Promax TV EXPLORER HD ISDB-T/T B Manual De Instrucciones página 177

USER'S MANUAL TV EXPLORER
Figure 35.- ISDB-T/T
In a reception system of terrestrial digital signal, after the COFDM decoder two
error correction methods are applied. Obviously, each time we apply an error corrector to
the digital signal, the error rate changes, therefore if we measure the error rate at the
output of the COFDM 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. The
TV EXPLORER HD ISDB-T/T
TUNER A/D
Figure 37.- ISDB-T/T
10/2012
HD ISDB-T/T
B
(COFDM) signals CBER measurement screen.
B
provides the BER after Viterbi (VBER).
B
BER before FEC,
MER
COFDM
DEMOD.
Figure 36.- COFDM reception system.
(COFDM) signals VBER measurement screen.
B
BER after Viterbi
VITERBI RED-SOLOMON
Page 61