Do Truck Stops Block Cell Phones
How to test the effective shielding distance of mobile jammers? Many users say that mobile phone jammers are not effective and the actual shielding radius is short, but many of them are caused by wrong methods. So the editor today will introduce to you an accurate and fast method, how to detect the shielding range of Do Truck Stops Block Cell Phones on the spot? The most feasible method is to test a variety of mobile phones on site. The detection should not be too one-sided: Use multiple mobile phones with multiple frequency ranges to test the shielding effect of mobile phone jammers on the spot. This is the most convenient, most trouble-free, and most feasible test method. Compared with the limitations of passing the mobile phone test software, and the need to convert after passing the professional instrument test, this method is the easiest for users to grasp. The method is as follows: prepare mobile phones with multiple frequency bands, including: China Mobile, China Unicom, PHS, 3G (preferably with three modes of 3G: Mobile TD-SCDMA, China Unicom CDMA2000, Telecom WCDMA), then turn on the mobile phone jammer and hold it in your hand For each mobile phone, test the effective shielding radius of the mobile phone jammer from near to far from the mobile phone jammer installation position. It is recommended that the user should test the shielding distance in multiple directions with the mobile phone signal jammer as the origin at the same time during the test. cell phone jammer
When checking whether the mobile phone is shielded, you should pay attention not to just check the signal grid number on the mobile phone, because the signal grid number on the mobile phone is sometimes false and does not represent the current mobile phone communication situation. At this time, we must not draw conclusions too early. This Do Truck Stops Block Cell Phones has no effect. Instead, you should dial the mobile phone intermittently. You can try to dial a local toll-free number or a fixed landline number. If the call fails, it is judged to be still in the shielding range, otherwise, it means that the shielding range is out of range. After the multiple frequency bands are tested, the shortest shielding radius of a certain frequency band is selected as the effective shielding radius of the mobile phone jammer in this area. This can be used to estimate the location when deploying large-area honeycomb dots. The above is a very effective and simple way to test the jammer radius of the mobile phone jammer in this environment, but it should not be judged prematurely. The shielding effect of this mobile phone jammer can only be so far, and you should also check whether there are base stations around, and the environment Factors have a great influence on the shielding effect. If the mobile phone jammer can meet the requirements of the examination room, it can be used with confidence. If you dial the phone from the unshielded area to the shielded area, you will often walk into the shielded area for a considerable distance before the mobile phone is completely shielded. This is because once the mobile phone is dialed, the mobile phone itself has the ability to resist interference. This kind of anti-interference will make the mobile phone adjust its transmitting power to ensure the normal call this time. Therefore, it is generally not recommended to perform dynamic testing in the call state, but to perform static testing at various points.