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|  MIL-N-81497A(AS)
Data to Computer, Navigation - Alpha-numeric
3.5.3.7.3
data shall be transferred to the Computer, Navigation serially in
one 20 bit data word which contains the punched in keyboard data.
Connectors - The electrical connector
Electrical
3.5.3.8
shall be:
Function
Type
Designation
Cable to
MS3114-H-22-55PW
5J1
Aircraft
Edge Lighting - Edge lighting shall be supplied
3.5.3.9
to the Indicator, Position from external sources. Edge lighting
shall be 5 to 28V, variable, 400 Hz, single phase.
Advisory Lamp Excitation - All advisory lamps shall
3.5.3.10
be energized with +18 V DC.
Lamp Check Functions - The Indicator, Position
3.5.3.11
shall contain diode isolated circuitry to test all advisory lamps,
when the equipment is operating upon application of an external
+28V DC test signal.
Color - The Indicator, Position unit including case
3.5.3.12
and front panel shall be lusterless gray No. 36231 as specified in
FED-STD-595.
Indicator, Position Mounting - The Indicator, Position
3.5.3.13
shall be a console mounted unit in accordance with the requirements of
MIL-C-6781.
Gyroscope Assembly CN-1231/ASN-84 - The Gyroscope
3.5.4
Assembly shall meet the following requirements.
Function - The Gyroscope Assembly shall furnish
3.5.4.1
unambiguous signals of roll, pitch and azimuth, and signals from
orthogonally mounted accelerometer axes. During alignment operation
the Gyroscope Assembly shall provide a means for establishing a ref-
erence orientation with respect to true North and the local vertical.
During the operational modes, orientation shall be maintained
by means of the Gyroscope Assembly's own inertial properties and its
gyro torquing capabilities. The Gyroscope Assembly shall have internal
relays which shall make it capable of switching its mode of operation
and built in test circuitry (BITE) which shall be used to determine
unit malfunction.
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