Comtech EF Data SDM-300L3 - Manual (Page 156)

SDM-300L3 Satellite Modem Revision 1
Front Panel Operation MN/SDM300L3.IOM
4–88
FUNCTION SELECT: UTILITY: MODULATOR: ENCODER TYPE
ENCODER TYPE
VITERBI
Encoder type selection. Select VITERBI, SEQUENTIAL, or TURBO encoder type.
Notes:
1. A Sequential Encoder Type and a 3/4 Code Rate combination are not compatible
with a CSC CLOSED Modulator Type.
2. Change only when Modem Type (under Utility: Modem Type) is EFD, ASYNC,
or Custom.
FUNCTION SELECT: UTILITY: MODULATOR:
SCRAMBLER TYPE
SCRAMBLER TYPE
INTELSAT V.35
This menu is status only and displays:
• With Overhead and IBS Scrambler ON: IBS SYNC
• With RS Scrambler On: EFD MOD V.35 or IBS SYNC
• With Turbo Scrambler On: TURBO SYNC
Intelsat V.35, FDC MOD V.35, ITU V.35, or Off.
Scrambler Type Description
Intelsat V.35 Self-SYNC scrambling per IESS-308.
FDC MOD V.35 Compatible with Fairchild modems.
ITU V.35 Closed Network Viterbi and Sequential with No Reed-Solomon.
OFF Scrambling is disabled.
IBS SYNC Intelsat per IESS-309.
EF MOD V.35 Comtech EFD proprietary scrambling for Closed Network with
Reed-Solomon On.
Turbo SYNC Turbo SYNC - scrambler