Telex CM300, RM300 User Manual

USER

I

MODEL CM300

Console Mount User Station

MANUAL

I

I

MODEL RM300

Rack Mount User Station

I

RTSTM

9350-2643-00

Rev

E

2/01

PROPRIETARY NOTICE

The

RTS product information and design disclosed herein

were

originated

by and

are

the property of Telex
Communications, Inc. Telex reserves all patent,
proprietary design, manufacturing, reproduction, use and
sales rights thereto, and to any
except to the extent rights

dcle disclosed therein.

are

expressly

granted

to others.

COPYRIGHT NOTICE

CUSTOMER SUPPORT

Technical questions should

Customer Service Department
RTSfl'elex

12000

Portland Avenue South
Bumsville,
Telephone:
Fax:

[phone]

be

directed

MN

55337

[phone]

to:

U.S.A.

Co yright
rigKts reserved. Reproduction in whole or

1994

by Telex Communications, Inc.. All

in

part without

prior written permission from Telex is prohibited.

PATENT NOTICE

This

equipment contains and uses a desi

United States Patent No.

4,358,644:

Sowce for a Multi-terminal Intercom".
employs a two-wire to four-wire

convemr.

embodied in

"A

Elatera1 Current

Ibis

design

UNPACKING AND INSPECTION

Immediately upon recei of the equipment, inspect the
shipping

discrepancies or damage. Should there be

freighi company and t6e dealer at once.

contamer and g e contents carefully for an

anv. noti& the

WARRANTY INFORMATION

RTS products are warranted by Telex Communications.
Inc. to be
for a period of

The sole

to provide,
remedy covered defects appearing in
pre aid
mahnctim or failure

including unreasonable M negligent operation, abuse,
accident, failure to follow
Manual or
associated equi ment, attee at modificadon'and repair

not authorized

with

covered

free

from defects in materials and workmanship

three

years from the

date

of sale.

oblieatim of Telex durine the wamw oeriod is

whout charge,

to

Telex. This waifanty

pans

caused

&d labor necekky to

products

does

not wver any defect,

bevond the

,

~~~-

returned

conhol

insmctions in the Service

tbe

User Manual. defective or imomner

chei

gy Telex,

serial numbers remov

by

this warranty.

shlp mg damage.

e!

or effaced

Products

are

of

Telex.

..

....

not

RETURN SHIPPING INSTRUCTIONS

PROCEDURE FOR RETURNS
If a repair is necessary, contact the dealer where this unit

was purchased.

If

rc

air throu h the dealer is not possible, obtain a

R&N

DO

TO
OBTAINING A

Be
phdne 'number,i person to conkct kgarding the re 'air,
the
pmb em and send number(s).

SHIPPING TO MANUFACTURER FOR REPAIR OR
ADJUSTMENT

All
unitedparcel Service br the best available shipper.

.,

prepaid. The equipment should be shipped in
Dackine carton:
container that 1s rigid
container is used, the equipment should
paper and surrounded with at least four inches o
ixielsior or similar shock-ahsorbine
shi

incrude the Return Authorization.

A&ORIZATION

Customer Service

from:

Depamnent
Telex Communications, Inc.
Telephone:
Fax:

NOT

RETURN ANY

THE

FACTORY WITHOUT

oreoared

to

(877) 863-41 69

[phone]

EQUIPMENT

DIRECTLY

FlRST

RETURN

mvide the comoanv name. address.

AUTHORIZATION.

type and qgntity of equipment, a description ofthe

shi~ments of RTS ducts should

ifthat

is not available: -use anv suitable

and

of adequatesize. If-a substitute

be

made via

be

wra

material.

the

original

pped

All

in

ments must be sent to the follo&ng addrcss and must

To obtain warranty service, follow the
"Procedure For

for Repair or

Renuns" and "Shipping to Manufacturer

Adjusrment".

procedures entitled

This warranty is the sole and exclusive ex rcss warranty

respect

to

given with

of

the user to determine before purchase

RTS ducts. It is

l!

e resbonsibilitv

that

[hi's prod~~i

is suitable for the user's intended purpose.

WARRANTY.

NEITHER TELEX NOR

THE

DEALER

WHO SUS

RTS PRODUCTS IS LIABLE FOR INCIDENTAL OR

ANY

CONSEQUENTIAL DAMAGES OF

KIND.

Factory Service Department
Telex

Communicabons, Incorporated

West 1st Street

Earth,

MN

56013

Blue

Upon completion of any repair the equipment will

U.S.A.

be

returned vla United Parcel Service or specified shipper

collect.

Figure

CM3001RMUW)

1-2

Block

Disgram

1.1

DESCRIPTION

The Model CM3W
intercom
two-chmd

designed

intercom

Confereuce

A

people to

conf-

user

station.

intmom

to

he

system.

Line

talk

used

IntMcom

line

intercom

and

listrn

is

a console mount, twhl

The

Model

user

station. The

in a

full

Svstem (Figure

on

a single chaaael.

RMUX)

duplex, wafermce

sysIem

is

a

user

1-1)

allows a

rack

station

group

On

mnmt,

line

of

this

is

c~,allusersanlistrnwhe~anreormmotbsr

users

are

share

Full

talking (eonf&g). Up to 75

the

same

duplex

dermc8

@on

line

allows

(or

two

confcrma

way conversation

usns

bus).

csn

at

the~time,thatis,oneuser~~tassond

The

CM3W/RM3W, with

usertotheinintaoomsystem.

using

the

head& (or a

umnector (optbdly five or

uneeds

"mi­four
switch,
select switch.

momentary

tight

to

~011tmIs:

the

momntary

microphone switch

button.

the

type

cable.

the

volum anmoll,

On

a

hedset,

Tbeusertdksandlirtms

hmdsst).

systsm

microphone switch,

the

The

six

pin).

The

using

me

a

CM3w/RM3w

the

latching

Model CM3W/RM300L,

is

replaced

intcrhces

headset

a

umnects

CM3W/RM3W

the

conductor

microphone

md

the

with

hurmn

to

wataiU6

chanael

the

the all

Volume Control
The

volum wntrol on the CM3WlRM3W
range to
ent noise variation, variations in

tivity.
the
headphone amplifier

In

othm
the talker's microphone to
listmas to
condition,

backgmund

canpensote

and

variations in voice. The volume watrol in

CM3W/RM3W

for:

mhtcea

oaly

as

user

distortion by driving the

much

nod system opention, one

listen.

A

microphone switch on each station allows

he

keep

their microphones disabled.

speech

intelligibility is

noise from other microphones is not present.

he&$

headse4 I haadset

a

as

needed.

nrole

mabled

has

differences,

users

talk

and

euhanced

a wide

ambi-

d-

and the

allows

In

the

this

since

On

the

Model

momentary

The

mommtary

communication, especially

ronmmt.

don,
while

when

paformiDg

The Channel

A

chmnel

(optionally

CM300/Rhi3w, a

push

button

push

Ihe

latched

the

llscr

aeuls

anok activity.

Select

Switch

sdector

three)

switch allows a choice of two

ch.nnels.

latching

tums

the microphone on.

hutton

position allows

allows

useful

in

a

quick

high

'hpnds

to have two way conversation

Whm

the

switch is

switch or

bursts

of

noise mvi-

fne'

op

on

the

'I'

positionthestationtalksandlistensonchnollcl1,onthe

"2'

position, channel

'1'

position may

example). Similarly, for position

DC

powering

Call

Li&

Pushing

on

the

all

signal

rsqoinmeats

Push

this

button

chmnel

on

buttontotlash.
The

all

signal

The

CM3MYRMUK)

ere#

u

iadiatc

MCC(5

.ohcrmtic

-DL:

~toadual~tricpotcntiomctawithtwoknohs.

0h.nnclrelcctmachmutatheWLugunl.

folh

listm

-E:

hkncedpmgrunufedmmatud.
wnncUionr.

pmvidu

-3CII:

connecton

dunnd

-USMB:

linc

pmvidu

m

or

-LP:

power
connector

idhated

thc

cud

cud.

is

SD1427).

Dual

Littcn

thc

duancl

only

0b.naCl.

Rognm

rcp.ntc

The

ue

seka

UnSwitched

boplhrough.

I

lntenupted

Stage

linc

Announa.

Loul

to

low

is

Inp,

A

mach

Feuihack

Paver

provided. The

2,

and

m

on.

On

larger

systems

be

any

system

Buttog

selected

this

itaclf

(CM3WL/RM3WL, only)

transmits

by

&amel

~&pshrateis2to5timDsapecomd.

is

a

20

.ad

CM3WLRM3WL

bclow.

d.

Codcl

(CC33

on

sehemtic

two

selector.

w.

channel

under

a

mll

the

cbl

will

kilohertz

Codcl

at

ue:

channclr.

The

Dch

(1

through

"2'.

See

Section

these conditions.

signal

to all other

cause

signal.

the

*CC33

i

selector

the

cad

urd,

SD1464,

use

of

all

each

the CC33

switch.

**CW

CCWCC45

The volume wntml

Mi

Thcouuidekmb

knob

i

the

line loop(hrough,

12

2.1

units

light

pngnph

non-talk,

Pinr2Md3uethcinput

dual

W&

level

controls

Ciimd opmtion. Line

changed

rcpkes

Micmphonc output,

Led

level microphone signal

System

munu.

voltage

to

ptentiomcta

for

to

4-pin

ihc

2-position

-7dBm

(IFB),

A

small

power the

unit

intercom

fmm 3-pin.

to

+3dBm.

to

other systems

telephone,

moduk

urer

docs

not

with

md

witch.

Balanced.

two

pmgnm.

and

LoopUvough

A

3-position

.

Thc

radiotelephone.

wnvem AC line

station.

use

a

.cparatc

power Cmm

knobs

Deldeo

USMB

such

the

for
for

A

push

card

card.

is

The

the

u

the

intercom line.

Page

5

13

CM3oO/RM3Ml

Input

DC

Voltage

SPJXWICATIONS

JI..hbw

ArdUir

Voltage

ruin

ovlplt

voltage

qt-

FrrqmcyRapomt

34dB

8

~~lu

puli-wprt

lnwutpuliiatouobm
lSObemto8kiloktzr3dB

into

25

n

Ndrc..ML.r*.

One

unit

Tm

lmin

Mane

hamlllik

w"tIm-

-

Im-

Muimuminput

Lnnl

NUI'EI

DO

NOT

SidUms

AdjmttncntRrqy

(YCIIILL

SpdiDgFrcqwyr

-u

USE

BEADPEONES

THANISOHrds.

ZO,WObem*1whcRE

IMPEDANCES

-2OdBtoIullo.

5haas2bem

LESS

-

B..*.tCrue(u

MMiaophm

CuboDMicmpbmc

u.rca8sdam

InPt

-

M~~L

XLRtypcCpi~tuM!C

llCIPsdudpboacj.cl53drevit

XLRtypc3pinfcmk
XLR

typc

male

Fymiii

LimitsrRrqy

CmTmtSoua

Transfer

Ratio

Mdn

PirkL

sPixmcAnON

o

~BU

0

dB,,,

Qcuit)

Page

6

-

0.775

-

1

WIU

m1mt

FiontRncl:

Studud

CLPb

NOTES

-

-

0.775

tG

595LT26492

Gdd

Iriditc

vdu

rnrr

EolwlPah~Fcdcnl

mcr

into600

Aluminum

ohm

14

(0 dB%

open

NW:

2.1

Power

Method

Power Ranuremnts
To

maintain

intenmu

volts
CM300/RM300

ic

opesable

volts.

And

DC.

Rquhm&,

Power

a bridging

line,

the

To

opemte

rsguires

at

reduced

Type

Supply(i)

10,000 ohm0

CM300/RM300

in

Id

power

from

+

15

performauce

Of

System,

bpedanw

requires

or

tathy

to

+35 volts

from +12

Pow-

+18

modes,

to

to

to

+35

DC,

+17.9

~CMHKllRM300cmbe~edina(l)three~

system,

(2)

two

wirs

system,

or

(3)

speciPl*

win

sy--

PWCMR

Powerismrri~tothe\mitfromasystem~supply
using

(1)

M@@

three

diffcrrnt

In a 3-6

Stpuatefromtheaudiodsuppliedcmtnlly.

methods:

system

('Series 17" type),

the

power

allow

*e,

oppmoah&&opc~~sy~~nononflrnn80%

-Pad*.

In

(3) above, a ld power supply

the

DC

at

nmote

the

mliesrmy

but

In

(1)

one

system

mula

is~rrossthetwowircs.

@tors

To

Wl

1.

~thetypeofsysteminwhichtbe

CM300/RM300
*~dpo~ersllppl~(i~).

2.

Dstamine

is

3.

Read

Opemdion

for

other

able

120

mill*mpms

single

be&.

&

(3)

above,

tamhation

100

mimfarad

negative

tbe

0%300IRM300:

'Choosing

of

miations

re-,

station

to

the

mwnting

a

aydm

and

peak

operation,

the

two

wnsisting

capacitor

system

is

to

be

Hadsets

or

maximum

such

as

fempermun,

suw.

for

Wireb

in

series.

circuit common.

htalled.

of

the

or

Ehds&s'.

A

provides

esch

two

9-volt batteries

curyiug

of

a

UX)

This

Coanectpolorized

Detemine

C!M300/RM300.

load

dOCS

nwrt

pnrdcni

12 to 24 volts

station,

or, for

audio

require

ohm

mistor

combination

the

pow-

not

line

of

in

(3)

Ina~twowirsSystem(LoulPowo),esch

cM300~300

switch

in- using

ChnneJ

is

ldy

two.

two

pawerrd

Ths

cM300/RM300s

win

able.

md

opmtes

suppliedbyabatteryoraloulpowgsupply.

local

pow

ground.

In

(1) above,

volts

DC

opuw

CM300LIRM300L

For
versus

power Smly

Model PS8 (0.43A) 11
Model
Model

to

up

case

(2) above,

rmximum

PSI5 (1.OA) 27
PS31(1.5A) 41

supply

the

power supply

32 volts

to 50 CM300/RM300

user

rmmber

should

DC,

1.5

strtiws.

rsgtming

of

Etatiom

be

is

.mperes.

cutmats

!xx!!2

phl300 (37mA)

isolated

a

regulated

This

shown,

pmvered

!xaL

RM300L

from

the

are:

(60n1,Q

Porn

eutb

supply,
supply

and

supplies

4.

5.

on

are

6.

is

The

7.

24

cm

30

?hs

diagram
md ding

EIA

Dcraminc

Create

Wy

Verify

procedure

Update

my
dguration.
origi~Uy

'as

This

docummtoton.

a300

19

the

cabling

a

system

block diagram & equipment

available),

wmct

0th

in

the

systeal

-on

rystem

this

dvpter

d

instrlled'

diagram

at

inch

system

will

d

mom&

the

back

of

hole Id-. The RM300 mounts

rack.

mpkmata.

them

iustalI

the

opention by

(2.6).

block

diagm,

to

reflect

If

the

system

by RTS Systems,

block

diagnm

be

ussd

to

for

fuhue

service

in a

console,

this

maoual

systua

using

the

squipment

the

'as

block

diagram

swxi

a

copy of

to RTS Systems.

update

the

~ppt.

use

the

for cutout

Si

(if not

checkout

list

and

hitdled'

was

the

original

installation

diiiws

in

an

Page

7

23

millipmpms

for

tbe

CM300URM300L).

The

ability

Euviroampf Table 2-1

=ts

A

very

studio,

headphones,

'acoustic isolation'.

A very

headphones

(again,

pmQes

cmph-,

U~g~inanoisymvimamant~~

quid

may

noisy

tbat

gwd

a

loud,

as

and

tbs

openting

require

meanbig

that

the

or

Loud

prevent

rcwatic

dor

well.

mvhmnmt,

outside

isolation),

d,

shows

typical

ofof

Damd

does

badphoaes

mvironmat usually

muud

lad

mi= pd.

such

as

not

leak

should

from

headph

noist

ancelliag

opentino

a

television

from

have

requirts

ledring

that

good

~talaoigvaiesfromnons(odBisolation)to.bout

1/8th

as

ioud

depads

hpacy colltmt

Lightweight,

the

Lt1267 (single

plmwt

LH267/LH268 am very comfortable

long

fromtheeandfsorlwndbd.

in

lowilqdmceandcanbetlnneduploud.

can

mi-

both

no (0 dB) isolation.

Mods

theaormd!iumtheheadphoapisasloudorlouderthmtbe

The

sound

en-

~~geaonl,~-~f~hs;ldphoaedcpcads

upon

(impdame)

lding

its

ability

and

into

to

the

the

headphmes

ho&

efficiency

powar

of

its

from

at

a

givm

design.

the

noisy

voltage

Practically.

theimpdwxhasalargerefhxtwith~tdaybeulstts.

Lav~oe~uelorder,&g

DT108lDT109

1odEtomdB.
At

last

four

Cuter

iduskid,

ern

Gdy
mmfortablo to

Eagbmhg

pVi&

theluorstltiontodnwmncwrrntfromthepower

supply.

dmuing lcss -t

hqdmce

hadplmss

from

tbs

paves

apply. The

am

not

as

lad,

user

High

stationdssignmgsof~fortheberdphoasprt

of

the

hadsat

~MX)toUXX)ohrmwillopnteatIsduwd

levels.

sold by

nected

InadoublemuffhadsetruchastheBcyerDT109

RTS

in

Efficiencv

low

impdwx

headphone,
dB SPL

(sound

PracticalLoudllw

111 dB

impdance

in

heodsets,uusstheuserstationto~morrpaw~from

the

power

peak

cumnt

mak

currsnt

bdpbcmes,

CM3001RM300

CM~OOURM~WL

is

25

ohms

Systems,

parallel

The

user

them

dting

station

in

headplmw

ons

milliwatt

FlwsIUa

of

Level).

TheuserSt.tionuuproduce.aSPLof

each

or

of

a

DT109

htPdstts

supply. With DT109

is

peak

such

75 milli.mpWe.

is

ismillhoeres.

eumnt

user

sation.

user

mion. (quissc2at cumt

to

600

ue 50

ohm

m

impedaaca

pmd-

svch

as

the

dcchical

or

DTlO8 headset.

as

the

DTlO8

hdsets,

The

d

30milli.mpnss

40

milli~~b

ohms.

the

power

Head-

hadphes

of

25

ohms.

loud&

DT109.

CM300URM300L

With

sound

In

produce

and

DT109

CM300mM300

600

for
for

eoa-

in

this

94

LMV

ohm

the
the

is

their

weight,

In

the

head&

the

microphone

shielded

wires

possible

wire

for

with

leads.

micmphw

ground

case

gcaeral

(3.1
exteasion able.
longer cables.

or

of

the

the

meters).

for

tbe

CM300/RM300, 33 millirmperes

of

hadphones

(30

dB

on

the

'opm'

muff)

(8

to

12

headmt6

companies, Telex,

.aosl#rc,

dc

slmking,

md

tlwo

wcu.

to

isolation).

design

of

the

hesdsetg

md

LEI268

hours)

adl

without physical

have

kadscts

militmy

isohtion

kadscts

shut

out

mwmted

The

degree

of

the

mhtal noise.

such

as

(double

The

trade-off

and

of

bssdset

the

RTS System

muff),

is

can

be

did&

TheLH267/LH268are

m

isolation

Sstcom,

intended

mark&..

figma

us

David

of

2odB

heavier

mgbg

Clark,

for

Thcsc

envi-

isolation

sad

the

have

that

the

worn

for

from

and

heavy

hdsets

to

40dB.

and

Less

Ingsnml,tbsoomfortofberdsetsdepmdsuprm

padding

the

Do

ground

miuopboae low.

Mnncetor

maximum

and

dssign.

cpnaeetinO

and

for

hcdpkm@).

a

twisted,

not

able, ptsvent coupling

headphone leads by using

the

micmphone,

shielded

allow

hadphone

or

shield. Tie

Do

or

the

case

lmgth

for

the

Lar@

Check

over

with

ten

RTS

aad

&ttor

pir

for

ground

the

shield

not

tie the shield

of

the

headset

feet

Systems

be-weu~

at

I&

a

seporrte

isolation may

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Page

9