Every year in the exam season, all parties begin to prepare for the exam nervously, and the invigilators also have their own methods to prevent high-tech cheating, and the special screening staff of the exam room is one of them. There are many kinds of shields. Users should clarify their needs before purchasing, avoid examination room accidents caused by poor shielding effects, and pay attention to the correctness of the method of use.
First, it is necessary to figure out where to use it. Most schools use test room-style mobile phone shielding, suitable for long-term work and durability. Secondly, how big is our shielding area? For example, a room of 100 square meters or a meeting place of several thousand square meters. If the area is large, the power should be large, if the area is small, the shielding power should be adjustable. Then which frequency bands need to be shielded, and which are all shielded? Or do you only need to block some frequency bands?
At this time, we should remind everyone that the best effect can be through the purchase of a suitable shield, but also through the use of technology. The most important ones are as follows:
1. It is recommended that the indoor protective cover be placed at a height of about 4500px-5500px from the ground, and it is best to lean forward at an angle.
2. Whether there are obstacles (such as walls, metal products, human bodies, etc.). ) Between the protective cover and the wireless communication device (mobile phone, etc.). ). The interference signal from the shield will attenuate to different degrees after passing through the obstacle, 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 shielding application environment is from the base station, the stronger the theoretical shielding effect of shielding.
The above is the information about the selection guide and use items of the school mobile phone signal screener, I hope it will be helpful to everyone. Greatjammer has been focusing on the research and development of mobile phone signal shielding and signal jammer for more than 10 years!