Satellite Data Worksheets (Ku- And C-Band); Figure 3-11 Link Budget Tool - Satellite Data Worksheet(S) - ND SatCom SKYWAN IDU 7000 Manual

Outdoor Unit and Satellite Link Design
®
SkyWAN Link Budget Calculation Tool
3.5.1

Satellite Data Worksheets (Ku- and C-Band)

The tool contains a satellite data sheets for defining C-Band and Ku-Band transponder.
Figure 3-11 Link Budget Tool - Satellite Data Worksheet(s)
For C-Band transponders the link polarization (circular/linear/unknown) must be specified,
whereas the for Ku-Band linear polarization is assumed. The intermodulation parameters I0 up/
down allow to specify signal degradation due to intermodulation on the up- and downlink. The
default settings -300/-200 dBW/Hz describe a situation without intermodulation effects. If no
detailed information about transponder intermodulation is available a typical way to estimate
this effect is:
- Increase I0 up until the power requirement for the earth stations is increased by 20%.
- Increase I0 down until the power requirement for the earth stations is increased by addi-
tional 5%.
From the transponder data saturation, G/T, SFD, Input Back-Off and Output Back-Off the sat-
ellite gain is calculated. Note that these values refer to the center of the satellite beam. The
transponder bandwidth is needed to calculate the PEB.
86 Network Design and Engineering Guide 2010-10-26