ND SatCom SKYWAN IDU 7000, Manual

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2010-10-26 Network Design and Engineering Guide 93
Outdoor Unit and Satellite Link Design
SkyWAN
®
Link Budget Calculation Tool
figure 3-18.
Step (5) The link calculation is triggered by pressing Ctrl-e or using the button on the upper
left corner of the Summary sheet.
Output
The main output section consists of 2 parts:
Figure 3-19 Link Budget Tool - Summary Worksheet Uplink
The first part calculates power requirements for all stations to a specific downlink which can be
defined by the ’Selected Downlink Location’ input box. No input means that the power require-
ment for a station loop is calculated. The last line states the required amplifier power including
the station output back-off.
Figure 3-20 Link Budget Tool - Summary Worksheet Downlinks
The second part represents the power requirement considering all downlinks to reachable sta-
tions. For fully meshed stations this includes all stations in the network; for remote terminals in
star networks only the downlinks to the two hub stations are considered. Here the ’Power all
links and channels’ output represents the required amplifier power including output back-off.
The ’ODU all links’ output field proposes the amplifier power class according to the definitions