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USER'S MANUAL. TV EXPLORER HD +
Figure 35.- DVB-T2 (COFDM) signals CBER measurement screen.
In a digital reception system (DVB-T2), after the COFDM decoder other two
different correction methods are applied (see following Figure). In this case, as the
previous one, each time we apply an error corrector to a digital signal, the error rate
changes, therefore if we measure, for example, the error rate at the output of the
COFDM demodulator, at the output of the Low Density Parity Check (LDPC) decoder,
and at the output of the BCH decoder, we obtain nothing more than different error rates.
This is the reason because the BER measurement is provided after LDPC (LBER). It
also shows the LDPC iterations, which is the number ot times that the LDPC error
corrector goes through the signal.
Figure 36.- Digital reception system via terrestrial. (DVB-T2).
Figure 37.- DVB-T2 (COFDM) signals LBER measurement screen.
12/2011
COFDM
DEMOD.
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