User's Manual Part 1

ADCP-75-187 • Preliminary Issue 1B • November 2005 • Section 2: DESCRIPTION
Page 2-10
© 2005, ADC Telecommunications, Inc.
the forward path RF signal. The aluminum enclosure provides a mounting point for the
electronic assemblies, controls RF emissions, seals out dirt and moisture, and provides passive
cooling. The electronic assemblies are not user replaceable or accessible. All connectors and
indicators are mounted on the bottom of the RU enclosure for easy access.
The single-band version of the RU consists of one STM and one LPA mounted within the same
enclosure. The dual-band version, shown in Figure 2-4, consists of two STM’s and two LPA’s
mounted within the same enclosure. The dual-band version makes it possible to support two
separate frequency bands with a single RU.
Figure 2-4. Dual-Band Remote Unit
3.2 Mounting
The RU may be mounted on a flat vertical surface (such as the side of a building) or on a utility
pole. A combination wall/pole mounting bracket is provided with each unit. A separate strand-
mount kit (accessory item) is available if it is necessary to mount the RU from a cable. A
grounding lug is provided on the bottom of the RU enclosure for connecting a grounding wire.
3.3 Fault Detection and Alarm Reporting
The RU detects and reports various faults including remote unit fault, optical fault, output power
fault, temperature fault, and power amplifier fault. A single bottom-mounted Light Emitting
Diode (LED) indicator turns from off to red if a major fault is detected. The status of the STM
and LPA, the alarm state, and other fault information is summarized and reported over the
optical interface to the HU. Fault and alarm information may be accessed at the HU through the
EMS software GUI or remotely through the NOC/NEM interface or SNMP interface.
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