dome camera ptz camera geovision dvr DOME CAMERA Auto Direct PTZ dome camera to the Preset Location On Alarms. Use one PTZ dome camera to cover a large open area. For example, if a card reader at the front door is activated, that signal will direct PTZ dome to turn at the direction of the doorway area. If a contact sensor is triggered at the window, then the PTZ dome camera will turn its direction to the window area.