User's Manual

Chapter 2 System Description
2.3.2 Control Cabinet
In
each DRU-2KW system, the control cabinet is located in front of the OFN cabinet,
between the HB and LB HPA cabinets.
The control cabinet is accessible through hinged, locking, front and rear doors. Once the
DRU-2KW system is fully assembled, the rear of the control cabinet is no longer accessible
as it is located immediately in front of the OFN cabinet.
The control cabinet is cooled by the ambient air. A fan, mounted on the top panel, aids the
cooling process by exhausting air out of the cabinet. The operating temperature for the
cabinet is 32°F to +131°F (0°C to +55°C).
Two (2) temperature sensors are mounted in the control cabinet, allowing the system to
monitory the temperature inside the cabinet. One temperature sensor is mounted on the
bottom left side of the cabinet, while the other is mounted on the top panel next to the fan.
The following components are housed within the control cabinet:
 Power Distribution Unit (PDU)
 Battery Management System/Charger (BMS)
 12V Battery
 High Band Dual Band Pass Filter (DBPF)
 High Band Low Noise Amplifier (LNA)
 High Band Exciter (HBE)
 Low Band Exciter (LBE)
 Terrestrial Repeater Monitoring System (TRMS)
 Dial-up Modem (customer furnished equipment, where applicable)
 Break-Out-Board
 Bulkhead/Cable Entrance with Surge Protectors and Fan
The HBE and LBE are mounted on retractable shelves, allowing each component to be pulled
out of the cabinet. This permits the user to access (the rear panel) or replace each
component with relative ease.
The top panel includes a number of bulkhead connectors used to interconnect components
in the control cabinet with components in the other cabinets.
SX03-30000-01-M01
2-9