DekTec DTC-300 StreamXpress - Manual (Page 27)

DTC-300-SP – StreamXpress
USER MANUAL
27
#1 Bandwidth Selection:
The ADTB-T modulation supports multiple bandwidths 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 ADTB-T modulation supports 2 time interleaver setting. Short 240 symbols (IL1) or long 720
symbols (IL2).
#3 Constellation Modes:
The ADTB-T modulation supports multiple sub-modulation modes. Depending on the application
and how error prone the channel can be 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 ADTB-T modulation uses Pseudo-Random Noise Code in the guard interval to allow for faster
synchronisation and more accurate channel estimation. The StreamXpress offers 3 different codes:
PN420, PN595 and PN945.
#5 Code Rate:
The ADTB-T modulation offers multi Code rate. The StreamXpress support 0.4, 0.6 and 0.8 code
rate.
#6 Frame Numbering
Each ADTB-T RF frame is sequentially numbered for missing frame and reordering tracking. When
selecting the “F: box, the StreamXpress will sequence the RF frames.
#7 Pilot Insertion
The insertion of the Pilot in ADTB-T is optional and allows a quicker locking of the RF signal by the
receiver. Select the “P” box for Pilot insertion.
3.5.3 ATSC Modulation settings
The user can select the ATSC modulation and change its parameters. Every UHF/VHF DekTec
modulator is licensed to support ATSC by default.
Variable Type Description Details Diag