Reed-Solomon Modes; Table 5-8. Reed-Solomon Modes - Comtech EF Data SDM-300L3 Installation And Operation Manual

SDM-300L3 Satellite Modem
Modem Types
5.8

Reed-Solomon Modes

Reed-Solomon polynomial is compatible with Intelsat (IESS-308, IESS-309, IESS-310, and
IESS-314). Table 5-8 shows the Reed-Solomon parameter used for various configurations.
Configuration
Modulator TX
Utility Modem
or Demodulator
Type
RX Rate
8-PSK 2/3
D&I
IDR 8-PSK 2/3
EFD QPSK
OQPSK
EFD 8-PSK 2/3
ASYNC QPSK
8-PSK 2/3
ASYNC 8-PSK 2/3
VSAT IBS QPSK
BPSK
309 IBS QPSK
D&I QPSK
IDR QPSK
IDR QPSK
IDR QPSK
IDR QPSK
IBS QPSK
IESS-314 Compliant (8PSK 2/3 only)
Where:
N = Coded Reed-Solomon block length (Number of bytes)
K = Uncoded Reed-Solomon block length (Number of bytes)
T = Maximum number of byte corrections (T =[N-K] /2)
I = Interleave Depth

Table 5-8. Reed-Solomon Modes

1,2
Modem Menu
Utility
Modulator or
3 4
Demodulator
IES-310 ON + TCM/IDR
Intelsat Open Small carrier
IES-310 ON + TCM/IDR
Intelsat Open (T1, E1
EFD Closed
No Overhead
EFD CLOSED No Overhead
IESS-310 ON
EFD CLOSED ASYNC Overhead
IES-310 OFF
EFD CLOSED ASYNC Overhead
IESS-310 ON
Intelsat Open VSAT IBS
(Compliant = No
Overhead)
Intelsat Open IBS
Intelsat Open IDR Small Carrier
(D&I)
Intelsat Open IDR, T1
Intelsat Open IDR, E1
5
Intelsat Open
Intelsat Open
5
Intelsat Open IBS
Same as IESS-310 Compliant 8PSK 2/3
Overhead Type Scrambler
309
V.35
5 5
, T2 , E2)
EFD MOD
V.35
EFD MOD
V.35
EFD MOD
V.35
EFD MOD
V.35
309
309
309
Intelsat V.35
Intelsat V.35
IDR, T2 Intelsat V.35
Intelsat V.35
IDR, E2
309
5–9
Revision 1
MN/SDM300L3.IOM
Description
N K T I
219 201 9 4 IESS-310 Compliant
(8PSK 2/3 only)
219 201 9 8
225 205 10 8
219 201 9 4
Non-IESS-310
225 205 10 8
Compliant 8-PSK 2/3
only
219 201 9 4
IESS-308/309
Compliant (Open) only
219 201 9 4
Non-IESS modes For
219 201 9 4
All other Rate (BPSK,
126 112 7 4
QPSK, OQPSK,
5
8-PSK 5/6,
225 205 10 4
219 201 9 4
194 178 8 4
194 178 8 4
126 112 7 4 Legacy EFD (IBS)
Mode
5
16-QAM)