topsignaljammer's blog

• Wide application areas

Cell phone jammers are mainly used in examination rooms, but are not limited to examination rooms. They can also be used in prisons, gas stations, oil depots, liquefied gas stations, detention centers, interrogation rooms, courts, labor reform teams, conference rooms, theaters, churches, libraries, and schools. It will only be used in dormitories, special security and confidentiality occasions (confidential offices, negotiation rooms, mobile vehicles, mobile political and business dignitaries guarding sites), etc.


• Strong pertinence

Cell phone signal jammer can mainly be used for domestic college entrance examinations, domestic postgraduate entrance examinations, adult college entrance examinations, self-study examinations and various college and university examinations, as well as various middle schools, technical secondary schools, vocational high schools, prisons, detention centers, conference rooms, etc. to use mobile phones to cheat, send random text messages, Negative effects caused by communication with persons outside prison and collusion in confessions.

• Diverse signals to be shielded

Effectively shield GSM/CDMA/DCS/PHS/TD-SCDMA/WCDMA/WIFI/TD-LTE/FDD-LTE.

• Model advantages

There are many names for 5G signal jammers, such as signal jammer, mobile phone shielding, signal interference, data signal influencer, data signal shielding, mobile communication technology signal interference, data signal shielding, cell phone signal jammer, signal shielding, and wireless communication signal shielding.

For the upper and lower security channels of the mobile phone system, technologies such as memory overclocking, frequency division, and frequency hopping filtering are used to analyze the necessary shielding frequency; a spherical shielding indoor space is formulated according to the signal shielding output power, and shielding will be automatically generated within the specified range. Electromagnetic fields make mobile phones ineffective in indoor spaces. When the signal shielding is in operation, the data signals sent and received by mobile phones within a specific range are invalid, which means that the phone cannot make calls and receive calls, thus achieving the purpose of forcibly prohibiting use.

The working principle of 5G signal jammer: Within a certain frequency range, mobile phones and communication base stations are connected to each other based on electromagnetic waves, and adopt a certain serial baud rate and configuration method to transmit data information and sound.

The shielding range of the 5G jammer is based on the output power of the signal jammer. During on-site testing, the high and low shielding ranges of signals in the local environment are different. For example, if the indoor signal has a weak shielding range and a large range, a GSM base station should be equipped outdoors, so the GSM signal is close to the outdoor shielding range.

The heat dissipation types of high-power cell phone signal jammers are divided into the following two types:

High-power cell phone signal jammers that use natural heat dissipation generally use fully sealed heat dissipation shells. The host is the shell, and the shell is the radiator. The switching power supply, radio frequency module and other components used by all devices are all integrated inside the device. The shell material is generally They are all aluminum and are die-cast with different molds. They are generally used in places with harsh external environments, such as places with a lot of sand and dust, or places that need to be equipped with explosion-proof boxes, such as gas stations, oil depots, hazardous chemicals warehouses, etc. Cell phone signal jammers that use this kind of heat dissipation shell generally require wide coverage, strong ability to adapt to harsh environments, and ensure the normal operation of the internal radio frequency module through natural heat dissipation.

There are many types of high-power cell phone signal jammers that use auxiliary fans to dissipate heat. The radiators used in this type of cell phone signal jammers are mainly aluminum profiles. After cutting, the chassis shell is installed, and the RF module and power light components are installed. Installed in the chassis. The heat dissipation is divided into two parts. One part is to extract the heat from inside the chassis and send the air from outside the chassis to the inside to form air convection and transport the heat to the external environment. The second part is to install the fan in the heat dissipation tooth area corresponding to the radiator module, and then the fan dissipates heat to the place that generates more heat to ensure the normal operation of the internal RF module.

The vast majority of common wireless signal jammers on the market are not with power adjustment, such as for the examination room signal shielding or for the venue signal shielding, but there will still be a part of the customer base, they are hoping that the shielding equipment has the function of power adjustment. Why is there such a demand? This is the customer does not want to interfere with the signal range is too large, thus affecting or interfering with other unrelated areas, then, with the power to adjust the wireless signal jammer, it is the overall adjustment or frequency band to adjust the transmit power?

Standing in the customer user's point of view to look at this issue, the customer is of course, hope that the wireless signal jammer power adjustment operation, can be simple, convenient and fast to achieve the purpose. For example, through a physical power adjustment knob can realize the output power size adjustment. However, the final result provided by the manufacturer is that such an adjustment function is actually difficult to realize. That is to say, a simple potentiometer knob is basically not feasible for overall power adjustment.

Why did we come to this conclusion? That is because the wireless signal jammer for a variety of frequency bands, standard signals, is divided according to the frequency band, by at least ten or more shielding modules. Each shielding module only for the current frequency band signal interference. We take cell phone signals as an example, different frequency bands, different systems of cell phone signals, even in the same location, it received from the base station signal strength, in fact, there are differences. The result of this difference is that the wireless signal jammer for different frequency bands, different systems of cell phone signals, the effective shielding distance there are differences, and sometimes the difference is also very large. If the use of just an adjustable potentiometer on the wireless signal jammer for the overall power adjustment is obviously not appropriate, the correct approach must be for the different frequency bands for individual adjustment. This is why we can see the situation is: where the wireless signal jammer with power adjustment function, its power adjustment knob number is very much, and the number of these adjustment knobs and shielding module is a one-to-one correspondence.

Finally, but also additional reminder: for a wireless signal jammer power adjustment, relatively speaking, is the effective shielding range can be accurately controlled, but if the user only rely on the power adjustment knob adjustment can only be done to achieve a general regulation, if you want to achieve a more accurate range control, we recommend that the manufacturer of the wireless signal jammer, carrying a professional wireless signal spectrum analyzer. If you want to achieve a more precise range control, we suggest that the manufacturer of the wireless signal jammer should carry a professional wireless signal spectrum analyzer with the help of the spectrum analyzer to display and analyze the power at the same time of adjusting the power level, so as to achieve the final ideal effect.