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|  MIL-C-48458B(AR)
REQUIREMENTS
3.
3.1 Fabrication. The gunner's control unit (GCU) electronics circuit
card assembly, herein referred to as the assembly, shall be manufactured in
accordance with Drawing 11732392 and drawings pertaining thereto and, when
assembled, shall meet the requirements of this specification. (See 4.5.1)
3.1.1 Function. The assembly shall provide the following functions:
a. Ammo select switching logic and fail lamp diode logic for the GCU.
b. GCU common zero and zeroing signals switching logic.
c. Scaling resistors for various GCU outputs.
3.1.2 General specifications. The following provisions of MIL-F-13926
apply: (See 4.5.1)
a.
Order of precedence
b.
Dimensions and tolerances
c.
Inorganic protective surface finishes
d.
Part identification and marking
e.
Workmanship
3.1.3 Ambient conditions. Standard ambient conditions shall be as
follows:
73F + 18F
a. Temperature
b. Relative humidity
50 percent 30 percent
28.5 + 2.0 -3.0 in. Hg,
c. Atmospheric pressure
3.2 First article. When specified (see 6.2), the contractor shall
furnish sample units for first article inspection and approval (see 4.4 and
6.2).
3.3 Performance. Unless otherwise specified, the assembly shall meet the
performance requirements specified herein under standard ambient conditions of
3.1.3.
3.3.1 Pin-to-pin resistance. The resistance between pins as listed in
table II shall be as specified. (See 4.6.2.1)
3.3.2 Ammo select switching logic. With the interconnections (item 3)
and power (item 1.1) of table I applied, establishment, in any item number
order, of the table III items input conditions shall result in the
corresponding ordered output conditions specified. (See 4.6.2.2)
3
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