Elecraft KXPA100 Manual - Manual (Page 36)

36
 Attenuator radio button: Click to switch the attenuator in (check appears) or out (no check). This works
only if the 3 dB ATTEN switch on the KXPA100 is in the OUT/AUTO position. The radio button cannot
change the attenuator state if the 3 dB ATTEN switch on the KXPA100 is in the IN position. When the
KXPA100 is used in basic operation, the attenuator will switch in automatically when the RF drive from
the transceiver exceeds 8 watts (see Faults on page 32).
Faults Reported by the KXPA Utility
Faults occur to protect the amplifier and ATU if a dangerous, abnormal condition occurs. Normal KXPA100
amplifier or KXAT100 ATU operation is suspended until the fault condition is corrected. If a fault occurs, a
plain text description will appear in the window. Faults will clear in 8 seconds after the condition causing the
fault is corrected. Click on
CLEAR to reset the fault immediately without waiting the full 8 seconds.
Code Display Description Detail
N NO FAULT
Not a fault
Number of times
KXPA100 turned
on since last fault
A NO MATCH
KXAT100 Antenna tuner was unable to find a
match for the antenna's impedance
SWR
C HI CURRENT
PA drain current exceeds the permitted limit Amperes
D HI DISSIPATION
PA is dissipating too much power as heat.
Dissipated power is input supply voltage times PA
drain current less output power.
Watts
H HI SUPPLY VOLTAGE
Input dc supply voltage too high Volts
L LO SUPPLY VOLTAGE
Input dc supply voltage too low. Volts
P HI FORWARD POWER
RF output (forward) power exceeds the permitted
maximum
Watts
R HI REFLECTED POWER
RF reflected (reverse) power exceeds the permitted
maximum
Watts
S HI SWR
Antenna SWR exceeds the permitted maximum and
ATU is absent or is not tuned for the frequency
used.
SWR
T HI TEMPERATURE
PA heat sink temperature exceeds allowed limit Degrees C