Comtech EF Data SDM-300L3 - Manual (Page 209)

SDM-300L3 Satellite Modem Revision 1
Modem Types MN/SDM300L3.IOM
5–9
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.
Table 5-8. Reed-Solomon Modes
Modem Menu 1,2 Description
Utility Modem
Type
Configuration
Modulator TX
or Demodulator
RX Rate 3
Utility
Modulator or
Demodulator 4
Overhead Type Scrambler N K T I Mode
D&I
8-PSK 2/3 IES-310 ON +
Intelsat Open TCM/IDR
Small carrier 309 219 201 9 4 IESS-310 Compliant
(8PSK 2/3 only)
IDR 8-PSK 2/3 IES-310 ON +
Intelsat Open TCM/IDR
(T1, E1
5 , T2 5 , E2)
V.35 219 201 9 8
EFD QPSK
OQPSK
EFD Closed
No Overhead
EFD MOD
V.35 225 205 10 8
EFD 8-PSK 2/3 EFD CLOSED
IESS-310 ON No Overhead EFD MOD
V.35 219 201 9 4
ASYNC QPSK
8-PSK 2/3
EFD CLOSED
IES-310 OFF ASYNC Overhead EFD MOD
V.35 225 205 10 8
ASYNC 8-PSK 2/3 EFD CLOSED
IESS-310 ON ASYNC Overhead EFD MOD
V.35 219 201 9 4
VSAT IBS QPSK
BPSK
Intelsat Open VSAT IBS
(Compliant = No
Overhead) 309 219 201 9 4
309 IBS QPSK Intelsat Open IBS 309 219 201 9 4
D&I QPSK Intelsat Open IDR Small Carrier
(D&I) 309 126 112 7 4
IDR QPSK Intelsat Open IDR, T1 Intelsat V.35 225 205 10 4
IDR QPSK Intelsat Open IDR, E1 Intelsat V.35 219 201 9 4
IDR QPSK Intelsat Open 5 IDR, T2 Intelsat V.35 194 178 8 4
IDR QPSK Intelsat Open
5 IDR, E2
Intelsat V.35 194 178 8 4
Non-IESS-310
Compliant 8-PSK 2/3
only
IESS-308/309
Compliant (Open) only
Non-IESS modes For
All other Rate (BPSK,
QPSK, OQPSK,
5 8-PSK 5/6, 5 16-QAM)
IBS QPSK Intelsat Open IBS 309 126 112 7 4 Legacy EFD (IBS)
IESS-314 Compliant (8PSK 2/3 only)
Same as IESS-310 Compliant 8PSK 2/3
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