System Configurations 53PTZ controlFigure 4-47Table 4-8 PTZ control parameter descriptionParameter DescriptionStep typeIt consists of fixed step and variable step.By selecting Fixed, the step remains unchanged when PTZ turns; itis always the set step value.By selecting Variable, the step changes with the tilt of joystick. Thelarger tilt angle represents quicker turning speed.8 direction keys Control turning direction of SD lens.Zoom Set the zoom increase/decrease of PTZ lens.Focus Set the focus increase/decrease of PTZ lens.Iris Set the iris increase/decrease of PTZ lens.Call Call the preset point, scan, tour and pattern.Settings PTZ operation settings, including the preset point, scan, tour and pattern.SD menu Open and close SD menu.AUX Fn Lighting and wiper function.Exit Exit PTZ control.Use the joystick to control 8 directions of PTZ.4.5.1 CallClick Call. The Call interface is displayed. See Figure 4-48.