Comtech EF Data SNM-1001L Installation And Operation Manual page 12

SNM-1001L Satellite Modem
Preface
A.5.11 Interleaver (Reed-Solomon Codec)...................................................................................... A-9
A.5.12 Modulator Transmit Frequency (IF) .................................................................................... A-9
A.5.13 Transmit Frequency Change Time....................................................................................... A-9
A.5.14 Modulator Transmit IF Output Switch................................................................................. A-9
A.5.15 Modulator Transmit IF Power.............................................................................................. A-9
A.5.16 Modulator Power Offset..................................................................................................... A-10
A.5.17 Modulator I / Q Imbalance................................................................................................. A-10
A.5.18 Modulator Output Noise Floor........................................................................................... A-10
A.5.19 Modulator Spectrum Rotation............................................................................................ A-10
A.5.20 Modulator Output Return Loss .......................................................................................... A-10
A.5.21 L-Band ODU Reference Signal ......................................................................................... A-10
A.5.22 L-Band ODU Control and Monitor.................................................................................... A-10
A.5.23 Modulator Transmit IF Test Modes ................................................................................... A-10
A.5.24 L-Band ODU Supply Voltage............................................................................................ A-11
A.5.25 ODU DC Current Sense..................................................................................................... A-11
A.6 Encoding ................................................................................................................................... A-11
A.6.1 BPSK Encoding ................................................................................................................. A-11
A.6.2 OQPSK Encoding .............................................................................................................. A-12
A.6.3 8-PSK Encoding................................................................................................................. A-12
A.7 L-Band Demodulator Specifications ...................................................................................... A-13
A.7.1 Digital Data Rate................................................................................................................ A-13
A.7.2 Demodulation and FEC Decoding Types .......................................................................... A-14
A.7.3 Descrambling Types .......................................................................................................... A-15
A.7.4 Differential Decoder .......................................................................................................... A-15
A.7.5 BPSK Bit Ordering ............................................................................................................ A-15
A.7.6 Deinterleaver (Reed-Solomon Codec) ............................................................................... A-15
A.7.7 Demodulator Spectrum Rotation ....................................................................................... A-15
A.7.8 Receive Frequency............................................................................................................. A-16
A.7.9 Input Overload ................................................................................................................... A-16
A.7.10 Demodulator Input Return Loss......................................................................................... A-16
A.7.11 LNB Prime Power.............................................................................................................. A-16
A.7.12 LNB Band Control............................................................................................................. A-16
A.7.13 LNB Reference Signal ....................................................................................................... A-16
A.7.14 Receive Input Power (Composite) ..................................................................................... A-17
A.7.15 Demodulator Input Shape .................................................................................................. A-17
A.7.16 Receive Input Power (Desired Carrier).............................................................................. A-18
A.7.17 Demodulator Channel Spacing/Adjacent Carrier Performance ......................................... A-18
A.8 Bit Error Rate Performance ................................................................................................... A-19
A.8.1 Performance With Noise, Viterbi Decoder, and Closed Network ..................................... A-19
A.8.2 Performance with Noise, Viterbi Decoder, and Reed-Solomon (Optional).................... A-19
A.8.3 Performance With BPSK and {O}QPSK BER Performance ............................................ A-19
A.8.4 Performance with Noise Turbo Product Codec (Optional)................................................ A-20
A.8.5 Performance With Noise, 1544 kbps Sequential Decoder and Reed Solomon(Optional) A-20
A.8.6 Performance With Noise, 56 kbps Sequential Decoder (Optional) ................................... A-20
A.8.7 Performance With Noise, 1544 kbps Sequential Decoder (Optional) ............................... A-21
A.8.8 BER Threshold................................................................................................................... A-21
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MN/SNM1001L.IOM