Harris Atlas DVL400, Technical Manual

Page: 103 / 180

2/25/03 888-2473-001 4-3
WARNING: Disconnect primary power prior to servicing.
Section 4 Theory of Operation
ATLAS Series™
4.3 Transmitter Control System
The Atlas Series transmitters utilise a very advanced but simple to use control
system. It is a microprocessor, serial communication based software control system
but uses backup Life Support logic circuitry and hard wired control lines, allowing
the transmitter to be on the air even if the main control system fails.
Figure 4-1 shows a simplified block diagram of the transmitter control system. The
left side of the diagram shows the external connections to the transmitter or more
specifically the External I/O Board. The right side of the diagram shows the internal
control system inter-connections from the Main Controller to the various sub-
systems inside the transmitter cabinet.
Figure 4-1 Control System Simplified Block Diagram
NOTE:
The Web browser and network interface will be available by mid-year 2002.
Serial remote interface protocol is available upon request but requires user to
write their own control application.
Ext
I/O
Board
Main
Controller
&
Life Support
Control Bus to 2nd PA Cabinet
*Web Browser
Internet Access
TCP/IP
Ext Interlocks
*Network Interface
Control
Metering
Status
Pump Control Bus
to Pump Control Module
Exciter A
Exciter B
(Optional)
RS-232
RS-232
V-XCAST
Configuration
and Operation
Software
RS-232
Drive Control Unit
RF Monitor
Backplane Interface
Board
Control Bus
To PA
Modules
Coolant Sensors
MOV Board
PA Power Supplies
PS Monitor
Board
RF Samples
RF DRIVE
Low Voltage
Graphical User Interface
Ethernet
Standard
Parallel
Remote Control
Local Pushbutton Controls
ITIS
*Available soon