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

Available options for the Roll-off factor are:
• 35%
• 25%
• 20%
PILOTS
User Manual
Operation and Management
In order to expedite carrier recovery, the standard allows two operating modes
for each modulation type: Pilot-less (i.e. no Pilot symbols are inserted) and
Piloted, where Pilot symbols are inserted to aid carrier synchronization. The
Pilots menu enables to choose between the two operating modes. The following
figure illustrates the Pilots screen.
1���� OFF
OFF
2���� ON
ON
Pilots Pilots
The available options are:
• OFF – selects Pilot-less mode
• ON - selects Piloted mode
NOTE
The PLSCODE informs the receiver regarding the pilot configuration, which
resides in the PLHEADER. Usually, only a few modes, such as 8PSK rate 2/3,
16APSK rate 2/3 and 3/4, and 32APSK rate 3/4, need pilot assistance for carrier
recovery.
Page 4-28 (Rev. 4.6/ SW v1.80/ December 2007)