Bogen TBA-15 User's Manual
Contents
1. O 6 ir 5 Zy S ce Zu 55384802 r ASI 29 ASI ASG i MZ 8 15088 T a sov San 182 S 4 Ol 952 1d CH 2 2 RA M2 3 62 002 A cae 123 85 152 7 H 92 i 897 02 G I CANVL 95 F wot 52 ee 1 9 81 8132 SOVSdW whe 1 0 4 so 8 a 1799 42 8 ZS 5328 13922 AGI 9 2 AQ oe ore A 9 682 2 2 9 890 yz 5 2 rpa osy ZL 48 ae 2 se PS Alg feet yaq 9109 la 91 621 823 g 2 863 949 op 42 082 du Aether 25 pOOPNI 98 12 21 OER 222 AG AGI d Aa lt 6 Ag O 3922 pod igh sey Ol 48 AGI 99 ay a a on HOVE TV A Cy AS EAD gi 39 9118 Ape 016 123 97h 20 0 0 6p sou 3 808 r gt a 3489 3 i ONA AGI D ecu 0 100 4 gy 193 94 254 WO iN ved 821 Gra 425 990 82 AS 82 AZZ 232 BOGEN COMMUNICATIONS INC 50 SPRING STREET P O Box 575 RAMSEY NJ 07446 201 934 85002. number which begins with 45 Kef No C1 C3 18 27 C5 14 34 C7 13 C12 19 C15 C24 25 35 26 1 4 15 16 CR5 8 9 10 12 17 18 CR6 7 CR13 14 19 20 CR21 1 5 1 2 IC 3 1 6 IC 7 IC 8 9 10 11 12 015 03 4 CB101 T102 T101 Part No 45 7343 05 79 119 015 79 126 057 79 126 069 79 126 049 79 126 068 79 126 055 79 126 058 79 126 044 96 5333 01 96 5430 01 96 5344 02 96 5344 10 96 5344 15 96 5595 01 96 5648 01 96 5720 01 96 5649 01 96 5439 01 96 5658 01 96 5468 01 96 5471 01 96 5690 01 96 5441 01 96 5290 01 96 5721 01 96 5722 01 77 006 001 711 001 853 777 006 004 76 155 092 83 478 000 96 5403 01 94 0025 03 83 843 000 83 500 000 Description P C Board Component Board Assy Cap Elect 3300uF 63 Cap Elect 47 50 Cap Elect 1 50 Cap Elect 470 35 Cap Elect 100u F 63V Cap Elect 4 7 50V Cap Elect 10 50V Cap Elect 1000 uF 35V Diode 400prv 1 IN4004 Diode IN4148 Diode Zener 12V 2W Diode Zener 5 1V 2W Diode Zener 22V 2W LM339N CA3280AE LM1458N LM1875T 1 C LM380N 8 H11F1 I C CD4066BE TLO72CP LM833N LM7815T or LM340T15 Transistor MPS A05 Transistor IRF531 Transistor 0808 Trimpot 1 kilohm Control 5 kilohms Trimpot 10 kilohms Resistor 1 ohm 1 watt 5 Transformer Input Chassis LED Red
3. BOGEN COMMUNICATIONS INC PAGING TALKBACK AMPLIFIER INSTALLATION AND ADJUSTMENT INSTRUCTIONS FCC Registration No under Part 68 Rules CD272Q 17147 KX N Ringer Equivalence 0 0B The Bogen Model 15 is fifteen watt paging talkback amplifier which complics with Part 68 of FCC rules The unit per mits two way communication between a telephone handset and one or more zone s of remote loudspeakers When used with optional Bogen accessories paging to up to nine separate zones of loudspeakers is possible The TBA 15 senses and automatically switches the direction of conversation from telephone to loudspeaker without the use of relays or other moving parts Control of speech direction is main tained at the telephone handset Controls are provided to adjust the switching sensitivity switching delay and loudspeaker and talkback handset volume levels The TBA 15 has a talkback frequency response which has been shaped for maximum intelligibility and background noise rejection Switching delay time is adjustable from less than 50ms to greater than 0 5 seconds to ensure an intelligible flow of conversation A power on LED circuit breaker and speaker volume control are located on the front panel A recess in the panel protected by a removable cover houses the 600 ohm transformer coupled tele phone line input 25V and 70V constant voltage outputs and muting terminals for one way paging Controls to adjust sen sitiv
4. Circuit Breaker 1A Transformer Power Transformer Output TO STATION SYSTEM TAM PAGING OUTPUT pp kap 1 5 40 m H 24 48 SUPPLY POWER SUPPLY REQUIRED FOR b TRUNK LEVEL ACCESS Figure 3 Single Zone Talkback with TAM Accessory ro ANALOG PHONE SYSTEM 1 STATION LINE EXT ENABLE TM PAGING ourPuT bE CONTACT CLOSURE 5 POWER SUPPLY t 5443 1 8 BGM IN BGM RET PG OUT PG O R TBA OUT TBA 0 8 MUTE LINE ZONE ZONE 2 ZONE 2 ZONE 3 ZONE 3 ZONE 4 0000000001 00000000001 ZONE 5 CUUOOUOGOUL N 4 v gt m 2 2 ZONE 6 Zones COC 0 5 3 zone DOO oom 205 8 OOO ZONE 8 100000000000000000000000 0000000000 000000000000000000000000 0000000000 Figure 4 Multi Zone Station Level Paging with TAM and ZPA 9 Accessories 5 06 1361 206019455 ST VAL NJi 7 2 580151538 W114 WLIN 53172101 72 82 197030 540112 550151535 Vv 03131239 JSIMY3H O SSIINN I 4 4 5310 100 94 gg 55 AGt pa Sly 2 001 68 IZH b ENY Cnr 0132 v1 POOPNI 12 AEE
5. ble volume level over the handset The talkback volume level should be set on the low side to improve intelligibility Higher settings will tend to muddy the sound since the back ground noise will become a significant signal at the telephone With the person in the paging zone silent rotate the SWITCH SENS control clockwise until the switching becomes unstable switches back and forth by itself Rotate the control counterclockwise until the switching again becomes stable At this point the unit is critically stable any noise on the telephone side will cause the unit to switch to the talk mode and any loud impulse type noise at the loudspeaker may cause the unit to switch to the talkback mode With the person in the talkback zone speaking rotate the SWITCH SENS control counterclockwise so that the unit does not switch Have the person in the talkback zone make loud impulse noises that may be characteristic of the environment door slamming machine noises etc If necessary make additional adjustments to the SWITCH SENS control so that the unit does not switch momentarily to the talk mode Speak into the telephone handset in a normal paging voice The TBA 15 should switch to the talk mode switching will be ap parent by the total absence of background noise in the handset earpiece If the unit does not switch increase the sensitivity by rotating the SWITCH SENS control clockwise until switching becomes consistent R
6. ds to protrude 1 8 to 1 4 Fit the chassis onto the screw heads at the keyhole slots and position two bottom screws Complete the installation by tightening all screws securely For best support use self fastening hardware when mounting the unit to plasterboard or similar thin materials The unit weighs 7 Ibs For rack mounted installation install the unit facing into the rack A blank panel may be used to cover the exposed rear surface of the amplifier Secure the unit and blank panel with the same screws POWER AND GROUNDING The AC line cord is terminated in a three prong plug which should be plugged into a three wire grounded outlet It is important to ground the amplifier proper ly Pigtail adaptors may be used only when properly connected to a grounded outlet A front panel LED illuminates when power is applied to the unit CONNECTIONS All connections to the TBA 15 are made through a screw ter minal strip Figure 1 located within a recess on the amplifier front panel Keyhole slots on the recess cover allow for quick access to terminal connections Knockouts are provided on the cover to admit wiring Run input and output wiring through separate knock outs Printed in U S A 8807 54 5870 01 THE FOLLOWING INFORMATION IS REQUIRED PART 68 OF FCC RULES TO BE SUPPLIED TO THE PUR CHASER OF REGISTERED EQUIPMENT This equipment complies with Part 68 of FCC rules and regula tions The FCC registration number and ring
7. echeck the unit s response to impulse noises step 6 making sure that the person in the talkback zone is not uncharacteristically close to the loudspeaker To set the switching delay start a moderately fast alternate count between the telephone side and the talkback zone Ad just the SWITCH DELAY control so that the complete response from the talkback zone can be heard Clockwise rota tion minimizes delay counterclockwise rotation increases delay Then while speaking into the telephone handset check the delay to ensure it will allow short pauses between words without switching into the talkback mode Adjust for a slightly longer delay if the unit switches between words A slight pause is generally advisable for speech continuity and intelligibility MAINTENANCE CAUTION There are user serviceable parts within the amplifier To avoid an electric shock hazard have all internal servicing performed by qualified service personnel only CIRCUIT BREAKER A circuit breaker protects the TBA 15 from shorts and sustained overloads If it trips the pilot lamp will go out and the amplifier will have no output To reset remove the AC line cord from the wall outlet and press the red reset switch Plug the AC line cord back into the outlet If the circuit breaker continues to trip have the trouble investigated by a qualified technician BOGEN SERVICE We are interested in the maintenance of your Bogen equipment If trouble develo
8. er equivalence num ber are printed on the front panel of this equipment You must upon request supply this information to your telephone com any If this equipment causes harm to the telephone network the telephone company may temporarily discontinue your service If possible they will notify you in advance If such notice is not prac tical you will be notified as soon as possible You will be in formed of your right to file a complaint with the FCC The telephone company may ask that you disconnect this equipment from the network until the problem has been corrected or until it is determined that the equipment is not malfunction ing TELEPHONE LINE The TEL LINE terminals are a 600 ohm transformer balanced telephone side connection dry signal only no loop current In typical applications with a single paging zone this line interfaces with a station port or trunk port of an in house telephone system via the Bogen TAM Telephone Access Module or other suitable interface and is reached by dialing a number reserved for paging LOUDSPEAKERS The TBA 15 provides 25V and 70V constant voltage speaker outputs for balanced systems Use two conductor shielded cable with insulation over the shield Connect one con ductor to the 25V or 70V terminal and the other conductor to the COM terminal Connect the cable shield to the GND terminal The total speaker load should not exceed 15 watts MUTE The 15 may be config
9. feat two way function Power Requirements 120V 60Hz 0 7A Temperature Range 0 50 C 32 122 F Humidity Range 0 95 non condensing Enclosure Sheet metal finished in textured black enamel Overall Dimensions 5 1 4 H x 19 W x 2 7 8 D 13 3 48 2 7 3 Weight 7 Ibs 3 2kg TALKBK SWITCH SWITCH VOL SENS DELAY YOO Figure 1 TBA 15 Terminal strip SWITCHING DELAY Adjusts the release time of the VOX cir cuit allowing for short pauses between words without causing the unit to switch to the talkback mode in the middle of a sentence Clockwise rotation increases the delay counterclockwise rotation decreases delay CONFIGURATIONS REMOTE PRIVACY Any remote speaker may be modified for privacy as shown in Figure 2 When 1 is open paging an nouncements from the telephone handset are received at the loudspeaker but the telephone operator cannot monitor the luudspcaker arca SINGLE ZONE TALKBACK WITH TAM A single paging zone at the trunk or station level is shown in Figure 3 This configura tion uses the Bogen Mode TAM Telephone Access Module Note that the power supply Bogen Model PRS AS A is only required for the trunk access mode MULTI ZONE STATION LEVEL PAGING The use of a Bogen Zone Paging Accessory permits up to nine zones of paging Refer to Figure 4 Both one way and two way zones may be incorporated in this configuration Installation in
10. ity switching delay and talkback volume are also located within the panel recess The amplifier operates from a 120 volt 60Hz AC source A press to reset circuit breaker protects the unit from excessive cur rent flow Safe Operating Area SOA and thermal protection safe guard the output device The unit is finished in textured black enamel and mounts easily on a wall backboard or in standard 19 equipment racks INSTALLATION Warning To prevent fire or shock hazard do not expose this equip ment to rain or moisture There are user serviccable parts within this equipment Removal of the cover presents an electrical shock hazard Have all internal service per formed by qualified service personnel UNPACKING This equipment was carefully checked before leav ing the factory Inspect the unit and shipping carton for indications of improper handling In case of damage make an immediate claim to the dealer or distributor from whom the unit was purchased If the unit was shipped to you notify the transportation carrier without delay and place a claim MOUNTING Avoid proximity to heat sources and strong magnetic fields Provide for adequate ventilation for chassis heat dissipation To eliminate possible cross talk interference do not run input and output lines close together and route through separate knockouts on the terminal strip cover For wall mounted installation locate two top screws 18 5 16 apart allowing the screw hea
11. ols the volume at the loudspeaker Clockwise rotation of the control increases the level counter clockwise rotation decreases the level TALKBACK VOLUME Adjusts the talkback volume level in the handset earpiece Clockwise rotation increases the level counter clockwise rotation decreases the level SWITCHING SENSITIVITY Adjusts the point at which the VOX circuit will switch from talkback to talk modes Clockwise rotation increases sensitivity counterclockwise rotation decreases sen sitivity TECHNICAL SPECIFICATIONS TELEPHONE TO LOUDSPEAKER Rated Power Output 15 Watts Frequency Response 200Hz to 10kHz Input Sensitivity 20dBm Input Impedance 600 ohms balanced Distortion RPO Less than 3 150 input signal Signal to Noise Ratio 50dB 20Hz to 20kHz Voice Activated Switching Sensitivity 46dBm Attack Time Less than 5ms 3ms typ Switching Delay Time Adjustable from lt 50 to greater than 0 5sec Constant Output Voltage 25V or 70V balanced line LOUDSPEAKER TO TELEPHONE Frequency Response 1500Hz to 20kHz Distortion Less than 2 Signal to Noise Ratio 40dB Output Level Processed to meet FCC Part 68 2 GENERAL Controls Loudspeaker Output Volume Talkback Volume Switching Sensitivity Switching Delay Circuit Overload Protection Push to Reset Circuit Breaker Safe Operating Area SOA and thermal protection for out put device Unidirectional Operation Terminals provided to de
12. ps do not hesitate to ask our advice or assistance Information can be obtained by writing to Service Department Bogen Communications 50 Spring Street Ramsey New Jersey 07446 When communicating with us give the model number and scrics designation of your unit Describe the difficulty encountered and the effect each operating control has upon the symptoms of trouble We will send you service information if the trouble appears simple If the trouble requires servicing we will send you the name and ad dress of the nearest authorized Bogen Service Agency to which you can send the unit for repairs When shipping use the original carton or a similar container and filler material to prevent damage Send the unit fully insured and prepaid via responsible carrier The unit will be repaired and returned to you collect freight prepaid while under warranty REPLACEMENT PARTS CAUTION Improper soldering may damage components or the printed circuit board and such damage can void the warranty Most components used in the amplifier are standard parts avail able through reputable parts suppliers The parts listed here may be obtained from Bogen distributors service agencies or directly from the factory When ordering a part specify a part number the model of the unit and give the series designation which is a letter followed by numbers printed on the chassis For parts on the cir 4 cuit board also give the component board assembly
13. structions are furnished with the module 25V OR 70V F TO TBA 15 74 2665 01 NOTES CR2 ARE 50 pry IA 144001 OR EQUIVALENT SWI IS AN SPST SWITCH Figure 2 Remote Privacy ADJUSTMENT PROCEDURE Controls are provided to adjust the performance of the TBA 15 Since these controls interact with each other the following proce dure should be used to set the unit for optimum performance Adjusting the performance the TBA 15 requires two people one in the talkback zone having the highest background noise level and one at the amplifier location Due to the high sensitivity of a telephone mouthpiece sound from a nearby speaker may cause the TBA 15 to switch Do not adjust while using a speaker located near the telephone 2 GND 25V 70V 0000000 Note Where possible use only one type of speaker in each zone Horn type loudspeakers provide a significantly stronger talkback signal than from a cone type speaker and pre ferably should be used when this procedure is performed Also better results are achieved when speakers are tapped closer to their maximum power Set the SWITCH SENS control at its full counterclockwise posi tion Set the SWITCH DELAY control at about mid rotation Have the person in the talkback zone speak in a voice loud enough to overcome the ambient background noise level Rotate the TALKBK VOL control clockwise to obtain an ac cepta
14. ured for unidirectional tele phone to loudspeaker operation if desired by connecting the MUTE terminal to the MUTE terminal The MUTE ter minal is a current limited by a 1 kilohm resistor 15 volt supply provided primarily to control the talkback mute feature however Your telephone company may make changes in its facilities equipment operations or procedures that may affect the proper functioning of your equipment If they do you will be notified in advance to give you an opportunity to maintain uninterrupted telephone service Note that for all applications of this equipment coin service and party lines may not be used This equipment is typically used as an adjunct device to other registered equipment i e PABX 142 KEY or Electronic Key Systems Such host equipment may be leased If so permission of the owner should be obtained prior to installation of this equipment If you experience trouble with this equipment please contact the Service Department of Bogen Communications Inc at 50 Spring Street Ramsey New Jersey 07446 telephone 201 934 8500 Information will be provided regarding service or repairs it may be used to supply power to auxiliary equipment e g TAM external VOX enable The MUTE terminal is the talkback mute control terminal 5VDC or greater referenced to the GND ter minal of the TBA 15 applied to this terminal will defeat the talkback feature CONTROLS OUTPUT VOLUME Contr
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