Table of Contents
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SLM-3650 Satellite Modem
Preface
3.5
Software Configuration....................................................................................................................................3-78
3.6
Clocking Options ..............................................................................................................................................3-87
3.6.1
EIA-232, EIA-422, or V.35 Master/Master ...............................................................................................3-87
3.6.2
EIA-232, EIA-422, or V.35 Master/Slave .................................................................................................3-87
3.6.3
IDR/IBS G.703 Master/Master ..................................................................................................................3-88
3.6.4
IDR/IBS G.703 Master/Slave ....................................................................................................................3-88
3.6.5
D&I G.703 Master/Master.........................................................................................................................3-94
3.7
Buffering............................................................................................................................................................3-94
3.7.1
Buffer Size .................................................................................................................................................3-97
3.7.2
Converting Between Bits and Seconds ......................................................................................................3-99
CHAPTER 4 THEORY OF OPERATION.........................................................................4-1
4.1
4.1.1
Theory of Operation ..................................................................................................................................4-2
4.1.2
Remote Baud Rate .....................................................................................................................................4-4
4.1.3
Remote Address.........................................................................................................................................4-4
4.1.4
SLM-3650 Custom Modem Defaults.........................................................................................................4-5
4.2
Modulator..........................................................................................................................................................4-7
4.2.1
Modulator Specifications...........................................................................................................................4-8
4.2.2
Theory of Operation ..................................................................................................................................4-11
4.2.3
Theory of Modulation Types .....................................................................................................................4-12
4.3
Demodulator .....................................................................................................................................................4-14
4.3.1
Demodulator Specifications.......................................................................................................................4-15
4.3.2
Theory of Operation ..................................................................................................................................4-16
4.4
Decoder..............................................................................................................................................................4-18
4.5
Interface ............................................................................................................................................................4-19
4.5.1
Interface Specifications..............................................................................................................................4-21
4.5.2
Plesiochronous/Doppler/Buffer .................................................................................................................4-24
4.5.3
Closed Network .........................................................................................................................................4-25
4.5.4
Open Network............................................................................................................................................4-25
4.6
Backward Alarm Theory and Connections....................................................................................................4-26
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
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Revision 3
MN/SLM3650.IOM
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