UAV-1004270-001
40
Rev A
Mode
To set the transponder operating mode, appropriate enable bits must be
set in the Control message. The mapping of traditional transponder modes
to required Control message enablement bits follows.
Operating Mode
Mode A
Mode C
Mode S
1090ES
STBY
ON (suppress
altitude)
X
X
X
ALT
X
X
X
X
Flight Identification
If Flight Identification is provided in the Control message, that value is
transmitted as Flight ID. If none (all spaces) is provided, the Call
Sign/Aircraft Registration value configured in the device is transmitted.
Air-Ground State
Optionally, air-ground state may be provided in the Control message. To
use air-ground state from the control message, the device must be
configured with a V
S0
of zero. Air-ground logic is described by the following
chart.
Airborne subsonic and supersonic state is automatically determined by
tailBeaconX.
V
S0
== 0
Use
control
input
Ground
Auto A-G
state
algorithm
yes
no
Airborne
airborne set
ground set
ground
determined
airborne
determined
