Comtech EF Data Vipersat 564L Guide de l'utilisateur Page 52
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Vipersat Configuration
3-16 Vipersat CDD-56X Series User Guide
This value can be modified by entering a G at the command prompt to display
the dialog shown in figure 3-14 and entering a new value.
Figure 3-14
Slot Guardband prompt
Note: The value entered at the command line in figure 3-14 is in milliseconds.
The corresponding value expressed in bytes is calculated by the
CDD-56X based on the STDMA transmit bit rate as shown in the menu
in figure 3-7.
Slot Preamble Length
This menu item, which appears in all Hub configurations, displays the current
Slot Preamble size in milliseconds and bytes for the remotes in the group. The
Slot Preamble is the period between when the remote begins to transmit (sends
an ACK) to the Hub and when the first data packet is sent. This allows time for
signal lock to occur before data is sent, thus preventing data loss. Higher data
rates allow for a shorter preamble, since it is easier to achieve signal lock. The
setting for this parameter should be obtained using the Vipersat STDMA Calcu-
lator.
Note: When the BFAT feature is enabled, the preamble length is set automati-
cally for the unit.
Entering a P at the command prompt allows changing the preamble duration in
milliseconds.
Figure 3-15
Slot Preamble Length prompt
NOTE
NOTE
- User Guide 1
- Vipersat CDD-56X Series 3
- Document Revision History 5
- Table of Contents 7
- Appendix A 8
- Appendix B 8
- Appendix C 9
- Appendix D 9
- Appendix E 9
- List of Figures 11
- Appendix A Figures 12
- Appendix B Figures 12
- Appendix C Figures 12
- Appendix D Figures 12
- List of Tables 13
- How to Use This Manual 15
- Conventions and References 16
- Product Description 17
- Router Features 18
- Dynamic SCPC (dSCPC) 18
- Single Hop On Demand 19
- New in This Release 20
- Chapter 1 - General 1-7 21
- Customer Support 22
- Reader Comments / Corrections 23
- QUICK START CONFIGURATION 25
- Initial Configuration 26
- Table 2-1 27
- Figure 2-1 28
- Figure 2-2 28
- Figure 2-3 29
- Figure 2-4 29
- Figure 2-5 30
- Table 2-2 30
- Figure 2-6 31
- Figure 2-7 33
- Figure 2-8 34
- Figure 2-9 35
- Common Screen Commands 38
- Menu Descriptions 39
- Figure 3-1 39
- Figure 3-2 40
- Figure 3-3 40
- Figure 3-4 41
- Figure 3-5 42
- Vipersat File Streamer 43
- Vipersat Configuration 44
- Figure 3-6 44
- Figure 3-7 45
- Figure 3-8 45
- Figure 3-9 46
- Group ID 48
- Figure 3-10 49
- Figure 3-11 50
- Figure 3-12 51
- Figure 3-13 51
- Figure 3-15 52
- Figure 3-14 52
- Figure 3-16 53
- Figure 3-17 54
- Figure 3-18 54
- Figure 3-19 55
- Figure 3-20 56
- Figure 3-21 56
- Figure 3-22 57
- Figure 3-23 58
- Figure 3-24 58
- Figure 3-25 59
- Figure 3-26 59
- Figure 3-27 60
- Figure 3-28 60
- Figure 3-29 60
- Figure 3-30 61
- Figure 3-31 61
- Figure 3-32 62
- Figure 3-33 62
- Figure 3-34 63
- Figure 3-35 63
- Figure 3-36 64
- Figure 3-37 64
- Figure 3-38 66
- Figure 3-39 67
- Figure 3-40 68
- Figure 3-41 68
- Figure 3-42 69
- Figure 3-43 70
- Figure 3-44 71
- Figure 3-45 71
- Figure 3-46 72
- Figure 3-47 73
- Figure 3-48 73
- Figure 3-49 74
- Figure 3-50 74
- Primary Heart Beat 75
- Home State Revert 75
- Figure 3-51 77
- Figure 3-52 77
- Figure 3-53 78
- Figure 3-54 79
- Figure 3-55 80
- Figure 3-56 81
- Figure 3-57 81
- Figure 3-58 82
- Figure 3-59 82
- Figure 3-60 83
- Figure 3-61 83
- Figure 3-62 84
- Figure 3-63 85
- Figure 3-64 86
- NETWORK ADDRESSING 87
- The OSI Reference Model 88
- Figure A-1 88
- Binary Math 90
- IP Addressing 92
- Private Network IP Addresses 94
- Subnet Mask 95
- Network Segments 96
- Figure A-9 97
- Example: 00-3f-bf-00-01-45 97
- Figure A-10 98
- AUTOMATIC SWITCHING 99
- Load Switching 101
- Table B-1 101
- Figure B-1 103
- Load Switching Process 104
- Figure B-2 105
- Load Switch Example 106
- Figure B-3 107
- Figure B-4 109
- Application Switching 109
- B - Automatic Switching B-13 111
- Fail-Safe Operation 112
- Figure B-5 113
- Figure B-6 114
- DYNAMIC POWER CONTROL 115
- Description 117
- Table C-1 117
- Adjustment for Data Rate 119
- Figure C-1 120
- NETWORK MIGRATION 123
- Firmware Upgrade 125
- Figure D-1 126
- Figure D-2 127
- Figure D-3 127
- Figure D-4 128
- Figure D-5 128
- Figure D-6 129
- Figure D-7 130
- Figure D-8 131
- Figure D-9 132
- Figure D-10 132
- Figure D-11 133
- Figure D-12 133
- Figure D-13 134
- Figure D-14 134
- Figure D-15 135
- Figure D-16 135
- Figure D-17 136
- Figure D-18 136
- Figure D-19 137
- Figure D-20 137
- Figure D-21 138
- Figure D-22 139
- Figure D-23 139
- GLOSSARY 141
- Appendix E - Glossary E-3 143
- Appendix E - Glossary E-5 145
- Appendix E - Glossary E-7 147
- Appendix E - Glossary E-9 149
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