User's Manual

AXELL 3307D REPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
44 © Axell Wireless Ltd
The following table provides a description of the displayed alarms.
Alarm
Fault, most probable cause and recommendation
System Mute Generates an alarm when Repeater amplification is muted (automatically)
User Mute Repeater amplification is muted (manually) as a result of an operator action.
Built In Test Self test.
Temperature High unit temperature.
Most probable cause: Excessive heat.
Check the Repeater case for external causes (sun, hot environment, air flow
is blocked). Eliminate the reason for excessive heat
Donor Power Too
Low
Generates an alarm when the Pre Amplifier current exceeds the allowed
limits
Fault in the DL or UL path.
Most probable cause: Downlink (Uplink) power amplifier module outputs a
low current.
Check the LEDs in the Repeater
PAmp Current
Generates an alarm when the Power exceeds the allowed limits.
Fault in the DL or UL path.
Most probable cause: Downlink (Uplink) power amplifier module
outputs a low current.
Recommendation: Check the LEDs in the Repeater
RSSI
Fault in the DL or UL path
Most probable cause: caused by a excessively high input signal
Recommendation: Check the LEDs in the Repeater
VSWR
This alarm is triggered when the return loss of the Downlink antenna or
cable connection exceeds 3 dB (VSWR 6:1).
This alarm provides an indication of the status of the cable connected to
the antenna. If a cable is defective, the VSWR is decreased and the
alarm is triggered.
Reduced Gain by
IMOP
Shows when the IMOP mechanism was activated in order to respond to
detected oscillations.
GREEN – normal operation – no oscillations were detected.
RED – oscillations were detected and the system reduced gain in order
to eliminate the oscillations.
Check the Donor and Mobile antenna installations for isolation. After
isolation is within the required levels, the system will automatically
increase gain (since it will no longer affect oscillations and) and the
LED will turn GREEN.
Interferer Power
Exceeded
Indicates if there is any external interference at a level that may affect the
operation of the unit.
Green – low or no interference. Unit operation is not affected.
Red – high external interference that may affect the operation of the unit. It
is recommended to identify the source of the interference and distance the
source or the unit from each other.