Page 2-6
GTS 8XX/GPA 65 Installation Manual
Revision 4TP
190-00587-00
The maximum wiring length from the GTS 8XX to the GPA 65 is 45 feet.
Table 2-1. GPA 65 Minimum Wiring Requirements
Line
Number of
Pins/Wires
Length of Wire
Wire Gauge
Specification
+35V
2
Up To 45'
#24 AWG
2
Up To 45'
#24 AWG
1
Up To 30'
#22 AWG
+6V
1
Up To 20'
#24 AWG
2
Up To 45'
#24 AWG
1
Up To 30'
#22 AWG
-5V
1
Up To 20'
#24 AWG
Ground
3
Up To 45'
#24 AWG
The contacts used to facilitate the use of #18 AWG wire for Aircraft Power and Aircraft Ground have
expanded-diameter barrels that extend out from the back of the standard D-sub connector body to
accommodate the larger diameter wire. Appropriate heat shrink tubing should be utilized to provide
sufficient insulation from surrounding contacts.
Ensure that routing of the wiring does not come in contact with sources of heat, RF or EMI interference.
Check that there is ample space for the cabling and mating connectors. Avoid sharp bends in cabling and
routing near aircraft control cables.
NOTE
All appliance to antenna cabling shall bundle top channels as a group and bottom
channels as a group to prevent incorrect wiring between top and bottom channels.
A visual inspection shall be performed to verify that all coaxial cables are connected properly, before
attempting to operate the equipment.
