Figure 6-48. Gdl 88 Configuration Page - Garmin GTN 625 Installation Manual

External Data
This page displays air data and control panel data.
ARINC Inputs
The ARINC Inputs diagnostics page allows the display of ARINC 429 data that is being received over each
GDL 88 ARINC 429 port. Each port can be chosen for display by touching the 'Port' key and toggling
between the input ports. Select a port to display. The GTN will then display the label, SSM, Data, and SDI
for each GDL 88 ARINC 429 input port. This is useful for determining if the expected labels are being
received and also for troubleshooting incorrect or swapped wiring to the input ports. The data log can be
paused by toggling the 'Pause' key. Clear the data log by touching 'Clear Log.'
RS-232 Inputs
The RS-232 Inputs diagnostics page allows the display of serial data that is being received and is useful for
determining if the GDL 88 is receiving data on each connected port. Select the desired port by touching the
key labeled 'Port' and selecting the RS-232 channel from the list. The data log can be paused by toggling
the 'Pause' key. Clear the data log by touching the 'Clear Log' key.
HSDB (Ethernet)
The HSDB Ethernet diagnostics page allows the status of each HSDB port to be displayed. This page
displays whether or not each port is receiving data and displays whether the port is connected or not
connected. The configuration status of each installed HSDB LRU is also displayed.
6.9.6.2 GDL 88 Configuration
Access the GDL 88 Configuration page, as shown in Figure 6-48, by touching the 'GDL 88' key on the
External Systems page.

Figure 6-48. GDL 88 Configuration Page

Aircraft
This aircraft page allows the configuration of aircraft information and settings.
Antenna
The antenna page allows configuration of UAT/1090, GDL 88 GPS/SBAS, and External GPS/SBAS
antenna settings.
Audio
This page configures the GDL 88 analog audio output volume level and voice type.
Ports
This page allows the configuration of the RS-232, ARINC 429, and HSDB (Ethernet) ports.
GTN 625/635/650 TSO Installation Manual 190-01004-02
Page 6-50 Rev. F