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Mobile phone jammers can not only interfere with mobile phone signals, but also interfere with radio signals in other frequency bands by adding interference modules of different bands. Everyone knows that radio signals can achieve different functions according to the different frequencies used, including GPS, WiFi, etc. Because of the differences in radio technology and standards, as well as the differences in signal strength emitted by the signal transmitter of the radio signal, the interference range of mobile phone jammers will be different when interfering with these radio signals.

At present, the signal frequency that can be used by domestic mobile phones ranges from 700M to about 6000M, including signals from mobile phone operators, WiFi signals, GPS signals, etc. According to the different types of signals, they are divided into various uses, and the functions achieved are also different.

The interference range of mobile phone jammers for mobile phone signals of different frequency bands is also different. In the same test environment, the strength of mobile phone signals of each frequency band cannot be the same. However, mobile phones can receive mobile phone signals of multiple frequency bands at the same time according to different operators to ensure that the mobile phone can be used normally. At this time, it is necessary to test the frequency band of the strongest mobile phone signal on site, and then adjust the mobile phone jammer or adjust the signal source, and then cover the mobile phone frequency band with the strongest signal on site. Then, it can be basically determined that this mobile phone jammer can interfere with the ability of all mobile phone signals on site.

In certain cases, the above solutions are relatively expensive. In order to save costs and pursue higher cost-effectiveness, the following solutions can be considered

Find the stronger frequency bands on site, and then equip high-power interference modules to carry out targeted interference on these strong signal frequency bands, so as to reduce costs and achieve the purpose of interference effect.

As the name suggests, the cell phone signal jammer is a professional device that can interfere with mobile phone signals. It is used in many places, such as school examination rooms, libraries, courts and hospitals, etc. So how to use the jammer better? Here is a brief introduction.

The use of the mobile phone signal jammer is relatively simple. First, select an area where the mobile phone signal needs to be interfered, and then place the jammer in a suitable position in this area, which can be on the wall or on the desktop; then you can connect the power supply to conduct a pre-installation test, and after the test is completed, you can install it. It can be fixed on the wall or placed in the ceiling. After installation, it can be powered on and used; at this time, all mobile phones on the scene are in the network state of searching, and it has lost the signal of the base station. Whether it is the caller or the called party, it cannot establish a call connection.

The interference range of the mobile phone signal jammer is mainly related to the electromagnetic signal field strength at the site of use, and also to the distance from the site of use to the communication base station. If there is no base station within 300 meters around the site, the interference range will be larger and the interference effect will be better.

Some friends are worried that the radiation from mobile phone signal jammers is harmful to the human body. In fact, any electronic product will generate some electromagnetic radiation to a greater or lesser extent. The country has strict national standards for electromagnetic radiation. As long as the radiation value of the equipment is below the national standard, it can be determined that the electromagnetic radiation generated by the equipment is safe and harmless to the human body. The radiation value generated by mobile phone signal jammers is lower than the national standard, and the human body is not exposed to electromagnetic radiation at close range for a long time, so it is not harmful to the human body. It can be said that there is almost no harm.

The above is about the use of cell phone signal jammers and the issues that the public is more concerned about. When using the jammer, you can follow the above method to operate. You only need to install and connect it, plug in the power supply and you can use it. When using it, you also need to choose a suitable location so that you can achieve a better interference effect.

There is no need to worry about radiation hazards when using cell phone jammers. Like mobile phones, the signals emitted by mobile phone jammers do have certain electromagnetic radiation. The working principle of the jammer is similar to that of mobile phones. For example, the chip it uses is the same as that of mobile phones, and it also emits electromagnetic signals. Therefore, it will also generate certain electromagnetic radiation like mobile phones.

Will all intensities of electromagnetic radiation harm human health? The degree of harm to the human body caused by mobile phone jammers cannot be cut off in one size fits all. It is related to the length of time the machine is turned on and personal physique. In fact, the national safety value of electromagnetic radiation intensity also has national standards. The national standard mentioned here is the public exposure derived limit of the "Electromagnetic Environment Control Limits" (GB8702-2014) updated by the State Environmental Protection Administration in 2014. This national standard stipulates the maximum limit of the safety value of electromagnetic radiation exposure, and the average value of the electromagnetic radiation exposure field strength of the public cannot be greater than 0.4W/㎡.

The mobile phone jammers produced by regular companies with production licenses are strictly tested by the environmental testing department, and the radiation intensity is below the maximum limit specified in the "Electromagnetic Environment Control Limits" (GB8702-2014). In this way, it can be understood that the radiation value of the mobile phone jammers produced is safe for the human body.

The transmission power of mobile phone signal jammers suitable for smaller spaces such as classrooms, examination rooms, and conference rooms is relatively small, and there are strict regulations on the installation location and installation height. For example, above the blackboard in the classroom and on the wall of the conference room, the straight-line distance from the cell phone signal jammer to the human body is usually more than 2 meters, which has reduced the harm of the electromagnetic radiation of the mobile phone signal jammer to the human body to below the safe value.

For high-power mobile phone jammers with a transmission power of more than 50W for the interference module, the electromagnetic radiation value is relatively high. When in use, a farther distance is required to enter the safe range of electromagnetic radiation.

Low-power cell phone signal jammers are commonly used for indoor mobile phone signal shielding under normal circumstances. High-power mobile phone jammers are basically used outdoors, and only a small number are used indoors. They are mainly used to solve the problem of large indoor areas and relatively transparent environments. High-power cell phone jammers are used indoors.

When low-power mobile phone signal jammers are used outdoors, the most important thing is to pay attention to rain protection. At this time, after the signal jammer is installed, a canopy should be installed above the mobile phone jammer. Generally, the edge of the canopy is required to exceed the mobile phone signal jammer by about 20 cm, and when installing the canopy, the two sides of the canopy should also exceed the jammer by about 15 cm, so as to effectively prevent rain from splashing into the ventilation shutters of the cooling fan. Also pay attention to waterproofing the power supply line of the signal jammer so that it can be used normally. At the same time, it is necessary to regularly check whether the mobile phone signal jammer is faulty.

The chassis of the high-power mobile phone signal jammer has been designed to be waterproof before leaving the factory. There is no need to worry about rain splashing into the chassis during normal rainfall. You only need to pay attention to the installation height of the mobile phone signal jammer host. It must meet the requirements of the on-site installation environment and be higher than the highest historical water level at the location. When the high-power jammer is used outdoors, it is necessary not only to pay attention to rain protection, but also to lightning protection when necessary. The lightning protection method is to weld the lightning rod to the antenna bracket, and then insert a steel chisel about 2 meters long into the ground, and weld one end of the steel chisel to the antenna bracket or lightning rod with steel wire, or connect it to the lightning protection net on the roof. Of course, the connector of the power supply line of the high-power jammer should also be waterproofed.

Nowadays, mobile phone signal jammers are installed in almost every examination room to prevent candidates from cheating with their mobile phones during the examination. Those who are more careful will find that the jammer will be very hot after being turned on and used for a period of time. Everyone knows that electronic products will generate some heat more or less when in use. If the machine is not cooled, it will affect the normal use of the machine. In severe cases, it will cause irreparable damage to the equipment.

This is enough to show that heat dissipation is very important for mobile phone signal jammers. In order to better achieve the interference effect, manufacturers have also tried their best to dissipate the heat of the jammer. At present, major manufacturers have basically two points for the heat dissipation of jammers, natural heat dissipation or adding a cooling fan. The natural heat dissipation method is more common in outdoor machines. The heat is dissipated into the atmosphere through the large area of ​​the heat dissipation fins on the outer shell of the equipment. If there is wind, the heat dissipation effect of the jammer will be better. Of course, this is also a big test for the performance indicators of various components inside the machine. Therefore, major manufacturers will choose devices with good performance and small temperature rise, but the cost is relatively high, so they are generally used in high-power machines. Another method is to use a cooling fan to assist in heat dissipation. The machine generates heat, and the cooling fan assists in cooling the radiator to dissipate the heat as quickly as possible. This minimizes the impact of the temperature increase on the device. Machines that use cooling fans to assist in heat dissipation are mostly small-power mobile phone signal jammers. Of course, for special models, cooling fans will also be used to assist in heat dissipation of the jammer, such as trolley-type and backpack jammers.

Cell phone jammers can not only interfere with mobile phone signals, but also interfere with radio signals in other frequency bands by adding interference modules of different bands. Everyone knows that radio signals can achieve different functions according to the different frequencies used, including GPS, WiFi, etc. Because of the differences in radio technology and standards, as well as the differences in signal strength emitted by the signal transmitter of the radio signal, the interference range of cell phone jammers will be different when interfering with these radio signals.

At present, the signal frequency that can be used by domestic mobile phones ranges from 700M to about 6000M, including signals from mobile phone operators, WiFi signals, GPS signals, etc. According to the different types of signals, they are divided into various uses, and the functions achieved are also different.

The interference range of mobile phone jammers for mobile phone signals of different frequency bands is also different. In the same test environment, the mobile phone signal strength of each frequency band cannot be the same. However, mobile phones can receive mobile phone signals of multiple frequency bands at the same time according to different operators to ensure that the mobile phone can be used normally. At this time, it is necessary to test the frequency band of the strongest mobile phone signal on the scene, and then adjust the cell phone jammer or adjust the signal source, and then cover the mobile phone frequency band with the strongest signal on the scene. Then, it can be basically determined that the mobile phone jammer can interfere with the ability of all mobile phone signals on the scene.

In certain cases, the above solutions are relatively expensive. In order to save costs and pursue higher cost-effectiveness, the following solutions can be considered

Test the relatively strong frequency bands on the scene, and then equip high-power interference modules to carry out targeted interference on these strong signal frequency bands, thereby reducing costs and achieving the purpose of interference effect.

Customers often ask in what kind of environment can the effect of the cell phone signal jammer be maximized? Why do mobile phone signal jammers not work well in some places, or the shielding effect is relatively poor? In fact, this is closely related to the electromagnetic environment around the place where the jammer is used. So in what environment will the shielding effect be relatively poor?

1. The environment where the mobile phone signal jammer is used is not transparent, there are many compartments, or walls are blocked. This is because the penetration of wireless signals is relatively poor, which depends on the frequency of the transmitted signal. The higher the frequency, the worse the penetration, or diffraction performance.

2. The place where the jammer is used is close to the base station. The mobile phone signal will be relatively strong in places close to the base station. If the jammer wants to shield the mobile phone signal, the signal strength of the emitted signal must be stronger than the mobile phone signal on site, so that the mobile phone signal can be shielded.

3. There is an indoor signal distribution system in the building where the mobile phone signal jammer is used, commonly known as a mobile phone signal amplifier. The place with a mobile phone signal amplifier is similar to the place close to the base station. If you want to shield the mobile phone signal, the jammer needs to have a larger transmission power.

When using a mobile phone signal jammer, you need to pay attention to the distribution of base stations around the site of use and confirm whether there is an indoor signal distribution system in the building. If there are too many compartments, multiple jammers are needed to cooperate with the shielding. If the base station is close, you can coordinate with the operator to adjust the direction of the base station antenna plate, so that the mobile phone signal strength at the site can be reduced, thereby improving the shielding effect of the jammer. In an environment with an indoor signal distribution system, when using the jammer, let the user turn off the power of the indoor signal distribution system to reduce the signal strength, which can improve the effect of the jammer to a certain extent.

When using the cell phone jammer, the most basic requirement for the use environment is to have a stable power supply. The most common one is AC 220V mains electricity. Different types of mobile phone jammers can be selected for different use environments. For outdoor use, it is recommended to use a mobile phone jammer with good waterproof performance and fully enclosed shell. In places such as chemical plants or oil depots at gas stations, explosion-proof cell phone jammers are required. For indoor use, only a stable and reliable power supply is required.

Of course, some units have their own control platforms or control modules. When the cell phone jammer needs to be uniformly controlled through the control platform, the mobile phone jammer can be connected to the control module. As long as the control module can control the on and off of the power supply through a relay or PLC, the control platform can be used to control the mobile phone jammer. However, it is recommended that when using the control platform to control the mobile phone jammer, do not frequently control the on and off of the power supply of the mobile phone jammer, which will affect the service life of the cell phone jammer and increase the maintenance cost. The cell phone jammer is used for a long time and is not afraid of long-term continuous use.

As the most common auxiliary equipment in the examination room, the cell phone signal jammer is a magic weapon to prevent candidates from cheating. According to the different wireless signal interference frequency bands configured inside the jammer, the functions of different wireless signal interference are also different, so how to increase the interference of the wireless intercom frequency band.

Nowadays, cell phone signal jammers have basically realized modularization, that is, different interference modules are used according to different wireless signal interference requirements on site and different frequency bands. Through the rapid replacement of modules, the advantages of rapid repair or rapid increase of wireless signal interference frequency bands can be easily achieved. However, adding different frequency band modules on the basis of the original mobile phone signal jammer is still a headache for many manufacturers, because at the beginning of the design of the cell phone signal jammer, it was designed according to the standard mobile phone frequency band, and there was no space for increasing the frequency band. If the original jammer cannot add interference modules under different usage requirements, then more wireless signal interference requirements cannot be achieved.

The cell phone signal jammers produced by our company have fully taken this into consideration when designing. If there is a requirement to add modules with different frequency bands on site, the radiator can be superimposed to easily achieve the original 12 interference frequency band outputs and expand more wireless interference channel outputs. The fixed holes required for superimposing radiators are reserved, so that even if more frequency bands of cell phone signal jammers need to be added later, there is no need to worry about insufficient radiator space. It can be expanded to up to 24 interference frequency modules to achieve signal interference of more frequencies, or to achieve the same site through frequency refinement to expand the ability of interference effect.

When using wireless signal jammers and other wireless signal jammers, it must be reasonable and compliant. According to relevant laws and regulations, if it causes a large-scale interruption of other people's communication signals, it is an illegal act. Therefore, in order to ensure people's normal communication rights and the demand for cell phone signal shielding in some places, the use of cell phone signal jammers must be reasonable and compliant.

The signal of the mobile phone is transmitted through the signal of the base station or signal amplifier. In order to ensure the coverage of mobile phone signals, operators are constantly building base stations or indoor signal distribution systems and other infrastructure to enhance the coverage of mobile phone signals, which greatly facilitates people's communication and also avoids the normal emergency calls of mobile phones.

What the mobile phone signal jammer does is to interfere with the connection between the mobile phone and the base station signal in a certain area, so that the mobile phone communication equipment cannot correctly analyze the base station signal, resulting in the inability to use the mobile phone normally. The mobile phone is characterized by no signal and limited service. Generally speaking, mobile phone signal jammers are mainly used in places where mobile phones are prohibited, such as supervision places, confidential places, military strongholds, school examination rooms, oil depots, etc.

When using a cell phone jammer, you cannot increase the interference range without limits in order to meet the need to block mobile phone signals, causing mobile phones in non-interference areas to be unable to be used normally. This is a violation and is not desirable.

Taking the school examination room as an example, it is forbidden to carry and use mobile phones during the examination. In order to be foolproof, schools generally choose to install and use cell phone signal jammers to prevent students from cheating during the examination. Choosing Shengma brand mobile phone signal jammers can network mobile phone jammers, uniformly control and manage all cell phone jammers through software, and adjust the interference range of each mobile phone jammer through software. In this way, even if the shielding range of some mobile phone jammers is too large and affects the surrounding residents, this problem can be solved immediately by adjusting the interference range. It not only meets the mobile phone signal shielding in the examination room, but also does not affect the normal communication of residents in the surrounding area, and truly achieves reasonable and compliant use of cell phone jammers, communication and interference are not wrong.