User's Manual

Axell BSF3604-490-510-DP-AC (61-103001) Repeater

Product Description and User’s Manual

2.2 Automatic Level Control

The repeater is equipped with Automatic Level Control (ALC). The ALC feature enables

maintaining the maximum defined output level.

The repeater has a defined maximum output level. If the input signal amplified by the gain set

exceeds the set output limit, an ALC loop is activated. This ALC ensures that the amplifier does not

add distortion to the radio signal. Below are examples of the ALC function for one and two carriers.

2.3 Operating Temperature

The BSF-3604 is designed primarily for multi carrier purposes. If the repeater is run at full output

power over a long period of time, the convection cooling may not be enough. The repeater is

equipped with a power management function that steps down the power and, if needed, fully shuts

down the amplifier chains until temperature reaches normal values. In situations where a repeater

will be run in such a manner extra cooling can be provided by putting the repeater in a temperature

controlled environment or via external fans.

+20

Input Signal, dBm

Output Power Level, dBm

Gain 70dB

-50

ALC

ALC one carrier

Input signal, dBm

Output power, dBm

+36,5

+33,8

-24 -16

Gain: 60 dB

+35

ALC two carriers