Promax HD RANGER, User Manual

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A1.1.7
Digital CABLE television signal of SECOND generation
(DVB-C2 / QAM modulation)
A1.1.7.1 DVB-C2 Parameters
►
Channel Bandwidth
It is the channel bandwidth between 6 MHz, 7 MHz and 8 MHz. This
parameter affects the frequency separation of the carriers.
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Spectral inversion
It detects if the input signal has been inverted.
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Guard Interval
It corresponds to the dead time between symbols; its purpose is to detect
echoes due to multi-paths. This parameter is expressed in terms of the
symbol duration: 1/64 or 1/128.
►
Constellation
QPSK COFDM modulation with constellations, 16QAM, 64QAM, 256QAM,
1024QAM, 4096QAM. The constellation refers to all the selected PLP data.
►
Code rate
It defines the ratio between the number of data bits and the total number of
bits transmitted (the difference corresponds to the number of control bits for
the error detection and recovery): 2/3, 3/4, 4/5, 5/6, 8/9, 9/10.
►
DSLICE id
Identifier a DSLICE is a data packet containing a group of several LPDs.
►
PLP id
PLP (Physical Layer Pipes) identifier. Layers are used by the system to
transmit compressed data such audio, video and more.
August 2012
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