This is because the power intensity of signal base stations built by different operators in different regions is different, and the distance between the base station and the place of use is also different. The nearby buildings are also different from the terrain and landform, as well as the material of objects. This will also have some impact on the signals in various regions, which will greatly reduce the effect of the jammer. The wireless signal is invisible and can not be touched, and is easily interfered by various factors in ordinary times. In the actual use of frequency jammer, the environment, power, distance and other factors, plus indoor and outdoor magnetic field differences, especially metal items will also affect the use of frequency jammer.

In view of the above situations, we can survey the environment in the shielded area, understand the customer's needs, survey the terrain and landform on the spot, and comprehensively solve the potential problems. Special instruments and equipment shall be used to analyze the local signal distribution, building structure, etc. to select the applicable frequency jammer. Through the investigation of the site environment and terrain and the understanding of the signal, we can solve and deal with various problems on the site in a timely manner according to this information. At present, the signal jamming technology has matured, and now the frequency jammer has fully met the needs of large construction sites. It can reduce the impact of some uncertain factors by using professional equipment to analyze field data and provide customers with the best solution.