Comtech EF Data SDM-300A, Installation And Operation Manual

Page: 10 / 398

Preface SDM-300A
viii Rev. 4
C.2.8 Frequency Reference...........................................................................................................................C–8
C.2.9 Transmit Frequency Change Time ......................................................................................................C–8
C.2.10 Phase Noise.....................................................................................................................................C–8
C.2.11 Transmit IF Output Switch .............................................................................................................C–9
C.2.12 Transmit IF Power ..........................................................................................................................C–9
C.2.13 Modulator Power Offset .................................................................................................................C–9
C.2.14 Modulated IF Output Shape............................................................................................................C–9
C.2.15 Spurious Emissions.........................................................................................................................C–9
C.2.16 Modulator Phase Error..................................................................................................................C–10
C.2.17 Transmit IF Test Modes................................................................................................................C–10
C.2.18 Modulator Spectrum Rotation The operator can select Normal or Inverted spectrum of the of the
Modulator Output. ..............................................................................................................................................C–10
C.2.19
Encoding .......................................................................................................................................C–10
C.2.19.1 BPSK Encoding........................................................................................................................C–10
C.2.19.2 QPSK Encoding .......................................................................................................................C–10
C.2.19.3 OQPSK Encoding.....................................................................................................................C–11
C.2.19.4 8PSK Encoding ........................................................................................................................C–11
C.3 Demodulator Specifications ............................................................................................................... C–12
C.3.1 Digital Data Rate...............................................................................................................................C–12
C.3.2 Demodulation and FEC Decoding Types..........................................................................................C–13
C.3.3 Descrambling Types..........................................................................................................................C–14
C.3.4 Differential Decoder..........................................................................................................................C–14
C.3.5 BPSK Bit Ordering ...........................................................................................................................C–14
C.3.6 Decoding ...........................................................................................................................................C–14
C.3.6.1 BPSK Encoding........................................................................................................................C–14
C.3.6.2 QPSK Encoding .......................................................................................................................C–15
C.3.6.3 OQPSK Encoding.....................................................................................................................C–15
C.3.6.4 8PSK Encoding ........................................................................................................................C–15
C.3.7 Demodulator (Reed-Solomon Codec) ...............................................................................................C–16
C.3.8 Demodulator Spectrum Rotation.......................................................................................................C–16
C.3.9 Receive Frequency (IF).....................................................................................................................C–16
C.3.10 Receive Input Power (Desired Carrier).........................................................................................C–16
C.3.11 Receive Input Power (Composite) ................................................................................................C–16
C.3.12 IF Input Overload .........................................................................................................................C–16
C.3.13 Demodulator IF Input Shape.........................................................................................................C–17
C.3.14 Channel Spacing/Adjacent Carrier Performance ..........................................................................C–17
C.4 BER Performance Specifications ...................................................................................................... C–18
C.4.1 Performance with Noise, Viterbi Decoder, and Open Network Mode..............................................C–19
C.4.2 Performance with Noise, Viterbi Decoder, and Closed Network......................................................C–21
C.4.3 Performance with Noise, Viterbi Decoder, and Reed-Solomon (Optional) ......................................C–23
C.4.4 Performance with Noise, 56 kbit/s and Sequential Decoder (Optional)............................................C–25
C.4.5 Performance with Noise, 1544 kbit/s and Sequential Decoder (Optional)........................................C–27
C.4.6 Performance with Noise at 1544 kbit/s, Sequential Decoder, and Reed-Solomon (Optional) ..........C–29
C.4.7 8PSK Performance with Noise and With/Without Reed-Solomon ...................................................C–31
C.4.8 Performance with Noise, Viterbi Decoder, and OQPSK...................................................................C–33
C.4.9 Performance with Noise, Uncoded (1/1) BPSK, QPSK, and OQPSK ..............................................C–35
C.4.10 BER Threshold .............................................................................................................................C–35
C.5 Acquisition Time................................................................................................................................. C–37
C.5.1 Receive IF Carrier Acquisition Range ..............................................................................................C–37
C.5.2 Receive IF Carrier Reacquisition ......................................................................................................C–37
C.5.3 AGC Output ......................................................................................................................................C–38