User Manual

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Table Of Contents

SECTION 3: Host Unit Installation

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

Page 2-17

©

2002,

ADC

Telecommunications,

Inc.

Figure 2-7. Linear Power Amplifier

5.1 Primary Components

The

LPA

consists

of

several

electronic

circuit

board

assemblies

and

two

fan

assemblies

that

are

mounted

within

a

powder-coated

sheet

metal

enclosure.

The

metal

enclosure

provides

a

mounting

point

for

the

electronic

components

and

controls

RF

emissions.

Except

for

the

fan

units,

the

electronic

components

are

not

user

replaceable.

The

LPA

is

designed

for

use

within

the

RU

cabinet.

Except

for

the

STM

interface

connector,

all

controls,

indicators,

and

switches

are

mounted

on

the

LPA

front

panel

for

easy

access.

A

carrying

handle

is

provided

on

the

front

of

the

LPA

to

facilitate

installation

and

transport.

5.2 Mounting

The

LPA

mounts

on

a

shelf

within

the

RU

cabinet.

Runners

on

the

top

and

bottom

of

the

LPA

mesh

with

tracks

on

the

mounting

shelf.

The

runners

and

tracks

guide

the

LPA

into

the

installed

position.

The

electrical

interface

between

the

STM

and

LPA

is

supported

by

a

D-sub

female

connector

located

on

the

rear

side

of

the

LPA.

A

corresponding

D-sub

male

connector

mounted

at

the

rear

of

the

RU

cabinet

mounting

shelf

mates

with

the

LPA

connector.

Captive

screws

are

provided

for

securing

the

LPA

to

the

mounting

shelf.

17546-A

LPA 1940