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DMD20/20LBST Universal Satellite Modem Theory of Operation

MN-DMD20-20LBST Revision 14 3–10

Figure 3-5 Loopback Functional Block Diagram

Figure 3-6 Loopback Functional Block Diagram

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Default Chapter5
- Specifications5
- Installation and Operation Manual37
- Table of Contents39
- About this Manual49
- Related Documents49
- Safety Compliance50
- Limitations of Warranty51
- Customer Support52
Chapter 1. Introduction53
Overview53
Configurations54
- Features/Options Installed at Time of Order54
- Feature Upgrades54
- Hardware Options54
- Factory Installed Options55
Function Accessibility55
Chapter 2. Installation57
Unpacking and Inspection57
Installation Requirements58
Removal and Assembly59
Mounting Considerations59
Initial Configuration Check60
Modulator Checkout62
- Initial Power-Up62
- Factory Terminal Setup62
Chapter 3. Theory of Operation63
Modem Hardware63
- L-Band/If Printed Circuit Card64
- Baseband Processing Printed Circuit Card65
- Enhanced Interface Printed Circuit Card65
Functional Block Diagram65
- Front Panel66
- Baseband Processing66
- Tx Baseband Processing67
- Rx Baseband Processing67
Monitor & Control (M&C) Subsystem67
- Terminal Port68
- Modem Remote Communications (RLLP)68
- Ethernet M&C Port68
- Modem Monitor Status69
Async Port / ES-ES Communications69
Internal Clock69
Loopback Features (Terrestrial & IF)70
Clocking Options73
- TX Clock Options73
  - SCTE: Serial Clock Transmit External74
  - SCT: Serial Clock Transmit74
- RX Buffer Clock Options74
- EXT REF: External Reference, Top BNC Port, J1076
RS530/422/V.35 Interface (Standard)76
- Interface (Optional)76
- HSSI Interface (Optional)76
- Ethernet Data Interface (Optional)76
Reed-Solomon Codec77
- Reed-Solomon Operation77
- Reed-Solomon Code Rate77
- Interleaving78
Asynchronous Overhead Operation (Framing/Multiplexer Capability)79
Standard IBS Mode80
Asynchronous Multiplexer Mode81
ESC Backward Alarms81
- To Disable the ESC Backward Alarms81
Satellite Control Channel (SCC)81
- SCC Framing Structure82
- Aggregate Data Rate83
- Overhead Rate Comparison83
- Actual Overhead Rate Calculation84
- SCC Overhead Channel Setup85
Doubletalk Carrier-In-Carrier Option87
- What Is Doubletalk Carrier-In-Carrier87
- Application Requirements87
- Operational Recommendations90
- System Functionality and Operational Considerations91
- Doubletalk Carrier-In-Carrier Cancellation Process93
- Margin Requirements95
- Carrier-In-Carrier Latency95
- Carrier-In-Carrier Link Design95
- Carrier-In-Carrier Commissioning and Deployment101
- Validating Carrier-In-Carrier Performance102
- Operational References103
- Carrier-In-Carrier Link Budget Calculation103
- Estimating PSD Ratio104
- Glossary106
- Doubletalk Carrier-In-Carrier Specifications106
- Carrier-In-Carrier Summary106
EDMAC Satellite Framing/Deframing Mode108
Locating the ID Code Operational Procedure108
Strap Codes108
Chapter 4. User Interfaces109
User Interfaces109
Front Panel User Interface109
- LCD Front Panel Display111
- Cursor Control Arrow Keys111
- Numeric Keypad111
- Front Panel LED Indicators112
Parameter Setup112
Front Panel Control Screen Menus113
- Main Menus113
- Modulator Menu Options and Parameters114
- Demodulator Menu Options and Parameters123
- Interface Menu Options and Parameters128
- Monitor Menu Options and Parameters133
- Alarms Menu Options and Parameters136
- System Menu Options and Parameters144
- Test Menu Options and Parameters153
Terminal Mode Control155
- Modem Terminal Mode Control155
- Modem Setup for Terminal Mode155
Terminal Port User Interface156
Connecting the Terminal156
Terminal Screens156
Chapter 5. Rear Panel Interfaces157
DMD20/DMD20 LBST Connections157
Compact Flash160
Power Input Modules160
- AC Power Input Module160
DMD20 Chassis Connections (Standard)160
- Ext Ref (J10)160
- Tx if (J11)160
- TX L-Band if (J12)160
- Rx if161
- RX L-Band if161
- Alarm (J15)161
- Ext Clk (J16)162
- Async (J17)162
- J18162
- J19)163
- Remote (J20)164
- Ethernet (J21)164
DMD20 LBST Chassis Connections (Standard)165
- Ext Ref (J10)165
- Tx (J11)165
- Rx (J14)165
- Alarm (J15)165
- Ext Clk (J16)166
- Async (J17)166
- J18)166
- J19)167
- Remote (J20)168
- Ethernet (J21)168
DMD20/DMD20 LBST Optional Data Interfaces168
IDR/IBS Interface (Optional)169
- Esc Alarm (J1)169
- Audio (J2)170
- Data (J3)171
- Bal (J4)172
- Switch Interface (J5)173
- Sd (DDI) (J6)176
- Ddo (J7)176
- IDI (J8)176
- Sd (Ido) (J9)176
Ethernet Data Interface (Optional)176
High-Speed Serial Interface (HSSI) (Optional)177
- Hssi (J6)177
ASI/DVB/M2P Interface (Optional)177
- Asi in (J1)177
- Asi out (J2)177
- Dvb/M2P in (J3)178
- Dvb/M2P out (J4)180
Ethernet Data Interface (Optional)182
- Audio (J2)183
- Data (J3)184
- Bal (J4)184
- Esc Alarm (J5)185
- Sd (DDI) (J6)185
- Ddo (J7)185
- IDI (J8)185
- Sd (Ido) (J9)186
HSSI / Ethernet (J1)186
Ethernet Data Interface187
Gige Interface188
Chapter 6. Maintenance and Troubleshooting189
Periodic Maintenance189
- Clock Adjustment189
Troubleshooting189
- Alarm Faults190
- Alarm Masks194
IBS Fault Conditions and Actions195
Chapter 7. Technical Specifications197
Data Rates197
Modulator197
Demodulator198
Plesiochronous Buffer199
Monitor and Control199
DMD20/DMD20 LBST Drop and Insert (Optional)199
Terrestrial Interfaces199
IDR/ESC Interface (Optional)199
Ibs/Synchronous Interface (Standard)199
High-Speed Serial Interface (HSSI)200
Asi200
Dvb/M2P200
Ethernet Data Interface (Optional)200
Gigi Ethernet Data Interface (Optional)200
Hssi / G703200
Hssi /Ethernet200
Environmental201
Physical201
DMD20/DMD20 LBST Data Rate Limits201
- Non-DVB201
- Dvb203
BER Specifications205
- BER Performance (Viterbi)205
- BER Performance (Sequential)206
- BER Performance (Viterbi with Reed-Solomon)207
- BER Performance ((O)QPSK Turbo)208
- BER Performance (B/O/QPSK Turbo)209
- BER Performance (8PSK Turbo)210
- BER Performance (8PSK Trellis)211
- BER Performance (8PSK Turbo)212
- BER Performance (16QAM Viterbi)213
- BER Performance (16QAM Viterbi with Reed-Solomon)214
- BER Performance (16QAM Turbo)215
- BER Performance (16QAM Turbo)216
- 1/2 Rate B/O/QPSK BER Performance (LDPC)217
- 2/3 Rate Q/8PSK/8QAM BER Performance (LDPC)218
- 3/4 Rate Q/8PSK, 8/16QAM BER Performance (LDPC)219
- AGC Output Voltage224
Appendix A. Product Options227
Hardware Options227
G.703/IDR ESC Interface227
Internal High Stability227
DC Input Prime Power227
ASI/RS-422 Parallel227
ASI/LVDS Parallel227
Hssi227
Ethernet Data Interface227
Gigi Ethernet Data Interface228
Hssi228
Hssi / Ethernet228
Turbo Product Code / Variable Reed-Solomon228
Combination Low-Density Parity Check (LDPC) and TPC Codec228
Customized Options228
Appendix B. Front Panel Upgrade Procedure229
Introduction229
Required Equipment229
Upgrade Procedure229
Demonstration Procedure231
- Running in Demonstration Mode233
- Canceling Demonstration Mode234
Appendix C. Carrier Control235
States235
Carrier off235
Carrier on235
Carrier Auto235
Carrier Vsat236
Carrier RTS236
Appendix D. Strap Codes237
Strap Codes237
Sample Applications241
- Operational Case Examples242
Appendix E. Tcp/Ip Ethernet Setup247
Introduction247
TCP/IP Network Configuration247
Network Configuration Summary249
Ethernet Test249
- Connecting the Modem Ethernet Cable to a Network Link249
- Connecting the Modem Ethernet Cable Directly to a Computer (Without a Network249
- Testing the Ethernet Connection Using the Ping Program (Optional252
Setup253
- TCP-IP Menus253
- IP Address254
Appendix F. Web Interface Setup Guide253
Introduction253
Web Interface Security254
- Default User Accounts254
- User Account Data255
- User Account Setup255
- Edit the User ID256
- Edit the Access Group256
- Edit the Authentication Password256
Reset a User Account257
Confirmation257
Equipment Website258
- Log in to the Equipment Website259
Configure Web Browsers for the Radyne WEB Interface261
- Configure Internet Explorer 9 for the Radyne WEB Interface261
- Configure Firefox for the Radyne WEB Interface261
  - Change the Encoding262
  - Install the Internet Explorer Tab V2 Add-On263
- Configure Chrome for the Radyne WEB Browser264
  - Change the Encoding265
  - Install the Internet Explorer Tab for Chrome266
- Configure Safari for the Radyne WEB Browser267
- Configure Maxthon for the Radyne WEB Browser271
  - Change the Browser Mode272
  - Change the Encoding273
Appendix G. Aupc Operation275
Automatic Uplink Power Control (AUPC Operation275
- Radyne AUPC275
- Ef Aupc276
- Near Side AUPC276
Appendix H. Drop and Insert (D&I279
Drop and Insert (D&I279
- Drop Only281
- Insert Only281
- Mode Selection282
- Multidestinational Systems283
- Drop and Insert Mapping284
Configuring the Modem for Drop and Insert286
- Data Rate286
- Operational Network Specification287
- Terrestrial Framing - Drop Mode/Insert Mode287
  - Insert Terrestrial Frame Source287
- D&I Sample Configurations and D&I Clock Setup Options288
D&I Maps and Map Editing291
Appendix I. Efficient Drop and Insert (D&I296
Efficient Drop & Insert Mode296
- Calculating the Required Satellite Bandwidth297
- Calculating the Basic Efficient D&I Rate297
- Calculating the Efficient D&I Rate with E1 Signaling297
- Calculating the Efficient D&I Rate with Enhanced Asynchronous Overhead297
  - Summary and Examples298
Appendix J. Ethernet Data Interface Setup301
Configure the Modem to Use the Ethernet Data Interface (Optional301
- Ethernet Flow Control301
  - Half-Duplex Flow Control302
  - Full-Duplex Flow Control302
- Ethernet Daisy Chain302
- Ethernet QOS Type302
- Ethernet QOS Queue302
- Set up the Ethernet Bridge to Operate Like a FIFO303
- Packet Statistics304
- Metric Conversions305

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