ifi S251-250 Operating And Maintenance Instructions Manual page 12

4.4.2 S251-250 CONTROLS
CONTROL
Local
ALC Switch
Power ON/OFF
Control Level Adjust Knob The optional Level Adjust control is a ten-turn pot, which allows a
FLT/RST
OPR/STB
When depressed, the amplifier is restored to the local control from the
GPIB mode of control.
The optional Automatic Leveling Control (ALC) is a feature, which
selects the method for leveling, either internal, external or manual.
The Power On/Off switch is a circuit breaker that is used as an
On/Off switch as well as a circuit protection device. This switch
turns the driver either on or off.
minimum of a 30 dB range of gain. Turning the control Counter
Clockwise (CW) produces a minimum gain.
Important Note: If the amplifier is not equipped with this option, the
display will still indicate a GAIN percentage (refer to Figure 5.0). This
percentage indication is still controlled by Level Adjust Control but the
both the Level Adjust Control and the corresponding GAIN percentage
indication has no effect on the amplifier gain.
The Reset/Fault (FLT/RST) is a reset switch that resets the fault
indication. If a fault indication is present, the fault indication can
remove the by depressing this switch.
The Operate/Standby (OPR/STB) switch which when the switch is set
in the Standby mode, the Power Supply is turned off to the amplifier
circuitry. When set in the Operate mode, the Power Supply delivers
voltage to the amplifier circuitry.
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