GTN 725/750 TSO Installation Manual
Page 4-9
190-01007-02
Rev. A
4.3
Power, Lighting, And Antennas
This section covers the power input requirements, lighting bus input, and antenna connections.
See Figure
TBD
for interconnect information.
4.3.1 Power
Pin Name
Connector
Pin
I/O
AIRCRAFT POWER (MAIN)
P1001
19
In
AIRCRAFT POWER (MAIN)
P1001
20
In
AIRCRAFT POWER (COM)
P1003
30
In
AIRCRAFT POWER (COM)
P1003
43
In
AIRCRAFT POWER (COM)
P1003
44
In
AIRCRAFT POWER (NAV)
P1004
51
In
AIRCRAFT POWER (NAV)
P1004
52
In
AIRCRAFT GROUND (MAIN)
P1001
77
--
AIRCRAFT GROUND (MAIN)
P1001
78
--
AIRCRAFT GROUND (COM)
P1003
37
--
AIRCRAFT GROUND (COM)
P1003
38
--
AIRCRAFT GROUND (COM)
P1003
40
--
AIRCRAFT GROUND (NAV)
P1004
61
--
AIRCRAFT GROUND (NAV)
P1004
62
--
The power inputs P1001-19 and P1001-20 provide power for everything except for the COM radio and
NAV radio. Both pins must be connected.
The power inputs P1003-30, P1003-43, and P1003-44 provide power for the COM radio. All three pins
must be connected.
The power inputs P1004-51 and P1004-52 provide power for the NAV radio. Both pins must be
connected.
4.3.2 Lighting
Bus
Pin Name
Connector
Pin
I/O
LIGHTING BUS 1 HI
P1001
18
In
LIGHTING BUS 1 LO
P1001
17
In
LIGHTING BUS 2 HI
P1001
42
In
LIGHTING BUS 2 LO
P1001
61
In
The GTN can be configured to track 28 VDC, 14 VDC, 5 VDC or 5 VAC lighting buses using these
inputs. Two lighting buses allow for independent control of display and bezel lighting. Alternatively, the
GTN can automatically adjust for ambient lighting conditions based on the photocell. Refer to Section
TBD
for instructions on configuring the lighting inputs.
4.3.3 Antennas
Pin Name
Connector
I/O
GPS/WAAS ANTENNA
P1006
In
COM ANTENNA
P1007
I/O
NAV ANTENNA
P1008
In
The GPS/WAAS, COM, and NAV antennas use BNC coaxial connectors on the connector backplate.
Reference Figure
TBD
for splitter/diplexer block diagrams.
Summary of Contents for GTN 725
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