Installation Procedures
2-10
560-1049-02 Rev. B
GDL 90 Installation Manual
0.125
Insulation
1.000
STEP 1
Cable
Shrink
Tube
Matching Ring
Cap
STEP 3
STEP 4
-Slide shrink tube over cable.
-Strip cable as shown.
Solder Center
Conductor
-Solder cap into place, 2 Places.
-Shrink tube as shown.
Solder Cap
2 Places
STEP 2
.125
Shield 0.250
-Flare Outer Shield as Shown
Solder Outer Shield
to Connector
-Place cable in connector as shown placing inner
shield inside connector.
-Flatten outer shield against connector.
-Solder outer shield to connector.
-Solder center conductor
-Slide matching ring into connector and around
conductor.
-Attach cap.
Figure 2-7. Right Angle Coax Connector Assembly
2.6.2 UAT
Antennas
The UAT antenna is a standard 50Ω vertically polarized L-band antenna that operates at 978 MHz. Any
antenna meeting the requirements of TSO-C66, C74, C112 or C154 and presenting a VSWR of less than
1.7:1 at 978 MHz is acceptable. Garmin AT Model A-40 and A-41 antennas meet these requirements,
and are suitable for use in both fixed-wing aircraft and rotorcraft. UAT antennas must be mounted more
than 0.5 meters from any FADEC (Full Authority Digital Engine Control). Follow the manufacturer’s
instructions for installing the antennas.
The GDL 90 receives UAT signals from two antennas, on the top and bottom of the fuselage. Because
UAT signals propagate by line-of-sight, simultaneous shadowing of the antennas should be avoided.
Shadowing may be from vertical stabilizers or wings, other antennas, engines, propellers, or the fuselage
itself. Selection of appropriate antenna locations is critical to the proper performance of the GDL 90.
CAUTION
Operating the GDL 90 without 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.
Содержание GDL 90
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Страница 8: ...Table of Contents vi 560 1049 02 Rev B GDL 90 Installation Manual Notes ...
Страница 42: ...Installation Procedures 2 24 560 1049 02 Rev B GDL 90 Installation Manual Figure 2 11 GDL 90 Center of Gravity ...
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Страница 48: ...Limitations 560 1049 02 Rev B GDL 90 Installation Manual 3 4 Notes ...
Страница 62: ...Post Installation Configuration and Checkout 560 1049 02 Rev B GDL 90 Installation Manual 4 14 Notes ...
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