Promax HD RANGER+ Manual page 127

Digital CABLE television signal of FIRST generation
A1.1.5
(DVB-C standard/QAM modulation)
DVB-C Parameters
Bandwidth channel
►
It displays the channel bandwidth up to 9.2 MHz.
Spectral inversion
►
It detects if the input signal has been inverted.
Symbol Rate
►
It represents the number of times the signal status changes in a period of
time. The bandwidth is related to this parameter.
Roll-Off Factor
►
Roll-off factor of Nyquist filter. It indicates the bandwidth excess over the
ideal bandwidth.
Constellation
►
Modulation used by the carriers. It also defines immunity to the system
noise (16QAM, 32QAM, 64QAM, 128QAM and 256QAM).
April 2013
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