Comtech EF Data SDM-300A - Manual (Page 218)

SDM-300A Satellite Modem Revision 6
Modem Types MN/SDM300A.IOM
6-10
6.2 Reed-Solomon Modes
Reed-Solomon polynomial is compatible with Intelsat (IESS-308, IESS-309,
IESS-310, and IESS-314). Table 6-10 shows the Reed-Solomon parameter used
for various configurations.
Table 6-10. 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 IESS-310 ON +
Intelsat Open TCM/IDR
Small carrier 309 219 201 9 4 IESS-310 Compliant (8-
PSK 2/3 only)
IDR 8-PSK 2/3 IESS-310 ON +
Intelsat Open TCM/IDR
(T1, E1
5 , T2 5 , E2 5 )
V.35 219 201 9 8
EFD QPSK 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 EFD CLOSED 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 Intelsat Open VSAT IBS
(Compliant = No
Overhead) 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 IDR, T2 5 Intelsat V.35 194 178 8 4
IDR QPSK Intelsat Open IDR, E2 5 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, Offset QPSK,
8-PSK 5/6
5 , 16-QAM 5 )
IBS QPSK Intelsat Open IBS 309 126 112 7 4 Legacy EFD (IBS)
IESS-314 Compliant (8-PSK 2/3 only) Same as IESS-310 Compliant 8-PSK 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