The first is to identify or confirm that the shielding device itself has no quality problems and is working normally (for example, if the shielding device is replaced in other environments, the shielding effect is relatively normal), and then confirm the distance of the base station around the site where the shielding device is used and whether there is a signal amplifier. . It is generally recommended that there should not be a large base station within three or four hundred meters or that the base station (mobile phone signal tower) can be directly seen within the line of sight. If there is a signal amplifier, it is recommended to turn off the amplifier and then test the mobile phone shielding device. After completing the above two steps, then analyze the height and installation environment of the shielding device. It is recommended that the installation height of the shielding device is 1.8 meters to 2.5 meters, so that the signal of the shielding device can be directly transmitted and covered as much as possible to avoid objects. Blocking the signal produces signal refraction and reflection. In addition, if the direction of the signal from the base station entering the room is analyzed, it is recommended to install the mobile phone shielding device on the wall on the side of the window where the signal from the base station enters the room.
