ATN 3 c. Flashing, Flickering, or Intermittent Operation, d. Cosmetic Blemishes, Bright Spots

c. Flashing, Flickering, or Intermittent Operation

The image may appear to flicker or flash. If there is more than one flicker, check for loose battery adapter or weak battery. Return the ATN NVM-14 to the maintainer.

d. Cosmetic Blemishes

These are usually the result of manufacturing imperfections that do not affect image intensifier reliability and are not normally a cause for rejecting ATN NVM-14. However, some types of blemishes can get worse over time and interfere with the ability to perform the mission. If you believe a blemish is a cause for rejection, record the specific nature of the problem on the main- tenance forms and identify the position of the blemish by using the clock method and approximate distance from the center (e.g., 5:00 toward the outside, 2:30 near the center, or 1:00 midway).

The following are cosmetic blemishes:

1. Bright Spots.

A bright spot is a small, non-uniform, bright area that may flicker or appear constant (Figure 5-3).

Not all bright spots make the ATN NVM-14 rejectable. Cup your hand over the lens to block out all light. If the bright spot remains, return the ATN NVM-14 to the maintainer. Bright spots usually go away when the light is blocked out. Make sure any bright spot is not simply a bright area in the scene you are view- ing. Bright spots are acceptable if they do not interfere with the ability to view the outside scene and the ability to per- form the mission.

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