DekTec DTC-300 StreamXpress - Manual (Page 34)

DTC-300-SP – StreamXpress
USER MANUAL
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#7 In-depth inner interleaver (S27):
DVB-H offers the possibility in 2K and 8K mode to change the interleaver from native interleaver to
in-depth interleaver. Native interleaver interleave the bits over one COFDM symbol as in-depth
interleaver interleave the bits over four OFDM symbols in 2K and two OFDM symbols in 4K.
NOTE: When using 8K mode, the S27 bit should be set to 0.
#8 Enable cell identifier, S40 to S47:
In DVB-H transmission, it is advantageous to know from which cell the signal is coming from to
allow switching between cells when receiving the signal on a mobile device. The StreamXpress can
set the TPS bits S40 to S47 as a cell identifier. To enable this setting, tick on the box.
#9 Cell identifier:
This field represents the cell identifier value that is written in the bit S40 to S47 of the TPS. The value
is from 0 to 65635
#10 Enable S48, S49:
In DVB-H transmission, you can set a flag in the TPS for Time Slicing and FEC on the MPE sections.
The StreamXpress can set the TPS bits S48 and S49 of the TPS. To enable this setting, tick on the
box.
#11 Time Slicing S48:
To save power on the receiver the modulator can use time slicing which allow turning on and off the
receiver at a specific time. When that method is used, S48 is set to flag the receiver that the Time
Slicing method is in use in at least one Elementary Stream..
#12 MPE-FEC S49:
As part of the DVB-H modulation, standard OFDM FEC is applied. As mobile reception can be
difficult at some location, the user has an option to protect the MPE section of the MPEG-2 TS
containing the video and audio stream by applying FEC on the MPE sections. When the FEC is
applied on the MPE sections, S49 is set to flag the receiver that MPE-FEC is in use in at least one
elementary stream.
NOTE: In this section, the StreamXpress is just setting the bits for the TPS header but the modulator
doesn’t actually do time slicing or calculate and insert MPE-FEC.
3.5.9 DVB-T Modulation settings
The user can select the DVB-T modulation and change its parameters. Every UHF/VHF DekTec
modulator is licensed to support DVB-T by default. DVB-T is the standard used for Terrestrial
broadcast where DVB has been adopted.
Variable Type Description Details Diag