Comtech EF Data CDM-710L Spécifications Page 147
- Page / 242
- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
CDM-710 Broadcast Satellite Modem Revision 11
Forward Error Correction Options MN/CDM710.IOM
7–3
Another useful parameter is the occupied bandwidth is the bandwidth between -10 dB
points of the power spectral density, which are approximately:
Occupied Bandwidth = 1.19
x Symbol Rate, for 35% Rolloff
= 1.15
x Symbol Rate, for 25% Rolloff
= 1.12 x Symbol Rate, for 20% Rolloff
Table 7-1
provides the Eb/No, spectral efficiency and occupied bandwidth for the CDM-710.
Table 7-2 and
Table 7-3 outline these parameters per the modem’s DVB schemes.
Figure 7-1 through Figure 7-7 illustrate the error performance characteristics. To convert
Es/No to Eb/No:
Eb/No = Es/No - 10xLog(Spectral Efficiency)
Table 7-1. Eb/No, Spectral Efficiency and Occupied Bandwidth*
Mode Type FEC Code
Inner
Code
Rate
Eb/No
at QEF
Spectral
Efficiency
(bps/Hz)
Normalized
S
y
mbol Rate
(
=
Bit Rate x)
Occupied *
Bandwidth for
10 Mbps (35%
Rolloff)
DVB-S QPSK Conv+RS 1/2 4.5 0.921569 1.085 12.913
QPSK Conv+RS 2/3 5.0 1.228758 0.814 9.685
QPSK Conv+RS 3/4 5.5 1.382353 0.723 8.609
QPSK Conv+RS 5/6 6.0 1.535948 0.651 7.748
QPSK Conv+RS 7/8 6.4 1.612745 0.620 7.379
DVB-DSNG 8-PSK Conv+RS 2/3 6.9 1.843137 0.543 6.456
8-PSK Conv+RS 5/6 8.9 2.303922 0.434 5.165
8-PSK Conv+RS 8/9 9.4 2.457516 0.407 4.842
16-QAM Conv+RS 3/4 9.0 2.764706 0.362 4.304
16-QAM Conv+RS 7/8 10.7 3.225490 0.310 3.689
* Taken at the -10 dB points on the plot of power spectral density, the occupied bandwidth is 1.19 x
Symbol Rate for 35%, and 1.15 x Symbol Rate for 25%.
- CDM-710 1
- Errata A 3
- Table of Contents 9
- Figures 18
- PREFACE 19
- Preface MN/CDM710.IOM 20
- Installation 21
- Environmental 21
- CE Mark 22
- RoHS Compliance 22
- Warranty Policy 23
- Limitations of Warranty 23
- Exclusive Remedies 24
- Customer Support 25
- Online Customer Support 25
- Chapter 1. INTRODUCTION 27
- 1.2 Functional Description 28
- Introduction MN/CDM710.IOM 29
- 1.3.1 Physical Description 30
- 1.3.2 Major Assemblies 31
- 1.3.3 Dimensional Envelope 32
- 1.3.4 Physical Features 33
- 1.3.4.1 Front Panel 33
- 1.3.4.2 Rear Panel 34
- 1.3.6 Verification 36
- FAST System Theory 37
- FAST Implementation 37
- FAST Accessible Options 37
- Figure 1-7. Spectral Mask 40
- 1.4.2 Modulator 41
- 1.4.2.1 CDM-710 (70/140 MHz 41
- ) Modulator 41
- 1.4.3 Demodulator 42
- Maximum Level 43
- Minimum Level 43
- 1.4.4 Test Functions 45
- 1.4.5 Monitor Functions 45
- 1.4.6 Remote Port Operation 45
- 1.4.7 Data Rate Range 46
- Chapter 2. INSTALLATION 49
- 2.2 Mounting 50
- Installation MN/CDM710.IOM 51
- Chapter 3. REAR PANEL 53
- CONNECTORS 53
- PINOUTS 53
- 3.2.1 Tx IF Connectors, J1 55
- 3.2.2 Rx IF Connectors, J3 55
- 3.4 Utility Connections 56
- 3.4.1 Alarms Connector, P1 56
- 3.5 Power/Ground Connectors 58
- Chapter 4. FLASH UPGRADING 59
- IMPORT ANT 60
- 4.5 USB Procedure 63
- Chapter 5. FRONT PANEL 65
- OPERATION 65
- 5.1.2 Front Panel Keypad 67
- 5.2 Opening Screen 68
- 5.2.1 Menu Matrix 69
- 5.3 SELECT: (Main) Menu 70
- 5.3.1 SELECT: Config 71
- (CONFIG: Remote) Local 72
- (CONFIG: Remote) Serial 72
- (CONFIG: Remote) Ethernet 73
- ENTER when done 74
- (CONFIG: Tx) Mod 76
- (CONFIG: Tx:) Mod Æ Type 76
- (CONFIG:Tx) Mod Æ Inv 76
- (CONFIG: Tx) Mod Æ α 77
- (CONFIG: Tx) Code 78
- (CONFIG : Tx) SymRate 78
- (CONFIG: Tx) Mode 80
- (CONFIG: Tx) Frequency 81
- (CONFIG: Tx) Pwr 81
- (CONFIG: Tx) Pwr Æ Level 82
- (CONFIG: Tx) Pwr Æ On/Off 82
- (CONFIG: Tx) Pwr Æ Imped 82
- 5.3.1.3 (CONFIG:) Rx 83
- (CONFIG: Rx) FEC 83
- (CONFIG: Rx) Dem (Demod) 83
- (CONFIG: Rx) Dem Æ Type 83
- (CONFIG: Rx) Dem Æ Inv 84
- (CONFIG: Rx) Dem Æ Acq 84
- (CONFIG: Rx) Dem Æ α 84
- (CONFIG: Rx) Dem Æ Eq 84
- (CONFIG: Rx) Dem Æ IQ-TP 85
- (CONFIG: Rx) Code 85
- (CONFIG: Rx) SymRate 86
- (CONFIG: Rx) Mode 86
- (CONFIG: Rx) Freq 86
- (CONFIG: Rx) Eb/No 87
- (CONFIG: Rx) PLL 87
- Interface 2 88
- (CONFIG: Intfc1 ASI) Config 89
- (CONFIG: Intfc1 HSSI) Tx 90
- ENTER 93
- • Normal: CTS = RTS 93
- ENTER. Enable is selected to 97
- ENTER. Enable is 97
- ENTER or CLEAR when done 99
- 5.3.1.7 (CONFIG:) Ref 101
- 5.3.1.8 (CONFIG:) Aux 101
- (CONFIG: Aux) Auto/Manual 101
- (CONFIG: Aux) Ena/Dis 102
- (CONFIG: Aux) FORCE(1:1) 102
- 5.3.1.9 (CONFIG:) Alarms 102
- (CONFIG: Alarms) Tx 102
- 5.3.2 SELECT: Monitor 103
- 5.3.2.1 (Monitor:) Alarms 103
- (Monitor: Alarms) Transmit 103
- (CONFIG: Alarms) Intfc1 103
- (Monitor: Alarms) Receive 104
- (Monitor: Alarms) Unit 104
- 5.3.2.2 (Monitor:) Rx_Stats 106
- (Monitor:) Event-Log Æ View 107
- 5.3.3 SELECT: Test 107
- 5.3.3.1 (Test:) Mode 107
- (Available Some Interfaces) 109
- 5.3.4 SELECT: Info 110
- 5.3.4.1 (INFO:) Rem 110
- 5.3.4.2 (INFO:) Tx 111
- 5.3.4.3 (INFO:) Rx 111
- 5.3.5 SELECT: Save/Load 113
- 5.3.5.1 (Save/Load:) Save 113
- 5.3.5.2 (Save/Load:) Load 114
- 5.3.6.1 (UTIL:) RT-Clk 114
- 5.3.6.2 (UTIL:) Ref 115
- 5.3.6.3 (UTIL:) ID 115
- 5.3.6.4 (UTIL:) Display 115
- 5.3.6.5 (UTIL:) Firmware 115
- (Firmware:) Info 116
- (Firmware:) Info Æ Bootrom 116
- (Firmware:) Select 116
- 5.3.6.6 (UTIL:) FAST 118
- (FAST:) Cnfg (Configuration) 118
- (FAST:) Cnfg Æ Code 118
- (FAST:) Cnfg Æ Demo Mode 118
- (UTIL:) FAST Æ View 119
- Chapter 6. ETHERNET 121
- MANAGEMENT 121
- IMPORTANT 122
- 6.3.1.1 Common Private MIBs 123
- 6.3.1.3 ASI Private MIB 123
- 6.3.1.6 HSSI MIB 124
- 6.3.3 SNMP Traps 124
- 6.4 Telnet Interface 125
- 6.4.2 Using Telnet 127
- 6.4.3 Telnet Examples 127
- 6.5.2 User Login 128
- 6.5.3 Web Server Menu Tree 129
- 6.5.4.1 Home Page 130
- Select Boot Image 139
- Perform Soft Reboot 139
- Chapter 7. FORWARD ERROR 145
- CORRECTION OPTIONS 145
- 7.3.1 Range of Data Rates 146
- Eb/No (dB) 150
- DVB-S: QPSK BER vs Eb/No 150
- Es/No (dB) 153
- DVB-S2: 8-PSK PER vs Es/No 154
- Chapter 8. CDI-40 ASI 157
- INTERFACE MODULE 157
- 8.2.1 Connector Pinouts 159
- 8.3 Functional Description 160
- 8.3.1.1 MPEG-2 Null Packet 160
- 8.3.3 1:1 Applications 161
- 8.4 General Specifications 162
- Chapter 9. CDI-60 HSSI 163
- 9.2 Physical Description 164
- 9.2.1 Connector Pinout 165
- Continuous Clock 166
- Gap Clock 166
- GIGABIT ETHERNET (GigE) 167
- Gigabit Ethernet Card 168
- MPEG COP3 Annex A) 170
- Appendix A. REMOTE CONTROL 175
- A.3 EIA-232 176
- A.4 Basic Protocol 176
- A.5.3 Address Delimiter 178
- A.5.4 Instruction Code 178
- A.5.7 End Of Packet 179
- Appendix A MN/CDM710.IOM 180
- A–6 180
- A.6.1 Modulator 181
- A–8 182
- A–9 183
- A–10 184
- A–11 185
- A–12 186
- A–13 187
- A–14 188
- A–15 189
- A–16 190
- A–17 191
- A–18 192
- A–19 193
- A.6.2 Demodulator 194
- A–21 195
- A–22 196
- A–23 197
- A–24 198
- A–25 199
- A–26 200
- A–27 201
- A–28 202
- N/A 5 bytes Query only 203
- A–30 204
- A–31 205
- A–32 206
- A.6.3 Modem 207
- A–34 208
- A–35 209
- A–36 210
- A.6.4 Priority System 211
- A–38 212
- A–39 213
- A–40 214
- A–41 215
- A–42 216
- A–43 217
- A–44 218
- A–45 219
- A–46 220
- A–48 222
- A–49 223
- A–50 224
- A–51 225
- A.6.5.1 MGC Format 226
- A–53 227
- A–54 228
- A–55 229
- A–56 230
- Appendix B. Eb/No 231
- MEASUREMENT 231
- ((Co+No)/No)/10) 232
- Appendix C. FAST ACTIVATION 237
- PROCEDURE 237
- UTILITY Æ FAST menu: 239
- Cnfg, then press [ENTER]: 239
- C.3 Using FAST Demo Mode 240
- METRIC CONVERSIONS 241
- Units of Length 241
- Temperature Conversions 241
- Units of Weight 241
- 480 • 333 • 2200 PHONE 242
- • 333 • 2161 FAX 242
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