2022-07-27 | Technical improvements, changes in design, printing- and other errors reserved.
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Bandwidth
If CCIR is selected as the
Norm
, the bandwidth of the channels can be changed.
With a larger bandwidth, more data can be transmitted in one channel.
By adjusting the bandwidth, the channels no longer correspond to the channel
grid specified by the
Norm
.
Guard Interval
A guard interval is transmitted between the transmitted symbols of the useful
signal. The guard interval protects against inter-symbol interferences.
A very long guard interval (e.g. 1/4) leads to a very low data rate. A small guard
interval is usually sufficient for transmission in a coaxial distribution network.
Transmission Modes
The setting options for the transmission mode depend on the modulation mode
(see 5.2.1 on page 47).
DVB-T2 8x16K: The transmission mode can be set between 1k and 16k (ext).
16k (ext) allows the shortest guard interval in percent and the highest data
transmission.
DVB-T2 4x32K: The transmission mode can be set between 1k and 32k (ext).
32k (ext) allows the shortest guard interval in percent and the highest data
transmission.
FEC length
An FEC frame with 64k FEC length or a (short) one with 16k FEC length can be
configured.
L1-Post Constellation
The L1 post signaling contains parameters that provide information to the
receiver. Constellation types BPSK, QPSK, QAM16 and QAM64 can be
configured for L1 post signaling.
L1 pre-signalling is always BPSK modulated.
Pilot Pattern
Depending on the Guard Interval and the transmission mode, Pilot Pattern PP1
to PP8 can be selected.
Fine Level
The level fine adjustment attenuates the output level of each individual
modulator output separately from 0 to -3 dB.
In addition, each modulator output can be disabled (Off option).
Fine Tune
The fine tuning of the output channel is performed in 0.5 MHz steps.
Note
Some configuration options are dependent on each other. In this case,
selectable values are highlighted in white, non-selectable values in gray.
