Understanding Signal Jammers and Their Installation in Examination Halls

An Insight into Signal Jammers and Their Proper Installation in Examination Halls

Signal jammers, also known as signal blockers or disruptors, are wireless devices designed to block or interfere with signals. They are commonly used in various environments, such as examination halls, to prevent unauthorized communication. This article aims to provide a comprehensive understanding of signal jammers and their proper installation in examination halls.

I. What are Signal Jammers?

Signal jammers, as the name suggests, are devices that block or disrupt signals. They are also referred to as interference devices, blockers, shields, disruptors, or screeners, depending on the region. Signal jammers come in various types, including examination hall signal jammers, drone disruptors, high-power blockers, and examination hall signal disruptors. These Signal Jammers differ in terms of usage environment, power, and type.

Examination hall signal jammers specifically target wideband transmitters operating within the frequency ranges of 862-892MHz, 925-967MHz, 1805-1887MHz, 1877-1927MHz, 2005-2032MHz, 2107-2177MHz, 2300-2500MHz, 2512-2682MHz, and others. They are wireless devices used to intercept signals between base stations and mobile phones, ensuring a controlled testing environment.

II. Proper Installation of Examination Hall Signal Jammers

To ensure the effective functioning of signal jammers, it is crucial to install them properly. Since different signals exist in any given environment, each with varying strengths, understanding the signal intensity on-site allows for targeted installation of signal jammers.

In the absence of surveying equipment, institutions should gather information about the surrounding base stations at the installation site. Based on the survey results, signal jammers can be strategically paired with different signals to achieve the most optimal state. It is essential to consider the interference level in non-shielded areas and the impact on neighboring base stations.

Examination hall signal jammers should be placed in well-ventilated indoor areas. The internal antennas should be positioned to avoid obstruction by large objects and ensure proper airflow. For larger indoor spaces, a cellular-style installation method can be considered. When not in use, the power supply should be promptly disconnected to maintain the shielding effect and ensure long-term stable operation.


Signal jammers play a vital role in maintaining the integrity of examination halls by blocking unauthorized communication. Understanding the concept of signal jammers and their proper installation is crucial for creating a controlled testing environment. By following the guidelines mentioned above, institutions can effectively utilize signal jammers to prevent signal interference and ensure fair and secure examinations.