Install Manual Part 3

SKY497
Installation Manual
A-3
Rev. C
SIGNAL CHARACTERISTICS
ARINC 429 External Interface (Continued).
Both transmitters (data sources) must be set to the same speed. The TRC
will automatically adjust both receivers to the speed of the first detected
incoming data.
NOTE
If 429 barometric altitude is used, it should be from the same
source that is interfaced with the transponder or it must be at
least as accurate as that source, i.e., ± 125 ft.
Once the TRC detects valid ARINC 429 input from a Barometric Altitude
sensor (Label 203), it will accept only 429 data from that sensor.
CONNECTION TRC P1-45 (ARINC-429 RX 1A)
TRC P1-44 (ARINC-429 RX 1B)
TRC P1-43 (ARINC-429 RX 2A)
TRC P1-42 (ARINC-429 RX 2B)
TRC P1-34 (ARINC-429 TX 1A)
TRC P1-33 (ARINC-429 TX 1B)
Audio Alert Output This output is directly compatible with industry standard audio panels
(see para 2.6.7).
NOTE
Audio output from the TRC is transformer isolated.
This output is disabled when a GPWS alarm is detected (see para 2.6.9) .
CONNECTION TRC P1-92 (AUDIO_H) - For 600 Ω audio systems.
TRC P1-91 (AUDIO_L) - For 150-Ω audio systems.
TRC P1-90 (AUDIO_C) Audio Common
CABLE Minimum 22 AWG twisted shielded pair cable for
lengths up to 30 ft.
POWER 400 mW into a 600 Ω load.
FREQUENCY 0 - 3.0 kHz
LOAD Z Selectable 150 or 600 Ω
Diagnostic Port
NO CONNECTION TO EXISTING AIRCRAFT WIRING. The Diagnostic Port
(RS-232) is available to support factory testing and analysis and
SHOULD
BE LEFT UNCONNECTED
. The port defaults to the following settings:
Baud Rate 19,200
Parity: None
Data Bits 8
Stop Bits` 1
CONNECTION TRC J7-2 (DIAG_RX)
TRC J7-3 (DIAG_TX)
TRC J7-5 (DIAG_GND)