How to analyze the source of the lost signal of the mobile phone signal jammer?

When installing and setting up a cell phone signal jammer, it is critical to determine whether all nearby cell phone signals are effectively blocked. Engineers need to address and analyze these issues during the construction phase. When signal gaps occur, some cell phone signals are not completely blocked despite the interference of the jammer, and it becomes very important to understand and identify the source of these lost signals.

Professional technicians from cell phone signal jammer manufacturers usually carry portable spectrum analyzers when they are on site. These analyzers help technicians preliminarily identify the specific frequency bands where the lost signals occur. However, when the signal strength of the base station is only slightly stronger than that of the jammer, it becomes difficult to distinguish the frequency band waveforms and determine the lost signal.

Fortunately, there is a simple and practical method to identify the frequency band that causes the lost signal on site. The problematic frequency band can be easily discovered by downloading a special mobile phone application called “Cellular-Z” on the tested mobile phone. To use this method, install and open the “Cellular-Z” software on the mobile phone and activate the mobile phone signal jammer. Then, take the mobile phone to a predetermined test point at a certain distance from the jammer and carefully observe the display interface of the software. Pay special attention to the column marked “NR-FREQ”. If a specific frequency value is displayed, it indicates the corresponding missing mobile phone band. On the other hand, if this position is empty, it means that the test frequency is completely blocked by a jammer at this moment.

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