Page. 55 of 87
18. DIAGNOSTICS.
During normal operation, this sophisticated monitoring system continuously monitors
several measurements directly acquired from internal test-points.
When a dangerous situation occurs, a “serious” alarm message is raised and the
amplifier is switched from OPERATE to STANDBY.
The user can either restore immediately 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:
Protection for SWR greater than 3:1.
Protection for excessive input power.
Protection because the internal temperature has
exceeded safe limits.
The following table shows all the dynamic warning messages that are not recorded in
the Alarm History stack:
Band not allowed or not set.
In the selected band is set only an antenna for
reception.
STEADY OUTPUT POWER
EXCEEDING LIMITS
Appears when a continuous signal is transmitted in
"MAX”. After 15 sec. the amplifier will switch
automatically to "MID".
Appears when the internal temperature reaches 75 °C
(167 °F). The amplifier automatically switches to the
next lowest power level.
HIGH SWR ANTENNA:
TUNING NOT ALLOWED
When the antenna SWR is over 3.5:1, the auto tuner is
disabled.
ATU BYPASS:
TUNING NOT ALLOWED
Since the tuner is bypassed, it is not possible to
match automatically or manually.
NO INPUT POWER:
TUNING HALTED
The tuner can not work at such a 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).
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