Comtech EF Data DMD-2050E - Manual (Page 55)

DMD2050E Universal Satellite Modem Theory of Operation
MN-DMD2050E Revision 2 3–13
Figure 3-7. Loopback Functional Block Diagram
3.5 DMD2050E Clocking Options
The following paragraphs define the types of clocking options available to the user at the Front
Panel of the DMD2050E. Refer to Figure 3-8 for clocking and polarity.
3.5.1 Clock Selection
The modem supports a number of different clocking options that can be recovered from the
satellite or the terrestrial links. The various clocking options allow users to determine which clock
will best fit their applications. Figure 3-7 gives an overview on how the modem processes the
various clocks for the Tx Clock source and the Rx Buffer Clock source. Tx and Rx Clocks may be
independently locked.