Vivotek PD8136 User Manual page 82

VIVOTEK
PTZ > Calibrate
This function re-calibrates the home position to the default center to recover any displacement caused by
external forces. Please note that there is no confirm message after using the function, and the calibration
immediately takes place. If, after a long use, a user finds it is difficult to move camera's field of view to a
specific point, use this function to restore the camera's orginal coordinates in pan and tilt motions.
82 - User's Manual