User Manual

ManualsBrandsADC Telecommunications ManualsElectronicsDigivance 800 MHz Indoor Coverage Solution

ADCP-75-110 • Issue B • March 2001

Page 18

©

2001,

ADC

Telecommunications,

Inc.

2.2 Location and Mounting Requirements

2.2.1 DHU and DEU Location and Mounting Requirements

The

DHU

and

the

DEU

may

be

either

rack

mounted

or

wall

mounted.

Fasteners

(both

metric

and

US

standard)

are

included

with

each

unit

for

rack

mount

applications.

A

pair

of

reversible

mounting

brackets

is

provided

that

allows

the

unit

to

be

mounted

in

either

a

19-inch

or

23-inch

EIA

or

WECO

equipment

rack.

When

rack-mounted,

the

front

panel

of

the

unit

is

flush

with

the

front

of

the

rack.

The

cable

management

tray

extends

3.9

inches

(99

mm)

beyond

the

front

panel.

Both

the

DHU

and

DEU

occupy

3.5

inches

(89

mm)

of

rack

space.

Make

sure

the

mechanical

loading

of

the

rack

will

be

even

to

avoid

a

hazardous

condition

such

as

a

severely

unbalanced

rack.

The

rack

should

safely

support

the

combined

weight

of

all

the

equipment

it

holds.

For

wall-mount

applications

of

the

DHU

or

DEU,

a

pair

of

holes

is

provided

in

the

cable

management

tray

that

allows

the

unit

to

be

mounted

on

any

flat

vertical

surface.

The

mounting

holes

are

spaced

11.66

inches

(296

mm)

apart.

Orient

the

DHU/DEU

so

the

front

panel

faces

up

when

mounted.

Appropriate

fasteners

for

wall

mounting

must

be

provided

by

the

installer.

It

is

recommended

that

a

backer

board

such

as

3/4-inch

plywood

be

installed

over

the

mounting

surface

to

provide

a

secure

base

for

attaching

the

DHU

or

DEU.

Mount

the

DHU

and

DEU

in

a

non-condensing

indoor

environment

such

as

inside

a

wiring

closet

or

within

an

environmentally

controlled

cabinet.

All

controls,

connectors,

and

indicators

are

mounted

on

the

front

panel.

Route

all

cables

to

the

front

panel

for

connection.

Use

the

cable

retainers

provided

on

the

cable

management

tray

to

secure

the

fiber

optic,

DC

power,

and

local

alarm

system

cables.

The

maximum

recommended

ambient

temperature

for

the

DHU

and

DEU

is

50º

C

(122º

F).

Allow

sufficient

air

circulation

or

space

between

each

unit

when

installed

in

a

multi-unit

rack

assembly

because

the

operating

ambient

temperature

of

the

rack

environment

might

be

greater

than

room

ambient.

Provide

a

minimum

clearance

of

3

inches

(76

mm)

on

both

the

left

and

right

sides

of

the

unit

for

air

intake

and

exhaust.

Refer

to

Figure

2

for

the

DHU

dimensions

and

Figure

6

for

the

DEU

dimensions.

2.2.2 DRU Location and Mounting Requirements

The

DRU

may

be

wall-mounted

or

ceiling-mounted.

The

DRU

is

equipped

with

four

integral

mounting

feet

that

allow

it

to

be

fastened

to

any

flat

vertical

or

horizontal

surface.

Holes

are

provided

in

the

mounting

feet

for

inserting

fasteners.

Appropriate

fasteners

for

securing

the

DRU

to

the

selected

mounting

surface

must

be

provided

by

the

installer.

Mount

the

DRU

in

a

non-condensing

indoor

environment.

Route

the

DC

power

cable

and

fiber

optic

links

to

the

DRU

front

panel

for

connection.

Route

the

antenna

coaxial

cable

to

the

DRU

rear

panel

for

connection.

Provide

a

minimum

of

3

inches

(76

mm)

of

clearance

space

(more

if

cover

will

be

required)

on

all

sides

of

the

DRU

(except

the

bottom)

to

ensure

there

is

adequate

air

circulation

for

cooling.

In

addition,

at

least

one

surface

of

the

DRU

installation

area

must

be

open

to

the

interior

of

the

building.

Refer

to

Figure

4

for

the

DRU

dimensions.