USER MANUAL
I MODEL CM300 I
Console Mount User Station
I MODEL RM300 I
Rack Mount User Station
RTSTM
9350-2643-00Rev E 2/01
PROPRIETARY NOTICE
CUSTOMER SUPPORT
The RTS product information and design disclosed herein
were originated by and are the property of Telex
Technical questions should be directed to:
Communications, Inc. Telex reserves all patent,
proprietary design, manufacturing, reproduction, use and
sales rights thereto, and to any d c l e disclosed therein.
except to the extent rights are expressly granted to others.
COPYRIGHT NOTICE
Co yright 1994 by Telex Communications, Inc.. All
rigKts reserved. Reproduction in whole or in part without
prior written permission from Telex is prohibited.
PATENT NOTICE
This equipment contains and uses a desi embodied in
United States Patent No. 4,358,644: "A Elatera1 Current
Sowce for a Multi-terminal Intercom". Ibis design
employs a two-wire to four-wire convemr.
UNPACKING AND INSPECTION
Immediately upon recei of the equipment, inspect the
shipping contamer and e contents carefully for an
discrepancies or damage. Should there be anv. noti& the
freighi company and t6e dealer at once.
g
WARRANTY INFORMATION
RTS products are warranted by Telex Communications.
Inc. to be free from defects in materials and workmanship
for a period of three years from the date of sale.
The sole oblieatim of Telex durine the w a m w oeriod is
to provide, whout charge, pans &d labor necekky to
remedy covered defects appearing in products returned
pre aid to Telex. This waifanty does not wver any defect,
mahnctim or failure caused bevond
,~~~-the conhol of
..Telex.
.... .,
including unreasonable M negligent operation, abuse,
accident, failure to follow insmctions in the Service
Manual or tbe User Manual. defective or imomner
associated equi ment, a t t e e at modificadon'and repair
not authorized gy Telex,
shlp mg damage. Products
with chei serial numbers remov!e or effaced are not
covered by this warranty.
To obtain warranty service, follow the procedures entitled
"Procedure For Renuns" and "Shipping to Manufacturer
for Repair or Adjusrment".
This warranty is the sole and exclusive ex rcss warranty
given with respect to RTS d u c t s . It is l! e resbonsibilitv
of the user to determine before purchase that [hi's p r o d ~ ~ i
is suitable for the user's intended purpose.
WARRANTY.
NEITHER TELEX NOR THE DEALER WHO S U S
RTS PRODUCTS IS LIABLE FOR INCIDENTAL OR
CONSEQUENTIAL DAMAGES OF ANY KIND.
Customer Service Department
RTSfl'elex
12000 Portland Avenue South
Bumsville, MN 55337 U.S.A.
Telephone: (952) 884-4051
Fax: (800) 323-0498
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
A&ORIZATION from:
Customer Service Depamnent
Telex Communications, Inc.
Telephone: (877) 863-41 69
Fax: (800) 323-0498
DO NOT RETURN ANY EQUIPMENT DIRECTLY
TO THE FACTORY WITHOUT FlRST
OBTAINING A RETURN AUTHORIZATION.
Be oreoared to mvide the comoanv name. address.
phdne 'number,i person to conkct kgarding the re 'air,
the type and qgntity of equipment, a description ofthe
pmb em and
send number(s).
SHIPPING TO MANUFACTURER FOR REPAIR OR
ADJUSTMENT
All shi~mentsof RTS d u c t s should be made via
unitedparcel Service br the best available shipper.
prepaid. The equipment should be shipped in the original
Dackine carton: ifthat is not available: -use anv suitable
container that 1s rigid and of adequatesize. If-a substitute
container is used, the equipment should be wra
paper and surrounded with at least four inches o
in
ixielsior or similar shock-ahsorbine material. All
shi ments must be sent to the follo&ng addrcss and must
incrude the Return Authorization.
pped
Factory Service Department
Telex Communicabons, Incorporated
West 1st Street
Blue Earth, MN 56013 U.S.A.
Upon completion of any repair the equipment will be
returned vla United Parcel Service or specified shipper
collect.
Figure 1-2
CM3001RMUW)Block Disgram
On
the Model CM300/Rhi3w,
a latching switch or
1.1 DESCRIPTION
momentary push button tums the microphone on.
The Model CM3W is a console mount, t w h l
intercom user station. The Model RMUX) is a rack mnmt,
two-chmd intmom user station. The user station is
designed to he used in a full duplex, wafermce line
intercom system.
The mommtary push hutton allows quick bursts of
Confereuce Line IntMcom Svstem (Figure 1-1)
communication, especially useful in a high noise mvironmmt. Ihe latched position allows 'hpnds fne' op
d o n , when the llscr aeuls to have two way conversation
while paformiDg a n o k activity.
The Channel Select Switch
A chmnel sdector switch allows a choice of two
(optionally three) ch.nnels. Whm the switch is on the 'I'
positionthestationtalksandlistensonchnollcl1,onthe
c ~ , a l l u s e r s a n l i s t r n w h e ~ a n r e o r m m o t b s r "2' position, channel 2, and m on. On larger systems the
users are talking (eonf&g).
Up to 75 usns csn
'1' position may be any system channel (1 through 12 for
share the same d e r m c 8 line (or confcrma bus).
example). Similarly, for position "2'. See Section 2.1 for
DC powering rsqoinmeats under these conditions.
A confline intercom sysIem allows a group of
people to talk and listrn on a single chaaael. On this
Call Li& Push Buttog (CM3WL/RM3WL, only)
Full duplex @on
allows two way conversation at
Pushing this button transmits a mll signal to all other units
t h e ~ t i m e , t h a t i s , o n e u s e r ~ ~ t a s s o n on
d the chmnel selected by the c b l selector switch. A
all signal on this &amel will cause the all light push
buttontotlash. ~ & p s h r a t e i s 2 t o 5 t i m D s a p e c o m d .
The all signal itaclf is a 20 kilohertz signal.
The CM3W/RM3W, with a hedset, intcrhces a hurmn
usertotheinintaoomsystem. Tbeusertdksandlirtms
using the head& (or a hmdsst). The headset umnects to
The CM3MYRMUK) .ad CM3WLRM3WL use the CC33 card
umnector ( o p t b d l y five or six pin). The CM3W/RM3W ere# u idhated bclow. Codcl at the cad of each pngnph
uneeds to the systsm using a t h e conductor iadiatc thc cud d. Codcl ue: *CC33 u r d , **CW card.
cud. (CC33 sehemtic i SD1464, CCWCC45
"mitype cable. me CM3w/RM3w wataiU6 MCC(5
.ohcrmtic is SD1427).
four ~011tmIs:the volum anmoll, the latching microphone
switch, the momntary microphone switch, md the chanael -DL: Dual Littcn on two channclr. The volume wntml is
select switch. On the Model CM3W/RM300L, the ~ t o a d u a l ~ t r i c p o t c n t i o m c t a w i t h t w o k n o h sThe
.
momentary microphone switch is replaced with the all 0h.nnclrelcctmachmutatheWLugunl. Thcouuidekmb
f o l h thc duancl selector. The Mi knob i the non-talk,
tight button.
listm only 0b.naCl.
Volume Control
-E: Rognm I n p ,
D c h line loop(hrough, the
hkncedpmgrunufedmmatud. Pinr2Md3uethcinput
The volum wntrol on the CM3WlRM3W has a wide
wnncUionr. A dual W&
ptentiomcta with two knobs
pmvidu rcp.ntc level controls for intercom md pmgnm.
range to canpensote for: user he&$ differences, ambient noise variation, variations in headse4 I haadset d-3CII: T h e C i i m d opmtion. Line and LoopUvough
tivity. and variations in voice. The volume watrol in
connecton ue changed to 4-pin fmm 3-pin. A 3-position
the CM3W/RM3W mhtcea distortion by driving the
dunnd s e k a mach rcpkes ihc 2-position witch.
headphone amplifier oaly as much as needed.
-USMB: UnSwitched Micmphonc output, Balanced. Deldeo
linc boplhrough. L e d -7dBm to +3dBm. . Thc USMB
pmvidu Ilinc level microphone signal to other systems such u
lntenupted Feuihack System (IFB), telephone, radiotelephone.
In n o d system opention, one a nrole users talk and the m
or Stage Announa.
othm listen. A microphone switch on each station allows
the talker's microphone to he mabled and allows the -LP: Loul Paver munu. A small moduk wnvem AC line
listmas to keep their microphones disabled. In this power to low voltage to power the urer station. a .cparatc
condition, speech intelligibility is euhanced since connector is provided. The unit docs not use power Cmm the
intercom line.
backgmund noise from other microphones is not present.
w.
Page 5
13 CM3oO/RM3Ml SPJXWICATIONS
JI..hbwArdUir
Input DC Voltage
Voltage ruin
ovlplt voltage
34dB
8 ~ ~puli-wprt
l u
into 25 n
q t -
lnwutpuliiatouobm
FrrqmcyRapomt
lSObemto8kiloktzr3dB
NUI'EI DO NOT USE BEADPEONES
THANISOHrds.
SidUms
-
IMPEDANCESLESS
-2OdBtoIullo.
AdjmttncntRrqy
(YCIIILL
SpdiDgFrcqwyr
ZO,WObem*1whcRE
-u
5haas2bem
B..*.tCrue(u
MMiaophm
XLRtypcCpi~tuM!C
CuboDMicmpbmc
llCIPsdudpboacj.cl53drevit
u.rca8sdam
InPt
M
XLRtypc3pinfcmk
XLR typc
~
male
~
Ndrc..ML.r*.
One unit
Tm lmin
-
M a n eh a m l l l i k
w"tIm-
Im-
Muimuminput Lnnl
Fymiii
LimitsrRrqy
PirkL
Mdn
--
FiontRncl:
t G EolwlPah~Fcdcnl
Studud 5 9 5 L T 2 6 4 9 2
CLPb Gdd Iriditcmcr Aluminum
--
sPixmcAnON NOTES
CmTmtSoua
TransferRatio
o~
B U
0 dB,
Qcuit)
Page 6
0.775 WIU
1 m1mt
0.775 vdu rnrr into600 ohm 1 4 (0 dB%open
L
NW: Opemdion of a aydm or maximum load dOCS not
allow for other miations such as fempermun, line
*e,
able ,-er
and s u w . A nwrt pnrdcni
o p p m o a h & & o p c ~ ~ s y ~ ~ n o n o n f l r n n o8f 0 %
2.1 Power Rquhm&, Type Of System, PowMethod And Power Supply(i)
-Pad*.
Power Ranuremnts
To maintain a bridging 10,000 ohm0 bpedanw to the
intenmu line, the CM300/RM300 requires +18 to +35
volts DC. To opemte in I d power or t a t h y modes, the
CM300/RM300 rsguires from 15 to +35 volts DC,but
ic opesable at reduced performauce from +12 to +17.9
volts.
+
In (3) above, a l d power supply provides 12 to 24 volts
DC at 120 mill*mpms peak for esch station, or, for
nmote single station operation, two 9-volt batteries in
mliesrmy be&.
In (1) & (3) above, the two Wireb curyiug audio require
one system tamhation wnsisting of a UX) ohm mistor
mula 100 mimfarad capacitor in series. This combination
i s ~ r r o s s t h e t w o w i r c s . Coanectpolorized
@tors
negative to system circuit common.
~CMHKllRM300cmbe~edina(l)three~
system, (2) two wirs system, or (3) speciPl*
win To W l tbe 0%300IRM300:
sy-1. ~ t h e t y p e o f s y s t e m i n w h i c h t b e
PWCMR M@@
CM300/RM300 is to be htalled. Detemine the powPowerismrri~tothe\mitfromasystem~supply
*~dpo~ersllppl~(i~).
using three diffcrrnt methods:
2. Dstamine the mwnting of the C!M300/RM300.
(1) In a 3 - 6 system ('Series 17" type), the power is
Stpuatefromtheaudiodsuppliedcmtnlly.
3. Read 'Choosing Hadsets or Ehds&s'.
4. Dcraminc the cabling m p k m a t a .
5. Create a system block diagram & equipment Si (if not
W y available), them iustalI the systua
(3) I n a ~ t w o w i r s S y s t e m ( L o u l P o w o ) , e s c h
c M 3 0 0 ~ 3 0 0is l d y pawerrd md opmtes on
switch ChnneJ two.
Ths cM300/RM300s are 6. Verify wmct rystem opention by using the checkout
inusing two win able. P o r n is
procedure in this dvpter (2.6).
suppliedbyabatteryoraloulpowgsupply. The
local p o w supply should be isolated from eutb
7. Update the systeal block diagm, squipment list and
ground.
my 0 t h on
to reflect the 'as hitdled'
In (1) above, the power supply is a regulated supply, 24
dguration. If the system block diagram was
volts DC to 32 volts DC, 1.5 .mperes. This supply cm
origi~Uyd by RTS Systems, swxi a copy of the
o p u w up to 50 CM300/RM300 and 30
'as instrlled' system block diagnm to RTS Systems.
CM300LIRM300L user strtiws.
This diagram will be ussd to update the original
docummtoton. d for fuhueservice ~ p p t .
For case (2) above, rsgtming cutmats shown, the supplies
versus rmximum rmmber of Etatiom pmvered are:
power S m l y
!xx!!2
phl300 (37mA)
Model PS8 (0.43A)
Model PSI5 (1.OA)
Model PS31(1.5A)
11
27
41
!xaL
RM300L (60n1,Q
?hs a 3 0 0 mom& in a console, use the installation
diagram at the back of this maoual for cutout d i i i w s
md d i n g hole I d - .
The RM300 mounts in an
EIA 19 inch rack.
Page 7
23 millipmpms for tbe CM300/RM300, 33 millirmperes
for tbe CM300URM300L).
The ability of hadphones to shut out mwmted envi=ts
Euviroampf Table 2-1 shows typical opentino
o f o f
mi= p d .
and tbs
A very quid openting mvhmnmt, such as a television
studio, may require that Damd does not leak from the
headphones, meanbig the badphoaes should have good
'acoustic isolation'.
A very noisy or Loud mvironmat usually requirts
headphones tbat prevent outside muud from ledring in
(again, gwd rcwatic isolation), h e a d p h that can
pmQes a loud, dor d,
lad noist ancelliag micmph-,
as well.
~talaoigvaiesfromnons(odBisolation)to.bout
1/8th as ioud (30 dB isolation). The degree of isolation
depads both on the design of the bssdset sad the
h p a c y colltmt of the m h t a l noise.
Lightweight, 'opm' hesdsetg such as the RTS System
Lt1267 (single muff) md LEI268 (double muff), have
plmwt no (0 dB) isolation. The trade-off is that the
LH267/LH268 am very comfortable and can be worn for
long Mods (8 to 12 hours) without physical d i d &
fromtheeandfsorlwndbd. TheLH267/LH268are
lowilqdmceandcanbetlnneduploud.
U ~ g ~ i n a n o i s y m v i m a m a n t ~ ~
theaormd!iumtheheadphoapisasloudorlouderthmtbe
sound l d i n g into the headphmes from the noisy
en-
The DT108lDT109 headmt6 have m isolation m g b g from
1odEtomdB.
At last four companies, Telex, Sstcom, David Clark, and
Cuter Eagbmhg adl kadscts intended for heavy
iduskid, .aosl#rc, md militmy mark&.. Thcsc hdsets
ern p V i & d
c isohtion figma of 2odB to 40dB.
G d y slmking, t l w o kadscts us heavier and Less
L a v ~ o e ~ u e l o r d e r , & g mmfortablo to wcu.
theluorstltiontodnwmncwrrntfromthepower
supply. High hqdmce hadplmss am not as l a d ,
dmuing lcss tfrom tbs paves apply. The user
stationdssignmgsof~fortheberdphoasprt
of the hadsat is 25 ohms to 600 ohms. Head-
~~geaonl,~-~f~hs;ldphoaedcpcads
upon its ability to h o & powar at a givm voltage
(impdame) and the efficiency of its design. Practically.
theimpdwxhasalargerefhxtwith~tdaybeulstts.
Ingsnml,tbsoomfortofberdsetsdepmdsuprm
levels. InadoublemuffhadsetruchastheBcyerDT109 their weight, padding and dssign.
sold by RTS Systems, them u e 50 ohm h a d p h e s eoanected in parallel d t i n g in m impedaaca of 25 ohms.
In the head& cpnaeetinO able, ptsvent coupling be-weu~
the microphone and headphone leads by using at I& a
Efficiencv The user station pmd- the loud& sound in shielded wire for the micmphone, aad a seporrte pair of
low impdwx headplmw svch as the DT109. In this wires for the hcdpkm@). &ttor isolation may be
headphone, ons milliwatt of dcchical power produce 94 possible with a twisted, shielded pir for the micmpbne
leads. Do not allow hadphone ground to mutact
dB SPL (soundFlwsIUa Level).
micmphw ground or shield. Tie the shield to microphone
PracticalLoudllw TheuserSt.tionuuproduce.aSPLof ground or miuopboae low. Do not tie the shield to the
111 dB in each or of a DT109 or DTlO8 headset. LMV case of the Mnncetor or the case of the user station. In
impdance htPdstts such as the DTlO8 and DT109 gcaeral the maximum lmgth for the headset cable is ten feet
heodsets,uusstheuserstationto~morrpaw~from(3.1 meters). Lar@ over ten feet require a special
the power supply. With DT109 hdsets, CM300mM300 exteasion able. Check with RTS Systems for help with
peak cumnt is 75 milli.mpWe. The CM300URM300L longer cables.
mak currsnt is ismillhoeres.
With 600 ohm
bdpbcmes, peak eumnt d 30milli.mpnss for the
CM3001RM300 user sation. 40 m i l l i ~ ~forb the
CM~OOURM~WL
user mion. (quissc2at c u m t is
~MX)toUXX)ohrmwillopnteatIsduwd
Page 8
Anotha bmsfit of not "earth" grounding the circuit return
is tht it prevents the h t m h t i o n of noise through 'earth"
curw(s from other equipmeat. If the RTS Systmes circuit
gmund~tsthsc~l~nts,itisWrdythattheywillbc
hevd is interfering noise on the d 4 o n line.
Wirsri?rcddsrrninssthe~opwrtingdist.nCc
(where the DC voltage drop is the limiting factor). Ths
following eqlutioas apply for a wndnctor size of #22
AWG. a minimwnuser station voltage of 18.0 volts, d a
minimum power supply voltage as stated below.
For Modds PSlO, PSM, PS31, P M , PS60, usa Vmin =
28.4 VDC:
D
D h -
..
322,181 1Ibt -(
1.
(mtgs)= 99,133 1Im (milliPmperes)
(feet)
P
For Models PS8, PSl5 (Vmin = 24.0 MC):
Wirin~lC&&g(See Cable Wiring
Application Momati011)
..
(feet) = 185,874 1 Im (rmllumpcrcs1
Dhce-
Exnmpk:
(map) = 56,654 1 I&# (milli.mpsrss)
..
i in Section 7,
Two c h m d 'TW' applications, or single c l l m l d , thma
Ths CM300URM300L with 25 ohm
.
With a PS8 supply
the maximum c p a h g ~ f o this
r
anti011 is
185,874160 ' '
= 3098 fkt (944 mstas). Asd
with a PS3-ly
the muimom opsnting dishlLce
= 5370 feet (1652 mtgs).
~ u s a r u p t o 6 0
D
wiro a p p l i ~ & ~IMY
~ USE ather e~ ~ C ~ O ~ I I O cable
DC
(for canrmimcs) or hmhvkhl-pair cable (Isss expensive
tbrmmicqhomcnble). S I a n d a d w i r c r i z c f o r t h e ~
is#2zgougswiroforinkm=&h.
F o r y t
iumWi01u arch chtlmd should have m i~~J~wdually
(37mA) is
shieldedtwistalpirof.tlasr#2zgurgewirc;wrchis
8723 for 2 ~ b m n d UUCI
~ , mn for 3 cbmnels. POX
plenum md I or 2CV' C wiring, use Bddea 88723 md
88777. Ths plaaum able hna a slighUy smaller d*metcr,
isTefbninsul.tsd, d.boutthree. timgthepriceof 8723
18777.
System circuit g r d should not b k t l y c o n d to
WireusingcableWi~,Section7,toreduce
md a usa station with 25 ohm
185,874EV = 5024 feet (1531 -).
phollg
intdemim UUCI help maintain a low crossc.1L f i p
'euth'or'chssis'zmund(dirseclvmesnsacamectionm
b
ohmmtawwld&).
~ g C T 8 1 . l i o n i s b ~ t ostmea*.
its own chassis via a 0.1 microfaad capacitor, stabli6biug
a r P d i o f i . q l l c I I c y ( R F ) ~ t o r a d u e s n d i o ~ The audio a& Liac levd is bchmwa 1OdBu md OdBu
(bchvecn 0.24 .ad 0.77 volts rms). Thwe levels are low
in~cefmmndiotnnsmi~.
~ t o ~ t ~ i n t o & e q u i p m m t ( s u e b a s
To pre-vent a buildup of voltage acm(g tbe system ca- TV amsns) yet high amugh to minimirs extend
p l c i ~ , t h c p o w s r s u p p I y h s a b l s s d s r ~ t o c h . s s i s inmfemcetotheTWSpttm.
ground (22 kilohms). If the system hs no RTS Systems
pow- supply, add a bleeder mistor at a cmotnl point in The 200 ohm Liac i m p d a w is high enough to uUow
mnnmmication om liae lengths of 1.6 kilometers (one
the system.
mile) d low mwgh to permit m d#lrule speech
The benefit of not 'earth' gnnmdiug the RTS System bmdwidth with 3.2 kilomttefs of d a t e d cable. In
circuit nzum is that continued operation is possible during most systems the 200 ohm impcdpace gives a high fidelity
nn accidmtrl system ground fault.
This awidmtal bmndwidth with low lwsar.
grounding uo happm whea a wire is pinched or a cable
scraped.erossasbprpedge. Oncrceidentalgrwndcmb When using equipmeat in nia or conditions of excessive
t o l d by the system until the fault can be cleared md moisturr, always protect the equipment with plastic covers
me lifted out of mud,
(with luck) b c f m a sccolld ground fnult can cause noise or md make sure uU cable c~ll~ectcns
mow
or
moisture
md
pmtected
with
plastic. Wpter mud
overload or bring the system down.
dsnowin~~~~cpnca~s~noise.
Page 9
IntheIWIn~systemd~sluroscommm
ciraritgrcundrshnn.
due to common^
XLR431 m
k
~cmbeducedbyn6ing22pylcnhieldeduMe, I I I ~ ~ M :
-55 m u , n~mirul
and~elillgsbidddninwinswithcircuitrchunwirrs. Output Lvclto lll!d&onc:
10 volta pak-tc-pd.
Capacitive cmssWL cm be raducsd by using rwo rbidded
apm circuit.
jmir. O w w i r s o f o n c ~ ~ t o c b r n n e l o n a ( p i n 2 ) ,
a ~ ~ 0 f b 0 o t b t r ~ ~ t o E h . n n a ~ @ i n 3 ) Pin1-M*ropbwcbw
,
the nmrining wires are circuit retmn (pin 1). (See Cable
Pin 2 - Miempbwc high
Wiring Diagnm at back of mmd).
Pin 3 - Hadphonelow
~ ~ m s y ~ b e r h i e v a l i n m n t e ~Pin4-Hadphonehigh
using Moael CCD214 CrosatrlL ChceUion Dsviw.
~eCM300isdesignrdformmmtingina~1e(See
insWatio11 dab at back of &is rmmul. Ths RM300 is
deeigned for nck mounting in m RIA 19 inch Rok.
Leave .?pace for control -,
abliog md savichg. such
~cab~g~wloops.rachingforXLRtypeeonacaor
locks. local power option power suppti~~~
md llmd&
connstorsmdabks.
If the hsodsct connstor is rrmoted, Q not w this cable
clwe to intafaing sourcss wch u, videom d t o r s .
power supplies md eqDipmat with iater~I powa
supplies.
Cuboo Micmphone Hadrct Colwctm. 114 in. phom jack (12):
Uaiag~usa~onswilhthree~mdthlm
Cuboo MLmpboac: Ti (-15 dBv iaplt, nomirul)
pgscrm, verify thDt dl pgsc*ls can in@
rte
Hcrdpbwc: Ring (10 V p k to peak open circuit)
~
~
t
h
e Vss r i fyy t h .~1 W i t I l 1 I 1 m i ~ Common. S h
s w i t c h off md volume mmIs midway, only a b d y
audiblehissisbsrrd. T b e o t h c r t w o p c n r m s ~ d s a m d
qudly louddcleutothsthirdpason.
XLR-3-31 mqlack (for ringlrdumcl)
-
Pie 1 Common (low side of linc)
Pin2-Poarrr
Pins-Chnncl
XLR-3-31 mcqtack (for
~~linc)
Pinl-Chanell
Pin2-Chl2
Pin3-Channel3
Pin 4 Common
-
Page 10
Table 2-1
Table 2-2
T y p i d Openting Envircammts,
Embmmtal Noise,Sormd PIcssureLsvel,
a
t
1
0
~
~
T y p i d Opeding Environments,
~PrcssureLevel,
at=
sQw2
Seb,
Aimaft
120dBto160dB
Orchestra, 75 p i e , (Perlis) or
Pipe org.n,(PerLs)
Rock Concat
140 dB
11OdBto140dB
Pirno,Parks
120 dB
Blaring Rdio
110 dB
Cmtrifugd Vmtilrting F m
110 dB
Auto on Highway
100 dB
m
s@x!zi
Muimum AUomb1.3
-=EX?
140 dB
+
LII267 cM3oo/RM300,
10 dB below Clipping
114 dB
DT109 + CM300/RM300,
10 dB Mow Clipping
111dB
+
LH268 CM300/RM300,
10 dB bdow Clippiag
SetCOmSeria5+CM300/RM300,
10dBbdowClipping
VdVmtilntingFm
90dB
Heoaphonsswith 20 dB Acoustic
Voiffi, Sbwting
90dB
ImLtioaat130dBRackConoert
(MdCI-4
Fwtory
75 dB
Voics,
70 dB
H~wilh40dBAcoustic
~lBticmat140dBRoekConcert
Rcsih
45 dB
Televisicm Studio
Voice, Wbisper
110 dB
( M da
25 dB to 35 dB
30 dB
Page 11
m
99 dB
11OdB
100dB
Figure3
Fmnt Panel, Model CMU)O/RM300 User Station
Page 12
SECTION 3: OPERATION
3.1 Operating Controls And Conaectors
The r e f m c e numbcrs in below comspond to the circled numbers in Figure 3.
Ref No. Name
1)
CHannel & k t Switch 1 2 Selects 1of 2 cham& (staadard) or 1of 3 chPnncls ( o p t i d ) . The optional Call
Light operates on the channel selected by this switch. Tbe CHmuel select switch is
omitted in the Single Chnnrd (SC) option.
2)
MIC ON-OFF toggle
1)
MIC ON-off plsh button A m~mmtnry-saionmicrophoae d l e switch on the Model CM300/RM300
4)
VOLUME
A headphone VOLUME control. (May be a dud conhol for the Dual Listen (DL)
or Pmgnm 0option).
5)
CALLplshbotton
( O p t i d ) The CALL push buaoa m Model CM300L/RMU)(1L@Jo momeatuy
mic).
6)
DYNnmic M I C r o p b
HeaDSeT Colmsctor.
A dynamic miaophm typshead& plugs in hm.
7)
CARBonMICrophooc
A c a k m microphone typs head& plugs in hae. The headset may also HeaDSeT
beacubonmi~smul.tstypebspdpet.
A latchingrction switch.
(Stsndsrd - -without the Call Light option).
Coaaeaor
(onRear P
d )
INPUT
Plug in the he Liw hemhen. Colmcrs tbe h e l e mount usg station to the
TW intarom system.
--
A cwveni(0cb cemector aIlows another comoLs momt user station to be
coaneacdtotheTWintacomsystem.
CAUTION!
Always turn the voltme mnbol dl the way ewnterdochvise (to the left) before plugging in the headset
3.2 Operation (Afterconnscting station to the intercom line md plugging in hesdsst).
To ~ ~ m m u n i c pdc ci d y with ; m o k station or d m s :
1)
T m the VOLUME contmi dl the way ~ountcrc1ockwise(to the left) before plugging in the herdset.
2)
Select the chmel usjng Ihe b e 1 select switch.
3)
Set the listening level in the headset using the VOLUME contml.
4)
To talk, set the MIC ONIOFF toggle switch to the 'ON' position (or push the MIC push button) and speak into the
minophone. Return the switch to the OFF position to eliminate m e c e s s ~ r noise
y
on the intercom line.
Page 13
Sectim 7: DIAGRIMS I DRAWINGS
Dacumcnt
Nunbet
m
These dnnvingaapplies 0 CM300 Unifs with CC33 or CC40 wnlr.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -15
Installation hawing. CM300. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
OD2993
A Outline hawin& CMU)O.
ID2993
A
These dnawings applicp & CM300lRM300 Units with CC33 orCC40 d.
-
A Cable Wiring Diagrams,2Chwncl SystemM!ha~elSystem
TM1786
B 12-volt Battcry Opedon/ Tckpmdoctim Systean Exampk
. . . . . . . . . . . . . . 17
M u l t i c ~ O p e m t h I D ~ ~ L Opeaarim(?brextendeddistmas).
ine
. . . . . . . . .19
Model CM3WIRM3W User SOatOna with 1333 Eonl (Slrudrml uni& and vnib with CdJ Light Option).
. . . . . . . . . .20
AssemblyDhgmm,P.C.B.,CC33. . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
SD1464
B Schanatic Diagram, Scrim B Phase 3 User Statim . . . . . . . . . .
AS1821
B
Model CM3WIRM3W User SPllions with CC40 cud( U& w&h wiow oprions or eombindonx of oprions9 Also
applies to sPMdord unifs k i l l khveen 1979and198l, appr0xhakly.J
. . . . . . . . .22
Assembly Diagram, P.C.B. CCW45 Layout. . . . . . . . . . . . . . . . . . . . . . .23
SD1427-01
B (Simplified)Schematic Diagram,Phase Dl User Stations ( 0 2 4 ) sheet 1
AS1409
B
CC40 anti detailed d i a g m
. . . . . . . . . . . . . . 24
Schemluic D i . P h a s e 3 Usa Stations, sheet 2 of 2 . . . . . . . . . . . . . . . . . 25
SD1427-00
B Schematic Digram, Phase 3 User Stations, sheet 1 of 2
SD1427M)
B
Cali L' ht Option used by both Modal CM300IRM300 User S & ~ Mwith CC33 ccvd(Standard units and units with Call
~ i g h t plion).
8
SD1470
.
B Servicing Diagram, Light Signaling Circuit,02-18SL. Phase 3 C o n f i g ~ o n. . . . . 26
Page 14
0D2993, Outline Drawing, CM3OO
Page 15
Page 16
Channel 2
3
n
3
Common
I
Channel 1
2
Common
2
I
Drain Wins
1
To Supply
N.C.
,L-1I,
-
1
To Station --,
n Gm
3
-
Channel 3
Elk
Red
3
, , N.C.
Channel 2
c To Supply
Cable Wiring D
n
2
To Station
i ,T h Channel Systen
Page 17
-
Page 18
Page 21
-ma
-u (I,
-
..
<-a)
DEmIII~nuUc-CIllm-
1
R?=-
mraarrsra
i m n -
:-
.
:
I
-.