User's Manual

Table Of Contents

Designing a Fusion Wideband Solution

Page 104 InterReach Fusion Wideband Installation, Operation, and Reference Manual

The effect of activating the uplink or downlink attenuators is to reduce the coverage area of the

adjusted RAU band. The coverage radius will be reduced by roughly a factor of 2. More

specifically, if d is the coverage distance without attenuation and d’ is the coverage radius with

the attenuation, then

where PLS is Path Loss Slope (dBm).

Using the Uplink ALC Setting

Uplink Automatic Level Control (UL ALC) circuitry for each band within the RAU provides ALC on

high-power signals in the uplink path. This functionality 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

erators: 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 frequency bands. This setting is

seldom used.