User's Manual

Chapter 2 System Description
2.3.3 HPA Cabinet
In each DR
U-2KW system, the HB and LB HPA cabinets are located on either side of the
control cabinet. Each cabinet is accessible through removable front and rear panels.
The HPA cabinet is cooled using a single fan/blower and air intakes located on the top and
rear (bottom) panels. The operating temperature for the HPA cabinet is 32°F to +131°F
(0°C to +55°C).
Two (2) temperature sensors are mounted in the HPA cabinet: One is mounted below the
bottom HPA compartment frame, allowing the system to monitor the temperature of the air
being drawn into the cabinet, while the other is mounted below the fan/blower, allowing the
system to monitor the temperature of the air being exhausted from the cabinet.
The following components are housed within the HPA cabinet and are accessible through the
front door only:
 4x High Power Amplifier Power Supply Units (HPA PSU’s), with 8x Rectifier Modules
 8x High Band High Power Amplifiers (HPA’s)
 2x Power Distribution Units (PDU’s)
The following components are housed within the HPA cabinet and are accessible through the
rear door only:
 Transmission Sub-system Controllers (TSC)
 2-way Splitter
 2x 4-way Splitters
 2x 4-Way Hybrid Combiners w/Loads
 3x HPA/TSC Transmit Output Coupler/RF Detectors
 Magic Tee w/Load
The inside rear panel includes a number of bulkhead connectors used to interconnect
components in the HPA cabinet with components in the other cabinets.
NOTE: The list of components housed within the HB HPA cabinet and LB HPA cabinet is
identical.
SX03-30000-01-M01
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