350-Watt Digital VHF LB Transmitter
Chapter 3, Installation and Setup Procedure
DT325B, Rev. 0
3-14
Table 3-19: Menu 40-13 - Transmitter Set-up: Minimum Forward Power Fault
Threshold Screen
This screen is used to set the minimum forward power fault threshold. When the
transmitter is operating, it must operate above this value otherwise the system will shut
down with fault for 5 minutes. If after five minutes the fault is not fixed, the transmitter
will enable, measure the power and if less than this value it will again shut down for five
minutes.
Table 3-20: Menu 40-14 - Transmitter Set-up: Maximum Reflected Power Fault
Threshold
This screen is used to set the maximum reflected power fault threshold. When the
transmitter is operating, it must not operate above this value otherwise the system will
slowly begin to reduce the forward output power. If the system's reflected output power
exceeds the maximum reflected power threshold by five percent or more, the
transmitter will shut down with fault for 5 minutes. If after five minutes the fault is not
fixed, the transmitter will enable, measure power and if above this value plus five
percent it will again shut down for five minutes. If the system's reflected output power
exceeds the maximum reflected power threshold due to some condition like the
formation of ice on an antenna, the transmitter reduces visual forward power to a level
where the reflected power is less than this threshold. The transmitter will automatically
increase its output power to normal operation when the cause of higher than normal
reflected power is corrected.
Table 3-21: Menu 40-19 - Transmitter Set-up: Remote Commands Control
This screen is used to allow or deny the use of remote control commands. When
disabled, remote commands are not used. Remote commands are commands received
either through the rear terminal blocks or through serial messages.
Push the ESC button to exit the Transmitter Set Up Screens to Menu 13, Table 3-8, the
Transmitter Configuration Access Screen.
The same previous screens will be displayed by the back up exciter if it is switched to
become the On Air Exciter.
This completes the description of the menu screens for the Driver/Amplifier Chassis
Assembly and the Setup and Operation Procedures for the DT325B.
