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Unformatted text preview: tatus of the RF lock and bit synchronization processes. INTERNAL FUNCTIONS
(a) Receives and detects the modulated carrier/subcarrier. (b) Performs demodulation and symbol synchronization. (c) Determines the state of the physical telecommand channel (CHANNEL
ACTIVE or CHANNEL INACTIVE). (d) Performs symbol detection (hard decisions or quantized, soft decisions). (e) Informs the layer above of status of the Physical layer. CCSDS 201.0-B-3 Page B-8 June 2000 CCSDS RECOMMENDATION FOR TELECOMMAND: CHANNEL SERVICE B4 CHANNEL SERVICE PERFORMANCE SPECIFICATION The performance of the Channel Service is specified to meet the requirements defined for the
layer above. In the case where the layer above is a TC Transfer Frame, the performance
specification is given in Reference . The performance provided by the Channel Service
depends on the performance of the individual elements and procedures for a CLTU defined
in Sections 3 and 4, and as shown in Figure 3-4.
Suggested processing alternatives for each of the elements of a CLTU are...
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This document was uploaded on 03/06/2014.
- Spring '14