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Suggested processing alternatives for each of the

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Unformatted text preview: shown in Table B-1. Table B-1: Processing of CLTU Elements Element Implementation Procedure Modulation Start Acquisition Sequence CLTU “Start” Start Sequence A: 0 error in start seq. B: 0 or 1 error in start sequence CLTU “Data Unit” Codeblock A: Triple error detection B: 1-bit error correction CLTU “Finish” Tail Sequence Idle Sequence Codeblock rejection Codeblock rejection Modulation End Physical link Stop modulation (post-CLTU): A: PLOP-1 B: PLOP-2 The overall performance for different combinations of the above strategies (plus variables such as CLTU length) is given in Reference [C2]. Accordingly, the recommended Channel Service strategies are as shown in Table B-2. Table B-2: Recommended Strategies Strategy CLTU Start CLTU Data Unit Modulation End 1 A A A or B 2 B B A or B CCSDS 201.0-B-3 Page B-9 June 2000 CCSDS RECOMMENDATION FOR TELECOMMAND: CHANNEL SERVICE ANNEX C INFORMATIVE REFERENCES (This annex is not part of the Recommendation.) [C1] Procedures Manual for the Consultative Committee for Space Data Systems . CCSDS A00.0-Y-7. Yellow Book. Issue 7. Washington, D.C.: CCSDS, November 1996. [C2] Telecommand: Summary of Concept and Rationale. Report Concerning Space Data Systems Standards, CCSDS 200.0-G-6. Green Book. Issue 6. Washington, D.C.: CCSDS, January 1987. CCSDS 201.0-B-3 Page C-1 June 2000...
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