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

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SDM-300A Preface
Rev. 4 v
4.1.3 Remote Address .................................................................................................................................. 4–4
4.2 Modulator ................................................................................................................................................... 4–5
4.2.1 Modulator Specifications .................................................................................................................... 4–6
4.2.2 Theory of Operation ............................................................................................................................ 4–6
4.2.3 Theory of Modulation Types............................................................................................................... 4–8
4.3 Demodulator............................................................................................................................................... 4–9
4.3.1 Demodulator Specifications .............................................................................................................. 4–10
4.3.2 Theory of Operation .......................................................................................................................... 4–10
4.4 Decoder ..................................................................................................................................................... 4–12
4.5 Interface.................................................................................................................................................... 4–13
4.5.1 Interface Specifications ..................................................................................................................... 4–15
4.5.2 Plesiochronous/Doppler/Buffer......................................................................................................... 4–15
4.5.3 Closed Network................................................................................................................................. 4–16
4.5.4 Open Network ................................................................................................................................... 4–16
4.6 Backward Alarm Theory and Connections ........................................................................................... 4–17
CHAPTER 5. MAINTENANCE....................................................................................5–1
5.1 System Checkout........................................................................................................................................ 5–1
5.1.1 Interface Checkout .............................................................................................................................. 5–2
5.1.2 Modulator Checkout............................................................................................................................ 5–3
5.1.3 Demodulator Checkout ....................................................................................................................... 5–6
5.2 Fault Isolation ............................................................................................................................................ 5–8
5.2.1 System Faults/Alarms ......................................................................................................................... 5–8
5.2.2 Faults/Alarms Display....................................................................................................................... 5–12
5.2.3 Faults/Alarms Analysis ..................................................................................................................... 5–12
5.2.3.1 Modulator Faults ...................................................................................................................... 5–13
5.2.3.2 Demodulator Faults .................................................................................................................. 5–14
5.2.3.3 Transmit Interface Faults.......................................................................................................... 5–15
5.2.3.4 Receive Interface Faults ........................................................................................................... 5–16
5.2.3.5 Common Equipment Faults ...................................................................................................... 5–18
5.2.3.6 Backward Alarms Faults .......................................................................................................... 5–19
APPENDIX A. OPTIONS ........................................................................................... A–1
A.1 FAST Accessible Options ..................................................................................................................... A–2
A.1.1 FAST System Theory......................................................................................................................... A–3
A.1.2 Implementation .................................................................................................................................. A–3
A.1.2.1 Activation Procedure ................................................................................................................. A–3
A.1.3 D&I .................................................................................................................................................... A–7
A.1.3.1 D&I Specifications .................................................................................................................... A–8
A.1.3.2 Theory of Operation ................................................................................................................ A–12
A.1.3.2.1 Data Interference................................................................................................................. A–12
A.1.3.2.2 Transmitted MUX ............................................................................................................... A–12
A.1.3.2.3 Receive DEMUX ................................................................................................................ A–13
A.1.3.2.4 Plesiochronous Buffer......................................................................................................... A–13
A.1.3.2.5 Engineering Service Channel (ESC) ................................................................................... A–14