NAV SENSOR ALERT VARIABLE ALERT MESSAGE BLOCK
Figure 3-5. Status Line SA AB0329
INDICATION FUNCTION
WPT The identi.er of the present TO waypoint. Displays WPT for regular waypoint or MOB for a mobile waypoint. The indicators blink several times prior to waypoint capture. Labels will .ash between normal and inverse video when a waypoint is captured (minimum 3 seconds).
3.4.2.8 Status Line. The status line is between the .xed header and variable screen data of the CDU (Figure 3-5).
INDICATION FUNCTION
Bus Control Boxed B indicates that the CDU is indicator the bus controller.
Nav Sensor Alerts
AD Air data source failed.
INDICATION FUNCTION
GP GPS failed.
DO Doppler failed.
Variable Alert See below for meanings.
Message block
CLASSIFIED COMSEC data (i.e. WODS) in
CDU.
CUE SINCGARS Cue frequency
reception alert.
DEGR RDY Degraded nav ready provision.
EMERG COM Emergency control panel (ECP)
activated.
INCM-CALL ALE/ECCM incoming call.
UPDT RQD Update required to Doppler.
WPT Waypoint capture alert (minimum 3
seconds).
3.4.3 Operation.
3.4.3.1 Normal Start-up. When power is .rst applied to the system, the following sequence of events occurs:
1. Each AMS unit perform a internal built in test (BIT).
a.
AMS annunciators will .ash, indicating a lamp test.
b.
The display screen will display the soft-ware version loaded. This will remain for approximately 10 seconds.
c.
The display screen will then change to the initialize screen, which shows the status of system time and navigation sensors.
2. The .rst CDU to .nish up BIT (normally the copilot’s) becomes the bus controller (BC), while the other becomes the remote terminal (RT). The BC CDU responds to inputs margin-ally faster than the RT CDU. The BC CDU performs all the required communications and control sequences to tune the radios, and com-putes navigation information for display. The RT CDU passes its commands to the BC CDU for coordination of full systems operation.
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3.4.3.2 Initialization. The initialization screen is the first default screen upon power up (Figure 3-6). After the CDU .rst powers up, if the DGNS is reporting its GPS time and date, the CDU system time and date will default to the GPS reported values. This date is in UTC. System time may be changed after this .rst update to local time, if desired. If the GPS time and date are not available, then the system date will default to 01/01/9X and the time .eld will default to
00:00:00.
3.4.3.2.1 Initialize Position. The initial position default will be the position as stored by the CDU in non volatile memory on shutdown. This position is stored so long as the system position was valid for at least 1.0 minute with weight-on-wheels at shutdown.
NOTE
If the aircraft has been moved since shut-down, it may be necessary for the operator to reenter the new initial position for normal start-up.
1. SYSTEM DATE/TIME soft key -Press to correct date time, if not correct in screen. Enter correct date and time in scratch pad.
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AB0330
SA
2.
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