User's Manual

Chapter 2 System Description
2.3.17 Output Filter Network (OFN) Cabinet
The outp
ut filter network (OFN) cabinet is an indoor/outdoor enclosure, located behind the
control cabinet, between the HB and LB HPA cabinets.
The OFN cabinet is used to house the transmit output filters, which are accessible through
removable front and rear panels. Once the DRU-2KW system is fully assembled, the front
of the OFN cabinet is no longer accessible as it is located immediately behind the control
cabinet.
The OFN cabinet is cooled through natural convection as louvers located on the front and
rear panels allow for air circulation in the cabinet.
The following components are housed within the Combined DRU OFN cabinet:
 HB Transmit Output Filter (WG)
 LB Transmit Output Filter (WG)
 LBD Transmit Output Filter (DR)
 Diplexer
 DRU Transmit Output Coupler/RF Detector
The following components are housed within the Independent DRU OFN cabinet:
 HB Transmit Output Filter (WG)
 LB Transmit Output Filter (WG)
 LBD Transmit Output Filter (WG)
 Diplexer
 2x DRU Transmit Output Coupler/RF Detector’s
In a Combined DRU, the diplexer combines the LB and HB transmit signals on a single
output interface. In this configuration, the LBD transmit signal has an independent output
interface.
In an Independent DRU, the diplexer combines the HB and LBD transmit signals on a single
output interface. In this configuration, the LB transmit signal has an independent output
interface.
SX03-30000-01-M01
2-37