User's Manual
Table Of Contents
- Cover
- 1-Welcome Letter
- 2-Table of Contents
- 3-Contacts
- 4-Quick Start Guide Rev 2
- 5-SIM Registration
- 6-Installation and Operations Rev 2
- 7-Component Maintenance Manual Rev 1
- SERVICE BULLETIN LIST
- RECORD OF CHANGES
- RECORD OF REVISIONS
- LIST OF EFFECTIVE PAGES
- LIST OF EFFECTIVE PAGES
- INTRODUCTION
- DESCRIPTION AND OPERATION
- TESTING AND TROUBLESHOOTING
- DISASSEMBLY
- CLEANING
- CHECK
- REPAIR
- ASSEMBLY
- FITS AND CLEARANCES
- SPECIAL TOOLS, FIXTURES AND EQUIPMENT
- ILLUSTRATED PARTS LIST
Airbus Iridium SATCOM System
165E5733-00 L-3 Aviation Recorders Proprietary
Issue, Rev. 02
21 January 2014
Page 37
4.2 SDU Configuration Module (SCM)
The SCM can be mounted on or near the SDU tray within 24 inches of the SDU rear connector. The
SCM should be electrically bonded to the airframe (<20 milliohms). It is recommended that the SCM
be located to provide easy access to the cover if ever the SIM card requires replacement. Refer to
Figure 3-4 for the SCM mounting footprint.
4.3 Iridium Antenna System
The Airbus Iridium SATCOM System has a single combined Iridium/GPS RF connection on the rear
interface connector, which is to be connected to a single combined Iridium/GPS Antenna. The
antenna system is comprised of all the components from the rear interface connector up to and
including the antenna. The total gain of the antenna system must be greater than 0 dB at 1626.5 MHz
(measured at the antenna zenith).
Most Iridium antennas have a gain of +3 dBic at the zenith; therefore the maximum attenuation in the
rest of the antenna system must be less than 3 dB. If an antenna with a different gain is selected, the
maximum loss of the rest of the antenna system must be adjusted accordingly.
4.3.1 Antenna
Iridium SATCOM System Antenna: This is a passive antenna designed to cover the frequency range
from 1565 MHz to 1626.5 MHz for Iridium transmit / receive operations and GPS reception. It is a
low-profile, circular device that can be mounted directly to the aircraft fuselage. This antenna
connects to the Iridium SDU through a coaxial cable – see
Figure 3-8 Figure 3-7.
The antenna specifications are listed below:
Weight
(Typical)
0.170 kg (6 oz.)
Overall Dimensions
(Typical)
Height: 16.8 mm (0.66 inches)
Diameter: 89 mm (3.5 inches)
Manufacturer’s Specification Reference Number
Drawing 009E5733-00, Revision – Iridium Antenna – Passive, 1565 – 1626.5 MHz,
RHCP – see Figure 4-2.
Iridium SATCOM System Supplier Equipment Specification,
Document No. 905-E5750-07, Revision –
Environmental Specifications
The Iridium SATCOM System antenna meets the environmental requirements of RTCA DO-
262A where applicable as referenced in Document No. 905-E5809-42, Revision A.