Figure 3-22. 1 To 3 Control Ratio; Figure 3-23. 1 To 1 Control Ratio - Comtech EF Data DMD-2050E Installation And Operation Manual

DMD2050E Universal Satellite Modem
The number of user data slots and control words per frame is selected by the SCC Control Ratio
Parameter. This can be any value from 1 to 1 through 1 to 7. A higher ratio allows a lower
overhead rate but since there are less Sync Words, there is a higher acquisition time.
The following examples show a control ratio of 1 to 3 and 1 to 1. Example 1 shows three Control
Words for every Synchronizing Word, and Example 2 shows one Control Word for every
Synchronizing Word.
The Control Ratio of the receiving units must match the Control Ratio of the transmitting unit.
MN-DMD2050E Revision 2

Figure 3-22. 1 to 3 Control Ratio

Figure 3-23. 1 to 1 Control Ratio

Theory of Operation
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