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Appendix - Overview of the Used Technologies
MDM9000 Satellite Modem
18.1.3 S2 Extensions
S2 Extensions is Newtec4s proprietary modulation technology. The S2 Extensions modulation
technology combined with Clean Channel Technology delivers gains up to 37% compared to
standard DVB-S2 modulation.
The main features of the S2 Extensions technology are:
• Finer MODCOD granularity: There are 87 MODCODs (compared to the 28 MODCODs in
DVB-S2).
• Better MODCOD performance: FEC codes and modulations have been redesigned in order to
improve the performance of the existing DVB-S2 MODCODs.
• Optimization for linear and non-linear satellite links: Two sets of MODCODs are available:
– One set of MODCODs is optimized for multi-carrier operation of the transponder (linear
channel operation). In multi-carrier operation, the transponder can not be saturated and a
given back-off is needed to avoid intermodulation between the individual carriers in the
transponder.
– The second set of MODCODs is optimized for single carrier operation which allows to
saturated the transponder (non-linear channel).
The following figure shows the efficiency of the DVB-S2X standard compared to Newtec's
proprietary S2 Extensions and to the DVB-S2 standard.
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