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DMD1050 Satellite Modem Board Theory of Operation
The interface sends out another pause frame with the pause time set to zero as soon as free buffer
space becomes available.
3.7.1.5 Ethernet Daisy Chain
When disabled, Port 2 on the Ethernet Data Interface operates normally. Data received on Port 2
that is not addressed to other equipment on the LAN side, is transmitted over the satellite.
When Port 2 is selected for Daisy Chain, any data received on Port 2 is forwarded to of the other
LAN side ports (Ports 1) and is not transmitted over the satellite. This is extremely useful in a
point-to -multipoint configuration as illustrated in Figure 3-5.
3.7.1.6 Ethernet QOS Type
When Normal QOS is selected, the interface determines a packets priority based on the
following:
� IEEE 803.3ac Tag when present
� IPv4 Type of Service / Differentiated Services Field
� Ipv6 Traffic Class
When Port Based QOS is selected, the interface determines the priority of a packed based upon
the port on which it arrived.
� Port 1 (JS1) has the highest priority
� Port 2 (JS2) has the second highest priority
3.7.1.7 Ethernet QOS Queue
When Fair Weighted queuing is selected, the interface transmits packets at a rate of 8, 4, 2, and 1
from the highest priority queue to the lowest respectively. With fair weighted queuing, all queues
with data in them are guaranteed to receive some bandwidth.
When Strict Priority is selected, the interface transmits packets from the highest priority queue
until it is empty. It then begins transmitting data from the next highest priority queue. If higher
priority data arrives, the interface finishes the current packet and then goes back to transmitting
packets from the higher priority queue until it is again empty. Care must be taken when selecting
Strict Priority, as it is entirely possible for the lower priority queues to be stalled indefinitely.
MN-DMD1050 3–11
Revision 9
- DMD1050 1
- Table of Contents 5
- PREFACE 11
- Warranty Policy 12
- Limitations of Warranty 12
- Exclusive Remedies 13
- Customer Support 14
- Chapter 1. Introduction 15
- 1.2 DMD1050 Configurations 16
- 1.2.2 Feature Upgrades 16
- 1.3 Function Accessibility 16
- Chapter 2. Installation 17
- 2.2 Unpacking 18
- 2.3 Removal and Assembly 18
- MN-DMD1050 2–3 19
- 2.6 Modulator Checkout 20
- 2.6.1 Initial Power-Up 20
- MN-DMD1050 2–5 21
- 2.7 Storage 22
- 3.1 DMD1050 Hardware 23
- MN-DMD1050 3–2 24
- MN-DMD1050 3–3 25
- 3.2.1 Baseband Processing 26
- MN-DMD1050 3–5 27
- 3.3.2 Terminal Mode Control 28
- MN-DMD1050 3–7 29
- 3.3.6 Terminal Screens 30
- MN-DMD1050 3–10 32
- 3.7.1.6 Ethernet QOS Type 33
- 3.7.1.7 Ethernet QOS Queue 33
- MN-DMD1050 3–12 34
- 3.7.1.9 Packet Statistics 35
- 3.8 Internal Clock 35
- MN-DMD1050 3–15 37
- MN-DMD1050 3–16 38
- 3.10.1 TX Clock Options 39
- 3.10.3 RX SAT Clock 41
- 3.12 Reed-Solomon Codec 42
- 3.12.3 Interleaving 43
- 3.13.1 Radyne AUPC 44
- 3.13.2 EF AUPC 45
- 3.13.3 Near Side AUPC 45
- MN-DMD1050 3–25 47
- MN-DMD1050 3–26 48
- MN-DMD1050 3–27 49
- MN-DMD1050 3–28 50
- 3.17.1 SCC Framing Structure 51
- 3.17.2 Aggregate Data Rate 52
- MN-DMD1050 3–31 53
- Example 1: 54
- Example 2: 54
- MN-DMD1050 3–33 55
- MN-DMD1050 3–34 56
- 3.19 Strap Codes 57
- MN-DMD1050 3–36 58
- 4.1 DMD1050 Connections 59
- MN-DMD1050 4–2 60
- MN-DMD1050 4–3 61
- MN-DMD1050 4–4 62
- MN-DMD1050 4–5 63
- MN-DMD1050 4–6 64
- MN-DMD1050 4–7 65
- MN-DMD1050 4–8 66
- MN-DMD1050 4–9 67
- MN-DMD1050 4–10 68
- CAUTION 69
- 5.2.1 Alarm Faults 70
- 5.2.1.1 Major Tx Alarms 70
- 5.2.1.2 Major Rx Alarms 70
- 5.2.1.3 Minor Tx Alarms 70
- 5.2.1.4 Minor Rx Alarms 71
- 5.2.1.5 Common Major Alarms 71
- 5.2.2 Alarm Masks 71
- Chapter 6. Technical 73
- Specifications 73
- MN-DMD1050 6–2 74
- 6.9.1 Non-DVB 75
- 6.9.2 DVB 76
- MN-DMD1050 6–5 77
- Viterbi 78
- Sequentia 79
- Trellis 81
- Viterbi Decoder 83
- MN-DMD1050 6–12 84
- MN-DMD1050 6–13 85
- MN-DMD1050 6–14 86
- MN-DMD1050 6–15 87
- MN-DMD1050 6–16 88
- MN-DMD1050 6–17 89
- 6.10.11 ACG Output Voltage 90
- Chapter 7. Web Browser 91
- 7.2.1 Appearance 92
- 7.2.2 Navigation 92
- 7.2.3 LED Indicators 93
- 7.3 GUI Screen Menus 94
- 7.3.1 Introduction Menu 95
- 7.3.1.1 Login Screen 96
- 7.3.2 Password Setup 97
- MN-DMD1050 7–8 98
- MN-DMD1050 7–9 99
- MN-DMD1050 7–10 100
- Revision 9 100
- MN-DMD1050 7–11 101
- MN-DMD1050 7–12 102
- Configuring the PC 103
- 7.3.4.1 Transmit Menu 104
- MN-DMD1050 7–15 105
- MN-DMD1050 7–16 106
- MN-DMD1050 7–17 107
- MN-DMD1050 7–18 108
- MN-DMD1050 7–19 109
- MN-DMD1050 7–20 110
- MN-DMD1050 7–21 111
- 7.3.4.2 Receive Menu 112
- MN-DMD1050 7–23 113
- MN-DMD1050 7–24 114
- MN-DMD1050 7–25 115
- MN-DMD1050 7–26 116
- MN-DMD1050 7–27 117
- 7.3.4.3 Interface Menu 118
- MN-DMD1050 7–29 119
- MN-DMD1050 7–30 120
- MN-DMD1050 7–31 121
- MN-DMD1050 7–32 122
- 7.3.4.4 Monitor Menu 123
- MN-DMD1050 7–34 124
- MN-DMD1050 7–35 125
- MN-DMD1050 7–36 126
- 7.3.4.5 Alarms Menu 127
- MN-DMD1050 7–38 128
- MN-DMD1050 129
- MN-DMD1050 7–40 130
- MN-DMD1050 7–41 131
- MN-DMD1050 7–42 132
- MN-DMD1050 7–43 133
- 7.3.4.5.1 System Menu 134
- MN-DMD1050 7–45 135
- MN-DMD1050 7–46 136
- 7.3.4.6 Test Menu 137
- Test Pattern 137
- MN-DMD1050 7–48 138
- A.1 Hardware Options 139
- A.2 Internal High-Stability 139
- A.3 Customized Options 139
- MN-DMD1050 A–2 140
- B.1 States 141
- B.2 Carrier Off 141
- B.3 Carrier On 141
- B.4 Carrier Auto 141
- B.5 Carrier VSat 142
- B.6 Carrier RTS 142
- Appendix C. TCP/IP Ethernet 143
- IMPORTANT 144
- C.4 Ethernet Test 145
- MN-DMD1050 C–4 146
- MN-DMD1050 C–5 147
- MN-DMD1050 C–6 148
- MN-DMD1050 C–7 149
- MN-DMD1050 C–8 150
- Appendix D. Web Browser 151
- Setup Guide 151
- MN-DMD1050 D–2 152
- MN-DMD1050 D–3 153
- D.4.1 Configuring the modem 154
- MN-DMD1050 D–5 155
- MN-DMD1050 D–6 156
- MN-DMD1050 D–7 157
- MN-DMD1050 D–8 158
- Appendix E.User Interface 159
- Connections 159
- MN-DMD1050 E–3 161
- 08-56-0106 162
- Appendix F.Ethernet Data 163
- Interface 163
- MN-DMD1050 F–2 164
- MN-DMD1050 F–3 165
- MN-DMD1050 F–4 166
- Figure F-4 – High Speed Mesh 167
- MN-DMD1050 F–6 168
- MN-DMD1050 F–7 169
- Prioritized Queues 170
- F.8.1 Normal QOS 171
- F.8.2 Port Based QOS 171
- F.8.3 Fair Weighted Queuing 171
- MN-DMD1050 F–10 172
- MN-DMD1050 F–12 174
- Appendix G. DMD1050 Strap 175
- Dis = Disable 176
- Procedure 179
- MN-DMD1050 H–2 180
- MN-DMD1050 H–3 181
- H.8 Monitor and Control 182
- METRIC CONVERSIONS 183
- Units of Length 183
- Temperature Conversions 183
- Units of Weight 183
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