Comtech EF Data SDM-300L3 - Manual (Page 33)

SDM-300L3 Satellite Modem Revision 1
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
I C BUS 2
RAM AND
REAL
TIME
CLOCK
ROM
(M&C,
BULK,
BOOT)
FAULT
AND ALARM
RELAYS
MICRO-
CONTROLLER
DAC
ADC
EIA-232
OR
EIA-485
9-PIN
REMOTE
Figure 1-3 . M&C Block Diagram