Atsc (8-Vsb) Digital Channel Configuration; Dvb-S/S2 (Qpsk/8Psk) Digital Channel Configuration - Promax US TV EXPLORER II Manual De Uso

5.13.3 ATSC (8-VSB) 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) Spectral Inv. (spectral inversion)
This option enables spectral inversion to be applied to the input signal, though in
the majority of cases it should be in the OFF position (not inversion).
10
FREQ:
CH:
MPEG-2
Figure 21.- Screen of measurements configuration (8-VSB signals).

5.13.4 DVB-S/S2 (QPSK/8PSK) 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 over a range from 1.3 MHz to
60.75 MHz. The selection of this parameter is essential for the correct operation
of the tuner, as it affects the frequency separation of the carriers.
2) Spectral Inv
If necessary, it activates 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).
Page 42
CONFIGURATION
» CHANNEL SET:
» SIGNALL:
S YSTEM :
30 50 70
FRAME RATE :
57.00 MHz C/N:
CHANNEL BW :
-3 kHz »
» SPECTRAL INV:
A02 MER:
EXIT
SER:
VBER:
USER'S MANUAL. US TV EXPLORER
[17] key to access the
[1] to access the 8-VSB
FCC
8-VSB
NTSC
90 110 130
60Hz
>21.3 dB
6.00MHz
POWER: 55.8 dBµV
OFF
19.5 dB
1.0E-5
1.0E-8
[17] key to access the
[1] to access the QPSK/8PSK
II
11/2013