FIELD METERS MCT 080 / 081 / 082 / 085 USER MANUAL
p.
59
10.9 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
measurement time
Recall: under DVB-C, a packet is made of 188 bytes; a packet is "false" if it includes more than 8 wrong
bytes (correction by Reed Solomon coding).
TUNER
DEMODULATOR
REED
SOLOMON
DECODING
MPEG
BERo
PER
Constellation