DMTA-10084-01EN, Rev. 2, November 2018
Software Features and Options
165
11.3.5.1 Scanning Gain
To quickly find and identify potential defects, it is commonly required by code to
increase the gain (scanning gain) on the EPOCH 6LT from the reference (calibration)
gain for scanning purposes. However, after a potential defect is identified, this gain is
usually removed to view the reflector at Ref gain level, set at calibration. The
DAC/TCG mode 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.
To add temporary scanning gain
1. Open the gain adjustment shortcut menu (see “Gain adjustment shortcut menu”
on page 31 for instructions on opening and using the shortcut).
2. Adjust the gain in either coarse or fine increments, or use the +6 dB or –6 dB
buttons to increase or decrease the scanning gain (see Figure 11-11 on page 165).
Figure 11-11 Standard DAC with 6 dB scanning gain
3. Use the Scan dB button to toggle between the base (reference) gain and the
adjusted scanning gain.
For example, select the +6 dB button, and then highlight Scan dB and press the
Enter key to toggle between +6.0 dB and +0.0 dB.
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