Nowadays, people cannot do without mobile phones. People always put their hands on their phones all day long, but some places will block the phone signal. Next, greatjammer will tell you what the cell phone jammer is for and how to use it?
Telephone signal jammers are mainly used in places where the use of mobile phones is prohibited, such as examination rooms, schools, gas stations, churches, courts, libraries, conference centers (rooms), theaters, hospitals, government, finance, prisons, public security, military places, etc. It is understood that the mobile phone signal jammer on the market can limit the distance of the mobile phone signal from the transmitter to 500M. The shielding radius is adjustable, covering more than 30 square meters. The mobile phone signal shielding device can only shield the mobile phone signal and does not affect other electronic equipment. Save electric energy, power 12W-480W. The screening machine scans from the low-end frequency of the forward channel to the high-end frequency at a certain speed during operation. This scanning speed will cause garbled interference in the message signal received by the mobile phone, and the mobile phone cannot detect the normal data sent by the base station, resulting in the mobile phone being unable to establish a connection with the base station. Mobile phones are characterized by searching the Internet, no signal, and no service system.
The so-called shielding efficiency refers to whether there are blind spots or missing spots in the shielding effect. In some prisons, there may be transmitter base stations with strong cell phone signals. In order to achieve a good shielding effect, a lot of materials and energy will be consumed, and the cost will correspondingly increase substantially. Therefore, the better the shielding effect, the higher the cost. In practical applications, the shielding requirements are generally high, with slight leakage and blind spots. Violators may seize this loophole and allow the mobile phone to be used in the originally designated shielding area. The original intention of shielding the mobile phone cannot be realized.
If the initial failure-free operation time is 1 year, in less than 6 years of practical applications, failures will often occur. Although this is a free guarantee, the risks involved are immeasurable, and personnel resources will be wasted. There will be corresponding big discounts on the price/performance ratio.
Regardless of external interference, as long as the screen function is added, a simple screen is easier. However, in order to ensure that the shielding area has no pass-through areas and leakage points, the shielding area has a higher power, and when the leakage is small, the external interference is greater. This requires careful consideration of screen design and technical control in order to obtain an accurate and efficient screen without external interference.