The shielding range of the signal jammer is not fixed

　　The signal jammer gps scans the channel from low to over-exit frequencies at the same rate throughout the operation. This scanning speed will cause garbled interference in the message signal received by the mobile phone, making it impossible for the mobile phone to detect ordinary microwave signal records introduced from the base station. In the plan, the cell phone cannot establish a reference to the underlying station, thereby gaining a reason to defend the cell phone signal.

　　Simply put, it is to control the base station by interfering with the frequency of the mobile phone through the frequency introduced by the mobile phone signal jammer. Jammers and base stations are destined to be an aggressive connection. If the transmission power of the signal jammer is much smaller than the channel transmitted by the base station to the mobile phone in the environment. If the strength of the signal jammer is greater than the power of the base station on the phone, the protection tool will now be ineffective. Therefore, any shielding tool will show a clear defense interval when used in a specific signal environment, China Mobile, China Unicom and China Telecom can be one of them, because the base station density, base station direction and base station strength are constructed by these three of. Operators cannot be the same.

　　The number of meters that a mobile phone jammer can shield has nothing to do with its own transmission power, and it is also related to the distance between base stations in the use environment. Signage amplifying antenna at the top and signage amplifying distribution for several homes, another key issue is the obstruction, if it is a metal cloth, it will be blocked immediately; if it is a solid concrete wall, the attenuation after penetration will be much less . 10x; very little attenuation after penetration if it is far plank or pitcher fabric.

　　So how many meters should be shielded next, the distance between the inner bottom stations of the environment, the number of kilometers used indoors or outdoors, whether it is necessary to pass through the wall, and so on. Only by using this information can better selection of suitable signal jammers be made.