Radyne QAM256 User Manual Page 130

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User Manual
Chapter 6. IRD Management
Page 6-6 P/N 2349-72712-01
Table 6-1: Configuration/Receiver Menu Options
DSNG
QPSK
QAM
ATM
G.703
OPTION DESCRIPTION
þ
þ
þ
Spectral
Inversion
Spectral Inversion Select
Selects the operation mode of the spectral inversion
options.
Available options:
Automatic: IRD automatic selection between Normal and
Inverted spectral inversion.
Normal: Normal spectral inversion.
Inverted: Inverted spectral inversion.
þ
þ
Input Signal
Source
Input Select
Selects the input source for the IRD Receiver input.
Available options:
In-A: Selects Input A
In-B: Selects Input B
NOTE (þ*)
The In-B connector is standard in the DSNG
application.
For all other receivers (QPSK, QAM, ATM and
G.703) the
IN-B connector is connected as loop-through of In-A
input.
As an option, an additional, independent In-B input can be
added to these receivers. When this option is implemented
for any one of the receivers, the Input Select function is
available in the Receiver Configuration Menu to select
between In-A and In-B.
þ
Modulation
Mode
Modulation Mode Select
Selects the modulation mode for the DSNG IRD. Available
options:
MOD QPSK: Quadrature Shift Keying Modulation.
MOD 8PSK: Eight Phase Shift Keying Modulation.
MOD 16 QAM: 16 Quadrature Amplitude Modulation.
Automatic: Automatic Selection of modulation.
þ
Nyquiat Filter
Roll Off
Nyquist Filter Type Selection
Selects the roll-off parameter for the Nyquist filter.
Available options:
35%: 35% roll-off parameter.
25%: 25% roll-off parameter.
Automatic: Automatic selection of the roll-off parameter
(25% or 35%).
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