting use.

The basic principle of the 5G signal jammer: Within a certain frequency range, the mobile phone and the communication base station are connected through electromagnetic waves, and data and sound are transmitted at a certain serial port baud rate and deployment method.

The communication principle of the cell phone blocker is that the signal jammer transmits the low-end frequency of the wireless channel to the scanner at a certain rate during the working process. This scanner speed may cause errors in the packet signal received by the mobile phone. The mobile phone cannot detect any normal data transmitted from the base station, making the mobile phone unable to establish a connection with the base station. The main symptoms on the mobile phone include network search, poor signal, and no service system.

Before purchasing a 5G signal jammer, everyone must pay attention to some practical factors:

1. Total area of application. The shielding range of the 5G signal jammer is based on the size of the signal jammer's output power. If the shielding range is different according to the local environmental signal level during on-site testing, for example, if the signal in the room is weak, the shielding range will be larger. , outdoor accessories include GSM communication base stations, etc. So the GSM signal is shielded outdoors based on the principle of proximity!

2. Output power size. As everyone knows, 2G, 3G, 4g and 5G: before purchasing, you need to know what signal you want to block. General signals (2345G) can be blocked instead. If you only block 23G Or only block 34G. This can be adjusted before the original factory. In addition, there are also 2.4gWIFI, 5.8GWIFI and other frequency bands. Generally, ordinary signals can be blocked quickly.

3. Frequency range. Block out frequency bands: CDMA800, GSM900, SCDMA1800, DCS1800, PHS1900, TD-SCDMA (Mobile 3G), CDMA2000 (Telecom 3G), WCDMA (China Unicom 3G), etc.

The development of smart phone wireless networks has a great effect on increasing the speed of development. Mobile phones can solve network problems. Mobile phones play a more important role in people's lives, mobile communications and mobile Internet, among other aspects. Because of this, it creates a lot of problems, especially in the Internet, children are addicted to the Internet, mainly due to wifi networks. As a result, many gradually started installing mobile wifi blocker devices to block the network in order to control their children's online time.

Although wireless networks facilitate people's access to the Internet, the problems they cause cannot be ignored. It's not just a matter of access to the network, it's also a matter of network security. In order to maintain a good network environment, many places have begun to install this kind of desktop WiFi blocker to protect network security in certain places and prevent excessive use of the network. This kind of equipment has been widely used in various countries and regions around the world, and is typical representatives of schools, prisons, libraries, reading rooms and gas stations.

It is necessary to use a Wifi blocker. On the one hand, it ensures the security of the network. On the other hand, it can also control the time when children use the Internet. Don't indulge in the virtual world, which will cause serious harm to their body and mind. In addition, the radiation from the Wi-Fi transmitter will affect For human health, it is not suitable to use it for a long time. You can turn on the wifi jammer to block the wifi signal.

1. Is it inconvenient to turn it on and off uniformly?

When there are too many mobile phone signal jammers, it is difficult to turn them on and off in a centralized manner; even if the power cords are arranged uniformly, a dedicated person must be responsible for turning them on and off on time.

2. Unable to know the working status and failure of the jammer?

After all mobile phone signal jammers are activated, managers cannot immediately know whether the signal blockers at which points are working properly.

3. Is it not energy-saving, environmentally friendly and not conducive to equipment maintenance?

Generally speaking, all jammers are turned on all year round, which is not conducive to energy saving, environmental protection, equipment maintenance, and shortens the service life of equipment (factory areas, canteens, warehouses, etc. are unmanned at night, so there is no need to leave these locations The mobile phone jammer is turned on and runs continuously 24 hours a day);

4. Inconvenient for group control or point-to-point control?

It is impossible to perform precise timing switch control in arbitrary groups or point-to-point.

5. Can't the phenomenon of intentional damage to the jammer be prevented?

For intentional damage, power cut, etc. that affect the normal operation of the mobile phone jammer, the management personnel cannot immediately determine and know

6. The process of manually closing the jammer cannot be traced and investigated?

It is impossible to know which blocker has been maliciously turned off.

7. Can’t find the manufacturer for repair after the jammer is broken?

Are you angry that your jammer is broken and there is nowhere to repair it?

8. There are base stations around and the shielding is not complete?

There are base stations nearby that cannot be completely blocked, or affect the base station signal being notified?

9. Are large conference rooms still using multiple small jammers for regional shielding, causing budget overruns?

A large conference room of 1,000 square meters is shielded by small jammers in different areas, resulting in budget overruns?

1. What is a GPS jammer?

The GPS signal jamming system is designed to suppress the signals of the global satellite navigation GPS system in the 1500-1600MHz range. Jammers make it impossible for GPS satellites to monitor the location of cars and all vehicles via GPS, and gps jammer devices will not interfere with cell phones and other devices. The GPS jammer range can be from 5 to 15 meters, which is enough for cars and buses as the trackers are usually installed in the cab inside the car. After initiating the connection via the car's cigarette lighter, the device starts working immediately and generates radio noise (interference) in the range 1500-1600 MHz (L1/L2) within a radius of 15 meters.

2, there are different types of GPS jammers.

The GPS positioning and navigation system only requires a GPS jammer.

Dual-mode navigation: network positioning (mobile phone signal positioning) navigation + GPS navigation. For this kind of navigation you need GSM GPS jammer.

Network positioning (mobile phone signal positioning) navigation. For this you need a gsm jammer.

COMPASS system, GLONASS system and Galileo system.

These three systems are rarely used in civilian applications.

3. Car GPS Jammer

GPS devices all require a phone card. The current location information calculated by the GPS module is uploaded to the positioning server by the communication base station through this card for user query. The jammer uses radio electromagnetic waves to interfere with the connection between the card and the communication base station to achieve The GPS location cannot be queried by the user.

4. Working principle of GPS jammer:

Mainly by releasing radio interference waves, it can invalidate the GPS locator within the specified electromagnetic band, forming the same electromagnetic environment as the device, thereby blocking the signal.

Two methods to block GPS signal. First: The direct method is to remove the two cables of the GPS host. Second: Go to the electronics market to buy a GPS signal jammer, but first understand what signal tracking method the GPS in your car uses.

There are only two signal tracking methods: (1) Cell phone signal. (2) Direct satellite tracking signal.

Generally, most GPS tracking signals use mobile phone signals. GPS jammers can also interfere with car navigation. GPS used in car navigation is the same as mobile phone signals. It is easily interfered by electronic devices. The signal jammer can block the signals within a certain range. The signals are blocked, causing all communication devices within range to lose signals. However, such equipment also has disadvantages for the user. The signal jammer can only be turned on temporarily and cannot be turned on forever. As long as he turns off the jammer, the GPS signal will be available again.

Many schools have been very busy recently, because the days for the college entrance examination are counting down day by day, and they are working non-stop to prepare the materials and machines needed for the examination room. This is to allow candidates to take the examination in a stable and orderly environment.

This is also the responsibility of the school. So recently we can see that a kind of machine has been installed in the examination room. This is the examination signal blocker that has been vigorously promoted by many schools recently. It is an effective countermeasure against electronic signal cheating. Although it is so It is effective, but what is not known is that when it is actually put into use, its effect will be different depending on the installation place and situation.

Although the shielding range we see can be found in the instructions provided with the test signal jammer, this data is laboratory data and is for reference only. Actual use depends on different situations. First of all, whether there is a base station within 500 meters nearby is one of the reasons that affects the shielding range, and the impact is different depending on the distance.

This should be noted. Secondly, the test cell phone signal jammer cannot penetrate the wall. This will cause its shielding effect to be greatly reduced, and metal objects will also affect its shielding effect. Although these problems will affect the effectiveness of the test signal jammer, it is still the most effective helper in eliminating electronic cheating methods.

1. The antenna equipment is not tightened

If the antenna equipment is not tightened, the temporary phenomenon that occurs is that the occurrence of some frequencies cannot be blocked. If this symptom occurs during on-site installation, please first check whether the antenna equipment is tightened.

(1) Details of tightening the antenna: Since the antenna is composed of two parts of the activity (1 is the short connector; 2 is the antenna pole), you must hold the lower part of the antenna short connector tightly during installation. Tighten and screw on.

(2) Wrong antenna insertion: Each product currently has 4 wireless antennas, namely 800MHZ (China Unicom); 900MHZ (Mobile); 1800MHZ (Big Smartphone); 1900MHZ (Little Smart Phone) 4 types of wireless antennas, each antenna It must be consistent with the corresponding frequency socket on the server, and cannot be plugged in wrongly.

2. The best height-to-width ratio for installation is 1.7---1.8 meters long.

This distance is the height of the cell phone jammer from the ground. This distance has a better shielding effect in the classroom.

3. The power plug connector has poor contact.

When connecting the cell phone signal jammer to the power plug, be sure to find the matching slot and do not force rough operation. In addition, if the power supply contact is poor at the installation site, the symptom is: the indicator light (green light) of the mobile phone signal jammer does not light up. To solve the problem of poor contact of the power plug on site: it is recommended to add a gasket to the power supply connector.

4. The switch power light does not light up:

There may be three reasons for this situation:

(1) Poor contact of the power plug

(2) The diode indicator light is broken

(3) The power supply itself is broken. The criterion for identification is whether the green light of the power supply is on. If it is not on, the power supply itself is broken.

5. The signal jammer may not block some signals. The reasons may be as follows:

(1) Antenna matching is incorrect

(2) The antenna socket is not tightened

(3) The signal displayed on the screen of the mobile phone is a false signal (this phenomenon mainly occurs on Samsung and Tianyu mobile phones). In fact, the signal has been blocked.

(4) There may be a problem with your own signal blocker.

There are many kinds of cell phone signal jammers on the market, and there are also various machines. Prices also vary. Maybe you may have purchased a cheap machine on a certain platform, but it was useless in actual use. In fact, when buying a mobile phone signal jammer, you don't have to care about its price, because the main buyer must buy it if it is useful. Otherwise, even if the useless machine is cheap, it will have no practical effect for consumers to buy it. When choosing a cell phone signal jammer, just make sure it is what you are going to use it for. Tell Honghu Communications’ professional cell phone signal jammer sales specialist your requirements and he will introduce them to you one by one. Recommend suitable styles to you so that you don’t fall into any trap.

1. Ordinary mobile phone signal blocking

The technical characteristics of ordinary mobile phone signal shielding are mainly based on the shielding principle, using a large number of low-power or high-power devices to fight, and staying on simple technical solutions.

Ordinary signal blockers for phone are far lower than high-quality mobile phone signal jammers in terms of price, quality, or work efficiency, because their parts cost is also low. Especially temperature control. Ordinary mobile phone signal jammers basically have no temperature control technology. Under poor heat dissipation, ordinary mobile phone signal jammers will not reduce the power to maintain their own problems, causing the machine to crash or spontaneously ignite. . Therefore, it is really not recommended for everyone to use ordinary mobile phone signal transmitters. Even the price is favorable. It is not recommended for consumers to use

2. Shielded by high-quality mobile phone signal jammer.

The technical characteristics of high-quality mobile phone signal jammers are the use of strong signal digital point frequency hopping technology, which reduces radiation 150 times compared to ordinary shielding technology; it is mainly based on outdoor shielding, reducing indoor radiation power hundreds of times; it adopts multi-channel combining technology, The full-frequency antenna replaces N divided-frequency antennas, which is suitable for wireless remote control and lays the foundation for distributed antennas. It adopts distributed antenna technology to reasonably allocate shielding power, disperse the power signal, reduce antenna radiation, provide dozens of times of efficiency, and at the same time eliminate Dead spots and leakage points; the unique TD synchronization technology only blocks downlink pilot time slots for China Mobile's 3G (TD-SCDMA) and 4G (TD-LTE) networks, eliminating signal source shielding and obtaining mobile and radio management Commission approval while reducing radiation dozens of times.

Ordinary mobile phone signal jammers are far lower than high-quality mobile phone signal jammers in terms of price, quality, or work efficiency, because their parts cost is also low. Especially temperature control. Ordinary mobile phone signal jammers basically have no temperature control technology. Under poor heat dissipation, ordinary mobile phone signal jammers will not reduce the power to maintain their own problems, causing the machine to crash or spontaneously ignite. . Therefore, it is really not recommended for everyone to use ordinary mobile phone signal transmitters. Even the price is favorable. It is not recommended for consumers to use

High-quality mobile phone signal jammers are far better in quality than ordinary mobile phone signal jammers. After all, in terms of workmanship and parts, high-quality chips are used for installation. It can also work in harsh environments for a long time. The temperature control part is also quite stable. When the machine reaches a certain temperature, Jinyuda's mobile phone signal jammer. It will automatically reduce the power to ensure that the machine does not burn out and also ensures the operation of the machine. Moreover, high-quality mobile phone signal jammers use gain antennas whether they are built-in antennas or external antennas. The coverage is also greatly improved.

Therefore, consumers should be rational and reasonable in choosing a machine for the right location, rather than giving priority to the price of a mobile phone signal jammer.

The emergence of signals can be said to have brought a lot of convenience, but sometimes in order to prevent the negative effects of signals, cell phone signal jammers are often used in examination rooms to block signals so that students cannot use mobile phones to cheat. Use it What are the precautions?

1. The antenna and other accessories are installed correctly;

2. To ensure sufficient power, the handheld indicator light turns yellow or red to indicate that the power supply is down, and the shielding effect of the mobile phone signal jammer is not as good as usual;

3. The mobile base station is more than 200 meters away;

4. The shielding effect depends on the surrounding environment. The interference effect of mobile phones used in suburbs is better than that in cities. Due to the higher density of mobile base stations in cities and the close distance between base stations, the signals emitted by urban mobile base stations are many times stronger than those in suburbs;

5. When using a signal blocker, there should not be any metal objects or wall obstructions around the antenna and between the jammer and the phone to block signal transmission;

6. Strong magnetic field and strong electromagnetic wave environment will affect the interference effect of use;

7. The installation height of the mobile phone signal jammer should be as high as possible at the same level as the device you want to block;

8. Long-term use of interference opportunities will cause high heat and affect the interference radius;

9. When the phone is on a call, the jammer does not easily block the signal;

10. It is normal for the radio waves emitted by the jammer to accumulate and cause the machine to heat up;

11. There is a lag in the refresh of the signal display grid on the mobile phone. Interference may have been turned on but the mobile phone still displays the signal status;

12. To test the function of the GPS jammer, please download the GPS signal detection software to test the shielding effect, or open the car navigation function test;

13. The wifi jammer device with WIFI jamming function will also block other appliances with WIFI.

Although mobile phone signal jammers are easy to use and can identify mobile phone signals and general frequencies, we should also pay attention to the points listed above to truly make full use of them and not abuse them. Stay away from electronic products during normal use.