
User manual
EXPERT 2K-FA
Pag. 53 of 53 Issue 2 – May 2011
18. DIAGNOSTICS.
During normal working, the system performs a continuous monitoring of some
measurements directly acquired from certain internal test-points.
When a dangerous situation is going to happen, a “serious” alarm message is raised
and the amplifier is switched from
OPERATE
to
STANDBY
.
The user can either immediately restore the
Main Display Page
by pressing the
[
DISPLAY
] key or wait for the visual alarm time-out expiration (about 10 seconds).
The following table shows all the system’s alarm messages that are recorded in the
Alarm
History
stack:
Message
Description
SWR EXCEEDING LIMITS
Protection for SWR greater than 3:1.
INPUT OVERDRIVING
Protection for excessive input power.
EXCESS OVERHEATING
Protection because the internal temperature has
exceeded safe limits.
COMBINER FAULT
Protection for unbalanced combiner.
POSSIBLE MODULE FAULT
The combiner temperature increases very fast
While the following table shows all the dynamic warning messages that are not
recorded in the
Alarm
History
stack:
Message
Description
BAND NOT PERMITTED
Band not allowed or not set.
ANTENNA NOT AVAILABLE
Antenna not set.
TX ANTENNA NOT AVAILABLE In the selected band is set only one antenna
for reception.
STEADY OUTPUT POWER
EXCEEDING LIMITS
Appears when in "MAX" is transmitted a
digital or continuous signal, the linear
switches automatically in "MID".
INTERNAL OVERHEATING
Appears when the internal temperature reaches
75 ° C (167 ° F), the linear automatically
switches to the power level immediately
below.
HIGH SWR ANTENNA: TUNING
NOT ALLOWED
When the antenna SWR is over 3.5:1, the auto
tuner is not enabled to operate.
ATU BYPASS: TUNING NOT
ALLOWED
Since the tuner is bypassed, it is not
possible any matching nor automatic nor
manual.
NO INPUT POWER: TUNING
HALTED
The tuner can not work for to low input
power.
CAN'T SWITCH-OFF: POWER
HELD BY REMOTE
The amplifier does not turn OFF by the
keyboard because it is kept ON by a remote
device (transceiver or USB port).
COMBINER OVERHEATING
Indicates that the amplifier is going to go
into protection for "COMBINER FAULT. "
The “COMB. BAL.” on the Display is defined by two numbers:
-
First shows how the temperature of the combiner circuitry increases in one minute.
-
Second shows the absolute temperature of the combiner circuitry.