GTN 625/635/650 TSO Installation Manual
190-01004-02
Page 5-16
Rev. F
5.2.5 Ethernet (HSDB)
The Ethernet-based HSDB (High Speed Data Bus) meets the hardware aspects of IEEE standard 802.3 for
10 base T Ethernet communications.
5.2.6 Main Audio Output
The main audio output is used to play the ‘clicks’ associated with the touch screen, as well as
TAWS/HTAWS alerts on GTN units that are equipped with TAWS/HTAWS.
The audio output will be 60 mW across a 500
Ω
load.
5.2.7 Main Indicator
5.2.7.1 Main Indicator Function
The Main Indicator displays both lateral and vertical deviation from selected course, To/From indications,
lateral and vertical flags and superflags.
The “CDI” key on the screen of the GTN takes the place of remote “NAV/GPS” switches, and is used to
toggle between display of GPS and VOR/ILS navigation on a remote indicator. The navigation source is
annunciated on the display below the ‘CDI’ key. The navigation method is optionally annunciated
externally by connecting to the VLOC ANNUNCIATE output (P1001-52) and GPS ANNUNCIATE
output (P1001-15). GPS and VOR/ILS navigation may be toggled externally when the CDI SOURCE
SELECT input (P1001-39) is momentarily grounded. See Section 5.2.9 and Section 5.2.10 for more
information on the discrete inputs and outputs.
An OBS resolver connection to the GPS is preferred, but not required. For the GTN 650, an OBS resolver
typically is connected to the MAIN OBS inputs for use with the VOR receiver.
Pin Name
Connector
Pin
I/O
ETHERNET OUT 1 A
P1002
8
Out
ETHERNET OUT 1 B
P1002
9
Out
ETHERNET IN 1 A
P1002
6
In
ETHERNET IN 1 B
P1002
7
In
ETHERNET OUT 2 A
P1002
17
Out
ETHERNET OUT 2 B
P1002
18
Out
ETHERNET IN 2 A
P1002
15
In
ETHERNET IN 2 B
P1002
16
In
ETHERNET OUT 3 A
P1002
25
Out
ETHERNET OUT 3 B
P1002
26
Out
ETHERNET IN 3 A
P1002
23
In
ETHERNET IN 3 B
P1002
24
In
ETHERNET OUT 4 A
P1002
4
Out
ETHERNET OUT 4 B
P1002
5
Out
ETHERNET IN 4 A
P1002
13
In
ETHERNET IN 4 B
P1002
14
In
Pin Name
Connector
Pin
I/O
AUDIO OUT HI
P1001
4
Out
AUDIO OUT LO
P1001
23
Out
Summary of Contents for GTN 625
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Page 250: ...GTN 625 635 650 TSO Installation Manual 190 01004 02 Page D 44 Rev F Figure D 32 Reserved ...
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