Specifications

SDM-300L3 Satellite Modem Revision 0

Introduction MN/SDM300L3.IOM

1–13

1.8.2 Functional Description

The M&C card is composed of the following subsections:

• Microcontroller with Universal Asynchronous Receiver/Transmitter (UART)

• Digital-to-Analog Converter (DAC)

• Read Only Memory (ROM)

• Analog-to-Digital Converter (ADC)

• Read Access Memory (RAM)

• Universal ASYNC

• User Interface

• Fault and Alarm Relays

MODEM

11 MHz

CLOCK

IC BUS

RAM AND

REAL

TIME

CLOCK

ROM

(M&C,

BULK,

BOOT)

FAULT

AND ALARM

RELAYS

MICRO-

CONTROLLER

DAC

ADC

EIA-232

EIA-485

9-PIN

REMOTE

Figure 1-3

. M&C Block Diagram