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SDM-300A Satellite Modem
The Reed-Solomon Codec works in conjunction with the Viterbi decoder and includes
additional framing, interleaving, and Codec processing to provide concatenated FEC and
convolutional encoding and decoding.
Refer to Figure A-15 for a block diagram of the Reed-Solomon Codec.
M U X D ATA
M U X C LK
M A IN
IN T E R FAC E
P C B
D M X D ATA
DM X C L K
A.2.1.1
Specifications
Refer to Table A-20 overhead types and data rates supported by the Reed-Solomon
Codec option are listed below. Refer to
Rev. 4
R EE D -SO LO M O N
R X
LO O P BA C K
D ATA
M U X
R X C L K
Figure A-15. Reed-Solomon Codec Block Diagram
Table A-20. Specifications
Overhead Type
IDR (T1)
IDR (E1)
D&I
IBS
ASYNC
No Overhead
T X D ATA
TX C LK
O V E R H E AD
PR O C E SS O R
Chapter 1
for BER specifications.
Data Rate
1640 kbit/s
2144 kbit/s
64 to 1920 kbit/s
64 to 2048 kbit/s
2.4 to 2048 kbit/s
2.4 to 4.555 kbit/s
Options
C H A SS IS
IN T E R FAC E
C D R DATA
L O O P B A C K
C D R C L K
M U X
M A IN
P C B
D EC D ATA
D EC C LK
A–61
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