
USER’S MANUAL.
TV EXPLORER
HD
ISDB-T/T
B
11/2010
Page
49
En
g
lis
h
Satellite band - Analogue channels
Level
Level measurement of the currently tuned carrier.
C/N
Ratio between the modulated signal level the equivalent noise
power for a same bandwidth.
Satellite band - Digital channels (DVB-S/S2/DSS)
:
Channel Power
Channel power is measured assuming that power spectral
density is uniform throughout channel bandwidth.
To measure it correctly it is indispensable to define the
Channel BW
.
C/N
Ratio between the modulated signal power and the equivalent
noise power for a same bandwidth.
MER
Modulation Error Ratio. Complementary measurement of the
Noise Margin for
DVB-S
and
DSS
and Link Margin for
DVB-S2
.
CBER
The
BER
measurement (Bit error rate) for the digital signal
before error correction (
BER before FEC
).
VBER
(Only for
DVB-S
and
DSS
) The
BER
measurement (Bit error
rate) for the digital signal after error correction (
BER after
Viterbi
).
LBER
(Only for
DVB-S2
) The
BER
measurement (Bit error rate) for the
digital signal after error correction (
BER after LDPC
).
In order to change the measurement highlighted, press the
[12] key. On the
monitor will appear cyclically all the measures available for the signal on tune.
5.14.1 Analogue TV: Measuring the Video Carrier Level
In the measurement mode of analogue signals, the
TV EXPLORER
HD
ISDB-T/T
B
,
monitor can work as an analogue indicator of level representing the signal
present in the input.
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