Bag Block Cell Phone Signal
How to effectively prevent the abuse of mobile phones in theaters, ensure order, and allow normal meetings to continue in a quiet and serious atmosphere, so that audiences will not be disturbed when watching movies and enjoying theatrical performances. When the mobile phone is muted or vibrated, the Bag Block Cell Phone Signal system can only be installed in the appropriate location of the theater by means of hardware to block the mobile phone signal. Faced with a mysterious figure who is frequently active in major examination rooms, I believe that many people do not know its true colors. It is a good helper for the promotion of large and small exams in schools, and can effectively prevent and prevent cheating. - Cell phone signal jammers. Now that the college entrance examination is approaching, many schools are looking for a batch of cell phone jammer equipment with higher performance to ensure a stable order in the examination room during the college entrance examination.
Now our mobile phone communicates with the base station through the uplink frequency, and then transmits the signal to the mobile switching center to realize the call. In the standby state, the mobile phone communicates with the base station through the broadcast control channel. Once there is a call request, it will be allocated to the mobile phone service channel according to the specific conditions of the channel near the terminal according to the request, and let the mobile phone jump to the service channel to realize the call and data transmission. At the same time, 4G wireless communication must ensure a sufficient signal-to-noise ratio to Effectively receive and complete communications. Then according to the above working principle, we can conclude that Bag Block Cell Phone Signal is generally composed of power supply, electronic sampling control unit, segmented high-frequency module unit, power amplifier unit, transmitting antenna unit and other parts. The sampling signal generated by the signal generator passes through the inverter, enters the oscillator, and is modulated to the working frequency band of mobile communication.