DMTA-10040-01EN, Rev. E, February 2018
Chapter 5244
9. Adjust HMIXGN (horizontal MIX gain, C key) and VMIXGN (vertical MIX
gain, D key) until the signal extends across approximately 6 major divisions on
the grid (see Figure 5-173 on page 244).
Combined horizontal and vertical gain adjustment is not available while using the
MIX menu. Adjustments to horizontal and vertical gain must be made separately and
equally.
Figure 5‑173 The thru‑wall hole signal after AUTO MIX gain adjustment
10. Press the FREEZE key ( ) to enable signal acquisition.
11. Place the probe in a defect-free area near the tube’s support ring, and then press
the NULL foot switch.
12. Scan the tube for defects (see Figure 5-174 on page 245).
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