Dss (Qpsk) Digital Channel Configuration - Promax TV EXPLORER HD ATSC Manual De Instrucciones

5.13.5 DSS (QPSK) Digital Channel Configuration

Press the Measurements Configuration
CONFIGURATION menu and turn the rotary selector
signals parameters which can be defined by user and are described below:
1) Channel BW (channel bandwidth)
Enables the channel bandwidth to be selected. The selection of this parameter is
essential for the correct operation of the tuner, as it affects the frequency
separation of the carriers. If you change the bandwidth the Symbol Rate changes
proportionally and vice versa.
2) Spectral Inv
If necessary, activate the Spectral inversion (On). Reception will be bad if
spectral inversion has been incorrectly selected.
3) 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).
4) 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
5) Sat Band
Selects the High or Low frequency band for satellite channel tuning.
Page 46
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USER'S MANUAL. TV EXPLORER
[17] key to access the
[1] to access the QPSK
HD ATSC
12/2010