User's Manual

UM-0848 21
The third and fourth LED summarizes operational conditions for uplink “UL” and downlink “DL”
chains.
In general, the LEDs have four states: “off”, “slow blinking”, “fast blinking” and “on”. Table 1
describes alarm and warning conditions for each led state.
Table 1
Indicator Panel
LED indication description
Signal Booster is not powered or fail in power supply
Normal state: Signal Booster is powered on
Normal state
HW fail: digital signal processor is not detected
Board Temperature: very high internal Signal Booster temperature
Base Station Warning: No signal is detected coming from base station
PA UL Status Alarm: alarm based on PA current consumption
RF input overflow: maximum level at RF input is exceeded
Normal state
PA DL Status Alarm: alarm based on PA temperature
PA DL Overflow: PA output level is higher than +40dBm
RF input overflow: maximum level at RF input is exceeded
PA DL Underflow: PA output level is lower than +25dBm
Normal state
Where:
Led OFF
Led slow blinking with period of 2 seconds aprox. WARNING
Led fast blinking with period of 0.5 seconds aprox. ALARM
Led ON