USER’S MANUAL. TV EXPLORER II/II+
Page 46
12/2013
Terrestrial band - Digital channels
(DVB-C
and
DVB-T/H)
:
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
Out-channel measurement. Noise level is measured at
fnoise=
ftuning
±
½*Channel BW
. To measure it correctly digital channel
must be tuned at its central frequency.
MER
Modulation error ratio with noise margin indication.
CBER BER
measurement (Bit error rate) for the digital signal before
error correction (
BER before FEC
).
VBER BER
measurement (Bit error rate) for the digital signal after error
correction (
BER after Viterbi
).
Satellite band - Analogue channels
Level
Level measurement of the currently tuned carrier.
C/N
Ratio between the modulated signal power and the equivalent
noise power for a same bandwidth.
Satellite band - Digital channels (DVB-S/S2)
:
Channel Power
Automatic method
.
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 the 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) 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.
