Measurements Configuration; Itu-T J.83/B (Qam Annex-B) Digital Channel Configuration - Promax US TV EXPLORER 2 User Manual

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
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
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.
10
FREQ:
CH:
Figure 19.- Screen of measurement configuration (QAM Annex-B signals).
Page 42
USER'S MANUAL. US TV EXPLORER II
CONFIGURATION
» CHANNEL SET:
» SIGNAL: ITU-T J.83/B
SYSTEM:
30 50 70 90 110
FRAME RATE:
213.00 MHz C/N:
CHANNEL BW: 6.00MHz
-3 kHz » POWER:
» SPECTRAL INV:
A13 MER:
SYMBOL RATE: 5361kSymb
BER:
» MODULATION: 256QAM
EXIT
[17] key to access to the
[17] key to access to the
FCC
NTSC
130
60Hz
16.5 dB
66.2 dBµV
OFF
24.7 dB
5.6E-7
10/2007