MBF-40 SMR700/SMR800 PS REPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
www.cobham.com/wireless Date: 28-Jan-16 Cobham Wireless – Coverage
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Rev. 2.1 Doc. No. 00046UM
1.1 Features and Capabilities
• High-power indoor/outdoor unit dual-band model, supporting SMR at 700/800 MHz.
• Output power at the antenna (composite): 37dBm.
• Very low noise factor - minimizes interference to BTS and increases high speed data throughput
• Single or Dual Fiber feed models available
• Remote commissioning and monitoring:
• Via OMU II intuitive Web GUI
• Via AEM – no local setup required
• SNMP v1/v2c support
• Plug-and-Play: Automatic detection and Optical Gain Setting via the OMU
• Automatic Level Control (ALC) - provides constant gain in both uplink and downlink paths
according to the defined maximum output level
• Backup battery for ‘last gasp’ indication (sending fault error before power failure)
• Optional - two internal power supplies provided for some models ensure robust unit operation
• Power source: 115VAC or -48V power (model dependent)
1.2 ALC
The repeater has a constant gain in both uplink and downlink paths. The repeater has a defined
maximum output level. If the input signal amplified by the gain set exceeds the set output limit, an
ALC (Automatic Level Control) 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.
Figure 1-2: ALC
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