User Manual

ManualsBrandsADC Telecommunications ManualsElectronics1900 MHz Remote Interface Unit

ADCP-75-114 • Issue 2C • January 2002

Page 13

©

2002,

ADC

Telecommunications,

Inc.

1.

Obtain

the

required

length

of

high

performance,

flexible,

low

loss

50-ohm

coaxial

communications

cable

for

the

antenna

coaxial

connection.

2.

Route

the

coaxial

cable

between

the

RIU

and

the

donor

antenna

(per

system

design)

and

cut

to

the

required

length.

Allow

sufficient

slack

for

dressing

and

organizing

cables

at

the

RIU

and

antenna.

3.

Terminate

each

cable

end

with

a

type

N

male

connector

following

the

connector

supplier’s

recommendations.

4.

Connect

the

RIU

end

of

the

antenna

cable

to

the

ANTENNA

connector

on

the

RIU

front

panel

as

shown

in

Figure

10.

5.

Connect

the

antenna

end

of

the

antenna

cable

to

the

donor

antenna.

6.

Dress

and

secure

cables

at

the

RIU

and

donor

antenna.

16653-A

ANTENNA

CONNECTOR

TYPE-N MALE CONNECTOR

Figure 10. RIU Antenna Cable Connection

2.6 External Alarm System Connections

The

alarm

interface

between

the

RIU

and

an

external

alarm

system

is

supported

by

a

six-

terminal

plug

(with

screw-type

terminals)

that

connects

to

a

receptacle

on

the

RIU

front

panel.

The

terminal

plug

provides

connections

to

normally

open

(NO)

and

normally

closed

(NC)

dry

type

alarm

contacts

for

both

minor

and

major

alarms.

A

category

3

or

5

cable

is

typically

used

to

connect

the

RIU

to

the

external

alarm

system.

Use

the

following

procedure

to

install

the

alarm

wiring

and

connect

it

to

the

RIU: