Atsc (8-Vsb) Digital Channel Configuration; Dvb-S/S2 (Qpsk/8Psk) Digital Channel Configuration - Promax US TV EXPLORER 2 User Manual

USER'S MANUAL. US TV EXPLORER II

5.13.2 ATSC (8-VSB) Digital Channel Configuration

Press the Measurements Configuration
CONFIGURATION menu and turn the rotary selector [1] to access the 8-VSB 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 20.- Screen of mesurement configuration (8-VSB signals).
5.13.3 DVB-S/S2 (QPSK) Digital Channel Configuration
Press the Measurements Configuration
CONFIGURATION menu and turn the rotary selector [1] to access the QPSK/8PSK
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, 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).
10/2007
CONFIGURATION
» CHANNEL SET:
» SIGNALL: 8-VSB
S YSTEM : NTSC
30 50 70 90 110
FRAME RATE : 60Hz
57.00 MHz C/N: >21.3
CHANNEL BW : 6.00MHz
-3 kHz » POWER: 55.8
» SPECTRAL INV:
A02 MER: 19.5
EXIT
SER: 1.0E-5
VBER: 1.0E-8
[17] key to access to the
FCC
130
dB
dBµV
OFF
dB
[17] key to access to the
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