DekTec DTC-300 StreamXpress - Manual (Page 56)

DTC-300-SP – StreamXpress
USER MANUAL
56
#1 Number of Segments:
The ISDB-T segment offers 13 segments. These segments can be assigned to any of the 3 layers
when broadcasting in normal mode. This drop down allows assigning segment to each of the A, B,
and C layer.
#2 Modulation:
Depending on the application, a layer can use different modulation. The modulation modes
available are DQPSK, QPSK, 16QAM and 64QAM. Each layer can use a different modulation.
#3 Code rate:
Depending on the application, a layer can use different code rate. The code rates available are ½,
2/3, ¾, 5/6, 7/8. Each layer can use a different code rate.
#4 Time Intlv:
Time interleaver is unique to ISDB-T and is quite effective to improve both robustness against
impulse noise and performance for mobile/portable reception. The time interleaver depends on the
ISDB-T broadcast mode.
For mode 1, the settings are 0, 4,8,16.
For mode 2, the settings are 0,2,4,8.
For Mode 3, the settings are 0,1,2,4.
NOTE: It is recommended to use a middle value.
#5 Rate Bps:
The total transport rate available for broadcast in a layer depends on the number of segments
allocated, modulations parameters etc... This field displays the total available bitrate available for
the layer.
#6 Selected Bps:
This display represents the total bitrate for all the selected TS components in the Component section.
1
4
5
6
2
3
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