ND SatCom SKYWAN IDU 7000, Manual

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98 Network Design and Engineering Guide 2010-10-26
Outdoor Unit and Satellite Link Design
SkyWAN
®
Link Budget Calculation Tool
UpLink Area 2 (ULA2)
Finally the slave stations in ULA2 use carrier 2 for the primary reception channel. Any station
which wants to communicate directly to other ULA2 stations must also have a second reception
channel on carrier 4. In this example all the stations in America are equipped for this mesh com-
munication within ULA2.
Figure 3-28 MRB DUB Network - ULA2 Stations
Carrier Topology
The definition of the carrier parameter topology in the summary sheet has to be done in the
following way:
- Carrier 1: Mesh in ULA1
- Carrier 2: ULA2 -> ULA1 All
- Carrier 3: ULA1 All -> ULA2
- Carrier 4: ULA2 -> ULA2
Note that modem data rate, modulation and coding on carrier 1 and 2 must be identical. For
the other carriers these parameters can be set individually. The topology option ULA1Hub ->
ULA2 and ULA2 -> ULA1Hub can only be used if there is only one master station (no backup
master) in the network.
Figure 3-29 MRB DUB Network - Summary Topology