Transmitter Control System; Main Controller; Pa Cabinet Slave Controllers - Harris Intelligent Transmitter Platinum-i Series Technical Manual

______________________________________________HARRIS

1.2.2 Transmitter Control System

See Figure 1-5. The control system for the transmitter consists of a main controller
mounted in the control cabinet, plus individual slave controllers mounted in each amplifier
cabinet. Data from the system is interfaced through the monitor board to the display
controller, and shown on the front panel flat display screen as bar graphs and numerical
readings. Transmitter ON/OFF, LOCAL/REMOTE, and power RAISE/LOWER switches
are located on the control cabinet, to the right of the display panel.
1.2.3 Display Panel
The main control system samples each cabinet and gathers all of the status and analog data
for the display. The touch screen display is part of a monitoring computer and the main
controller will continue operation of the transmitter when this computer has a fault. The
control panel indicators back up the touch screen and operation button back up the touch
screen button functions.

1.2.4 Main Controller

The transmitter main control unit provides a central point for control and monitoring the
entire system. The main controller interfaces with the slave controller(s) for the amplifier
cabinets' ON/OFF commands, and with the exciter for power RAISE/LOWER commands.
Peak detectors collect aural and visual RF samples and send them to the main controller for
power metering. The main controller also directs VSWR foldback action.
The main controller has a battery backup to restore the transmitter to its previous operating
condition after a temporary AC power failure. A power down timer will automatically turn
the transmitter off if the power is not restored within approximately two hours. Remote
status and analog outputs are provided by the main controller to a series of D connectors in
the rear of the control cabinet.
1.2.5 Slave Controllers
The slave controllers are mounted in the upper left-hand slot of each amplifier cabinet.
Each is responsible for controlling and monitoring its PA cabinet. The controllers interface
the cabinet to the main controller and monitor in the control cabinet.
888-9058-001
17
WARNING: Disconnect and lockout AC primary power prior to servicing