Is the power adjustment of mobile phone jammers in the examination room an overall adjustment or a frequency band adjustment?

Cell phone signal jammers commonly used in exam rooms or conference rooms often lack power adjustment functions. But some customers specifically require jammers to have power adjustment functions to avoid excessive signal interference in irrelevant areas. So the question is: Does the cell phone signal jammer with power adjustment function adjust the overall transmission power or adjust the transmission power of each frequency band?

From the perspective of customers and users, it is natural to hope that the power adjustment of the cell phone jammer in the exam room is simple, convenient and fast. Ideally, they envision being able to use a physical knob to adjust the power output. Unfortunately, it is challenging to meet these expectations. Trying to adjust the overall power with a simple knob is usually not feasible.

Why do we come to this conclusion?

This is because the cell phone signal jammers used in exam rooms target signals of different frequency bands and standards and consist of several shielding modules designed for specific frequency bands. Each module only interferes with signals within its specified frequency range. Let’s take cellular signals as an example. Cell phone signals of different frequency bands and standards receive different signal strengths from base stations even in the same location. When the exam room jammer targets different frequency bands and standards, this difference results in different effective shielding distances. Sometimes, this difference can be large.

It is not appropriate to use a single adjustable potentiometer to control the total power of the exam jammer. The correct approach is to adjust the power of each frequency band separately. This is why mobile phone jammers with power adjustment function have multiple power adjustment knobs, each corresponding to a specific shielding module. Best-selling WIFI jammers and GPS jammers in Europe and America.

In short, the power adjustment of the exam jammer can effectively control the required shielding range. But relying solely on the power adjustment knob for precise range control may only make general adjustments. For more precise control, we recommend that the exam jammer manufacturer use a professional wireless signal spectrum analyzer. By adjusting the power while monitoring the spectrum analyzer display and analyzing the signal, the desired effect can be achieved more effectively.

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