Bosch Security Systems M511 Wireless Microphone Base Station Transmitter User Manual tr300

Bosch Security Systems, Inc. Wireless Microphone Base Station Transmitter tr300

NOT the Test Report

Download: Bosch Security Systems M511 Wireless Microphone Base Station Transmitter User Manual tr300
Mirror Download [FCC.gov]Bosch Security Systems M511 Wireless Microphone Base Station Transmitter User Manual tr300
Document ID81823
Application IDhQsPLvL2e1lKUoETm+iYWA==
Document DescriptionNOT the Test Report
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeUser Manual
Display FormatAdobe Acrobat PDF - pdf
Filesize95.09kB (1188592 bits)
Date Submitted2000-01-18 00:00:00
Date Available2000-03-31 00:00:00
Creation Date0000-00-00 00:00:00
Producing SoftwareAcrobat PDFWriter 3.02 for Windows
Document Lastmod1999-11-16 09:28:54
Document Titletr300.PDF
Document Creatortr300.vp
Document Author: Unknown

Telex

Operating Instructions
PROFESSIONAL
WIRELESS
INTERCOM SYSTEM
TR-300, TR-300P,
BTR-300
TABLE OF CONTENTS
INTRODUCTION..............................................................................................................................1
GENERAL DESCRIPTION............................................................................................................1
BTR-300 BASE STATION TRANSCEIVER ..................................................................................3
TECHNICAL INFORMATION ......................................................................................................3
SPECIFICATIONS ..................................................................................................................3
FEATURES..............................................................................................................................4
CONTROLS AND CONNECTIONS..............................................................................................5
FRONT PANEL .......................................................................................................................5
REAR PANEL .........................................................................................................................6
TR-300 BELT-PACK TRANSCEIVER...........................................................................................9
TECHNICAL INFORMATION ......................................................................................................9
SPECIFICATIONS ..................................................................................................................9
FEATURES............................................................................................................................10
CONTROLS AND CONNECTIONS............................................................................................10
EXTERNAL CONTROLS ...................................................................................................10
INTERNAL CONTROLS .....................................................................................................12
EQUIPMENT SET-UP....................................................................................................................13
UNPACKING ................................................................................................................................13
ANTENNA INFORMATION........................................................................................................13
ANTENNA CONNECTIONS ...............................................................................................13
ANTENNA POLARIZATION ..............................................................................................14
DISTANCE BETWEEN ANTENNAS .................................................................................14
ANTENNA PLACEMENT ...................................................................................................15
IMPROVING RECEPTION/INCREASING RANGE..........................................................16
BTR-300 SET-UP..........................................................................................................................17
LOCATION............................................................................................................................17
INTERNAL INTERCOM SWITCHES.................................................................................17
RACK MOUNTING..............................................................................................................19
LOCAL HEADSET CONNECTION ....................................................................................21
HEADSET MIC SELECT SWITCH.....................................................................................21
TRANSMIT SWITCH...........................................................................................................21
INTERCONNECTION TO A HARD-WIRED INTERCOM ...............................................22
AUXILIARY AUDIO CONNECTION.................................................................................23
POWER CONNECTION.......................................................................................................23
DUMMY LOAD....................................................................................................................23
TR-300 SET-UP.............................................................................................................................24
HEADSET CONNECTION ..................................................................................................24
DYNAMIC/ELECTRET MIC SWITCH ..............................................................................24
BATTERY INSTALLATION ................................................................................................25
-i-
TABLE OF CONTENTS (CONT.)
PRE-WALK-THRU CHECKLIST ................................................................................................26
SYSTEM OPERATION ..................................................................................................................27
BTR-300 OPERATION .................................................................................................................27
POWER..................................................................................................................................27
LOCAL HEADSET VOLUME.............................................................................................27
PUSH TO TALK/LOCK TO TALK SWITCH......................................................................27
TR-300 OPERATION....................................................................................................................28
POWER..................................................................................................................................28
BATTERY CHECK ...............................................................................................................28
HEADSET VOLUME ...........................................................................................................28
PUSH TO TALK/PUSH TO TRANSMIT SWITCH ............................................................28
BATTERY REMOVAL .........................................................................................................29
ENABLING AUDIO .....................................................................................................................30
PORTABLES .........................................................................................................................30
WIRED INTERCOM.............................................................................................................30
AUXILIARY..........................................................................................................................30
SETTING SYSTEM GAIN LEVELS ...........................................................................................31
ADJUSTING GAIN...............................................................................................................31
BTR-200 BASE STATION....................................................................................................31
TR-200 PORTABLE ..............................................................................................................31
INTERCOM GAIN................................................................................................................32
AUXILIARY GAIN...............................................................................................................32
SYSTEM WALK-THRU .................................................................................................................33
TROUBLE SHOOTING .................................................................................................................34
BATTERY INFORMATION ..........................................................................................................35
GENERAL.....................................................................................................................................35
BC-4 BATTERY CHARGER ........................................................................................................35
RECOMMENDED HEADSETS ....................................................................................................36
ACCESSORIES ...............................................................................................................................38
WARRANTY SERVICE INFORMATION...................................................................................40
FCC INFORMATION.....................................................................................................................41
-ii-
INTRODUCTION
GENERAL DESCRIPTION
This manual covers the BTR-300 Base Station
and the TR-300 Portable Transceiver.
At the BTR-300 op er a tor’s com mand, the
remotes may communicate with each other,
with a wired intercom system or with an auxiliary system. The BTR-300 Base Station with
its one transmit and four receive channels is
designed to operate in full duplex (simultaneous two-way communications) with up to
four TR-300 Belt Pack transceivers. See block
diagram in Figure 1.
The Telex Models BTR-300 and TR-300 were
specifically designed to provide the user with a
highly flexible wireless two-way communication system with the capability of interface
with a wired intercom system and other auxiliary audio.
Figure 1
Block Diagram of System
-1-
The system operates on selected frequencies
within the150-216 MHz band.
The TR-300 Transceiver operates in the continuous transmit mode with the audio activated by
a switch. As many as four TR-300 belt-pack
transceivers can operate in a fully duplex network with one Telex Model BTR-300 Base
Station.
The BTR-300 system is fully compatible with a
number of other wired intercom manufacturers
units. See the BTR-300 Setup Section for additional information.
The TR-300P Trans ceiver op er ates in the
Push-to-transmit mode (the transmit and talk
function are activated together). Any number
of TR-300P transceivers can be used in a
half-duplex network with one BTR-300 Base
Station. Operate only one TR-300P at a time.
Attempting to use two transmitters simultaneously on the same channel will cause interference.
-2-
BTR-300 BASE STATION TRANSCEIVER
TECHNICAL INFORMATION
SPECIFICATIONS BTR-300
Overall
Input Power....................................................................... 13.0 VAC RMS/600 mA with supplied adaptor
or filtered 12 to 14 VDC/600 mA source.
Intercom Output .........50 mV (Low) or 330 mV (Hi) RMS into 300 ohm load typical (at rated deviation)
Intercom Input (Gain Minimum)............................................. 300 mV RMS typical (for rated deviation)
Auxiliary Output ...........................................430 mV RMS into 600 ohm load typical (at rated deviation)
Auxiliary Input (Gain Maximum) ............................................. 60 mV RMS typical (for rated deviation)
Local Headset Input ........................................................................................... 2 mV RMS input nominal
1.5 mV RMS input at compression (Dynamic)
Local Headset Output ................................................................. 32 mW maximum output into 600 ohmst
Temperature Range .......................................................................................-4°F to 130°F (-20°C to 55°C)
Dimensions....................................................................................................15.75" W x 1.75" H x 10.5" D
(40 cm x 4.5 cm x 26 cm)
Weight.......................................................................................................................................4.5 lbs (2 kg)
Transmit
RF Frequency Range............................................................................................................. 150-216 MHz
RF Frequency Stability .................................................................................... Crystal Controlled, 0.005%
RF Power Output ................................................................................................................ 50 mW Typical
Modulation................................................................................................................ FM, 3 KHz deviation.
115 micro-seconds Pre-emphasis
Trasmit Antenna........................................................................................................... 5/8-wave (supplied)
SO239 connector on chassis
Modulation Limiter .......................................................................................................Internal Compressor
Modulation Frequency Range ...................................................................................300 to 5000 Hz ±2 dB
Radiated Harmonics and Spurious Emissions.................................................................................-45 dBC,
Exceeds FCC Specifications
FCC ................................................................................................ Type Accepted Under Parts 90 and 74
-3-
SPECIFICATIONS BTR-300 (CONT.)
Receive
RF Frequency Range...............................................................................................................150-216 MHz
RF Frequency Stability ......................................................................................Crystal Controlled, 0.005%
Type .................................................................................................Dual Conversion superheterodyne, FM
RF Sensitivity...................................................................................... Less than 0.5 µV for 12 dB SINAD
IF Selectivity............................................................................. 3 dB at 30 kHz (4 pole Monolythic Filter)
Image Rejection ................................................................................................................... 65 dB or better
Squelch Quieting ..................................................................................................................................90 dB
Squelch Threshold ............................................................................................................ 1.0 µV (Internal)
Signal-to-Noise Ratio...........................................................................................................................90 dB
Receive Antenna.......................................................................................................... 5/8-wave (supplied)
SO239 connector on chassis
Distortion ..................................................................................................... Less than 1% at Rated Output
FEATURES
• Intercom connections with the ability to in-
The Telex Model BTR-300 is a Base Station
with one transmitter and four receivers. It is designed for portable two way communication
with the capability for interface to other audio
systems. Features include:
terface with most wired intercom systems.
• RF LED indicator for each portable station.
• An extremely flexible unit that
has the capability to communicate at one time with
any number of the available portable stations (up to four) or wired stations (intercom and/or other audio source).
• All metal case for superior shielding.
• Table or rack mountable.
• Powered by an external AC supply via the
power jack on the rear of the unit. It can
also be powered by any filtered 12 to 14
VDC/600 mA source or 13.0 VAC RMS
600 mA source.
-4-
CONTROLS and CONNECTIONS
FRONT PANEL ( Refer to Figure 3)
Mic On-Push-to-Talk/Lock-to-Talk Switch:
Enables the local headset microphone audio
function.
Power ON/OFF Switch:Push this switch once
to turn power ON; push it again to turn the
power OFF.
NOTE: DOES NOT control base station RF
transmit.
Power ON Indicator: The Power ON Indicator is illuminated when the Power ON/OFF
Switch is pushed in the ON Position.
Local Push-to-Talk Indicator: Will be illuminated whenever the talk function is on.
Local Headset Connector: 4 Pin XLR Connector for Input/Output. The headset jack will
accept many Telex model headsets. Compatible
with other intercom headsets with four pin
XLR connectors that are wired as shown in
Figure 2.
Lo cal Mi cro phone Gain Con trol and
Overmodulation Indicator: A screwdriver
adjustable control is provided to control the input level of the local headset mic. This input is
protected from overloads by means of a gain
compressor whose operation is signaled by the
gain LED indicator.
Portable Enable Switches and Indicators:
When in the “IN” position, the Enable switches
allow the user of the corresponding portable
unit to be heard by others connected to the system. When in the “OUT” position, the respective portable will be muted, but this portable
will still be able to hear all other selected
remotes and interfaces. The indicators normally show the presence of a portable transceiver in use on the channel corresponding to
that indicator.
Figure 2
Headset XLR Connector Wiring
Local Headset Volume: Ad justs vol ume to
Local Headset.DOES NOT AFFECT
MI CRO PHONE GAIN.
-5-
Head set Mi cro phone Se lect Switch:This
switch al lows the user to se lect ei ther an
Electret or Dynamic microphone.
External Intercom Switch, Level Control,
and Indicator: This switch enables the wired
intercom interface when “IN”, and disables it
when “OUT”. For RTS intercoms, the “IN” position is channel A and the “OUT” position is
channel B. A screwdriver adjustable control is
provided to control the input level of the wired
intercom.
Intercom Connectors: Connections to interface the BTR-300 with a wired intercom system.
Auxiliary Output/Input Connectors: Can be
used for 2-way (four wire) input and output to
the BTR-300 or as a simplex input or output.
Typical uses are 4 wire low level intercom’s,
tape recorders, public address inputs or outputs, or when operating two BTR-300 units simultaneously.
Auxiliary Audio Enable Switch, Level Control, and Indicator: The switch enables and
disables the Auxiliary interface when “IN” and
“OUT”, respectively. The function of the level
control here is the same as that described for
the intercom.
REAR PANEL (Refer to Figure 4)
Power Jack: For external AC supply adaptor
(supplied) or any filtered 12 to 14 VDC/600
mA source, or 13.0 VAC RMS/600 mA source.
Transmit and Receive Antenna Connectors:
Attach 5/8-wave antennas (supplied) to these
connectors. Antenna color should match the
“color dot.”
Speaker Jack: Allows the user to connect an
external speaker (8 ohms minimum) to the unit.
Transmit Switch: Slide switch that allows the
operator to select one of three transmit modes.
In the “OFF” position, the transmitter is always
off. This mode may be used if the base is functioning solely as a monitor. In the “CONT” posi tion, the trans mit ter is al ways on. This
continuous mode is recommended over the
“REMOTE” mode. In the “REMOTE” position, the transmitter is enabled only when one
or more portables are active.
Speaker Gain Control: Screwdriver adjustable. Adjust the gain control clockwise to increase speaker gain or counterclockwise to
decrease speaker gain.
NOTE: Leave setting counterclockwise if no
speaker is attached.
-6-
-7-
-8-
TR-300 BELT-PACK TRANSCEIVER
TECHNICAL INFORMATION
SPECIFICATIONS TR-300
Overall
Power Requirements ................................................................... 6 AA cells (Alkaline, NEDA, MN 1500)
Nickel-Metal Hydride Optional
Current Drain ........................................................................................................................ typical 65 mA
Temperature Range ..................................................................................... -4oF to 130oF (-20oC to 55oC)
Dimensions .................................................................................................... 4.25" W x 4.125" H x 2.0" D
(108mm x 105mm x 51mm)
Weight................................................................................................................ 13oz (369g) with batteries
Transmit Antenna................................................................................................. 1/4-wave wire (attached)
Receive Antenna .................................................................................................. 1/4-wave wire (attached)
Transmit
RF Frequency Range ............................................................................................................. 150-216 MHz
RF Frequency Stability .................................................................................... Crystal Controlled, 0.005%
RF Power Output ................................................................................................................ 50 mW Typical
Modulation ............................................................................................................ FM, 5000 Hz deviation,
115 micro-seconds Pre-emphasis
Modulation Limiter ..................................................................................................... Internal Compressor
Modulation Frequency Range ............................................................................... 300 to 5000 Hz +/-2dB
Microphone Audio Input................................................................................................... 30 to 3500 ohms
Microphone Input Sensitivity ..................................................................... 2 mV Dynamic, 4 mV Electret
Radiated Harmonics and Spurious Emissions............................................................................... -45 dBC,
Exceeds FCC Specifications
FCC ................................................................................................ Type Accepted Under Parts 90 and 74
Receive
RF Frequency Range ............................................................................................................. 150-216 MHz
RF Frequency Stabiltiy ............................................................................ Crystal Controlled, 0.005%Type
Dual Conversion Superheterodyne, FM
RF Sensitivity...................................................................................... Less than 0.5 µV for 12 dB SINAD
IF Selectivity............................................................................................. 3 dB at 30 kHz (Ceramic Filter)
Image Rejection ................................................................................................................... 70 dB or better
Squelch Quieting ..................................................................................................................................90 dB
Squelch Threshold ............................................................................................................. 3.0µV (Internal)
Signal-to-Noise Ratio...........................................................................................................................90 dB
Audio Output ........................................................................................... 32 mW into 600 ohms (Headset)
Distortion ..................................................................................................... Less than 1% at Rated Output
-9-
FEATURES
• Push-to-Talk
• Lightweight, small size and is self-contained.
with Lock-to-Talk feature
switch for the TR-300 and Push-to-Transmit
with Lock-to-Transmit fea ture for the
TR-300P.
•2
separate antennas, one for transmit, the
other for receive.
CONTROLS AND CONNECTIONS
EXTERNAL CONTROLS (Refer to Figure 6)
Headset Jack: A four pin XLR connector for
Input/Output. The headset jack will accept
many different Telex model headsets. Compatible with other intercom headsets with four pin
XLR connectors that are wired as shown in
Figure 5.
Volume OFF/ON Control: This thumbwheel
control serves as both an off/on switch and as a
volume control.
Low Battery and Overmodulation
Indicator LED:
Low Battery Indicator: Part of the battery
check circuit. When the power switch is
placed in the “ON” position the LED will
flash one time if the battery is good. A poor
battery will cause the LED to illuminate continuously and a bad or unusable battery will
not cause any illumination at all.
Charge Jack: Allows nickle-metal hydride
batteries to be charged without removing them
from the unit.
Overmodulation Indicator: Uses the same
LED as the low battery indicator. During the
talk mode, if the microphone gain is too
high, the LED will illuminate when talking.
Push-To-Talk/Lock-To-TalkSwitch: For
Model TR-300, this switch enables the talk
function. For Model TR-300P, this switch enables the transmit and audio function and otherwise operates as described for BTR-300.
Talk LED Indicator: (Labeled “talk”) Will be
illuminated whenever the talk function on the
TR-300 or transmit function on the TR-300P is
enabled.
Figure 5
Headset XLR Connector Wiring
-10-
Figure 6
External Controls, TR-300
-11-
Figure 7
Internal Controls, TR-300
INTERNAL CONTROLS (Refer To Figure 7)
Microphone Gain Control: Screwdriver adjustable by removing belt clip and prying out
the small rubber plug to the right of the screw
boss.
Dynamic/Electret Switch:This switch allows
selection of “D”when using a Dynamic Microphone or "E" when using an Electret Microphone.
Battery Compartment: Holds 6 AA batteries
in a removable battery holder (supplied).
-12-
EQUIPMENT SET-UP
UNPACKING
Unpack your BTR-300 and TR-300 System. If
there are any damages or shortages, refer to the
“Warranty Service Information" section in this
manual.
ANTENNA INFORMATION
ANTENNA CONNECTIONS
To insure that the frequency range of the antennas match the receiver and transmitter of the
BTR-300, match the color band on the antenna
with the color dot on the BTR-300.
The BTR-300 is supplied with two (2) antennas. One 5/8-wave antenna for Transmit and
one 5/8-wave for Receive.
Assemble the 5/8-wave antenna by screwing
the two sections together as shown in Figure 8.
Both sections of the BTR-300 5/8-wave antennas must be used. Leaving off the top section
will result in reduced distance capability.
Attach the antennas to the antenna input receptacles. Tighten the connector securely.
Figure 8
5/8-wave Antenna Assembly
Figure 9
Attaching 5/8-wave Antenna
-13-
ANTENNA POLARIZATION
The Telex Wireless Intercom System is “Vertically Polarized". This means both the transmitting and receiving antennas should operate in
the vertical position.
Figure 11
Proper Dressing of the Antennas
Figure 10
Vertically Polarized Antennas
Keep the distance between the base (BTR-300)
and the belt packs (TR-300) antennas as short
as possible. The greater the distance, the
weaker the sig nal. How ever, the portables
should be a minimum distance of 10 feet from
the base station and each other for best performance.
The antennas can be remoted for better signal
path. A Telex coax assembly is required. See
“Accessory” section for order information.
NOTE: If your BTR-300 transceiver is to be
located in a shielded rack mount enclosure or
other poor RF location, you must remote the
5/8-wave antennas with coax assemblies.
Make sure the “signal paths” be tween the
BTR-300 and remotes are unobstructed. You
should always be able to visibly locate the antennas for best performance.
ANTENNA PLACEMENT
Proper antenna placement probably has the
most effect on your TELEX Wireless Intercom
System’s overall performance. The following
suggestions will result in opti mum per formance.
Proper placement of the TR-300 can be critical.
The trailing antennas should “dangle” freely.
“Wadding” the antennas up and placing them
in a pocket, etc., will reduce system distance.
It is suggested that the unit be worn on the belt
or pocket with both antenna’s hung vertically
for best operating range and performance.
Figure 12
Keeping Site Clear to Antenna
-14-
Attempting to operate the wireless intercom
system through or around walls, ceilings, metal
objects, etc. will reduce system range and performance.
SIGNAL REFLECTION OFF A METAL OBSTRUCTION
CAUSES REDUCED SIGNAL AND “MULTIPATH”
DO NOT- mount the BTR-300 5/8-wave antennas next to metal such as beams, walls with
metal studs, equipment racks, etc. This also
applies to the antennas when assembled directly to the BTR-300. This will “detune” the
receiving antenna which can result in noise or
loss of RF signal at the BTR-300. See Figure
14.
IM PROVING RE CEP TION AND
INCREASING RANGE
Keeping the distance from the base (BTR-300)
and the belt packs (TR-300) as short , and unobstructed as possible will produce the most reliable performance.
Figure 13
Operating System Near Obstructions
1. Placing the unit in an
equip ment rack and
remoting the antennas
is GOOD.
The BTR-300 is supplied with two antennas.
This should provide satisfactory system performance in most applications. System range can
be enhanced by remoting the 5/8-wave receive
antenna using the available accessories.
2. Placing the unit ontop of
a shelf or equip ment
rack unobstructed without remoting the antenna is GOOD.
Figure 14
BTR-300 Antenna Placement
-15-
3. Placing the unit in an
equipment rack with the
an ten nas mounted on
the BTR-300 or the side
of the rack is BAD.
BTR-300 SET-UP
LOCATION
Locate the BTR-300 transceiver on a level surface with the rear of the unit facing you. See
“Antenna Information” section for more information on choosing a location.
To change the switch positions you will need to
remove the cover on the BTR-300. Remove
three #6-32 x 3/8" screws on both sides of the
unit. Remove four #4-40 x 3/16" screws on the
top front and loosen three #4-40 x 3/16" screws
on the back of the unit. The cover will lift off.
INTERNAL INTERCOM SWITCHES
Intercom Dip Switch: Located in the inside of
the unit is a DIP Switch. This switch will have
to be set for the wired intercom unit you will
be using. The switch is factory set for interfacing with Telex Audiocom wired intercom
units. See Table 1 if you will be using an RTS
or Clearcom wired intercom system.
Ref er ence Fig ure 15 for switch po si tions.
Change the switch positions as indicated in the
chart depending on the wired intercom system
you will be using. After setting this switch, set
the High/Low switch as shown in the next section and then replace cover and secure with the
hardware previously removed.
SWITCH POSITION
Telex Audiocom
ON
ON
OFF
ON
OFF
ON
OFF
OFF
ON
RTS
OFF
OFF
ON
OFF
ON
OFF
ON
ON
OFF
Clearcom
ON
OFF
ON
ON
OFF
OFF
OFF
ON
ON
Table 1
Dip Switch Positions For Wired Intercom Terminations
Figure 15
Dip Switch
-16-
High/ Low Switch: Along with setting the DIP
switch inside the unit to correspond to the
wired intercom you have selected to use, you
must also set the “High/Low” switch. This
switch is also located inside the BTR-300 as
shown in Figure 16.
Switch
Setting
For the correct setting corresponding to your
wired intercom unit see Table 2. The switch is
factory set for use with Telex AudioCom or
RTS wired intercoms.
Telex
AudioCom
High
RTS
High
Clearcom
Low
Table 2
Figure 16
Location of High/Low Switch
-17-
RACK MOUNTING
To rack mount the BTR-300 base transceiver
do the following:
Place the rack mount brackets (supplied) on either side of the unit and insert three #6-32 x
3/8" screws for each bracket. Tighten the
screws securely.
Insert the BTR-300 into your 19" rack enclosure and insert four (4) #10-32 x 3/8" Phillips
pan head screws (supplied) in each corner of
the rack mount brackets and secure to your enclosure.
Remove the front two #6-32 x 3/8" screws on
each side of the transceiver as shown in Figure
17.
Figure 17
Attaching Brackets For Rack Mounting
-18-
Remoting Antennas: It will be necessary to
remote both the transmit and receive antennas
on the BTR-300 when it is rack mounted.
You will also need to remote the transmit antenna in the same manner. Connect a coax cable as s e m b l y to the trans m i t a n t e n n a
receptacle. Remote the 5/8-wave antenna, by
attaching the antenna to one of the brackets
(not supplied).
Connect the coax cable assembly (not supplied), to the back of the receive antenna receptacle and remote the 5/8-wave antenna. The
antenna can be attached to either a wall mount
bracket or a microphone stand bracket (not
supplied). See “Accessory” section for order
information.
Figure 18
Remoting Antennas when Rack Mounted
-19-
LOCAL HEADSET CONNECTION
Insert the headset/microphone into the 4 pin
XLR connector on the front panel. See the microphone connection diagram (Figure 2) if
other than a Telex Headset is used.
H E A D S E T MI C R O P H O N E SE L E C T
SWITCH
If the headset you are using has an Electret microphone, the local microphone select switch
must be in the “ELT” position (Electret). This
switch is located on the rear panel. A +5 volt
bias is available at the microphone plug for
electret use.
Figure 19
Connecting Headset to the BTR-300
If you are using a headset with a dynamic microphone, place the local microphone select
switch in the “DYN” position (Dynamic).
Headset Mic
NOTE: FOR PROPER OPERATION YOU
MUST MATCH THE TYPE OF MI CROPHONE YOU ARE USING WITH THE DYNAMIC/ELECTRET SWITCH LO CATED
ON THE REAR OF THE UNIT.
Dyn
Elt
TRANSMIT SWITCH
Allows the operator to select three different
types of transmitting modes; continuous transmitter, transmitter off, or remote transmitter.
For most op er a tions, place the trans mit ter
switch in the “CONT” position (Continuous
mode).
Figure 20
Headset Microphone Select Switch
Transmit
In the Continuous mode the transmitter will
be on at all times regardless of whether the
portables are on or not.
In the Remote mode, the only time the base
can transmit is when a portable unit is turned
on.
In the Off mode the BTR-300 base station
will not transmit to the remote belt-packs.
This mode might be used if the base is to be
a monitor station only.
Figure 21
Transmit Switch
-20-
INTERCONNECTION to a HARD-WIRED
INTERCOM SYSTEM
Connect the intercom cable to the back of the
BTR-300. There are two intercom connections
on the back of the unit, one being a male connector, the other a female connector, connected
in parallel with each other. Either works as an
input or output.
The RADIOCOM wireless system can be integrated into Telex intercom systems and most
existing wired intercom systems including RTS
and Clearcom.
Figure 22
Typical Interface to Wired System
-21-
Figure 23
Connecting Two BTR-300’s
CONNECTING AUXILIARY AUDIO SYSTEM
DUMMY LOAD
Connect the BTR-300 to your auxiliary audio
via the Auxiliary input/output receptacles on
the rear of the unit.
In the case where a wired intercom will not be
used with the BTR-300, it is important that the
dummy load (sup plied) be in stalled. The
dummy load should be plugged into the “Intercom Loop-Thru” connector.
CONNECTING TWO BTR-300’S
Con nect the first BTR-300 to the sec ond
BTR-300 by using a short XLR type cable (not
supplied) plugged into either of the intercom
jacks. See Figure 23.
NOTE: If the dummy load is not used properly, an annoying squeal may result that may
cause damage to the ears.
Note that the stations need to be on different
frequencies.
POWER CONNECTION
Insure the Power ON/OFF Switch on the front
of the BTR-300 is in the “OFF” position. Connect the AC power supply cord to the BTR at
the socket labeled “POWER”. Plug the power
supply unit into an AC outlet.
Figure 24
Connecting the Power Supply
-22-
TR-300 SET-UP
HEADSET CONNECTION
BATTERY INSTALLATION
Insert the headset/microphone into the connector on the bottom of the unit. See the connection diagram (Figure 5) if headsets other than
Telex are used.
Insure that the OFF/ON Volume control knob
is turned OFF. Access the battery compartment
by removing the belt clip on the back of the
unit. Release the 1/4 turn fastener located on
the back of the belt clip and re move belt
clip/cover.
Remove the battery holder from the box. Insert
six (6) AA batteries in the holder, paying close
attention to polarities of the batteries.It may be
necessary to turn the batteries with the thumb
and forefinger the first few times the batteries
are inserted into the battery holder to insure
good positive contact. Insert the holder into the
case and replace the belt clip/battery cover and
engage the 1/4 turn fastener.
Figure 25
Connecting Headset
DYNAMIC/ELECTRET SWITCH
If the headset you are using has an Electret microphone, the dynamic/electret switch must be
in the “E” position. This switch is accessible by
removing the belt clip and removing the battery
holder. A +5 volt bias is available at the microphone plug for electret use.
If you are using a headset with a dynamic microphone, place the dynamic/electret switch in
the “D” position.
NOTE: for proper operation you must match
the type of microphone you are using with the
dynamic/electret switch located inside the battery compartment.
Figure 27
Battery Installation
Figure 26
Dynamic/Electret Switch
-23-
PRE-WALK-THRU CHECKLIST
Following the instructions fully to this point,
you have successfully completed the following
checklist:
Set transmit switch on BTR-300.
Connected headsets to BTR-300 and
all TR-300’s.
Set internal intercom switch to correspond with the wired intercom.
Connected the BTR-300 to any auxiliary audio, intercom or external
speaker.
Located the BTR-300 transceiver
properly.
Installed batteries in the TR-300 Remote Transceiver.
Connected power to BTR-300 transceiver.
If you missed any of the above instructions, go
back and complete that instruction before going on.
Connected the antennas to the
BTR-300 with matched color codes.
Set Dynamic/Electret switches in both
BTR-300 and TR-300
-24-
SYSTEM OPERATION
BTR-300 OPERATION
PUSH TO
SWITCH
POWER
If you have followed the instructions until this
point, you should now be ready to turn both the
TR-300 and the BTR-300 “ON”.
TALK/LOCK-TO-TALK
To enable the talk function on the BTR-300,
press and hold down on the talk button and begin talking. Releasing the talk button will discon tinue t h e m i cro phone au d i o . For
continuous talk, quickly press the talk button
twice. This enables the talk function as long as
you want. To release the talk function press the
talk button once more and the talk function will
cease.
Place the power switch on the BTR-300 in the
“ON” position.The red power on indicator
LED should illuminate.
NOTE: The talk LED will be illuminated
whenever the talk function is activated.
Figure 28
Power ON/OFF - Volume Control Knob
LOCAL HEADSET VOLUME
Adjust the volume control on the BTR-300 by
rotating the Volume control either clockwise or
counterclockwise as required for comfortable
listening volume.
Figure 30
Push-to-Talk/Lock-to-Talk Switch
Figure 29
Volume Control-BTR-300
-25-
TR-300 OPERATION
POWER
PUSH TO TALK/PUSH TO TRANSMIT
You should now be ready to turn the TR-300
“ON”. Rotate the OFF/ON Volume Control
Switch on the TR-300 clockwise to turn the
unit on.
To enable the talk func tion on the Model
TR-300 press and hold down on the talk button
and begin talking. Releasingthe talk button will
discontinue the microphone audio. For continuous talk, quickly press the talk button twice.
This locks on the talk function. To release the
talk function press the talk button once. Note
that the TR-300 transmits any time that the
power is on.
BATTERY CHECK
As you turn the unit on, note that the battery
LED (labeled bat/ovmod) should flash one
time on good batteries. Low batteries will
cause the LED to be illuminated continuously
and a bad battery will not cause any illumination at all.
For the Model TR-300P, the switch enables
both the transmit and audio functions and otherwise operates as described for the TR-300.
NOTE:The talk LED will be il lu mi nated
whenever the talk function is activated.
Figure 31
Low Battery andOvermodulation
Indicator LED
HEADSET VOLUME
After batteries have been checked, adjust the
volume control by rotating the control as required for comfortable listening volume.
Figure 33
Push-to-Talk/Lock-to-Talk Switch
Figure 32
Power ON/OFF - Volume Control-TR-300
-26-
BATTERY REMOVAL
NOTE: Rechargeable batteries can be charged
right in the TR-300 using the Telex AC-1NM
Battery Charger. Refer to “Battery Information” Section. Rechargeable batteries in the
holder can be charged us ing the Telex
BC-4NM charger.
To remove the battery holder from the case to
change batteries, follow the instructions as before for removing the cover. Pull the strap on
the holder, the holder should come out.
NOTE: For maximum uninterrupted service it
is suggested that new 1.5 volt alkaline AA batteries be installed prior to each use. Avoid
“shelf worn” or “economical” batteries. Operation from nickle metal hydride batteries is also
permissible. Typical life of fresh alkaline batteries with the TR-300 is approximately 24
hours maximum, 12-15 hours is typical of fully
charged nickle-metal hydride batteries.
Figure 34
Battery Removal
ENABLING AUDIO
PORTABLE TRANSCEIVERS
Select the TR-300 portables that will be used
with the BTR-300. Push in the portable enable
switches that correspond to the frequencies of
the TR-300 remotes that you will be using. The
frequencies of the portable stations 1,2,3, and
4, are listed on the bottom of the BTR-300. The
Portable Carrier LED will illuminate when the
remote on that frequency is turned on. The indicators may also light in response to outside
i n t e r f e r e n c e on that chan nel o r t o
intermodulation arising from portables being
used at too close a distance to the base. To prevent these sources from creating undesirable
noise, all unused channels should be switched
out.
When using a RTS system wired intercom the
switch will act as a channel selector switch for
selecting of either Channel A or Channel B.
AUXILIARY
The AUX Switch on the front of the BTR-300
will enable any auxiliary audio that is used.
Figure 35
Enable Switches
INTERCOM SWITCH
The intercom switch in the front of the unit will
act as an enabling switch when the unit is being
used with either a Telex Audiocom wired intercom or Clearcom wired intercom.
-27-
SETTING SYSTEM GAIN LEVELS
ADJUSTING GAIN
BTR-300 BASE STATION
The gain may need to be adjusted for various
audio conditions. The overmodulation LED
will indicate when the gain is too high. If the
LED is illuminated when you are talking, the
gain is too high and will need to be decreased.
If the LED does not flash at all, and the audio
is low, the gain may need to be increased. An
occasional flash of the overmodulation indicator is fine.
The microphone overmodulation indicator for
the BTR-300 headset can be found on the right
side of the front panel. The microphone gain
control potentiometer is located to the left of
the indicator.
TR-300 PORTABLE
The overmodulation circuitry in the TR-300
uses the same LED as the low battery circuitry.
If modulation is too high this LED will illuminate when talking.
Using a plastic screwdriver (supplied), adjust
the control clockwise to increase the gain or
counterclockwise to decrease the gain. Note
that the gain can also be adjusted by changing
the spacing between the microphone and your
mouth.
If the gain needs to be adjusted, remove the
belt clip on the rear of the unit and pry out the
small rubber plug to the right of the screw
boss. This will reveal the microphone gain control potentiometer. Once adjusted, replace the
rubber plug.
Figure 37
Adjusting Microphone Gain -TR-300
Figure 36
Adjusting Microphone Gain -BTR-300
-28-
INTERCOM GAIN
AUXILIARY GAIN
If the audio volume at the intercom input is too
high, the LED will be illuminated when the
person on the intercom is talking. Decrease the
gain until the LED does not illuminate while
talking at normal volume. Occasional flashing
of the LED is allowable. See Figure 38.
If the audio volume at the auxiliary input, is
too high, the Aux LED will be illuminated
when the person on the auxiliary is talking. Decrease the auxiliary gain until the auxiliary
LED does not illuminate while talking at normal volume. Occasional flashing of the auxiliary LED is allowable. The auxiliary indicator
has three states: OFF, HALF BRIGHT, AND
FULL BRIGHT. When the switch is “OUT”,
theindicator is OFF. When the switch is “IN” it
becomes HALF BRIGHT, and when the input
is overmodulated it becomes FULL BRIGHT.
Figure 38
Auxiliary Gain Controls
SYSTEM WALK-THRU
The “system walk-thru” can detect problems of
weak signal strength caused by:
Now that you have successfully “set up” your
TELEX Wireless Intercom System and turned
on any auxiliary equipment you are ready to
test the overall performance by “Walking”
theTELEX system through the areas in which
you will be using it.
•
Poor antenna location
•
Wrong antenna for receiver and/or transmitter.
•
RF “Trouble Spots”
•
Operating distance beyond system capability.
TR-300 Battery Check.
•
Old or used batteries in the TR-300
Set microphone gain in both the
TR-300 and the BTR-300.
Under normal conditions the portable carrier
indicator LEDs on the BTR-300 should always
be lit when portables are transmitting. “Weak
Signal” conditions will result in flashing of the
Carrier LED.
Before you begin your walk-thru check the following:
Check the push-to-talk switch is engaged in the Lock-to-talk position.
LED will be illuminated.
In 99% of all instances you will set up your
TELEX Wire lessIn ter com Sys tem, walk it
through and achieve error-free performance. If
in the rare instance your TELEX System does
not “pass” during your walk-thru evaluation,
refer to the last section of this manual which
deals with System Troubleshooting.
Portable units to be used are enabled
at the Base.
-29-
TROUBLESHOOTING
Reread the sections of this manual to make
sure you have completed system set-up properly
If you are unable to solve the problem, contact
the dealer from whom you purchased the system for assistance.
PROBLEM
SOLUTION
DISTORTION - Sys tem’s audio quality
seems distorted at medium to high input levels.
Reduce microphone gain by adjusting microphone gain control.
HISS - System seems to produce a “hiss”
which is undesirable.
Check the gain setting on all beltpacks and
the base. They may be too low.
LOW OUTPUT - System produces a low
output level.
Check the gain setting on both the beltpacks
and the base. They may be too low.
FEEDBACK - Moving around area of use
produces “squeal” or “howl” in various locations using ext. speakers.
Re duce the gain set tings on both the
beltpacks and the base. They may be too
high.
DROPOUTS - When moving around the
area of use there seems to be locations where
the signal “swooshes” or completely disappears.
.Make sure both antennas on the base are
connected and follow the location suggestions. Change the location of the base unit
and antennas or avoid the bad areas with the
remote beltpacks
INTERFERENCE - System picks up signals other than wireless Intercoms.
Make sure Telex TR-300 beltpack is turned
on - this will usually eliminate the interfering
signal. If not using a beltpack, make sure the
corresponding enable switch at the base is
disengaged.
If problems persist with the TR-300 beltpack
on, you will probably need to have your system’s frequency changed to another channel.
NO AUDIO from BASE or BELTPACK
headsets.
Check Trans mit ter switch on base, use
CONT or RE MOTE po si tion. Check
push-to-talk function - is the switch ON?
-30-
BATTERY INFORMATION
GENERAL
Alkaline Batteries: Alkaline batteries such as
Mallory’s DURACELL or Everready’s ENERGIZER provide the most reliable operation in
wireless transceivers. The use of low cost carbon-zinc batteries is NOT recommended.
Improper battery selection, use, installation,
and care are the cause of numerous wireless
system failures.
AC-1NM BATTERY CHARGER
NOTE: The AC-1NM is not supplied with the
TR-300. See the “Accessory” section for ordering information.
The AC-1NM will charge the batteries in two
TR-300’s simultaneously. Insert the plug from
the charger into the jack on the side of the
TR-300 and plug the charger into a 110 volt
outlet.
CAUTION
DO NOT AT TEMPT TO CHARGE
ANY ALKALINE BATTERIES WITH
THIS CHARGER.
Full charge of the battery pack is obtained after
12 to 16 hours. A full charge will last 8 to 10
hours with ni-cads and 12-15 hours with nickle
metal hydrides.
Extensive over-charging may damage or destroy the batteries. Please ensure the charging
time does not exceed 16 hours.
Figure 39
AC-1 NM Battery Charger
ENERGIZER® is a registered trademark of Union Carbide Corporation.
DURACELL® is a registered trademark of Duracell Inc.
-31-
BC-4 NM BATTERY CHARGER
NOTE: The BC-4 NM is not supplied with the
TR-300. See “Accessory” Section for ordering
information.
Full charge of the battery pack is obtained after
12 to 16 hours. A full charge will last 8 to 10
hours with ni-cads and 12 to 15 hours with
nickle-metal hydrides.
Remove the battery holder from the TR-300.
Extensive over-charging may damage or destroy the batteries. Please ensure the charging
time dores not exceed 16 hours.
CAUTION
DO NOT AT TEMPT TO CHARGE
ANY ALKALINE BATTERIES WITH
THIS CHARGER.
Snap the terminal connector onto the battery
holder and plug the charger into a 110 Volt outlet.
Figure 40
BC-4 NM Battery Charger
-32-
ACCESSORIES
Microphone Stand/SurfaceMount Bracket For 5/8-wave antenna.
Includes necessary hardware.
AC-1NM Battery Charger Order No.70741-001
Includes 6 nickle-metal hydride batteries and 1
carrier. Charges 1 or 2 TR-300’s without removing the battery pack.
Order No.
25’ Coax Cable
Order No. 63901-000
BC-4NM Battery Charger
Order No. 70741-002
Includes 6 nickle-metal hydride batteries and 1
carrier. Charges 1 set of batteries outside of the
TR-300.
4’ Coax Cable
Order No. 63901-001
5/8-Wave Antenna Screw apart for easy storing.
Order No.
879248-1
879248-2
879248-3
879248-4
Color
Code
Blue
Yellow
White
Red
NMBP Battery Pack
Order No. 70741-003
6 nickle-metal hydride batteries and carrier.
For use with AC-1NM and BC-4NM
Frequency
Range
150-168.9 MHz
169-184.9 MHz
185-199.9 MHz
200-216 MHz
Telex Configuration
Order No.
PH-4..............70340-100
PH-8..............70415-100
HR-1 ............300534-007
HR-2 ............300534-000
AC Power Supply 12 Volt, 60 HZ
Order No. 730131-000
RTS Configuration
Order No.
PH-4R ............70340-102
PH-8R ............70415-102
HR-1R ...........300534-008
HR-2R ...........300534-001
-33-
CUSTOMER SERVICE INFORMATION
If your receiver or transmitter should need servicing under the warranty, please contact:
Customer Service Department
TELEX COMMUNICATIONS, INC.
8601 East Cornhusker Highway,
P.O. Box 5579,
Lincoln, Nebraska 68505-5579 U.S.A.
Phone: (402) 467-5321 or 465-7021
All claims of defect or shortage should be sent to the above address. When returning
items for service, you must provide date and proof of purchase, such as a copy of the
sales receipt, to establish warranty. A letter should be included outlining all symptoms
and claimed defects. Information on how the equipment was installed and used is very
helpful. Please include your phone number and return address in case our service technicians need to contact you.
Units that have been modified cannot be accepted for repair.
Include all information requested by the Service Department. Then pack the unit as follows:
Check the unit to see that all parts and screws are in place. Then wrap it in heavy paper or
put it in a plastic bag. If the original carton is not available, place the unit in a strong carton that is at least six inches bigger in all three dimensions than the unit. Fill the carton
equally around the unit with resilient packing material (shredded paper, foam, etc.). Seal
it with gummed paper tape, tie it with a strong cord, and ship it by prepaid express,
United Parcel Service or insured parcel post to the Telex Service Department.
It is very important that the shipment be well-packed and fully insured. Damage claims
must be settled between you and the carrier and this can delay repair and return of the
unit to you.
Telex reserves the right to make changes in design and improvement on its product without assuming any obligation to install the same on any of its products previously manufactured. Further Telex reserves the right to ship new and/or improved products which are
similar to the form, fit and function of products originally ordered.
-34-
FCC INFORMATION
The Telex Models BTR-300 and TR-300 transceivers are Type
Accepted under United States Federal Communications
Commission Parts 90 and 74. Licensing of Telex equipment is
the user’s responsibility and licensability depends upon the user’s
classification, user’s application, and frequency selected. Telex
strongly urges the user to contact the appropriate
telecommunications authority for any desired clarification.
CAUTION: Changes or modifications made by the user could
void the user’s authority to operate the equipment.
-35-
9600 Aldrich Ave. So., Minneapolis, Minnesota, 55420 U.S.A.
PN 80
Oct. 1999
Made in U.S.A

Source Exif Data:
File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.2
Linearized                      : No
Creator                         : tr300.vp
Create Date                     : Tuesday, November 16, 1999 9:20:29 AM
Title                           : tr300.PDF
Author                          : Unknown
Producer                        : Acrobat PDFWriter 3.02 for Windows
Subject                         : 
Modify Date                     : 1999:11:16 09:28:54
Page Count                      : 40
EXIF Metadata provided by EXIF.tools
FCC ID Filing: B5DM511

Navigation menu