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Page Title:
Electrical characteristics - Passive |
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|  MIL-P-48571(MU)
3.8.6 Parallelism of reticle and image, passive. The image of a tar-
get line originally parallel to Datum Plane "J" shall be parallel to the
horizontal reticle line within 2.0 degrees of arc.
3.8.6.1 Parallelism of reticle and image, daylight.- The image of a
target line originally parallel to datum plane "J" shall be parallel to
the horizontal reticle line within 2.0 degrees of arc.
3.8.7 Objective focusing range.
3.8.7.1 Daylight.- Rotation of Eccentric 8205635 shall cause the ob-
jective assembly to travel a minimum of 0.010 inch in each direction from
the position established in 3.8.2.
3.8.7.2 Passive.- Rotation of Ring 11733436 shall cause, the objective
to bring targets 50 meters to 3000 meters into focus.
3.8.8 Resolution.
3.8.8.1 Daylight.- The resolution shall be 10 seconds of arc or less
in all four meridians. Eyepiece focus shift between any two meridians shall
not exceed 0.25 diopter-
3.8.8.2 Passive.- The resolution shall be one minute of arc or less
in two meridians. Eyepiece focus shift between the meridians shall not
exceed 0.25 diopter.
3.8.9 Electrical characteristics - Passive.
3.8.9.1 Image intensifier tube.- The image intensifier tube shall be
energized by the application of +24 6.0 VDC to Contact 11733497 or appli-
cation of 3 VDC 0.3 VDC to Connector 11733493 (Ref. Dwg. F11733401).
3.8.9.2 Image steadiness.- There shall be no visible flicker, no move-
ment of the image nor audible sparking when observed for one minute. This
observation shall be made after the expiration of 15 seconds tube stabili-
zation time.
3.8.9.3 Reticle brightness.- With a minimum of 18 and a maximum of
30 volts applied to the Contact 11733497 the reticle markings shall be
visible when viewing through the eyepiece with the image intensifier tube
energized (see 3.8.9.1). The reticle brightness shall be adjustable from off
to full bright by adjusting the reticle brightness control Knob MS91528-0E1B
clockwise.
3.8.9.4 On-Off Switch.- The image intensifier tube shall shut down
when + 24 VDC 6 VDC is removed from Contact 11733497 with the on-off
switch in the on position. The tube shall not be energized by reapplicat-
ion of the 24 VDC unless the on-off switch is recycled from off to on.
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