See also underscanning. A device that can be remotely controlled to provide both vertical and horizontal movement for a camera, with zoom. The measurement of a video signal from the base of the sync pulse to the top of the white level. For a full video signal this should be one volt. A function contained within a telemetry system that, on receipt of a signal, causes a particular camera to pan, tilt and zoom to a predetermined field of view.
Most systems can accommodate up to sixteen preset positions for each camera.
This is an especially useful feature on larger systems with alarmed areas. Back to top. Display where 4 cameras are viewed on the same screen, each camera image occupying a quarter of the display area. The splits do not always have to be equal and other configurations can be possible. A video switcher which is connected to the camera cables and which contains the switching electronics.