DekTec DTC-300 StreamXpress - Manual (Page 61)

DTC-300-SP – StreamXpress
USER MANUAL
61
The StreamXpress supports for 8PSK the following code rate:
3/5, 2/3, ¾, 5/6, 9/10, 8/9.
#3 Pilots:
Pilots are symbols that are inserted at regular interval in order to aid in carrier synchronisation. They
are used in for example at low FEC rate because DVB-S2 is able to work then at such low carrier-to-
noise levels that the receiver might have difficulties in maintaining synchronisation. The
StreamXpress has the option to turn the pilots on or off.
#4 FEC frame length:
DVB-S2 offers 2 FEC frame length: Long (or normal) FEC frame or Short FEC frames. Long FEC
frames are 64 800 bits and Short FEC frames are 16 200 bits. The StreamXpress support Short and
Long (Normal) FEC frames.
3.5.18 ISDB-S modulation settings
The user can select the ISDB-S modulation and change its parameters if a DekTec satellite card is
detected and licensed for ISDB-S .ISDB-S has been adopted by Japan and some South American
countries for satellite transmission.
ISDB-S do not use standard transport streams but uses a “super transport stream” structure
composed of the Main signal, which consists of multiple MPEG-TS, carries the program contents
and the TMCC signal, which informs the receiver of the modulation schemes applied, the identity of
MPEG-TS, etc.
The StreamXpress can playout existing ISDB-S files and DekTec offers a command line utility to
create the ISDB-S files.
The ISDB-S utility can be found in the same directory where the StreamXpress is installed and is
called IsdbsMux.exe
If the DekTec card is enabled for ISDB-S, use the isdbsMux application to create a valid ISDB-S file in
a DOS prompt environment.
Below includes the syntax to create a valid ISDB-S file.
usage: IsdbsMux [options] infile1 infile2...
'infile1' is an MPEG2 transport stream (188 byte packets)
Bitrate should correspond with the used modulation type
For example: 8PSK2/3 : 52.17 Mbps, BPSK1/2 : 13.04 Mbps
'outfile' is the output TS file (204 byte packets)
options:
-o outfile : set the output file name