Comtech EF Data SNM-1001L - Manual (Page 14)

SNM-1001L Satellite Modem Revision 1
Preface MN/SNM1001L.IOM
ix
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/Response................................................................................................................... B–3
B.2.4 End Character............................................................................................................................. B–4
B.3 Configuration Commands/Responses............................................................................................ B–5
B.3.1 Modulator Configuration Commands ........................................................................................ B–5
B.3.2 Demodulator Configuration Commands .................................................................................... B–7
B.3.3 Interface Configuration Commands ........................................................................................... B–9
B.3.4 System Configuration Commands............................................................................................ B–11
B.3.5 Automatic Uplink Power Control (AUPC) .............................................................................. B–12
B.4 Status Commands/Responses ....................................................................................................... B–14
B.4.1 Modulator Configuration Status............................................................................................... B–14
B.4.3 ODU Configuration Status................................................................................................ B–19
B.4.4 Fault Status........................................................................................................................ B–20
B.4.2 Error Performance .................................................................................................................... B–21
B.5 Stored Faults.................................................................................................................................. B–24
APPENDIX C. BURST MODE MODULATOR OPERATION .............................................. C–1
C.1 Burst Mode Modulator: Theory of Operation ........................................................................ C–1
C.1.1 Burst Mode........................................................................................................................... C–1
C.2 Burst Mode Modulator: Specifications .................................................................................... C–2
C.2.1 Digital Data Rate.................................................................................................................. C–2
C.2.2 Modulation and Encoding Types ......................................................................................... C–2
C.2.3 Scrambling Types ................................................................................................................ C–3
C.2.4 Differential Encoder............................................................................................................. C–3
C.2.5 Transmit Frequency (IF) ...................................................................................................... C–3
C.2.6 Frequency Reference............................................................................................................ C–3
C.2.7 Transmit Frequency Change Time....................................................................................... C–3
C.2.8 Phase Noise.......................................................................................................................... C–4
C.2.9 Transmit IF Output Switch .................................................................................................. C–4
C.2.10 Transmit IF Power ............................................................................................................... C–4
C.2.11 Modulator Power Offset....................................................................................................... C–4
C.2.12 Modulated IF Output Shape................................................................................................. C–4
C.2.13 Spurious Emissions.............................................................................................................. C–5
C.2.14 Modulator Phase Error ......................................................................................................... C–5
C.2.15 Transmit IF Test Modes....................................................................................................... C–5
C.2.16 Modulator Spectrum Rotation.............................................................................................. C–5
C.2.17 Transmit Preamble ............................................................................................................... C–6
C.2.18 Transmit Packet ................................................................................................................... C–6
C.2.19 Transmit Postamble ............................................................................................................. C–6