27
Amplifier Monitoring and Status Indicators
LEDs
The amplifier reports antenna SWR and output power on LED bargraph displays. The right-most LED in the
bargraph varies as power varies through its range. The bargraphs are color-coded green for normal, yellow for
marginal and red for excessive levels.
Excessive levels may trigger a fault and switch the KPA1500 to
STBY
(see
Fault Conditions
, page 33). The
FAULT
LED lights if a fault condition occurs and LEDs indicate whether the amplifier is in
STBY
or
OPER
mode.
ANT 1
and
ANT 2
:
Indicates which antenna connector is active. When the KPA1500 is turned off, ANT 1 is
always selected, even if it is disabled in firmware or no antenna is connected.
ATU IN
and
ATU
BYP
:
When an antenna with low SWR is used and the antenna tuner is enabled,
both
ATU
IN
and
ATU
BYP
LEDs are illuminated; indicating
BYP
is the best tune solution, even when the ATU is engaged
(
ATU IN
). When the KPA1500 is turned off, the ATU is bypassed.
Internal Speaker Alarm Tones
The internal speaker emits an alarm tone for hard or soft faults. The
ALARM TONE
menu item default is
ON
and
a hard fault is a steady tone and a soft fault is an intermittent beep. Tap the
RESET
key to silence the alarm.
LCD Notification Messages
Messages are temporarily displayed on the LCD when certain events occur.
When the band is changed, the LCD shows the new band for about one and a half seconds, for example:
BAND
7 MHz
.
When the
ATU TUNE
switch is pressed,
NEED TUNE PWR, Key Exciter
is displayed as a reminder to provide
RF for ATU tuning. You may tap
AT U T U N E
again to cancel the full search tune request.
TUNE
CANCELLED
appears briefly on the LCD. When ATU tuning finishes normally, the LCD shows
TUNE COMPLETE
briefly.
LCD Message
Meaning
BAND n MHz
Amplifier now operating on the “n” MHz band.
NEED TUNE PWR
Key Exciter
ATU is in full-search tune mode and needs RF power
from the transceiver to perform the tune.
TUNE COMPLETE
ATU full search tune successfully found a match.
TUNE CANCELLED
AT U T U N E button pressed during a full search tune
and halted the process.
RF IN, NO KEY IN
PWR 30W
Reports when the KPA1500 is used with antennas with
auto-tuners (for example, SteppIR controllers). The PA
is bypassed but is not a fault condition. Input power is
displayed on the second line.
FUNCTION UNASSIGNED
Button has no operation programmed.
Status and Menu Items
Tap
STATUS
to
display various amplifier operating parameters.
Tap
MENU
to
call the menu display.
