Clear-Com CS-100, CS-200, CS-100K, KB-111, RS-100A Instruction And Service Manual

CLEAR-COM

INSTRUCTION

MANUAL

INTRODUCTION

1 . 1

GENERAL

The

Clear-Com

system

is

a closed

circuit

intercommunication system

designed for

clear-

two-way

communication in high noise environments.

Low

impedance

lines

(200

ohms)

and

specially

designed

circuitry

make

the

system

virtually

immune

to

RF

and

dimmer

noise.

The

basic system consists

of a

main

station

and

from

one

to

40

remote

stations,

joined

by

inter-

connecting cable.

Main

stations

are available in portable cases (single

channel

CS-100

and

dual-channel CS-200),

as

well

as

rack-mountable enclosures

(CS-100K

and

CS-200K).

There are several interchangeable

remote

stations:

the

RS-100A

"belt

pack", the

KB-100

liKing

Biscuit" mic/speaker

unit,

the

MR-102

wall-mount

unit,

the KB-lll wall

mount

unit

with speaker,

and

the

KB-lllP portable

remote

unit with speaker.

The

master gain

control,

located

on

the

main

station

rear

panel, allows the operator to

set

the overall gain

in accordance with the

number

of

remote

stations

being used.

All

remote

stations,

except the

MR-102,

have

adjustable side tone

which

enables the user to vary the

amount

of his or her

own

voice in the

headset, handset or speaker

for

maximum

intelligibility

with

minimum

chance

of feedback.

All

remote

stations

have

their

own

volume

control

for

ad-

justing

the level in the earpiece

(s),

call

switches

and

call

lights

for

signaling

from

other

stations.

Clear-Com

is a distributed

amplifier system, with each remote

station

housing

its

own

mic

preamplifier

and

headset

power

amplifier

(+20dBm

max

output).

The

main

station

supplies

28V

dc

necessary for operating

all

circuits,

and

power

is

carried

to remote

stations

via the

same

interconnecting

cable

which

carries

the audio

signals.

The

main

stations

also

have

an

auxiliary,

line-level

input with

its

own

volume

control

which

allows

mixing

of

an

external

program

with the intercom

line.

This

is

useful for

program

monitoring.

A power-supply only

main

station

is

available,

the

model

PS-3000.

Standard microphone cables

(XLR-3

type connectors) are

used

for

inter-

connection in

most

cases; the

WP-l

and

WP-2

wall-mount connector

plates

may

be

used

in

some

permanent

installations.

Interconnect

cables,

and

a

4-way

splitter

(the Quadropuss) are

available

from

Clear-Com.

- 1 -

78

SECTION

II

I

NSTALLA

TI

ON

2.1

EQUIPMENT

SELECTION

2.1.1

FIXED

SYSTEM

MAIN

STATIONS

For

permanent intercom systems,

main

station

equipment

is

usually

mounted

in a standard

19"

rack

fo

,r

security

and

convenience. For

this

reason,

we

recommend

either

the

CS-100K

single-channel

main

station

or

the

CS-200K

dual-channel

main

station.

However,

if

an

intercom

station

is

not needed

at

the area where the equipment rack

is

located,

then the

PS-3000

power

supply (without intercom

station)

should

be

s~bstituted.

2.1.2

FIXED

SYSTEM

REMOTE

STATIONS

In

permanent

installations,

it

is

usually

desireable

to run

inter-

connecting cables through

conduits,

and

to bring

them

to

wall-mounted

remote

stations,

or to wall

plates

for

connection to

portable

remote

stations.

We

recommend

the

MR-102

wall-mount remote

station,

or the

KB-lll

wal l mount

remote

station

with paging speaker.

If

you

don't

wish to

have

the remote

station

built

into

the

wall,

then use our

WP-l

or

WP-2

wall

plates

with

any

of

our

portable

remote

stations;

the

RS-100A

IIbelt pack", the

KB-100

liKing

Biscuit

ll

mic/speaker

station,

or the KB-lllP headset/handset

station

with paging speaker.

2. 1

.3

PORTABLE

SYSTEM

MAIN

STATIONS

For

portable

intercom systems,

main

station

equipment

must

be

compact,

lightweight,

and

easily

moved

for

storage.

The

CS-100

single-

channel

main

station

and

CS-200

dual-channel

main

station

fulfill

these

requirements.

2.

1.4

PORTABLE

SYSTEM

REMOTE

STATIONS

The

RS-100A

"belt

pack"

is

the

key

to our

truly

flexible

portable

intercom system. Because each

RS-100A

has a pair

of input

and

extension

connectors,

many

stations

may

be

"daisy chained"

together

along

one

interconnect path. This saves cable

and

simplifies

installation

and

break

down.

The

KB-'lOO

liKing

Biscuit

ll

mic/speaker remote

station

is

ideal

for

use in remote trucks

and

in

studio

control rooms, as well as

on

stage

during setup

of

live

shows.

It

can

be

used

either

in

push-to-talk

mode,

or

in

an

optional IIhands-free

ll

mode

where

the speaker

and

microphone both

function

simu

H aneousl'y.

In

the

latter

mode,

2-way

cOrrTTlunication

is

possible

at

distances

up

to

three

or four

feet,

depending

on

ambient noise

levels.

- 2 -

1/78

- - - - - - - - - - - - - - - - - - - -

--

2.1.5.

CLEAR-COM

HEADSETS

AND

HANDSETS

Clear-Com

has

three standard headsets

available,

all

with

boom-

mounted,

noise-cancelling microphones.

The

CC-240

is

a double-muff

headset, ,

and

the

CC-75

is

a single-muff headset, both with boom-activated

mics.

The

PH-7

is

a double

muff

headset

which

has

wider frequency response,

greater

isolation

from

ambient noise,

and

sturdier

physical construction

than the

CC-240,

and

no

mic

switch in the

boom.

All

units

have

fie1d-

replaceable cords.

The

HS-6

telephone-style handset

is

interchangeable

with the

above

headsets.

All remote

stations

can drive 2 headsets with only a

slight

reduction

in

level. A V-cord

can

be

made

up

using the diagram

below

and

the specified

wire. Extension cords for the headset

can

also

be

made

out

of

this

same

cable

or other separately shielded cable such as Belden 8734,

8416

or 9454.

Extensions should

be

limited to approximately 15'

due

to the

possibility

of

capacity coupling

between

the microphone signal

and

the headset signal

which

would

cause a loss

of

high

frequency response or

oscillation.

CAUTION:

DO

NOT

connect microphone

ground

and

earphone

ground

together

at

any

poi

nt.

A/.{F

I

..

-

C

dble:

B

e{

c{

en

- g7

31.(

-8Jflb

-9~S1

Y-Cord

2.1.6 .

OTHER

HEADSETS

Non-C1ear-Com

headsets are

available

from

Clear-Com

or local

dealers.

These

are

recommended

for special

applications:

Beyer

DT-108

Single-muff,

high-fidelity

earpiece with

boom

mic;

may

be

used

for

monitoring

and

intercom.

Shure

SM-12

Miniature, lightweight type with

boom

mic

and

hearing-aid type earpiece.

, '78

- 3 -

2.1.6

INTERFACE

TO

OTHER

COMMUNICATION

SYSTEMS

The

AC-10

Adapt-a-Com

is

a universal adapter

which

enables

Clear-Com

to

be

interfaced with

any

other intercom or communications

link.

When

existing

non-Clear-Com

installations

are being

upgraded

to

Clear-Com

equipment, portions of the older system

can

be

retained. Since

Adapt-a-Com

works

in 2-, 3-and

4-wire systems,

it

virtually

guarantees compatibility

with

any

house

intercom equipment.

Because

it

will simulate a carbon mic,

Adapt-a-Com

can

be

plugged

into the headset jack

on a TV

camera, control

unit,

or other 2-wire systems.

Adapt-a-Com

operates with telephone

company

and

competitive

model

3-wire

intercoms,

facilitates

on-line intercom via standard telephone systems,

and

aids in

direct

communication

between

the studio

and

remote locations via

2 or 4 wire dedicated

TEL.CO.

pairs.

2.1.7

AUDIO

ISOLATION

OF

PARTS

OF

THE

INTERCOM

SYSTEM

In

certain

applications,

it

may

be

desireable to

isolate

conversations

in

one

section

of

the system.

In

these instances, the

BA-l

in-line

isolator

may

be

used

to block audio while allowing

power

to

flow

to the

isolated

leg

of

the system. This inexpensive, passive device

creates

a quasi-dual channel

system

from

a single channel, except

that

the

main

station

cannot contact or

be

called

by

the

isolated

leg of the system.

The

BA-l

enables

you

to

have

private local conversations along a

common

interconnect cable without

need

for multiple cabling or several

main

stations.

Any

number

of

BA-lls

may

be

used,

so

long as the

power

capacity

of

the

main

station

is

not exceeded.

2.2

MAXIMUM

NUMBER

OF

STATIONS

AND

CABLE

CONSIDERATIONS

2.2.1

MAIN

STATION

CURRENT

AND

IMPEDANCE

LIMITS

All

Clear-Com

main

stations,

induding

the

PS-3000

power

supply,

have

the

same

maximum

output current capacity, 2

amps.

For

dual channel

main

stations,

the

total

current

draw

on

both channels cannot exceed 2

amps.

Due

to

impedance

considerations, regardless of the cable lengths or

mix

of

remote

stations,

40

stations

are the

maximum

that

can

be

driven

from

one

main

station.

(In

certain

circumstances,

it

may

be

possible to

use

more

than

40

stations;

contact the factory

for

details.)

2.2.2

CALCULATING

THE

MAXIMUM

NUMBER

OF

REMOTE

STATIONS

In

installations

with less than

500

feet

total

interconnecting cable,

only the

remote

station

current requirements

need

be

considered.

One

main

station

will support

up

to

40

RS-100A

or

MR-102

remote

stations,

or

up

to

15

KB-100

or KB-lll remote

stations.

1/78

- 4 -

1/78

When

calculating

the

maximum

current

drain,

only

two

figures

need

be

considered; a

maximum

current

drain

of

40

ma

in the

RS-100A

or

MR-102,

and

an

average

current

drain

of

130ma

in the

KB-100

or KB-lll. Thus,

an

equation

for

maximum

stations

would

be

as follows:

x =

Number

Of

RS-100A's +

MR-102

1

s <40.

Y

=

Number

of

KB-l

00

I s +

KB-

111

IS

< 15.

Therefore,

0.04X + 0.13Y

~

2.0

2.2.3

CABLES

Where

cable lengths

greater

than

500

feet

are

involved, the

maximum

number

of remote

stations,

depends

on

four

factors;

the

current

requirements

of

each remote

station,

the length

of

the

wire,

the wire gauge,

and

the cable

capacitance.

In

all

instances,

2-conductor,

shielded

interconnecting

cable

should

be

used.

A.

PORTABLE

INSTALLATIONS:

rubber-insulated

and

jacketed

cable should

be

used

due

to

its

superior

strength

and

durability.

Belden

8413

mini-

ature

cable

(24

gao

stranded conductors)

is

usable

up

to

500

feet.

Belden

8412

(20

gao

stranded conductors)

is

usable

up

to 5,000

feet.

B.

PERMANENT

INSTALLATIONS:

Vinyl-insulated

and

jacketed

cable

may

be

used;

it

costs

less

and

is

easier

to

pull through conduit than

rubber

insulated

types.

However,

low

capacitance

cable

must

be

used.

Belden

8762

(20

gao

stranded conductors)

is

usable

up

to

500

feet.

Belden

S'1rA

(18

gao

stranded conductors)

is

usable

up

to 5,000

feet.

NOTE:

In

systems where conduit

is

not used,

and

where equipment

may

not -share a

common

ground,

it

may

be

necessary

to

run

an

additional

ground wire

to

tie

chassis

together.

This

may

be

accomplished with

Belden

8770

3-conductor

shielded

cable.

C.

2-CHANNEL

PERMANENT

INSTALLATIONS:

Permanent systems can

be

wired in

one

of

two

ways.

First,

Channel A

and

Channel B may

be

routed to

two

distinct

areas,

for

use

by

different

people. Second,

both channels

may

be

routed

together

and

brought to

WP-2

wall

plates

so the user

can

select

either

channel A

or

B.

The

second

method

can

be

wired with

two

2-conductor

shielded

cables

or

one

multi-pair

shielded

cable.
Cables

equivalent

to

the

Belden types

may

be

used, so long as

their

capacitance

and

wire gauge

are

comparable.

Particularly

in longer runs,

it

is

desirable

to

use cable

which

has

low

resistance

(large

diameter conductors)

and

low

inter-conductor

capacitance.

- 5 -