p.
55
11.8 DVB-C
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)
BERo
:
error rate ‘bits’
Ratio between the number of false bits / number of transmitted bits during the measurement time
PER
:
error rate ‘packets’
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).
TUNER
DEMODULATEUR
REED
SOLOMON
DECODAGE
MPEG
BERo
PER
Summary of Contents for MCT 049B
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