According to the website of the Ministry of Education, the 2021 national college entrance examination will be held on June 7. If the name of the test subject in each province (region, city) is the same as the subject name of the national test, the time arrangement of the national test must be the same. To ensure the fairness of the results, relevant departments can use Cell Phone Jammer Kit Ebay . The examination room needs to strengthen discipline and restraint, and has special supervisors, invigilators, etc. to supervise the examination process, and any cheating is prohibited. In addition, mobile phone signal jammers are also suitable for military, government agencies, prisons, gas stations and other places where mobile communications are prohibited. cell phone jammer Provides an effective solution to this problem. You can block cell phone signals within a certain radius.
The mobile phone signal jammer communication principle, 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. 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 Kit Ebay 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 make the mobile phone's signal receiving and sending function in the specified range invalid, unable to dial out and dial in, so as to achieve the purpose of compulsory prohibition.
