SECTION 1: THEORY OF OPERATION
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GENERAL BLOCK DIAGRAM
General Block Diagram Definitions
For increased data security, the modem supports the U.S. Government developed Digital Encryption
Standard (DES) data encryption and decryption protocols. This capability requires installation of third-
party IP compliant DES encryption and decryption software.
The standard
IP
Series base station circuit board contains five (5) main sections defined below:
Input/Output
Circuitry associated with one of the following base station’s data
connectors:
RS232 Serial Port DB9 Data Connector
RJ45 Ethernet 10 Base T Interface Connection
System Controller
Houses the modem, diversity, and Ethernet circuitry. Manages the
operation of the base station’s modem providing transmit timeout
protection in the event a fault causes the base station to become
halted in the transmit mode. The system controller also handles the
loading of selected transmit and receive frequencies into the injection
synthesizer. Includes memory for storage through Electrically
Erasable Programmable Read Only Memory (EEPROM) of the base
station’s operating parameters, which are retained after the base
stations power is cycled off.
