The construction company set up the base station in an open environment, its position was correctly measured, and the signal from all visible satellites was tracked at a good signal ratio level. Why is there still a problem?

Problems can and do occur on construction sites for large construction projects. A group of excavators, bulldozers, pile drivers and graders work in a confined area, their movements coordinated by a GPS guidance system.

The foreman knew the location of each vehicle, accurate to the meter. Without warning, GPS fix is ​​lost, warning messages appear on the screen of the operator guidance unit, and the worksite machine stops, causing the machine to be down for days or weeks and causing damage.

The construction site is near a boulevard frequented by busy commercial vehicles, whose movements are often monitored by tracking devices including GPS receivers. For example, such devices ensure drivers do not exceed legal driving hours or avoid tolls.

In recent years, more and more drivers have turned to inexpensive GPS jammer device to move around undetected or to block built-in anti-theft systems.

It is understandable to hope to purchase a home cell phone signal jammer to interfere or cut off the mobile phone signal, thereby preventing children from surfing the Internet, but there are some points to pay attention to when using a mobile phone signal jammer.

The first is the power of the shield, which directly affects the shielding distance of the shield. It is suitable to shield the signal in the child's room without affecting the surrounding neighbors. If it interferes with the signal of the neighbor, it will be troublesome.

The second is the interference signal, because it is to prevent children from playing mobile phones at home, it is necessary to be able to block WiFi signals and mobile network signals at the same time, which can effectively prevent children from connecting to WiFi or using mobile phone traffic to surf the Internet. I won't be interested in playing anymore.