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|  MIL-N-81497A(AS)
3.5.4.13.3
Gyro Torquing Signals - The Gyroscope Assembly
shall accept gyroscope torquing signals in the form of digital logic
signals from the Computer, Navigation. Characteristics shall be
in accordance with 3.5.5.12.7.
3.5.4.13.4
Azimuth Resolver Signal - The Gyroscope Assembly
shall supply multi-speed azimuth data in the form of a dual speed
resolver with 8:1 ratio between fine and coarse outputs. These signals
shall be provided to the Computer, Navigation for computation of
true heading and the Control, Gyroscope Assembly for initial
coarse alignment of the Gyroscope Assemblies azimuth gimbal to North.
Characteristics are in accordance with 3.5.5.12.1.
3.5.4.13.5
Attitude Synchro Siqnals - The Gyroscope Assembly
shall provide 2 isolated synchro output signals on both of its roll
and pitch gimbals.
Synchro requirements shall be in accordance with
Table IV.
3.5.5
Computer, Navigation CP-924/ASN-84 - The Computer,
Navigation shall meet the followlng requirements:
3.5.5.1
Function - The Computer, Navigation shall be a
general purpose digital computer and shall be programmed to solve
the navigation equations for inertial navigation, Doppler damped
inertial navigation, Slave and Free attitude heading reference modes.
The Computer, Navigation shall contain the program and switching
output discretes to permit both ground and inflight operation and
shall provide the control signals to maintain the Gyroscope Assembly
as the stabilized inertial reference. Digital output signals to
external central data processors shall be provided, reference 3.4.3.4.4.
The Computer, Navigation shall contain built in test circuitry and
program subroutines which shall determine computer GO or NO-GO condi-
tions.
3.5.5.2
Form Factor - Form factor of the equipment shall
conform to EI-554. Maximum envelope dimensions shall be 17.03 inches
by 5.17 inches by 8.4 inches.
Weight - The weight of the Computer, Navigation
3.5.5.3
shall not exceed 21.65 pounds.
3.5.5.4
Contents of Unit - The Computer, Navigation shall
contain the following major assemblies.
42
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