Considerations for Purchasing Exam Room Signal Jammers

Ensuring Effective Signal Jamming for Exam Integrity

As the year approaches its end, many schools are preparing for their final exams by installing signal jammers in exam rooms. These devices are designed to prevent students from using electronic devices for cheating purposes. However, there are several factors to consider when purchasing these exam room signal jammers to ensure their effectiveness. This article will discuss important considerations such as proximity to base stations, signal coverage, and power output.

Proximity to Base Stations

One crucial factor to consider when purchasing an exam room signal jammer is the distance between the exam location and nearby base stations. Customers often inquire about the effectiveness of these devices, and it is important to note that different models of signal jammers have varying power levels. Generally, these devices can block 2G, 3G, and 4G signals. However, some models may not be able to block 5G signals. Manufacturers determine whether to install modules that can block 5G signals based on the presence of nearby 5G signals. Therefore, it is essential to assess the proximity to base stations and the need for 5G signal blocking capabilities before making a purchase.

Signal Coverage and Frequency Bands

Another important consideration is whether the exam room signal jammer can provide comprehensive coverage across different frequency bands. The effectiveness of blocking signals in frequency bands such as DCS1800, FDD1900, CDMA800, and GSM900 should be evaluated. Additionally, the range of signal coverage should be determined. If there are no nearby 5G signals, the installation of a 5G module can be avoided, resulting in cost savings. It is crucial to confirm these details to ensure the signal jammer meets the specific requirements of the exam room.

Selective Frequency Band Modification

In some cases, there may be a need to selectively modify the frequency bands of the exam room signal jammer to only block Wi-Fi and phone calls. Depending on the specific requirements, the frequency bands of the signal jammer can be adjusted accordingly. This flexibility allows for customization based on the desired level of signal blocking.

Testing Power Output and Voltage

Upon receiving the exam room signal jammer, it is important to test its actual power output and voltage. The selection of the appropriate power level for the signal jammer should be based on the specific environmental conditions. By considering factors such as the size of the exam room and the number of electronic devices present, the optimal power output can be determined.


When purchasing an exam room signal jammer, it is crucial to consider various factors to ensure its effectiveness. Proximity to base stations, signal coverage across different frequency bands, and the need for selective frequency band modification should all be taken into account. Additionally, testing the power output and voltage of the signal jammer is essential for optimal performance. By carefully considering these factors, schools can maintain the integrity of their exams and prevent cheating through the use of electronic devices.