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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.

For some occasions, the use of mobile phones will bring a lot of troubles, so people will think of installing and using mobile phone signal jammers in places where mobile phones are prohibited, so as to prevent the use of mobile phones and ensure that the mobile phone signals in this area are restricted. Everyone likes to choose some cost-effective products, and mobile phone signal jammers are no exception. They want to spend less money to buy a jammer with a large shielding range, reliable quality, and little interference to the outside world. So let's talk about the cost-effectiveness of jammers.

The range referred to here is the effective interference range of mobile phone signal jammers. Are there blind spots or leaks within this interference range? In some places where mobile phone signal jammers need to be installed, if there are base stations of operators, then the mobile phone signal will be relatively stronger. This situation will affect the interference range of the jammer. In order to achieve a good interference effect, it is necessary to purchase a jammer with higher power, and the cost will increase accordingly. In theory, the greater the transmission power of the jammer, the better the interference effect on mobile phone signals, and of course the cost will increase accordingly.

Here refers to the trouble-free use time of the mobile phone signal jammer. Assuming that the jammer has a warranty of 1 year, but it actually runs stably for 3 years, the cost performance will be tripled. If the warranty is 1 year, it often fails in actual use. Although it is free of charge during the warranty period, the possible risks are immeasurable, and personnel resources are wasted. The corresponding cost performance will be reduced, and the user experience will be lowered.

If the interference of the mobile phone signal jammer to the outside world is not considered, it is very easy to interfere with the mobile phone signal in most cases, as long as the interference power is increased. However, it is necessary to ensure that there are no blind spots and no leaks in the shielding area. The power of the jammer is large, which may cause great interference to the outside world. This requires that full consideration should be given when designing signal interference, and it should be controlled from a technical point of view to achieve accurate and efficient shielding without interference to the outside world.

The cost should follow the interference requirements and budget. You cannot blindly choose cheap products, nor can you simply think that high prices have good shielding effects. In actual selection, the interference effect of the mobile phone signal jammer is very important. It is also necessary to investigate its previous cases on the spot, test the interference effect, and then make a choice.

Recently, a key device that has been frequently active in major examination halls, I believe many people should know the real role of this device. It is a key device that has been vigorously promoted in school exams of all sizes, which can effectively prevent and prevent candidates from cheating. That is today's protagonist: cell phone signal jammer.

All candidates who take the college entrance examination are concentrating on preparing for the college entrance examination and strive to achieve good results in the college entrance examination. At the same time, many schools are looking for a batch of more high-performance mobile phone signal jammers to ensure a stable order in the examination hall, so that those who use illegal means to cheat have nowhere to hide, thereby improving the fairness of the college entrance examination to each candidate.

But what many people don't know is that there is such a device, which may have a serious impact on the effect of the mobile phone signal jammer, that is, the interference range, which is a problem that all college entrance examination examination halls in the school need to consider. What is this device? It is the operator's base station, commonly known as a signal tower, because if there is a base station near the examination hall, it will affect the interference effect of the mobile phone signal jammer. Of course, this refers to the signal strength of the signal transmitted by the base station to the examination room within 500 meters near the examination room, so the interference range of the mobile phone jammer will be reduced. If the base station is 500 meters away from the examination room, the impact on the mobile phone jammer is very small. As for why it causes an impact, this is because when the base station itself transmits signals to the surrounding area, it will carry a strong electromagnetic signal, and the electromagnetic signal emitted by the base station will decrease accordingly as the distance increases. The strength of the electromagnetic signal field is one of the most important factors affecting the interference effect of the cell phone signal jammer.

Therefore, in terms of the examination room, before purchasing a cell phone signal jammer, it is better to conduct an actual test to determine the actual interference range of the jammer, and then decide how many mobile phone jammers are needed based on the actual test data. This is very important, otherwise some places will not be interfered. However, regardless of whether the mobile phone jammer will be affected, a more superior and more professional mobile phone jammer is a must.

The police frequency jammer purchased by the customer earlier did not originally have the operator's 5G frequency interference module. With the gradual popularization of 5G signals, the police jammers that did not have 5G frequencies cannot shield and interfere with 5G signals, so the jammers must be upgraded to 5G signal frequencies to shield and interfere with 5G frequency signals.

According to the division of operator 5G signal frequencies issued by the Ministry of Industry and Information Technology, the 700M shared by China Broadcasting and Television and China Mobile, the 3.4G-3.6G frequencies of China Telecom and China Unicom are added to the original 4G signal frequencies of operators, and the original 2555-2655 of China Mobile is expanded to 2515-2675M. That is to say, the police frequency jammer needs to upgrade the 5G shielding module, and 2-3 modules need to be added, and the mobile 2.6G module needs to be expanded. Shielding interference of 5G signals can be achieved. Some friends may ask, why is there no increase in the 4800-4900M frequency of China Mobile 5G? This is because the 4.8G-4.9G frequency band has not been fully rolled out at present, and it is necessary to determine whether the police jammer needs to add an interference module for this frequency band according to different usage sites.

To upgrade the 5G shielding of the police frequency jammer, it only needs to add 2-3 interference modules for the frequency band and expand the frequency of the 2.6G module, which can meet the mobile phone signal shielding of most usage sites.

Can cell phone signal jammers shield through walls? To answer this question, we need to look at several situations.

First, let's look at the cell phone signal jammer itself. The mobile phone jammer transmits a wireless radio frequency signal specifically for mobile phone signals. When it encounters a wall in the transmission path, part of the signal will be reflected back, and part of the signal can directly penetrate the wall, but the signal strength will be attenuated to a certain extent. And facing different walls, the attenuation degree of mobile phone jammers is also different. For example, the wall is a reinforced concrete wall or a brick-concrete wall. If there is a reinforced concrete wall and two consecutive brick-concrete walls, the interference signal emitted by the mobile phone signal jammer is basically attenuated, that is, it cannot be used through the wall. Therefore, the signal emitted by the mobile phone signal jammer usually cannot penetrate the wall. After all, the shielding signal (wireless signal) is not an X-ray, and it does not have the ability to penetrate directly. There will be a certain refraction and reflection when encountering the wall.

Different wall materials have different attenuation levels for cell phone jammers. For example, if the wall is made of light steel keel gypsum board, its attenuation is small. Similarly, glass, wooden doors, etc., have small attenuation. In addition, if the signal of the mobile phone jammer is refracted through the open space of doors and windows or through the reflection and refraction of the wall, it will have some impact on the mobile phone signal behind the wall, which makes people feel that the mobile phone signal jammer has the illusion of penetrating ability.
Of course, the size of the wall penetration ability is also related to the transmission power of each frequency band of the mobile phone jammer. Generally speaking, the greater the transmission power, the stronger the penetration ability, just like listening to the sound next door through a wall. If the sound next door is loud, then you can hear it more clearly, and if the sound next door is small, you basically can't hear it.
The wall penetration ability is also related to the frequency of the wireless signal transmitted by the mobile phone jammer. As we all know, the lower the frequency of the wireless signal, the stronger the diffraction performance, just like the radio station we usually listen to. The frequency transmitted by the radio station is basically tens of megahertz to more than 100 megahertz, and the frequency is very low. A transmission tower can cover more than 100KM. The lower the frequency of the wireless signal, the stronger its penetration ability will be.

Therefore, when using a cell phone signal jammer, if you can determine that the wall is made of gypsum board or wood board, you can choose whether to install it on the wall. If the wall is brick-concrete or steel-concrete, it is not recommended to install the cell phone jammer on the wall.

The shielding range of a cell phone signal jammer is mainly determined by the following factors.

1. The transmission power of the cell phone signal jammer itself in different frequency bands. In theory, the greater the transmission power, the greater the shielding range. And it is related to the frequency band of the signal frequency transmitted by the frequency band. If the transmission power is the same, the narrower the bandwidth, the greater the shielding range.

2. The shielding range of a cell phone signal jammer also depends on the signal strength at the site of use. The strength of the mobile phone signal at this site depends on whether there is a signal source for mobile phone signal transmission around the site of use, that is, the operator's base station, commonly known as an antenna tower. The distance from the signal tower to the site determines the strength of the mobile phone signal at this site. Of course, this signal source also includes an indoor signal distribution system, commonly known as a cell phone signal amplification device. The distance from this signal source to the site is the most critical factor in determining the shielding range of the cell phone signal jammer. Because the distance from the signal source to the site cannot be changed, it is basically impossible to change the signal strength emitted by this signal source.

3. The shielding range of the cell phone signal jammer is also related to the spatial layout and wall material of the site. If the spatial environment at the site is relatively transparent, the shielding range of the cell phone signal jammer is much better than that of some environments with multiple compartments. And the shielding range of the cell phone signal jammer is also related to the wall material at the site. Basically, the shielding range of the mobile phone signal jammer and the wall material are larger for glass walls, wooden walls, and gypsum board walls than for brick walls and concrete walls. If the wall is a sandwich panel wall with metal on both sides and foam in the middle, the interference signal of the cell phone signal jammer is basically inaccessible.