User Manual

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Table Of Contents

ADCP-75-126 • Issue B • April 2002 • Section 2: Description

Page 2-3

©

2002,

ADC

Telecommunications,

Inc.

Figure 2-1. Host Unit

2.2 Mounting

The

HU

is

intended

for

rack-mount

applications.

A

pair

of

reversible

mounting

brackets

is

provided

that

allow

the

HU

to

be

mounted

in

either

a

19-inch

or

23-inch

EIA

or

WECO

equipment

rack.

When

installed,

the

front

panel

of

the

HU

is

flush

with

the

front

of

the

rack.

The

cable

management

tray

extends

3.9

inches

(99

mm)

beyond

the

front

panel.

Fasteners

are

provided

for

securing

the

HU

to

the

equipment

rack.

2.3 Fault Detection and Alarm Reporting

The

HU

detects

and

reports

various

faults

including

host

unit

fault,

optical

fault,

power

fault,

temperature

fault,

and

RF

fault.

Various

front

panel

Light

Emitting

Diode

(LED)

indicators

turn

from

green

to

red

or

yellow

if

a

fault

is

detected.

A

set

of

alarm

contacts

(normally

open

and

normally

closed)

are

provided

for

reporting

an

alarm

to

an

external

alarm

system

when

a

fault

is

detected.

Both

major

alarm

(system

operation

seriously

affected)

and

minor

alarm

(system

operation

not

affected

or

only

slightly

degraded)

contacts

are

provided.

The

status

of

the

HU,

the

alarm

state

(major

or

minor),

and

other

alarm

information

is

summarized

and

reported

over

the

service

interface,

the

CAN

interface,

and

also

over

the

optical

fiber

to

the

RU.

In

addition,

the

state

of

the

RU

is

received

over

the

optical

fiber

and

reported

over

the

service

interface

and

the

CAN

interface.

This

information

may

be

accessed

remotely

through

the

NOC/NEM

interface

or

locally

through

the

EMS

software

GUI.

2.4 RF Signal Connections

The

RF

signal

connections

between

the

HU

and

the

BTS

are

supported

through

either

two

(non-

diversity

unit)

or

three

(diversity

unit)

N-type

female

connectors.

On

non-diversity

units,

one

connector

is

used

for

the

forward

path

RF

signal.

The

other

connector

is

used

for

the

reverse

path

RF

signal.

On

diversity

units,

a

third

connector

is

used

for

the

diversity

path

RF

signal.

In

17.2 INCHES



(437 mm)

3.5 INCHES



(89 mm)

11.4 INCHES



(290 mm)

15.3 INCHES



(389 mm)

FRONT PANEL

CABLE MANAGEMENT



TRAY

MOUNTING



BRACKET



(BOTH SIDES)

16796-A