User Manual

ADCP-75-116 • Issue A • August 2001 • Section 2: Description
Page 2-2
© 2001, ADC Telecommunications, Inc.
6 DIGVANCE ELEMENT MANAGEMENT SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
6.1 Primary Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
6.2 Service Interface Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
6.3 NOC Interface Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
6.4 EMS Software User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
7 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
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1 INTRODUCTION
This section describes the basic components of the Digivance LRCS including the Host Unit
(HU), the Remote Unit (RU), and the Alarm Network Unit (ANU). Note that the RU is actually
an assembly that consists of a cabinet, a Spectrum Transport Module (STM), and a Linear
Power Amplifier (LPA) module. For clarity, the various components that comprise the RU are
described separately.
2 HOST UNIT
The HU, shown in Figure 2-1, serves as the BTS servicing unit for the Digivance LRCS. The
HU provides the following basic functions:
• Provides an adjustable RF interface with the BTS.
• Provides an optical interface with the RU.
• Digitizes the forward path composite RF signal.
•Converts the digitized forward path RF signal to a digital optical signal.
•Converts the digitized reverse path optical signal to a digitized RF signal.
•Converts the digitized reverse path RF signal to a composite RF signal.
• Signals alarm information to an external alarm system through relay contact closures
• Provides an RS-232 interface for a local or remote management system.
• Provides a CAN interface for networking multiple HUs.
2.1 Primary Components
The HU consists of an electronic circuit board assembly and a fan assembly that are mounted
within a powder-coated sheet metal enclosure. The enclosure provides a mounting point for the
circuit board and fan assemblies and controls RF emissions. The only user-replaceable
component is the fan assembly. The HU is designed for use within a non-condensing indoor
environment such as inside a wiring closet or cabinet. All controls, connectors, and indicators
(except the power terminal strip) are mounted on the HU front panel for convenient access.
Cable management functions for the coaxial and fiber optic cables are provided by a cable
management tray that extends outward from the HU front panel.