User Manual

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Table Of Contents

ADCP-75-116 • Issue A • August 2001 • Section 4: Operation

Page 4-15

©

2001,

ADC

Telecommunications,

Inc.

Figure 4-11. Remote Fwd Att Pop-Up Screen

5. Enter

the

required

attenuation

value

and

click

OK

to

close

the

pop-up

screen

and

to

make

the

changes

take

effect.

6. Verify

that

the

appropriate

RF

output

signal

level

appears

in

the

RF

Pwf-VSWR

Low

section

(see

Figure 4-10).

2.8 Enter Host Reverse Attenuation

The

level

of

the

RF

signal

that

should

be

input

to

the

BTS

will

vary

depending

on

the

type

of

BTS

and

the

number

of

channels

present.

To

interface

with

the

BTS,

the

reverse

path

signal

level

must

be

adjusted

to

provide

the

signal

level

required

by

the

BTS.

The

HU

provides

from

0

to

30

dB

of

gain

in

the

reverse

path.

Use

the

following

procedure

to

set

the

reverse

path

gain:

1. Check

the

BTS

manufacturer’s

specifications

to

determine

the

composite

signal

level

required

at

the

BTS

reverse

path

input

port.

Table 4-2. Maximum Composite Output Signal Levels

NUMBER OF

CHANNELS

MAXIMUM OUTPUT

SIGNAL LEVEL

137

dBm

240

dBm

341

dBm

443

dBm

544

dBm

6

or

more 45

dBm

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.