Satellite Service; Figure 54 Inmarsat C Satellite Coverage - Cortalk RMU5 Generic Installation And Configuration Manual

6.1.10.3 Satellite Service

The RMU5 with Easytrack communicates over a geostationary satellite system. The RMU5 must be configured with
two pieces of information to allow this mode of operation to work correctly.
The Easytrack system uses Inmarsat C satellites which are currently divided into 4 different ocean region service areas.
These are Pacific Ocean Region (POR, 178°E), Atlantic Ocean Region West (AORW, 53°W), Atlantic Ocean Region
East (AORE, 15.5°W), and Indian Ocean Region (IOR, 64°E). Since the satellites are geostationary, care must be taken
during installation of the Easytrack transceiver to ensure that an open sky view is available to the selected satellite. The
Easytrack should be mounted flat, or slightly inclined to the south for northern hemisphere installations. The Easytrack
should be mounted flat, or slightly inclined to the north for southern hemisphere installations. The ocean region selected
in the RMU5 parameters must match the location of installation for the RMU5. Figure 54 shows the coverage attained
by each of the 4 satellites. Choose the satellite which is closest to the installation area unless there are obstructions, such
as trees or mountains, in line-of-sight view for that satellite. If obstructions are present, an alternative satellite may have
to be used if it provides clearer line-of-sight.

Figure 54 Inmarsat C Satellite Coverage

Example of satellite selection:
West Coast Canada/USA installation – choose POR satellite by default.
Central/Eastern Canada/USA installation – choose AORW satellite by default.
Africa/Europe installation – choose AORE satellite by default.
Western/Central Asia installation – choose IOR satellite by default.
Eastern Asia/Australia installation – choose POR satellite by default.
The second piece of configuration information required is the MUX2 subaddress. The Mobiltex MUX2 device allows
multiple RMU5 devices to share a single Easytrack transceiver. Each RMU5 attached to the MUX2 must be given a
unique subaddress in the grouping. If a MUX2 is not being used, set this parameter to a value of 1 in the RMU5
configuration.
The "Status" button in the RMU5Setup Radio Communications grouping can be used to determine the status of the
satellite transceiver connection to the satellite. Click this button to bring up the following dialog.
MOBILTEX® DATA LTD.
Calgary, Alberta
TITLE:
RMU5 Generic Installation and Configuration Guide
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RMU5-MAN-001
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