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4. Set your eye relief by depressing the socket-release button and
move the PVS-7 back toward your eyes until the eyecups comfort-
ably seal around your eyes.
5. Turn the RESET/OFF-ON-IR/PULL switch ON.
6. Adjust the interpupillary distance (Figure 2-1) by sliding the eye-
pieces together or apart so each eye can observe the entire field of
view at the same time. The eyepieces adjust independently.
7. Readjust the vertical strap assembly (see Figure 2-4) for vertical
adjustment of the head mount until the PVS-7 is properly aligned
with your eyes.
NOTE
The sharpest image will be observed only when the objective lens
and both eyepieces are properly focused. The objective lens fo-
cus adjustment is used to focus on objects at varying distances.
The diopter adjustment rings are used to focus your eyes (without
glasses) on the image intensifier screen. These adjustments oper-
ate independently and must be made separately.
8. Fold the right eyecup over the eyepiece with your right thumb or
forefinger to obstruct the view through the right eyepiece. Rotate
the left diopter adjustment ring for the clearest view of the image
intensifier screen.
9. Fold the left eyecup over the eyepiece with your left thumb or
forefinger to obstruct the view through the left eyepiece. Rotate the
right diopter adjustment ring for the clearest view on the image in-
tensifier screen.
10. Adjust the eye relief distance by pressing the socket release
button (See Figure 2-4) and sliding the PVS-7 fore or aft to obtain
a full field of view of the image. Readjust the diopter rings for best
image.
NOTE
Any readjustment of eye relief requires readjustment of the diopter
rings.
11. Adjust the objective lens focus (Figure 2-1) while observing an
object until the sharpest image is obtained.
2-23
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