An overview of the principle of mobile phone signal jammer:
1. Introduction to the principle of mobile communication: The working principle of a mobile phone is as follows: within a certain frequency range, the mobile phone and the base station are connected by radio waves to complete the transmission of data and sound with a certain baud rate and modulation method.
2. Introduction to the principle of mobile phone signal jammer
According to the above communication principle, the jammer scans from the low-end frequency of the forward channel to the high-end frequency at a certain speed during the working process. The scanning speed can cause garbled interference in the message signal received by the mobile phone, and the mobile phone cannot detect the normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station. The mobile phone manifests as the phenomenon of searching the network, no signal, no service system, etc.
3. Basic functions: 1. Effectively shield CDMA, GSM, PHS and other mobile phones. 2. Only shield mobile phone signals, without affecting the normal operation of other electronic equipment.
The fifth generation 8 channel 3G mobile phone signal jammer
In view of the continuous development of communication standards, the third-generation 3G mobile phone signal jammer has been carefully developed according to the actual situation of foreign mobile communication. The difference between the jammer and the ordinary mobile phone signal jammer is that it can not only shield ordinary mobile phone signals, but also must completely cover the three frequency bands of the three domestic mobile communication operators. The 3G frequency bands used by the three domestic mobile communication operators China Mobile, China Unicom and China Telecom are as follows: China Mobile 3G frequency band (2010-2025MHz), China Telecom 3G frequency band (2110-2125MHz), China Unicom 3G frequency band (2130- 2145MHz).
How to use a mobile phone signal jammer
1. Select the area where the cell phone signal needs to be cut off, and place the cut-off device on the desktop or wall in this area.
2. After the installation is completed, turn on the power of the disconnector and turn on the power switch.
3. After the device is connected, press the power switch and the disconnector to work. At this time, all the mobile phones on the site are in the state of searching for the network and lose the base station signal. Neither the calling party nor the called party can establish a call connection.
Portable cell phone signal jammer adopts imported IC and self-developed, especially for some small places at home and abroad that need security and confidentiality, such as confidential offices, negotiation rooms, mobile vehicles, mobile political and business circles, and important people guarding the scene. etc., according to the actual situation of mobile communication at home and abroad, it is a high-tech product that has been successfully developed. It can block GSM/CDMA/DCS/PHS/PCS/3G mobile phones within a radius of 0.5-15 meters (usually about 5-80 square meters). Signal (enhancement can block GPS signal), so that mobile phones in the area cannot make and receive calls, and will not interfere with the work of other electronic devices in the environment. When the phone is far away from the shielding range, it can resume normal use.
The machine is easy to carry and concealed, small in size, light in weight, weighing only 150 grams; simple operation, low power consumption, only 0.5W/h, and up to 2-3 hours of use; easy to charge, it is a truly green and environmentally friendly handheld type shield.