Garmin GTX 330 Installation Manual page 61

5.2.17 ADS-B TX Page (ES Enabled Units Only)
ADS-B TX
This page is used to support ADS-B configurations.
Automatic Dependant Surveillance-Broadcast (ADS-B) TX can be set to DISABLE, ENABLE, or PILOT
SET. DISABLE is the default. When ADS-B TX is set to DISABLE the BDS items listed in
that are marked "ES Enabled Units Only" are not active (no extended squitter). When ADS-B TX is set to
PILOT SET, ADS-B transmissions are active at power-on.
1090 IN can be set to NO or YES, default is NO. UAT IN can be set to NO or YES, default is YES.
The data for these fields should be set to match the type of receiver installed in the aircraft. This info is
used to inform the ground station what type of receiver is in the aircraft and allows the ground station to
tailor the uplink data to match the type of receiver(s) in use for a particular operating area. A GDL 39 is
capable of receiving both 1090 Mhz ES and 978 Mhz UAT, so both of these fields (1090 IN and UAT IN)
would normally be set to YES (for installations using a GDL 39). However, (depending upon the
installation) these fields won't always match.
5.2.18 EHS Page
EHS
Sets Enhanced Surveillance (EHS) to DISABLE or ENABLE.
ENABLE is the default. When EHS is set to DISABLE the BDS items listed in
marked "EHS Only" are not active (no enhanced surveillance).
5.2.19 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.
5.2.20 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.
190-00207-02
Rev. U
ADS-B TX Page
EHS Page
Section 1.6
GRAY CODE INPUT Page
EXTERNAL SWITCH Page
GTX 330/330D Installation Manual
Section 1.6
that are
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