User Manual

ManualsBrandsADC Telecommunications ManualsElectronicsDigivance 800 MHz Indoor Coverage Solution

ADCP-75-110 • Issue B • March 2001

Page 4

©

2001,

ADC

Telecommunications,

Inc.

• Distribution

of

the

digitized

forward

path

RF

signals

into

six

digitized

optical

signals

• Conversion

of

up

to

six

reverse

path

digitized

optical

signals

to

six

digitized

RF

signals

• Combining

of

the

six

digitized

RF

signals

into

a

single

composite

digitized

RF

signal

• Conversion

of

the

combined

digitized

RF

signal

to

a

composite

cellular

RF

signal

• DC

power

for

powering

the

DRUs

• Relay

contact

closures

to

provide

alarm

information

to

an

external

alarm

system

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)

Fig 2A-A

Figure 2. Digital Host Unit

1.2.1 Primary Components

The

DHU

consists

of

two

electronic

circuit

board

assemblies

and

a

power

supply

assembly

that

are

mounted

within

a

powder-coated

sheet

metal

enclosure.

The

metal

enclosure

provides

a

mounting

point

for

the

electronic

assemblies,

serves

as

a

heat

sink,

and

controls

RF

emissions.

Except

for

the

fan

units,

the

electronic

circuit

board

assemblies

are

not

user

replaceable.

The

DHU

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

DHU

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

DHU

front

panel.

1.2.2 Mounting

The

DHU

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

DHU

to

be

mounted

in

either

a

19-inch

or

23-inch

EIA

or

WECO

equipment

rack.

When

rack-mounted,

the

front

panel

of

the

DHU

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

DHU

to

be

mounted

on

any

flat

vertical

surface.

The

DHU

should

be

oriented

with

the

front

panel

facing

upward

when

wall-mounted.

Fasteners

are

provided

for

rack-mount

applications.