910-269-EN, Rev. B, June 2011
Calibrating the EPOCH 1000 Series (Phased Array Mode) 289
Figure 17-11 The completed gain calibration
The gated region must capture the side-drilled hole indication for all focal laws. If
the side-drilled hole indication is out of the gated region for any focal law during
calibration, the instrument does not properly calculate sensitivity (gain) for
that/those focal laws.
Sensitivity (gain) calibration can be performed before wedge delay calibration, if
desired. In some cases, normalizing the amplitude response of a given reflector
allows a more precise thickness measurement during wedge delay calibration.
However, velocity calibration must always be the first calibration step.
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