Table 2-3. Crimp Contact - Garmin GDL 90 Installation Manual

Installation Procedures
The Garmin AT UAT antenna is vertical polarized, optimized for UHF operation, and designed for
installation in aircraft, including helicopters. The GDL 90 will receive signals from two antennas on top
and bottom of the fuselage. Since UAT is a line-of-sight system, the antenna must have an unobstructed
view of the target. Any "shadowing" or signal shading from the aircraft will degrade the performance.
Shadowing may be from vertical stabilizers, wings, other antennas, engines, propellers, or the fuselage
itself. Proper antenna location and installation is very important for the reception of the signals. See the
UAT Antenna Installation Instructions, P/N 560-0215, for complete details.
Operating the GDL 90 with no RF terminations on the Top or Bottom UAT Antenna
ports can result in equipment damage. Always operate the GDL 90 with the Top and
Bottom UAT Antenna ports terminated with a VSWR ratio of 3.0:1 or less.
2.7 E
LECTRICAL
The GDL 90 installation kit includes three D-sub connectors and three coax connectors. The connector
layouts are shown in Figure 2-8. The D-sub connectors use the supplied crimp contacts as specified in
Table 2-2. Make the crimp connections with the crimp tool
Ref. Description
P1 I/O
P2 I/O
n/a Maint. Port
P3 GPS antenna
P4 UAT ant (top)
P5 UAT ant (bot)
The following table shows the specifications for the crimp contacts. Alternate crimp contact part numbers
may be used that are equivalent to those specified in the table below.
2-10
C
ONNECTIONS
Table 2-2. Interface Connectors
Connector
P/N Description
162-1575 15 Pin D-Sub Receptacle
162-1577 37 Pin D-Sub Receptacle
162-1574 9 Pin D-Sub Receptacle
162-0043 Coax connector, right angle
162-0043 Coax connector, right angle
162-0043 Coax connector, right angle
Table 2-3. Crimp Contact Specifications
Garmin AT Part Number
Description
Color bands
ITT/Cannon P/N
Military number
560-1049-00 Rev B
CAUTION
specified.
Crimp Contact
P/N
245-0027
245-0027
245-0027
N/A
N/A
N/A
245-0027
20-24 AWG crimp socket contact
Orange/Blue/Gray
031-1007-042
M39029/63-368
Description
20-24 AWG socket contact
20-24 AWG socket contact
20-24 AWG socket contact
N/A
N/A
N/A
GDL 90 Installation Manual