Test the effective shielding distance of mobile phone signal jammer
1. Prepare smartphones in several frequency bands in advance, including: China Mobile GSM, China Unicom WCDMA, PHS, 3G (preferably, there are 3 modes of 3G: China Mobile TD-SCDMA, China Unicom CDMA2000, China Telecom WCDMA), and then turn on the mobile phone signal Shielding device, holding various smart phones in hand, inspecting the effective shielding radius of the shielding device and the shielding spacing in many directions from near to far from the assembly position of the mobile phone shielding device.
2. When inquiring whether the mobile phone is blocked or not, be careful not to check the signal grid number on the mobile phone alone. Because the signal grid number on the mobile phone is sometimes falsely reported, it does not symbolize the true communication status of today's smart phones. Don't come to the conclusion early that this cell phone jammer has no effect. Instead, you should dial the smart phone intermittently, and be able to try to dial a local toll-free number or a fixed landline number. If the dial is blocked, it is judged to be still in the scope of the screen fraud. If it is determined that the dial can be connected, it indicates Has exceeded the scope of screen fraud.
3. To check whether a certain location point is within the scope of screen fraud, you should hold the smart phone in your hand for the above time period of 30 seconds to determine whether the smart phone is blocked.
4. If you move from a non-screened area to a screened area, your smartphone will usually be completely blocked after you walk into the screened area for a long time. This is mainly because the smart phone can be used to talk to the phone. , The smart phone itself has the level of anti-interference, this kind of anti-interference will enable the smart phone to independently adjust the output power to ensure this regular voice call. Therefore, it is generally not recommended to carry out daily dynamic inspections in the case of voice calls, but to carry out static inspections at various positioning points.
5. If you move from a non-screened area to a screened area, your smartphone will usually be completely blocked after you walk into the screened area for a long time. This is mainly because the smartphone can be used to talk to the phone once it is dialed. , The smart phone itself has the level of anti-interference, this kind of anti-interference will enable the smart phone to independently adjust the output power to ensure this regular voice call. Therefore, it is generally not recommended to carry out daily dynamic inspections in the case of voice calls, but to carry out static inspections at various positioning points.
The above is the approximate process and method of checking the spacing of the mobile phone signal jammer. You must try a few more times, it is easier to find the spacing of the screen fraud.
