An actuator

In satellite installation, an actuator is a device used to move the satellite dish to adjust its position and orientation, usually to track the satellite signal. The actuator is typically a motorized arm that rotates the dish horizontally and vertically, allowing it to point towards the desired satellite. The actuator is controlled by a receiver or controller, which sends signals to the actuator to move the dish to the correct position. The actuator is an essential component of a satellite installation system, as it enables the dish to receive the signals needed to provide satellite television, internet, or other services.