In the examination, using signal jammer to supervise students' examination is a more effective method. However, the jamming effect of Signal Jammer often depends on whether electronic products can receive and release signals. How to test the effect of Signal Jammer?

1. When testing the interference distance of Signal Jammer, do not only use the network test of a certain business provider, but try it several times as much as possible. During the exam, cheating candidates use different mobile networks. At present, there are many 4G mobile networks. If the power of the signal jammer is not enough, it may not interfere with the network at all.

2. Every kind of mobile phone network may be completely interfered. The startup time needs to wait for a while. When the network cannot appear, sometimes there is no interference.

3. When the Signal Jammer works, it needs to keep heating up. After a period of time, the temperature changes significantly, indicating that the effect is obvious.

We need to test the effect of Signal Jammer according to the above methods. Whether it can interfere with various signals requires repeated use of a variety of network tests.