910-269-EN, Rev. B, June 2011
198 Chapter 11
11.2.1 Feature Activation and Reference Correct
Prior to the activation of any options associated with DAC/TVG, the instrument must
be properly calibrated to the material being inspected. DAC/TVG can be activated in
the DAC/TVG setup page accessible by choosing 4/5
> Sizing Option > DAC/TVG
(see
Figure 11-2 on page 198).
Figure 11-2 The DAC/TVG setup page
You may also choose to apply a feature known as Ref Correct (reference correction) to
the digital analysis of the live A-scan and DAC/TVG option. The reference correction
feature, when activated, allows full gain manipulation of either the live echo peaks or
the DAC curve while providing the % amplitude or dB comparison of the actual peak-
to-curve ratio. In this way, you can use scanning gain, while maintaining an accurate
measurement reading of the ratio of the gated peak to the DAC curve for sizing
purposes. The gated echo amplitude is corrected back to the reference gain level for
amplitude evaluation compared to the DAC curve.
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