Newtec M6100 - Modulation and Coding; Pilots

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Features Descriptions M6100 Broadcast Satellite Modulator
12.1.16.2 Modulation and Coding
Define the ModCod that can be used.
Newtec provides a tool (the DVB-S2 calculator) which calculates, in function of the chosen ModCod
and other system parameters, the required Es/N0 for your application.
All available ModCods are listed in: DVB-S2onpage217 and
MODCODDefinitionsS2-Extensions.onpage219
Refer to (http://www.newtec.eu/library/dvb-s2-calculator/ ) to download the DVB-S2
calculator.
12.1.16.3 Pilots
M6100>Modulator >> Pilots
Define if it is needed to insert pilots or not.
This option is only available in the DVB-S2 standard.
In DVB-S2 Extensions Pilots are mandatory.
What are Pilots?
Pilots are unmodulated symbols grouped in blocks that are added on the physical layer framing
level.
Why are Pilots used in DVB-S2?
• Use Pilots to increase the reliability of the receiver synchronization. (Increasing the performance
and robustness of the demodulator.)
• Pilots reduce the influence of phase noise in the system;
Typically the LNB on the receiving side is the main source of phase noise.
Note: that pilots add about 2% of overhead.