Instruction Manual

6X Series Liquid-Cooled Transmitter Chapter 2, System Description
Instruction Manual, Rev. 0 2-5
stress on system components, maximizing component life. The control and
pump rack is typically mounted indoors, but is also available in an outdoor
version, if required.
3) Fan and Heat Exchanger System – The heat exchanger is a very compact, high-
efficiency unit, manufactured by Gunter USA.
These primary cooling systems are interconnected using Gates Premo-Flex Hose, or
equivalent, and barbed hose fittings, providing high reliability while simplifying
installation and maintenance.
2.6: Protection Circuits
To ensure that the 6X Series transmitter will provide reliable service in challenging
environments, a high degree of protection is provided in each amplifier chassis,
including overdrive, VSWR and overtemperature protection.
Axcera's Intelligent VSWR Protection™ (IVP) is designed to recognize the cause of
VSWR and react appropriately in order to protect the entire transmission system
while ensuring minimal loss of signal coverage. IVP determines whether the high
VSWR is caused by a catastrophic problem like a transmission line arc, or if it is a
temporary problem such as antenna icing. In the catastrophic case a typical
transmitter may continue to produce power, resulting in expensive antenna,
transmission line or RF system repairs. But IVP is designed to quickly remove drive
to the final amplifier, avoiding further damage to the system components. For a
temporary VSWR condition like antenna icing, the system is designed to remain on
the air at a reduced power level until the VSWR returns to a normal level, ensuring
minimal coverage loss during the VSWR condition.
AGC around the system ensures that the transmitter output remains stable. An
output bandpass and trap filter is included to provide out of band rejection. This RF
network also adds lightning protection through the DC short circuit of the band pass
filter.
2.7: GUI and Problem Identification System
The GUI has a pre-set group of graphical screens that can be navigated by the
standard touch screen included in the system. These are somewhat auto-configuring
depending on what hardware is found in the system at any given point in time. The
GUI system allows the reading of all significant parameters of the transmitter. It
also enables and disables the transmitter, controls different modes the transmitter
can be placed, and enables or disables the remote control.
Most major components of the transmitter system have a button on the front panel.
This is a pushbutton with a three color LED mounted in it, Red, Blue and Green. The
standard operation of this button is that it stays blue whenever the system is
operating normally, which is all parameters are within acceptable limits. If a
problem occurs, the color changes to RED. When the button is pressed, that
subsystem is brought to the foreground on the controller touch screen, and if the
button was red when pushed, indicating a problem in that module, the touch screen
will show the details of the problem. Pushing these buttons will have no effect on
any operating mode of the transmitter, you can push them anytime and nothing will
change other than what parameters the GUI displays.