Dvb-S/S2 Signals - Promax TV EXPLORER HD+ Manual De Instrucciones

L1-POST Fixed Signaling
The demodulator has been able to decode the signaling information L1-Post.
MPEG-2 TS DVB-T2
Correct detection of the DVB-T2 signal, at the demodulator output a TS MPEG-2 is
delivered.
5.14.7.4

DVB-S/S2 signals

Once determined the parameters of QPSK signal, it will be possible to measure
BER. Following is shown the BER measurement before the error corrections: BER
before the FEC: CBER.
Figure 38.- DVB-S (QPSK) signals CBER measurement screen.
In a digital reception system for satellite signals (DVB-S), after the QPSK decoder
two different correction methods are applied (see following Figure). Obviously, each time
we apply an error corrector to a digital signal, the error rate changes, therefore if we
measure in a digital satellite television system, for example, the error rate at the output of
the QPSK demodulator, at the output of the Viterbi decoder, and at the output of the
Reed-Solomon decoder, we obtain nothing more than different error rates. This is the
reason because the BER measurement is provided before FEC, after Viterbi (VBER).
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Figure 39.- Digital reception system via satellite. (DVB-S)
USER'S MANUAL. TV EXPLORER HD+
11/2013