DekTec DTC-300 StreamXpress User Manual

Page 54

DTC-300-SP – StreamXpress

USER MANUAL

Variable

Type

Description

Details Diag

IIP PID

Field

Select the IIP (ISDB-T Information Packet) PID

Partial

Reception

Tick box Set the partial Reception mode

Emergency

Broadcasting

Tick box Set the Emergency Broadcasting flag on 1 segment

#1 Broadcast Type:
The ISDB-T offers 3 types of broadcasting: Digital television using the 13 segments, 1-Segment

Radio and 3-Segment radio. Use this drop down to select the desired service type.

#2 Mode:
The ISDB-T offers 3 modes for broadcasting: mode 1, 2 and 3.
Mode 1 uses 108 carriers per segment
Mode 2 uses 216 carriers per segment
Mode 3 uses 432 carriers per segment.
Use this drop down to select the desired mode.

#3 Guard:
The guard interval is a time-redundant section of information that adds a copy of the latter portion

of a symbol to the symbol’s “front porch” with the aim of absorbing interference from multipath-

delayed waves.
The guard interval can be set to ¼, 1/8, 1/16, 1/32.

#4 IIP PID:
IIP stands for ISDB-T Information Packet. IIP are not passed to the modulator. IIPs contain an

important data table called TMCC (Transmission and Multiplex Configuration Control). Most

significantly, the TMCC data includes the precise timing parameters required to enable a modulator

to accurately synchronise with other modulators in a Single Frequency Network (SFN) and the

modulation parameters that the modulator should use for each hierarchical layer. This field allows

setting the PID used to transfer this data to the modulator.