User Manual

ManualsBrandsADC Telecommunications ManualsElectronicsDigivance Indoor Coverage Solution System

ADCP-75-136 • Issue 1 • November 2002

Page 52

©

2002,

ADC

Telecommunications,

Inc.

3.

Disconnect

the

optical

connectors

at

the

DHU

or

supporting

DEU

and

at

the

corresponding

DRU

or

remote

DEU.

4.

Inspect

the

optical

connectors.

Verify

that

each

connector

is

clean

and

that

no

scratches

or

imperfections

are

visible

on

the

fiber

end.

Clean

and

polish

the

optical

connector

if

necessary.

5.

Connect

a

laser

light

source

to

one

end

of

the

first

optical

fiber

and

an

optical

power

meter

to

the

other

end.

6.

Verify

that

the

power

loss

is

within

specifications

(8

dB

loss)

for

the

length

of

the

fiber

installed.

If

the

power

loss

is

not

within

specifications,

repair

or

replace

the

optical

fiber

and/or

connector

per

local

practice.

7.

Repeat

steps

5

and

6

for

the

second

optical

fiber.

8.

Reconnect

the

optical

connectors

at

the

DHU

or

supporting

DEU

and

the

corresponding

DRU

or

remote

DEU.

9.

At

the

DHU

or

supporting

DEU,

place

the

PORT

ON/OFF

switch

for

the

fiber

that

was

tested

in

the

ON

position

(press

I).

6.4.3 DC Power Test Procedure

The

DRU

is

powered

by

34–48

Vdc

power

which

is

supplied

through

the

RJ-45

connector.

Power

to

the

DRU

may

be

supplied

by

the

DHU,

DEU,

or

by

a

120

Vac

to

48

Vdc

power

converter

(available

separately

as

an

accessory

item)

plugged

into

a

properly

grounded

120

Vac

outlet.

Use

the

following

procedure

to

test

the

DC

power

cable:

1.

Disconnect

the

DC

power

cable

from

the

DRU.

2.

Connect

the

RJ-45

circuit

access

tool

to

the

DRU

as

shown

in

Figure

28.

POWER

PORT

POWER

CONNECTOR

RJ-45 CIRCUIT

ACCESS TOOL

17284-A

Figure 28. Connect RJ-45 Circuit Access Tool