The function of the mobile phone signal blocker is to block the signal. It is used in many occasions. The most used occasions we have come into contact with is the examination room. Now the speed of information dissemination is very fast. With a mobile device, all kinds of information can be disseminated to all corners in an instant. For some occasions where information cannot be disseminated, cell phone signal jammers are very necessary. The following small series will introduce to you the principle, function and price of mobile phone signal jammer.
1. Introduction to the principle of mobile phone signal jammer:
1. The principle of mobile phone (radio communication) 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. 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.
2. Features of cell phone signal jammer:
Only shield the mobile phone signal, does not affect the normal operation of other electronic equipment
It only shields the mobile phone signal in the test room, and does not interfere with the mobile phone outside the test room, let alone the base station.
Only the downlink frequency of the transmitting base station is shielded without affecting the uplink frequency
Green and environmentally friendly, the electromagnetic field intensity is far lower than the national standard, and has no impact on the human body
The operation is simple, the antenna is installed correctly, and it can run automatically when the power is turned on.
Third, the use of mobile phone signal jammer features
1. Select the area where you need to cut off the mobile phone signal, 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.
4. The transmission frequency range of the mobile phone signal jammer
(1)869 - 894 MHz
(2) 925 - 960 MHz
(3)1780-1920MHz
(4)2010 - 2145 MHz
(5) 2300 - 2485MHz
(6) 2515 — 2675MHz
(7) 3400 - 3600MHz
(8) 4800 - 4900MHz
(9) 5125 — 5350MHz
(10) 5725 — 5850MHz
Shielded frequency bands: CDMA800, GSM900, SCDMA1800, DCS1800, PHS1900, TD-SCDMA(Mobile 3G), CDMA2000(Telecom 3G), WCDMA(Unicom 3G), 4G, 5G, 2.4G(WIFI), 5.8G(WIFI)
Fourth, the price of mobile phone signal jammer
The price of a cell phone signal jammer is 400 yuan to 4,000 yuan.
What is the price of the cell phone signal jammer, what is the working principle of the cell phone signal jammer, and what functions the cell phone jammer has, the editor has given you a detailed introduction above. Mobile phone signal jammers are used in many occasions, because the current level of informatization is getting higher and higher, and many hard research results are likely to be easily spread. This effect is very bad. . So it is very necessary to use a cell phone signal jammer.