Skywan; Link Budget Calculation Tool - ND SatCom SKYWAN IDU 7000 Manual

If it is not feasible to equip every station using a specific carrier for transmission with an outdoor
unit which produces a sufficient large EIRP to reach the maximum IPFD on the satellite, the
satellite transponder will also transmit this carrier with an EIRP which is lower than the satellite
EIRP . In this case the reachable Eb/No will also be smaller and therefore the modulation
max
and coding of that carrier has to be adjusted accordingly.
3.5

SkyWAN

To simplify link budget calculations for SkyWAN
sheet which contains the necessary formulas to calculate power requirements for earth stations
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in SkyWAN networks.
The ND Satcom SkyWAN
- Support of C-Band and Ku-Band satellite links.
- Data for up to 23 networks may be entered.
- Data of up to 20 earth stations may be defined per network.
- Support of meshed, star and hybrid network topologies.
- Up to 4 satellite transponder data sets may be used for each network.
Result: Power requirement for every SkyWAN
The link budget tool is a Microsoft
sheets:
- Summary: Input: Carrier parameters for up to 8 SkyWAN
level and rain availability. Output: Earth station power requirements, power equivalent
bandwidth.
- Stations: Earth station data, link to satellite transponder used for the network.
- Link Data: Intermediary results for link budget calculations like e.g. path loss, rain fade etc.
- Local_Ku_Antdata: Antenna data for antennas used in Ku-Band.
- Local_C_Antdata: Antenna data for antennas used in C-Band.
- Ku_Satellites: Satellite transponder data for Ku-Band transponders.
- C_Satellite: Satellite transponder data for C-Band transponders.
- TxAmp: Available amplifier power classes for Ku and C-Band.
In the following pages the various input and output fields of the link budget tool are explained.
Note that the input cells are indicated by a dark grey background. Cells with a different back-
ground color are output fields which should NEVER be overwritten by user input to avoid any
damage to the workbook's built-in formulas. If an input field requires a numerical input, only the
value but not the unit should be entered.
Example: Saturation EIRP for the satellite transponder: Enter "37" not "37 dBW".
2010-10-26
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Link Budget Calculation Tool

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Link Budget Tool offers the following functionalities:
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Excel spreadsheet which consists of the following work
Network Design and Engineering Guide
Outdoor Unit and Satellite Link Design
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SkyWAN
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networks, ND Satcom provides a spread-
earth station in the network.
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carriers, required bit error rate
Link Budget Calculation Tool
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