Promax Promax TV EXPLORER HD ISDB-Tb, Manual

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USER’S MANUAL. TV EXPLORER HD ISDB-T/T
B
11/2010 Page 47
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5.13.5 DSS (QPSK) Digital Channel Configuration
Press the Measurements Configuration [17] key to access the
CONFIGURATION menu and turn the rotary selector [1] to access the QPSK
signals parameters which can be defined by user and are described below:
1)
Spectral Inv
If necessary, activate the Spectral inversion ( On ). Reception will be bad if
spectral inversion has been incorrectly selected.
2)
Code Rate
Also known as Viterbi ratio. It defines the ratio between the number of data bits
and actual transmission bits (the difference corresponds to the control bits for error
detection and correction).
It permits to choose between 1/2 , 2/3 and 6/7 .
Figure 23.- Screen of measurement configuration ( DSS signals).
3)
Polarization
It affects to the signal reception in the SAT band (satellite). It allows selecting the
signal polarization among
Vertical/Right (vertical and circular clockwise) and
Horizontal/ Left (horizontal and circular counterclockwise) or, to deactivate the
polarization (
OFF
).
4)
Sat Band
Selects the High or Low frequency band for satellite channel tuning.
5)
LNB Low Osc.
Sets the LNB low band local oscillator.