User Manual

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Table Of Contents

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

Page 4-14

©

2001,

ADC

Telecommunications,

Inc.

2.7 Enter Remote Forward Attenuation

The

STM

internal

forward

path

attenuator

setting

is

used

to

fine

tune

or

reduce

the

power

level

of

the

composite

output

signal

level

at

the

STM

antenna

port.

The

maximum

composite

output

signal

level

at

the

STM

antenna

port

is

set

using

the

Host

internal

forward

attenuator

(see

Section

2.4).

However,

component

variations

may

result

in

the

output

power

at

the

STM

antenna

port

being

slightly

above

or

below

the

specified

maximum

of

5

watts

per

channel.

If

this

is

the

case,

the

STM

forward

attenuator

may

be

used

in

conjunction

with

the

Host

forward

attenuator

to

add

or

remove

attenuation

to

produce

the

required

output

signal

level.

If

less

power

than

the

maximum

of

5

watts

per

channel

is

required,

the

STM

forward

attenuator

may

be

used

to

reduce

the

power

level

to

the

specified

level.

The

default

setting

is

0

dB.

Use

the

following

procedure

to

change

the

STM

forward

attenuation:

1. Click

on

the

REMOTE

PA

tab.

The

REMOTE

PA

display

will

open

within

the

EMS

main

window

as

shown

in

Figure 4-10.

Figure 4-10. REMOTE PA Display

2. Check

the

level

of

the

RF

output

signal

(as

determined

in

Section

2.6)

against

the

values

shown

in

Table 4-2.

3. Determine

if

more

or

less

attenuation

is

required

to

produce

the

required

output

signal

level.

4. Right-click

on

the

Remote

Fwd

Att

section

of

the

display

(see

Figure 4-10).

The

Remote

Fwd

Att

pop-up

screen

will

open

as

shown

in

Figure 4-11.

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.

Right-click here to

open the Remote Fwd

Att pop-up screen

RF output signal level