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1. e Q amp Q ep 3NOHdOMOIW H3aldl1dINV 38d HaladlTdiNV m m O CES mem LSOH NOILOALAG LINVA ea cnm e S gt Sar P A i e T 9 gi 30017 3XIIN 19 7 DEVICES CONNECTION DIAGRAM VI Slave 1 20 X J9 Se A dwy 1s0d aid jno e e s i jonuoo a euo 21 8 BLOCK DIAGRAM IBS am Auoud Uf wsmomomiows Model Frequency response Distortion Bass control Treble control Mic line input Sensitivity Phantom power VOX function 100V connectors priority Mina input Line output Aux output SNR Loop output Current Max power consumption Dimension mm Weight T 10ALP 50Hz 10KHz 1 3dB lt 1 Rated output power 1KHz 10dB 100Hz 10dB 10kHz 3 roads XLR connectors balanced mic line level switchable 5mV 0 775V mic line impedance gt 1K ohms 48V switchable input 1 road switchable mute input 2 3 roads input balance input impedance gt 10K ohms priority input 1 3 roads 1 road connector 6 3 phone jack rated level 1V impedance
2. 20 8 BLOCK DIAGRAM eee aE 21 9 EUM 22 10 DIMENSION FIGURES pesisiran cee eee sede re ete sese e e ri nennen 23 1 SAFETY PRECAUTIONS VI Be sure to read the instructions in this section carefully before use Make sure to observe the instructions in this manual as the conventions of safety symbols and messages regarded as very important precautions are included e We also recommend you keep this instruction manual handy for future reference Safety Symbol and Message Conventions Safety symbols and messages described below are used in this manual to prevent bodily injury and property damage which could result from mishandling Before operating your product read this manual first and understand the safety symbols and messages so you are thoroughly aware of the potential safety WAR N N G Indicates a potentially hazardous situation which if mishandled could result in death or serious personal injury CAUTION Indicates a potentially hazardous situation which if mishandled could result in moderate or minor personal injury and or property damage A WARNING When Installing the Unit When Installing the Unit e Do not expose the unit to rain environment e Should the following irregularity be found during where it may be splashed by water or other liq
3. Circuit output follow the polarity matchesthe wiring and the powerload otherwise it willlead to the production of machine failure phenomenon Rated load 240W 3 EU Figure 3 Basic operation channel 1 In channel 1 inputterminal input 385mV signal source e Switch on power indicatoron after about 5 seconds thereis outputfunction in amplifier if after 30 seconds there is still no output please recheck switch and setting of control knob e Adjust channel 1 volume and master volume separately users canhear loud and clear voice e Adjust bass potentiometer users can obviously feel a powerful bass change e Adjust treble potentiometer users can obviously feel clear and melodious treble change Lf 0 0 XJ Function operation Panel indicators introduction as below e LOOP indicator Completed loop indicators the indicators are green when there is output prompt in left level indicators right indicator is off it means opened status Refer to figure 4 O LOOP INTEGRITY e AGC indicator In automatic gain status the indicators are green when automatic gain effect in max status indicators will be dark butit will not affect AGC function Refer to figure 5 e LIMITER indicator Pressure limit indicator the indicators are orange itmeans output signal in pressure limit status refer to figure 6 O LIMITER 10
4. Note All masterand slaveinduction loops must have the samesize Expanded quadrature systems e To coververy large areas create an expanded quadranture system refer to figure 18 for an example Such a system consist of a master loop amplifier M with one or more induction loops master induction loops must have the same size Anodd number of slave amplifiers 51 52 53 etc with one or more induction loops slave induction loop must have the same size 16 1 1 3 Om 2 M figure 18 Low spill system e Aspecial type of quadrature systems is the low spill system refer to figure 19 a low spill system makes sure thatthe magnetic field strength drops even more rapid to zero beyond the borders of the covered area Such asystem consist of amaster loop amplifier M with one or more induction loops All master induction loops musthave the same size Anodd number of slave amplifier S1 in this example with one or more induction loops slave induction loops musthave the same size Two slave amplifier S2 and S3 inthis example with one induction loop The width of the induction loops must be between 50 and 60 of the width ofthe master induction loop Cfswwowmxw 4 50 66 gt Yn lt 50 66 W figure 19 Induction loops Introduction When you make an induction loop you musttake anumbe
5. Lf operamos 0 0 XJ Function operation e FAULT indicator Faulty indicator the indicators are red it means thereis faulty in the device refer to figure 7 POWER indicator Power indicator the indicators are blue it means the device isin working status referto figure 8 OUTPUT CURRENT indicator Output power indicator itneed to connect with overload the indicators will show the amplifier output working current range from 1 104 referto figure 9 1 o o 5 o o 10 OO 0 0 0 0 OUTPUT CURRENT 11 Dorma X Function operation Built insignal level indicator power indicator No 6 indicator is red it means device output signal source exceeds standard status Referto figure 10 12 Jorn V Function operationintroduction Automatic gain function When automatic gain is dialed on AGC position choose automatic gain it can adjust Gain Potentiometer and choose output range 1V 28V Low pass function When lowpass frequency is dialed on 10K position signal frequency start toattenuate above10K range about 3dB dialed on 5Kposition signal frequency start toattenuate above 5K range about 3dB Mute function There is 2 level priority function the first priority is 100V fire alarm signal input then input 1 is priority than input 2 input 3 Note When the device isused asslave allthe priority functionis in
6. e Besure to ground to the safety ground earth accidentally spill into the unit this may cause a terminal to avoid electric shock Never ground to a gas pipe as a catastrophic disaster mayresult fire or electric shock e Avoid installing or mounting the unit in unstable Donotinsert nor drop metallic objects or flammable locations such as on a rickety table or a slanted materials in the ventilation slots of the unit s cover surface Doing so may result in theunit falling as this may result in fire or electric shock down causing personal injury and or property damage A CAUTION When Installing the Unit Never plug in nor remove the power supply plug with wet hands as doing so may cause electric shock When unplugging the power supply cord be sure to grasp the power supply plug never pull on the cord itself Operating the unit with a damaged power supply cord may cause a fire or electric shock When moving the unit be sure to remove its power supply cord from the wall outlet Moving the unit with the power cord connected to the outlet may cause damage to the power cord resulting in fire or electric shock When removing the power cord be sure to hold its plug to pull Do not block the ventilation slots in the unit s cover Doing so may cause heat to build up inside the unit and result in fire Avoid installing the unit in humid or dusty locations in locations exposed to the direct sunlight near the
7. heaters or in locations generating sooty smoke or steam as doing otherwise may result in fire or electric shock Due to product upgrades while some of the features and specification in the user manual does not match the actual functions sorry for any inconvenience and thanks for your kind understanding When Installing the Unit Do not place heavy objects on the unit as this may cause it to fall or break which may result in personal injury and or property damage In addition the object itself may fall off and cause injury and or damage Make sure that the volume ontrol is set to minimum position before power is switched on Loud noise produced at high volume when power is switched on can impair hearing Do not operate the unit for an extended period of time with the sound distorting Thisis an indication of a malfunction which in turn can cause heat to generate and result in a fire Contact your ITC dealer as to the cleaning If dust is allowed to accumulate in the unit over a long period of time a fire or damage to the unit may result If dust accumulates on the power supply plug or in the wall AC outlet a fire may result Clean it peri odically In addition insert the plug in the wall outlet securely Switch off the power and unplugthe power supply plug from the AC outlet for safety purposes when cleaning or leaving the unit unused for 10 days or more Doing otherwise may cause a fire or electric shock An all
8. audio signals In the T orMT mode the internal microphone of the assistive listening devices is switched offand a little coil is activated T standsfor Tele coil figure 14 The coilreceives the alternating magnetic field Simple single loop system and changesit into an alternating voltage which the assistive listening devices change intoan audio signal This audio signal is not entirely the same asthe incoming audio signal of the loop amplifier because the assistive listening devices also compensate for individual hearing disabilities for example signal strength and frequency range referto figure 13 figure 15 Simple multiple loop system One ofthe keyfeatures ofthe loop amplifier is that itcan beused in quadrature systems e Asimple Quadrature system consistof refer to figure 16 Assistive listening device 1 Tele coil M 2 Microphone 3 Gain control 4 5 Earphone Amplifier o figure 16 19 Cf swwwowmm A master loop amplifier M with one induction loop Aslave loop amplifier S with oneinduction loop refer tofigure 16 To cover larger areas create abasic system with multiple induction loops referto figure 17 90 90 figure 17 A master loop amplifier M with multiple induction loops Aslave loopamplifier S with multiple induction loops
9. 10K ohms XLR balanced connectors ratedlevel 1V impedance 200 ohms connector 6 3 phone jack 0 or 90 rated level 1V impedance 200 ohms 263dB rated current6A Maximum output current is 10 AC 230V 115V 10 50 60Hz 500VA 484X390X88 10 3kg 22 10 DIMENSION FIGURE VI Unit mm 484 7 o O OOOO x 28 J 25 321 a 6 The loop amplifier should keep 10cm distance with the objects which block the air circulation in orderto avoid internal device temperature rise o Over 100 20 PUBLIC ADDRESS SYSTEM
10. 8 19 20 21 22 23 24 25 26 2T 28 AC 115V 230V Power input Radiator Fan AGC AGC potentiometer Output adjustment range 1V 28V AGC LIMITER Gain Control Low frequency range 5K 10K LINE OUT Pre line balanced output standard output of about 500mV Input channel 1 Balanced input signal ist385mV PHANTOM Input 1 Channel 1 phantom power switch the output DC voltage DC48V MIC LINE MIC LINE Input switch button MIC 2 5mV LINE 385mV VOX MIX Priority control for input 1 Input Channel 2 PHANTOM Input 2 Channel 2 phantom power switch Output DC voltage DC48V Channel 2 MIC LINE input switch MIC 42 5mV LINE 385mV Input Channel 3 PHANTOM Input 1 Phantom power switch 48V DC 30 31 32 MIC LINE Input switch MIC 2 5mV LINE 385mV Auxiliary 90 phase oupput Auxiliary 0 C phase output MASTER SLAVE It works a Master when itshows Master it worksas Slave when it shows Slave Inputs from channel 1 3 is invalid MASTER IN Master inputterminal 775mV unbalance signal input MATAI LOSS COMPENSATION Metal compensation potentiometer adjust the effect 0 8dB SUPERVISION Fault output optional Short circuit output or Open circuit output FAULT Fault output terminal PRIORITY INPUT VOLUME Prior input terminal poteniom
11. PUBLIC ADDRESS SYSTEM T 10ALP MIXER LOOP AMPLIFIER Please follow the instructions in this manual to obtain the optimum results from this unit We also recommend that you keep this manual handy for future reference IVANVIA NOILVYAdO tasteorcontents 0 0 OA T SAFETY PRECAUTIONS rettet idea ih au FORE FEHRA DIR 3 2 FEATURES coupe MM URP CUM ME TE PMCID ALIE 5 3 NOMENCLATUREAND FUNCTIONS Sek Frnt Panel osos eroi 6 SRM E 7 4 OPERATION INSTRUCTION 4 1 Operation 8 4 2 Basic operation channel 1 9 4 3 Function operatiOn nya AEA A ria ui 10 4 4 Function operation introduction 13 4 5 Guidance of excluding errors niet idee near 14 5 SYSTEM OVERVIEW 2 I PEIDOIDIO D 15 5 2 Assistive listening device iei P b ER 15 5 3 Quadrature system toe kel konkret ore esL EE ESENE ore rs 15 5 4 Expanded quadrature 16 5 5 Low splllisystem sects edt a 16 5 6 INDUCTION 17 5 7 Magnetic field Strength cece cece ee 17 6 APPLICATIONS IP 19 7 DEVICES CONNECTION DIAGRAM
12. UT NPUT1 NPUT2 INPUT3 are invalid all are shielded Itcan only input about 775mV signal in Master input AUX output There is Aux 90 phase position about 1V signal and Aux 0 phase position about 1V signal output in Aux output Earphone function Front panel jack parallel output balanced signal 1 2V Pre output function LINE OUT output balanced signal about 500mV refer tofigure 12 C omwm V GUIDANCE OF EXCLUDING ERRORS PHENOMENA CAUSE 1 No power or wrong plug connection All the wires are connected well but no 2 Fuseis burned voice output 3 Volume is town off 4 Noinput signal 1 Overloading or short circuit 2 Voltage is not stable too high or low Power on but alarming signal 1 Machine is in protection condition in case of high No voice output in normal condition temperature 2 Wrong wire connection 14 Cfsswmwowmum 8 Principle Quadrature system e The loop amplifier changes incoming audio Brief introduction refer tofigure 14 15 signalin an alternating electric current that is sent through the induction loop The strength and frequency of the electric current varies with the tone andthe amplitude of theincoming audio signal and generates and alternating magnetic field inside the induction loop People with assistive listening devices whoarelocated inside the induction loop can puttheir assistive listening devices inthe Tor MT mode to listen to the
13. ds onthe size of the induction loop 2 Use figure 22 to getthe allowed wire diam eter for example in arectangular room with a width W of 10m anda length L of 30m the wire length is 80m According to figure 22 the wire diameter must be between 0 77 and 1 34 mm Thus youcan use AWG20 wire ora wire with a standard diameterof 1 00mm Magnetic field strength For the best audio quality the vertical compo nent ofthe magneticfield mustbe 100mA m 3dB at 1 2m abovethe floorinthe areathat is surroundedby aninduction loop The strength ofthe magneticfield depends on the electric currentthrough theinductionloop Peaks inthe strength of themagnetic filed must be lessthan 40mA m at 1 2m above the floor in thearea thatis surrounded by theinduction loop Cf swwwowmm W 0 10 20 30 40 50 60 70 80 90 100 Width figure 21 Extra powervs the widthof theroom 3 00 T a a AWG 20 0 75 0 25 34 50 76 90100 135 150 200 250 300 350 Wire length m figure 22 Wire diametervs the wire length copper wires 18 X REAR PANEL CONNECTIONS 6 APPLICATIONS 1nO3AviS AIIM NINSLSVW f SSOTIVIVW 220 NO e Q Q aws WalSvW Q 06 0
14. eter PRIORITY INPUT Fire alarm prior input 100V alarm signal input Loop output Loop output to be connected to loop load Lf ommo Operation before use Please check whether the power voltage is consistent with the local network before turn on the power then set the control elements as the below table Figure 1 Note After settingthe following switchs and control parts then inputsignal source then connected to the circuit outputload and Defult Configuration FUNCTION NUMBER SET Power Turn Off Master Volume 5 0 scale Trebel 4 Middle Bass 3 Middle Input channel 1 3 2 O scale Master Slave Switch 62 Master Automaticly Gain Control 7 Limiter Low frequency Control Music 10K Mic 5K Prior Metal Compensator Turn rightto the maximum Phantom Power Switch 2 69 G9 Turn Off Line Input Selector 22 69 29 Line Jorn V Operation beforeuse Input signal follow the match onthe polarity of the signal source wiring otherwise it will cause the generation of machine failure phenomenon Namely INPUT 1 footsignal ground Signal the 2 Signal pole Channel input selection in the MIC state the input signal voltage is approximately 5mVorso Channel output options in the LINE state the input signal voltage is approximately 775mV Figure 2
15. pole mains switch with a contact separation ofat least 3mm in each pole shall beincorporated in the electrical installation of the building Lf 2rewus 1 3Mic Line Inputs 2 Individual Volumn Control 3 240W 10A Output 4 Build in Low pass 5KHz 10KHz 5 Built in AGC limiter metal compensation circuit metal 6 Built in signal level the currentlevel indicator 7 2 levels of priorities Input 1 higher thaninput 2 3 Fire alarm 100V input higher thaninput 1 3 8 Faultyoutput feature 9 Auxiliary 0 phase oupputand 90C phase output automatically adjusts J 3 NOMENCLATURE AND FUNCTIONS VI 3 1 Front panel 3 6 0 8 9 1 EARPHONE INPUT 7 AGC 2 INPUT1 3 Automatic gain status indicator volumn control knob 8 LIMITER 3 BASS Pressure limit status indicator Adjustthe bass response clockwise 9 FAULT rotation Increase the bass output Fault indicator whereas reduced 10 POWER SWITCH 4 TREBLE Turnon by press up Turn off by Adjust the treble response clockwise press down rotation Increase the treble output 11 POWER whereas reduced Powerindicator 5 MASTER CONTROL 12 OUTPUT CURRENT Control all the output level Loop output current indicator 6 LOOP INTEGRITY 13 BUILT IN SIGNALLEVEL INDICATOR Full output circuit indicator NOMENCLATURE AND FUNCTIONS VI 3 2 Rear panel 14 15 16 17 1
16. r of parameters into consideration However sometimes there are special situations which make the design and panning ofthe induction loop even more import ant anumber of potential problems and solutions will be discussed later Position Forthe best audio quality and the smallest variationin the magnetic field strength the distance between the induction loop and the listening planemust be between 12 and 15 of the width of the room refer to figure 20 figure 20 For example in a room with a width W of 10M the induction loop should be installed 0 to 0 4 below or 2 4 to 2 8 m above the floor forthe best audio quality and the smallest variation in the magnetic field strength Typically you will install the induction loop in the floor in the ceiling ofa room 17 When the distance between the floor and the induction loopis too small less than 8 of the width ortoo large more than 20 ofthe width refer to figure 20 The figure 21 shows the extra power thatthe loop amplifier needs to make the correct magnetic field The numbers the curves show the distance from the floor to the induction of the width W of the room Wire diameter For the best audio quality the DC direct curr ent resistance ofthe induction loop must be between1 and The DC resistance depends on the wire diameter and the wire length Do as follows 1 Calculate the wire length The wire length depen
17. uids use immediately switch off the power disconnect as doing so may result in fire or electric shock the power supply plug from the AC outlet and contact your nearest ITC dealer Make no further e Use the unit only with the voltage specified on attempt to operate the unit in this condition as this the unit Using a voltage higher than that which may cause fire or electric shock is specified may result in fire or electric shock If you detect smoke or a strange smell coming from the unit Donotcut kink otherwise damage nor modify the If water or any metallic object gets into the unit power supply cord In addition avoid using the If the unit falls or the unit case breaks power cord in close proximity to heaters and never If the power supply cord is damaged exposure place heavy objects including the unit itself on of the core disconnection etc the power cord as doing so may result in fire or If it is malfunctioning no tone sounds electric shock Topreventa fire or electric shock never open nor remove the unit case as there are high voltage components inside the unit Refer all servicing to your nearest ITC dealer e Be sure to replace the unit s terminal cover after connection completion Because high voltage is applied to the speaker terminals never touch these terminals to avoid electric shock Do not place cups bowls or other containers of liquid or metallic objects ontop of the unit If they
18. valid When Priority Select 1 When in vox input1 is priority than input2 and input3 2 In mix input 1 input 2and input 3 mixinput Fire alarm first priority function When in priority inputterminal input 100V fire alam signal source device is first priority level users can adjust Priority volume potentiometer choosethe size of inputsignal Note When the device isin slave status the functionis invalid means no output Faulty output function 1 SUPERVISION is ON FAULT terminal in device normal working status C footand NC foot is in short circuit status when there is faulty in device itis in opened status it means C foot and NC foot is opened 2 SUPERVISION is off in device normal working status FAULT DUANK C foot and NC footis inopened status when there is faulty in device it isin short circuit status itmeans C foot and NC footis short circuit referto figure 11 19 ws Z C i figure 11 Metal compensation function When signal source isin 3KHZ frequency adjust Metal compensation potentiometer it will show treble changes Master and Slave function 1 When Master amp Slave selection is in MASTER the device is inmaster working status it can operate normally 2 When Master amp Slave selection is in SALVE the deviceis in slave working status 3 Whenin slave status these terminals PRIORITYINP

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