Quantum and Evolution Series Installation and Operating Handbook
7-59
Edit-Tx-FEC-Outer-Advanced interleaver Depth Screen
Options:
4
code-words
8
code-words
12
code-words
Factory default:
4
code-words
Description:
Controls resilience to burst errors (larger depth gives best BER) through
data dispersal at the expense of introducing processing delay.
7.3.3.1.6 Edit-Tx-Scrambler Menu
This menu contains the following options:
•
Enable.
This is the master control for all scramblers. It can be used to switch
scrambling off or on. When on, the choice of scrambler can be made automatically by
the modem or selected manually.
•
Type.
This option selects the type of scrambler to apply when manual control of the
scrambler type is active (i.e. when automatic selection is switched off).
The following table defines normal operation with respect to scrambler selection.
RS interleaver depth: [4 codewords]
1:4 codewords 2:8 codewords
3:12 codewords
Scrambler: 1:Enable
2:Type