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SDM-309B Satellite Modem M&C and Interfaces

MN/U-SDM309B Rev. # 4-4–27

of the events which cause a secondary alarm. The modem may be interrogated from the

front panel or using the RS-485 or RS-232 interface to identify the cause of the alarm.

1 2 ... 99 100 101 102 103 104 105 106 107 108 109 ... 239 240

SDM-309B 1
SDM-309BSDM-309B 1
Warranty Policy 3
Limitations of Warranty 3
Exclusive Remedies 3
Disclaimer 3
About this Manual 4
Cautions and Warnings 4
Metric Conversion 4
Trademarks 5
Customer Support 6
Table of Contents 8
Rev. 0 vii 10
Rev. 0 ix 12
Chapter 1 14
INTRODUCTION 14
1-1–2 MN/U-SDM309B Rev. # 15
Figure 1-1 SDM-309B Modem 16
1-1–4 MN/U-SDM309B Rev. # 17
MN/U-SDM309B Rev. # 1-1–5 18
1-1–6 MN/U-SDM309B Rev. # 19
1.4 System Specification 20
1-1–10 MN/U-SDM309B Rev. # 23
MN/U-SDM309B Rev. # 1-1–11 24
1-1–12 MN/U-SDM309B Rev. # 25
Chapter 2 26
INSTALLATION 26
Figure 2-1 Rear Panel View 28
2.2.1 Data I/O 29
2.2.2 Remote (J6) 29
2.2.3 Fault (J7) 29
2.2.4 IF Output (CP1) 30
2.2.5 IF Input (CP2) 30
2.2.6 AC Power 30
2.2.7 GND 30
2.3 System Requirements 30
2.4 System Installation 31
Chapter 3 32
OPERATION 32
3.1.3 Front Panel Controls 33
Figure 3-1 Front Panel View 34
3.1.4 Configuration 35
3.1.4.1 MOD Configuration 35
3.1.4.2 DEMOD Configuration 36
3.1.5 Monitor 41
3.1.6 Faults 41
3.1.7 Stored Faults 43
3.1.8 Utility 43
Figure 3-2 Menu Tree 47
Figure 3-3 Menu Tree 48
Figure 3-4 Menu Tree 49
Figure 3-5 Menu Tree 50
Figure 3-6 Menu Tree 51
Figure 3-7 Menu Tree 52
Figure 3-8 IF Loopback 53
Figure 3-9 RF Loopback 54
3–24 MN/U-SDM309B Rev. # 55
MN/U-SDM309B Rev. # 3–25 56
3.2.1 General 57
3.2.2 Configuration 57
3.2.2.1 MOD Configuration 58
3.2.2.2 DEMOD Configuration 59
3.2.3 Monitor 65
3.2.4 Faults 66
3.2.5 Stored Faults 67
3.2.6 Utility 68
Figure 3-12 Menu Tree 71
Figure 3-13 Menu Tree 72
Figure 3-14 Menu Tree 73
Figure 3-15 Menu Tree 74
Figure 3-16 Menu Tree 75
Figure 3-17 Menu Tree 76
3–46 MN/U-SDM309B Rev. # 77
Chapter 4 78
M&C AND INTERFACES 78
Connect JP7 to RS232 79
MN/U-SDM309B Rev. # 4-4–3 80
4.1.2.2 Remote Baud Rate 81
4.1.2.3 Remote Address 81
4.1.2.4 Battery 81
4.1.2.8 Utility Defaults 83
4.2 Digital Interfaces 83
4.2.1 IBS/M1200P Interface 84
4.2.1.2 Data Interface 84
4.2.1.3 Transmit Multiplexer 84
4-4–8 MN/U-SDM309B Rev. # 85
MN/U-SDM309B Rev. # 4-4–9 86
4-4–10 MN/U-SDM309B Rev. # 87
Figure 4-4 IBS Fault Tree 88
Figure 4-5 Jumper Table 89
4.2.1.4 Receive Multiplexer 90
4-4–18 MN/U-SDM309B Rev. # 95
4.2.1.9.7 Send Data (J7) 98
4.2.1.9.8 Receive Data (J8) 99
MN/U-SDM309B Rev. # 4-4–23 100
4-4–24 MN/U-SDM309B Rev. # 101
4.2.2.2 Data Interface 102
4.2.2.3 Transmit Multiplexer 102
4.2.2.7 Backward Alarm 103
MN/U-SDM309B Rev. # 4-4–27 104
4-4–28 MN/U-SDM309B Rev. # 105
MN/U-SDM309B Rev. # 4-4–29 106
4-4–30 MN/U-SDM309B Rev. # 107
MN/U-SDM309B Rev. # 4-4–31 108
MN/U-SDM309B Rev. # 4-4–35 112
4.2.2.10.11 Faults (J11) 115
4.2.2.11 Rear Panel Switches 116
4.2.2.11.1 Drop Data Input 116
4.2.2.11.2 Drop Data Output 116
4.2.2.11.3 Insert Data Input 116
4-4–40 MN/U-SDM309B Rev. # 117
MN/U-SDM309B Rev. # 4-4–41 118
Table 4-3 119
MN/U-SDM309B Rev. # 4-4–43 120
4-4–44 MN/U-SDM309B Rev. # 121
4.3.1 Master/Slave 122
4.3.1.2 Master/Slave G.703 123
4.3.1.3 Master/Slave X.21 123
4.3.2 Master/Master 123
Chapter 5 125
THEORY OF OPERATION 125
Figure 5-1 Modulator Card 127
5-5–4 MN/U-SDM309B Rev. # 128
MN/U-SDM309B Rev. # 5-5–5 129
5.1.3 Theory of Operation 130
5.2.1 General Description 131
MN/U-SDM309B Rev. # 5-5–9 133
5-5–10 MN/U-SDM309B Rev. # 134
MN/U-SDM309B Rev. # 5-5–11 135
5-5–12 MN/U-SDM309B Rev. # 136
MN/U-SDM309B Rev. # 5-5–13 137
5.2.3 Theory Of Operation 138
5.2.3.1 Demod Processor 138
5.2.3.2 Viterbi Decoder 138
5.3 Demodulator 139
5.3.1 General Description 139
5.3.2 Specifications 140
Figure 5-9 Demodulator Card 141
5-5–18 MN/U-SDM309B Rev. # 142
5.3.3 Theory of Operation 143
5.4.1 General 143
5.4.2 Reacquisition 144
5.4.3 Fast Acquisition 145
5.4.4 Directed Sweep 145
Chapter 6 146
MAINTENANCE 146
6-6–2 MN/U-SDM309B Rev. # 147
MN/U-SDM309B Rev. # 6-6–3 148
6-6–4 MN/U-SDM309B Rev. # 149
Table 6-1 150
6-6–6 MN/U-SDM309B Rev. # 151
MN/U-SDM309B Rev. # 6-6–7 152
6.1.4 Test Points 153
Figure 6-6 154
Figure 6-7 155
Figure 6-8 156
Figure 6-9 157
6.2 Fault Isolation 158
6.2.1 Modulator Faults 158
6.2.2 Demodulator Faults 159
Table 6-2 162
6-6–18 MN/U-SDM309B Rev. # 163
MN/U-SDM309B Rev. # 6-6–19 164
6-6–20 MN/U-SDM309B Rev. # 165
MN/U-SDM309B Rev. # 6-6–21 166
6.4 Module Replacement 167
6.5 Module Identification 167
6.6 Repacking For Shipment 167
Table 6-3 168
Appendix A 169
DATA RATES AND FILTERS 169
1.2 Variable Rate Filters 170
MN/U-SDM309B Rev. # A–3 171
A–4 MN/U-SDM309B Rev. # 172
MN/U-SDM309B Rev. # A–5 173
A–6 MN/U-SDM309B Rev. # 174
MN/U-SDM309B Rev. # A–7 175
A–8 MN/U-SDM309B Rev. # 176
MN/U-SDM309B Rev. # A–9 177
Appendix B 178
SATELLITE MODEM REMOTE 178
3.4 End Character 179
3.1 Start Character 179
3.2 Device Address 179
3.3 Command/Responses 179
4.2.2 Demodulator Rate 183
4.2.4 RF Loop-back (ON/OFF) 184
4.2.5 IF Loop-back (ON/OFF) 184
4.2.7 Sweep Reacquisition 185
4.2.8 Fast Acquisition Mode 185
4.2.9 Sweep Center Frequency 185
4.2.10 Sweep Width Range 186
4.2.11 Sweep Direction 186
4.3.12 Interface Buffer Size 188
4.3.13 Transmit Data Fault 189
4.3.14 Receive Data Fault 189
4.3.15 Drop Data Format 189
4.3.16 Insert Data Format 189
4.4.1 Time Of Day 191
4.4.2 Date 191
5.3 Modulator Status 195
5.4 Demodulator Status 195
5.5 Common Equipment Status 196
5.8 Bit Error Rate Status 197
5.8.1 Raw BER 197
5.8.2 Corrected BER 197
5.8.3 Corrected BER Log 197
5.9 Eb/N0 Status 198
5.10 Modulator Rate Status 198
5.11 Demodulator Rate Status 198
5.13 Current Sweep Value 199
5.16 Stored Faults 199
MN/U-SDM309B Rev. # B-B–23 200
B-B–28 MN/U-SDM309B Rev. # 205
5.20 Change Status 206
5.21 Equipment Type 206
B-B–30 MN/U-SDM309B Rev. # 207
Appendix C 208
EXTERNAL CHANNEL UNIT 208
C-C–2 MN/U-SDM309B Rev. # 209
MN/U-SDM309B Rev. # C-C–3 210
C-C–4 MN/U-SDM309B Rev. # 211
MN/U-SDM309B Rev. # C-C–5 212
C-C–6 MN/U-SDM309B Rev. # 213
MN/U-SDM309B Rev. # C-C–7 214
C-C–8 MN/U-SDM309B Rev. # 215
MN/U-SDM309B Rev. # C-C–9 216
C-C–10 MN/U-SDM309B Rev. # 217
2.0 Digital Interfaces 218
2.1.1 Functional Description 218
C-C–12 MN/U-SDM309B Rev. # 219
MN/U-SDM309B Rev. # C-C–13 220
C-C–14 MN/U-SDM309B Rev. # 221
2.1.2 Connector Pinouts 223
2.1.3 Specification 223
2.2 V.35 Interface 224
2.2.1 Functional Description 224
MN/U-SDM309B Rev. # C-C–19 226
C-C–20 MN/U-SDM309B Rev. # 227
2.2.2 Connector Pinouts 228
2.2.3 Specification 228
3.0 Front Panel Operation 229
3.1 Configuration 229
3.2 Monitor 232
3.3 Faults 232
3.4 Stored Faults 233
3.5 Utility 233
Figure C-13 Menu Tree 235
Figure C-14 Menu Tree 236
Figure C-15 Menu Tree 237
MN/U-SDM309B Rev. # C-C–31 238
Appendix D 239
SOFTWARE CHANGE 239
SPECIFICATIONS 239

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