Telex
R
Op er ating In struc tions
PROFESSIONAL
WIRE LESS
IN TER COM SYS TEM
TR-300, BTR-300
TA BLE OF CON TENTS
IN TRO DUC TION ........................................................... 1
GEN ERAL DE SCRIP TION .................................................. 1
BTR-300 BASE STATION TRANS CEIVER ..................................... 3
SPEC I FI CA TIONS ..................................................... 3
FEA TURES ........................................................... 4
CON TROLS AND CON NEC TIONS ........................................... 5
TR-300 BELT-PACK TRANS CEIVER .......................................... 9
SPEC I FI CA TIONS ..................................................... 9
FEA TURES .......................................................... 10
CON TROLS AND CON NEC TIONS .......................................... 10
EQUIP MENT SET-UP ...................................................... 13
BTR-300 SET-UP ......................................................... 13
AN TENNA IN FOR MA TION ................................................ 16
TR-300 SET-UP ............................................................ 23
PRE-WALK-THRU CHECK LIST ............................................ 24
SYS TEM OP ER A TION ..................................................... 25
BTR-300 OP ER A TION .................................................... 25
TR-300 OP ER A TION ...................................................... 26
EN ABLING AU DIO ....................................................... 27
SETTING SYS TEM GAIN LEVELS ......................................... 28
SYS TEM WALK-THRU ..................................................... 29
TROU BLE SHOOTING ..................................................... 30
BAT TERY IN FOR MA TION ................................................. 31
AC CES SORIES ............................................................ 33
CUS TOMER SER VICE IN FOR MA TION ...................................... 34
FCC IN FOR MA TION ....................................................... 35
-i-
IN TRO DUC TION
GEN ERAL DE SCRIP TION
This man ual cov ers the BTR-300 Base Sta tion
and the TR-300 Por ta ble Trans ceiver.
The RadioCom Models BTR-300 and TR-300
were spe cif i cally de signed to pro vide the user
with a highly flex i ble wire less two-way com mu ni ca tion sys tem with the ca pa bil ity to in ter face with a wired in ter com sys tem and other
aux il iary au dio.
At the BTR-300 op er a tor’s com mand, the
remotes may com mu ni cate with each other,
with a wired in ter com sys tem or with an aux il iary sys tem. The BTR-300 Base Sta tion with
its one trans mit and four re ceive chan nels is
de signed to op er ate in full du plex (si mul ta neous two-way communications) with up to
four TR-300 Belt Pack trans ceiv ers. See block
di a gram in Fig ure 1.
Fig ure 1
Block Di a gram of Sys tem
-1-
The sys tem op er ates on se lected fre quen cies
within the 150-216 MHz band.
The BTR-300 sys tem is fully com pat i ble with
a num ber of other wired in ter com man u fac tur ers units. See the BTR-300 Setup Sec tion for
additional in for ma tion.
The TR-300 Trans ceiver op er ates in the con tin u ous trans mit mode with the au dio ac ti vated
by a switch. As many as four TR-300
belt-pack trans ceiv ers can op er ate in a fully
du plex net work with one RadioCom Model
BTR-300 Base Sta tion.
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BTR-300 BASE STATION TRANS CEIVER
TECH NI CAL IN FOR MA TION
SPEC I FI CA TIONS BTR-300
In put Power (min i mum) .................................................................................... 12V AC/DC at 360 mA
In ter com Out put ......... 330 mV (Low) or 1 V (Hi) RMS into 300 ohm load typ i cal (at rated de vi a tion)
In ter com Input (Gain Min i mum) ......................................... 300 mV RMS typ i cal (for rated de vi a tion)
Aux il iary Out put ............................................. 2 V RMS into 600 ohm load typ i cal (at rated de vi a tion)
Aux il iary In put (Gain Max i mum) .......................................... 60 mV RMS typ i cal (for rated de vi a tion)
Lo cal Head set In put ....................................................................................... 2 mV RMS in put nom i nal
1.5 mV RMS in put at com pres sion (Dy namic)
Lo cal Head set Out put ............................................................. 32 mV max i mum out put into 600 ohmst
Tem per a ture Range ................................................................................. -4
Dimensions ............................................................................................. 15.75” W x 1.75” H x 10.5” D
Weight ................................................................................................... ............................. 4.5 lbs (2 kg)
Trans mit
RF Fre quency Range ................................................................................................... ..... 150-216 MHz
RF Fre quency Sta bil ity ................................................................................ Crys tal Con trolled, 0.005%
RF Power Out put ................................................................................................... ......... 50 mW Typ i cal
Mod u la tion ................................................................................................... ........ FM, 3 KHz de vi a tion.
Trans mit An tenna ................................................................................................... .5/8-wave (sup plied)
Mod u la tion Lim iter ................................................................................................ In ter nal Com pres sor
Mod u la tion Fre quency Range ............................................................................ 300 to 5000 Hz ±2 dB
Ra di ated Har monics and Spu ri ous Emis sions .......................................................................... -45 dBC ,
FCC ............................................................................................. Type Ac cepted Un der Parts 90 and 74
°F to 130° F (-20° C to 55° C)
(40 cm x 4.5 cm x 26 cm)
115 mi cro-seconds Pre-emphasis
SO239 con nec tor on chas sis
Ex ceeds FCC Spec i fi ca tions
-3-
SPEC I FI CA TIONS BTR-300 (Cont.)
Receive
RF Fre quency Range ................................................................................................... .... 150-216 MHz
RF Fre quency Sta bil ity ................................................................................ Crys tal Con trolled, 0.005%
Type ............................................................................................ Dual con ver sion super het ero dyne, FM
RF Sen si tiv ity ................................................................................ Less than 0.5 µV for 12 dB SINAD
IF Se lec tiv ity ........................................................................ 3 dB at 30 kHz (4 pole Monolythic Fil ter)
Im age Re jec tion ................................................................................................... ........... 65 dB or better
Squelch Quieting ................................................................................................... ........................ 90 dB
Squelch Thresh old ................................................................................................... ..... 1.0 µV (In ter nal)
Sig nal-to-Noise Ra tio .................................................................................................................... 90 dB
Re ceive An tenna ................................................................................................... ... 5/8-wave (sup plied)
SO239 con nec tor on chas sis
Dis tor tion ................................................................................................. Less than 1% at Rated Out put
FEA TURES
The RadioCom Model BTR-300 is a Base
Station with one trans mit ter and four re ceivers. It is de signed for por ta ble two way
com mu ni ca tion with the ca pa bil ity for in ter face to other au dio sys tems. Fea tures in clude:
• An ex tremely flex i ble unit that has the ca pa -
bil ity to com mu ni cate at one time with up to
four por ta ble sta tions and wired sta tions (in ter com and/or other au dio source).
• Powered by an ex ter nal AC sup ply via the
power jack on the rear of the unit. It can
also be pow ered by any 12V AC/DC 700
mA source.
• In ter com con nec tions with the abil ity to in -
ter face with most wired in ter com sys tems.
• RF light in di ca tor for each por ta ble station.
• All metal case for su pe rior shielding.
• Ta ble or rack mountable.
-4-
CON TROLS and CON NEC TIONS
1
2
3
4
FRONT PANEL (Re fer to Fig ure 3)
Power ON/OFF Switch: Push this switch
once to turn power ON; push it again to turn
the power OFF.
Mic On-Push-to-Talk/Lock-to-Talk Switch:
En ables the lo cal head set mi cro phone au dio
func tion.
Power ON In di ca tor: The Power ON light is
il lu mi nated when the Power ON/OFF Switch
is pushed in the ON Po si tion.
Lo cal Head set Con nec tor: 4 Pin XLR Con nec tor for In put/Out put. The head set jack will
ac cept many Telex model head sets. Com pat i ble with other intercom head sets with four pin
XLR con nec tors that are wired as shown in
Fig ure 2.
NOTE: DOES NOT con trol base sta tion RF
transmit.
Lo cal Push-to-Talk In di ca tor: Will be il lu mi nated when ever the talk func tion is on.
Lo cal Mi cro phone Gain Con trol and
Overmodulation In di ca tor: A screw driver
ad just able con trol is pro vided to con trol the
in put level of the lo cal head set mic . This in put
is pro tected from over loads by means of a gain
com pres sor whose op er a tion is sig naled by the
gain light in di ca tor.
Por ta ble En able Switches and In di ca tors:
When in the “IN” po si tion, the En able
switches al low the user of the cor re spond ing
por ta ble unit to be heard by oth ers con nected
to the sys tem. When in the “OUT” po si tion,
the re spec tive por ta ble will be muted, but this
por ta ble will still be able to hear all other se lected remotes and in ter faces. The in di ca tors
(Por ta ble Trans mit On) nor mally show the
pres ence of a por ta ble trans ceiver in use on the
chan nel cor re spond ing to that in di ca tor.
Fig ure 2
Head set XLR Con nec tor Wiring
Lo cal Head set Vol ume: Ad justs vol ume to
Lo cal Head set. DOES NOT AF FECT MI CRO PHONE GAIN .
-5-
Ex ter nal In ter com Switch, Level Con trol,
and in di ca tor: This switch en ables the wired
in ter com in ter face when “IN”, and dis ables it
when “OUT”. For RTS in ter coms, the “IN”
po si tion is chan nel 1 and the “OUT” po si tion
is chan nel 2. A screw driver ad just able con trol
is pro vided to con trol the in put level of the
wired in ter com.
Aux il iary Au dio En able Switch, Level Con trol, and In di ca tor: The switch en ables and
dis ables the Aux il iary in ter face when “IN”
and “OUT”, re spec tively. The func tion of the
level control here is the same as that de scribed
for the in ter com.
REAR PANEL (Re fer to Fig ure 4)
Trans mit and Re ceive An tenna Con nec tors:
At tach 5/8-wave an ten nas (sup plied) to these
con nec tors; An tenna color should match the
“color dot.”
Trans mit Switch: Slide switch that al lows the
op er a tor to se lect one of three trans mit modes.
In the “OFF” po si tion, the trans mit ter is al ways off. This mode may be used if the base is
func tion ing solely as a mon i tor. In the
“CONT” po si tion, the trans mit ter is al ways
on. This con tin u ous mode is rec om mended
over the “RE MOTE” mode. In the “RE MOTE” po si tion, the trans mit ter is en abled
only when one or more portables are ac tive.
Head set Mi cro phone Se lect Switch: This
switch al lows the user to se lect ei ther an
Electret or Dy namic mi cro phone.
In ter com Con nec tors: Con nec tions to in ter face the BTR-300 with a wired in ter com sys tem.
Aux il iary Out put/In put Con nec tors: Can be
used for 2-way (four wire) in put and out put to
the BTR-300 or as a sim plex in put or out put.
Typ i cal uses are 4 wire in ter com’s, tape re cord ers, pub lic ad dress in puts or out puts.
Power Jack: For ex ter nal AC sup ply adap tor
(sup plied).
Speaker Jack: Al lows the use of an ex ter nal
mon i tor if de sired. An 8 ohm speaker is rec om mended.
Speaker Volume Con trol: Screw driver ad just able. Ad just clock wise to in crease speaker
volume or coun ter clock wise to de crease
speaker volume.
NOTE: Leave set ting coun ter clock wise if no
speaker is at tached.
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-7-
-8-
TR-300 BELT-PACK TRANS CEIVER
TECH NI CAL IN FOR MA TION
SPEC I FI CA TIONS TR-300
Over all
Power Re quire ments ............................................................... 6 AA cells (Al ka line, NEDA , MN 1500)
Nickel-metal hy dride op tional
Cur rent Drain ................................................................................................... ................. typ i cal 82 mA
Tem per a ture Range ................................................................................. -4°F to 130°F (-20°C to 55°C)
Di men sions ............................................................................................... 4.25” W x 4.125” H x 2.0” D
(108mm x 105mm x 51 mm)
Weight ................................................................................................... ....... 13 oz (369g) with bat ter ies
Trans mit An tenna ............................................................................................ 1/4-wave wire (at tached)
Re ceive An tenna .............................................................................................. 1/4-wave wire (at tached)
Trans mit
RF Fre quency Range ........................................................................................................ 150-216 MHz
RF Fre quency Sta bil ity ................................................................................ Crys tal Con trolled, 0.005%
RF Power Out put ................................................................................................... ......... 50 mW Typ i cal
Mod u la tion ................................................................................................... ..... FM, 3000 Hz de vi a tion,
115 mi cro-seconds Pre-emphasis
Mod u la tion Lim iter ................................................................................................ In ter nal Com pres sor
Mod u la tion Fre quency Range ......................................................................... 300 to 5000 Hz +/_ 2 dB
Mi cro phone Au dio In put .............................................................................................. 30 to 3500 ohms
Mi cro phone In put Sen si tiv ity ................................................................. 2 mV Dy namic, 4 mV Electret
Ra di ated Har monics and Spu ri ous Emis sions .......................................................................... -45 dBC ,
Ex ceeds FCC Spec i fi ca tions
FCC ............................................................................................. Type Ac cepted Un der Parts 90 and 74
RF Fre quency Range ........................................................................................................ 150-216 MHz
RF Fre quency Sta bil ity ....................................................................... Crys tal Con trolled, 0.005% Type
RF Sen si tiv ity ................................................................................. Less than 0.5 µV for 12 dB SINAD
IF Se lec tiv ity ........................................................................................3 dB at 30 kHz (Ce ramic Fil ter)
Im age Re jec tion ................................................................................................... ........... 70 dB or better
Squelch Quieting ................................................................................................... ........................ 90 dB
Squelch Thresh old ................................................................................................... ..... 3.0 µV (In ter nal)
Sig nal-to-Noise Ra tio .................................................................................................................... 90 dB
Au dio Out put ...................................................................................... 32 mW into 600 ohms (Head set)
Dis tor tion ................................................................................................. Less than 1% at Rated Out put
Re ceive
Dual Con ver sion Super het ero dyne, FM
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FEA TURES
• Light weight, small size and is
self-contained.
• 2 sep a rate an ten nas, one for trans mit, the
other for re ceive.
CON TROLS AND CON NEC TIONS
EX TER NAL CON TROLS (Re fer to Fig ure 6)
Vol ume OFF/ON Con trol: This thumbwheel
con trol serves as both an off/on switch and as
a vol ume con trol.
Low Bat tery and Overmodulation
In di ca tor Light:
Low Bat tery In di ca tor: Part of the bat tery
check cir cuit. When the power switch is
placed in the “ON” po si tion the light will
flash one or more times if the bat tery is
good. A poor bat tery will cause the light to
il lu mi nate continuously and a bad or un us able bat tery will not cause any illumination
at all.
• Push-to-Talk with Lock-to-Talk fea ture
switch for the TR-300 and Push-to-Transmit
with Lock-to-Transmit fea ture for the
TR-300P.
Head set Jack: A four pin XLR con nec tor for
In put/Out put. The head set jack will ac cept
many dif fer ent Telex model head sets. Com pat i ble with other intercom head sets with four pin
XLR con nec tors that are wired as shown in
Fig ure 5.
Charge Jack: Al lows nickel-metal hy dride
bat ter ies to be charged with out re mov ing them
from the unit.
Overmodulation In di ca tor: Uses the same
light as the low bat tery in di ca tor. Dur ing the
talk mode, if the mi cro phone gain is too
high, the light will il lu mi nate when talk ing.
Push-To-Talk, Lock-To-Talk Switch:
This switch en ables the talk func tion.
Talk In di ca tor Light: (La beled “talk”) will
be il lu mi nated when ever the talk func tion on
the TR-300 is en abled.
Fig ure 5
Head set XLR Con nec tor Wiring
-10 -
Fig ure 6
Ex ter nal Con trols, TR-300
-11 -
In ter nal con trols, TR-300
IN TER NAL CON TROLS (Re fer to Fig ure 7)
Fig ure 7
Mi cro phone Gain Con trol: Screw driver ad -
just able by re mov ing belt clip and pry ing out
the small rub ber plug to the right of the screw
boss.
Dy namic/ Electret Switch: This switch al lows
se lec tion of “D” when us ing a Dy namic Mi cro phone or “E” when us ing and Electret Mi cro phone.
Bat tery Com part ment: Holds 6 AA bat ter ies
in a re mov able bat tery holder (sup plied).
-12 -
EQUIP MENT SET-UP
BTR-300 SET-UP
UN PACKING
Un pack your BTR-300 and TR-300 Sys tem. If
there are any dam ages or short ages, re fer to
the “War ranty Ser vice Information” sec tion in
this man ual.
IN TER NAL IN TER COM SWITCHES
The BTR-300 has in ter nal switches that al low
it to ac com mo date in ter com sys tems other
than what it was set to in ter face with when
man u fac tured. Prod uct No. 71276XXXX is set
for Telex Au dio Com and sim i lar sys tems.
Prod uct No. 71280XXXX is set for RTS 2
wire and sim i lar sys tems. Units orig i nally set
for Telex may be set to RTS and vice versa.
Both mod els may be set to in ter face with
Clearcom , and 4 wire RTS/ McCurdy ma trix
type sys tems. The fol low ing para graphs ex plain how to change the switches if nec es sary.
Re move Cover: Re move the cover screws
(13) and lift off the cover.
DIP Switch: See Fig ure 8 and Ta ble 1. Set the
DIP switch as shown in the ta ble.
High/Low Switch: See Fig ure 8 and Ta ble 2.
Set the high/low switch as shown in the ta ble.
In ter com Switch: See Fig ure 8 and Ta ble 2. Set
the switch to 2 wire for all 2 wire sys tems. Set
the switch to 4 wire if the BTR is to be con nected to a bal anced 4 wire in ter com sys tem
through the Aux il iary in put and out put jacks.
Note: Do not con nect both 4 wire and 2 wire sys tems at the same time. Loud feed back may re sult.
Re place Cover: Care fully align the cover and
re place the screws.
IN TER COM JACK WIRING
CON FIG U RA TIONS
See Ta ble 3 for the wir ing of the in ter com and
aux il iary jacks.
DIP SWITCH PO SI TION
1 2 3 4 5 6 7 8 9
Telex Audiocom ON ON OFF ON OFF ON OFF OFF ON
RTS 2 wire OFF OFF ON OFF ON OFF ON ON OFF
Clearcom ON OFF ON ON OFF OFF OFF ON ON
4 Wire N/A N/A N/A N/A N/A N/A N/A N/A N/A
Ta ble 1
IN TER COM LOW/HIGH IN TER COM
TYPE SWITCH SWITCH
Telex
Au dio Com Low 2 wire
RTS High 2 wire
Clearcom Low 2 wire
4 wire N/A 4 wire
Ta ble 2
-13 -
In ter nal Aux il iary Au dio Out Aux il iary Au dio In put In ter com Loop Thru
Switch
Set tings Pin 1 Pin 2 Pin 3 Pin1 Pin 2 Pin 3 Pin 1 Pin 2 Pin 3
Telex Au dio
Com Ground 600 ohm 600 ohm Ground 2.2K ohm 2.2K ohm Ground Bal anced Bal anced
Bal anced Bal anced Bal anced Bal anced
(both jacks)
RTS 2 wire Ground 600 ohm 600 ohm Ground 2.2K ohm 2.2K ohm Ground Chan nel Chan nel
Clearcom Ground 600 ohm 600 ohm Ground 2.2K ohm 2.2K ohm Ground Power Au dio
4 wire Ground Bal anced Bal anced Ground Bal anced Bal anced Do Not Do Not Do Not
Bal anced Bal anced Bal anced Bal anced 1 2
Bal anced Bal anced Bal anced Bal anced
In ter com In ter com In ter com In ter com Use Use Use
Out Out In In
Ta ble 3
Pin Wiring for Rear Panel Jacks
Fig ure 8
In ter nal In ter com Switches
-14 -
RACK MOUNTING
To rack mount the BTR-300 base trans ceiver
do the fol low ing:
Re move the front two #6-32 x 3/8” screws
on each side of the trans ceiver as shown in
Fig ure 9.
Place the rack mount brack ets (sup plied) on
ei ther side of the unit and in sert three #6-32 x
3/8” screws for each bracket. Tighten the
screws se curely.
In sert the BTR-300 into your 19” rack en clo sure and in sert four (4) #10-32 x 3/8” Phil lips
pan head screws (sup plied) in each cor ner of
the rack mount brack ets and se cure to your en clo sure.
Fig ure 9
Attaching Brackets for Rack Mount ing
-15 -
AN TENNA CON NEC TIONS
AN TENNA IN FOR MA TION
The BTR-300 is sup plied with two (2) an ten nas. One 5/8-wave an tenna for Trans mit and
one 5/8-wave an tenna for Trans mit and one
5/8-wave for Re ceive.
As sem ble the 5/8-wave an tenna by screw ing
the two sec tions to gether as shown in Fig ure
10. Both sec tions of the BTR-300 5/8-wave an ten nas must be used. Leaving off the top sec tion will re sult in re duced range.
To in sure that the fre quency of the an ten nas
match the re ceiver and trans mit ter of the
BTR-300 , match the color dot on the an tenna
with the color dot on the BTR-300
At tach the an ten nas to the an tenna in put re cep ta cles un less the BTR is rack mounted.
Tighten the con nec tor se curely.
Fig ure 10
5/8-wave An tenna As sem bly
Fig ure 11
Attaching 5/8-wave An tenna
-16 -
Remoting An tennas: It will be nec es sary to
re mote both the trans mit and re ceive an ten nas
on the BTR-300 when it is rack mounted.
Con nect the coax ca ble as sem bly (not sup plied), to the re ceive an tenna re cep ta cle and
mount the 5/8-wave an tenna. The an tenna can
be at tached to either a wall mount bracket or a
mi cro phone stand bracket (not supplied). See
“Ac ces sory” sec tion for or der in for ma tion.
You will also need to re mote the trans mit an tenna in the same man ner. Con nect a coax ca ble as sem bly to the trans mit an tenna
re cep ta cle. Mount the 5/8-wave an tenna by at tach ing it to a bracket (not sup plied).
Remoting An tennas when Rack Mounted
Fig ure 12
-17 -
AN TENNA PO LAR IZA TION
The Telex Wire less In ter com Sys tem is “Ver ti cally Po lar ized”. This means both the trans mit ting and re ceiv ing an ten nas should op er ate
in the ver ti cal po si tion.
Fig ure 13
Ver ti cally Po lar ized An tennas
Fig ure 14
Proper Dress ing of the An tennas
Keep the dis tance be tween the base
(BTR-300 ) and the belt pack (TR-300) an ten nas as short as pos si ble. The greater the dis tance, the weaker the sig nal. How ever, the
portables should be a min i mum dis tance of 10
feet from the base sta tion and each other for
best per for mance.
AN TENNA PLACE MENT
Proper an tenna place ment prob a bly has the
most ef fect on you TELEX Wire less in ter com
Sys tem’s over all per for mance. The fol low ing
sug ges tions will re sult in op ti mum per for mance.
Proper place ment of the TR-300 can be crit i cal. The trail ing an ten nas should “dan gle”
freely. “Wadding” the an ten nas up and plac ing
them in a pocket, etc., will re duce sys tem
range.
It is sug gested that the unit be worn on the belt
or pocket with both an tenna’s hung ver ti cally
for best op er at ing range and per for mance.
Make sure the “sig nal paths” be tween the
BTR-300 and remotes are un ob structed. You
should al ways be able to vis i bly lo cate the an ten nas for best per for mance.
Fig ure 15
Keeping Site Clear to An tenna
-18 -
At tempting to op er ate the wire less in ter com
sys tem through or around walls, ceil ings,
metal ob jects, etc. will re duce sys tem range
and per for mance.
SIG NAL RE FLEC TION OFF A METAL OB STRUC TION
CAUSES RE DUCED SIG NAL AND “ MULTIPATH ”
Fig ure 16
Op er ating Sys tem Near Obstructions
DO NOT - mount the BTR-300 5/8-wave an -
ten nas next to metal such as beams, walls
with metal studs, equip ment racks, etc. This
also ap plies to the an ten nas when as sem bled
di rectly to the BTR-300 . This will “ de tune ”
the re ceiv ing an tenna which can re sult in
noise or loss of RF sig nal at the BTR-300 .
See Fig ure 17.
1. Placing the unit in an
equip ment rack and
remoting the an ten nas
is GOOD.
2. Placing the unit on top of
a shelf or equip ment rack
un ob structed with out
remoting the an ten nas is
GOOD.
3. Placing the unit in an
3. Placing the unit in an
equip ment rack with
equip ment rack with
the an ten nas mounted
the an ten nas mounted
on the BTR-300 or the
on the BTR-300 or the
side of the rack is BAD.
side of the rack is BAD.
Fig ure 17
BTR-300 An tenna Place ment
-19 -
LO CAL HEAD SET CON NEC TION
Headset Mic
Dyn
Elt
Transmit
In sert the head set/mi cro phone into the 4 pin
XLR con nec tor on the front panel. See the mi cro phone con nec tion di a gram (Fig ure 2) if
other than a Telex Head set is used.
HEAD SET MI CRO PHONE SE LECT
SWITCH
If the head set you are us ing has an Electret
mi cro phone, the lo cal mi cro phone se lect
switch must be in the “ ELT ” po si tion
(Electret ). This switch is lo cated on the rear
panel. A +5 volt bias is avail able at the mi cro phone plug for electret use.
If you are us ing a head set with a dy namic mi cro phone, place the lo cal mi cro phone se lect
switch in the “DYN” po si tion (Dy namic).
NOTE: FOR PROPER OP ER A TION YOU
MUST MATCH THE TYPE OF MI CRO PHONE YOU ARE USING WITH THE
DYNAMIC/ ELECTRET SWITCH LO CATED ON THE REAR OF THE UNIT.
Fig ure 18
Con necting Head set to the BTR-300
TRANS MIT SWITCH
Al lows the op er a tor to se lect three dif fer ent
types of trans mitting modes; con tin u ous trans mit ter, transmitter off, or re mote trans mit ter.
For most operations, place the transmitter
switch in the “CONT” po si tion (Con tin u ous
mode).
In the Con tin u ous mode the trans mit ter will be
on at all times re gard less of whether the
portables are on or not.
In the Re mote mode, the only time the base
can trans mit is when a por ta ble unit is turned
on.
In the Off mode the BTR-300 base sta tion will
not trans mit to the re mote belt-packs. This
mode might be used if the base is to be a mon i tor sta tion only.
Fig ure 19
Head set Mi cro phone Se lect Switch
Fig ure 20
Trans mit Switch
-20 -
IN TER CON NEC TION to a HARD-WIRED
IN TER COM SYS TEM
The RADIOCOM wire less sys tem can be
integrated into Telex in ter com sys tems and
most ex ist ing wired in ter com sys tems in clud ing RTS and Clearcom .
Con nect the in ter com ca ble to the back of the
BTR-300 . There are two intercom con nec tions
on the back of the unit, one be ing a male con nec tor, the other a fe male con nec tor, con nected in par al lel with each other. Either
works as an in put or out put.
Fig ure 21
Typ i cal In ter face to Wired Sys tem
-21 -
Fig ure 22
Con necting Two BTR-300’s
CON NECTING AUX IL IARY AU DIO SYS TEM
Con nect the BTR-300 to your aux il iary au dio
via the Aux il iary in put/out put re cep ta cles on
the rear of the unit.
CON NECTING BTR-300’s
Con nect the first BTR-300 to other BTR-300s
by us ing short XLR type ca bles (not sup plied)
plugged into ei ther of the in ter com jacks. See
Fig ure 22.
Note that the sta tions need to be on dif fer ent
fre quen cies.
POWER CON NEC TION
In sure the Power ON/OFF Switch on the front
of the BTR-300 is in the “OFF” po si tion. Con nect the AC power sup ply cord to the BTR at
the socket la beled “POWER”. Plug the power
sup ply unit into an AC out let.
DUMMY LOAD
In the case where a wired in ter com will not be
used with the BTR-300 , it is im por tant that the
dummy load (sup plied) be in stalled. The
dummy load should be plugged into the “In ter com Loop-Thru” con nec tor. See Fig ure 22.
NOTE: If the dummy load is not used an an noy ing squeal may re sult that may cause dam age to the ears.
Fig ure 23
Con necting the Power Sup ply
-22 -
TR-300 SET-UP
HEAD SET CON NEC TION
In set the head set/mi cro phone into the con nec tor on the bot tom of the unit. See the con nec tion di a gram (Fig ure 5) if head sets other than
Telex are used.
Fig ure 24
Con necting Head set
DY NAMIC/ ELECTRET SWITCH
If the head set you are us ing has an electret mi cro phone, the dy namic/ electret switch must be
in the “E” po si tion. This switch is ac ces si ble
by re mov ing the belt clip and re mov ing the
bat tery holder. A +5 volt bias is avail able at
the mi cro phone plug for electret use.
If you are us ing a head set with a dy namic mi cro phone, place the dy namic/ electret switch in
the “D” po si tion.
NOTE: for proper op er a tion you must match
the type of mi cro phone you are us ing with the
dy namic/ electret switch lo cated in side the bat tery com part ment.
BAT TERY IN STAL LA TION
In sure that the OFF/ON Volume con trol knob
is turned OFF. Ac cess the bat tery com part ment by re mov ing the belt clip on the back of
the unit. Re lease the 1/4 turn fas tener lo cated
on the back of the belt clip and re move belt
clip/cover.
Re move the bat tery holder from the box. In sert six (6) AA bat ter ies in the holder, pay ing
close at ten tion to po lar i ties of the bat ter ies. It
may be nec es sary to turn the bat ter ies with the
thumb and fore fin ger the first few times the
bat ter ies are in serted into the bat tery holder to
in sure good pos i tive con tact. In sert the holder
into the case and re place the belt clip/bat tery
cover and en gage the 1/4 turn fas tener.
Fig ure 26
Bat tery In stal la tion
NOTE: For max i mum un in ter rupted ser vice it
is sug gested that new 1.5 volt al ka line AA bat ter ies be in stalled prior to each use. Avoid
“shelf worn” or “eco nom i cal” bat ter ies. Op er a tion from nickel metal hy dride bat ter ies is
also per mis si ble. Typ i cal life of fresh al ka line
bat ter ies with the TR-300 is ap prox i mately 24
hours max i mum, 15-17 hours is typ i cal of
fully charged nickel-metal hy dride bat ter ies.
Fig ure 25
Dy namic/ Electret Switch
NOTE: Re charge able bat ter ies can be charged
right in the TR-300 us ing the Telex
BC-300NM1 Bat tery Charger. Re fer to “Bat tery In for ma tion” Sec tion. Re charge able bat ter ies in the holder can be charged us ing the
Telex BC-300NM2 charger.
-23 -
PRE-WALK-THRU CHECK LIST
Fol low ing the in struc tions fully to this point,
you have suc cess fully com pleted the fol low ing
check list:
Set (if nec es sary) the in ter nal in ter com switches to cor re spond with
the wired in ter com.
Lo cated the BTR-300 trans ceiver
prop erly.
Con nected power to BTR-300
transceiver.
Con nected the an ten nas to the
BTR-300 with matched color codes.
Set Dy namic/ Electret switches in
both BTR-300 and TR-300.
Set trans mit switch on BTR-300 .
Con nected head sets to BTR-300
and all TR-300’s
Con nected the BTR-300 to any aux il iary audio, in ter com or ex ter nal
speaker.
In stalled bat ter ies in the TR-300
Re mote Trans ceiver.
If you missed any of the above instructions, go
back and com plete that instruction before go ing on.
-24 -
SYS TEM OP ER A TION
BTR-300 OP ER A TION
POWER
If you have followed the instructions un til this
point, you should now be ready to turn both
the TR-300 and the BTR-300 “ON”.
Place the power switch on the BTR-300 in the
“ON” po si tion. The red power on in di ca tor
light should il lu mi nate.
Fig ure 27
Power ON/OFF - Vol ume Con trol Knob
PUSH TO TALK/LOCK-TO-TALK SWITCH
To en able the talk func tion on the BTR-300 ,
press and hold down on the talk but ton and
begin talk ing. Re leasing the talk but ton will
dis con tinue the mi cro phone au dio. For con tin u ous talk, quickly press the talk but ton twice.
This en ables the talk function as long as you
want. To re lease the talk func tion press the
talk but ton once more and the talk function
will cease.
NOTE: The talk light will be il lu mi nated
when ever the talk func tion is ac ti vated.
LO CAL HEAD SET VOL UME
Ad just the vol ume con trol on the BTR-300 by
ro tat ing the vol ume con trol ei ther clockwise
or counterclockwise as re quired for com fort able lis ten ing vol ume.
Fig ure 28
Vol ume Con trol - BTR-300
Fig ure 29
Push-to-Talk/Lock-to-Talk Switch
-25 -
TR-300 OP ER A TION
POWER
You should now be ready to turn the TR-300
“ON”. Ro tate the OFF/ON Vol ume Con trol
Switch on the TR-300 clock wise to turn the
unit on.
BAT TERY CHECK
As you turn the unit on, note that the bat tery
light (la beled bat/ ovmod ) should flash one or
more times with good bat ter ies. Low bat ter ies
will cause the light to be il lu mi nated con tin u ously and a bad bat tery will not cause any
illumination at all.
Fig ure 30
Low Bat tery/ Overmodulation
and Talk In di ca tor Lights
PUSH TO TALK/PUSH TO TRANS MIT
To en able the talk function on the Model
TR-300 press and hold down on the talk but ton and be gin talk ing. Re leasing the talk but ton will dis con tinue the mi cro phone au dio.
For con tin u ous talk, quickly press the talk but ton twice. This locks on the talk func tion. To
re lease the talk func tion press the talk but ton
once. Note that the TR-300 trans mits any time
that the power is on.
NOTE: The talk light will be il lu mi nated
when ever the talk func tion is ac ti vated.
HEAD SET VOL UME
Af ter bat ter ies have been checked, ad just the
vol ume con trol by ro tat ing the con trol as re quired for com fort able lis ten ing vol ume.
Fig ure 31
Power ON/OFF - Vol ume Con trol - TR-300
Fig ure 32
Push-to-Talk/Lock-to-Talk Switch
-26 -
POR TA BLE TRANS CEIVERS
EN ABLING AU DIO
Se lect the TR-300 portables that will be used
with the BTR-300 . Push in the por ta ble en able
switches that cor re spond to the TR-300
remotes that you will be us ing. The num bers
of the por ta ble sta tions (1, 2, 3, and 4), are the
last digit of the prod uct num ber on the back of
the TR-300. The Por ta ble Trans mit On light
will il lu mi nate when the re mote on that fre quency is turned on. The in di ca tors may also
light in response to out side in ter fer ence on
that chan nel or to intermodulation aris ing
from portables be ing used at too close a dis tance to the base. To pre vent these sources
from cre at ing un de sir able noise, all un used
chan nels should be dis abled.
IN TER COM SWITCH
The in ter com switch in the front of the unit
will act as an en abling switch when the unit is
be ing used with ei ther a Telex Audiocom
wired in ter com or Clearcom wired in ter com.
When us ing a RTS sys tem wired in ter com the
switch will act as a chan nel se lec tor switch for
se lect ing of ei ther chan nel 1 or chan nel 2.
AUX IL IARY
The AUX Switch on the front of the BTR-300
will en able any aux il iary au dio in put (or 4
wire in ter com) that is sup plied to the unit.
Fig ure 33
En able Switches
-27 -
SETTING SYS TEM GAIN LEVELS
AD JUSTING GAIN
The gain may need to be ad justed for var i ous
au dio con di tions. The overmodulation light
will in di cate when the gain is too high. If the
light is il lu mi nated when you are talk ing, the
gain is too high and will need to be de creased.
If the light does not flash at all, and the au dio
is low, the gain may need to be in creased. An
oc ca sional flash of the overmodulation in di ca tor is fine.
Using a plas tic screw driver (sup plied), ad just
the con trol clockwise to in crease the gain or
coun ter clock wise to de crease the gain. Note
that the gain can also be ad justed by chang ing
the spac ing be tween the mi cro phone and your
mouth.
BTR-300 BASE STATION
The mi cro phone overmodulation in di ca tor
light for the BTR-300 head set can be found on
the right side of the front panel. The mi cro phone gain con trol po ten ti om e ter is lo cated to
the left of the in di ca tor light.
TR-300 POR TA BLE
The overmodulation cir cuitry in the TR-300
uses the same light as the low bat tery cir cuitry.
If modulation is too high this light will il lu mi nate when talk ing.
If the gain needs to be ad justed, re move the
belt clip on the rear of the unit and pry out the
small rub ber plug to the right of the screw
boss. This will re veal the mi cro phone gain
con trol po ten ti om e ter. Once ad justed, re place
the rub ber plug.
Fig ure 34
Ad justing Mi cro phone Gain - BTR-300
Fig ure 35
Ad justing Mi cro phone Gain - TR-300
-28 -
IN TER COM GAIN
AUX IL IARY GAIN
If the au dio vol ume at the in ter com in put is
too high, the light will be il lu mi nated when
the per son on the in ter com is talk ing. De crease the gain un til the light does not il lu mi nate while talk ing at nor mal vol ume.
Oc ca sional flash ing of the light is al low able.
See Fig ure 36.
Fig ure 36
Aux il iary Gain con trols
SYS TEM WALK-THRU
Now that you have suc cess fully “set up” your
RadioCom Wire less In ter com Sys tem and
turned on any aux il iary equip ment you are
ready to test the over all per for mance by
“Walking” the RadioCom sys tem through the
ar eas in which you will be us ing it.
If the au dio vol ume at the aux il iary in put, is
too high, the Aux light will be il lu mi nated
when the per son on the aux il iary is talk ing.
De crease the aux il iary gain un til the aux il iary
light does not il lu mi nate while talk ing at nor mal vol ume. Oc ca sional flash ing of the aux il iary light is al low able. The aux il iary in di ca tor
has three states: OFF, HALF BRIGHT, and
FULL BRIGHT. When the switch is ”OUT”,
the in di ca tor is OFF. When the switch is “IN”
it be comes HALF BRIGHT, and when the in put is overmodulated it be comes FULL
BRIGHT.
The “sys tem walk-thru” can de tect prob lems
of weak sig nal strength caused by:
• Poor an tenna lo ca tion
• Wrong an tenna for re ceiver and/or trans -
mit ter.
Be fore you be gin your walk-thru check the
fol low ing:
TR-300 Bat tery Check.
Set mi cro phone gain in both the
TR-300 and the BTR-300
Check that the push-to-talk
switches are en gaged in the
Lock-to-talk position and the light
is il lu mi nated.
Por ta ble units to be used are en abled at the Base.
• RF “Trou ble Spots”
• Op er ating dis tance beyond sys tem ca pa bil ity.
• Old or used bat ter ies in the TR-300
Un der nor mal conditions the Por ta ble Trans mit On lights on the BTR-300 should al ways
be lit when portables are trans mit ting. “Weak
Sig nal” con di tions will re sult in flash ing of
the Trans mit light.
In 99% of all in stances you will set up your
RadioCom Wire less In ter com Sys tem, walk it
through and achieve er ror-free per for mance. If
in the rare in stance your RadioCom Sys tem
does not “pass” dur ing your walk-thru eval u a tion, re fer to the last sec tion of this man ual
which deals with sys tem trou ble shooting.
-29 -
TROU BLE SHOOTING
Re read the sec tions of this man ual to make
sure you have com pleted sys tem set-up prop erly.
PROB LEM SO LU TION
DIS TOR TION - Sys tem’s au dio qual ity
seems dis torted at me dium to high in put
lev els.
HISS - Sys tem seems to pro duce a “hiss”
which is un de sir able.
LOW OUT PUT - Sys tem pro duces a
low out put level.
FEED BACK - Moving around area of
use pro duces “squeal” or “howl” in var i ous lo ca tion us ing ext. speak ers.
DROP OUTS - When mov ing around the
area of use there seems to be lo ca tions
where the sig nal “ swooshes ” or com pletely dis ap pears.
If you are un able to solve the prob lem, con tract the dealer from whom you pur chased the
sys tem for as sis tance.
Re duce mi cro phone gain by ad just ing mi cro phone gain con trol.
Check the gain set ting on all beltpacks and
the base. They may be too low.
Check the gain set ting on both the beltpacks
and the base. They may be too low.
Re duce the gain set tings on both the
beltpacks and the base. They may be too
high.
Make sure both an ten nas on the base are
con nected and fol low the lo ca tion sug ges tions. Change the lo ca tion of the base unit
and an ten nas or avoid the bad ar eas with
the re mote beltpacks .
IN TER FER ENCE - Sys tem picks up
sig nals other than wire less In ter coms.
NO AU DIO from BASE or BELTPACK
head sets.
Make sure the TR-300 beltpack is turned
on - this will usu ally elim i nate the in ter fer ing sig nal. If not us ing a beltpack , make
sure the cor re spond ing en able switch at the
base is dis en gaged.
If prob lems per sist with the TR-300
beltpack on, you will prob a bly need to have
your sys tem’s fre quency changed to an other chan nel.
Check Trans mit ter switch on base, use
CONT or REMOTE po si tion. Check
push-to-talk func tion - is the switch ON?
-30 -
BAT TERY IN FOR MA TION
GEN ERAL
Im proper bat tery se lec tion, use, in stal la tion,
and care are the cause of nu mer ous wire less
sys tem fail ures.
BC-300NM1 BAT TERY CHARGER
NOTE: The BC-300NM1 is not sup plied with
the TR-300. See the “Ac ces sory” section for
or der ing in for ma tion.
CAU TION
DO NOT AT TEMPT TO CHARGE
ANY AL KALINE BAT TERIES WITH
THIS CHARGER.
Al ka line Bat teries: Al ka line bat ter ies such as
Mallory’s DURACELL or Everready’s EN ER GIZER pro vide the most re li able op er a tion in
wire less trans ceiv ers. The use of low cost car bon-zinc bat ter ies is NOT rec om mended.
The BC-300NM1 will charge nickel-metal
hydride bat ter ies in a TR-300. In sert the plug
from the charger into the jack on the side of
the TR-300 and plug the charger into a 110
volt out let.
Full charge of the bat tery pack is ob tained af ter 12 to 14 hours. A full charge will last
15-17 hours with nickel metal hy dride bat ter ies.
Ex ten sive over-charging may dam age or de stroy the bat ter ies. Please en sure the charg ing
time does not ex ceed 24 hours.
Figure 37
BC-300NM1 Bat tery Charger
EN ER GIZER® is a reg is tered trade mark of Un ion Car bide Cor po ra tion .
DURACELL® is a reg is tered trade mark of Duracell Inc.
Un plug the charger when not in use.
-31 -
BC-300NM2 BAT TERY CHARGER
NOTE: The BC-300NM2 is not sup plied with
the TR-300. See “Ac ces sory” Sec tion for or der ing in for ma tion.
Re move the bat tery holder from the TR-300.
CAU TION
DO NOT AT TEMPT TO CHARGE
ANY AL KALINE BAT TERIES WITH
THIS CHARGER.
Snap the ter mi nal con nec tor onto the bat tery
holder and plug the charger into a 110 Volt
out let.
Full charge of the bat tery pack is ob tained af ter 12 to 14 hours. A full charge will last 15
-17 hours with nickel-metal hy dride bat ter ies.
Ex ten sive over-charging may dam age or de -
stroy the bat ter ies. Please en sure the charg ing
time does not ex ceed 24 hours.
Un plug the charger when not in use.
Fig ure 38
BC-300NM2 Bat tery Charger
-32 -
AC CES SORIES
AB-300 Mi cro phone Stand/Sur face Mount
Bracket - for 5/8-wave an tenna.
In cludes nec es sary hard ware.
Or der No. 63906-100
25’ Coax Ca ble
Or der No. 63901-000
4’ Coax Ca ble
Or der No. 63901-001
5/8-Wave An tenna -
Screw apart for easy stor ing.
BC-300NM1 Bat tery Charger -
Or der No. 70741-001
In cludes 6 nickel-metal hy dride bat ter ies and
1 car rier. Charges a TR-300 with out re mov ing
the bat tery pack.
BC-300NM2 Bat tery Charger
Or der No. 70741-002
In cludes 6 nickel-metal hy dride bat ter ies and
1 car rier. Charges 1 set of bat ter ies outside of
the TR-300.
Or der No. Color Fre quency
Code Range
879248-1 Blue 150-168.9 MHz
879248-2 Yel low 169-184.9 MHz
879248-3 White 185-199.9 MHz
879248-4 Red 200-216 MHz
AC Power Sup ply 12 Volt, 60 HZ
Or der No. 730139-000
NMBP Bat tery Pack
Or der No. 70741-003
6 nickel-metal hy dride bat ter ies and car rier.
For use with BC-300NM1 and BC-300NM2.
Head sets
Telex Con fig u ra tion
Or der No.
PH-44 ..... 300853-100
PH-88 ..... 300852-100
HR-1 ...... 300534-007
HR-2 ...... 300534-000
RTS Con fig u ra tion
Or der No.
PH-44R ... 300853-101
PH-88R ... 300852-101
HR-1R .... 300534-008
HR-2R .... 300534-001
-33 -
CUS TOMER SER VICE IN FOR MA TION
If your re ceiver or trans mit ter should need ser vic ing un der the war ranty, please con tact:
Cus tomer Ser vice De part ment
TELEX COM MU NI CA TIONS, INC.
8601 East Cornhusker High way,
P.O. Box 5579,
Lin coln, Ne braska 68505-5579 U.S.A.
Phone: (402) 467-5321 or 465-7021
All claims of de fect or short age should be sent to the above ad dress. When re turn ing items
for ser vice, you must pro vide date and proof of pur chase, such as a copy of the sales re ceipt, to es tab lish war ranty. A let ter should be in cluded out lin ing all symp toms and claime d
de fects. In for ma tion on how the equip ment was in stalled and used is very help ful. Please
in clude your phone num ber and re turn ad dress in case our ser vice tech ni cians need to con tact you.
Units that have been mod i fied can not be ac cepted for re pair.
In clude all in for ma tion re quested by the Ser vice De part ment. Then pack the unit as fol lows :
Check the unit to see that all parts and screws are in place. Then wrap it in heavy pa per or
put it in a plas tic bag. If the orig i nal car ton is not avail able, place the unit in a strong c ar ton
that is at least six inches big ger in all three di men sions than the unit. Fill the car ton equal ly
around the unit with re sil ient pack ing ma te rial (shred ded pa per, foam, etc.). Seal it with
gummed pa per tape, tie it with a strong cord, and ship it by pre paid ex press, United Par cel
Ser vice or in sured par cel post to the Telex Ser vice De part ment.
It is very im por tant that the ship ment be well-packed and fully in sured. Dam age claims
must be set tled be tween you and the car rier and this can de lay re pair and re turn of the unit
to you.
Telex re serves the right to make changes in de sign and im prove ment on its prod uct with out
as sum ing any ob li ga tion to in stall the same on any of its prod ucts pre vi ously man u fac tured. Fur ther Telex re serves the right to ship new and/or im proved prod ucts which are sim i lar to the form, fit and func tion of prod ucts orig i nally or dered.
-34 -
FCC IN FOR MA TION
The Telex Models BTR-300 and TR-300 trans ceiv ers are Type Ac cepted
un der United States Fed eral Com mu ni ca tions Com mis sion Parts 90 and
74. Li censing of Telex equip ment is the user’s re spon si bil ity and
licensability de pends upon the user’s clas si fi ca tion, user’s ap pli ca tion,
and fre quency se lected. Telex strongly urges the user to con tact the ap pro pri ate tele com mu ni ca tions au thor ity be fore or der ing and choos ing fre quen cies.
CAU TION: Changes or mod i fi ca tions made by the user could void the
user’s au thor ity to op er ate the equip ment.
-35 -
R
TELEX COM MU NI CA TIONS, INC. 12000 Port land Ave. South, Bur nsville , MN 55337, U.S.A.
PN 803008-1 AUG 2000 Made in U.S.A
R
TELEX COM MU NI CA TIONS, INC. 12000 Port land Ave. South, Bur nsville , MN 55337, U.S.A.
PN 803008-1 AUG 2000 Made in U.S.A
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