Vector-LP Radio Beacon Transmitter Technical Instruction Manual Page 3-7
Section 3 Operating Instructions Issue 1.1
Table 3-2: Front Panel - Control Section Controls and Indicators
PANEL
MARKING
DESCRIPTION
Power Increase
Pushbutton switch that increases the RF output power level of the
transmitter. RF power is increased from minimum power to maximum
power in approximately 200 steps. Each step will increase the output
voltage of the switch mode power supplies to the RF power modules
linearly – the RF output power increase will follow a square law.
Pressing and holding the switch increases the rate of change.
Power Decrease
Pushbutton switch that decreases the RF output power level of the
transmitter. RF power is decreased from maximum power to minimum
power in approximately 200 steps. Each step will decrease the output
voltage of the switch mode power supplies to the RF power modules
linearly – the RF output power decrease will follow a square law.
Pressing and holding the switch increases the rate of change.
Local
Pushbutton switch that sets control of transmitter functions to switches
on the front panel. When its integral lamp is on (amber) (by pressing the
switch), Local control has been selected.
When Local control is selected, all of the remote control circuits (except
the external interlock and RF off function) are disabled.
Remote
Pushbutton switch that sets control of transmitter functions to remote
control circuits. When its integral lamp is on (amber) (by pressing the
switch), Remote control has been selected.
When Remote control is selected, all pushbutton switches on the
exciter’s front panel that execute control functions, except the RF Off
switch, are disabled and have no influence. The RF Off switch is still
enabled to ensure the RF power stage can be turned off locally in the
event of an emergency.
RF On
Push button switch that turns on the transmitter's RF power stage and,
for VR250 transmitters, its cooling fans when it is pressed. Its integral
lamp will be on when the RF power stage is turned on. Transmitter will
operate at the level stored in the selected power pre-set.
RF Off
Push button switch that turns off the transmitter's RF power stage when
it is pressed. Its integral lamp will be on when the RF power stage is
turned off.
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