Dvb-C - Alcad 918 Serie Manuel D'utilisation

The concatenation Viterbi + Reed Solomon of the correction of DVB-T/H has been replaced by the
concatenation LDPC + BCH under DVB-T2.
Display of the type of Modulation detected:
•
number of carriers (32 K)
•
constellation (256QAM R)
•
guard interval (1/8)
•
Viterbi rate (3/5)
Display of the values of Network_ID, System_ID, Cell_ID from the diffuser and specific to the emitter.

11.10 DVB-C

TUNER
Display of the measures of:
•
BERo: error rate before Reed Solomon
•
error rate after Reed Solomon (error rate packet)
PER:
•
MER: modulation error rate
•
LKM: Noise margin (Link Margin)
•
error rate 'bits'
BERo:
Ratio between the number of false bits / number of transmitted bits during the
measurement time
55
REED
DEMODULATOR
SOLOMON
BERo
DECODING
MPEG
PER