User Manual

Initial customer manufacturing calibration UM2039
8/26 DocID029105 Rev 1
Figure 3. Cover window impact on ranging
The cross-talk correction is basically a weighted gain applied to the ranging data, based on
a calibration result.
Correcting low cross-talk is easier than correcting high cross-talk.
2.6.2 Cross-talk calibration distance
The calibration distance is dependent on the quality of the cover window. Low cross-talk or
high cross-talk calibration cannot be performed at the same distance.
The starting point of the valid distance to perform cross-talk calibration is when the actual
signal starts to deviate from the ideal curve.
If the cross-talk calibration is performed in the linear area of the ranging curve, the
correction factor will be too low, and the correction will have almost no effect.
The valid distance ends when the signal is starting to be too low (ranging distance starting to
decrease).
Figure 4: Cross-talk calibration valid distances gives an example of exclusion areas where
the cross-talk correction should not be performed.
In this figure, the valid distance for cross-talk calibration is from point A to point B.