There are still several ways to test the effect of the mobile phone signal jammer in the examination room. Among them, the simplest and most effective method is to directly test the power, shielding range and other data of the signal jammer in the examination room through the spectrum analyzer. If you don't have professional electronic equipment, you can also use multiple, multiple frequency bands and different types of mobile phones, walkie-talkies and other communication equipment to conduct field tests on the cell phone blocker in the examination room. It may be a method.

During the test, you can prepare mobile phones of various brands and use different operators. After the power is turned on, hold the mobile phone from the position of the signal jammer in the examination room from near to far to detect the effective radius of the jammer. The distance between the mobile phone and the mobile phone signal jammer in the examination room is getting farther and farther. At intervals, it is necessary to check whether the mobile phone has displayed signal numbers, sent messages, and made calls. When checking whether the mobile phone is blocked, it is necessary to make a call, because the signal display on the mobile phone may appear false and not very accurate when the test room signal jammer is just turned on, so you can try to make a call. If it is within the interference range, otherwise it means it has exceeded the shielding range. During the test, it is recommended to detect the shielding distance of the mobile phone signal jammer in multiple directions at the same time, and test whether a certain point is within the working range of the signal jammer in the test room, because the mobile phone is in this position for more than 1 minute before testing.

Compared with professional equipment, although the test results through mobile phones have certain limitations, they are relatively easy to understand.