7
Operation
This amplifier has alert codes. SWR, PA, TX, and band switch lamps indicate
operational faults. Operational faults reset by placing the amplifier in Standby
momentarily. The following table applies to faults:
Warning
Light
Steady
Warning
Light
Flashing
Fault
Cause or Cure
SWR
TX
Antenna Reflected
Power
High antenna SWR or
intermittent antenna or feed line
connection
SWR, PA
Band
Wrong filter
Exciter or amplifier on
incompatible band, filter failure
PA
TX
PA FET too hot
Excessive power for duty cycle
or SWR, lack of proper airflow
PA
Combiner unbalance
10M, PA,
TX
Illegal 11 meter
operation
Excessive 27 MHz signal level
REM, PA
No or wrong band when
on remote
Defective or improper remote
cable, or bad radio band data
information
Table 1 Warning Alert Codes
Before attempting operation:
1.) This amplifier is optimized for a 50-ohm load. Be sure your antenna system
50-ohm SWR is as low as possible. As SWR increases from 1:1, either heat
or distortion will increase.
2.) Be sure your antenna system, including any lightning protection devices, will
safely handle high power.
3.) Connectors, cables, and antennas must not have loose connections or
insulation issues.
4.) Your exciter must be less than 100 watts output.
5.) Power mains should capable of 15 amperes, reasonably stable, and 200 to
260 volts.
6.) The low pass filters cut off just above traditional primary bands. This means
primary filters are used on the WARC bands. Some radios do not supply
enough band data to know the exact band, so with some radios the amplifier
band data displays the
next higher
primary band above a WARC band. Do
not be alarmed if, for example, 15 meters illuminates when 17 meters is
selected on some radios.
7.) The amplifier will shut off if an incorrect band is selected, if antenna SWR is
too high (even for an instant), if thermal limits are reached, or if there is a
catastrophic failure.
8.) The ALS-1406 metering reads peak envelope power on all RF power
functions.
Summary of Contents for ALS-1406/S
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