RTS BP300 Manual de servicio descargar pdf (Pagina 4)

CLEAR-COM

CP-300

BELT-PACK

STATION

&

TW-12

INTERFACE

UNIT

OPERATION

MANUAL

.

1.

INTRODUCTION

TO

THE

BELT-PACK

&

INTERFACE

The

Clear-Com

CP-300

is

a

portable

channel-selection

(A

or

B),

a

belt-pack

intercom

that

allows

com-

three-position

mic

switch

(on/off/

munication

on

two

channels,

using

momentary

on),

and

a

low-profile

standard

two-conductor

microphone

volume

control.

The

controls

are

cable.

The

CP-300

is

different

different

sizes

to

facilitate

ad-

from

other

Clear-Com

Stations

be-

justment

by

touch

only.

Al

I

con-

cause

it

requires

connection

to

an

trols

are

protected

by

the

raised

interface

unit,

Model

TW-12,

to

lip

of

the

belt-pack's

chassis.

utilize

its

full

capabilities.

Optional

Signalling

When

the

CP-300

is

used

in

its

two-

The

Visual

Signalling

function,

a

channel/two-wire

mode,

two

audio

typical

Clear-Com

feature,

is

con-

channels

are

transmitted

on

one

figured

differently

in

the

CP-300

cable:

channel

A

audio

and

DC

power

than

it

is

in

standard

Clear-Com

on

one

of

the

wires,

channel

B

Stations.

audio

on

the

other

wire.

The

Sys-

tem

must

include

the

TW-12

Inter-

The

CP-300

uses

a

20,000

Hz

signal,

face

when

two

intercom

channels

are

transmitting

it

on

the

audio

chan-

required

on

one

cable.

(Clear-Com

nel

selected

for

communicating

(A

typically

uses

one

cable

to

support

or

B).

This

signal

is

detected

by

one

audio

channel

plus

power,

or

it

the

other

CP-300's

which

are

using

uses

multi-pair

cable

for

two

or

that

same

channel

(A

or

B),

causing

O

more

channels.)

the

CP-300

call

lamps

to

light

up.

When

the

signalling

option

is

in-

The

CP-300

features

Clear-Com's

cluded

in

the

CP-300,

a

call

lamp/

excellent

speech

intelligibility

in

button

is

added

to

the

belt-pack's

all

high-

and

low-noise

environ-

chassis.

The

system

of

signalling

ments.

It

also

includes

a

mic

is

determined

by

the

one-channel/

limiter,

which

holds

the

output

two-channel

mode

switch

on

the

CP-

relatively

constant

over

a

30

dB

300

operation;

it

switches

the

input

range.

The

CP-300

has

the

signallirg

circuitry

from

DC

mode

same

pin-to-pin

connections

and

(standard

Clear-Com)

to

the

20k

Hz

functions

as

RTS

intercoms

(e.g.,

signal

used

in

the

'TW"

system.

RTS

Model

BP-300),

with

better

performance.

The

CP-300's

headset

amplifier

pro-

vides

power

to

drive

a

standard

A

unique

CP-300

feature

is

its

Clear-Com

headset

to

levels

grea-

switch-selectable

operation

as

a

ter

than

110

dB

SPL,

without

any

two-channel/two-wire

station

or

as

distortion.

The

belt-pack

operates

a

"standard"

one-channel

Clear-Con

with

either

a

dynamic

or

a

carbon

station.

It

operates

in

a

stand-

headset,

providing

an

input

connec-

alone,

two-channel

system

or

com-

tor

for

each

one.

bined

in

a

system

with

standard

Clear-Com

Stations.

Refer

to

the

The

CP-300

also

incorporates

"auto-

system

diagrams,

page

3.

matic

headset

detection,"

which

mutes

the

mic

pre-amp

when

the

Other

CP-300

features

include

its

headset

is

not

plugged

in.

There-

"user-friendly"

control

lay-out,

fore

an

unused

yet

on-line

belt-

including

the

rocker

switch

for

pack

doesn't

cause

background

noise.

(continued)

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