Many users feel that the shielding device is ineffective. In fact, the shielding radius is very small. In fact, many of them are caused by the wrong method of use. So how to detect the shielding range of the mobile phone signal jammer?

Prepare mobile phones with multiple frequency bands, such as: China Mobile, China Unicom, PHS, 3G (three 3G systems are recommended: Mobile TD-SCDMA, China Unicom CDMA2000, Telecom WCDMA), then turn on the cell phone jammer, hold the mobile phone, and connect to the mobile phone from the mobile phone. The installation position of the signal jammer is from near to far to detect the effective shielding radius of the jammer. During the test, the user should take the jammer as the origin and test the shielding distance in multiple directions.

When checking whether the mobile phone is blocked, you can't just look at the number of signal bars on the mobile phone. This is because the number of signal bars on the mobile phone does not represent the current communication situation of the mobile phone. At this time, it is not too early to draw conclusions. device has no effect. Instead, you can dial the phone intermittently. You can dial the phone. If you can't get through, it means that it is still within the shielding range. If it is connected, it means that it has exceeded the shielding range.

After testing multiple frequency bands, select the distance with the shortest shielding radius of a certain frequency band as the effective shielding radius of the mobile phone signal jammer in this area. The location can be predicted based on this when a large-area honeycomb is deployed.

The above is a very effective and simple method. When testing the radius of the shield in the current environment, it is not too early to conclude that the shielding effect of the shield is only so far. It is also necessary to check whether there is a base station nearby, because environmental factors affect the shielding effect. It has a great influence. If the shield can meet the range required by the examination room, then you can use it with confidence.