Instruction Manual

15
Front Panel Controls
Figure 5 Amplifier Front Panel
The front panel contains the following indicators and controls. To prevent damage,
become familiar with the front panel before operating the amplifier.
1 PA Module Current meters
2 Forward Power meter and Multimeter (reflected power, module RF balance,
ALC, and Module supply voltages) selected by knob 7.
3 Band or REMote selector knob.
4 Backlit Band and REMote LED indicators.
5 ALC limit adjustment.
6 Backlit Function and Fault Warning LED indicators.
7 Multimeter (meter 2) scale function selector knob.
8 Operate/Standby switch, also resets fault warnings.
9 Main Power, also resets power supply overload.
Note: The right-hand meter’s left scale-arc (fig.5 ref 2) continuously indicates forward peak
envelope power (PEP) output directly in kilowatts. It is 100 watts, or 0.1 kW, per meter scale
picket. PEP has no fixed relationship to long-term average power except, for constant
amplitude carriers like a steady CW carrier, when PEP and average powers are equal. PEP is
the highest average power during one (or more) radio frequency cycle(s) at the modulation
envelope crest.
The right-hand meter’s rightmost scale-arc is used for PEP reflected power in watts and
combiner imbalance on the upper scale numbers and pickets. Notice power meter calibrations
are not evenly spaced. Lower scale numbers and pickets are evenly spaced, and are for other
functions. The lower right scale is used for relative ALC setting and power amplifier modules
HV (0-70 volts).