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13 Oct. 2022 Andrew

What is a cell phone jammer and how does it work?

Cases of exam fraud have occurred over the years, and it has become a problem that the education sector pays more and more attention to. With the development of technology, more and more people use mobile phones to cheat. In order to ensure the information security of the examination room, some ordinary colleges and universities generally use Cell phone signal jammers to interfere with external signals within a certain range. Today, I will talk to you about how mobile phone jammers interfere with mobile phone signals.

Cell jammer in the exam rooms

How does cell jammer interfere with cell phone signals?

First of all, you need to understand the working principle of mobile communication. Simply speaking, it is within a certain frequency range. The mobile phone and the base station communicate through radio waves to complete the transmission of data and sound with a certain baud rate and modulation method.

When the mobile phone communicates, it contacts the base station through the uplink frequency, and then transfers the signal to the MSC (Mobile Service Switching Center) to realize the call. In the standby state, the mobile phone communicates with the base station through the BCH broadcast control channel. Once there is a need for a call, it first asks the MSC through the BCH for instructions. implement the call.

In electronics, signals are disturbed by signals generated by some external energy (such as stray electromagnetic fields) during transmission, which are often referred to as "noise". The cell jammer transmits the same frequency white noise by simulating the frequency of the mobile phone signal to interfere with the signal transmission and reception between the mobile phone and the signal tower, so as to achieve the purpose of signal distortion.

What is a cell phone signal blocker?

A mobile jammer is an electronic communication device that can interfere with the signal between a mobile phone and a base station. It is often used in special places where mobile phones are disabled, such as examination rooms, confidential laboratories and other special places.

How do cell phone jammers work?

Its working principle is to implement co-frequency electromagnetic interference on the wireless network on which mobile phone communication depends, so that the mobile network cannot communicate normally, so as to achieve the purpose of interference. The cell phone signal blocker only blocks cell phone signals and will not affect other electronic devices.

In addition, it is also necessary to ensure that the signal field strength of the jammer is stronger than or even much larger than the field strength of the mobile signal in the interference area. Therefore, if the signal strength of the interference area is relatively large, we will recommend customers to purchase high-power cell jammers. In particular, the closer the interference location is to the base station, the stronger the BCH field strength, the smaller the effective blocking area, and the worse the interference effect. (This is also one of the reasons why many customers report that the actual jamming distance of the jammer may not reach the jamming distance described on the website).

Jammermfg is a comprehensive high-tech enterprise integrating R&D, production, sales and interference solutions. The company is mainly committed to the R&D and production of signal shielding equipment. In this field, it has successively developed and produced 100+ mobile phone signal shielding equipment and 500+ signal jamming solutions. Praise and affirmation, some series of products have been widely used and supported in prison system, military and various examinations.