Garmin GTX 32 Installation Manual - Page 31

Altimeter Inputs, Pin Name, Connector, Altimeter Interconnect, Dual GTX 32 Installation, Altimeter

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4.3.1 Altimeter Inputs Table 4-3. Encoded Altitude Pin Assignments Pin Name Connector Pin I/O ALTITUDE D4 P3271 18 In ALTITUDE A1 P3271 3 In ALTITUDE A2 P3271 5 In ALTITUDE A4 P3271 6 In ALTITUDE B1 P3271 9 In ALTITUDE B2 P3271 11 In ALTITUDE B4 P3271 12 In ALTITUDE C1 P3271 10 In ALTITUDE C2 P3271 4 In ALTITUDE C4 P3271 7 In ALTITUDE COMMON SIGNAL GROUND P3271 25 -- 4.3.2 Altimeter Interconnect, Dual GTX 32 Installation Refer to Figure C-4 Sheets 1 and 2 for Dual GTX 32 altimeter interconnections. A dual GTX 32 installation can accept either parallel wire gray code altimeter input or RS-232 serial data input as shown. For a complete dual installation containing two encoders, it is best to connect one encoder to each transponder. 4.3.3 Altimeter Calibration and Checkout Refer to GNS 480 (CNX80) Installation Manual 560-0982-01 for calibration procedures and gray code altitude checkout. 4.3.4 Altimeter Selection Priority When connecting the transponder to a GNS 480 (CNX80), the installer must be aware of the GTX 32 priority for selecting encoded altimeter interconnections. The GTX 32 searches in this sequence for altitude, and stops when it finds a valid pressure altitude input. Altitude reporting equipment order of precedence: 1) RS-232 data from GNS 480 (CNX80) or Garmin Integrated Flight Deck system 2) RS-232 Fuel/Air Data Computer (if configured W/ALT.) 3) Parallel wire Gray Code input 4) Shadin Altitude Serializer/Encoder 5) Icarus Altitude Serializer/Encoder GTX 32 Installation Manual 190-00303-60 Page 4-3 Revision F

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GTX 32 Installation Manual
Page 4-3
190-00303-60
Revision F
4.3.1
Altimeter Inputs
Table 4-3.
Encoded Altitude Pin Assignments
Pin Name
Connector
Pin
I/O
ALTITUDE D4
P3271
18
In
ALTITUDE A1
P3271
3
In
ALTITUDE A2
P3271
5
In
ALTITUDE A4
P3271
6
In
ALTITUDE B1
P3271
9
In
ALTITUDE B2
P3271
11
In
ALTITUDE B4
P3271
12
In
ALTITUDE C1
P3271
10
In
ALTITUDE C2
P3271
4
In
ALTITUDE C4
P3271
7
In
ALTITUDE COMMON SIGNAL GROUND
P3271
25
--
4.3.2
Altimeter Interconnect, Dual GTX 32 Installation
Refer to Figure C-4 Sheets 1 and 2 for Dual GTX 32 altimeter interconnections.
A dual GTX 32
installation can accept either parallel wire gray code altimeter input or RS-232 serial data input as shown.
For a complete dual installation containing two encoders, it is best to connect one encoder to each
transponder.
4.3.3
Altimeter Calibration and Checkout
Refer to GNS 480 (CNX80) Installation Manual 560-0982-01 for calibration procedures and gray code
altitude checkout.
4.3.4
Altimeter Selection Priority
When connecting the transponder to a GNS 480 (CNX80), the installer must be aware of the GTX 32
priority for selecting encoded altimeter interconnections.
The GTX 32 searches in this sequence for
altitude, and stops when it finds a valid pressure altitude input.
Altitude reporting equipment order of precedence:
1)
RS-232 data from GNS 480 (CNX80) or Garmin Integrated Flight Deck system
2)
RS-232 Fuel/Air Data Computer (if configured W/ALT.)
3)
Parallel wire Gray Code input
4)
Shadin Altitude Serializer/Encoder
5)
Icarus Altitude Serializer/Encoder