Telex BTR-300 User's Manual
Contents
1. L3SQV3H 1V201 SHOLVOIQNI S3HOLIMS 1V2O1 J18VN3 3 18V LHOd uonejs 5 oipny xny OOO OO o qe 10d 9 13SQV3H 779301 HOLIMS 440 NO JospeaH cue Co YOLVOICNI NO 00 414 4 4894 p 178 1V201 I34MV3dS TOYNLNOD SINNIOA I3MV3dS HOLIMS 1231358 JIN L3SavaH LOG 310102 10d 30102 VNN3INV VNN3LINV HOLIMS YSLLINSNVYL vu 004 AZL OG OV 4ayeads nuy doo7 VSN Wa Aleyixny ni 10007 00 418 U102 9 U 5u YOLOANNOD YOLOSNNOD VNN3 INV YOLIANNOD 1 VNNALNV LINSNVYL JAI3238 SHOLO3NNOO YOLOANNOD TR 300 BELT PACK TRANSCEIVER SPECIFICATIONS TR 300 Overall Posverd te 6 AA cells Alkaline NEDA MN 1500 Nickel metal hydride optional Coene BOE IDEO TUE E PETIERE typical 82 mA 4 F to 130 F 20 C to 55 1911 4 25 W x 4 125 H x 2 0 D2. a E 6 BC 300NMI will charge nickel metal hydride batteries in a TR 300 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 Full charge of the battery pack is obtained af ter 12 to 14 hours A full charge will last 15 17 hours with nickel metal hydride batter ies Extensive over charging may damage or de stroy the batteries Please ensure the charging time does not exceed 24 hours Unplug the charger when not in use AL 0 2 Figure 37 BC 300NM1 Battery Charger ENERGIZER is a registered trademark of Union Carbide Corporation DURACELL4 is a registered trademark of Duracell Inc 31 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 Full charge of the battery pack is obtained af ter 12 to 14 hours A full charge will last 15 17 hours with nickel metal hydride batteries Extensive over charging may damage or de stroy the batteries Please ensure the charging time does not exceed 24 hours Unplug the charger when not in use Figure 38 BC 300NM2 Batter
3. Operating Instructions PROFESSIONAL WIRELESS INTERCOM SYSTEM TR 300 BTR 300 TABLE OF CONTENTS INTRODUCTION PPP rm 1 GENERAL DESCRIPTION eee A3 434 1 BTR 300 BASE STATION TRANSCEIVER 3 SPECIFIC ATIONS uuu 3 4 CONTROLS 5 TR 300 BELT PACK TRANSCEIVER 9 SPECIFICATION gu Re eee E oes ee ere 9 5 qoem denn qon d 10 CONTROLS AND CONNECTIONS 24524025 59 ead aa ROLES Rob RR 10 EQUIPMENT SET UP 2 54453 620065 13 DIR ODUSBISUPL nets So eee eee se ele ee eee RENE GN eee RN eee 13 ANTENNA INFORMATION ada OR ada OR 16 TEES OU SET UP Cc 23 PRE WALK THRU 15 24 SYSTEM 25 BTR 300 OPERATION 2 4 0 1 4 22 TROO OPERA TION op oop ee 26 ENABLING AUDIO sucio 445643080909 iti Kai isi Rs 27 SETTING SYSTEM GAIN LEV
4. INTERCONNECTION to 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 female connector con nected in parallel with each other Either works as an input or output EXTERNAL SPEAKER E YOLINOW Cy BINAURAL BELTPACK BINAURAL BELTPACK INTERCOM BTR 300 PA SYSTEM OR OTHER AUDIO INPUT Figure 21 Typical Interface to Wired System 2 Transmit Antenna 69 6 ust m Telex Communications Inc Auxiliary BTR 300 LIS 77 Input 1 2 S Wl 7 Ww g S y 7 Transmit Headset Mic Auxiliary Audio Output 1 e m e m Dyn Off Remote MADI DUMMY LOAD IF USED in Thru 5 SN E IN U S A S 2 r 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 c
5. if other than a Telex Headset 15 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 position Electret This switch is located on the rear panel A 5 volt bias is available at the micro phone plug for electret use 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 LO CATED 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 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 mon itor station only 20 Figure 1 Connecting Headset to the BTR 300 Headset Mic Dyn Elt Figure 19 Headset Microphone Select Switch Transmit Cont Off Remote Figure 20 Transmit Switch
6. 108mm x 105mm x 51 mm 13 oz 369g with batteries Transm ANGINA oie beue bote eMe S OI EE 1 4 wave wire attached ye NE E E RE EO 1 4 wave wire attached Transmit RPF Freg ency RANDE 150 216 MHz CUS yo eseese SEE EEE Crystal Controlled 0 005 Rm 50 mW Typical PTO AO 3000 Hz deviation 115 micro seconds Pre emphasis hu arat nou TREO Internal Compressor Modulation Freguency Range 300 to 5000 Hz 2 dB Microphone Audio 30 to 3500 ohms Microphone THDUE TID 2 mV Dynamic 4 mV Electret Radiated Harmonics and Spurious BIISSIODS 22 pori ea us 45 dBC Exceeds FCC Specifications 24 Qc Type Accepted Under Parts 90 and 74 Receive ID I E culos NE NENNEN UI EO PN DINER 150 216 MHz RF FPreguency Stability RD Crystal Controlled 0 005 Type Dual Conversion Superheterodyne FM RES DS Less than 0 5 uV for 12 dB SINAD E E A TE 007000000000 3 dB at 30 kHz Ceramic Filte
7. light to be illuminated continu ously and a bad battery will not cause any illumination at all Figure 30 Low Battery Overmodulation and Talk Indicator Lights HEADSET VOLUME After batteries have been checked adjust the volume control by rotating the control as re quired for comfortable listening volume ON OFF SWITCH AND VOLUME CONTROL Figure 31 Power ON OFF Volume Control TR 300 PUSH TO TALK PUSH TO TRANSMIT To enable the talk function on the Model TR 300 press and hold down on the talk but ton and begin talking Releasing the talk but ton will discontinue the microphone audio For continuous talk quickly press the talk but ton 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 NOTE The talk light will be illuminated whenever the talk function 15 activated TALK LIGHT PUSH TO TALK LOCK TO TALK SWITCH Figure 32 Push to Talk Lock to Talk Switch 26 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 light will illuminate when the remote on that fre quency is turned on The indica
8. 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 an tennas 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 17 Figure 16 Operating System Near Obstructions Placing the unit in an 2 Placing the unit on top of equipment rack and a shelf or equipment rack unobstructed without remoting the antennas is GOOD 3 Placing the unit in an equipment rack with the antennas mounted on the BTR 300 or the side of the rack is BAD remoting the antennas is GOOD Ceo C i a LES o Figure 17 BTR 300 Antenna Placement 19 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
9. ASE OVERMODULATION INDICATOR Figure 34 Adjusting Microphone Gain BTR 300 REMOVE BELT CLIP BTR 300 BASE STATION The microphone overmodulation indicator light for the BTR 300 headset can be found on the right side of the front panel The micro phone gain control potentiometer is located to the left of the indicator light TR 300 PORTABLE The overmodulation circuitry in the TR 300 uses the same light as the low battery cir cuitry If modulation is too high this light will illuminate 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 CAUTION DO remove this plug or attempt i fo adjust This beltpack has been precisely tuned 1 and any attempt to alter this adjustment will result 1 in a non operational unit 1 REMOVE THIS RUBBER PLUG FOR ACCESS TO THE MICROPHONE GAIN CONTROL Figure 35 Adjusting Microphone Gain TR 300 28 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 OVERMODULATION INDICATORS Figure 36 Auxiliary
10. ELS ma Gia Gal 28 SYSTEM WALK THRU ee ee ee 29 TROUBLESHOOTING 2 2 2 RR RI R3 9 hh hh 30 BATTERY ES CRAS RR 055445004 31 ACCESSORIES ex cee exp ax E xr ads 33 CUSTOMER 34 POC INFORMATION 35 E INTRODUCTION 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 audio HEADSET Jj RF CARRIER SIGNAL F CARRIER SIGNAL At the BTR 300 operator s command the remotes may communicate with each other with a wired intercom system or with an auxil iary system The BTR 300 Base Station with its one transmit and four receive channels is designed to operate in full duplex simulta neous two way communications with up to four TR 300 Belt Pack transceivers See block diagram in Figure 1 WIRED INTERCOM BTR 300 FM RECEIVER REC REC REC REC 1 2 3 4 HEADSET MICROPHONE ee E AUXILIARY AUXILIARY INPUT OUTPUT Figure 1 Block Di
11. Gain controls AUXILIARY GAIN If the audio volume at the auxiliary input is too high the Aux light will be illuminated when the person on the auxiliary is talking Decrease the auxiliary gain until the auxiliary light does not illuminate while talking at nor mal volume Occasional flashing of the auxil lary light is allowable The auxiliary indicator has three states OFF HALF BRIGHT and FULL BRIGHT When the switch 15 the indicator 15 OFF When the switch is IN it becomes HALF BRIGHT and when the in put is overmodulated it becomes FULL BRIGHT SYSTEM WALK THRU Now that you have successfully set up your RadioCom Wireless Intercom System and turned on any auxiliary equipment you are ready to test the overall performance by Walking the RadioCom system through the areas in which you will be using it Before you begin your walk thru check the following a TR 300 Battery Check u u Set microphone gain in both the TR 300 and the BTR 300 Check that the push to talk switches are engaged in the Lock to talk position and the light is illuminated Portable units to be used are en abled at the Base The system walk thru can detect problems of weak signal strength caused by e Poor antenna location Wrong antenna for receiver and or trans mitter RF Trouble Spots e Operating distance beyond system capability e Old or used batteries in the TR 300 Under normal conditions t
12. TTERY COMPARTMENT 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 crophone Battery Compartment Holds 6 AA batteries in a removable battery holder supplied ED 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 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 manufactured Product No 71276 15 set for Telex Audio Com and similar systems Product No 71280 is set for RTS 2 wire and similar systems Units originally set for Telex may be set to RTS and vice versa Both models may be set to interface with Clearcom and 4 wire RTS McCurdy matrix type systems The following paragraphs ex plain how to change the switches if necessary Remove Cover Remove the cover screws 13 and lift off the cover DIP Switch See Figure 8 and Table 1 Set the DIP switch as shown in the table High Low Switch See Figure 8 and Table 2 Set the high low switch as shown in the t
13. able Intercom Switch See Figure 8 and Table 2 Set the switch to 2 wire for all 2 wire systems Set the switch to 4 wire if the BTR 15 to be con nected to a balanced 4 wire intercom system through the Auxiliary input and output jacks Note Do not connect both 4 wire and 2 wire sys tems at the same time Loud feedback may result Replace Cover Carefully align the cover and replace the screws INTERCOM JACK WIRING CONFIGURATIONS See Table 3 for the wiring of the intercom and auxiliary jacks DIP SWITCH POSITION 2 3 5 6 7 Pp RTS 2 wire Clearcom Table 1 INTERCOM TYPE LOW HIGH SWITCH INTERCOM SWITCH Telex Audio Com RTS Clearcom 4 wire Low 2 wire High 2 wire 2 wire Low N A Table 2 13 4 wire 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 Telex Audio Com Ground 600 ohm 600 ohm Ground 2 2K ohm 2 2K ohm Ground Balanced Balanced Balanced Balanced Balanced Balanced RTS 2 wire Ground 600 ohm 600 ohm Ground 2 2K ohm 2 2K ohm Ground Channel Channel Balanced Balanced Balanced Balanced 1 2 Clearcom Ground 600 ohm 600 ohm Ground 2 2K ohm 2 2K ohm Ground Power Audio Balanced Balanced Balanced Balanced 4 wire Ground Balanced Balanced Ground Balanced Balanced Do Not Do Not Do Not Intercom Intercom Intercom Intercom Use Use Us
14. ables not supplied plugged into either of the intercom jacks See Figure 22 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 Con nect the AC power supply cord to the BTR at the socket labeled POWER Plug the power supply unit into an AC outlet DUMMY LOAD In the case where a wired intercom will not be used with the BTR 300 it is important that the dummy load supplied be installed The dummy load should be plugged into the In tercom Loop Thru connector See Figure 22 NOTE If the dummy load is not used an an noying squeal may result that may cause dam age to the ears POWER AC DC 12 OV 700mA QE Figure 23 Connecting the Power Supply 22 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 position This switch 15 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 mi crophone place t
15. agram of System 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 four TR 300 belt pack transceivers can operate in a fully duplex network with one RadioCom Model BTR 300 Base Station BTR 300 BASE STATION TRANSCEIVER 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 300 mV RMS typical for rated deviation Auxiliary Output 2 V 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 Speaker Local Monitor Output into 8 Ohms 2 Watts at rated deviation 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 bI aces Rec eee eee een sete ese ee eae eee NEN AEA 4 5 Ibs 2 kg Transmit RF Frequency Range 150 216 MHz RF Frequency Stability Crystal Controlled 0 005 Power Output 50 mW T
16. ay 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 re ceipt 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 con tact you Units that have been modified cannot be accepted for repair Include all information requested by the Service Department Then pack the unit as fol lows Check the unit to see that all parts and screws are in place Then wrap it in heavy 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 1t 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 mak
17. 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 sugges tions Change the location of the base unit and antennas or avoid the bad areas with the remote beltpacks Make sure the TR 300 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 300 beltpack on you will probably need to have your system s frequency changed to an other channel Check Transmitter switch on base use CONT or REMOTE position Check push to talk function is the switch ON 30 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 1s NOT recommended BC 300NM1 BATTERY CHARGER NOTE The BC 300NM1 is not supplied with the TR 300 See the Accessory section for ordering information CAUTION DO NOT ATTEMPT TO CHARGE ANY ALKALINE BATTERIES WITH THIS CHARGER
18. d Headset Connector A four pin XLR connec tor for Input Output Plug for Telex Jack for RTS units 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 MICROPHONE GROUND 1 3 and 4 MICROPHONE AUDIO 2 Plug for Telex Units MICROPHONE GROUND 1 BALANCED FEN 3 AUDIO OUTPUT 3 and 4 N MICROPHONE AUDIO 2 Jack for RTS Units Figure 5 Headset XLR Connector Wiring Charge Jack Allows nickel metal hydride batteries to be charged without removing them from the unit 10 AUDIO OUT LOW BATTERY OVERMODULATION INDICATOR LIGHT TALK INDICATOR LIGHT PUSH TO TALK LOCK TO TALK SWITCH Bat talk VOLUME OFF ON CONTROL BELT CLIP RadioCom V gt HEADSET CONNECTOR TR 300 p i CHARGE RECEIVE ANTENNA TRANSMIT ANTENNA JACK Figure 6 External Controls TR 300 EE DYNAMIC ELECTRET SWITCH ACCESS TO MICROPHONE GAIN CONTROL FCC ID BBDMXXX CANADA III S N MIC E D BA
19. e Out Out In In Table 3 Pin Wiring for Rear Panel Jacks CA101 INTERCOM 4 DIP SWITCH _ om FRONT Figure 8 Internal Intercom Switches 4 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 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 Figure 9 Attaching Brackets for Rack Mounting 15 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 Leaving off the top sec tion will result in reduced range DO DON T Figure 10 5 8 wave Antenna Assembly 16 To insure that the frequency of the antennas match the receiver and transmitt
20. e changes in design and improvement on its product without assuming any obligation to install the same on any of its products previously manufac tured 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 ap propriate telecommunications authority before ordering and choosing fre quencies CAUTION Changes or modifications made by the user could void the user s authority to operate the equipment 25 TELE TELEX COMMUNICATIONS INC 12000 Portland Ave South Burnsville MN 55337 U S A PN 803008 2 JAN 2001 Made in U S A
21. e the power switch on the BTR 300 in the ON position The red power on indicator light should illuminate er p owe Figure 27 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 comfort able listening volume INCREASES VOLUME LOCAL HEADSET VOLUME Figure 28 Volume Control BTR 300 PUSH TALK LOCK TO TALK SWITCH 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 discontinue the microphone audio For contin uous 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 light will be illuminated whenever the talk function 15 activated TALK LIGHT BTR 300 Talk Gain Push Twice to Latch PUSH TO TALK LOCK TO TALK SWITCH Figure 29 Push to Talk Lock to Talk Switch 25 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
22. ed to control the input level of the local headset mic This input is protected from overloads by means of a eain compressor whose operation is signaled by the gain light 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 se lected remotes and interfaces The indicators Portable Transmit On normally show the presence of a portable transceiver in use on the channel corresponding to that indicator 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 position is channel and the OUT position is channel 2 A screwdriver adjustable control is provided 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 respectively The function of the level control here is the same as that described for the intercom REAR PANEL Refer to Figure 4 Transmit and Receive Antenna Connec tors Attach 5 8 wave antennas supplied to these connectors Antenna color should match the color dot Tran
23. er of the BTR 300 match the color dot on the antenna with the color dot on the BTR 300 Attach the antennas to the antenna input re ceptacles unless the BTR 15 rack mounted Tighten the connector securely i Ceive Antenna COLOR DOTS Figure 11 Attaching 5 8 wave Antenna Remoting Antennas It will be necessary to remote both the transmit and receive antennas on the BTR 300 when it 1s 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 See Accessory section for order information i 4 more 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 Mount the 5 8 wave antenna by at taching it to a bracket not supplied 6 FT 2m is best gt minimum lt lt gt 1 o distance J o o B oa 5 Q 4 Figure 12 Remoting Antennas when Rack Mounted 417 ANTENNA POLARIZATION The Telex W
24. he Portable Trans mit On lights on the BTR 300 should always be lit when portables are transmitting Weak Signal conditions will result in flashing of the Transmit light In 99 of all instances you will set up your RadioCom Wireless Intercom System walk it through and achieve error free performance If in the rare instance your RadioCom System does not pass during your walk thru evalu ation refer to the last section of this manual which deals with system troubleshooting 29 TROUBLESHOOTING Reread the sections of this manual to make If you are unable to solve the problem con sure you have completed system set up prop tract the dealer from whom you purchased the erly system for assistance PROBLEM DISTORTION System s audio quality seems distorted at medium to high input levels HISS System seems to produce a 1155 which is undesirable LOW OUTPUT System produces a low output level FEEDBACK Moving around area of use produces squeal or howl in vari ous location using ext speakers DROPOUTS When moving around the area of use there seems to be locations where the signal swooshes or com pletely disappears INTERFERENCE System picks up signals other than wireless Intercoms NO AUDIO from BASE or BELTPACK headsets SOLUTION Reduce microphone gain by adjusting mi crophone gain control Check the gain setting on all beltpacks and the base They may
25. he 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 bat tery compartment r 7 X N 4 5 x V 2 7277 77 i FCC ID B5DMXXX S N i 7 E vw D N N NN ES Figure 25 Dynamic Electret Switch i ELECTRET lt DYNAMIC BATTERY INSTALLATION Insure that the OFF ON Volume control knob is turned OFF Access the battery compart ment 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 the battery holder from the box In sert 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 26 Battery Installation NOTE For maximum uninterrupted service it is suggested that new 1 5 volt alkaline AA bat teries be installed prior to each use Avoid shelf worn or economical bat
26. ireless Intercom System is 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 performance The following suggestions will result in optimum perfor mance Proper placement of the TR 300 can be criti cal The trailing antennas should dangle freely Wadding the antennas up and placing them in a pocket etc will reduce system range 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 14 Proper Dressing of the Antennas Keep the distance between the base BTR 300 and the belt pack TR 300 anten nas as short as possible The greater the dis tance the weaker the signal However the portables should be a minimum distance of 10 feet from the base station and each other for best performance Make sure the signal paths between the BTR 300 and remotes are unobstructed You should always be able to visibly locate the an tennas for best performance SIGNAL REACHES ANTENNA AT FULL STRENGTH WITH NO OBSTRUCTIONS Figure 15 Keeping Site Clear to Antenna ELA Attempting to operate the wireless intercom system through
27. ntable tercom and or other audio source e Powered by an external AC supply via the power jack on the rear of the unit It can also be powered by any 12V AC DC 700 mA source 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 units and jack for RTS units 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 MICROPHONE GROUND 1 BALANCED AUDIO OUT 3 AND 4 MICROPHON AUDIO 2 Plug for Telex Unit 2 GROUND 1 BALANCED AUDIO OUT WW 3 AND 4 N lt i WS MICROPHONE Headset AUDIO 2 Jack for RTS Unit Figure 2 Headset XLR Connector Wiring Local Headset Volume Adjusts volume to Local Headset DOES NOT AFFECT MI CROPHONE GAIN 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 illu minated whenever the talk function 1s on Local Microphone Gain Control and Overmodulation Indicator A screwdriver adjustable control is provid
28. r IT DE TU 70 dB or better CS FC HEAR QN RR 90 dB gwel T re Sold 3 0 uV Internal NOISE 90 32 mW into 600 ohms Headset Less than 1 at Rated Output FEATURES e Lightweight small size and is self contained e 2 separate antennas one for transmit the other for receive e 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 thumbwheel control serves as both an off on switch and as a volume control Low Battery and Overmodulation Indicator Light Low Battery Indicator Part of the battery check circuit When the power switch is placed in the ON position the light will flash one or more times if the battery 15 good A poor battery will cause the light to illuminate continuously and a bad or unus able battery will not cause any illumination at all Overmodulation Indicator Uses the same light as the low battery indicator During the talk mode if the microphone gain is too high the light will illuminate when talking Push To Talk Lock To Talk Switch This switch enables the talk function Talk Indicator Light Labeled will be illuminated whenever the talk function on the TR 300 15 enable
29. smit Switch Slide switch that allows the operator to select one of three transmit modes In the OFF position the transmitter is al ways off This mode may be used if the base 1s functioning solely as a monitor In the CONT position the transmitter is always on This continuous mode is recommended over the REMOTE mode In the RE MOTE position the transmitter is enabled only when one or more portables are active Headset Microphone Select Switch This switch allows the user to select either an Electret or Dynamic microphone Intercom Connectors Connections to inter face the BTR 300 with a wired intercom sys tem 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 intercom s tape re corders public address inputs or outputs Power Jack For external AC supply adaptor supplied Speaker Jack Allows the use of an external monitor if desired An 8 ohm speaker is rec ommended Speaker Volume Control Screwdriver ad justable Adjust clockwise to increase speaker volume or counterclockwise to decrease speaker volume NOTE Leave setting counterclockwise if no speaker 15 attached 00 414 4 39019 WINS YOLVIIGNI 1V201 1 NOILVINGOWYSAO HOLIMS M1V1 O1 43201 Olanv 1V201 M1WL OL HSNd NO 21 pes ee
30. teries Oper ation from nickel metal hydride batteries 15 also permissible Typical life of fresh alkaline batteries with the TR 300 is approximately 24 hours maximum 15 17 hours is typical of fully charged nickel metal hydride batteries NOTE Rechargeable batteries can be charged right in the TR 300 using the Telex BC 300NMI Battery Charger Refer to tery Information Section Rechargeable bat teries in the holder can be charged using the Telex BC 300NM2 charger Ds 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 matched color codes Set Dynamic Electret switches in both BTR 300 and TR 300 m mu m m Set transmit switch on BTR 300 Connected headsets to BTR 300 and all TR 300 s Connected the BTR 300 to any aux iliary audio intercom or external speaker Installed batteries in the TR 300 Remote Transceiver If you missed any of the above instructions go back and complete that instruction before go ing on SYSTEM 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 Plac
31. tors may also light in response to outside interference on that channel or to intermodulation arising from portables being used at too close a dis tance to the base To prevent these sources from creating undesirable noise all unused channels should be disabled INTERCOM SWITCH The intercom switch in the front of the unit will act as an enabling switch when the unit 15 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 or channel 2 AUXILIARY The AUX Switch on the front of the BTR 300 will enable any auxiliary audio input or 4 wire intercom that is supplied to the unit Figure 33 Enable Switches OF 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 to be increased An occasional flash of the overmodulation indica tor is fine 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 INCRE
32. y Charger 19 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 aa Order No Color Frequency Code Range 879248 1 Blue 150 168 9 MHz 879248 2 Yellow 169 184 9 MHz 879248 3 White 185 199 9 MHz 879248 4 Red 200 216 MHz AC Power Supply 12 Volt 60 HZ Order No 730139 000 BC 300NM1 Battery Charger Order No 70741 001 Includes 6 nickel metal hydride batteries and 1 carrier Charges TR 300 without removing the battery pack lt a BC 300NM2 Battery Charger Order No 70741 002 Includes 6 nickel metal hydride batteries and 1 carrier Charges 1 set of batteries outside of the TR 300 NMBP Battery Pack Order No 70741 003 6 nickel metal hydride batteries and carrier For use with BC 300NM1 BC 300NM2 Headsets Telex Configuration Order No PH 44 300853 100 PH 88 300852 100 HR 1 300534 007 HR 2 300534 000 RTS Configuration Order No PH 44R 300853 101 PH 88R 300852 101 HR 1R 300534 008 HR 2R 300534 001 233 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 Highw
33. ypical Modulation FM 3 KHz deviation 115 micro seconds Pre emphasis Transmit Antenna 5 8 wave supplied 5 239 connector on chassis Modulation Limiter Internal Compressor Modulation Frequency Range 300 to 5000 Hz 2 dB Radiated Harmonics and Spurious Emissions Exceeds FCC Specifications Type Accepted Under Parts 90 and 74 SPECIFICATIONS BTR 300 Cont Receive Frequency Range 150 216 MHz RF Frequency Stability Crystal Controlled 0 005 Dual conversion superheterodyne FM RF Sensitivity Less than 0 6 uV for 12 dB SINAD IF Selectivity 3 dB at 30 kHz 4 pole Monolythic Filter Image Rejection 65 dB or better Squelch Quieting sets see TT 1 0 uV Internal Signal to Noise Ratio Receive Antenna 5 8 wave supplied 50239 connector on chassis Distortion Less than 1 at Rated Output 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 e ntercom connections with the ability to in terface with most wired intercom systems RF light indicator for each portable station e An extremely flexible unit that has the capa metal case for superior shielding bility to communicate at one time with up to four portable stations and wired stations in Table or rack mou
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