RD-LAP/MDC4800 Motient/ARDIS
CMX969
1.5.4.2 RD-LAP Mode
The CMX969 Frame Structure in RD-LAP mode is illustrated in Figure 5b, and consists of a Frame Preamble
(comprising a 24-symbol Frame Synchronisation pattern and Station ID block) followed by one or more
'Header’ blocks, one or more 'Intermediate’ blocks and a 'Last’ block. Channel Status (S) symbols are
included at regular intervals. The first Frame of any transmission is preceded by a Symbol Synchronisation
pattern.
Figure 5b RD-LAP Over Air Signal Format
ã 2001 Consumer Microcircuits Limited
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D/969/5