User's Manual

ManualsBrandsADC Telecommunications ManualsElectronicsDigivance 1900 MHz Indoor Coverage Solution

ADCP-75-110 • Issue 2B • July 2001

Page 10

©

2001,

ADC

Telecommunications,

Inc.

FRONT PANEL

CABLE MANAGEMENT

TRAY

MOUNTING

BRACKET

(BOTH SIDES)

16422-A

3.5 INCHES

(89 mm)

11.4 INCHES

(290 mm)

15.3 INCHES

(389 mm)

17.2 INCHES

(437 mm)

Figure 6. Digital Expansion Unit

1.4.1 Primary Components

The

DEU

consists

of

two

electronic

circuit

board

assemblies

and

a

power

supply

that

are

mounted

within

a

powder-coated

sheet

metal

enclosure.

The

metal

enclosure

provides

a

mounting

point

for

the

electronic

assemblies

and

serves

as

a

heat

sink.

Except

for

the

fan

units,

the

electronic

circuit

board

assemblies

are

not

user

replaceable.

The

DEU

is

designed

for

use

within

a

non-condensing

indoor

environment

such

as

inside

a

wiring

closet

or

cabinet.

All

controls,

connectors,

and

indicators

are

mounted

on

the

DEU

front

panel

for

convenient

access.

Cable

management

functions

for

the

power

and

fiber

optic

cables

are

provided

by

a

cable

management

tray

that

extends

outward

from

the

DEU

front

panel.

1.4.2 Mounting

The

DEU

may

be

used

in

both

rack-mount

and

wall-mount

applications.

For

rack

mount

applications,

a

pair

of

reversible

mounting

brackets

is

provided

that

allow

the

DEU

to

be

mounted

in

either

a

19-inch

or

23-inch

EIA

or

WECO

equipment

rack.

When

rack-mounted,

the

front

panel

of

the

DEU

is

flush

with

the

front

of

the

rack.

The

cable

management

tray

extends

3.9

inches

(99

mm)

beyond

the

front

panel.

For

wall-mount

applications,

a

pair

of

holes

is

provided

in

the

cable

management

tray

which

allow

the

DEU

to

be

mounted

on

any

flat

vertical

surface.

The

DEU

should

be

oriented

with

the

front

panel

facing

upward

when

wall-mounted.

Fasteners

are

provided

for

rack-mount

applications.

1.4.3 Fault Detection

The

DEU

is

designed

to

detect

internal

circuitry

faults

or

loss

of

system

inputs.

Various

front

panel

Light

Emitting

Diode

(LED)

indicators

turn

from

green

to

red

or

yellow

when

a

fault

is

detected

or

when

an

optical

input

is

lost.

The

DEU

transports

the

fault

information

to

the

DHU

or

supporting

DEU

over

the

fiber

optic

link.

A

corresponding

port

LED

at

the

DHU

or

DEU

turns

from

green

to

red

when

the

DEU

reports

a

fault.