DekTec DTC-300 StreamXpress - Manual (Page 60)

DTC-300-SP – StreamXpress
USER MANUAL
60
Depending on the channel noise, the user can select the Inner code rate of the DVB-S modulation.
The StreamXpress supports all DVB-S code rate: ½, 2/3, ¾, 5/6, 7/8.
3.5.17 DVB-S2 modulation settings
The user can select the DVB-S2 modulation and change its parameters if a DekTec satellite card is
detected and licensed for DVB-S2. DVB-S2 is a second generation standard developed by the
European agency but is used worldwide for satellite transmission.
NOTE: DekTec adaptors do not support legacy DVB-DSNG 8PSK standard which has been replaced
by DVB-S2 standard.
Variable Type Description Details Diag
Modulation
Mode
Drop
down
Select the modulation mode. #1 1
Inner Code
Rate
Drop
down
Select the Inner Code Rate #2 2
Pilots Tick box Select whether pilots are in use #3 3
FEC frame
length
Drop
down
Select Short or Long FEC frames #4 4
#1 Modulation mode:
DVB-S2 supports 4 modulations modes QPSK, 8PSK, 16APSK and 32 APSK.
The StreamXpress currently supports QPSK and 8PSK. Please contact DekTec for availability of
16APSK and 32APSK modulator cards.
#2 Inner code rate:
Depending on the channel noise and the modulation, the user can select the Inner Code Rate of the
DVB-S2 modulation.
The StreamXpress supports for QPSK the following code rate:
¼, 1/3, 2/5, ½, 3/5, 2/3, ¾, 4/5, 5/6, 9/10, 8/9.
1
2
3
4