Cell phone jammers can only block mobile phone signals and have no effect on other electronic devices. The electromagnetic signals emitted by mobile phone signal jammers are completely within the specified mobile operating frequency band and can only block mobile communications. Moreover, such signals are always in a relatively static state and will not affect any electronic devices.
During the working process, the mobile phone signal jammer scans the low-end frequency of the previous channel to the high-end frequency at a certain speed. This scanning speed will cause garbled interference in the information signal received by the mobile phone. The mobile phone cannot detect normal data from the base station, resulting in the inability to establish a connection with the base station. The phenomenon presented by mobile phones is a paging network. Mobile phones have no signal and no service system.
At present, signal blcokers are all full-band. It can block all 2G3G4G signals, 2.4GWIFI signals and Bluetooth signals. These signals are sent by the three operators of China Mobile, China Unicom and China Telecom. The principle is to interfere with mobile phone reception. The frequencies emitted by the base stations and wireless routers are reached to achieve shielding.
Therefore, other electronic devices other than the above frequencies can work normally.
But if the frequency is too close to the frequency of a mobile phone signal jammer, it will also be interfered, such as a wireless microphone of about 700 megabits. This is very close to the frequency of CDMA (870-880MHz), making the wireless microphone unable to work properly at this time.