The difference of signal jammers is caused by the power and number of channels of the signal tower, the distance from the site, and the size of other nearby buildings, landforms and landforms, resulting in different signals in the area. Because the building structure, local base station direction, power, terrain and other factors are different, the mobile phone signal strength, channel number and frequency band in each region are different. In addition, radio waves are invisible and untouchable, and their transmission process is affected by various factors. In the actual use environment, there may be dozens of channels in the same environment for the user's mobile phone to automatically select. At the same time, there are spatial field strength differences between indoor and outdoor, and the interference signals of the ground and metal objects on the mobile phone can cause very complex adverse effects. At this time, we will feel that in different regions, some mobile signals are strong, some Unicom signals are strong, and the signals in the same place are strong and weak. At this time, the Signal Jammer reflects the differences in different environments.

At this time, a detailed field survey of the environment can be carried out. The survey needs to interfere with the regional environment and understand the actual requirements of customers. Thoroughly analyze the local signal distribution and building structure. The working frequency band of the Signal Jammer shall be improved by using general equipment for positioning and measuring with a series of instruments.