Garmin GTX330 Installation Manual page 61

5.2.18 Gray Code Input Page
GRAY CODE
This field shows the status (1 = ground, 0 = open) of each of the ten gray code altitude inputs. This
information may aid in installation troubleshooting. This page is not used in systems that contain serial
altitude input.
DECODED ALTITUDE
This field displays the gray code altitude input in feet. Verify that it is the correct altitude.
5.2.19 External Switch State Page
IDENT
This field displays the state of the EXTERNAL IDENT discrete input. The box is filled when
EXTERNAL IDENT is grounded.
STANDBY
This field displays the state of the EXTERNAL STANDBY discrete input. The box is filled when
EXTERNAL STANDBY is grounded. If EXTERNAL STANDBY is active during power-up, the word
FAIL appears on the screen after 30 seconds.
SQUAT
This field displays the state of the SQUAT SWITCH input. The box is filled when the SQUAT SWITCH
input is active (the aircraft is on the ground as configured on the SETUP 2 page).
5.2.20 Analog Input Page
The Analog to Digital Converter counts are shown on the
display, providing troubleshooting data.
14/5V LTG
This field displays the input level of the 14/5 V lighting bus.
PHOTO
This field displays the input level of the photocell.
LCD TEMP
This field displays the input level of the LCD temperature sensor.
28V LTG
This field displays the input level of the 28 V lighting bus.
GTX 330/GTX 330D Installation Manual
190-00207-02
GRAY CODE INPUT Page
EXTERNAL SWITCH Page
ANALOG INPUT Page
Revision R
Page 5-21