10/6/10 888-2629-200 1-5
WARNING: Disconnect primary power prior to servicing.
Section 1 Introduction
Maxiva ULX COFDM Series
modules, 2 driver modules and 16 PA modules. Note that the predriver and driver
modules are redundant.
Figure 1-3 Maxiva ULX-8700** COFDM Block Diagram
1.2.3 Transmitter Control System
The Maxiva COFDM transmitter uses a simplified control system that minimizes the
number of microprocessors. Each transmitter sub-system is responsible for its own
monitoring and protection and simply reports back to the TCU (transmitter control unit)
for display on the GUI (Graphical User Interface) or to a remote interface. In multi-
cabinet systems the TCU in cabinet 1 functions as the main controller while the TCU in
each amplifier cabinet acts as a slave controller. The cabinet 1 TCU will contain the
GUI display for the transmitter. Additional PA cabinets do not contain GUI screens.
The system bus originates in MCM (master controller module) inside the cabinet 1 TCU
and goes to the TCU located in each amplifier cabinet. The system bus is used to
transfer telemetry information in between the TCU’s.
The cabinet bus is similar to the system bus but it connects the cabinet TCU (MCM
card) to all of the nodes inside each individual cabinet. If system bus communications
EX 1
EX 2
MOV/AC
SAMPLING
TCU

GUI
RF
SWITCH
PS AND
COOLING
MONITOR
RF
MONITORING
÷
DIR
COUPLER
PUMP CONTROL
INTERLOCKS
PARALLEL
REMOTE
TO PUMP MODULE
PA Bus
CABINET
FLOW
METER
INLET /
OUTLET
TEMP
LEAK
DETECTOR
I/O PANEL
Transmitter
Main Cabinet
PA
INTERFACE
AC
Distribution Bus
Driver-PAs
16 PA’s
CAN Bus
Exciter CAN Bus
TO OTHER
CABINETS
N+1 CAN Bus
TO N+1
CONTROLLER
INTERLOCKS
PARALLEL
CONTROL
Front Panel
Buttons
System /CAN Bus
Ethernet
Ethernet
Ethernet
Web
Remote /
Monitoring
L1
L2
L3
FANS
Pre-Drivers
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