Data Sheet Chapter 5

10-kW UHF Transmitter with Chapter 5, Detailed Alignment Procedures
Feedforward Drive
840A, Rev. 0 5-23
Table 5-3. Control Logic Board Status Indicators
LED FUNCTION DESCRIPTION
DS1 OPERATE
Indicates that transmitter is
in the Operate mode
DS2* INTLK. (INTERLOCK)
Whole system shutdown
interlock used for external
connections; normally
jumpered across on the
remote control and interface
assembly
DS3 AIR
Indicates that air pressure
switch is closed and there is
sufficient air flow around the
tube
DS4 FIL (FILAMENT)
Indicates that filament
power supply is operating
DS5
FIL UV (FILAMENT UNDER
VOLTAGE)
Indicates that filament
voltage is above the preset
of the lower threshold point
DS6 BIAS
Indicates that bias power
supply is operating
DS7* INTLK (INTERLOCK)
High-voltage shutdown
interlock; normally
jumpered across on the
remote control and interface
assembly
DS8 H.V. (HIGH VOLTAGE)
Indicates that high-voltage
supply is on and above the
preset level
DS9* INTLK (INTERLOCK)
Interlock is not used in the
10-kW amplifier; jumpered
across on the control logic
board (J3, pins 9 and 10)
DS10 RF (DRIVE)
Indicates that Mute
command has been
removed from the
upconverter tray
Note: If the exciter and
the aural and visual
driver sections are
operating normally, the
transmitter will have an
output.
DS11 FAULT 3
Indicates that three faults
have occurred in succession
or within a given time frame
Note: This action will
remove the high voltage,
screen, and RF drive.