IRD-2900 Series Professional Integrated Receiver ... - TBC Integration

ROLL- OFF
User Manual
Operation and Management
The Roll-off menu is used for setting the receiver’s roll-off factor value according
to the roll-off factor of the transmitted signal.
The Roll-off factor is the factor that is used for the base-band shaping of the
transmitted signal. Set the Roll-Off factor in accordance with the transmitted
Roll-Off factor.
Roll Roll-off
Roll
off
1���� AUTOMATIC
AUTOMATIC
2���� 35% 5%
3���� 25 25% 25
Available options for the Roll-off factor are:
• 35%, 25%, 20%
FEC RATE
The FEC Rate parameter sets the Forward error correction rate value. The FEC
parameter can be acquired from the satellite transponder information or can be
set to automatic. When in Automatic mode, the IRD-2900 device tries all FEC
rates until locking the rate to the transport stream.
FEC Rate
1���� AUTOMATIC
AUTOMATIC
AUTOMATIC
2���� 1/2
1/2
3���� 2/3
2/3
4���� 3/4
3/4
5���� 5/6
5/6
6���� 7/8
7/8
6���� 88/9
8
The available options are:
• Automatic
• 1/2
• 2/3
• 3/4
• 5/6
• 7/8
• 8/9
Page 4-38 (Rev. 4.6/ SW v1.80/ December 2007)