User Manual

ADCP-75-159 • Issue 1 • August 2003 • Section 1: Overview

Page 1-9

The EMS software is used to provision and configure the Digivance system for operation. This

includes selecting a sitename, setting alarm thresholds, and setting forward and reverse path RF

gain adjustments. The EMS software is also used to get alarm messages (individual or

summary), data measurements, or to upgrade the HU/RU system software. All control and

monitor functions (except software upgrade which can only be done using the EMS software

GUI) can be effected using either the NOC/NEM interface or the EMS software GUI.

3.3 Fault Detection and Alarm Reporting

LED indicators are provided on the front panel of the HU and on the front panels of the RU

modules to indicate if the system is normal or if a fault is detected. In addition, normally open

and normally closed alarm contacts (for both major and minor alarms) are provided at the HU

for connection to a customer-provided external alarm system. All alarms can also be accessed

through the NOC/NEM interface or the EMS software GUI.

3.4 Powering

The HU is powered by ±24 or ±48 VDC and must be hard-wired to a local office battery power

source through a fuse panel. A screw-down terminal strip is provided on the rear side of the HU

for the power connections.

The RU is powered by 120 or 240 VAC (50 or 60 Hz) and must be connected to an AC power

source through a 20 Amp breaker box. A three-wire cable is provided for the AC power

connections. A 120 VAC outlet should be installed near the RU for powering test equipment or

power tools. In certain applications, it may be necessary to install a surge protector (not

provided) in the AC power feed to prevent equipment damage from AC power spikes.

3.5 Equipment Mounting and Configuration

The HU is designed for mounting in a non-condensing indoor environment such as inside a

wiring closet or within an environmentally-controlled cabinet. The HU is intended for rack-

mount applications and may mounted in either a 19- or 23-inch WECO or EIA equipment rack,

usually within 20 feet of the EBTS.

The outdoor RU is designed for mounting in an outdoor environment. The outdoor RU consists

of a Spectrum Transport Module (STM), a Linear Power Amplifier (LPA) module, and a self-

contained cabinet which houses the modular components and protects them from the elements.

The RU cabinet is weather-tight but contact with salt-air mist should be avoided as it may

degrade the MTBF of the product. The outdoor cabinet can be mounted from a flat-vertical

surface, from a utility pole (requires pole-mount kit), or mounted on a pedestal (requires

pedestal kit). Slots are provided within the cabinet for the STM and LPA modules. Storage

spools are provided for storing short lengths of excess fiber slack. A mounting slot is also

provided for a WDM or CWDM remote module (accessory items). A lighting protector for the

antenna is included with the outdoor cabinet to prevent equipment damage from lighting strikes.