User Manual

Axell BSR 3308-PS NFPA
Product Description and User’s Manual
4 Doc PN 4000004131 Rev. 2.7 © Axell Wireless Ltd
1.4 NFPA Installation Architecture
To meet the National Fire Protection Association (NFPA) requirements, power to the
Repeater is provided via a UPS/±48VDC battery and the status of the UPS/battery,
Repeater and DAS system (antennas) is monitored via alarm connections to the Fire
Department Control Box.
NOTE: An alternative to the
F ire Department Control Box connections is to connect the BSR PS
NFPA and UPS dry contact alarms to an Automatic Dialer. Axell Wireless recommends the AD-2000
Automatic Voice/Pager Dialer System.
The alarms are connected as follows:
• From the UPS - the power indicator alarms are connected directly to the Fire
Department Control Box.
• From the Repeater – the Booster status and antenna status alarms are connected to
the Control Box
NOTE: The following figure illustrates an AC repeater architecture. In case of DC model repeaters,
the repeater is fed by a ±48VDC trickle charged battery. Make sure to keep the battery fully charged.
Figure 1-1. BSR 3308 BSR PS NFPA Architecture
1.5 Special Features
1.5.1 Smart-ALC Function
The Smart Automatic Level Control (Smart-ALC) is an innovative solution for automatic
repeater gain adjustment. Combined with advanced control algorithms, SALC can
perform gradual learning of traffic load characteristics and adjust the Repeater RF Gain
to an optimal value.
Some of the SALC advantages are:
• Network friendly - The SALC continuously adjusts gain for optimal performance
and minimum noise by keeping the same gain for full traffic as well as for pilot only
transmissions.