System overview
2-2
Chapter 2: Introduction
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Cobham Public
2.2
System overview
The purpose of the LGA-5005 is to provide an L-band radio link between the Inmarsat
SwiftBroadband Class 4 SATCOM system AVIATOR 200S and an Inmarsat I4 satellite. For
SwiftBroadband services, the LGA-5005 is part of a single channel aeronautical SATCOM
system comprising the following subsystems (as defined in ARINC 781-6, Attachment 7,
Configuration 3 [4]), interconnected as shown in Figure 2-2:.
• LGA-5005 HLD/Enhanced Low Gain Antenna (HELGA)
• SDU-5045 Compact Satellite Data Unit (CSDU)
• SCM-5055 CSDU Configuration Module (SCM)
Type
Number
Equipment Name
Abbreviated
Name
Certified
Part Number
a
a. Final PNR suffix vvccc: vv = customer specific, ccc = minor variants
OEM PNR
[for Cobham internal use only]
LGA-5005
HLD/Enhanced
Low Gain Antenna
HELGA
405005-vvccc
677-A0213
SCM-5055
Compact SDU
Configuration
Module
SCM
405055-vvccc
677-A0217
SDU-5045 Compact Satellite
Data Unit
CSDU
405045-vvccc
–
Table 2-2: Summary of system equipment