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DVB-S2 Configuration and Settings
R&S
®
SMCVB-K168
14
User Manual 1179.1064.02 ─ 03
Example: Annex
M with 3 time slices
Time slice #1: TSN
1, data symbols from FEC encoding
Time slice #2: TSN
2, PRBS data symbols
Time slice #3: TSN
3, PRBS data symbols
Time slice #4: TSN
1, data symbols from FEC encoding .... (next time slice cycle)
Figure 3-4: Annex M time slicing (timing diagram)
"On"
Time-slicing can be activated and more modulation coding settings
can be signaled.
"Off"
No time-slicing.
Remote command:
S2-X
Enables S2-X features.
For DVB-S2-X, additional modulation coding settings are defined to obtain a finer SNR
granularity compared to classical S2 modulation coding:
●
Clear sky conditions (e.g. 256
APSK)
●
Linear channel models (marked with"-L")
●
Very low SNR conditions (VL-SNR)
●
...
Related to a DVB-S2-X modulation coding setting is a corresponding LDPC code rate
and a FEC frame type. If the order of the modulation coding is higher than QPSK, a bit
interleaver pattern is related to this modulation coding setting.
Note:
VL-SNR modulation coding, super frame and channel bonding are released in a
later version.
Remote command:
General Settings