Promax -12 User Manual page 35

CONFIGURATION parameters of DIGITAL CHANNELS in CHANNEL TUNING
mode
DESCRIPTION
Digital channel bandwidth
Frequency where noise is
measured in the C/N
measurement.
Noise measuring mode.
System (according to country)
QAM Modulation
Symbol Rate
Constellation Quadrant View
The CTB SHOWED parameter allows defining the method of measurement for
the CTB. "IN CH" (within the channel) is the suitable method whenever the
carrier of the channel in study can be turned off. If it is not possible, as
approach, any other channel (free) can be defined for the measurement of the
CTB.
Parameters ΔFCS01, ΔFCS02, ΔFCS03 and ΔFCS04 allow you to modify the
frequencies where the CSO is measured (the equipment admits values from -0.5
to -2.50 and from 0.5 to 2.5 MHz). These parameters are modified digit to digit,
beginning by the one of smaller weight.
January 2015
PARAMETER
CHANNEL BW
NOISE FREQ.
NOISE MODE
ANNEX ITU-T
MODULATION
SYMBOL RATE
QUADRANT
Figure 25. CH-FR Configuration 2/2.
VALUES
From 0.3 to 9.9 MHz.
± 99.9 MHz (relative mode).
5.00 MHz to 863.00
(absolute mode).
FREQ (Absolute): Noise level
is measured at the frequency
defined by NOISE FREQ.
ΔF (Relative): The
defined by NOISE FREQ. is
added to the
frequency.
BW/2 (Relative):
measured at a
defined as half the bandwidth.
DVB, B, C
16, 32, 64, 128, 256
1.000 to 7.200
Q1, Q2, Q3, Q4, Q1+, Q2+,
Q3+, Q4+, ALL
MHz
value
tuning
It is
frequency
(*)
3-29