Page 4-11
28 Feb 2018
23-15-45
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
Aspire-200
© Honeywell International Inc. Do not copy without express permission of Honeywell.
offset to
correct beam steering. During the initial installation, set the pitch, roll, and
rotation offset angles to within ± 0.25° in the AMT-1800 IGA EEPROM—
MN-1242-70010 provides information about setting up the AMT-1800 IGA.
Refer
to the AMT-1800 IGA SDIM for more information on setting these values through
the Antenna interface
.
(5) Installing the Antenna Interface Adapter
The installer must follow proper avionics procedures both when sealing the
mounting adapter to the fuselage and when sealing the AMT-1800 IGA to the
mounting adapter to avoid trapping water and corrosion. Use approved avionics
sealants and corrosion inhibitors.
The AMT-1800 IGA has two weeping/venting locations on the underside of the
unit. These venting locations are sealed, and no special precautions are
required to seal the antenna. The base of the antenna (except the grounding
areas) is painted.
J.
AMT-3500 IGA
(1) Designing an Antenna Interface Adapter
Most installations require the fabrication of an antenna interface adapter to
adapt the flat base of the AMT-3500 IGA to the curved surface of the fuselage.
The AMT-3500 IGA has two weeping/venting locations on the underside of the
unit that must not be blocked. The mounting adapter must provide features to
allow the AMT-3500 IGA to properly vent (for pressure equalization) and weep
condensate. Refer to Figure 3-6 on page 3-11 for the location of these features.
The mounting adapter should not permit water/condensate to become
entrapped. Ensure sufficient drainage to avoid damage and corrosion.
Honeywell can provide installation kits for common airframes—contact
Honeywell for more information.
(2) Selecting a Location for the AMT-3500 IGA
For clear satellite communication, install the AMT-3500 IGA on the top of the
fuselage.
Select a location for the AMT-3500 IGA assembly that minimizes shadowing
from any part of the aircraft structure. The aircraft tail (on fixed wing platforms)
may cause a small amount of blockage. You can minimize this blockage by
installing the AMT-3500 IGA forward on the fuselage so that it has a clear view
in any direction from 5° to 90° in elevation and 360° in azimuth.
(3) Aligning the AMT-3500 IGA
Orientation of the AMT-3500 IGA is defined with respect to the principal axes
of the antenna. The principal axes are illustrated in Figure 3-6 on page 3-11.
The connector access cover on the radome is towards the aft of the aircraft. In
