Comtech EF Data SLM-5650A Installation And Operation Manual page 116

(CONFIG:) Tx  Mod
Mod: FEC:VIT
RS:Off Diff:On
Use the  arrow keys to select FEC, Type, Rate, RS, Diff, or Scram. Press [ENT]. For any
option, use the arrow keys to scroll through the available settings. Select your setting. Press
[ENT] to finish.
Option
FEC Standard settings:
Optional settings:
Type Standard settings:
(Modulation)
Rate
RS Reed-Solomon Encoder: On or Off
Diff Differential Encoder: On or Off
Scram
Scrambling (for energy dispersal):
When changing modulation type, the data rate must be set to a rate supported by the modulation
type or the change to the modulation type will not be allowed. Some choices will only be visible if
the modem is set to a compatible mode, or if an option is installed or enabled.
Front Panel Operation
Type:QPSK Rate:1/2
Scram:OM-73
VIT (Viterbi) – K=7 convolutional encoder.
•
NONE – Uncoded.
•
TURBO – Turbo Product Code, which is a block code.
•
SEQ – Sequential Encoder/Decoder.
•
ULL – Ultra Low Latency LDPC
•
LL – Low Latency LDPC
•
HP – High Performance LDPC
•
BPSK – Bi Phase Shift Keying.
•
QPSK – Quadrature Phase Shift Keying.
•
OQPSK – Offset Quadrature Phase Shift Keying.
•
Optional settings:
8PSK – 8 Phase Shift Keying.
•
8QAM – 8 Quadrature Amplitude Modulation
•
16QAM – 16 Quadrature Amplitude Modulation.
•
Viterbi – 1/2; 2/3; 3/4; 5/6; 7/8
•
Uncoded – 1/1
•
Turbo – 5/16; 3/4; 7/8; 17/18; 21/44
•
Sequential – 1/2; 3/4; 7/8
•
ULL – 1/2; 2/3; 3/4
•
LL – .378; .451; .541; 1/2; 2/3; 3/4; 7/8
•
HP – 1/2; 2/3; 3/4
•
V.35 – ITU standard.
•
MOD-V.35 (Modified V.35) – Comtech EF Data Closed Network with Reed- Solomon
•
compatible .
IBS – Used for IESS-309 operation.
•
Turbo – Synchronous scrambler synchronized to the Turbo block.
•
OM73 – Linkabit OM-73 modem compatibility mode.
•
Synch – Synchronous scrambler synchronized to the Reed-Solomon.
•
Off – Scrambling is disabled.
•
(E)
Setting
7–10
SLM-5650A Satellite Modem
Revision 10
MN-SLM-5650A