Mobile phone signal jammers have become standard equipment in the examination room. Not only the high school and college entrance examinations, but also postgraduate examinations, civil service examinations and various qualification certificate examinations, Cell Phone Jammer Circuit Using 555 Timer are required to prevent candidates from communicating with the outside world through wireless signals. In the examination room using our mobile phone signal jammer, various mobile phone signals (2345G), wireless intercom signals, Bluetooth WiFi signals, etc. will be blocked by interference. So let’s talk about cell phone jammers, cell phone jammer Why can interfere with your cell phone signal? We can compare a mobile phone to a radio for the time being. The radio often churns or the channel is simply disorganized and cannot be heard. This is the signal is disturbed. Since the radio can be disturbed, the mobile phone can be the same. And interfere with some devices.
For the uplink and downlink channels of the mobile phone system, it uses techniques such as frequency multiplication, frequency division, and frequency hopping filtering to analyze the required shielding frequency; customize a spherical shielding space according to the size of Cell Phone Jammer Circuit Using 555 Timer Power , and automatically form a shielding magnetic field within the specified range. Make mobile phones (including PHS-"PHS GSM-China Unicom, China Mobile, CDMA-China Telecom) mobile phones in this space invalid. When the mobile phone jammer is in the working state, it can disable the signal receiving and sending functions of the mobile phone within the specified range, and cannot dial out and dial in, so as to achieve the purpose of compulsory prohibition. The principle of radio communication: within a certain frequency range, the mobile phone and the base station are connected by wireless electromagnetic waves, and the data and sound transmission is completed with a certain baud rate and modulation method. The communication principle of the mobile phone signal jammer, the mobile phone 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 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 is manifested as a search network, no signal, no service system and other phenomena.
