Справочник Пользователя для EMS Technologies Canada Ltd. HSD-X
Page 2–3
18 September 2007
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion™ HSD-128 High-speed Data Terminal
(1) Swift64 Service Categories
Inmarsat has restricted the frequencies assigned to the HSD system eliminating the
possibility of intermodulation signals occurring, thus avoiding any resulting
interference problems with the GPS band signals.
possibility of intermodulation signals occurring, thus avoiding any resulting
interference problems with the GPS band signals.
Inmarsat split the band of frequencies assigned to Swift64 High-Speed Data into two
separate categories: Category A and Category B. Category B frequencies are
restricted to those frequencies that do not overlap with AERO-H frequency allocations.
HSD transceivers in Cooperative and Combined Mode installations must be
registered as Category B systems. HSD transceivers in Stand-Alone and Selective
installations do not require restricted frequency allocations. Register Stand-Alone
HSD transceivers, Multi-Channel, and Selective Mode systems as Category A
systems.
separate categories: Category A and Category B. Category B frequencies are
restricted to those frequencies that do not overlap with AERO-H frequency allocations.
HSD transceivers in Cooperative and Combined Mode installations must be
registered as Category B systems. HSD transceivers in Stand-Alone and Selective
installations do not require restricted frequency allocations. Register Stand-Alone
HSD transceivers, Multi-Channel, and Selective Mode systems as Category A
systems.
The frequencies assigned to 4.8 kbps Low-Speed Voice (LSV) are not within the
managed Category B frequency range. Therefore, LSV is not a service supported by
Inmarsat in Cooperative and Combined Mode HSD transceivers.
managed Category B frequency range. Therefore, LSV is not a service supported by
Inmarsat in Cooperative and Combined Mode HSD transceivers.
Secure communications in Category B, HSD systems do not have access to Mini-M
service. However, HSD transceivers have both c8400 or c21000 M4 circuit-switched
mode channels, which support secure communication operations.
service. However, HSD transceivers have both c8400 or c21000 M4 circuit-switched
mode channels, which support secure communication operations.
To ensure the correct Category frequency assignments for HSD systems, different
terminal type numbers are assigned to HSD transceivers based on their intended
installation configuration.
terminal type numbers are assigned to HSD transceivers based on their intended
installation configuration.
Table 2–1 lists the terminal type, frequency category, and supported service types for
all types of HSD transceivers installations.
all types of HSD transceivers installations.
Note:
Category B, Inmarsat terminals do not support Mini-M Voice (4.8 kbps LSV).
Selective Mode is a non-standard installation and it is not a recommended
mode of operation. Selective Mode has been superseded by Combined Mode
operation for MCS series SATCOM and with Cooperative Mode operation for
Selective Mode is a non-standard installation and it is not a recommended
mode of operation. Selective Mode has been superseded by Combined Mode
operation for MCS series SATCOM and with Cooperative Mode operation for
Table 2–1. Swift64 Category and Service Matrix
HSD
Installation
Mode
Inmarsat
Frequency
Category
Terminal
Type
64 kbps
speech
3.1
KHz
audio
56
kbps
data
64
kbps
UDI
Mini-M
Voice
MPDS
Stand-Alone
and
Multi-Channel
(HSD and
HSD-X)
and
Multi-Channel
(HSD and
HSD-X)
Category A 76ES03 X
X
X
X
X
X
Collins
Cooperative
Cooperative
Category B 76ES04 X
X
X
X
N/A
X
Honeywell
Combined
Combined
Category B 76ES05 X
X
X
X
N/A
X
Selective
Mode (
Mode (
Not
Rec’d)
Category A 76ES03 X
X
X
X
X
X