Follow the process in our Quick Start Guide After setting up the unit and connecting to it in the Diamond App, tap on the PRO 3.0 icon in the bottom right corner of the Play screen Tap on the “Recalibrate” button The lights on top of the unit will turn white and Diamond App will display calibration streams of all 3 cameras Set up the calibration board flush with the front edge of home plate. Also make sure the board is level by using the bubble level on top of the board. Make sure the red azimuth line for the Mono camera is in line with the middle of the rubber. Then make sure both red azimuth lines on the Stereo cameras are landing on the calibration board. Note: if the line on the Mono camera is in line with the middle of the rubber, but the two Stereo lines are not on the board, make sure the unit is directly in line between home plate and the mound Once all 3 cameras are lined up, tap the “Field Calibration” button in the bottom right corner You should get a “Calibration Successful” message, after which tap the “Done” button that will populate in the bottom right corner to save the calibration. Note: If the calibration is not successful, follow the instructions from the popup message at the bottom of the screen and attempt this step again. Again, make sure the unit is set up correctly and that the calibration board is level.