DMTA-10084-01EN, Rev. 2, November 2018
Software Features and Options
177
Figure 11-21 DGS/AVG curves on the screen
11.4.2
Curve-Adjustment Options
After a DGS/AVG curve has been calculated on the EPOCH 6LT, you can make
adjustments to that curve during an inspection. These adjustments include gain
adjustments allowing proper defect scanning and code-compliant defect sizing, as
well as reference-reflector adjustments.
11.4.3
Transfer Correction
Transfer correction is an adjustment in the reference gain setting during calibration of
the instrument. It is typically added when the surface conditions of a calibration block
and test piece are different. The coupling conditions on the test surface can often
cause signal loss after calibrating a DGS/AVG curve, which results in inaccurate
comparisons of the test reflectors with the calibrated DGS/AVG curve. The EPOCH
6LT allows you to adjust for this difference by adding transfer correction to the
calibrated base gain after completing the DGS/AVG curve setup.
Summary of Contents for EPOCH 6LT
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