Promax MO-170 Manual De Instrucciones página 65

USER'S MANUAL. MO-170
BW: This option enables output channel bandwidth selection. The COFDM signal
can be generated with a BW of 6 MHz, 7 MHz and 8 MHz.
8 MHz: selects an 8 MHz bandwidth
7 MHz: selects a 7 MHz bandwidth
6 MHz: selects a 6 MHz bandwidth
Hierarchy: Using this function the COFDM modulator is switched between
hierarchical mode, with different alpha constellation ratios, and non-hierarchical
mode operation. The options available are:
OFF: non-hierarchical operation
a=1: hierarchical mode with alpha = 1
a=2: hierarchical mode with alpha = 2
a=4: hierarchical mode with alpha = 4
HP Code Rate: Using this function, the user can modify the convolutional code
rate for the High Priority (HP) Transport Stream (TS). The available options are as
follows:
• 1/2
• 2/3
• 3/4
• 5/6
• 7/8
LP Code Rate: Using this function, the user can modify the convolutional code
rate for the Low Priority (LP) Transport Stream (TS). The available options are as
follows:
• 1/2
• 2/3
• 3/4
• 5/6
• 7/8
Constellation: Here the menu allows the selection of one of the available
constellations. The options are:
• QPSK
• 16QAM
• 64QAM
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