topsignaljammer's blog
In what kind of environment can cell phone signal jammers be installed to achieve better results? Why do sometimes installed signal jammers not work, or have poor results? In fact, this boils down to the surrounding environment where you use the signal jammer. In terms of installation technology, the following factors must be considered when using signal jammers:
The comprehensive factors for indoor shielding include:
1. Consider the lateral application field space in the area that needs to be shielded;
2. The floor height of the shielding area calculated from the air or the vertical height perpendicular to the ground;
3. What needs to be considered is the blocking effect of house decoration materials and building materials themselves;
4. What needs to be considered is whether source signal enhancement measures or secondary amplification have been adopted indoors;
5. What needs to be considered is the proportion of indoor metals and non-metals;
6. It is necessary to know whether the transmitting frequency of wireless devices already existing in the room will cause same-frequency mutual interference;
7. It is necessary to consider the ability of existing indoor precision instruments and equipment to resist inter-frequency interference and the safe distance;
8. What needs to be considered is the partition status and orientation of the windows, doors and windows of the house;
Comprehensive factors for outdoor shielding:
1. Before installing equipment in open spaces and non-open spaces, you should consider:
1. When the repeater emits strong electromagnetic wave signals horizontally and vertically, it will affect the shielding device;
2. The influence of the signal jammer for sale on the repeater signal during the interval time and the antenna selection can be affected by the antenna selection;
4. Separating walls and debris block the repeater from transmitting signals;
5. The blocking effect of stray objects and non-moving solid barriers on the radio wave of the shielder;
The cell phone signal jammer is a new type of information security product that uses specific electromagnetic signals to form a shielding network so that mobile phones cannot receive data from the base station in places that need protection, nor can they connect to the base station. Please note the following four points about signal shielding:
What should I do before installing a cell phone signal jammer?
1. Before installing the equipment, the antenna must be installed correctly according to the signs, and then connected to the power supply to prevent the machine from burning out.
2. Before installing the equipment, you should know the location of the base station and position the shielding cover toward the base station as much as possible.
3. When installing the equipment, pay attention to whether there are metal objects within 1 meter around the machine to prevent signal reflections from affecting the shielding effect.
4. Hearing aids should be installed in special environments such as gas stations and gas stations.
5. The height of the device is 1.8-2 meters. It can be placed directly on the table or wall, or it can be installed on the ceiling. The antenna is perpendicular to the ground, making it easy to use.
6. In indoor equipment, attention should be paid to whether the transmission frequency of wireless equipment will cause co-channel interference.
7. The anti-interference ability and safe distance of existing indoor precision instruments must be considered.
8. If there are signal-enhanced telecommunications machines indoors, it is not advisable to install shielding.
9. Fully understand the boundaries of the shielded area and the unshielded area.
Conduct a site visit after installing a cell phone signal jammer for sale.
1. Understanding the strength of the on-site signal is crucial for shielding equipment. Various signals have different signal strengths due to their different environments. The on-site signal strength can be designed to be shielded by the equipment.
2. If the device is not detected, you need to know the situation of the base stations around the device address, how far the visual distance is, which base stations (China Mobile, China Unicom, CDMA, 3G, 4G, 5G, etc.) and where the antenna direction of the base station is pointing. Generally, base stations in cities are mostly built on the roofs of high-rise buildings, while towers are often built in suburbs or villages.
3. If you have survey equipment, you only need to record the signal strength at various points indoors and outdoors.
There are all kinds of cell phone jammer and all kinds of machines on the market. Prices are also unstable. Maybe you've bought a cheap machine on a platform, but it actually didn't work. When buying mobile phone signal shielding, you can't care about the price, because buyers are useful. Otherwise, even if a useless machine is cheap, consumers will have no actual effect. When choosing mobile phone signal shielding, you know what aspects you need to use. You can tell our company's expert who specializes in selling mobile phone signal shielding and he will introduce it to you one by one. Recommend suitable styles to you so that you won’t step into any trap.
Mobile phone signal blocking can generally be divided into two categories.
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 equipment to fight, and staying in a simple technical solution.
Ordinary mobile phone signal shields are nowhere near as expensive, quality, or efficient as high-quality mobile phone signal shields because their cost is there too. Especially temperature control. Ordinary mobile phone signal shielding basically does not have temperature control technology. Under poor heat dissipation conditions, ordinary mobile phone signal shielding will not automatically reduce the power to maintain, causing the machine to crash or spontaneously ignite. Therefore, ordinary mobile phone signal transmitters are really not recommended for everyone to use. Even the price is cheap. It is also not recommended for use by consumers.
2. High-quality mobile phone signal shielding.
The technical characteristics of high-quality mobile phone signal shielding are the use of strong signal digital point frequency hopping technology, which is 150 times lower than ordinary shielding technology; mainly outdoor shielding, which reduces indoor radiation power by hundreds of times; the use of multi-channel combining technology, all-round The frequency antenna replaces N frequency division antennas and is suitable for distributed antennas of wireless antennas; it uses distributed antenna technology to reasonably distribute shielding power and reduce antenna radiation by dozens of times; it uses 4G network and multi-channel combining technology to effectively reduce the number of antenna radiation ten times.
Ordinary mobile phone signal shields are nowhere near as expensive, quality, or efficient as high-quality signal jammers because their cost is there too. Especially temperature control. Ordinary mobile phone signal shielding basically does not have temperature control technology. Under poor heat dissipation conditions, ordinary mobile phone signal shielding will not automatically reduce the power to maintain, causing the machine to crash or spontaneously ignite. Therefore, ordinary mobile phone signal transmitters are really not recommended for everyone to use. Even the price is cheap. It is also not recommended for use by consumers.
High-quality mobile phone signal shielding is far superior in quality to ordinary mobile phone signal shielding. At the end of the day, the parts are installed using quality chips. And can work for a long time in harsh environments. The temperature control is also very stable. When the machine reaches a certain temperature, the Jinyuda mobile phone signal screen will turn on. It can automatically reduce the power to ensure that the machine will not burn out and at the same time ensure the operation of the machine. Moreover, high-quality mobile phone signal shielding uses gain antennas whether it is a built-in antenna or an external antenna. Coverage has also been greatly improved.
The cell phone signal jammer sends the signal to the same frequency device. If the shielding device is turned on, when the mobile phone signal is disabled, the interference part will be successful. Nowadays, there are more and more mobile phone users, so mobile phone signal jammers are more civilian than electronic devices. It is prohibited to use mobile phone signals to interfere with specific locations.
The mobile phone signal jammer is an instrument used to protect mobile phones from receiving signals. The mobile phone signal jammer plays signals with the same frequency to the GSM modem. If the mobile phone signal jammer is disabled, the interference will be successful.
Cellular phones are full-duplex devices that can use two frequencies at the same time, one for speaking and one for listening, and process the signals simultaneously. If there is signal blocking, only one frequency can be blocked at a time. Because mobile phones can only access one of the frequencies, both frequencies are blocked because they think there is no service in this area.
The principle of disrupting cell phones is similar to how 3G interferes with other types of radio communications. In order to use a cell phone, signals are sent from the cell phone to the cell phone tower. There are several cell towers in a city, and cell phone users move from one tower to another as they move through an area.
A signal blocker emits the same radio frequency as a cell phone, interrupting communications between the cell phone and the base station in the tower by denying radio signals to users in the area covered by the jamming device, also known as a denial-of-service attack.
There are different types of mobile phone signal shielding currently on the market. Some devices can only block a single frequency, while others can block all types of networks at the same time. The latter can automatically switch to a model that looks for open signals from different networks. High-end devices can block at the same time. Full frequency, other devices can be adjusted to specific frequencies.
Simply put, they emit random static or noise over a wide frequency range that is so powerful that approaching devices cannot connect where it is supposed to. It's a bit like being next to the engine of a sports car, opening the hood, and trying to talk to someone on the phone. The localized noise becomes so strong that the device cannot make regular connections. They effectively prevent equipment from functioning properly to quickly cover a range of frequencies.
The carrier frequency of the electromagnetic interference signal is the same as the carrier frequency, so the receiver and amplifier solve (subtract) the interference signal and the interference signal at the receiving end at the same time.
When we are doing cell phone signal jammer coverage projects, customers often ask us what kind of environment can we assemble an effective mobile phone signal jammer. Why are mobile phone signal jammers used in some places ineffective, or the effect is relatively poor? What's the difference? In fact, this will ultimately be related to the surrounding environment, installation location, distance and quantity of the mobile phone signal jammer you use.
The mobile phone signal jammer manufacturer explains to you under what circumstances the effect of installing a mobile phone signal jammer is relatively poor?
1. There was no data analysis, plane survey, shielding coverage plan and other work in the early stage, resulting in no effect after blind installation, poor shielding effect, etc. (Before installing the shield, contact the professional customer service of Topsignaljammer Shield for consultation, and give Please refer to professional installation advice before purchasing a shield suitable for your own location).
From the above information, we can understand that the operator we use is China Mobile. The frequency band is LTE2600MHZ and the signal strength of the environment is -86DB (the larger the data, the worse the information. It is generally recommended that the mobile phone signal jammer be installed at a position with a field strength above -86. Normal use) If the test data of the mobile card or China Unicom card you use is China Mobile or China Unicom data, the test signal strength needs to be tested separately by the four cards of China Mobile, China Unicom, China Telecom, Radio and Television to be more accurate. Screenshot the professional information to the manufacturer and give it based on data analysis. Professional installation solution suggestions
Do many manufacturers tell you that we all have four-network 2G.3G.4G.5G.WIFI signals fully shielded when leaving the factory? In fact, WiFi is transmitted in many segments. Without testing or checking the professional frequency band technical parameters given by the manufacturer, it cannot be completely shielded. WiFi is divided into three segments (2.4G+5.2G+5.8G) with a bandwidth of several hundred megabits. This is why many customers It is said that although there is WiFi signal shielding, you can still connect to WiFi and watch videos online normally when used on site. Unprofessional manufacturers will generally express that they cannot recommend a better one to you. Topsignaljammer only recommends the right ones and not the expensive ones. .
Many factories tell you that jammers have different shielding distances based on different signal strengths. We can use the software to check whether there are base stations near the place where you use the mobile phone signal jammer, how many base stations there are, etc.
Information, using mobile base stations or China Unicom base stations, telecommunications base stations, etc. Our signal jammer factory can make adjustments based on the information frequencies of nearby base stations to enhance the signal strength of the base stations so as to be effective.
Shielding can be customized one-on-one. Other factories use unified debugging and cannot change it, resulting in poor shielding effect and intermittent use of mobile phones.
2. The installation height does not meet the requirements, the installation position is improper (there are obstructions), and the use of partition walls causes signal obstruction.
3. Environmental factors. There is a base station 200-500 meters away from the location where the mobile phone signal jammer is installed, causing the shielding to fail.
The shielding distance of the device has a great relationship with the power of the device and the use environment. There are several aspects that are helpful to the shielding effect: first, the output power of the device, second, the working mode of the shield, and third, the use environment (indoor or outdoor), The fourth is to shield the interference intensity of the surrounding environment.
Nowadays, mobile phones all use digital signals, and digital signals have strong anti-interference capabilities. Generally, the effect of using analog signal technology to interfere with digital signals is poor, so digital signals must be used to interfere with digital signals. Digital interference signals and analog interference signals of the same power have a negative impact on mobile phones. The interference effects are quite different. Jammers using digital jamming signal technology have lower power and higher efficiency than signal jammers using analog signal jamming technology.
The analysis of synthesis, attenuation, and reflection of indoor mobile phone signals and interference signals is very complex. Before shielding, the strength and quality of local mobile phone signals have a great impact on shielding. Different mobile phones have different effects. Generally, mobile phones with strong ability to receive weak signals may not necessarily have good anti-interference effects.
The direction of the base station and the direction of the mobile phone shielding area also affects the shielding effect. Generally, the signal strength in space is about -60 to -70dbm, and it can reach about -40dbm within a few hundred meters of the base station. The mobile phone reception strength range is generally between -35 to -95dbm. The higher the signal power strength of space mobile phones, the shorter the shielding distance.
The above is a conclusion based on the rules of radio signal transmission in free space. In reality, there are many obstacles on the ground that affect radio wave transmission. The above can only be used as a qualitative reference. Especially indoors, the above rules are very different from the actual situation. Therefore, this problem is difficult to calculate accurately at the moment and can only be determined based on the actual situation on site. Accurate construction projects must conduct preliminary research and signal testing, and then design specific solutions. In the later stage, timely tracking and testing are required, and certain corresponding supplements must be made to be foolproof, that is, to achieve a strict shielding effect.
The shielding distance of the device has a great relationship with the power of the device and the use environment. There are several aspects that are helpful to the shielding effect: first, the output power of the device, second, the working mode of the shield, and third, the use environment (indoor or outdoor), The fourth is to shield the interference intensity of the surrounding environment.
Nowadays, mobile phones all use digital signals, and digital signals have strong anti-interference capabilities. Generally, the effect of using analog signal technology to interfere with digital signals is poor, so digital signals must be used to interfere with digital signals. Digital interference signals and analog interference signals of the same power have a negative impact on mobile phones. The interference effects are quite different. Jammers using digital jamming signal technology have lower power and higher efficiency than signal jammers using analog signal jamming technology.
The analysis of synthesis, attenuation, and reflection of indoor mobile phone signals and interference signals is very complex. Before shielding, the strength and quality of local mobile phone signals have a great impact on shielding. Different mobile phones have different effects. Generally, mobile phones with strong ability to receive weak signals may not necessarily have good anti-interference effects.
The direction of the base station and the direction of the mobile phone shielding area also affects the shielding effect. Generally, the signal strength in space is about -60 to -70dbm, and it can reach about -40dbm within a few hundred meters of the base station. The mobile phone reception strength range is generally between -35 to -95dbm. The higher the signal power strength of space mobile phones, the shorter the shielding distance.
The above is a conclusion based on the rules of radio signal transmission in free space. In reality, there are many obstacles on the ground that affect radio wave transmission. The above can only be used as a qualitative reference. Especially indoors, the above rules are very different from the actual situation. Therefore, this problem is difficult to calculate accurately at the moment and can only be determined based on the actual situation on site. Accurate construction projects must conduct preliminary research and signal testing, and then design specific solutions. In the later stage, timely tracking and testing are required, and certain corresponding supplements must be made to be foolproof, that is, to achieve a strict shielding effect.
Install using:
1. Make sure the antenna and other accessories of the signal jammer for sale are installed correctly;
2. Ensure that the mobile base station is more than 200 meters away;
3. The shielding effect depends on the surrounding environment. The interference effect of mobile phones used in suburbs is better than that in cities, because the density of mobile base stations in cities is larger and the distance between base stations is closer, causing the signals emitted by urban mobile base stations (where the jammer needs to be blocked) to be stronger than in the suburbs. multiple times;
4. When using a jammer, there should not be any metal objects or wall obstructions around the antenna to block signal transmission;
5. The strong magnetic field of the signal and the strong electromagnetic wave environment will affect the interference effect;
6. The installation height of the jammer should be as high as possible and at the same level as the device you want to shield;
7. Long-term use of the shield will cause high heat and affect the interference radius;
8. When the phone is on a call, the jammer does not easily block the signal (the signal is very strong during the call);
9. The radio wave emitted by the shield is a high-energy material. It is normal for the high-energy material to accumulate and cause the machine to heat up;
10. The signal on the mobile phone indicates that there is a certain lag in the refresh of the grid. You may have turned on the jammer but the mobile phone still displays the signal condition, but in fact the mobile phone cannot be used. Please follow the actual effect;
11. To test the function of the GPS jammer, please download the GPS signal detection software to test the shielding effect, or turn on the car navigation function to test;
12. WIFI jammer devices with WIFI interference function will also block other appliances with WIFI, such as wireless microphones, speakers, monitors, etc. Please be careful to stay away from these wireless devices when using them.
Maintenance:
1. When the shield is not in use, it should be stored in a dry and ventilated place to avoid long-term exposure to salt spray and harmful gases. Signal blocker;
2. When the jammer is working, do not put other objects on it or disassemble the antenna, so as not to affect the effect of the jammer and damage the host;
3. Mobile phone signal shielding antenna with external antenna - it cannot be screwed wrongly, it must be screwed up according to the frequency;
4. The mobile phone signal jammer should be installed away from high temperature and humid places. When using the jammer outdoors, pay attention to waterproofing;
5. Do not use a completely sealed box to cover the outside of the mobile phone signal jammer in order to hide it. This will affect heat dissipation and cause damage to the machine;
6. The antenna must be installed on the jammer and then connected to the power supply;
7. The shield should be placed in a well-ventilated place, try to avoid large objects, strong heat sources and strong electromagnetic sources to maintain the shield effect and work for a long time;
8. If the power supply of the mobile phone signal jammer is not industrial grade, remember not to turn it off 24 hours a day, as this will shorten the life of the power supply and the machine;
9. When wiping the surface of the shielder, avoid using chemical solvents and avoid water entering the machine;
Looking at ancient and modern times, at home and abroad, cheating has occurred in all examinations in the past. It is just that as skills improve, the methods of cheating are constantly updated and changed. Nowadays, with the development of technology, more and more people use mobile phones to cheat, which has become an issue that examination management departments pay more and more attention to. Cell phone signal jammers are currently a proactive preventive measure in major examination centers.
Mobile phones have indeed brought convenience to people's lives, but as the mobile phones remain with us, a lot of inconveniences have gradually emerged. Schools do not allow cheating during exams. With the emergence of mobile phones, students have begun to learn to use mobile phones to cheat, but what should they do if they cannot completely eliminate the existence of mobile phones? Gas stations are also places where mobile phones are not allowed and safety accidents may occur, but what should we do if we cannot completely restrict customers? What should I do if my cell phone ringtones are most taboo during a conference or forum lecture and I can’t confiscate them all? It can be seen that mobile phones are not only beneficial, but also add a lot of troubles to people's lives. At this time, I need a machine that can block mobile phone signals, that is, a signal blocker for phone.
The special "mobile phone signal jammer" for the examination room is a high-tech product that can actively prevent cheating cases in the examination room. The working principle of the mobile phone signal jammer specifically for examination rooms currently seen on the market is as follows: when the machine is working, a spherical invisible electric fence with a diameter of about 40 meters is formed around it. The mobile phone signal is in a vacuum, that is, the mobile phone cannot receive external signals and cannot send signals to the outside. At this time, all mobile phones placed in the electric fence are in a malfunctioning state, and the prompt tone of the mobile phone when making an external call is "· Temporarily unavailable.
The blocking frequency of the special mobile phone signal jammer in the examination room is: (1)869 - 894 MHz (2)925 - 960 MHz
(3)1780 ― 1920 MHz (4)2010 ― 2145 MHz (5)2300 ― 2485MHz
(6)2515 — 2675MHz (7)3400 — 3600MHz (8)4800 — 4900MHz
(9)5125 — 5350MHz (10)5725 — 5850MHz
Its frequency bands are: CDMA800, GSM900, SCDMA1800, DCS1800, PHS1900, TD-SCDMA (Mobile 3G), CDMA2000 (Telecom 3G), WCDMA (China Unicom 3G), 4G, 5G, 2.4G (WIFI), 5.8G (WIFI)
Its characteristic is that it only blocks all types of mobile phone signals and does not affect any electronic devices. In particular, the radio will not affect the English listening test.
Comparison between the application of "examination room special mobile phone signal jammer" and other preventive measures in the examination room
1. "Mobile phone signal jammer" is an active preventive measure: "Other preventive measures" are passive preventive measures.
2. "Mobile phone signal jammer" can actively control all mobile phones entering the examination room and prevent them from being used normally: "Other preventive measures" only monitor the use of mobile phones.
3. Cell phone signal jammer” is to force the cheater to stop; “Other preventive measures” is to catch the cheater on the spot.
5G signal jammers are built to block the working of communication equipment. The device uses the frequency at which the mobile phone operates, so it cannot affect the use of the mobile phone by receiving signals from the base station. If you want to disable the normal functions of your mobile phone, just install a mobile phone signal jammer, and the mobile phone will stop accepting calls and messages within a certain period of time.
A cell phone signal jammer is a unique device. It will assist you against 5g, UMTS, CDMA, GMS, PHS internet. You can carry a cell phone text jammer with you because it's compact and easy to hide. The built-in rechargeable battery allows you to use the text signal jammer on your phone for 5 hours. The device has an antenna through which you can adjust the blocking radius. This mobile phone signal jammer is safe because it has no radiation source and will not harm human health.
The 5G signal jammer is useful for everyone because it is a smart device. For example, cell phone signal jammers are particularly suitable for colleges and universities. If the teacher turns on the cell phone jammer in the classroom, using the cell phone jammer can ensure that cheating will not occur during the exam. Students' cell phones will be blocked from working and they will not be able to receive information about the answers. In addition, mobile phone signal jammers can help bosses control employees' work. As a result, your employees are less likely to be distracted by work information.
So, where can 5G signal jammers be used? The application fields of mobile phone signal jammers are still very wide. Some confidential organizations, government agencies, universities, etc. can learn more about them in detail.
1. Various large, medium and small examinations
Fairness and fairness are the fundamental rules of social development, and life requires facing many exams, ranging from elementary school to junior high school, junior high school to high school, and as large as this year's college entrance examination, civil servant recruitment and other level exams. In order to better prevent students from cheating, in various large and medium-sized examinations, mobile phone signal jammers and other methods must be used to block the signals in the examination room, so as to achieve the goal of being unable to communicate with mobile phones. Online requirements can also be a good way to guard against students' cheating practices.
2. Government agencies and enterprises
Government agencies, enterprises, etc. also have requirements for 5G signal jammers. The frequency of reporting work by government agencies, enterprises, etc. can be said to be very high. In order to allow participants to focus more on the conference and further promote the learning and training spirit of the conference, it is also necessary to pay attention to the use of mobile phones. When leading cadres report on their work, they turn on the mobile phone signal jammer to block the data signal. The leading cadres talk happily and the people below listen attentively.
3. National defense areas, cells, and detention centers
In some areas that require strict control, such as military bases, prisons, detention centers, etc., the level of confidentiality is very high, and mobile phones should be strictly supervised. In areas such as national defense areas, prison cells, and detention centers, shielding data signals can greatly prevent the possibility of leakage.
In addition to the three major types of 5G signal jammers described above, in other areas where phone calls are strictly prohibited, such as gas stations, petrochemical plants, hospitals, etc., the effect of installing mobile phone signal jammers is also very ideal.
