In the exam season each year, all parties begin to prepare for the exam. The invigilator has various tricks to prevent high-tech cheating. Among them, the special signal jammer device for the exam room is still an anti-jammer. However, Foshan Shangkino, as a well-known manufacturer of signal jammers, reminds that there are many types of jammers, and users should clarify their needs before purchasing, so as to avoid poor shielding effects and accidents in the examination room, and pay attention to the method of use. Correctness.
First of all, I want to clarify the place of use. Most schools use test room-type mobile phone shields that are suitable for long-term work and are durable. The second is how large are we in the shielded area? For example, if it is a room of 100 square meters or a venue of thousands of square meters, if the area is large, the power must be larger, and if the area is small, consider choosing the shielding power adjustable. 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 the best results can be achieved by purchasing a suitable shielding device, and it depends on the method used. The most important ones are the following:
1. It is recommended to place the indoor shielding device at a height of about 180cm-220cm from the ground, and the angle is better to lean forward.
2. Whether there are obstructions (such as walls, metal products, human bodies, etc.) between the jammer and wireless communication equipment (mobile phones, etc.). The interference signal emitted by the jammer will be attenuated to different 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 jammer.
4. The farther the jammer application environment is from the base station, the stronger the theoretical shielding effect of the jammer.
The above is the information on the purchase guide and use items of the signal jammer. I hope to help you.