GatesAir Inc. ULXATSC Manual De Usuario
2/19/10
888-2715-001
1-7
WARNING: Disconnect primary power prior to servicing.
Section 1 Introduction
Maxiva ULX ATSC Series
User Manual
1.2.4
Transmitter RF Power Control
The PA modules operate in open loop mode (no gain or level adjustment). The
transmitter RF power control is done via the Phase and Gain Board located in the
predriver modules. The predrivers are the only components in the drive chain (besides
the exciter) capable of adjusting their RF power based on commands from the TCU.
transmitter RF power control is done via the Phase and Gain Board located in the
predriver modules. The predrivers are the only components in the drive chain (besides
the exciter) capable of adjusting their RF power based on commands from the TCU.
Each cabinet can also be placed in the "Manual Power Control Mode". In this mode the
automatic level control is disabled.
automatic level control is disabled.
1.2.4.1
Graphical User Interface
The TCU front panel (in the control PA cabinet on multi-cabinet transmitters) contains
the graphical user interface which is a 5.25" 1/4 VGA, LCD touchscreen display. The
touchscreen display uses software buttons to monitor and control the transmitter.
Hardware buttons for the primary transmitter functions such as ON, OFF, RAISE and
LOWER are provided on the overlay panel next to the display.
the graphical user interface which is a 5.25" 1/4 VGA, LCD touchscreen display. The
touchscreen display uses software buttons to monitor and control the transmitter.
Hardware buttons for the primary transmitter functions such as ON, OFF, RAISE and
LOWER are provided on the overlay panel next to the display.
TCU’s in additional PA cabinets will not be equipped with GUI screens.
Figure 1-4 TCU Front Control Panel
1.2.5
Control System Communications
The control system uses a serial communications system called a CAN bus. CAN stands
for Controller Area Network. The CAN bus is a closed loop serial network controlled
by the main TCU. The CAN bus connects the main TCU with TCU’s in other cabinets.
Each TCU board connected to the CAN bus is considered a node and therefore has a
specific address. This allows the master TCU to use the system bus to gather
information from all parts of the transmitter and display it on the GUI. One big
for Controller Area Network. The CAN bus is a closed loop serial network controlled
by the main TCU. The CAN bus connects the main TCU with TCU’s in other cabinets.
Each TCU board connected to the CAN bus is considered a node and therefore has a
specific address. This allows the master TCU to use the system bus to gather
information from all parts of the transmitter and display it on the GUI. One big