Comtech EF Data DMD-2050E Spécifications Page 56
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- Table des matières
- DEPANNAGE
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
DMD2050E Universal Satellite Modem Theory of Operation
MN-DMD2050E Revision 2 3–14
SD
TT
Tx CLK
SRC
High Stability
Oscillator
ST
CLOCK &
DATA
EXT REF
EXTERNAL
INTERNAL
SCT CLK
SRC
REF FREQ
SRC
SCT
SCTE
TRANSMIT
RECEIVE
CLOCK & DATA
RECOVERY
EXT CLK
EXT BNC
SCT
SCTE
RX SAT
RT
RD
SCR
BUFFER CLK
SRC
CLOCK
RECOVERY
EXT IDI
IDI
MODULATION
HIGH STABILITY
DEMODULATION
J19
J19
J10
J16
J8
CLK POL
DATA POLARITY
NORMAL
INVERTED
AUTO
INV. TERR&BASE
INVERT NONE
INV. BASEBAND
INV. TERR DATA
DATA POLARITY
BUFFER CLK POL
NORMAL
INVERTED
INV. TERR&BASE
INVERT NONE
INV. BASEBAND
INV. TERR DATA
Figure 3-8. Clocking and Polarity Diagram
3.5.2 TX Clock Options
TX clock options can be recovered from the terrestrial interface, satellite interface or internally
generated. The allows users to select SCTE Clock (Terrestrial) or the SCT internal clock. The
modem also allows user to recover the SCT Clock from the satellite (SCR) or from the modem
internally. The modem allows users to select clock polarity. The types of clocking options that
are available at the Front Panel include:
• SCT (Internal Oscillator)
• SCTE (External Tx Terrestrial Clock)
• Rx Satellite Clock
- DMD-2050E 1
- BLANK PAGE 10
- Table of Contents 11
- vii 15
- viii 16
- xii 20
- xiii 21
- xiv 22
- Figures 23
- xvi 24
- PREFACE 25
- Electrical Safety 26
- Battery 26
- Grounding 26
- Environmental 27
- Low Voltage Directive (LVD) 27
- CE Mark 28
- Preface MN-DMD2050E 29
- Chapter 1. Introduction 31
- 1.2 DMD2050E Configurations 32
- 1.2.1 Features 32
- 1.2.3 Bandwidth Compression 33
- 1.2.4 Interfaces 34
- 1.2.6 Compatibility 34
- 1.2.7 Physical Description 34
- Chapter 2. Installation 37
- 2.2 Installation Safety 38
- 2.3.1 Location 39
- 2.3.2 Airflow 39
- 2.3.3 Temperature 39
- 2.3.4 Electrical Power 39
- 2.3.5 Cables 40
- 2.5 Modulator Checkout 41
- 2.5.1 Initial Start Up 41
- 3.1 DMD2050E Hardware 43
- 3.2.1 Front Panel 47
- 3.2.2 Baseband Processing 47
- 3.2.6 Terminal Port 50
- 3.2.8 Ethernet M&C Port 51
- 3.2.9 Modem Monitor Status 51
- 3.3 Internal Clock 52
- 3.5.1 Clock Selection 55
- 3.5.2 TX Clock Options 56
- 3.5.3.1 RX SAT Clock 58
- Clock specification 59
- Frequency 1 MHz to 20 MHz 59
- 3.6 Transmit Timing Options 60
- 3.6.2 G.703 Interface 60
- 3.6.3 HSSI Interface 60
- 3.8 Ebem Framing Unit 62
- 3.8.2 Embedded Channel 62
- 3.9 STANAG Turbo Coding 62
- 3.10 FIPs TRANSEC Module 63
- 3.10.1.1 Key Agreement 63
- 3.10.1.2.1 Key Derivation 66
- DMD2050E 71
- DMD2050E CnC Module 71
- 3.11.6 Margin Requirements 77
- 3.11.15 Glossary 91
- 3.12.1 LDPC versus TPC 94
- 3.12.2 TPC and LDPC Summary 98
- 3.13 Reed-Solomon Codec 98
- 3.13.3 Interleaving 99
- Communications) 100
- 3.16 Standard IBS Mode 102
- 3.18 ESC Backward Alarms 103
- See also: 104
- 3.19.2 Aggregate Data Rate 106
- (less than In-Band Rate) 108
- Port labeled ASYNC (J17) 110
- Chapter 4. User Interfaces 113
- 4.2.2 Arrow Keys 114
- 4.2.3 Numeric Keys 114
- 4.2.4 LED Lights 115
- 4.3 Parameter Setup 116
- 4.3.1 Select a Parameter 116
- 4.4 Front Panel Main Menus 116
- 4.4.1.1 NETWORK SPEC (menu) 117
- 4.4.1.2 STRAP CODE 118
- 4.4.1.3 IF (menu) 118
- 4.4.1.4 DATA (menu) 118
- 4.4.1.5 REED-SOLOMON (menu) 121
- 4.4.1.6 AUPC (menu) 121
- 4.4.1.7 LOCAL AUPC (menu) 122
- 4.4.1.8 REMOTE AUPC (menu) 125
- 4.4.1.9 ITA (menu) 125
- 4.4.2.1 NETWORK SPEC (menu) 126
- 4.4.2.2 STRAP CODE 127
- 4.4.2.3 IF (menu) 127
- 4.4.2.4 DATA (menu) 128
- 4.4.2.5 REED-SOLOMON (menu) 129
- Hz) between the 130
- 4.4.3.1 TX SETUP (menu) 131
- 4.4.3.2 RX SETUP (menu) 134
- 4.4.3.3 GENERAL (menu) 136
- 4.4.4.1 LINK STATUS (menu) 137
- 4.4.4.2 VOLTAGES (menu) 139
- 4.4.4.3 CnC (menu) 139
- 4.4.4.4 ITA (menu) 139
- 4.4.6.1 FRONT PANEL (menu) 140
- 4.4.6.2 REMOTE CONTROL 140
- 4.4.6.3 TERMINAL (menu) 141
- 4.4.6.4 REMOTE PORT (menu) 141
- 4.4.6.5 TCP/IP (menu) 141
- 4.4.6.6 SNMP (menu) 143
- 4.4.6.7 FTP (menu) 144
- 4.4.6.8 WEB (menu) 144
- 4.4.6.9 TRANSEC (menu) 145
- 4.4.6.10.2 FEATURES (menu) 147
- 4.5 Terminal Mode Control 150
- 4.5.1 Terminal Mode Screens 150
- 5.1.1 Ground Connector 154
- 5.1.2 Power Switch 154
- 5.2 Front Panel Connections 155
- 5.2.1 Key Loader Interface 155
- 5.3 Rear Panel Connectors 156
- 5.3.2 EXT REF (J10) 157
- 5.3.4 ALARM (J15) 158
- 5.3.5 EXT CLK (J16) 159
- 5.3.6 ASYNC (J17) 160
- 5.3.8 MIL-188-114A (J19) 161
- Chapter 6. Maintenance and 163
- Troubleshooting 163
- 6.2 Troubleshooting 164
- 6.3 Alarms 165
- 6.3.2 Major Rx Alarms 165
- 6.3.3 Minor Tx Alarms 166
- 6.3.3.1 Minor Rx Alarms 167
- 6.4 Alarm Masks 170
- 6.4.1 Active Alarms 170
- 6.4.1.1 Major Alarms 170
- 6.4.1.2 Minor Alarms 170
- 6.4.3 Latched Alarms 171
- 6.4.4 Backward Alarms 173
- 6.5 IBS Alarms and Actions 174
- 7.1 Modulator 175
- 7.2 Demodulator 176
- 7.3 Plesiochronous Buffer 177
- 7.4 Monitor and Control 177
- 7.11 Data Rate Limits 179
- 7.11.1 Non-DVB 179
- 7.11.2 DVB 181
- 7.12 BER Specifications 183
- Sequential 184
- 184
- Viterbi Decoder Reed 185
- Turbo Decoder 186
- Trellis 187
- Viterbi 189
- Viterbi Decoder 190
- Reed Solomon 190
- LDPC Decoder 196
- MILSTD 188-165B 200
- MILSTD 188 201
- 7.13 AGC Output Voltage 208
- Appendix A. Product Options 209
- B.1 Introduction 211
- B.2 Required Equipment 211
- B.3 Procedures 211
- B.3.2 Record the Unit ID 213
- B.3.4 Install the Code 214
- Appendix C. Carrier Control 217
- C.3 Carrier States 218
- C.3.1 Carrier OFF 218
- C.3.2 Carrier ON 218
- C.3.3 Carrier AUTO 218
- C.3.4 Carrier VSAT 219
- C.3.5 CARRIER RTS 219
- Appendix D. Web Interface 221
- Setup Guide 221
- D.2.2 IP Address 222
- D.3 Web Interface Security 222
- D.3.1 Default User Accounts 222
- D.3.2 User Account Data 223
- D.1 User Account Setup 223
- D.1.1 Edit the User ID 224
- D.1.2 Edit the Access Group 224
- D.2 Reset a User Account 225
- D.3 Confirmation 225
- D.4 Equipment Website 226
- D.5 Web Page Appearance 228
- D.6.3.1 Change the encoding 233
- D.6.4.4 Change the encoding 238
- D.6.5.2 Change the encoding 241
- E.1 Introduction 243
- E.2 System Requirements 243
- E.3 Configuration Examples 244
- Figure E-1. Looped Modems 245
- E.4 Functional Descriptions 246
- E.4.1 Drop Only 246
- E.4.2 Insert Only 246
- E.4.3 Data Formats 248
- E.4.3.1 PCM-30 248
- E.4.3.2 PCM-30C 248
- E.4.3.3 PCM-31 248
- E.4.3.4 PCM-31C 249
- E.4.3.5 T1-D4/T1-D4-S 249
- E.4.3.6 T1-ESF/T1-ESF-S 249
- E.5.1 Data Rate 253
- Example 1: 255
- Example 2: 257
- E.8 Prerequisite 266
- F.1 Introduction 271
- F.4 Ethernet Test 274
- Network) 274
- Appendix G. AUPC Operation 279
- G.1.2 EF AUPC 280
- G.1.3 Near Side AUPC 280
- G.1.4 EBEM AUPC 281
- Appendix H. Ethernet Data 283
- Interface Setup 283
- H.1.1 Ethernet Flow Control 284
- H.1.2 Ethernet Daisy Chain 284
- H.1.3 Ethernet QOS Type 285
- H.1.4 Ethernet QOS Queue 285
- H.1.6 Packet Statistics 287
- Appendix I. Strap Codes 289
- I.2 Sample Applications 294
- Appendix J. ITA Operation 303
- J.1.2 Basic Setup (Example) 305
- Table J-3 - ITA Setup 313
- TRANSEC Module 333
- 480 • 333 • 2200 PHONE 342
- • 333 • 2161 FAX 342
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