ARINC 708 Display Data Bus Word Format
page A- 2
Excalibur Systems
Appendix A-2
ARINC 708 Word Bits
Control Accept Function
Mode Annunciation
Bits 14 – 18 should be independently coded to indicate (when to set to 1) to the
display or other receiver device the following:
Matrix Code
Bit 10
Bit 9
Function
0
0
0
Do not accept control
1
0
1
IND 1 accept control
2
1
0
IND 2 accept control
3
1
1
All INDs accept control
Table A-2
Control Accept Functions
Bit
18
17
16
15
14
Function
0
0
0
0
0
Normal
1
0
0
0
0
Antenna stability limits
0
1
0
0
0
Sector scan
0
0
1
0
0
Anti clutter
0
0
0
1
0
Weather alert
0
0
0
0
1
Turbulence alert
Table A-3
Mode Annunciation
Bit
Code indicator
14
Automatic sensing of a
Turbulence alert
has occurred
15
Automatic sensing of a reflectivity
Weather alert
has occurred
16
Clutter elimination circuitry is in operation
17
Reduced
Sector scan
is in operation
18
Aircraft attitude and /or tilt control exceeds the system’s design limits.
Table A-4
Mode annunciation code indicator
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