Telex BTR-300 manual

Telex Operating Instructions PROFESSIONAL WIRELESS INTERCOM SYSTEM TR-300, BTR-300 R Ext Intercom Aux Audio 1 3 4 2 Portable Station Connect BTR-300 Talk Headset Controls Volume Power Headset Portable Transmit On Gain O/M Push Twice to Latch RadioCom ä RadioCom ä TR-300[...]

TABLE OF CONTENTS INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 BTR-300 BASE STATION TRANSCEIVER . . . . . . . . . . . . . . . . . . . . . . [...]

INTRODUCTION GENERAL DESCRIPTION This manual covers the BTR-300 Base Station and the TR-300 Portable Transceiver. The RadioCom Models BTR-300 and TR-300 were specifically designed to provide the user with a highly flexible wireless two-way com- munication system with the capability to inter- face with a wired intercom system and other auxiliary aud[...]

The system operates on selected frequencies within the 150-216 MHz band. The BTR-300 system is fully compatible with a number of other wired intercom manufactur- ers units. See the BTR-300 Setup Section for additional information. The TR-300 Transceiver operates in the con- tinuous transmit mode with the audio acti - vated by a switch. As many as f[...]

BTR-300 BASE STATION TRANSCEIVER TECHNICAL INFORMATION -3- SPECIFICATIONS BTR-300 Input Power (minimum) ....................................................................................12V AC/DC at 360 mA Intercom Output ........330 mV (Low) or 1 V (Hi) RMS into 300 ohm load typical (at rated deviation) Intercom Input (Gain Minimum) ............[...]

FEATURES The RadioCom Model BTR-300 is a Base Station with one transmitter and four re - ceivers. It is designed for portable two way communication with the capability for inter- face to other audio systems. Features include: · An extremely flexible unit that has the capa- bility to communicate at one time with up to four portable stations and wir[...]

CONTROLS and CONNECTIONS FRONT PANEL (Refer to Figure 3) Power ON/OFF Switch: Push this switch once to turn power ON; push it again to turn the power OFF. Power ON Indicator: The Power ON light is illuminated when the Power ON/OFF Switch is pushed in the ON Position. Local Headset Connector: Four pin XLR Connector for Input/Output (plug for Telex u[...]

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 1 and the “OUT” position is channel 2. A screwdriver adjustable control is provided to control the input level of the wired intercom. Auxiliar[...]

-7- Ext Intercom Aux Audio 1 3 4 2 Portable Station Connect BTR-300 Tal k Headset Controls Volume Power Headset Portable Transmit On Gain O/M Push Twice to Latch RadioCom ä POWER ON INDICA TOR POWER ON-OFF SWITCH LOCAL HEADSET CONNECTOR LOCAL HEADSET VOLUME MIC ON PUSH-TO-T ALK/ LOCK-TO-T ALK SWITCH LOCAL PUSH-TO-T ALK INDICA TO R LOCAL MIC GAIN C[...]

-8- PUSH PUSH T ransmit Antenna Auxiliary Audio Output Auxiliary Audio Input Headset Mic Dyn Elt Off Remote Cont Loop Thru Intercom Intercom Loop-Thru Speaker Power AC/DC 12V 700 mA T ransmit AUXILIAR Y OUTPUT CONNECTOR AUXILIAR Y INPUT CONNECT OR INTERCOM CONNECT ORS Receive Antenna Intercom Loop-Thru RECEIVE ANTENNA CONNECTOR POWER JACK SPEAKER V[...]

TR-300 BELT-PACK TRANSCEIVER TECHNICAL INFORMATION -9- SPECIFICATIONS TR-300 Overall Power Requirements ..............................................................6 AA cells (Alkaline, NEDA, MN 1500) Nickel-metal hydride optional Current Drain .......................................................................................................[...]

FEATURES · Lightweight, small size and is self-contained. · 2 separate antennas, one for transmit, the other for receive. · Push-to-Talk with Lock-to-Talk feature switch for the TR-300 and Push-to-Transmit with Lock-to-Transmit feature for the TR-300P. CONTROLS AND CONNECTIONS EXTERNAL CONTROLS (Refer to Figure 6) Volume OFF/ON Control: This thu[...]

Figure 6 External Controls, TR-300 -11- Bat/ ovmod talk talk BEL T CLIP LOW BA TTER Y / OVERMODULA TION INDICA T OR LIGHT T ALK INDICA T OR LIGHT PUSH-TO-T ALK/ LOCK-TO-T ALK SWITCH VOLUME OFF/ON CONTROL HEADSET CONNECTOR TRANSMIT ANTENNA RECEIVE ANTENNA BA TTERY CHARGE JACK[...]

Figure 7 Internal controls, TR-300 INTERNAL CONTROLS (Refer to Figure 7) Microphone Gain Control: Screwdriver ad- justable 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 Mi- crophone or “E” when using and Electret Mi[...]

EQUIPMENT SET-UP BTR-300 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. INTERNAL INTERCOM SWITCHES The BTR-300 has internal switches that allow it to accommodate intercom systems other than what it was set to interface with when m[...]

Table 3 Pin Wiring for Rear Panel Jacks Figure 8 Internal Intercom Switches -14- Internal Auxiliary Audio Out Auxiliary Audio Input Intercom Loop Thru Switch (both jacks) Settings Pin 1 Pin 2 Pin 3 Pin1 Pin 2 Pin 3 Pin 1 Pin 2 Pin 3 T elex Audio Com Ground 600 ohm 600 ohm Ground 2.2K ohm 2.2K ohm Ground Balanced Balanced Balanced Balanced Balanced [...]

RACK MOUNTING To rack mount the BTR-300 base transceiver do the following: Remove the front two #6-32 x 3/8” screws on each side of the transceiver as shown in Figure 9. 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 [...]

ANTENNA INFORMATION ANTENNA CONNECTIONS The BTR-300 is supplied with two (2) anten- nas. One 5/8-wave antenna for Transmit and 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 10. Both sections of the BTR-300 5/8-wave an - tennas must be used. Leav[...]

Remoting Antennas: It will be necessary to remote both the transmit and receive antennas on the BTR-300 when it is rack mounted. Connect the coax cable assembly (not sup - plied), to the receive antenna receptacle and mount the 5/8-wave antenna. The antenna can be attached to either a wall mount bracket or a microphone stand bracket (not supplied).[...]

ANTENNA POLARIZATION The Telex Wireless Intercom System is “Ver- tically Polarized”. This means both the trans- mitting and receiving antennas should operate in the vertical position. Figure 13 Vertically Polarized Antennas ANTENNA PLACEMENT Proper antenna placement probably has the most effect on you TELEX Wireless intercom System’s overall [...]

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 MET AL OBSTRUCTION CAUSES REDUCED SIGNAL AND “MUL TIP A TH” Figure 16 Operating System Near Obstructions DO NOT - mount the BTR-300 5/8-wave an - tennas next to metal such as[...]

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 microphone, the local microphone select switch must be in the “ELT” positi[...]

INTERCONNECTION to a HARD-WIRED INTERCOM SYSTEM The RADIOCOM wireless system can be integrated into Telex intercom systems and most existing wired intercom systems includ- ing RTS and Clearcom. 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 con- nector, the other a[...]

Figure 22 Connecting Two BTR-300’s CONNECTING AUXILIARY AUDIO SYS - TEM Connect the BTR-300 to your auxiliary audio via the Auxiliary input/output receptacles on the rear of the unit. CONNECTING BTR-300’s Connect the first BTR-300 to other BTR-300s by using short XLR type cables (not supplied) plugged into either of the intercom jacks. See Figu[...]

TR-300 SET-UP HEADSET CONNECTION Inset the headset/microphone into the connec- tor on the bottom of the unit. See the connec- tion diagram (Figure 5) if headsets other than Telex are used. Figure 24 Connecting Headset DYNAMIC/ELECTRET SWITCH If the headset you are using has an electret mi- crophone, the dynamic/electret switch must be in the “E?[...]

PRE-WALK-THRU CHECKLIST Following the instructions fully to this point, you have successfully completed the follow- ing checklist: Set (if necessary) the internal inter- com switches to correspond with the wired intercom. Located the BTR-300 transceiver properly. Connected power to BTR-300 transceiver. Connected the antennas to the BTR-300 with mat[...]

SYSTEM OPERATION BTR-300 OPERATION 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”. Place the power switch on the BTR-300 in the “ON” position. The red power on indicator light should illuminate. Figure 27 Power ON/OFF - Volume Control Knob LOCAL HEADSET VOLU[...]

TR-300 OPERATION POWER 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. BATTERY CHECK As you turn the unit on, note that the battery light (labeled bat/ovmod) should flash one or more times with good batteries. Low batteries will cause the light to be illuminat[...]

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 TR-300 remotes that you will be using. The numbers of the portable stations (1, 2, 3, and 4), are the last digit of the product number on the back of the TR-300. The Portable Transmit On li[...]

SETTING SYSTEM GAIN LEVELS ADJUSTING GAIN The gain may need to be adjusted for various audio conditions. The overmodulation light will indicate when the gain is too high. If the light is illuminated when you are talking, the gain is too high and will need to be decreased. If the light does not flash at all, and the audio is low, the gain may need t[...]

INTERCOM GAIN If the audio volume at the intercom input is too high, the light will be illuminated when the person on the intercom is talking. De - crease the gain until the light does not illumi- nate while talking at normal volume. Occasional flashing of the light is allowable. See Figure 36. Figure 36 Auxiliary Gain controls AUXILIARY GAIN If th[...]

TROUBLESHOOTING Reread the sections of this manual to make sure you have completed system set-up prop- erly. If you are unable to solve the problem, con- tract the dealer from whom you purchased the system for assistance. -30- PROBLEM SOLUTION DISTORTION - System’s audio quality seems distorted at medium to high input levels. Reduce microphone ga[...]

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 Everready’s EN - ERGIZER provide the most reliable operation in wireless transceivers. The use of low cost carbon-zinc batteries is NOT recom[...]

BC-300NM2 BATTERY CHARGER NOTE: The BC-300NM2 is not supplied with the TR-300. See “Accessory” Section for or- dering information. Remove the battery holder from the TR-300. CAUTION DO NOT ATTEMPT 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. [...]

ACCESSORIES AB-300 Microphone Stand/Surface Mount Bracket - for 5/8-wave antenna. Includes necessary hardware. Order No. 63906-100 25’ Coax Cable Order No. 63901-000 4’ Coax Cable Order No. 63901-001 5/8-Wave Antenna - Screw apart for easy storing. Order No. Color Frequency Code Range 879248-1 Blue 150-168.9 MHz 879248-2 Yellow 169-184.9 MHz 87[...]

-34- 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 a[...]

-35- 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 [...]

R PN 803008-2 JAN 2001 Made in U.S.A TELEX COMMUNICATIONS, INC. 12000 Portland Ave. South, Bur nsville, MN 55337, U.S.A.[...]