Scenario 3: Ku-Band 5 Stations Star Network With 3 Hubs - ND SatCom SKYWAN IDU 7000 Manual

Outdoor Unit and Satellite Link Design
Link Budget Examples
3.6.3

Scenario 3: Ku-Band 5 Stations Star Network with 3 Hubs

Finally we consider a slightly different scenario by assuming that now the station in Rome
should also operate as a hub station for the network. Therefore, the home channel for Rome is
changed to carrier 1.
For the calculation of this network the link filter matrix is used: Network topology on carrier 2 is
set to "Meshed in ULA1" but the calculation of the satellite link loops for Casablanca and Tunis
as well as the links between these two stations are suppressed by entering "0" for these links
in the link filter matrix (cf. corresponding picture in chapter 3.6).
If all other network parameters are unchanged, the link budget calculation result is similar to
the scenario 2 with 2 hub stations. The only difference is that now in Casablanca also a 30 W
amplifier is needed, due to the higher rain margin required for the downlink to the hub in Rome,
which is located in rain zone K.
106 Network Design and Engineering Guide 2010-10-26