EOTech CNVD-T (SU-232/PAS) Clip-On Night Vision Device - Thermal - Manual (Page 27)

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If the LEFT / RIGHT buttons are not pressed within 3
seconds, the contrast scale will disappear and the CNVD-T
will revert to normal viewing mode. Once adjusted, the
contrast will remain at the applied setting (even if the CNVD-
T is turned off) until readjusted by the operator.
2.9.1 Auto-Gain Control . The CNVD-T may also be placed
in one of two auto-gain modes:
a. AUTO-LOW mode is accessed by repeatedly
pressing the RIGHT button to move the status bar
along the contrast scale. As the status bar
approaches the extreme right (HIGH) end of the
scale, the word MANUAL will be replaced by the
word AUTO-LOW.
b. While in AUTO-LOW mode, pressing the RIGHT
button once more will place the CNVD-T in AUTO-
HIGH mode. The word AUTO-LOW will be replaced
by the word AUTO-HIGH.
NOTE
Adjusting the contrast in MANUAL mode allows for
lower and higher settings than either of the AUTO
modes.
2.10 FOCUS ADJUSTMENT
The objective lens must be focused for the viewing distance
being observed. Rotate the objective focus ring for best
image clarity. A change in viewing distance requires that the
lens be refocused. However, if already focused for a
distance of at least 20m, no change in focus is required
between this distance and infinity.