Audio Output; 1Pps Interface; Configuration Module - Garmin GTX 3x5 Series Installation Manual

5.11 Audio Output

AUDIO OUT
GROUND (audio ground)
The audio output is used to provide aural traffic alerts. The output is capable of 100mW into a 500Ω load.

5.12 1PPS Interface

1PPS A
1PPS B
The 1PPS Interface can be configured as either an input or output, depending on the GTX 3x5
configuration and the aircraft installation.
With either a GTX 335 or GTX 345 with internal GPS, the 1PPS can be used as an output to provide 1PPS
to other equipment in the aircraft.
With a GTX 345 without internal GPS, the 1PPS can be configured as an input to provide timing
information for the ADS-B UAT receiver functions.

5.13 Configuration Module

The configuration module interface is used for connection to either a configuration module or an optional
pressure sensor module.
Pin Name
CONFIG CLOCK
CONFIG DATA
CONFIG POWER
GROUND (config module)
The configuration and pressure sensor module kits include a wire harness for connection to the GTX 3x5
D-sub connector. Connect using the wire colors as listed in the table.
The configuration module is used to store the specific aircraft installation configuration settings.
The pressure sensor module can be used to provide the pressure altitude for the transponder. The pressure
sensor module also includes configuration memory function for storing the installation configuration, so
when used, the separate configuration module is not needed.
190-01499-02
Rev. 1
Pin Name
Pin Name
Connector
P3251
P3251
Connector
P3251
P3251
Color Connector
White P3251
Yellow P3251
Red P3251
Black P3251
GTX 3x5 TSO Installation Manual
Pin I/O
46 O
47 O
Pin I/O
4 I/O
26 I/O
Pin I/O
1 O
22 I/O
43 O
23 O
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