Promax TV EXPLORER HD+ Manual De Instrucciones página 169

USER'S MANUAL. TV EXPLORER HD+
Channel BW (Channel bandwidth) Enables the channel bandwidth to be selected
between 5, 6, 7 and 8 MHz. The selection of this parameter is
essential for the correct operation of the tuner, as it affects the
frequency separation of the carriers.
Spectral Inv (Spectral inversion) This option detects if there is a spectral
inversion applied on the input signal.
Carriers (Number of carriers) It defines the number of modulation carriers
between 1k, 2k, 4k, 8k, 8k+EXT, 16k, 16k+EXT, 32k, 32k+EXT.
Guard Interval The Guard Interval parameter corresponds to the dead time
between symbols, its purpose is to permit a correct detection in
multi-path situations. This parameter is defined according to the
symbol length: 1/4, 19/256, 1/8, 19/128, 1/16, 1/32, 1/128.
Pilot Pattern Several pilot patterns are available, named PP1 to PP8, with the
intention of providing efficient options for different channel scenarios.
Each pattern can (in principle) support time and frequency variations
up to corresponding Nyquist limits. The applicable limits do depend
on certain assumptions as to how the receiver works, in particular
whether it uses interpolation in both time and frequency, or in
frequency only, etc.
PLP Mode It is determined by the number of stream at input. For a single
stream is Single. For several streams is Multiple.
PLP Code Rate Defines the ratio between the data bits number and the total number
of bits transmitted (the difference corresponds to the number of
control bits for the error detection and recovery): 1/2, 3/5, 2/3, 3/4,
4/5, 5/6
PLP Constellation
COFDM Modulation with QPSK, 16QAM, 64QAM, 256QAM constellations. A
constellations refers to all the data from the selected PLP.
PLP Constellation
Rotation It shows if the constellation is rotated (ON) or not (OFF).
PLP ID: It is the PLP identifier. When PLP mode is single, it identifies the
input stream (0-256). When PLP mode is multiple, the user can
select the PLP ID to see.
Cell ID, Network ID and T2 System ID parameters are defined in accordance with
the DVB standard.
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