Is the power adjustment of the mobile phone jammer in the examination room an overall adjustment or a frequency band adjustment?
Most of the common mobile phone jammers in the examination room on the market do not have power adjustment functions, such as those used for signal shielding in the examination room or for signal shielding in the conference hall, but there are still some customers who want to shield the device With power adjustment function. The purpose of doing this is to not want the shielding signal range to be too large, thereby affecting or interfering with other irrelevant areas. Then, for the mobile phone jammer with power adjustment, does it adjust the transmission power as a whole or by frequency bands? ?
Looking at this problem from the perspective of customers and users, the customers certainly hope that the power adjustment operation of the mobile phone jammer in the examination room can be achieved simply, conveniently and quickly. For example, the adjustment of the output power can be realized through a physical power adjustment knob. However, the very regrettable result is that such expectations are actually difficult to achieve. Trying to achieve overall power adjustment with a simple knob basically doesn't work.
Why is there such a conclusion? That's because the mobile phone jammer in the examination room is aimed at signals of various frequency bands and standards, and is composed of at least ten shielding modules according to the division of frequency bands. Each shielding module only interferes with the signal of the current frequency band. Let's take mobile phone signals as an example. Different frequency bands and different standards of mobile phone signals, even in the same location, actually have different signal strengths from the base station they receive. The result of this difference is that when the mobile phone jammers in the examination room target different frequency bands and different standards of mobile phone signals, the effective shielding distance is also different, and sometimes the difference is very large. It is obviously inappropriate to use only one adjustable potentiometer to adjust the overall power of the mobile phone jammer in the examination room. The correct way must be to adjust separately for different frequency bands. This is why we can see that all mobile phone jammers with power adjustment function have a large number of power adjustment knobs, and the number of these adjustment knobs corresponds to the shielding module one by one.
To sum up: the power adjustment of the mobile phone jammer in the examination room can relatively accurately control the effective shielding range. However, if the user only relies on the power adjustment knob to adjust, it can only achieve a general adjustment. For more accurate range control, we suggest that the manufacturer of the mobile phone jammer in the examination room carry a professional wireless signal spectrum analyzer. While adjusting the power, use the display and analysis power of the spectrum analyzer to achieve the final ideal effect.
