{"id":3396,"date":"2024-07-23T02:30:00","date_gmt":"2024-07-23T02:30:00","guid":{"rendered":"https:\/\/www.jammersignal.com\/?p=3396"},"modified":"2024-07-15T08:52:49","modified_gmt":"2024-07-15T08:52:49","slug":"how-do-jammers-work-and-how-to-crack","status":"publish","type":"post","link":"https:\/\/www.jammersignal.com\/fr\/how-do-jammers-work-and-how-to-crack\/","title":{"rendered":"Comment fonctionnent les brouilleurs de signaux et comment les d\u00e9crypter ?"},"content":{"rendered":"\n

There are generally two ways to shield mobile phone signals:<\/p>\n\n\n\n

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  1. Use a metal mesh bag: This method is similar to the principle of closed-circuit television. Putting the mobile phone in a metal mesh bag can basically shield all electromagnetic waves.<\/li>\n\n\n\n
  2. Signal interference: In some areas, mobile phones may lose signals due to the presence of electromagnetic wave transmitters. This transmitter works on the same frequency as the mobile phone, interfering with the signal transmission of the mobile phone.<\/li>\n<\/ol>\n\n\n\n

    At present, the mobile phone signal blocker on the market uses the method of signal interference. Although the principle is simple, it is illegal to use this frequency band privately and cannot generate commercial value. However, schools have begun to use signal blockers to prevent cheating. Let’s learn how it works.<\/p>\n\n\n\n

    1.Working principle of mobile phone signal blocker: interference with downlink signals<\/p>\n\n\n\n

    Here is a specific schematic diagram to illustrate this process:<\/p>\n\n\n\n

    When a mobile phone is in use, it will work within a specific frequency range. The mobile phone and the base station use radio waves to transmit data and sound at a certain baud rate and modulation method. Based on this communication principle, the mobile phone signal blocker will scan the frequency range of the forward channel from low end to high end at a certain speed during operation. This scanning speed will cause garbled interference in the message signal received by the mobile phone, and the mobile phone will not be able to detect the normal data sent by the base station, which will cause the mobile phone to be unable to establish a connection with the base station, resulting in no network search, no signal, no service, etc.<\/p>\n\n\n\n

    \"high<\/a><\/figure>\n\n\n\n

    Simply put, the mobile phone signal blocker blocks the downlink frequency of the base station signal.<\/p>\n\n\n\n

    2.Specific implementation of the function of the mobile phone signal blocker:<\/p>\n\n\n\n

    Common specifications include a shielding range of 10 meters, a DC power supply of 5V, etc.<\/p>\n\n\n\n

    3.Basic performance:<\/p>\n\n\n\n

    The performance parameters of most cell phone signal jammers<\/a> on the market are as follows:<\/p>\n\n\n\n