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11.8
DVB-C
TUNER
Display of the measures of:
BERo:
error rate before Reed Solomon
PER:
error rate after Reed Solomon (error rate packet)
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
error rate 'packets'
PER:
Ratio between the number of false packets / number of transmitted packets during the measure-
ment time
Recall: Under DVB-C, a packet is made of 204 bites; a packet is "false" if it includes more than 8 wrong oc-
tets (correction by Reed Solomon coding).
7849B – 7859B – 7817B
REED
DEMODULATEUR
SOLOMON
BERo
DECODAGE
MPEG
PER
p.
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