Radyne DMD50 Installation And Operation Manual page 40

Table of Contents
DMD50 Universal Satellite Modem
3.7 Clocking Options ................................................................................................................................. 3-11
3.7.1 TX Clock Options .............................................................................................................................. 3-11
3.7.2 RX Buffer Clock Options ................................................................................................................... 3-12
3.7.3 EXT REF: External Reference, Top BNC Port, J10 ............................................................................... 3-14
3.8 RS530/422/V.35 Interface (Standard) ................................................................................................. 3-14
3.8.1 G.703 Interface (Optional) ............................................................................................................... 3-14
3.8.2 HSSI Interface (Optional) .................................................................................................................. 3-14
3.8.3 Ethernet Data Interface (Optional) ................................................................................................... 3-14
3.9 Reed-Solomon Codec .......................................................................................................................... 3-15
3.9.1 Reed-Solomon Operation................................................................................................................. 3-15
3.9.2 Reed-Solomon Code Rate ................................................................................................................ 3-15
3.9.3 Interleaving ..................................................................................................................................... 3-15
3.10 Asynchronous Overhead Operation (Framing/Multiplexer Capability) ................................................ 3-17
3.11 Standard IBS Mode.............................................................................................................................. 3-18
3.12 Asynchronous Multiplexer Mode ....................................................................................................... 3-18
3.13 2 9 B E SC Backward Alarms .......................................................................................................................... 3-19
3.13.1 To Disable the ESC Backward Alarms ............................................................................................ 3-19
3.14 DoubleTalk Carrier-in-Carrier Option................................................................................................... 3-20
3.14.1 What is DoubleTalk Carrier-in-Carrier? ......................................................................................... 3-20
3.14.2 Application Requirements............................................................................................................ 3-21
3.14.3 Operational Recommendations ................................................................................................... 3-23
3.14.4 System Functionality and Operational Considerations .................................................................. 3-24
3.14.5 DoubleTalk Carrier-in-Carrier Cancellation Process ....................................................................... 3-26
3.14.6 Margin Requirements .................................................................................................................. 3-28
3.14.7 Carrier-in-Carrier Latency ............................................................................................................ 3-28
3.14.8 Carrier-in-Carrier and Adaptive Coding and Modulation ............................................................... 3-28
3.14.9 Carrier-in-Carrier Link Design ....................................................................................................... 3-28
3.14.10 Carrier-in-Carrier Commissioning and Deployment ...................................................................... 3-34
3.14.11 Validating Carrier-in-Carrier Performance .................................................................................... 3-35
3.14.12 Operational References ............................................................................................................... 3-36
3.14.13 Carrier-in-Carrier Link Budget Calculation .................................................................................... 3-36
3.14.14 Estimating PSD Ratio ................................................................................................................... 3-37
3.14.15 DoubleTalk Carrier-in-Carrier Specifications ................................................................................. 3-39
3.14.16 Carrier-in-Carrier Summary .......................................................................................................... 3-39
3.14.17 Glossary ...................................................................................................................................... 3-40
3.15 Satellite Control Channel (SCC) ............................................................................................................ 3-42
3.15.1 SCC Framing Structure ................................................................................................................. 3-42
3.15.2 1 1 5 B A ggregate Data Rate .................................................................................................................... 3-43
3.15.3 Overhead Rate Comparison ......................................................................................................... 3-43
3.15.4 Actual Overhead Rate Calculation ................................................................................................ 3-44
3.15.5 SCC Overhead Channel Setup....................................................................................................... 3-45
3.16 EDMAC Satellite Framing/Deframing Mode ........................................................................................ 3-46
3.17 Locating the ID Code Operational Procedure ....................................................................................... 3-46
3.18 Strap Codes ......................................................................................................................................... 3-46
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Revision 4
MN-DMD50