Garmin GTX 3X5 Series Installation Manual - page 44

190-01499-02

GTX 3X5 Transponder TSO Installation Manual

Rev. 4

Page 3-14

Table 3-15   Barometric Pressure Setting Source Priority

NOTE

If the Air Data Select discrete input is configured and the source is EFIS/Air Data, Label 

235 will have priority over Label 234.

Table 3-16   MCP/FCU Selected Altitude Source Priority

Priority

Source

1

ARINC 429 Label 235 from an EFIS/ADC

2

ARINC 429 Label 234 from an EFIS/ADC

3

ARINC 429 Label 235 from an AFCS

4

ARINC 429 Label 234 from an AFCS

5

RS-232 from an ADC

6

RS-232 from a remote control panel

7

HSDB Barometric Pressure Setting from a GX000

8

HSDB Barometric Pressure Setting from GDU 620 #1

9

HSDB Barometric Pressure Setting from GDU 620 #2

Priority

Source

1

ARINC 429 Label 102 from an AFCS

2

ARINC 429 Label 102 from an EFIS/ADC

3

RS-232 from a remote control panel

4

HSDB Selected Altitude from a GX000

5

HSDB Selected Altitude from GDU 620 #1

6

HSDB Selected Altitude from GDU 620 #2