ETTC'2003 - SEE

4.2 COMPONENT DEGRADATION MEASUREMENT
Another application of the bench is to test specific
component such as filters, LNB, TWTA, etc.
As example, the figure shows the performance
and degradation due to specific payload filtering.
In this example, the filter used doesn't introduce
significant degradation and it could be possible to
relax its specifications (in line with the link
budget losses associated with this filter).
As the input/output of each rack is standardised, it
is very easy to integrate and test commercial
equipment as well as breadboards or engineering
models.
5 CONCLUSION
1,00E-02
1,00E-03
1,00E-04
1,00E-05
1,00E-06
1,00E-07
1,00E-08
1,00E-09
1,00E-10
Simulation SPW
3,2 3,3 3,4 3,5 3,6 3,7 3,8 3,9 4 4,1
Within the framework of ATF project, CNES is developing a bench called BST to study transmission
satellite systems as well as degradation due to specific element of the transmission chain. This bench is
principally devoted to the analysis of multimedia satellite systems and it could represent up to fifteen
interferers taking into account adjacent and co-frequency beams. Specific components have been
developed which are now available and could serve for many applications even in non-satellite systems.
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