Promax US TV EXPLORER II, Руководство пользователя

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USER’S MANUAL. US TV EXPLORER II
01/2008 Page 43
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5.13.2 DVB-C (QAM) Digital Channel Configuration
Press the Measurements Configuration [17] key to access to the
CONFIGURATION menu and turn the rotary selector [1] to access the QAM signals
parameters, which can be defined by user and are described below:
1)
Spectral inversion
If necessary, activate the Spectral inversion ( On ). If the spectral inversion is not
correctly selected, reception will not be correct.
2)
Symbol Rate
When selecting this function and pressing the rotary selector [1] is possible to
choose the symbol rate.
3)
Modulation
It defines the modulation type. When selecting this function and turn the rotary
selector [1] to choose one of the following modulations:
16 , 32 , 64 , 128 and 256 .
FREQ:
CH:
C/N:
» POWER:
MER:
BER: 16.5
66.2
24.7 dB
dBµV
dB MHz
kHz
650.00
-3
43
10 30 50 70 90 110 130
3.4 E-4
MPEG-2 TS
CONFIGURATION
» CHANNEL SET:
» SYSTEM:
» FRAME RATE:
» CHANNEL BW:
» SPECTRAL INV:
» SYMBOL RATE:
» MODULATIONS:
EXIT
» SIGNAL:
CCIR
PAL
50Hz
8.00MHz
OFF
6875kSymb
64QAM
DVB-C
Figure 20.- Screen of measurement configuration ( QAM signals).
5.13.3 ATSC (8-VSB) Digital Channel Configuration
Press the Measurements Configuration [17] key to access to the
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).