Instruction Manual

6X Series Liquid-Cooled Transmitter Chapter 3, Installation, Set Up and
Problem Identification Procedures
Instruction Manual, Rev. 0 3-6
3.5: Initial Turn-On Procedures
After the cabinets and the transmission lines have been connected, the system should
first be swept and fine matched through to the Station Load. Then the system should
be turned on using the following procedure. During the initial turn-on procedure the
system should be tested into a system test load and not the antenna. The transmitter
should be operated in this mode until initial testing is completed. After the initial turn-
on procedure is completed, the output of the transmitter can be connected to the
antenna for normal operation.
NOTE: Check that all installation has been completed before proceeding with the
initial turn-on of the transmitter.
Caution: Check that all circuit breakers on the exciter/amplifier, pump
cabinet assembly and heat exchanger have been turned off.
Check that the combined RF output of the RF system is terminated into a dummy load
with a rating of at least the rated output of the transmitter. Check that all hoses are
connected to the exciter/amplifier, pump cabinet assembly and heat exchanger.
Switch on the Main AC circuit to the system. Switch On the circuit breakers on the
exciter/amplifier, pump cabinet assembly and heat exchanger. Push the Operate
button on exciter/amplifier cabinet, which will indicate Amber until all systems are
operating normally. The automatic controls will purge the water system and check for
proper water flow throughout the system. When all systems are operating properly,
the Operate button will turn Green. Push the Green button to place the transmitter in
Operate. Warning: Do not operate the exciter/amplifier cabinet assembly with no
water flow through the system.
Connect a Digital test signal to the Input jack on the rear panel of the Axciter
Modulator Tray.
Slowly adjust the gain pot on the front panel of the Axciter to attain 100% output
power on the LCD display on the exciter/amplifier cabinet.
3.6: Setup and Operation Procedures
The exciter/driver was set up at the factory for normal operation and only
minor adjustments may be required.
3.6.1: Axciter Set Up Overview
It is one of the features of the Axciter that it has no internal adjustments that are
made on its circuitry. There is not even an adjustable pot, capacitor, or coil
anywhere on the boards. This is made possible through the use of almost entirely
digital electronics that are under software control. Even component aging should not
put the unit out of normal operation.
Several system parameters are adjusted through the user interface screens, such as
power output, AGC levels, etc. Mostly this is through commands sent from the