User Manual

ManualsBrandsADC Telecommunications ManualsElectronics1900 MHz Remote Interface Unit

ADCP-75-114 • Issue 2C • January 2002

Page 16

©

2002,

ADC

Telecommunications,

Inc.

3 OPERATION

This

section

provides

guidelines

for

turning-up

the

RIU,

verifying

that

the

RIU

is

operating

properly,

setting

the

forward

and

reverse

path

signal

levels,

and

correcting

any

installation

problems.

3.1 Tools and Materials

The

following

tools

and

materials

are

required

in

order

to

complete

the

procedures

in

this

section:

•

RF

power

meter

•

Pencil

or

pen

•

Writing

pad

3.2 Turn-Up Unit and Verify Operation

The

process

of

turning-up

the

RIU

and

verifying

operation

involves

setting

the

forward

and

reverse

path

signal

levels,

turning

on

the

power,

verifying

that

the

LED

indicator

shows

normal

operation,

and

then

measuring

the

forward

and

reverse

path

signal

levels.

Refer

to

Table

3

for

a

detailed

description

of

the

ALARM

LED

indicator.

Table 3. Remote Interface Unit LED Indicator

INDICATOR COLOR DESCRIPTION

ALARM

Green

Yellow

Red

Off

Indicates

if

the

RIU

is

normal

or

if

a

fault

is

detected.

RIU

in

normal

state,

no

faults

detected.

High

temperature

fault

detected.

(Minor

alarm)

Over

or

undercurrent

fault

on

power

amplifier

detected.

(Major

alarm)

AC

power

off

or

RIU

internal

fault.

Use

the

following

procedure

to

power-up

the

system:

1.

Temporarily

disconnect

the

alarm

system

or

notify

the

alarm

system

provider

that

unit

turn-up

is

in

progress.

2.

Adjust

the

forward

and

reverse

path

signal

levels

as

specified

in

Sections

3.3

and

3.4.

3.

Verify

that

the

donor

antenna

is

properly

installed

and

connected.

Note:

To

comply

with

Maximum

Permissible

Exposure

(MPE)

requirements,

the

maximum

composite

output

from

the

antenna

cannot

exceed

1000

watts

EIRP

and

the

antenna

must

be

permanently

installed

in

a

fixed

location

that

provides

at

least

6

meters

(20

feet)

of

separation

from

all

persons.

4.

Verify

that

the

RIU

is

connected

to

the

appropriate

AC

outlet.

5.

Place

the

ON/OFF

switch

on

the

RIU

in

the

ON

position

(press

I).

6.

Verify

that

the

ALARM

LED

on

the

RIU

turns

green.