The mobile phone signal jammer with built-in antenna is even easier to use. Just plug in the power and turn on the switch.The working principle of mobile communication is that within a certain frequency range, wireless devices (mobile phones, etc.) communicate with the base station through radio waves, and complete data and sound transmission with a certain baud rate and modulation method. Many users who use mobile phone wifi jammer do not understand its working principle, and often exceed the frequency range when using it, resulting in poor use.
Conference room signal shielding device. Many friends will ask me that I don’t want to let the phone call in during a meeting in the meeting room to disturb the progress of the meeting. What should I do at this time? In fact, this situation is very easy to solve, which is to use the special mobile phone signal shielding for Jin Yuda meetings. Many companies will install cell phone jammer in conference rooms. The main reason is that they don’t want the call to interfere with the progress of the meeting.The device will do.When using an external mobile phone signal jammer with antenna, lock the letter on the antenna corresponding to the letter on the host, and then turn on the power.
The mobile phone communicates with the base station through the uplink frequency, and then transfers the signal to the mobile service switching center to realize the call. Once there is a call demand, it will be allocated to the mobile phone service channel according to the specific conditions of the channel near the terminal through the request, so that the mobile phone can jump to the service channel to realize the call and data transmission . At the same time, wireless communication must ensure a sufficient signal-to-noise ratio to effectively receive and complete communication.In the standby state, the mobile phone communicates with the base station through the broadcast control channel.