Radyne OM20 User Manual download pdf (Page 5)

Table of Contents

Acknowledgments / Danksagung............................................................................................... 2

Abstract ...................................................................................................................................... 3

Zusammenfassung...................................................................................................................... 4

Table of Contents ....................................................................................................................... 5

References .................................................................................................................................. 6

ETSI Standards....................................................................................................................... 7

RFC Standards........................................................................................................................ 9

List of Abbreviations................................................................................................................ 10

1. Introduction...................................................................................................................... 12

1.1. DVB History ............................................................................................................ 12

1.2. DVB Suite ................................................................................................................ 15

2. Satellite Communication.................................................................................................. 19

2.1. Digital Communications Overview.......................................................................... 19

2.2. Satellite Link Budget Calculations........................................................................... 23

3. Simple Network Management Protocol (SNMP)............................................................. 26

3.1. SNMP Introduction .................................................................................................. 26

3.2. SNMP Applications.................................................................................................. 28

3.3. Used MIB Object Identifications (OIDs)................................................................. 30

3.3.1. WRITEable Values .......................................................................................... 31

3.3.2. READable Values ............................................................................................ 32

4. DVB-S.............................................................................................................................. 33

4.1. DVB-S System Architecture .................................................................................... 33

4.2. DVB-DSNG System Architecture ........................................................................... 35

4.3. DVB-S2 System Architecture .................................................................................. 36

4.4. Performance Comparison......................................................................................... 42

5. Managing the Satellite Modem ........................................................................................ 45

5.1. Basic Configurations................................................................................................ 46

5.2. Data Collection......................................................................................................... 48

5.2.1. Developed Managing Application <mt1.exe> ............................................. 48

5.2.2. Measuring Series.............................................................................................. 50

5.2.3. Discussion of the Output Values of the Satellite Modem ................................ 56

5.2.4. Correcting the Estimator of the Satellite Modem............................................. 58

5.2.5. Resulting E

Threshold................................................................................ 61

5.3. Controller Implementation ....................................................................................... 64

5.3.1. Developed Managing Application <mt2.exe>............................................. 64

5.3.2. Controller Concept ........................................................................................... 69

5.3.3. Hardware-based Simulations............................................................................ 73

6. Conclusions and Outlook ................................................................................................. 75

Appendix A: SNMP MIBs ....................................................................................................... 77

Appendix A.1: DMD20 MIB Subtree Definitions............................................................... 77

Appendix A.2: DMD20 MIB ............................................................................................... 81

Appendix A.3: RFC Default MIB........................................................................................ 86

Appendix B: Modem Characteristics ....................................................................................... 89

Appendix B.1: RADYNE DMD20 Modem Reference Characteristics............................... 89

Appendix B.2: Listings of Measured Values ....................................................................... 89

Appendix C: Cookbook............................................................................................................ 99

1 2 3 4 5 6 7 8 9 10 ... 99 100

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