Cobham 700/800 MHz Digital Multi-Channel Class A Public Safety Signal Booster

Flexible, On-Frequency and Frequency Shifting RF Repeaters

Cobham D-MBR 3707-3708 PS NFPA (Digital Multi Band Repeater for Public Safety) is a Class A Digital Multi-Channel Signal Booster (DCSB). It features an array of up to 48 DSP based, software-controlled, variable bandwidth filters (up to 75KHz) per band , that are user-programmable across the 700 and 800 MHz bands.

D-MBR 3707-3708 PS NFPA supports all public safety technologies. For each filter, the user can specify the start and stop frequencies to reduce the installation time of the signal booster and enable a very wide range of filters selection.

Every parameter of D-MBR 3707–3708 PS NFPA, including filter tuning and selection, can be controlled via web based management. The patented Cobham Wireless digital RF filter enables simple initial setup for any channel plan and if necessary, allows some basic reconfiguration due to re-banding.

The SALC - Smart ALC algorithm will reduce the gain to protect the signal booster from oscillation. When the gain cannot be reduced anymore a shut-down mechanism will be triggered.

The uplink squelch feature gates each channel uplink unless traffic is happening minimizing uplink noise at BTS receiver.

The Spectrum tool enables viewing uplink and downlink power levels over the complete bandwidth. The tool allows identifying peak usage and monitoring of power levels.

This product meets the rigid requirements as defined by the NFPA and International Fire Code developmental organizations. The amplifier is painted a Fire Life Safety Red, meets NEMA 4 compliance for hose down, and provides all Alarming outputs as defined by NFPA 2013, Chapter 24 including system and antenna failures. The power supply integrity alarm is via BDA Failure Alarm if primary power is disconnected or otherwise interrupted.

The signal booster is a DC fed unit. An external battery charger unit is available as well. The charger is connected to the AC and includes a circuit to charge external batteries with all the dry contact alarms as defined in the NFPA standard: AC failure, Charger failure and Low battery.