Specifications; Theory Of Operation; Figure 15-2.Reed-Solomon Codec Block Diagram - Comtech EF Data SNM-1001L Installation And Operation Manual

SNM-1001L Satellite Modem
Reed-Solomon Codec
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 15-2 for a block diagram of the
Reed-Solomon Codec.
MUXDATA
MUX CLK
MAIN
INTERFACE
PCB
DMXDATA
DMX CLK
15.1.1

Specifications

The following overhead types and data rates are supported by the Reed-Solomon Codec option.
Refer to
15.1.2

Theory of Operation

The Reed-Solomon Codec works in conjunction with the interface card to provide concatenated
convolutional encoding and decoding.
The two main sections of the Codec are:
•
•
RX
LOOPBACK
DATA
MUX
RX CLK

Figure 15-2.Reed-Solomon Codec Block Diagram

Appendix A for BER specifications.
Overhead Type
AUPC
No Overhead
Reed-Solomon encoder
Reed-Solomon decoder
TX DATA
TX CLK
REED-SOLOMON
OVERHEAD
PROCESSOR
Data Rate
2.4 to 2048 kbps
2.4 to 4.555 kbps
15–2
Revision 1
MN/SNM1001L.OM
CHASSIS
INTERFACE
CDRDATA
LOOPBACK
CDR CLK
MUX
MAIN
PCB
DECDATA
DEC CLK