Comtech EF Data SLM-5650A Installation And Operation Manual page 122

(CONFIG:) Rx  Demod
Demod: FEC:VIT
RS:N/A Diff:On
Use the arrow keys to select FEC, Type, Rate, RS, Diff, or Descram. Press [ENT]. For any
option, use the  arrow keys to scroll through the available settings. Select your setting. Press
[ENT] to finish.
Option
FEC
Type
(Modulation)
Rate
RS
Diff
Descram
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:BPSK Rate:3/4
Descram:OM-73
Standard settings:
VIT (Viterbi) – K=7 convolutional encoder.
•
NONE – Uncoded.
•
Optional settings:
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
•
Standard settings:
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; or 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
•
Reed-Solomon Decoder: On or Off.
Differential Decoder: On or Off.
Descrambling:
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 descrambler synchronized to the Turbo block;
•
OM-73 – OM-73 Linkabit modem compatibility mode;
•
Synch – Synchronous descrambler synchronized to the Reed-Solomon frame.
•
Off – Descrambling is disabled.
•
(E)
Settings
7–16
SLM-5650A Satellite Modem
Revision 10
MN-SLM-5650A