SYSTEM INSTALLATION MANUAL
89000016
(3)
Traffic Test Input
(a)
The traffic test input indicates the traffic test status of a 429 traffic display. The KGX will
send traffic test data to ARINC OUT 1 when the traffic test input is active.
(4)
Anonymous Mode Input
(a)
The anonymous mode allows the KGX to broadcast a self-assigned random temporary
address and no call sign when enabled. A dedicated pilot interface is required to
provide this input.
(b)
The anonymous mode cannot be used on:
• Aircraft equipped with a Mode S transponder.
• Aircraft with dual link 1090ES and UAT ADS-B out systems operating at the same time.
(c)
The anonymous mode is not active:
• During the first 90 seconds after the KGX powers on.
• When the squawk code is set to anything other than 1200.
G.
Discrete Outputs
(1)
Two discrete outputs are available to supply UAT status and operational information to other
equipment. The two discrete output connection pins are shown in Table 1018.
Table 1018. Discrete Outputs
Pin
Signal
Electrical
I/O
Description
J1-28
TX SUPPRESS
Vin - 1.5 volts
O
L-band suppression bus
J1-41
UAT STATUS
Open/ground
O
ADS-B status
(2)
UAT Status Output
(a)
The UAT status output is an active low, open collector output capable of sinking a
maximum of 100 mA. The UAT status output indicates a UAT transmit or receive system
failure when continuously grounded. UAT status output also indicates the loss of valid
GPS data from an internal or external GPS.
(b)
If the internal or external GPS is not functioning, reporting a failure, or reporting invalid
GPS position data, this discrete will toggle between ground and open at a rate of
approximately four times each second.
NOTE:
Failure status of the UAT as well as loss of UAT position data must be
annunciated to the pilot. The connected display (or KGX control panel)
typically provides annunciation. This discrete can be used to drive an
annunciator when a display or KGX control panel is not installed or capable of
displaying status.
H.
TX Suppression Output
(1)
The TX suppress output is for suppressing other L-band equipment during UAT transmissions.
TX suppress outputs a high (Vin - 1.5 volts) only during UAT ADS-B message transmissions
and is low otherwise. The TX suppress output is typically connected to the transponder
suppression bus.
NOTE:
Receiver only installations do not need to connect to the transponder suppression
bus.
EFFECTIVITY
ALL
Page 1016
22 Dec 2016
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