Table of Contents
Advertisement
SDM-300A Satellite Modem
C.2.3
Scrambling Types
The operator can select one of the following scrambling types:
CCITT V.35
CCITT V.35
Fairchild compatible
2^15-1 Synchronous
Modified V.35
None
C.2.4
Differential Encoder
The differential encoder (On or Off) takes care of one set of ambiguities due the error
correction codes being transparent.
C.2.5
BPSK Bit Ordering
The encoder has the ability to select whether I is the first bit or Q is the first bit in the
symbol word grouping for compatibility with any system. For standard operation Q is the
first bit.
•
•
C.2.6
Interleaver (Reed-Solomon Codec)
Observe the following:
•
•
•
•
Rev. 4
EFData/Comstream compatible. Sequential only
Intelsat modified. Viterbi only
IBS, Drop & Insert, ASYNC, and IESS-310
Closed Network Reed-Solomon
Viterbi (Standard/Non-Standard)
Sequential (Standard/Non-Standard)
QPSK - Depth 4 (IBS, IDR, D&I)
8PSK - Depth 4 (No Overhead, IBS, D&I) (IESS-310)
Depth 8 (Closed Network, Async)
8PSK - Depth 8 (IDR) (IESS-310)
Specifications
C–7
Advertisement
Table of Contents
