Chapter 11 DSNG Configuration
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319
Ellipse 3000 Release 3.0, Rev. B
Common Modulation Parameters
11.4.5
FEC and Modulation
The FEC (Forward Error Correction) and Modulation parameter sets the FEC value and the
modulation mode of the up-converter. For example, with default value at QPSK 2/3, the
Modulation mode to QPSK and the FEC rate to 2/3.
The available options change according to the selected modulation scheme. The following table
details each modulation scheme and its available Modulation modes and FEC values.
Front Panel
To set the FEC and Modulation parameter on the front panel:
❖
Navigate
Root > IF
or
L-Band Modulation > FEC and Modulation
(see the following example
of the screen for DVB-S2 modulation scheme).
Web Manager
To set the FEC and Modulation parameter in the Web Manager:
❖
Select
DSNG > MODULATOR AND UPCONVERTER
(see Figure 11–2 or Figure 11–3).
Module
Modulation Mode
FEC Rate
DVB-S2
QPSK
1/4, 1/3, 2/5, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
8PSK
3/5, 2/3, 3/4, 5/6, 8/9, 9/10
16APSK
2/3, 3/4, 4/5, 5/6, 8/9, 9/10
DVB-S
QPSK
1/2, 2/3, 3/4, 5/6, 6/7, 7/8
8PSK
2/3, 5/6
16QAM
3/4, 7/8
FEC and Modulation
‚ QPSK 1/4 (DVBS 2 only)
‚ QPSK 1/3 (DVBS 2 only)
‚ QPSK 2/5 (DVBS 2 only)
‚ QPSK 1/2
