There are some differences in how different jammers work. In some special cases, people want to know how to avoid jammers on mobile phones. At this time, we need to understand all aspects of things and be able to constantly understand these frequency bands. For you is the most important. Many jammers basically have relatively fixed frequency bands during their operation. If we can correctly understand them and keep our signals within the range of this frequency band, then for you, it will naturally Can be avoided.    signal jammer

The principle of how to avoid jammers on mobile phones. When you want to avoid jammers, everyone should really understand the specific principles. There will be certain differences in the principles of how different devices work. You need to do a good job in all aspects in a targeted manner. Understanding and correctly understanding the specific principles can bring us more development. Therefore, when everyone is doing it, we all need to pay attention to this aspect in a timely manner. This is how we can better avoid problems. Prospects.

When you want to know how to avoid blockers on your mobile phone, you can actually use the new device throughout the entire process. When many new types of equipment are used, the specific frequency bands of these signals are not within the overall control range at all, so during the application process, we need to truly understand each situation. Carefully make a good choice of equipment, so that it will be better for the entire process, so you need to be fully aware of it during the process.

If you really want to know how to avoid the jammer on your mobile phone, then there is another most direct and effective way, and then you can directly destroy the device without others paying attention. When you can do a good job of destroying the device, otherwise the phone will not be affected, but everyone should still pay attention to more aspects during this process, and be able to truly understand it under this situation. . If you can secretly turn off the power, or destroy the main power supply, this will prevent the jammer from functioning, thus ensuring that we can use our mobile phones normally. In the process of choosing a method, everyone needs to truly combine their own actual situation and then choose a practical method.

Radio interference refers to unwanted signals or strong electromagnetic interference that may cause damage to useful signals in the radio frequency (9KHz3000GHz) frequency band. It may have effects on the reception of radio communication systems, such as performance degradation, misinterpretation or loss of information. When it endangers the normal operation of radio navigation or other safety services, or seriously damages, hinders, or repeatedly blocks the normal operation of the radio industry in accordance with regulations, this interference is called harmful interference.   signal jammer

Classification and causes of radio dryness
Radio interference can be divided into two categories: conductive interference and radiated interference. However, they are usually divided into two categories: natural interference and man-made interference according to the nature of dry sources. Natural interference comes from natural phenomena and is uncontrollable, mainly including celestial interference, solar interference, cosmic interference, etc. Human interference originating from machines or other artificial devices is controllable. Man-made interference can be divided into two categories: radio equipment interference and non-radio equipment interference. Non-radio equipment interference includes interference from industrial, scientific research, medical and other electrical equipment, power line trunks, etc. In order to prevent it from causing harmful interference to radio services, national international standards have stipulated its frequency of use and allowable radiation values.
Radio equipment interference accounts for a large proportion of radio interference. There are:
1. Co-channel interference. Any interference sent by other signal sources that has the same frequency as the useful signal and enters the receiver's intermediate frequency passband in the same way is called co-channel interference. Since the same-frequency interference signal is amplified and detected in the same way as the useful signal, when there is a carrier frequency difference between the two signals, beat interference will occur; when the modulation degrees of the two signals are not large at the same time, distortion interference will occur; when the two signals Distortion interference will also be caused when there is a phase difference. The larger the interference signal, the smaller the output signal-to-noise ratio of the receiver. When the interfering signal is large enough, it can cause blocking interference to the receiver. This kind of interference is mostly caused by the small expansion distance of co-frequency reuse. Some illegal users of radio stations use frequencies privately, intentionally or unintentionally, using the same frequency as legal radio stations. However, because the reuse distance is too small, they often cause co-channel interference to legal radio stations (stations). Of course, there are also cases where the @lizhongBai radio management department assigns frequencies inappropriately, or the radio management departments in adjacent areas fail to perform frequency coordination when assigning frequencies, or the communication network design department analyzes and calculates the electromagnetic compatibility of the network when designing the communication network. Co-channel interference caused by negligence or mistake
2. Adjacent channel interference. Any interference caused by signals within or near the radio frequency passband of the receiver that fall into the intermediate frequency passband after frequency conversion is called adjacent-channel interference. This kind of interference will reduce the signal-to-noise ratio and sensitivity of the receiver; strong interference signals can cause blocking interference in the receiver. Most of this interference is caused by the technical indicators of radio equipment not complying with national standards. In terms of transmitters, if the frequency stability is too poor or the modulation is too large, the transmission spectrum is too wide, which can cause adjacent-channel interference to other stations. As for the 80 series civilian FM telephones, the country stipulates that the channel spacing is 25KNZ. The maximum frequency deviation is 5KHz, and the maximum modulation frequency is 3000Hz. The calculated modulation bandwidth is 16KHz. In fact due to non-linearity in the transmission process the transmitter emission occupies a wider frequency band than necessary. If factors affecting the bandwidth of the transmitter are not strictly controlled, unnecessary out-of-band radiation can easily occur; in terms of receivers, when the selectivity of the IF filter is poor, interference can easily occur or become serious.
3. Out-of-band interference.
The interference caused by the transmitter's spurious radiation and the receiver's spurious response is called out-of-band interference.
(1) Stray radiation interference from the transmitter
In the low frequency bands of VHF and UHF, most mobile communication equipment, especially base station transmitters, use crystal oscillators to obtain higher frequency stability. This kind of interference is caused by the excessive stray radiation value of the transmitter. For this reason, most of the national standards for the stray radiation value of various types of transmitters have strict regulations. The excessive stray radiation value of the transmitter is usually caused by factors such as the number of frequency multiplications, poor selectivity of the frequency multiplier output loop, and poor shielding isolation between frequency multipliers.

Now, with the development of information technology, mobile phones have become an indispensable part of people's lives and work. However, in some important examination occasions, mobile phones may become a tool for cheating, affecting the fairness of the examination. In order to effectively prevent this from happening, many exam centers use exam jammers to control mobile phone signals.          signal jammer

So, what is an exam blocker? The examination jammer is a mobile phone signal control equipment specially used in examination rooms. It can generate corresponding shielding signals according to different frequencies and formats, and cover the shielding signals to designated areas through antennas or distributed systems. In this way, when candidates use their mobile phones in the examination room, they will not be able to receive signals from external base stations and cannot make calls, text messages, or surf the Internet, thereby preventing cheating.

So, can the exam jammer block WiFi signals? The answer is yes. WiFi signal is a wireless LAN technology that uses the 2.4GHz or 5.8GHz frequency band to transmit data. The exam jammers currently on the market can support shielding signals in multiple formats and frequency bands, including 2.4GHz and 5.8GHz WiFi signals. Therefore, when the test jammer is turned on, it can interfere with and block the WiFi signal in the examination room, making it impossible for candidates to cheat through the WiFi network.

So, how do exam jammers work? In fact, the working principle of the exam jammer is very simple, which is to use the interference principle to destroy the communication between the mobile phone and the base station. We know that data and sound are transmitted between mobile phones and base stations through radio waves. Radio waves are electromagnetic waves with a certain frequency and wavelength. When two or more radio waves with the same or similar frequency exist at the same time, interference occurs, causing the radio waves to be distorted or disappear.

Therefore, when the test jammer is turned on, it will generate radio waves of the same or similar frequency according to the uplink and downlink channels of the mobile phone system, and transmit them with higher power. In this way, a powerful interference magnetic field is formed in the examination room, making it impossible for mobile phones to receive normal data and sounds from the base station, and cannot send data and sounds to the base station.

The working principle of the examination room signal jammer is to disrupt the original signal transmission by emitting interference signals at the same frequency as mobile phone signals and WiFi signals, thereby shielding mobile phones and wireless networks. This interference signal prevents the mobile phone from establishing a connection with the base station and receiving and sending information, thus effectively preventing cheating from occurring.   signal jammer

In practical applications, the examination room signal jammer can be flexibly configured according to different scenarios. For example, in a large examination room, multiple jammers may be required to work together to ensure that the entire examination room area is effectively covered. In smaller examination rooms, a jammer can meet the needs.

It is worth noting that the distance from the signal base station has an important impact on the effectiveness of the jammer. As mentioned before, the closer you are to the base station, the more jammer power you need. This is because the signal emitted by the base station is stronger and requires stronger interference to effectively block it. Therefore, when arranging the examination room, it is necessary to select a jammer with appropriate power based on the actual distance between the examination room and the base station to achieve the best shielding effect.

In addition to examination occasions, examination room signal jammers can also be used in other places where information confidentiality is required. For example, in military areas, government agencies, scientific research institutions and other places, the use of signal jammers can prevent information leakage and external interference.

1. The importance of establishing a mobile phone signal blocking system in prisons

Due to the continuous development of science and technology, the technical level of personal mobile communication methods continues to improve. The side effects are becoming more and more prominent in similar areas such as prisons. In detention centers and prisons, communication tools such as mobile phones are expressly prohibited, not only for prisoners but also for supervisors. Once a mobile phone is brought into a prison and used, it will bring great harm to the management, safety, and development of the prison.  signal jammer

If there is a problem with the mobile phone signal blocking system, it may not completely block mobile phone communications but may cause extremely serious adverse consequences.

Therefore, it is very necessary to establish an effective and high-quality mobile phone signal blocking system, so as to bring technological guarantee to the management of detention centers and prisons.

2. How to establish the mobile phone signal blocking system in prisons

Reasons for different signals due to the influence of external and environmental factors

Due to the different power and channel numbers of base stations such as China Mobile, China Unicom, and China Netcom, as well as the different distances between the base stations and the prison, as well as the different sizes of other nearby buildings and topography, the signals in the prison area are also different.

Because the scale, building structure, local mobile phone base station direction, power, terrain and other factors of each prison are different, the mobile phone signal strength, number of channels, and frequency bands in each area of the prison are different. In addition, radio waves are invisible and intangible, and their transmission is affected by various factors.

Due to the different characteristics of the actual use environment, the direction, power, and distance of each base station, there may be dozens of channels for users to automatically select in the same environment. At the same time, there are differences in spatial field strength indoors and outdoors, ground and metal objects. Signals blocked by mobile phones have very complex adverse effects. So we all have this experience, for example: (a) In different areas, some mobile signals are strong, and some China Unicom signals are strong; (b) Even in the same place, the signals are also different, some are strong and some are weak, so mobile phones The signal shielding system is a highly professional system project.

Measures taken to address the above reasons

Conduct a detailed on-site survey of the prison environment, topography, landforms, etc. very carefully. The survey needs to shield the regional environment, understand the actual requirements of the customer, and design personalized solutions. Therefore, special investigation and solution must be carried out. Scientifically and systematically solve problems for customers comprehensively.

Conduct a thorough analysis of local signal distribution and building structures. It is positioned using non-general equipment and measured by a series of instruments. Choose different composite antennas based on the organic combination of antenna application principles in different frequency bands.

After on-site inspection of the building structure, terrain and local base station direction, power, channel, etc., we have a large number of employees with excellent communication microwave technology, professional skills, high quality, strong sense of responsibility, very serious requirements for details, and rich construction experience. , can meet the construction needs of large-scale mobile phone signal shielding system engineering sites, and solve and handle various difficult problems on site in a timely manner. Complete and rich professional technical information and professional testing and analysis instruments can solve practical problems for prison customers and provide customers with the best solutions.

3. The mobile phone blocking system used in prisons is different from that used by ordinary citizens.

The area, scope and building structure used by the two are different.

The prison must shield the surrounding environment of the building (the distance from other non-shielded buildings and the building structure), so the use area, scope, and floor structure of the prison must ensure that the shielded area is very complex and special. In order to ensure the effect of the area to be shielded, it also ensures normal calls in the shielded building and surrounding unshielded areas.

Shielding for civil use is relatively simple and is only temporary, so the area, scope, and floor construction are relatively simple and difficult to consider.

The purpose of use of the two is different

The mobile phone signal shielding system is a professional modern communication signal shielding technology, especially in the special environments of prisons and detention centers, which have put forward higher requirements for mobile phone signal shielding technology. Mobile phone signals may change significantly at different times. Detention centers and prisons are generally designed according to the requirements of the highest signal and with this power redundancy. They are suitable for high-reliability confidential situations and ensure that the shielding effect is stable and effective. Such shielding requirements It is strictly shielded and operates continuously 24 hours a day throughout the year. For this special occasion with high requirements, the purpose of establishing a high-quality mobile phone signal shielding system is to ensure safety and development.

General civilians do not need to consider external factors when establishing mobile phone signal shielding. The purpose is to keep quiet. It is an intermittent task, which means it is temporary. The purpose of use of the two is completely different.

Are the consequences of failure or missing points different between the two?

If there is a problem with the mobile phone signal blocking system in a very demanding environment like a prison, it is conceivable that the consequences will be extremely serious.

It really doesn't matter to ordinary civilians. For them, good or bad is just talk and there won't be any problems with the consequences.

4. How to build a high-quality mobile phone signal shielding system in prisons
The mobile phone signal shielding system is a relatively professional modern communication signal shielding technology. Especially the special environment of prisons puts forward higher requirements for mobile phone signal shielding technology. For example, in the application environment of general conference communication signal shielding systems, participants come and go in a hurry, and there is almost no time to "search" for communication signal shielding blind spots. In the special environment of the prison, the number of people is dense and the activities are relatively concentrated. As long as criminals have a mobile phone, it is easy to "search for a long time" and find blind spots in blocking. Even if criminals do not specifically search for blocking blind spots, pervasive text messages will expose missed blocking blind spots.

How to evaluate the effectiveness of cell phone signal blocking systems in prisons
In order to ensure that there are no shielding blind spots in the prison, repeated tests should be carried out, and professional equipment detectors should be used in places with relatively strong signals, such as "windows" or "every corner". The construction party can also entrust relevant local departments to conduct professional testing and inspect the equipment. , radiation, and interference to other systems; ensure no blind spots; comply with the testing regulations of relevant departments.

1.Planning and Design
Needs assessment: First, based on the prison's layout, building materials and signals
Coverage requirements, assess the type and number of screen systems required
System Design: Design a comprehensive installation plan including equipment location, power configuration and signal coverage          signal jammer
2. Installation process
Equipment placement: Install the signal jammer at the designated location according to the design drawings. Make sure all equipment is installed in a location that maximizes coverage area and is less likely to be vandalized.
Power connection: Connect to a stable power system. For equipment that requires high power output, ensure that the power line is safe and reliable.
3. System configuration
Frequency settings: Set the frequency and power of the shielding system according to the prison's internal communications policy and external regulations. Ensure settings comply with legal requirements while effectively blocking illegal communications.
Testing and debugging: After completing the initial installation, conduct system testing to check whether the signal coverage is uniform and effective. Adjust device settings until optimal performance is achieved.
4.Acceptance
Performance verification: Test system performance multiple times at different times and under different weather conditions to ensure stable operation under all circumstances
Documentation Archiving: Record installation details, configuration settings, and test results for
Provide reference for future maintenance and upgrades.

Frequently asked questions and their solutions
1. Uneven signal coverage
Problem description: The signal shielding effect is poor or the shielding dead spots are poor in some areas. Solution: Add a low-power screen or adjust the location of existing equipment.
Improve signal coverage. Use signal strength test equipment to accurately measure and optimize coverage.
2. Equipment overheating
Problem description: The device overheats after long-term operation, affecting performance and even damaging components.
Solution: Make sure all screens have good cooling systems. Regularly clean dust and dirt around the equipment to avoid blocking the vents
3. System maintenance
Problem description: Over time, shielding systems can degrade due to improper maintenance.
Solution: Develop a regular maintenance schedule that includes checking power lines
Update software and firmware, test signal strength and stability. Train technicians to respond to daily glitches and emergencies
in conclusion
The effective installation and maintenance of prison cell phone signal shielding systems is essential for ensuring the security of prison cells.
Safety is paramount. Through strict planning, careful installation, thoughtful configuration, and ongoing maintenance, you can ensure that the system operates effectively over the long term and effectively prevent any unauthorized communication activities. Remember, a good screen system not only improves the overall security of the prison, but also reduces instability within the prison by blocking illegal communications.

With the continuous development of mobile value-added services, moving towards 3G (3rd Generation, third generation mobile communications) is an inevitable choice for major mobile operators. Compared with the first two generations of systems, the main features of the third generation mobile communications system are It can provide a variety of mobile multimedia services. Its transmission rate supports 144kb/s in a high-speed mobile environment, 384kb/s in a slow-moving walking environment, and 2Mb/s in a stationary state. Its design goal is to provide greater system capacity and better communication quality than the second-generation system, and to better achieve seamless roaming around the world and provide users with voice, data and multimedia services. various services, and good compatibility with existing second-generation systems must also be considered.              signal jammer

There are currently three main 3G standards accepted by the ITU: WCDMA, CDMA2000 and TDSCDMA. CDMA is the abbreviation of CodeDivisionMultipleAccess (code division multiple access) and is the technical basis of the third generation mobile communication system. The first generation mobile communication system uses the analog modulation method of frequency division multiple access (FDMA). The main disadvantage of this system is spectrum utilization. The rate is low, and signaling interferes with voice services. The second-generation mobile communication system mainly uses time division multiple access (TDMA) digital modulation, which increases system capacity and uses independent channels to transmit signaling, which greatly improves system performance. However, TDMA The system capacity is still limited, and the handover performance is still imperfect. The CDMA system is characterized by its simple frequency planning, large system capacity, high frequency reuse coefficient, strong anti-multipath ability, good communication quality, soft capacity, and soft handover. Huge development potential.

The full name of WCDMA is WidebandCDMA. This is a 3G technical specification developed based on GSM network. It is a broadband CDMA technology proposed by Europe. It is basically the same as the broadband CDMA technology proposed by Japan and is currently being further integrated. This standard proposes the evolution strategy of GSM (2G)-GPRS-EDGEWCDMA3G. GPRS is the abbreviation of General Packet Radio Service (General Packet Radio Service), and EDGE is the abbreviation of Enhanced Datarate for GSMEvolution (GSM Evolution with Enhanced Data Rate). These two technologies are called 2.5-generation mobile communication technologies. According to the restructuring plan, the new China Unicom will rebuild its 3G network according to the plan.

CDMA2000 is a broadband CDMA technology developed from narrowband CDMA (CDMAIS95) technology. It is mainly promoted by the United States. This standard proposes an evolution strategy from CDMAIS95 (2G) CDMA20001 CDMA20003 (3G). CDMA20001x is called the 2.5th generation mobile communication technology. The main difference between CDMA20003x and CDMA20001x is the application of multi-carrier technology, which increases the bandwidth by using three carriers. Before the reorganization, China Unicom was using this plan to transition to 3G and had built a CDMA IS95 network. According to the reorganization plan, the entire network will be transferred to "New China Telecom".

The full name of TD-SCDMA is TimeDivision-SynchronousCDMA. It is a 3G standard proposed by my country Datang Telecom Company. This standard proposes a direct transition to 3G without the intermediate link of 2.5 generations. It is very suitable for the upgrade of GSM system to 3G. . According to the reorganization plan, "New China Mobile" will be constructed according to this standard and has been initially completed and put into trial operation in some areas.

Comparison of three technical standards
WCDMA, CDMA2000 and TDSCDMA are all broadband CDMA technologies. Broadband CDMA advances the standard CDMA concept, extending the signal over a relatively wider frequency band, thereby reducing propagation problems caused by multipath and attenuation, with greater capacity, and can use different bandwidths according to different needs. It has strong anti-fading and anti-interference capabilities, supports multi-channel simultaneous calls or data transmission, and is compatible with existing equipment. WCDMA, CDMA2000 and TD-SCDMA can all provide a data transmission rate of 2Mbit/s in a static state, but there are still big differences in some key technologies among the three, and the performance is also different.

duplex mode
WCDMA and CDMA2000 both adopt FDD (frequency division digital duplex) mode, and TD-SCDMA adopts TDD time division digital duplex) mode. WCDMA and CDMA2000 can support normal communication of mobile terminals at a speed of about 500 kilometers per hour, while TD-SCDMA can only support normal communication of mobile terminals at a speed of about 120 kilometers per hour. TD-SCDMA is at a disadvantage in high-speed moving environments such as highways and railways.

Chip rate and carrier bandwidth
A high chip rate can effectively utilize frequency selective diversity and spatial receiving and transmitting diversity, and can effectively solve multipath problems and fading problems. WCDMA has the most advantage in this regard. In terms of carrier bandwidth, the higher the bandwidth, the more users can be supported, and the less likely network congestion will occur during communication. In this regard, WCDMA has obvious advantages. The TD-SCDMA system adopts TDD duplex mode, so it only needs to occupy a single 1.6M bandwidth, so TD-SCDMA has the highest utilization rate of frequency resources. Smart antenna technology.

Smart antenna technology is a key technology used by TD-SCDMA and has been patented by Datang Telecom. Currently, neither WCDMA nor CDMA2000 has adopted this technology. A smart antenna is a bidirectional antenna installed on the base station site to obtain directivity, and can also reduce interference between and within cells. These characteristics of smart antennas can significantly improve the spectral efficiency of mobile communication systems.

handover technology
Both WCDMA and CDMA2000 use handover "soft handover" technology, that is, when the mobile phone moves or the base station currently communicating with the mobile phone is busy and the mobile phone needs to communicate with a new base station, the connection with the original base station is not interrupted first. , but first connects to the new base station, and then interrupts the connection with the original base station. TD-SCDMA uses cross-area "relay switching" technology. Smart antennas can roughly locate the user's position and distance. The base station and base station control
The controller can determine whether the user has moved to a nearby area that should be handed over to another base station based on the user's orientation and distance information. If the user enters the handover area, the base station controller will notify the other base station to prepare for handover to achieve the purpose of relay handover.

In today's highly digitalized era, mobile phones have become an indispensable part of our lives. However, with the popularity of mobile phones, some problems caused by them have become increasingly apparent, such as privacy leaks, interruption of exam meetings, etc. In the face of these problems, mobile phone signal screeners have emerged and become an effective solution. But how to choose the right cell phone signal jammer? This article will provide you with an up-to-date buying guide. Assess the needs, why do you need a signal jammer? Before deciding to buy a cell phone signal jammer, first figure out what problem you need it to solve. For educational institutions, jammers can be used to prevent cheating during exams; for businesses, it can avoid cell phone interference during important meetings and protect business secrets from outside surveillance. In addition, mobile phone signal jammers are also very necessary for places where personal privacy and a quiet environment need to be protected, such as hospitals, libraries, etc. By assessing your needs, you can get a clearer picture of why you need a jammer and to what extent it needs to be effective.  signal jammer

Mobile phone signal jammers can generally be divided into the following types according to their working principles:
Fixed jammer: suitable for places where long-term signal shielding is required, such as examination rooms, conference rooms, etc. They have a wider coverage area, but are relatively large and difficult to move.
Portable jammer: small in size, easy to carry, suitable for personal use or temporary screen needs
signal occasion.
Screen fixer: It can adjust the number of signal screens for a specific number, and is suitable for situations where precise control of the shielding range is required.
Different types of jammers vary in performance, usage situations, and prices. Therefore, you should make a decision based on your specific needs when choosing.
When purchasing a mobile phone signal screen, there are several important factors to consider:
1. Coverage: Choose the appropriate jammer according to the size of the area you need to shield. The wider the coverage, the greater the power of the device and the corresponding price will be higher.
2. Screen frequency band: Make sure the selected screen device can cover the frequency band you want to screen. Most modern mobile phone signals
Jammers can block multiple frequency bands, including 2G, 3G, 4G and even 5G signals
3. Battery life (for portable models): If you are purchasing a portable jammer, battery life is an important consideration. Make sure it can continue to work long enough without external power
4. Legality: Before purchasing, understand the laws regarding the use of cell phone signal jammers in your area. Unauthorized use of jammers may be illegal in some regions or countries
5. Price: Price is a factor that needs to be considered when deciding to purchase any product. Compare different models and brands of jammers to find one that fits your budget and meets your needs.

​First, you need to explain to the communication jammer equipment manufacturer the location and size of the range you need to shield. The most important point is whether there are mobile phone signal towers built by operators within three to four hundred meters, which will affect the selection of the jammer. Find several, compare prices and qualifications, and choose the best.
Mobile phone message blocker
1. Shielded frequency bands: Before purchasing, you need to know which signals you want to block. Can selectively block ordinary mobile phone signals (2G 3G 4G). If you only block 2 and 3G or only 3 and 4G, this can be adjusted before leaving the factory. However, Mohan Communications' 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 use of shielding, if it is used in indoor places, it is a shielding device that is generally suitable for examination rooms, conference rooms, offices and other spaces. Gas stations need to be explosion-proof and high-temperature resistant; if it is an outdoor open area, a medium-power signal jammer needs to be used to achieve a suitable distance.
3. Appearance: The shielding cover can be divided into external antenna and internal antenna. Generally speaking, external antennas take up more space than internal antennas because they extend outward. One point; since the antenna extends outward, the effect of an external antenna is more stable.
4. Power size: Shielding devices can generally be divided into small power, medium power and high power. Power ranges from 3W to 100W. When we recommend users to choose Mohan Communications mobile phone signal jammer, it will be based on the area to be shielded.
5. Shielding range: The shielding range is proportional to the power. Generally, test rooms use more low-power signal isolators. It is enough to install one in a classroom, and the shielding range is about 200 square meters. The shielding distance can reach 300-400 meters, depending on the local field strength.  signal jammer
6. Volume: Generally speaking, the smaller ones are handheld and portable, relatively small and easy to carry; low-power desktop computers are generally not very large, similar to small notebook computers; high-power ones are relatively bulky, and the size of the tow box type is very huge.
7. Power supply: The handheld version uses a built-in lithium battery. After the mobile phone signal jammer runs out of power, you can use the power adapter to charge it; the desktop examination room uses 220V voltage supply, and the vehicle power supply is generally 12-36V voltage supply.

With the continuous development of communication technology, people's demand for outdoor signal jammers is also increasing. However, the installation of outdoor signal jammers involves a complex set of engineering issues and technical considerations.  signal jammer

1. Installation plan
Choose a suitable location: When installing an outdoor signal jammer, you first need to choose a suitable location. Generally speaking, the location should be as close as possible to the area where the signal needs to be shielded to ensure the best signal shielding effect.
Consider environmental factors: When choosing an installation location, you also need to consider surrounding environmental factors, such as buildings, trees, terrain, etc., to ensure that the signal jammer will not be blocked or interfered with, affecting its normal operation.
Determine the installation height: When installing an outdoor signal jammer, you need to determine its installation height so that it can cover the signal source that needs to be shielded. Generally speaking, the higher the installation height, the wider the coverage, but safety and stability also need to be considered.
Fixed mounting bracket: When installing the outdoor signal jammer, you need to use a special mounting bracket to fix it in the selected location. The bracket should have sufficient stability and load-bearing capacity to ensure the safety and stability of the signal jammer.
Arrange power and grounding: When installing an outdoor signal jammer, you need to consider its power and grounding issues. An appropriate power interface should be selected and wired correctly. At the same time, ensure that the signal shield is well grounded to the ground to ensure the safe operation of the equipment.

2. Precautions
Comply with regulations and standards: When installing outdoor signal jammers, you need to strictly comply with relevant regulations and standards to ensure the safety and compliance of the equipment. Especially when installing in public places or special environments, you should pay attention to comply with relevant laws and regulations.
Regular maintenance and inspection: After installation, the outdoor signal jammer needs to be maintained and inspected regularly to ensure that the equipment is in good working condition. The inspection content includes the appearance of the equipment, connection lines, power supply, etc. If any problems are found, they will be dealt with in a timely manner.

Cell phone signal jammers, as a device used to block or interfere with cell phone signals, are not only widely used in military, prison and government fields, but also play an increasingly important role in business environments. In the business world, cell phone signal jammers are widely used to maintain security, protect privacy, increase work efficiency, and improve customer experience. This article takes an in-depth look at the use of cell phone jammers in a business setting so businesses can understand how to get the most out of this technology.

 

1. Business meetings and confidential negotiations
Business meetings and confidential negotiations are common scenarios in business settings, and cell phone signal jammers can be used to maintain the confidentiality of meetings and negotiations. By blocking cell phone signals, you can prevent attendees from taking photos, recordings, or transmitting confidential information via their phones during meetings. This helps ensure that business secrets and strategic plans are not leaked, enhancing business security.

2. Hotels and conference centers
Hotels and conference centers often want to provide a quiet environment to ensure smooth running of meetings, events, weddings, etc. Cell phone jammers can be used to limit guests' cell phone use to specific areas, thereby reducing unnecessary interference. This helps improve customer satisfaction, especially for events looking for concentration and a quiet atmosphere.

 

3. Restaurants and cafes
Some restaurants and cafes want to create an environment that is social media-agnostic and focused on dining and connecting. Cell phone jammers can be used to limit guests' use of cell phones during meals, encouraging face-to-face communication and enhancing the dining experience. Additionally, it helps reduce guests taking photos and recordings inside the restaurant, maintaining the privacy and uniqueness of the restaurant.

 

Cell phone signal jammers have wide application prospects in business environments and can be used to maintain security, improve work efficiency, protect privacy, improve customer experience and respond to emergencies. However, when using a cell phone jammer, legal compliance must be carefully considered and the appropriate device selected based on specific needs. By fully understanding the application potential of cell phone jammers, businesses can better leverage this technology to improve the safety and efficiency of their business environments.