The function of cell phone signal jammer is to block signals. It is used in many occasions. The most common use occasion we come into contact with is in the examination room. Nowadays, information spreads very fast. With a mobile device, all kinds of information can be spread to every corner in an instant. For some occasions where information cannot be spread, mobile phone signal jammers are very necessary. The editor below will introduce to you the principles, functions and prices of mobile phone signal jammers.

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, mobile phones and base stations are connected through radio waves, and data and sound transmission are completed with a certain baud rate and modulation method.

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2. Based on the above communication principle, the jammer scans from the low-end frequency of the forward channel to the high-end at a certain speed during the working process. This scanning speed can cause garbled interference in the message signals received by the mobile phone. The mobile phone cannot detect normal data sent from the base station, making it impossible for the mobile phone to establish a connection with the base station. Mobile phones show symptoms such as searching the network, no signal, and no service system.

2. Functional features of mobile phone signal jammer:

It only blocks mobile phone signals and does not affect the normal operation of other electronic devices.

It only blocks mobile phone signals in the examination room and does not interfere with mobile phones outside the examination room, let alone the base station.

Only the downlink frequency of the transmitting base station is blocked 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.

Simple operation, install the antenna correctly, and it will run automatically when the power is turned on

3. Features of using mobile phone signal jammers

1. Select the area where the mobile phone signal needs to be cut off, and place the cutter on the table 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 equipment is connected, press the power switch disconnector to start working. At this time, all powered mobile phones on site are in the search network state and lose the base station signal. Neither the calling party nor the called party can establish a call connection.

4. Transmission frequency range of mobile phone signal jammer

(1)869 - 894 MHz

(2)925 - 960 MHz

(3)1780 - 1920 MHz

(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 (China Unicom 3G), 4G, 5G, 2.4G (WIFI), 5.8G (WIFI)

4. Price of mobile phone signal jammer

The price of a mobile phone signal jammer is 400 yuan to 4,000 yuan.

What is the price of a signal jammer, how does a mobile phone signal jammer work, and what functions does a mobile phone signal jammer have? The editor has given you a detailed introduction above. There are many use cases for mobile phone signal jammers, because the level of informatization is getting higher and higher now, and many hard-working research results are likely to be easily disseminated. This impact is very bad. . So it is very necessary to use a mobile phone signal jammer.