I want to buy a jammer, what do I need to pay attention to?

I need to buy a signal jammer for our school to prevent students from cheating on their phones in the exam room, but what kind of jammer should I buy?

Topsignaljammer  2022.3

1. First of all, you have to make sure if there is a signal base station near your school? Because if there is a signal base station within 200 meters of the school, the signal jammer will not work.

2. Distinguish frequencies. The operating frequency of the shield is: 869~894MHz; 825~960MHz; 1805~1880MHz, 1900~1990MHz, etc. The working frequency band is CDMA800, GSM900, DCS1800, PCS1900.

3. Select the signal to be blocked: for example, whether you want to block 2/3/4G or 5G, wifi or GPS, etc.

4. Select the power size according to the environment. This is the easiest place to fake, and it is also the place where manufacturers often fake. Because, to measure the actual power level, a professional spectrum analyzer must be used. It is impossible for ordinary customers to have such equipment. Therefore, it all depends on the professionalism of the customer to choose the equipment. Power size: shielding devices can generally be divided into low power, medium power, and high power, and the power is between 3W-100W.