190-01004-02
GTN 625/635/650 TSO Installation Manual
Rev. F
Page 6-49
6.9.6
GDL 88 Page
(software version 3.00 or later)
Access the GDL 88 page, as shown in Figure 6-46, by touching the ‘GDL 88’ key on the External Systems
page.
Figure 6-46. GDL 88 Page
6.9.6.1 GDL 88 Diagnostics
Access the GDL 88 Diagnostics page, as shown in Figure 6-47, by touching the ‘GDL 88’ key on the
External Systems page, followed by the ‘Diagnostics’ key.
Figure 6-47. GDL 88 Diagnostics Page
System Status
This page displays general information such as unit type and serial number of the GDL 88. It also displays
information about the Main Board, GPS/WAAS board, and the RF Board. Power Statistics and
Temperature Statistics are also displayed.
Error Log
This page displays the option of writing any errors found with the GDL 88 to an SD card or clearing the
error log.
Faults
This page displays a list of GDL 88 and ADS-B faults. A description of each fault and troubleshooting
procedure can be found in the GDL 88 STC Installation Manual, P/N 190-01310-00.
Discrete Inputs
This page displays the state of the GDL 88’s discrete input pins.
Discrete Outputs
This page displays the state of the GDL 88’s discrete output pins.
GPS/SBAS Data
The WAAS diagnostics page displays the WAAS engine information and PPS status information. For
GDL 88 units with an internal WAAS engine, this page allows the GDL 88 internal WAAS engine to be
reset.
Summary of Contents for GTN 625
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