Comtech EF Data SDM-9000 Installation And Operation Manual page 15

SDM-9000 Satelite Modem
A.2.1 Requirements ................................................................................................................................................... A-11
A.2.2 Baseband Physical Interfaces........................................................................................................................... A-12
A.2.2.1 ECL Physical Interface............................................................................................................................. A-12
A.2.2.2 PECL Physical Interface........................................................................................................................... A-13
A.2.3 DBS Baseband Interface .................................................................................................................................. A-14
A.2.3.1 DBS TX Baseband Interface .................................................................................................................... A-14
A.2.3.2 DBS RX Baseband Interface .................................................................................................................... A-14
A.2.4 Baseband Interface Requirements.................................................................................................................... A-15
A.2.4.1 Timing for Transmit Baseband Interface.................................................................................................. A-15
A.2.4.1.1 DBS Mode TX SYNC Pulse Timing ................................................................................................ A-16
A.2.4.2 Timing for Receive Baseband Interface ................................................................................................... A-16
A.2.4.2.1 DBS Mode Receive SYNC Pulse Timing ......................................................................................... A-17
A.2.5 SYNC Decoder (Correlater) ............................................................................................................................ A-18
A.2.5.1 DBS Mode SYNC Decoder for 204-Byte Packets ................................................................................... A-18
A.2.5.1.1 TX Functions of the DBS Mode SYNC Decoder ............................................................................. A-18
A.2.5.1.2 RX Functions of the DBS Mode SYNC Decoder ............................................................................. A-18
A.2.6 SYNC 1 Inversion and Scrambler/Descrambler .............................................................................................. A-19
A.2.6.1 DBS Mode (De)Scrambler for 204-Byte Packets..................................................................................... A-20
A.2.7 Reed-Solomon Coder/Decoder ........................................................................................................................ A-21
A.2.7.1 DBS Mode Check Byte Framing for 204-Byte Packets ........................................................................... A-22
A.2.8 Depth 12 Interleaver/De-interleaver ................................................................................................................ A-23
A.2.9 Inner Coder/Decoder........................................................................................................................................ A-25
A.2.9.1 Punctured Operation................................................................................................................................. A-25
A.2.9.2 Signal Space Mapping .............................................................................................................................. A-27
A.2.10 Nyquist Filters................................................................................................................................................ A-28
A.2.11 DVB with Reed-Solomon BER (QPSK) ....................................................................................................... A-29
A.3 ESC 64 kbit/s Data Option ................................................................................................................................... A-31
APPENDIX B. REMOTE CONTROL OPERATION .......................................................... B-1
B.1 General ................................................................................................................................................................... B-1
B.2 Message Structure ................................................................................................................................................. B-2
B.2.1 Start Character ................................................................................................................................................. B-2
B.2.2 Device Address ................................................................................................................................................ B-2
B.2.3 Command/Responses ....................................................................................................................................... B-3
B.2.4 End Character................................................................................................................................................... B-3
B.3 Configuration Commands/Responses.................................................................................................................. B-4
B.3.1 Modulator......................................................................................................................................................... B-4
B.3.2 Demodulator .................................................................................................................................................... B-5
B.3.3 Interface ........................................................................................................................................................... B-6
B.3.4 System.............................................................................................................................................................. B-9
B.4 Status Commands/Responses ............................................................................................................................... B-10
B.4.1 Configuration ................................................................................................................................................... B-10
B.4.2 Error Performance............................................................................................................................................ B-15
B.5 Stored Faults.......................................................................................................................................................... B-19
GLOSSARY ...................................................................................................................... g-1
Rev. 4
Preface
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