User's Manual

4-4 044-05xxx Rev A
4-7 Amplifier Alarms
The amplifier alarms are listed and described in Table 4-1. The front panel LEDs are described in
Chapter 3.
Table 4-1. G3L-929-135 Alarm States
Major Alarm -
Causes MCPA RF section to be disabled
Minor Alarm -
Does not cause MCPA RF section to be disabled
Amplifier
Alarm
Definition
Amplifier
Mode
Auto-Recovery Event/Fault Log
Output
Overpower
Disable the MCPA
immediately if the output
power is > +2 dB over rated
power.
Major
Input power decreases below
APC threshold (-11.2 dBm)
Records output
overpower event after
system disabled
Automatic
Power
Control
(APC)
Enabled if the output power
is > 51.7 dBm + 0.3 dB
Note: If the MCPA cannot
compensate the gain to
maintain compliance, the
Output Overpower or Input
Overdrive Faults will protect
the MCPA.
Minor
(Yellow LED
display)
Amplifier auto-recovers when
the output power drops below
51.6 + 0.3 dB.
Input
Overdrive
Disable the MCPA
immediately if the input RF
power is more than –5.7 dBm
Major
Input power decreases below
APC threshold (-11.2 dBm)
Records input overdrive
event, system disable
event, each auto
recovery event*
High
Temperature
Sensor temperature is >
+85° C
Major
Amplifier auto-recovers when
the sensor temperature drops
to < +75° C.
Records over
temperature event,
system disable event,
each auto recovery
event,
Low Gain
Disable the MCPA if the gain
of the MPCA is lower than
+50 dB for a duration of 1
minute with input power no
more than 33 dBm
Major
(Blinking
yellow LED
display)
The amplifier attempts to
increase gain to more than +50
dB. After 10 unsuccessful
attempts, permanent shutdown.
Records low gain
event, system disable
event, each auto
recovery event,
Reflected
Power
Reverse RF output power is
> +48.3 dBm for a duration of
1-minute
Major
MCPA waits 15 min before
initiating autorecovery.
Amplifier recovers if reverse
power is below +48.3 dBm
Records high reflected
power event, each auto
recovery event*
High
Voltage
Disable the MCPA
immediately if the supply DC
voltage > +30.5 Vdc
Major
Auto-recovery when the supply
voltage drops to < +29.5 Vdc
Records supply DC
fault event, system
disable event, each
auto recovery event*
Low
Voltage
Disable the MCPA
immediately if the supply DC
voltage < +20.5 Vdc
Major
Auto-recovery when the supply
voltage increases to > +24 Vdc
Records low voltage
event, system disable
event, each auto
recovery event*
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