Figure 5-12. Main Discrete Inputs Page; Figure 5-13. Main Discrete Outputs Page - Garmin GPS 400W, GNC 420W Installation Manual

5.3.9 MAIN DISCRETE INPUTS Page
Select the MAIN DISCRETE INPUTS Page (see Figure
5-12) if the encoding altimeter input is used. Verify that
the DECODED ALTITUDE field indicates the correct
altitude.
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
RMT OBS
RMT CDI
RMT RCL [1]
[1] Main software version 3.00 or later
5.3.10 MAIN DISCRETE OUTPUTS Page
Select the MAIN DISCRETE OUTPUTS Page (see
Figure 5-13). This page allows you to verify the
operation of any external annunciators and switches that
are present in the installation.
DISCRETE TOGGLE
Selection
APR
GPS
INTEG
MSG
OBS
TERM
VLOC
WPT
ILS/GPS APR
GPS SELECT
Page 5-12
Rev. E
Verify That:
The box is filled in while a remote OBS switch is pressed.
The box is filled in while a remote CDI source select switch is pressed.
The box is filled in while the COM remote recall switch is pressed.
Verify That:
The APR annunciator is active and inactive as selected on this page.
The GPS source select annunciator is active and inactive as selected
on this page.
The INTEG annunciator is active and inactive as selected on this page.
The MSG annunciator is active and inactive as selected on this page.
The OBS annunciator is active and inactive as selected on this page.
The TERM annunciator is active and inactive as selected on this page.
The VLOC source select annunciator is active and inactive as selected
on this page.
The WPT annunciator is active and inactive as selected on this page.
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).
The GPS SELECT output is active and inactive as selected on this
page (NOTE: This output is connected to the autopilot GPS SELECT
input, not to an annunciation, and therefore this is for bench testing
purposes only).

Figure 5-12. MAIN DISCRETE INPUTS Page

Figure 5-13. MAIN DISCRETE OUTPUTS Page

400W Series Installation Manual
190-00356-02