Front Panel; Baseband Processing - Comtech EF Data DMD50 Installation And Operation Manual

DMD50 Universal Satellite Modem
Figure 3-3. Universal Satellite Modem Functional Block Diagram

3.2.1 Front Panel

The Front Panel includes a 2 x 16 backlit LCD Display, Indicator LEDs, and a Numeric Keypad
(refer to Chapter 4).

3.2.2 Baseband Processing

The Baseband Processor performs all of the functions required for an IBS/IDR Framing Unit, a
Reed-Solomon Codec, and an E1/T1 Drop and Insert System. In addition, the Baseband
Processing Section provides for transmit clock selection and rate adaptation as well as a rate
adapter and Plesiochronous/Doppler (PD) Buffer in the receive direction. A multiplexer is also
provided for the SCT Clock Source for Loop Timing Applications. The transmit and receive
paths may be configured independently under processor control.
MN-DMD50– Revision 3
Theory of Operation
3–4