Comtech EF Data SDM-300A Installation And Operation Manual page 7

SDM-300A
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
Rev. 4
Preface
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