After calibrating a fixture, Residuals for each measurement point will be calculated and displayed in the Fixture Calibration Points widget.

Calibration errors are differences between the calculated pan/tilt values of a fixture and the estimated pan/tilt values of the fixture, based on all measurement points used in the calibration. A calibration residual range between 0-0.08 indicates that a given measurement point is accurate relative to the overall fixture calibration. A collection of high quality samples is necessary for accurate fixture calibration. In this case, the smaller the number, the better.

A measurement point with a large residual value indicates that it was collected poorly relative to the other points. Poor quality measurement points should not be used in calibration; they should be removed and the fixture re-calibrated.

Fixture Calibration Points widget

To disregard measurement points for a fixture

1. In the Fixtures widget, select the fixture that has measurement points you want to stop using for calibration.
2. In the Fixture Calibration Points widget, clear the Use checkbox for any measurement points you will not use.
   • Result: The selected measurement points will not be used for the fixture’s calibrated position next time you hit calibrate selection.

Note: If after removing measurement points from a fixture you have less than 5 remaining, you need to collect more sample measurement points before you recalculate fixture calibration.

To delete measurement points from a fixture

1. In the Fixtures widget, select the fixture you want to delete measurement points from.
2. In the Fixture Calibration Points widget, select any measurement points you want to delete.
3. Click Delete Point(s).
   • Result: The selected measurement points are deleted from the fixture.