Controls and Indicators-Continued
Controls and Indicators
Rotates clockwise and counter-
Eyepiece focus ring
clockwise for best eye focus
on CRT display.
Provides reference points for
positioning eyepiece focus-
ing after best initial focus
has been determined.
2-2. Operating Instructions
If a malfunction occurs that causes
the CRT display raster to collapse into
a single horizontal or vertical line or
an illuminated spot on the CRT screen,
turn CONTRAST and BRIGHTNESS
controls (fig. 2-1) fully counterclock-
wise to avoid burning a line or spot
on the face of the CRT.
Do not attempt to operate the viewer
while looking through glass (such as
vehicle windshield or windows). Glass
will attenuate the IR signal rendering
the viewer ineffective.