User Manual

ManualsBrandsADC Telecommunications ManualsElectronicsDigivanceÂ® Long Range Coverage Solution 1900 MHz

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Table Of Contents

SECTION 4: Operation
- 1 before starting operation
  - 1.1 Tools and Materials
  - 1.2 Readiness Check
    - 1.2.1 Host Unit Installation Checks
    - 1.2.2 Remote Unit Installation Checks
- 2 turn-up system and verify operation

ADCP-75-126 • Issue B • April 2002 • Section 3: Host Unit Installation

Page 3-9

©

2002,

ADC

Telecommunications,

Inc.

In

many

installations,

it

is

usually

necessary

to

install

an

external

attenuator

in

the

forward

path

link

between

the

HU

and

the

BTS.

The

procedure

for

determining

the

value

of

the

external

attenuator

is

provided

in

SECTION

4:

OPERATION.

The

HU

should

be

mounted

as

close

as

possible

to

the

BTS

to

minimize

cable

losses.

Use

the

following

procedure

to

route

the

forward

and

reverse

path

coaxial

cables

and

connect

them

to

the

HU:

1. Obtain

the

required

lengths

of

high

performance,

flexible,

low

loss

50-ohm

coaxial

communications

cable

(RG-400

or

equivalent)

for

all

coaxial

connections.

2. Route

the

forward

and

reverse

path

coaxial

cables

and

the

diversity

reverse

path

cable

(if

the

HU

supports

diversity)

between

the

HU

and

the

BTS

interface

(per

system

design

plan)

and

cut

to

the

required

length.

Allow

sufficient

slack

for

dressing

and

organizing

cables

at

the

HU

and

for

installing

an

external

attenuator

in

the

forward

path

link.

3. Terminate

each

cable

with

a

type

N

male

connector

following

the

connector

supplier’s

recommendations.

4. Connect

the

forward

path

cable

to

the

FORWARD

RF

IN

connector

on

the

HU

front

panel

as

shown

in

Figure 3-8.

Figure 3-8. Forward and Reverse Path Coaxial Cable Connections

5. Connect

the

reverse

path

cable

to

the

REVERSE

RF

OUT

connector

on

the

HU

front

panel

(see

Figure 3-8).

6. If

the

HU

supports

diversity,

connect

the

diversity

reverse

path

cable

to

the

REVERSE

2

RF

OUT

connector

on

the

HU

front

panel

(see

Figure 3-8).

7. Dress

and

secure

cables

at

the

HU.

8. Complete

all

remaining

coaxial

connections

at

the

BTS

interface

as

specified

in

the

system

design

plan.

16887-A

TYPE-N MALE



CONNECTOR

FORWARD RF IN



CONNECTOR



(FORWARD PATH)

REVERSE



RF OUT CONNECTOR



(REVERSE PATH)

REVERSE 2



RF OUT CONNECTOR



(DIVERSITY REVERSE PATH)