Under the interference of the full-band signal jammer, why does the mobile phone still have a signal display?

The use of full-band signal jammers in school exams has become a trend, but there are many issues to consider before using them. For example, when the jammer is activated, the mobile phone will display a signal, why is this?

First of all, we need to understand the working principle of the full-band signal jammer, which can send out radio signals and conflict with the signals between mobile communication devices, resulting in the device not working properly. When the jammer is activated, the mobile phone will display a signal, there may be the following reasons:

1. The interference meter fails to achieve effective interference effect or the interference range is insufficient

When the signal is displayed on the screen of the mobile phone and a call is made, the mobile phone can be used normally and the call quality is relatively good, which means that the cell phone jammer may not achieve an effective interference effect or the interference range is not large enough. In addition, if your mobile phone is close to the jammer but there is no signal, it means that the jammer used is not enough to meet the interference requirements on site, and more high-power signal jammers need to be installed.

2. The interference effect is in a critical state, and the interference range is unstable

Sometimes, the mobile phone shows that there is a signal, but the call quality is very poor, which means that the interference effect of the full-band signal jammer on the mobile phone is in a critical state, and there is a certain interference effect, but the interference range is unstable. This situation may be caused by the unstable signal strength from the base station signal to the site of use or some mobile phones with strong anti-interference ability.

3. False Signals

When the mobile phone shows that there is a signal, but in fact it cannot make a normal call or even access the Internet, it may be caused by a false signal. At this time, when making a call, the mobile phone will display no signal or limited service. At this time, it can be judged that the signal displayed on the mobile phone is a false signal, but the actual mobile phone is blocked. At this time, the mobile phone cannot be used normally with the outside world.

It should be noted that the interference range of the full-band signal jammer is related to the strength of the mobile phone signal at the location of the user. If the mobile phone signal at the location of the user is strong, the interference distance of the device will be shortened; if the mobile phone signal is weak, the interference range of the jammer will be expanded.

In short, before using the full-band signal jammer, it is necessary to comprehensively consider the conditions of the site and equipment used to determine the best use plan to ensure that the interference effect achieves the expected effect. At the same time, the interference of mobile phones also needs to be carefully considered to avoid affecting normal communication services and causing certain social impacts.