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  • dojammer
    How does the signal blocker block the signal and how does it work?
    Nowadays, it is very common to install a cell phone signal blocker for the college entrance examination. Its working principle is that when sending and receiving information on your mobile phone, the mobile phone signal blocker is equivalent to a very powerful cheerleading team, shouting loudly and making a very loud sound. The "noise signal" is so loud that your mobile phone can't hear it, and the "mouth" also shouts but the signal blocker. In fact, it is very simple to understand. This is not to block your signal, but to directly interrupt the connection between your mobile phone and the base station.

    In fact, you can understand that you are whispering with your friends, and suddenly 20 teenagers playing rap come and sing their high notes. At this time, you will find that you can't hear what your friends say for a while. No matter how the mobile phone is upgraded, it needs wireless network equipment, and an invisible network cable is needed to connect it. This invisible network cable is the operator's communication base station. When using a mobile phone, whether it is making a call or sending a text message, it is necessary to get in touch with the nearest communication base station in the surrounding area. If you hold a mobile phone in each hand and use the mobile phone in your right hand to call the mobile phone in your left hand, the radio waves of the mobile phone are not as simple as transmitting from the right hand to the left hand immediately, but will be transmitted from the mobile phone in the right hand to the mobile phone base station 500 meters away, and then make a big circle to transmit back to the mobile phone in the left hand (except for the Bluetooth function). Under normal circumstances, the base station and the mobile phone are chatting in full swing, sending electromagnetic wave signals to each other freely, but once the signal blocker is turned on, it will "beat the drums and gongs" next to the mobile phone, and send out "noise" electromagnetic wave signals that are many times more powerful than the received base station signal. The mobile phone cannot hear what the base station is saying and cannot receive the signal of the base station normally. The connection between the two is disconnected, and the mobile phone will become a deserted island. Whether it is making a call, sending a message or other various functions, it is in a paralyzed state.

    LOJACK 3G 4G Blocker
    In the state of so much noise, not only the signal of the examination room is "blocked", but also the wireless signal near the examination room will be affected, which seriously affects the call quality of mobile phone users near the examination room. Does this signal blocker really work? The entire frequency band of radio waves ranges from a few Hz to tens or hundreds of GHz. Each band may be used as a communication signal. However, except for a small number of very good machines, ordinary signal jammers are "not loud enough" and "tone deaf". A signal jammer can only block a small part of the frequency band, and communication tools can use the unblocked frequency band to communicate. Of course, many telecom operators in China have 2G, 3G, and 4G mobile phone services. The increase is really concentrated in a few small frequency bands. The signal jammer in the examination room needs to take multiple measures to solve this frequency band.

    When the mobile phone signal jammer is resting, it will "shoot" messy radio waves from low frequency to high frequency in each frequency band, affecting the connection between the mobile phone and the base station. The mobile phone signal jammer basically makes the mobile phone unusable, but the violator can still use his own communication tools. The seller of answers has a special radio transmitter in his hand, and the student has a wireless communication signal receiver in his hand (most of the communication tools currently sold on the market are of this type). The frequency band used by this illegal communication tool can be selected outside the frequency band range that the mobile phone signal jammer can reach, and often infringes on the dedicated frequency band of wireless walkie-talkies. For example, some students use built-in earphones to receive test answers transmitted by wireless communication. Sometimes these earphones are very small and must be taken out of the electromagnetic field. If not, a doctor's help is needed to take it out. Or, the receiving module and other electronic products are hidden in the temples. However, the devil is always better. There is a wireless communication detector that can help to solve the electromagnetic wave data signals in those frequency bands, and the signal jammer on the mobile phone cannot be ignored.

    Before the exam begins, the signal strength of various illegal electromagnetic wave devices such as mobile phones, radio programs, and televisions around the exam room are processed. After the exam begins, the wireless communication detector in the car, the trunk, and the office is running, which can receive all signals in all electromagnetic wave frequency bands. When the tool starts to send answers to the exam room, the detector will "empty a piece" of unknown electromagnetic wave signals, and the tool's signal cannot escape the precise detector ear. When students are in the examination room, when the two parties inside and outside the examination room communicate, the "precious information" such as answers ABCD will first be converted into binary numbers and numbered. If necessary, it will be encrypted, and then the electromagnetic field of the used wavelength will be adjusted to load the information into the radio wave signal, which will be transmitted by the wireless antenna of the transmitter. The other party in the examination room will perform encoding and decoding adjustment to restore the ABCD information. However, with this wireless detector, the signal transmission method used by both parties can be clearly understood within a few seconds. Not only can the signal be detected, but the information inside can even be directly extracted to hear what is said in the conversation. No matter how high-precision the machine used by the offender is, the nature of "parallel perspective" of radio waves must exist. With the help of several detectors placed in different positions, the location of the signal transmitter can be calculated according to the distance and signal blocker, and the sender of the answer can be caught on the spot.
    How does the signal blocker block the signal and how does it work?
    Nowadays, it is very common to install a cell phone signal blocker for the college entrance examination. Its working principle is that when sending and receiving information on your mobile phone, the mobile phone signal blocke...See more
    Jun 14
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  • dojammer
    dojammer uploaded 1 new photo to Newsfeed Photos album
    How to choose a reliable signal blocker? A signal blocker is a device used to block radio signals in electronic devices. It can prevent radio signals from interfering with the normal operation of the device and ensure the stability and reliability of the device. In modern society, signal blocker device have become an indispensable part of various electronic devices. However, there are many types of signal blockers on the market. How to choose a reliable signal blocker? 1. The emergence of signal blockers Signal blockers were originally designed to solve electromagnetic compatibility problems. In electronic devices, electromagnetic interference will occur between various electronic components, which will affect the normal operation of the device. In order to solve this problem, people began to study signal blockers. Signal blockers can block electromagnetic waves, thereby reducing electromagnetic interference and ensuring the normal operation of the device. 10 channels desktop high performance 3G 4G 5G WIFI GPS GSM signal jammer 2. How to choose a signal blocker 1. Understand the signal type of the device Before choosing a signal blocker, you first need to understand the signal type of the device. Different devices use different signal types, and you need to choose the corresponding signal blocker. For example, if the device uses a radio signal, you need to choose a radio signal blocker; if the device uses a pulse signal, you need to choose a pulse signal blocker. 2. Understand the shielding effect of the signal jammer The shielding effect of the signal jammer is one of the important factors in choosing a signal jammer. Different signal jammers have different shielding effects, and you need to choose the corresponding signal jammer according to the requirements of the equipment. Generally speaking, the better the shielding effect of the signal jammer, the higher the price. 3. Understand the brand and quality of the signal jammer The brand and quality of the signal jammer are also one of the important factors in choosing a signal jammer. Choosing a well-known brand of signal jammer can ensure the quality and performance of the product. At the same time, choosing a good quality signal jammer can reduce the failure rate of the equipment and improve the reliability of the equipment. 3. How much is the signal jammer on the market The prices of signal jammers on the market vary. Generally speaking, the higher the price, the better the shielding effect and the more reliable the quality of the signal jammer. According to different needs, choose a signal jammer that suits you. Generally speaking, the price of a signal jammer ranges from a few hundred yuan to a few thousand yuan. In short, choosing a reliable signal jammer requires understanding factors such as the signal type of the equipment, the shielding effect of the signal jammer, the brand and quality of the mobile phone jammer. At the same time, choose a signal jammer that suits you according to your needs. The prices of signal jammers on the market vary, and you need to choose a signal jammer that suits you based on your needs and budget.How to choose a reliable signal blocker? A signal blocker is a device used to block radio signals in electronic devices. It can prevent radio signals from interfering with the normal operation of the device and ensure the stability and reliability of the device. In modern society, signal blocker dev...See more
    Jun 6
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  • dojammer
    What are the advantages of our mobile phone signal blocker and ordinary signal blocking equipment?
    With the continuous development of science and technology, mobile phones have become an indispensable part of people's lives. However, with the popularity of mobile phones, mobile phone signal blocking has also become a problem that cannot be ignored. In order to solve this problem, mobile phone signal blockers came into being. So, what are the advantages of our mobile phone signal blocker and ordinary signal blocker equipment?

    First of all, let's take a look at the emergence of mobile phone signal blockers. Mobile phone signal blockers are a kind of equipment that can block mobile phone signals. It can effectively prevent the transmission of mobile phone signals, so as to achieve the purpose of blocking mobile phone signals. The emergence of mobile phone signal blockers is mainly to solve the needs of some special occasions, such as in public places such as conference rooms, examination rooms, libraries, etc., in order to avoid interference from mobile phones, mobile phone signals need to be blocked. In addition, mobile phone signal blockers can also be used in some special industries, such as military, security and other fields.

    18 Channel Mobile Cell Phone WiFi VHF UHF Lojack Signal Jammer
    In contrast, ordinary signal blocking equipment mainly refers to some equipment that can block radio signals, such as metal shielding boxes, metal shielding bags, etc. These devices are mainly used to protect some sensitive electronic equipment, such as computers, mobile phones, etc., to prevent them from being interfered by external radio signals.

    So, what are the advantages of our mobile phone signal blocker compared with ordinary signal blocking equipment?

    First of all, the advantage of our mobile phone signal jammer is that it can accurately block mobile phone signals. In contrast, ordinary signal blocking devices can only block radio signals and cannot accurately block mobile phone signals. This means that if you need to block mobile phone signals, then our mobile phone signal jammer is a better choice.

    Secondly, the advantage of our mobile phone signal jammer is that it can be used anytime and anywhere. In contrast, ordinary signal blocking devices usually need to be used in specific occasions, such as in a metal shielding box. And our mobile phone signal jammer can be used anytime and anywhere, which is very convenient.

    Finally, the advantage of our mobile phone signal jammer is that it can protect personal privacy. In some public places, such as conference rooms, examination rooms, libraries, etc., if the mobile phone signal is not blocked, it may cause interference to others and may also leak personal privacy. And our mobile phone signal jammer can effectively protect personal privacy and avoid these problems.

    In short, our mobile phone jammer and ordinary signal blocking devices have their own advantages and disadvantages. If you need to block mobile phone signals, then our mobile phone signal jammer is a better choice. If you need to protect sensitive electronic equipment, then ordinary signal blocking devices are a better choice. If you need to buy a cell phone signal jammer, you can consider the 1438 cell phone signal jammer brand, their product quality and service are very good.
    What are the advantages of our mobile phone signal blocker and ordinary signal blocking equipment?
    With the continuous development of science and technology, mobile phones have become an indispensable part of people's lives. However, with the popularity of mobile phones, mobile phone signal b...See more
    Jun 5
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  • dojammer
    dojammer created a new blog post
    What factors affect the interference effect of signal jammers?
    Signal jammer for sale are a type of equipment specifically used to shield wireless signals. Their main function is to prevent terrorists or othe...
    May 31
    0 0
  • dojammer
    dojammer created a new blog post
    How to improve the working effect of signal jammersHow to improve the working effect of signal jamme...
    In modern society, mobile phones have become an indispensable part of people's lives. However, with the popularity of mobile phones, the interference ...
    May 28
    0 0
  • dojammer
    dojammer created a new blog post
    Signal shielding equipment power amplifier has won a successful test by a foreign army
    With the rapid development of modern science and technology, electronic equipment has become an indispensable part of our lives. However, the sig...
    May 27
    0 0
  • dojammer
    dojammer created a new blog post
    What are the main problems of signal shielding instruments?
    In this Internet age, everyone has their own mobile phones and other communication devices, which brings a lot of convenience to everyone's life. Howe...
    May 24
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  • dojammer
    dojammer posted a forum topic
    The birth of a new type of signal interference equipment power amplifier module system
    With the development of science and technology, signal jammer is increasingly used in various fields. Among them, the power amplifier module...
     Discuss 
    May 20
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  • dojammer
    dojammer created a new blog post
    What is the power adjustment function of the wireless signal jammer?
    Most of the common wireless signal jammers on the market do not have power adjustment functions, such as signal shielding equipment used for...
    Jan 2
    0 0
  • dojammer
    dojammer created a new blog post
    What should you pay attention to when choosing a conference room signal jammer?
    In order to avoid being interrupted by the sudden ringing of mobile phones during the meeting, or to allow participants to concentrate on listening to...
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