Dvb-T/H (Cofdm) Digital Channel Configuration - Promax TV Explorer HD Manual De Usuario

4) Modulation
It defines the modulation type. When selecting this function and turn the rotary
selector
256.
Figure 19.- Screen of mesurement configuration (QAM signals).

5.13.2 DVB-T/H (COFDM) 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 between 6 MHz, 7 MHz and 8 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) Guard Interval
The Guard Interval parameter corresponds to the dead time between symbols, its
purpose is to permit a correct detection in multi-path situations. This parameter is
defined according to the symbol length: 1/4, 1/8, 1/16, 1/32. To modify its value, by
turning the rotary selector
and then press it : a menu with the available values will appear. Turning the rotary
selector [1] select the desired value and finally press it to validate.
Page 42
[1] to choose one of the following modulations: 16, 32, 64, 128 and
[1], place the marker over the Guard Interval field
USER'S MANUAL. TV EXPLORER HD / HD
[17] key to access to the
[1] to access the COFDM
LE
05/2011