Comtech EF Data SDM-300L3 - Manual (Page 11)

SDM-300L3 Satellite Modem Revision 1
Preface MN/SDM300L3.IOM
ix
14.8 Bit Error Rate Performance .................................................................................... 14–22
14.8.1 Performance With Noise, Viterbi Decoder, and Closed Network ......................................14–22
14.8.2 Performance With Noise, Viterbi Decoder, and Reed-Solomon (Optional) ......................14–22
14.8.3 Performance With BPSK and {O}QPSK BER Performance..............................................14–22
14.8.4 Performance with Noise Turbo Product Codec (Optional) ................................................14–23
14.8.5 Performance With Noise, 1544 kbps Sequential Decoder and Reed .......................................
Solomon(Optional)..............................................................................................................14–23
14.8.6
Performance With Noise, 56 kbps Sequential Decoder (Optional) ...................................14–23
14.8.7 Performance With Noise, 1544 kbps Sequential Decoder (Optional) ...............................14–24
14.8.8 BER Threshold ..................................................................................................................14–24
14.9 Acquisition Time...................................................................................................... 14–25
14.9.1 Receive Carrier Acquisition Range....................................................................................14–26
14.9.2 Receive Carrier Reacquisition ...........................................................................................14–26
14.9.3 AGC Output .......................................................................................................................14–26
14.9.4 Doppler Tracking Performance..........................................................................................14–26
14.10 Interface Specifications .......................................................................................... 14–27
14.10.1 TX Clock Switching Due to Failure of Selected Clock...................................................14–27
14.10.2 TX Clock Phase Adjustment..........................................................................................14–27
14.10.3 TX Data Phase Adjustment ...........................................................................................14–27
14.10.4 Transmit Clock Source ..................................................................................................14–27
14.10.5 Send Clock Timing Source ............................................................................................14–27
14.10.6 Doppler/Plesiochronous Buffer Clock Source ...............................................................14–28
14.10.7
RX Clock Switching Due to Failure of Selected Clock ..................................................14–28
14.10.8 RX Clock Phase Adjustment .........................................................................................14–28
14.10.9 RX Clock Jitter...............................................................................................................14–28
14.10.10 RX Data Phase Adjustment...........................................................................................14–28
14.10.11 Buffer Centering.............................................................................................................14–28
14.10.12 Receive Doppler/Plesiochronous Buffer Size................................................................14–29
14.10.13 Switch Faults .................................................................................................................14–29
14.11 Decoding .................................................................................................................. 14–29
14.11.1 BPSK Decoding.............................................................................................................14–29
14.11.2 QPSK Decoding.............................................................................................................14–29
14.11.3 OQPSK Decoding (Optional).........................................................................................14–30
14.11.4 8PSK Decoding .............................................................................................................14–30
14.12 Terrestrial Interface Types...................................................................................... 14–31
14.12.1 EIA-232 Specification ....................................................................................................14–31
14.12.2 V.35 Specification V.10, V.11 Specification, Circuit Supported ....................................14–32
14.12.3 EIA-449/EIA-422 Mil-188-114A Specification................................................................14–33
14.12.4 Optional G.703 with ASYNC (Requires optional Overhead Card) ................................14–33
14.13 Asynchronous Overhead Specification (Optional) .............................................. 14–34
14.13.1 Asynchronous Baud Rates ............................................................................................14–35
14.13.2 Asynchronous
Overhead Data Format..........................................................................14–35
14.13.3 Asynchronous Overhead Parameters ...........................................................................14–35
14.13.4 AUPC with Reed-Solomon Option.................................................................................14–35
14.13.5 Turbo AUPC ..................................................................................................................14–36