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MIL-N-81497A(AS)
Power Pushbutton Switch -  The Power pushbutton
3.5.1.5.2
switch shall be used to start equipment operation in any of the Mode
Selector positions listed in 3.5.1.5.1.
Latitude Backup Thumbwheel Switches -  Latitude
3.5.1.5.3
data shall be manually entered through four thumbwheel switches in the
Slave and Free Modes.  The latitude data shall consist of numeric
data up to 90 DEG (in DEG, and tenth's of DEG) and alpha North or
South (N or S) position.
Grid Slew Switch -  A spring return, 5 position
3.5.1.5.4
switch shall be provided for the slewing of the grid heading output
Switch controls shall be for
to a desired datum in the Free Mode.
both clockwise and counterclockwise fast and slow slew operations.
Spring return shall be to the zero center position.
Displays -  The Control, Navigation shall have the
3.5.1.6
following displays as shown in Figure 2.
MAG SYNC Indicator -  The Magnetic Synchronization
3.5.1.6.1
indicator shall be a DC microammeter which shall indicate the degree
of synchronization of the equipment magnetic heading output during the
Inertial, Slave and Compass Modes with the ML-1 input signal.
ON Lamp -  An On lamp shall be provided to inform
3.5.1.6.2
the operator that the equipment is operational and that the Power
pushbutton has been operated.
SYSTEM FAIL Lamp -  The System Fail lamp shall
3.5.1.6.3
visually warn the operator that the equipment has failed. This shall
be generated in the equipment's Computer, Navigation and shall be a
4V DC control signal.
ALIGN Lamp -  A visual indication shall be provided
3.5.1.6.4
to inform the operator that the equipment is in its alignment cycle
during any of the operational modes described in 3.5.1.5.1. This
signal shall be generated in the Computer, Navigation and shall be a
4V DC control signal.
3.5.1.6.5
TEST Lamp -  A visual indication shall be provided
to inform the operator that the equipment is in its Self Test submode.
This signal shall be generated in the Computer, Navigation and shall
be a 4V DC control signal.
28

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