REMOTE POSITIONING DEVICES
There are two main types of remote positioning device, those that move only in a horizontal plane and those that can mm9ove in two planes. Movement in a horizontal plane is known as panning or scanning. Movement in the vertical plane is known as tilting. The device that provides movement in both planes is called a pan, tilt unit or pan, tilt drive.
Both scanners and pan, tilt units are made for indoor and outdoor use. The construction is fundamentally the same except that those units for external use are designed for the appropriate IP rating. Pan, tilt units are also produced for the range of hazardous environments.
