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11.11 DVB-S2 / S2X
TUNER
Display of the measures of:
•
BERi :
error rate before LDPC
•
BERo :
error rate after LDPC
•
PER :
error rate after BCH (lost packets)
•
MER :
modulation error rate
•
LKM :
Noise margin (Link Margin)
Recall:
LDPC: Low Density Parity Check
BCH: Bose Chauhuri Houquenohem
The concatenation Viterbi + Reed Solomon of the correction of DVB-S has been replaced by the concatena-
tion LDPC + BCH under DVB-S2.
The standard DVB-S2 has an extension: DVB-S2X with more modulations, roll-off, ... (EN 302307 part 2)
If the option is present, the device will automatically detect this extension.
DEMODULATEUR
LDPC
BERo
BERi
p.
DECODAGE
BCH
MPEG
PER
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