Promax US TV EXPLORER II, User Manual

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USER’S MANUAL. US TV EXPLORER II
Page 42 01/2008
5.13 Measurements configuration
With the aim of taking the measurements of all types of signals some times could
be necessary that user enters parameters relative to particular characteristics of these
signals, whether an automatic detection has not been possible, or these parameters
differ from the standard corresponding ones.
Press the Measurements Configuration [17] key to access to the
CONFIGURATION menu and turn the rotary selector [1] to access to parameters, which
are modifiable by the user.
5.13.1 ITU-T J.83/B (QAM Annex-B) 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 Annex-B
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)
Modulations
It defines the modulation type. When selecting this function and pressing the
rotary selector [1] a multiple-choice menu will appear on the screen, this menu
permits to choose one of the following modulations:
64 or 256 .
FREQ:
CH:
C/N:
POWER:
MER:
BER:
»
16.5
66.2
24.7 dB
dBµV
dB MHz
kHz
213.00
-3
A13
10 30 50 70 90 110 130
5.6E-7
CONFIGURATION
» CHANNEL SET:
SYSTEM:
FRAME RATE:
CHANNEL BW:
» SPECTRAL INV:
SYMBOL RATE:
» MODULATION:
EXIT
» SIGNAL:
FCC
NTSC
60Hz
6.00MHz
OFF
5361kSymb
256QAM
ITU-T J.83/B
Figure 19.- Screen of measurement configuration ( QAM Annex-B signals).