DekTec DTC-300 StreamXpress User Manual
Page 30
DTC-300-SP – StreamXpress
USER MANUAL
30
Variable
Type
Description
Details Diag
Bandwidth
Selection
Drop
down
Select the bandwidth of the modulated channel
#1
1
IL1, lL2
Drop
down
Allow to the set the time interleaver.
#2
2
Constellation
Mode
Drop
down
Select to Constellation mode used for the modulation
#3
3
Guard
interval
Drop
down
Select to guard interval used for the modulation
#4
4
Code Rate
Drop
down
Select to code rate used for the modulation
#5
5
F
Check
box
Select frame numbering
#6
6
#1 Bandwidth Selection:
The DMB-T/H modulation supports multiple bandwidth per channel. With this setting the user can
select between 5,6,7,8 MHz for the RF spectrum per channel.
#2 Time Interleaver:
The DMB-T/H modulation supports 2 types of interleavers setting: Short 240 symbols (IL1) or long
720 symbols (IL2).
#3 Constellation Modes:
The DMB-T/H modulation supports multiple sub-modulation modes. Depending on the application
and how error prone the channel is, the user can select different constellation mode. The
StreamXpress supports 4NR-QAM, 4-QAM, 16-QAM, 32-QAM and 64-QAM.
#4 Guard Interval:
The DMB-T/H modulation uses Pseudo-Random Noise Code in the guard interval to allow for faster
synchronisation and more accurate channel estimation. StreamXpress offers 3 different codes:
PN420, PN595 and PN945.
3
1
2
4
5
6