Amplifier Front Panel
Amplifier Front Figure 3
The front panel contains the following indicators and controls. To prevent damage, become familiar with the
front panel
before
operating the amplifier.
Meters (1 and 2)
This amplifier has two dual-movement panel meters. The left-hand meter (fig.2 ref 1A and 1B) continuously
reads power amplifier module currents up to 25-amperes. Keep current below 25-amperes when using CW. On
SSB voice, displayed current will typically be less than 10-amperes. Currents reaching full or beyond full scale
for short periods are generally not harmful. The power supply has over-current shutdown. The over-current
protection resets by turning the amplifier OFF for several seconds, and then restarting the amplifier.
The right-hand meter’s left scale-arc (fig.2 ref 2A) continuously indicates forward peak envelope power (PEP)
directly in kilowatts. The scale is 100 watts, or 0.1 kW, per meter scale picket. PEP is the highest instantaneous
average or effective heating power during one (or more) complete radio frequency cycle(s) at the modulation
envelope crest. PEP has no fixed relationship to long-term average power in amplitude modulated or SSB
transmissions. With constant amplitude carriers, like a steady CW carrier, PEP and average powers are equal.
The right-hand meter’s rightmost scale-arc (fig.2 ref 2B) is used for PEP reflected power, ALC power setting
(power scale times ~ten), and combiner imbalance (power scale direct) using the upper scale numbers and
pickets. Notice
power
calibrations are not evenly spaced. Lower scale numbers and pickets, because they
ALS-1306 Exihibit VIII Page 10 / 27
Содержание ALS-1306
Страница 9: ...Interconnection Wiring Interconnections Figure 2 ALS 1306 Exihibit VIII Page 9 27...
Страница 20: ...CB2 control board Figure 6A CB2 ALS 1306 Exihibit VIII Page 20 27 ALS 1306 Exihibit VIII Page 20 27...
Страница 21: ...CB2 control board Figure 6B CB2 ALS 1306 Exihibit VIII Page 21 27 ALS 1306 Exihibit VIII Page 21 27...
