Telex RadioCom BTR-200 II, BTR-200B II, RadioCom TR-200, RadioCom TR-200P, RadioCom BTR-200B II Operating Instructions Manual

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Telex

Operating Instructions

Headset

Power

Ext Intercom Aux Audio

RadioCom

Portable Stations CarrierStatus

Portable Station Connect

Headset

Controls

Volume

BTR-200 II

Mic On Push Twice to Latch

PROFESSIONAL WIRELESS INTERCOM SYSTEM TR-200, TR-200P, BTR-200 II, BTR-200B II

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TABLE OF CONTENTS

INTRODUCTION..............................................................................................................................1

GENERAL DESCRIPTION............................................................................................................1

TR-200 BASE STATION TRANSCEIVER.....................................................................................3

TECHNICAL INFORMATION ......................................................................................................3

SPECIFICATIONS ..................................................................................................................3

FEATURES..............................................................................................................................4

CONTROLS AND CONNECTIONS..............................................................................................5

FRONT PANEL.......................................................................................................................5

REAR PANEL .........................................................................................................................6

TR-200 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-200 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-200 SET-UP.............................................................................................................................24

HEADSET CONNECTION ..................................................................................................24

DYNAMIC/ELECTRET MIC SWITCH ..............................................................................24

BATTERY INSTALLATION ................................................................................................25

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TABLE OF CONTENTS (CONT.)

PRE-WALK-THRU CHECKLIST ................................................................................................26

SYSTEM OPERATION ..................................................................................................................27

BTR-200 OPERATION .................................................................................................................27

POWER..................................................................................................................................27

LOCAL HEADSET VOLUME.............................................................................................27

PUSH TO TALK/LOCK TO TALK SWITCH......................................................................27

TR-200 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

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INTRODUCTION

GENERAL DESCRIPTION

This manual covers the BTR-200, BTR-200II, and the BTR-200B II Base Stations and the TR-200 and TR-200P Portable Transceivers (referenced as BTR-200 and TR-200 unless otherwise specified.)

The Telex Models BTR-200 and TR-200 were specifically designed to provide the user with a highly flexible wireless two-way communica tion system with the capability of interface with a wired intercom system and other auxil iary audio.

ANT

HEADSET

MICROPHONE

TR-200

TRANSMITTER

RF CARRIER

ANT

SIGNAL

At the BTR-200 operator’s command, the remotes may communicate with each other, with a wired intercom system or with an auxil iary system. The BTR-200 Base Station with its one transmit and four receive channels was designed to operate in full duplex (simulta neous two-way communications) with up to four TR-200 Belt Pack transceivers (one trans mit and one receive channel) See block dia gram in figure 1.

WIRED

INTERCOM

ANT

BTR- 200

HEADSET

ANT

RECEIVER

REC1REC2REC3REC

EARPHONE

RECEIVER

R CARRIER

SIGNAL

TRANSMITTER

AUXILIARY

INPUT

Figure 1

Block Diagram of System

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AUXILIARY

OUTPUT

MICROPHONE

The system operates on selected frequencies within the 150-216 MHz band.

The BTR-200 system is fully compatible with a number of other wired intercom manufactur ers units. See the BTR-200 Setup Section for additional information.

The Telex Model’s TR-200 and TR-200P Belt-pack Transceivers, are designed with one

transmit and one receive channel.

The TR-200 Transceiver operates in the con tinuous transmit mode with the audio, to talk,

activated by a switch. As many as four TR-200 belt-pack transceivers can operate in a fully

duplex network with one Telex Model

BTR-200 or BTR-200 II Base Station.

The TR-200P Transceiver operates in the Push-to-transmit mode (the transmit and talk function are activated together). Any number of TR-200P transceivers can be used in a half-duplex network with one BTR-200 or BTR-200 II Base Station. Operate only one transmitter at a time. Attempting to use two transmitters simultaneously on the same chan nel will cause interference.

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BTR-200 BASE STATION TRANSCEIVER

TECHNICAL INFORMATION

SPECIFICATIONS BTR-200

Input Power ........................................................................13.0 VAC RMS/300 mA with supplied adaptor

or filtered 12 to 14 VDC/300 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 mV 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

Transmit 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

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SPECIFICATIONS BTR-200 (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

FCC .....................................................................................................................Notification Under Part 15

FEATURES

Intercom connections with the ability to in-

The Telex Model BTR-200 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 sta tions (up to four) or wired stations (inter com and/or other audio source).

Powered by an external AC wall supply (supplied), via the power jack on the rear of the unit. It can also be powered by any filtered 12 to 14 VDC/300 mA source or

13.0 VAC RMS 300 mA source.

All metal case for superior shielding.

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Molded front panel for aesthetic appeal along with functionability .

Table or single height rack mountable.

CONTROLS and CONNECTIONS

FRONT PANEL ( Refer to Figure 3)

Power ON/OFF Switch: Push this switch

once toturn power ON; push it again to turn the power OFF.

Power ON Indicator: The Power ON Indica tor is illuminated when the Power ON/OFF Switch is pushed in the ON Position. It re mains illuminated while the Transceiver ison.

Local Headset Connector: 4 Pin XLR Con nector for Input/Output. The headset jack will accept 6 different Telex Model Headsets. See “Recommended Headset” Section in back of manual for more information. Compatible with other intercom headsets with four pin XLR connectors that are wired as shown in Figure 2.

MALE CONNECTORS

BTR-200/TR-200

MICROPHONE SHIELD (-)

HEADPHONE BALANCED AUDIO OUT

MICROPHONE AUDIO (+)

Mic On-Push-to-Talk/Lock-to-Talk Switch:

Enables the local headset microphone audio function.

NOTE: DOES NOT control base station RF

transmit.

Local Push-to-Talk Indicator: Will be illumi

nated whenever the talk function is on.

Local Microphone Gain Control and

Overmodulation Indicator: A screwdriver

adjustable control is provided to control the in put level of the local headset mic. This input is protected from overloads by means of a gain compressor whoseoperation 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 correspond ing to that indicator.

Figure 2

Headset XLR Connector Wiring

Local Headset Volume: Adjusts volume to

Local Headset. DOES NOT AFFECT MICRO PHONE GAIN.

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Ext Intercom Switch, Level Control, and In dicator: This switch enables the wired inter

com interface when “IN”, and disables it when “OUT”. For RTS intercoms, the “IN” position is channel A and the “OUT” position is chan nel B. A screwdriver adjustable control is pro vided to control the input level of the wired intercom.

Auxiliary Audio Enable Switch, Level Con trol, 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)

Transmit Antenna Connector: Connect

5/8-wave antenna (supplied) to this connector. Antenna color should match connector dot on BTR-200.

Receive Antenna Connector: Connect 5/8-wave antenna (supplied) to this connector. Antenna color should match connector dot on BTR-200. See “Antenna Information” section for assembly information.

Headset Microphone Select Switch: This

switch allows the user to select either an

Electret or Dynamic microphone. This switch is factory preset to DYN Position.

NOTE: All Telex headsets that are used with

this intercom are dynamic type microphones.

Intercom Connectors: Connections to inter face the BTR-200 with a wired intercom sys

tem.

Auxiliary Output/Input Connectors: Can be used for 2-way (four wire) input and output to the BTR-200 or as a simplex input or output. Typical uses are 4 wire low level intercom’s, tape recorders, public address inputs or out puts, or when operating two BTR-200 units simultaneously.

Power Jack: For external AC wall supply adaptor (supplied) or any filtered 12 to 14 VDC/300 mA source, or 13.0 VAC RMS/300 mA source.

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 if func tioning solely as a monitor. In the “CONT” po sition, the transmitter is always on. This continuous mode is recommended over the “REMOTE” mode. In the “REMOTE” posi tion, the transmitter is enabled only when one or more portables are active.

Speaker Gain Control: Screwdriver adjust able. Adjust the gain control clockwise to in crease speaker gain or counterclockwise to

decrease speaker gain.

NOTE: Leave setting counterclockwise if no speaker is attached.

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BTR-200 II

LOCAL HEADSET VOLUME

INDICATOR

LOCAL MIC

OVERMODULATION

Mic On Push Twice to Latch

Headset

Controls

Volume

LOCAL MIC GAIN CONTROL

LOCAL PUSH-TO-TALK INDICATOR

MIC ON PUSH-TO-TALK/

LOCK-TO-TALK SWITCH

PORTABLE CARRIER INDICATORS

AUXILIARY ENABLE

INTERCOM

INDICATOR

POWER ON

INDICATOR

Portable Stations Carrier Status

Aux Audio

Portable Station Connect

ENABLE SWITCHES TO RECEIVE

PORTABLE TRANSMITTERS

Figure 3

INDICATOR

Ext Intercom

Front Panel BTR-200

AUXILIARY LEVEL CONTROL

AUXILIARY ENABLE SWITCH

INTERCOM LEVEL CONTROL

INTERCOM ENABLE SWITCH

Power

Headset

POWER ON-OFF SWITCH

LOCAL HEADSET CONNECTOR

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RECEIVE

Receive Antenna

INTERCOM CONNECTORS

ANTENNA CONNECTOR

TELEX COMMUNICATIONS, INC.

FCC I.D. B5DBTR-200 MADE IN U.S.A..

Intercom

PUSH

Intercom

Power

Loop-Thru

Input

Transmit

Gain

Jack

300 mA

AC/DC 13.O.V.

Speaker

Remote

Off

Cont

Elt

MIN.)

POWER JACK

SPEAKER GAIN CONTROL

SPEAKER / LOCAL MONITOR ( 8

Figure 4

Rear Panel BTR-200

TRANSMITTER SWITCH

AUXILIARY OUTPUT CONNECTOR

AUXILIARY INPUT CONNECTOR

Auxiliary

PUSH

Transmit Antenna

Audio Input

Headset Mic

Auxiliary

Dyn

Audio Output

TRANSMIT ANTENNA

CONNECTOR

-8-

HEADSET MIC SELECT SWITCH

TR-200 BELT-PACK TRANSCEIVER

TECHNICAL INFORMATION

SPECIFICATIONS TR-200

Overall

Power Requirements ......................................................................6AA cells (Alkaline, NEDA, MN 1500)

Nickel Cadmium Optional

Current Drain ..........................................................................................................................typical 65 mA

Temperature Range .......................................................................................-4°F to 130°F (-20°C to 55°C)

Dimensions......................................................................................................4.25” W x 4.125” H x 2.0” D

(108mm x 105mm x 51 mm)

Weight.................................................................................................................13 oz (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 +/_2 dB

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

RF Frequency Range...............................................................................................................150-216 MHz

RF Frequency Stability.............................................................................Crystal Controlled, 0.005% Type

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 ..............................................................................................................3.0 µV (Internal)

Signal-to-Noise Ratio...........................................................................................................................90 dB

Audio Output .............................................................................................32 mW into 600 ohms (Headset)

Distortion .......................................................................................................Less than 1% at Rated Output

FCC .....................................................................................................................Notification Under Part 15

Receive

Dual Conversion Superheterodyne, FM

-9-

FEATURES

Lightweight, small size and is

self-contained.

2 separate antennas, one for transmit, the

other for receive.

CONTROLS AND CONNECTIONS

Push-to-Talk with Lock-to-Talk feature

switch for the TR-200 and Push-to-Transmit with Lock-to-Transmit feature for the TR-200P.

EXTERNAL CONTROLS (Refer To Figure 6)

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 Indicatorœ: 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.

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-Talk Switch: For Model TR-200, this switch enables the talk function. For Model TR-200P, this switch en ables the transmit and audio function and oth erwise operates as described for TR-200.

Headset Jack: A four pin XLR connector for Input/Output. The headset jack will accept six different Telex Model Headsets. See “Recom mended Headset” Section for more informa tion. Compatible with other intercom headsets with four pin XLR connectors that are wired as shown in Figure 5.

MALE CONNECTORS

BTR-200/TR-200

MICROPHONE SHIELD (-)

MICROPHONE AUDIO (+)

HEADPHONE BALANCED AUDIO OUT

Talk LED Indicator: (Labeled “talk”) Will be illuminated whenever the talk function on the TR-200 or transmit function on the TR-200P is enabled.

Figure 5

Headset XLR Connector Wiring

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LOW BATTERY / OVERMODULATION INDICATOR LED

TALK LED INDICATOR

PUSH-TO-TALK/ LOCK-TO-TALK SWITCH

bat/

ovmod

BELT CLIP

HEADSET JACK

talk

VOLUME OFF/ON CONTROL

RECEIVE ANTENNA

TRANSMIT ANTENNA

Figure 6

External Controls, TR-200

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DYNAMIC / ELECTRET

ACCESS TO MICROPHONE

SWITCH

FCC ID: B5DTR200 S/N: P/N:70681-

BATTERY COMPARTMENT

MADE IN U.S.A.

MIC

GAIN CONTROL

INTERNAL CONTROLS (Refer To Figure 7)

Belt Clip: Combination Belt Clip/Battery

Cover. Access to Battery Compartment, Micro phone Gain Control and Dynamic/Electret

Switch is accomplished by removal of belt clip via a quick release 1/4 turn fastener.

Microphone Gain Control: Screwdriver ad justable by removing belt clip and prying out the small rubber plug to the right of the screw boss.

Figure 7

Internal Controls, TR-200

Dynamic/Electret Switch: This switch allows selection of “D” when using a Dynamic Micro phone or "E" when using an Electret Micro

phone.

NOTE: All Telex headsets that are used with this intercom are dynamic microphones. Unit is shipped in the “D” position.

Battery Compartment: Holds 6 AA batteries in a removable battery holder (supplied).

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EQUIPMENT SET-UP

UNPACKING

Unpack your BTR-200 and TR-200 System. If there are any damages or shortages, refer to the “Warranty Service Information" section in this manual.

ANTENNA INFORMATION

ANTENNA CONNECTIONS

The BTR-200 is supplied with two (2) anten nas. One 5/8-wave antenna for Transmit and one 5/8-wave for Receive.

To insure that the frequency range of the anten

nas match the receiver and transmitter of the

BTR-200, match the color code on the antenna with the color code on the BTR-200.

Assemble the 5/8-wave antenna by screwing the three sections into one another as shown in

Figure 8. All three sections of the BTR-200 5/8-wave antennas must be used. Leaving out a

section will result in reduced distance capability.

DO DON’T

Attach the receive 5/8-wave antenna to the antenna input receptacle labeled “Receive Antenna” on the right side of the rear panel via the supplied connectors. Attaching the angled connector to the base station receptacle first, then attaching the straight connector, as shown in Figure 9, will prevent antenna sway.

Figure 8

5/8-wave Antenna Assembly

Figure 9

Attaching 5/8-wave Antenna

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Attach the transmit 5/8-wave antenna to the antenna input receptacle labeled “Transmit An tenna” on the left side of the rear panel. The antenna should be vertically aligned.

DISTANCE BETWEEN ANTENNAS

The distance between the BTR-200 Receive

and Transmit antennas is not adjustable when the antennas are connected directly on the back of the unit.

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-200 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.

Figure 10

Transmit Antenna Receptacle

ANTENNA POLARIZATION

The Telex Wireless Intercom System is “Vertically Polarized". This means both the transmit- ting and receiving antennas should operate in the vertical position.

Headset

E L E

Power

PortableStations Carrier Status

ExtIntercom Aux Audio

PortableStationConnect

BTR-200II

Headset Controls

Volume

MicOn PushTwiceto Latch

Figure 11

Vertically Polarized Antennas

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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 optimum perfor mance.

Proper placement of the TR-200 can be criti cal. The trailing antennas should “dangle” freely. “Wadding” the antennas up and placing the TR-200 in a pocket, etc., will reduce sys tem 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.

Keep the distance between the base (BTR-200) and the belt packs (TR-200) antennas as short as possible. The greater the distance, the weaker the signal. However, the portables

should be a minimum distance of 10 feet from

the base station and each other for best perfor mance.

X E

L E T

700 FEET

Headset

PortableStations CarrierStatus

ExtIntercom AuxAudio

E L E T

PortableStationConnect

Power

X E

L E T

100 FEET

BTR-200II

Headset Controls

Volume

MicOnPush Twice to Latch

AS DISTANCE INCREASES, SIGNAL STRENGTH

DECREASES

Figure 13

Distance Between BTR-200 and TR-200

Figure 12

Proper Dressing of the Antennas

Make sure the “signal paths” between the BTR-200 and remotes are unobstructed. You should always be able to visibly locate the an tennas at all times, for best performance.

X E

L E T

Headset

X E L

E T

SIGNAL REACHES ANTENNA AT FULL STRENGTH WITH NO OBSTRUCTIONS

PortableStations CarrierStatus

ExtIntercom AuxAudio

X E L E

Power

PortableStationConnect

Volume

Figure 14

Keeping Site Clear to Antenna

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BTR-200II

Headset Controls

MicOn Push Twice to Latch

Attempting to operate the wireless intercom system through or around walls, ceilings, metal objects, etc. will reduce system range and per formance.

DO NOT - mount the BTR-200 5/8-wave an tennas on, or next to, metal such as beams,

walls with metal studs, equipment racks, etc. This also applies to the antennas when assem bled directly to the BTR-200. This will “de tune” the receiving antenna which can result in noise or loss of RF signal at the BTR-200. See Figure 16.

Headset

PortableStations CarrierStatus

ExtIntercom AuxAudio

E L E T

Power

BTR-200II

Headset Controls

PortableStationConnect

Volume

MicOn Push Twice to Latch

SIGNAL REFLECTION OFF A METAL OBSTRUCTION CAUSES REDUCED SIGNAL AND “MULTIPATH”

Figure 15

Operating System Near Obstructions

1. Placing the unit on top of a

2. Placing the unit on top of a

shelf or equipment rack and remoting the receive antenna is OK.

IMPROVING RECEPTION AND IN CREASING RANGE

X E

L E T

Keeping the distance from the base (BTR-200) and the belt packs (TR-200) as short , and un

obstructed as possible will produce the most reliable performance.

The BTR-200 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.

shelf or equipment rack unobstructed without remoting the receive antenna is OK.

3. Placing the unit on top of

a shelf or equipment rack and mounting the remoted receive antenna on the side of the shelf or equipment rack is BAD.

3-BAD

Headset

PortableStations CarrierStatus

ExtIntercom AuxAudio

E L E T

Power

Headset Controls

PortableStationConnect

Volume

MicOn Push Twice to Latch

BTR-200II

Headset

Power

PortableStations CarrierStatus

ExtIntercom AuxAudio

E L E T

BTR-200II

Headset Controls

PortableStationConnect

Volume

MicOn Push Twice to Latch

Headset

Power

PortableStations CarrierStatus

ExtIntercom AuxAudio

X E L E T

PortableStationConnect

BTR-200II

Headset Controls

Volume

MicOn Push Twice to Latch

Figure 16

Receive Antenna Placement

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BTR-200 SET-UP

LOCATION

Locate the BTR-200 transceiver on a level sur face with the rear of the unit facing you. See “Antenna Information” section for more infor mation on choosing a location.

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 interfac ing with Telex Audiocom wired intercom units. See Table 1 if you will be using an RTS or Clearcom wired intercom system.

SWITCH POSITION

123456789

Telex Audiocom ON ON OFF ON OFF ON OFF OFF ON

To change the switch positions you will need

to remove the cover on the BTR-200. 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 slide off.

Reference Figure 17 for switch positions. 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 sec tion and then replace cover and secure with the hardware previously removed.

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

FRONT

Figure 17

Dip Switch

-17-

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-200 as shown in Figure 18.

Switch See

Setting Detail

Telex AudioCom High A

RTS High A

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.

SEE DETAIL A AND B

LOW

HIGH

Clearcom Low B

Table 2

HIGH

LOW

Detail A

High Setting

FRONT

HIGH

Figure 18

Location of High/Low Switch

-18-

LOW

Detail B

Low Setting

RACK MOUNTING

Install BTR-200 in Rack Enclosure: To rack mount the BTR-200 base transceiver do the following:

Place the rack mount brackets (supplied) on ei ther side of the unit and insert three #6-32 x 3/8" screws for each bracket. Tighten the screws securely.

Remove the two #6-32 x 3/8" screws on each side of the transceiver as shown in Figure 19.

Insert the BTR-200 into your 19" rack enclo sure 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 en closure.

REMOVE SCREWS (TYPICAL BOTH SIDES)

Attaching Brackets For Rack Mounting

#6-32X3/8

Figure 19

-19-

Remoting Antennas: It will be necessary to remote both the transmit and receive antennas on the BTR-200 when it is rack mounted.

Connect the coax cable assembly (not sup plied), to the back of the receive antenna re ceptacle 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.

You will also need to remote the transmit an tenna in the same manner. Connect a coax ca ble assembly to the transmit antenna receptacle. Remote the 5/8-wave antenna, by attaching the antenna to one of the brackets

(not supplied).

Headset

E L E T

Power

ExtIntercom Aux Audio

PortableStations Carrier Status

PortableStationConnect

BTR-200II

Headset Controls

Volume

MicOn PushTwiceto Latch

Remoting Antennas When Rack Mounted

Figure 20

-20-

LOCAL HEADSET CONNECTION

Insert the headset/microphone into the 4 pin XLR connector on the front panel. See the mi crophone connection diagram (Figure 2) if other than a Telex Headset is used.

HEADSET MICROPHONE SELECT SWITCH

If the headset you are using has an Electret mi crophone, 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.

TO HEADSET OR HANDSET

L E

Figure 21

Connecting Headset to the BTR-200

Headset Mic

If you are using a headset with a dynamic mi crophone, place the local microphone select switch in the “DYN” position (Dynamic).

NOTE: FOR PROPER OPERATION YOU MUST MATCH THE TYPE OF MICRO-

PHONE YOU ARE USING WITH THE DYNAMIC/ELECTRET SWITCH LOCATED

ON THE REAR OF THE UNIT.

TRANSMIT SWITCH

Allows the operator to select three different types of transmitting modes; continuous trans mitter, transmitter off, or remote transmitter. For most operations, place the transmitter switch in the “CONT” position (Continuous mode).

In the Continuous mode the transmitter therefore will be on at all times regardless of

whether the portables are on or not.

Dyn

Elt

Figure 22

Headset Microphone Select Switch

Transmit

Cont

Off

Remote

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-200 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 23

Transmit Switch

-21-

INTERCONNECTION TO A HARD-WIRED INTERCOM SYSTEM

The RADIOCOM wireless system can be inte grated into Telex intercom systems and most existing wired intercom systems including RTS and Clearcom.

EXTERNAL SPEAKER

Connect the intercom cable to the back of the

BTR-200. There are two intercom connections

on the back of the unit, one being a male con nector, the other a female connector, connected in parallel with each other. Either works as an input or output.

BINAURAL BELTPACK

LOCAL MONITOR

BELTPACK

Headset

E L E

Power

INTERCOM

ExtIntercom Aux Audio

PortableStations Carrier Status

PortableStation Connect

IN OUT

AUX

BTR-200 II

Headset Controls

Volume

BTR-200

MicOn PushTwiceto Latch

PA SYSTEM

ANOTHER BTR 200 OR OTHER AUDIO INPUT

TR-200 TR-200

X E L

E T

E L E

TR-200

X E L

E T

TR-200

X E L

Figure 24

Typical Interface to Wired System

-22-

PUSH

XXXX

PUSH

I/C

PUSH

XXXX

Figure 25

Connecting Two BTR-200 Together

CONNECTING AUXILIARY AUDIO SYSTEM

Connect the BTR-200 to your auxiliary audio via the Auxiliary input/output receptacles on the rear of the unit or when two BTR-200 are used as a system.

Connect the first BTR-200 to the second BTR-200 by using two short male to female XLR type cables (not supplied). See Figure 25.

Note that the stations need to be on different frequencies.

POWER CONNECTION

PUSH

I/C

DUMMY LOAD

In the case where a wired intercom will not be used with the BTR-200, it is important that the dummy load (supplied) be installed. The dummy load should be plugged into the “Intercom Loop-Thru” connector.

NOTE: If this is not set up properly, an annoy ing squeal may result that may cause damage to the ears.

POWER

AC/DC 13 OV 300mA

BTR 200

Insure the Power ON/OFF Switch on the front of the BTR-200 is in the “OFF” position. Con nect the supplied AC power supply cord to the receiver at the socket labeled “POWER”. Con nect the power supply unit to an AC outlet sup plying 105 to 125 VAC, 60 Hz.

-23-

TO AC OUTLET

Figure 26

Connecting the Power Supply

TR-200 SET-UP

HEADSET CONNECTION

Insert the headset/microphone into the connec tor on the bottom of the unit. See the headset connection diagram (Figure 5) if unit other than Telex is used.

TO HEADSET

DYNAMIC/ELECTRET SWITCH

If the headset you are using has an Electret mi

crophone, the dynamic/electret switch must be in the “E” position (Electret). This switch is accessible by removing the belt clip and re moving 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 mi crophone, place the dynamic/electret switch in the “D” position (Dynamic).

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

Connecting Headset

FCC ID: B5DTR200 S/N: P/N:70681-

ELECTRET DYNAMIC

MADE IN U.S.A.

MIC

Figure 28

Dynamic/Electret Switch

-24-

BATTERY INSTALLATION

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 remove belt clip/cover.

REMOVE BELT CLIP

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 29

Battery Installation

-25-

PRE-WALK-THRU CHECKLIST

Following the instructions fully to this point you have successfully competed the following checklist:

Set internal intercom switch to cor respond with the wired intercom.

Located the BTR-200 transceiver properly.

Connected power to BTR-200 trans ceiver.

Connected the 1/4-wave and 5/8-wave antenna to the BTR-200. Check frequency range of the antenna matching the frequency of the BTR-200 by correctly matching color codes.

Set Dynamic/Electret switches in both BTR-200 and TR-200

Set transmit switch on BTR-200.

If you missed any of the above instructions, go back and complete that instruction before going on.

Connected headsets to BTR-200 and all TR-200’s

Connected the BTR-200 to any auxiliary audio, intercom or exter nal speaker.

Installed batteries in the TR-200 Remote Transceiver.

-26-

SYSTEM OPERATION

BTR-200 OPERATION

POWER

If you have followed the instructions until this point, you should now be ready to turn both the TR-200 and the BTR-200 “ON”.

Place the power switch on the BTR-200 in the “ON” position. The red power on indicator LED should illuminate.

OFF

Figure 30

Power ON/OFF - Volume Control Knob

LOCAL HEADSET VOLUME

Adjust the volume control on the BTR-200 by rotating theVolume control either clockwise or counterclockwise as required for comfortable listening volume.

INCREASES VOLUME

Volume

LOCAL HEADSET VOLUME

Figure 31

Volume Control - BTR-200

PUSH TO TALK/LOCK-TO-TALK SWITCH

To enable the talk function on the BTR-200, press and hold down on the talk button and begin talking. Releasing the talk button will discontinue the microphone audio. 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.

NOTE: The talk LED will be illuminated whenever the talk function is activated.

TALK LED

BTR-200 II

Mic On Push Twice to Latch

PUSH TO TALK LOCK TO TALK SWITCH

Figure 32

Push-to-Talk/Lock-to-Talk Switch

-27-

TR-200 OPERATION

POWER

You should now be ready to turn the TR-200 “ON”. Rotate the OFF/ON Volume Control Switch on the TR-200 counterclockwise to turn the unit on.

BATTERY CHECK

As you rotate the OFF/ON Volume Control knob clockwise to turn the unit on, note that the battery LED (labeled bat/ovmod) should flash one time on good batteries. Poor batteries will cause the LED to be illuminated continu ously and a bad or unusable battery will not cause any illumination at all.

bat/

talk

ovmod

PUSH TO TALK/PUSH TO TRANSMIT

To enable the talk function on the Model TR-200 press and hold down on the talk button and begin talking. Releasing the talk button will discontinue the microphone audio. For continuous talk, quickly press the talk button twice. This locks on the talk function. To re lease the talk function press the talk button once. Note that the TR-200 transmits any time that the power is on.

For the Model TR-200P, the switch enables both the transmit and audio functions and oth erwise operates as described for the TR-200.

NOTE: The talk LED will be illuminated whenever the talk function is activated.

Figure 33

Low Battery andOvermodulation

Indicator LED

HEADSET VOLUME

After batteries have been checked, adjust the volume control by rotating the control as re quired for comfortable listening volume.

ON/ INCREASES

VOLUME

ON / OFF SWITCH AND

VOLUME CONTROL

Figure 34

Power ON/OFF - Volume Control -TR-200

talk

PUSH-TO-TALK/LOCK-TO-TALK SWITCH

Figure 35

Push-to-Talk/Lock-to-Talk Switch

-28-

BATTERY REMOVAL

To remove the battery holder from the case to change batteries, follow the instructions as be fore for removing the cover. Pull the pull-bale strap on the holder, the holder should come out. Some models will not have the pull bale. If the pull bale is not present on the battery holder, turn the unit over with the battery holder facing downward. Give the case a slight shake into the palm of your hand, the holder should fall out.

REMOVE BELT CLIP

NOTE: For maximum uninterrupted service it is suggested that new 1.5 volt alkaline AA bat

teries (Mallory MN1500 or equivalent) be in

stalled prior to each use. Avoid “shelf worn” or “economical” batteries. Operation from heavy duty nickel-cadmium batteries is also permissi ble, at the expense of operating time. (NEDA 10015 or equivalent). Typical life of fresh alka line batteries with the TR-200 is approximately 24 hours maximum, 8-10 hours is typical of fully charged nickel-cadmium batteries.

NOTE: Nickel-cadmium batteries can be charged right in the holder using the Telex BC-4 Battery Charger. Refer to “Battery Infor mation” Section.

Figure 36

Battery Removal

-29-

PORTABLE TRANSCEIVERS

ENABLING AUDIO

Select the TR-200 portables that will be on line with the BTR-200. Push in the portable enable switches that correspond to the frequencies of the TR-200 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-200. The Portable Carrier LED will illuminate when the remote on that frequency is turned on. The indicators may also light in response to outside interference on that channel or to intermodulation arising from portables being used at too close a distance to the base. To pre vent these sources from creating undesirable noise, all unused channels should be switched out.

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.

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-200 will enable any auxiliary audio that will be used.

Ext Intercom Aux Audio

Enable Switches

Portable Stations Carrier Status

Portable Station Connect

Figure 37

-30-

SETTING SYSTEM GAIN LEVELS

ADJUSTING GAIN

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 indica tor is fine.

If the transmitted audio is too high or to low, the gain control potentiometer will need to be adjusted. Using a plastic screwdriver (sup plied), 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.

BTR-200 BASE STATION

The microphone overmodulation indicator for the BTR-200 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-200 PORTABLE

The overmodulation circuitry in the TR-200

uses the same LED as the low battery circuitry. If modulation is too high this LED will illumi nate when talking.

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.

INCREASE

TELEX

BTR-200 II

DECREASE

Mic On Push Twice to Latch

OVERMODULATION INDICATOR

REMOVE BELT CLIP

Figure 38

Adjusting Microphone Gain -BTR-200

INCREASE

DECREASE

GAIN

CAUTION

DO NOT remove this plug or attempt to adjust. This beltpack has been precisely tuned and any attempt to alter this adjustment will result in a non-operational unit.

REMOVE THIS RUBBER PLUG FOR ACCESS TO THE MICROPHONE GAIN CONTROL

Figure 39

Adjusting Microphone Gain -TR-200

-31-

INTERCOM GAIN

AUXILIARY GAIN

If the audio volume, at the intercom, 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.

OVERMOD INDICATORS

If the audio volume, at the auxiliary output, 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 nor mal volume. Occasional flashing of the auxil iary LED is allowable. The auxiliary indicator has three states: OFF, HALF BRIGHT, AND FULL BRIGHT. When the switch is “OUT”, the indicator is OFF. When the switch is “IN” it becomes HALF BRIGHT, and when the in put compressor operates it becomes FULL BRIGHT.

Ext Intercom Aux Audio

GAIN CONTROLS

Figure 40

Auxiliary Gain Controls

-32-

SYSTEM WALK-THRU

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” the TELEX system through the areas in which you will be using it.

Before you begin your walk-thru check the fol lowing:

TR-200 Battery Check.

Set microphone gain in both the TR200 and the BTR-200.

Check the push-to-talk switch is engaged in the Lock-to-talk position.

LED will be illuminated.

Only portable units to be used are enabled at the Base.

The “system walk-thru” can detect problems of weak signal strength caused by:

Under normal conditions the portable carrier indicator LEDs on the BTR-200 should always

be lit when portables are transmitting. “Weak Signal” conditions will result in flashing of the Carrier LED.

In 99% of all instances you will set up your TELEX Wireless Intercom System, 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.

Poor antenna location

Wrong antenna for receiver and/or trans mitter.

RF “Trouble Spots”

Operating distance beyond system capability.

Old or used batteries in the TR-200

-33-

TROUBLESHOOTING

Reread the sections of this manual to make sure you have completed system set-up properly

PROBLEM SOLUTION

DISTORTION - System’s audio quality

seems distorted at medium to high input lev els.

HISS - System seems to produce a “hiss” which is undesirable.

LOW OUTPUT - System produces a low output level.

FEEDBACK - Moving around area of use produces “squeal” or “howl” in various locations using ext. speakers.

DROPOUTS - When moving around the area of use there seems to be locations where the signal “swooshes” or completely disappears.

If you are unable to solve the problem, con tact the dealer from whom you purchased the system for assistance.

Reduce microphone gain by adjusting microphone gain control.

Check the gain setting on all beltpacks and the base. They may be too low.

Check the gain setting on both the beltpacks and the base. They may be too low.

Reduce the gain settings on both the beltpacks and the base. They may be too high.

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.

NO AUDIO from BASE or BELTPACK headsets.

Make sure Telex TR-200 beltpack is turned on - this will usually eliminate the interfer ing signal. If not using a beltpack, make sure the corresponding enable switch at the base is disengaged.

If problems persist with the TR-200 beltpack on, you will probably need to have your sys tem’s frequency changed to another channel.

Check Transmitter switch on base, use CONT or REMOTE position. Check push-to-talk function - is the switch ON.

-34-

BATTERY INFORMATION

GENERAL

Improper battery selection, use, installation and care are the cause of numerous wireless system failures.

Alkaline Batteries: Alkaline batteries such as Mallory’s DURACELL or Eveready’s ENER

GIZER provide the most reliable operation in wireless transceivers. The use of low cost car bon-zinc batteries is NOT recommended.

BC-4 BATTERY CHARGER

Remove the battery holder from the TR-200.

NOTE: The BC-4 is not supplied with the TR-200. See “Accessory” Section for ordering information.

CAUTION

DO NOT ATTEMPT TO CHARGE ANY ALKALINE BATTERIES WITH THIS CHARGER. THIS CHARGER IS TO BE USED WITH NICKEL CAD MIUM BATTERIES USED IN THE TR200 BATTERY HOLDER ONLY.

Nickel-Cadmium Batteries: These batteries can save you money in the long run, as they can be recharged, but they can also cause dis appointing wireless performance. Typical bat tery life is one fourth or less of the alkaline battery. If you want to use rechargeable

nickel-cadmium batteries you must select a heavy duty nickel-cadmium (NEDA 10015 or

equivalent)

Full charge of the battery pack is obtained after 14 to 16 hours. A full charge will last 8 to 10 hours.

Extensive over-charging may damage or destroy the batteries. Please ensure the charging time does not exceed 16 hours.

Snap the terminal connector onto the battery holder and plug the charger into a 110 Volt out let.

ENERGIZER® is a registered trademark of Union Carbide Corpora tion. DURACELL® is a registered trademark of Duracell Inc.

Figure 41

BC-4 Battery Charger

-35-

RECOMMENDED HEADSETS

V-Series

Catalog No. for V-200 Double sided headphone ...................................................... 300027-000

Catalog No. for V-210 Single sided headset with boom ............................................300027-001

Catalog No. for V-220 Double sided headset with boom...........................................300027-002

Earphone Frequency Response .............................................................................10 Hz - 20 kHz

Earphone Input Sensitivity ....................................................................................90dB @ 1 mW

Microphone Frequency Response

Dynamic (MB-11) ............................................................................... 50 Hz - 15 kHz

Electret (MB-12) ................................................................................. 20 Hz - 20 kHz

Microphone Input Sensitivity (re: 1 volt/mbar)

Dynamic (MB-11)...........................................................................................................-87 dB

Electret (B-12) ................................................................................................................-84 dB

Impedance

Earphones:..................................................................Mono 150 or 600

W; Stereo 75 or 300 W

Microphones ...................................................................................................................150 W

Size H-W-D..............................................................8" (203 mm) x 9" (228 mm) x 4" (102 mm)

Weight

V-200 double-sided headphone:........................................................... 14 ounces (396 grams)

V-210 single-sided headset: ...............................................................10.5 ounces (298 grams)

V-220 double-sided headset: ...............................................................15.5 ounces 439 grams)

PH-1

Catalog No....................................................................................................................64438-005

Earphone Type .....................................................................................................Dynamic/Single

Earphone Impedance ......................................................................................................150 ohms

Earphone Frequency Response ................................................................................50-15,000 Hz

Earphone Output ................................................................................................................105 dB

Microphone Type................................................................................Dynamic Noise Cancelling

Microphone Impedance..................................................................................................150 ohms

Microphone Frequency Response............................................................................100-8,000 Hz

Microphone Output ......................................................................-83 re: 1V/microbar (.071 mV)

Cable Length....................................................................................................6 ft. (1.8 m) coiled

Cable Connector.............................................................................................Female XLR-4 type

PH-2

Catalog No....................................................................................................................64437-006

Earphone Type .............................................................................................Dynamic/Dual/Mono