Specifications

3-70 888-2857-001 5/9/13
WARNING: Disconnect primary power prior to servicing.
Section 3 Operation
Platinum VAX-C Series
Figure 3-45 DVB-T2 Setup Screen 5
Table 3-44 Xmtr Home>Exciter Home>Setup>DVB-T2 Modulator>Next x4
(screen 5)
Field Explanation
Total PLP’s Total number of Physical Layer Pipes (PLP) sent in the T2 transmission.
In MPEG-TS input mode there is only 1 PLP. In T2MI input mode there
can be multiple PLPs from 1 to 255.
PLP Number The number of an individual PLP for parameter entry/display. In MPEG-
TS mode the PLP Number is 0 fixed. In T2MI mode the user can select
PLP Number from 0 to 254.
PLP ID (Hex) Enter value in white box. Range is 0 to 255. This 8-bit field uniquely
identifies a PLP in the T2 system.
Group ID (Hex) Enter value in white box. Range is 0 to 255. This 8-bit field identifies
uniquely a PLP within the T2 system.
PLP Type PLP (physical layer pipe) types include Type 1 (data), Type 2 (data).
HEM Choices are Yes or No. The mode adaptation module can process input
data in one of two modes, normal mode (NM) or high efficiency mode
(HEM). NM is in line with the Mode Adaptation in [i.3], whereas in
HEM, further stream specific optimizations may be performed to reduce
signalling overhead. The BBHEADER (see clause 5.1.7) signals the input
stream type and the processing mode.
Code Rate Choices are 1/2, 3/5, 2/3, 3/4, 4/5, or 5/6.This refers to the forward error
correction (FEC) which uses the LDPC (low density parity check) along
with BCH code. 1/2 code rate provides the most robust performance
coincident with the lowers data efficiency. 5/6 code rate provides the
least robust performance coincident with the higher data efficiency.
BCH performs the outer coding and LDPC performs the inner coding.