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NVS 6
MANUAL
Page 39
Procedure Inspection method Technical requirements
IPS), the image-intensifier
tube screens shall
illuminate and, after dioptric
adjustment of
the eyepieces (Ref. Step
6.2.20) and focusing of the
lenses (Ref. Step 7.4),
nearby objects shall be
clearly seen in the unit field
of view.
4 Quality of
image viewed by
unit
The check is
conducted by the pilot
in the course of
individual adjustment
of the night-vision
goggles (Ref. Step
6.2.21)
The unit shall provide for
distinct identification of the
test pattern lines in all four
directions and easy reading
of the check text, which is
indicative of the fact that
the unit is ready for use.
9 TROUBLE SHOOTING
9.1 Normal operation of the NVS 6 is substantiated by the following
indications:
(a) Feasibility of observing the illumination of the screens (without
flashes and twinkling) of each of the two image-intensifier tubes through
the eyepieces.
(b) Clear visibility of nearby objects and the test pattern lines in
the course of preflight preparation.
9.2 All these signs are indicative of the adequate operational status
of the NVS 6 for ensuring its normal functioning.
9.3 The list of the most frequent and probable troubles of the NVS
6 is given in Table 4.