User's Manual

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D-620616-0-20 Rev D CONFIDENTIAL
Connecting a Main Hub to a Base Station
6.8.2.2 Using the Uplink ALC Setting
Uplink automatic level control (UL ALC) circuitry for each band within the RAU
provides automatic level control on high-power signals in the uplink path. This func-
tionality is required to prevent RF signal compression caused by a single or multiple
wireless devices in very close proximity to the RAU band. Compression causes signal
degradation and, ultimately, dropped calls and data errors, and should be prevented.
Two settings are available to optimize UL ALC performance:
• Multiple Operators: Use when more than one operator and/or protocol is present
in the Fusion Wideband system’s band frequency or adjacent frequency bands.
This setting is most commonly used.
• Single Operator and Protocol: Use when only one operator and protocol is
on-the-air within the Fusion Wideband system’s configured and adjacent fre-
quency bands. This setting is seldom used.