By the annual exam season, all parties have begun to prepare for the exam. The invigilator has various tricks to prevent high-tech fraud. Among them, the Cell Phone Signal Jammer Legal In Us in the exam room is still an anti-fraud jammer. But Chengdu Saiyue Communication reminded, cell phone jammer There are many types and models. Before purchasing, users should clarify their own needs to avoid test room accidents due to poor shielding effects. They are also paying attention to the correctness of the method of use.
I want to be clear about the place of use. Most schools use exam room type Cell Phone Signal Jammer Legal In Us which is suitable for long-term work and is durable. The second is how large are we in the shielded area? For example, a room of 100 square meters or a venue of thousands of square meters. If the area is large, the Power should be larger, and if the area is small, you should consider choosing a smaller shielding Power . Then there is which frequency bands need to be shielded. Are all China Mobile, China Unicom, Telecom and CDMA shielded? Still only need to shield part of the frequency band. At this time, we remind everyone that if you want to buy a suitable mobile phone jammer to achieve the effect, it depends on the method used. The main points are as follows: 1. Indoor mobile phone jammers are recommended to be placed at a height of about 180cm-220cm above the ground, and the angle is preferably forward. 2. Whether there are obstructions (such as walls, metal products, etc.) between the mobile phone jammer and the wireless communication equipment (mobile phone, etc.). The interference signal emitted by the signal jammer will be attenuated to varying degrees after passing through the obstruction, please try to avoid it. 3. The weaker the wireless communication signal strength in the use environment, the stronger the theoretical shielding effect of the shielding device. 4. The farther the jammer application environment is from the signal tower, the stronger the theoretical shielding effect of the mobile phone jammer.
