Garmin GPS 500, Installation Manual

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500 SERIES INSTALLATION MANUAL Page 5-9
190-00181-02 Rev Q
5.2.8 MAIN DISCRETE I/O Page
Select the MAIN DISCRETE I/O Page (see Figure 5-10).
GRAY CODE
If the encoding altimeter input is used, verify that the
DECODED ALTITUDE field indicates the correct
altitude.
EXTERNAL SWITCH STATE
This allows you to verify the operation of any external
switches that are present in the installation.
Selection Verify That:
RMT CDI
The box is filled in while a remote CDI source select switch is pressed.
RMT OBS The box is filled in while a remote OBS switch is pressed.
TER INHB
The box is filled in when the terrain functionality is inhibited either via
the 500 Series unit or via the external annunciator (if installed).
DISCRETE TOGGLE
This allows you to verify the operation of any external annunciators that are present in the installation.
Selection Verify That:
APR The APR annunciator is active and inactive as selected on this page.
GPS The GPS source select annunciator is active and inactive as selected
on this page.
INTEG
The INTEG annunciator is active and inactive as selected on this
page.
MSG The MSG annunciator is active and inactive as selected on this page.
OBS The OBS annunciator is active and inactive as selected on this page.
TERM The TERM annunciator is active and inactive as selected on this page.
VLOC
The VLOC source select annunciator is active and inactive as selected
on this page.
WPT The WPT annunciator is active and inactive as selected on this page.
ILS/GPS APR The ILS/GPS APPROACH output is active and inactive as selected on
this page (NOTE: This output is connected to the autopilot ILS
ENGAGE input, not to an annunciation, and therefore this is for bench
testing purposes only).
TER CAUT The TER CAUT annunciator is active and inactive as selected on this
page.
TER INHB The TER INHB annunciator is active and inactive as selected on this
page.
TER N/A
The TER N/A annunciator is active and inactive as selected on this
page.
TER TEST
The TER TEST annunciator is active and inactive as selected on this
page.
TER WARN The TER WARN annunciator is active and inactive as selected on this
page.
Figure 5-10.
MAIN DISCRETE I/O Page