910-269-EN, Rev. B, June 2011
206 Chapter 11
Figure 11-9 A small range DAC
11.2.4 Gain Adjustment Options
The EPOCH 1000 Series DAC/TVG software features three separate types of gain
adjustment for each DAC/TVG setup. These gain adjustments allow for better
inspection precision, easy manipulation of curves and live peak information, and
transfer correction.
11.2.4.1 Scanning Gain
In order to quickly find and identify potential defects, it is commonly required by
code to increase the gain (scanning gain) on the EPOCH
1000 Series from the
reference (calibration) gain for scanning purposes. However, once a potential defect is
identified, this gain is usually removed to view the reflector at Ref gain level, set at
calibration. The DAC/TVG software for the EPOCH
1000 Series is fully capable of
adding temporary scanning gain for inspection purposes. This scanning gain only
affects the live A-scan and does not adjust the level of the DAC curve(s) set up on
screen.
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