SKY899
Installation Manual
Page A-4 - Appendix A
009-11900-001
July 18, 2013
Revision F
SIGNAL
CHARACTERISTICS
Audio (Alert) Output
This output is directly compatible with industry standard audio panels
(see paragraph 2.10)
NOTE
Audio output from the TRC is transformer isolated.
This output is disabled when a terrain warning alarm is detected (see
paragraph 2.7.1)
CONNECTION
Connector-Pin
Signal Name
P1-89
(AUDIO_H) - 600
Ω
P1-90
(AUDIO_L) - 150
Ω
P1-91
(AUDIO_C) Audio Common
CABLE
Minimum 22 AWG twisted shielded pair cable
for lengths up to 30 ft.
POWER
40 mW into a 600
Ω
load. Audio level is
adjustable via service menu.
FREQUENCY
0 - 3.0 kHz
LOAD Z
Selectable 150 or 600
Ω
Debug Port
NO CONNECTION TO EXISTING AIRCRAFT WIRING
.
The Debug Port
(RS-232) is used for laptop interface to support system setup, post
installation checkout and troubleshooting. The port defaults to the
following settings (no hardware flow control):
Baud Rate:
19,200
Data Bits:
8
Parity:
None
Stop Bits:
1
Flow Control: Xon/Xoff
CONNECTION
Connector-Pin
Signal Name
J7-2
DIAG_RX
J7-3
DIAG_TX
J7-5
DIAG_GND
J7-7
CTS
J7-8
RTS
Extended Audio Switch
(Required to enable the
ViP™ Extended Audio
Callout feature)
An extended audio callout switch is required when interfacing to the extended
audio switch input P1-32 of the TRC899. Units with Mod D and software 1.8
or higher are ViP™ Extended Audio Callout capable. This switch allows the
pilot to turn on and off (mute) the range, relative altitude and relative bearing
callout from the aural TA’s. When the switch is in the “Normal” position the
standard phrase “Traffic, Traffic” is still annunciated.
Any SPST toggle switch (1/2 A @ 28 V dc) may be used.
CONNECTION
Connector-Pin
Signal Name
P1-32
EXT_AUDIO_SW
CABLE
Minimum 22 AWG unshielded cable
VOLTAGE
Active:
Min: 0.0 V dc
Max: 1.5 V dc
Inactive
Min: 3.5 V dc (open)
Max: 5.0 V dc
(internal 10K pull-up resistor)
The document reference is online, please check the correspondence between the online documentation and the printed version.