15
Front Panel Controls
Figure 2 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.
MULTIMETER
Right scale FET Module Current, Voltage, ALC, and Reflected
Power. Left Scale Power Output. Multimeter (reflected power, module voltage,
ALC, or module current) selected by control 6.
2.
BAND SELECT
or REMote selector knob.
3.
BAND INDICATOR
or REMote backlit LED indicators, also warning if flashing.
4.
ALC SET
limit adjustment.
5.
ALARM INDICATORS
ALC, High SWR, PA Fault, and Transmit on.
6.
MULTIMETER SELECTOR
switch.
7.
OPERATE/STANDBY
switch, also resets fault warnings.
8.
MAIN POWER
switch, also resets power supply overload.
The meter’s left scale-arc (Figure 2, ref 1) continuously indicates forward peak envelope
power (PEP) output directly in watts. 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.
Summary of Contents for ALS-706
Page 27: ......
