Technical Manual

GUARDIAN VHF 110W MOBILE 3-1
CHAPTER 3: SOFTWARE THEORY OF OPERATION
3.1 Functional System Operation
3.1.1 General
All control and channel software is resident in the RECM.
3.1.2 Guardian Block Diagram
Figure 3-1: Software Theory of Operation Block Diagram
Switches
LCD
Keypad
Keypad MPU
H8 Controller
DSP
Audio
DB25 Accessory Connector
Transceiver
PSU
Power Supply
External Power
Receiver/Exciter/Control
Module (RECM)
Battery
Data
Power
Modulation
Control
IF Output
Control/Fill/Code
Keyfill
User Data