Specifications

Filename: T_ERRATA 2
Change Specifics:
5.7 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. Viterbi 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
8PSK 2/3 IES-310 ON +
Intelsat Open
TCM/IDR
Small carrier
309 219 201 9 4 IESS-310 Compliant
(8PSK 2/3 only)
IDR 8PSK 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 8PSK 2/3 EFD CLOSED
IESS-310 ON
No Overhead EFD MOD
V.35
219 201 9 4
ASYNC QPSK
8PSK 2/3
EFD CLOSED
IESS-310 = Off
ASYNC Overhead EFD MOD
V.35
225 205 10 8
ASYNC 8PSK 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 8PSK 2/3
only
IESS-308/309
Compliant (Open) only
Non-IESS modes For
All other Rate (BPSK,
QPSK, OQPSK,
5
8PSK 5/6,
5
16QAM)
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