Common Problems in Installing Exam Signal Jammers in Standardized Exam Rooms

In recent years, many universities have been constructing standardized exam rooms for English proficiency tests such as the CET-4 and CET-6. One essential equipment in these standardized exam rooms is the exam signal jammer. However, during the installation process, there are several common problems that project contractors often encounter. This article will discuss these issues and provide recommendations for a successful installation.

Choosing the Installation Position:

When installing an exam signal jammer in university classrooms, the first consideration is the selection of the installation position. The most common positions are on both sides of the blackboard at the front or back of the classroom. However, it is crucial to pay attention to the antenna area of the jammer. It should not be placed too close to audio or video cables, as this may cause unnecessary signal interference.

Installation Height:

The installation height of the exam signal jammer is another important factor to consider. It is recommended to install the jammer at a height between 1.8 meters and 2.5 meters. If the installation is too low, it can be easily tampered with. On the other hand, if it is installed too high, it may result in incomplete coverage and suboptimal jamming effects.

Impact of Nearby Mobile Base Stations:

There are two situations in universities that can significantly affect the effectiveness of exam signal jammers in standardized exam rooms. Firstly, in recent years, many mobile network operators have directly installed their base stations on campus, often on the rooftops of teaching buildings or other office buildings. The closer the base station is to the exam signal jammer, the more it will affect the jamming distance.

Hidden Indoor Signal Amplifiers:

The second situation involves the installation of indoor signal amplifiers by network operators in the corridors of teaching buildings. These amplifiers are often concealed, such as being installed in the ceiling of the corridor. These amplifiers can interfere with the jamming effect of the exam signal jammer if they are in close proximity.


Installing an exam signal jammer in standardized exam rooms requires careful consideration of the installation position and height. It is essential to avoid interference from audio and video cables and ensure the jammer is installed at an appropriate height. Additionally, the presence of nearby mobile base stations and hidden indoor signal amplifiers can significantly impact the effectiveness of the jammer. By addressing these common problems, universities can ensure a successful installation and maintain the integrity of standardized exams.