Radio Shack 920SR User's Manual
Contents
1. AT 0532 15 AT 0529A 310 2544 1341 AT 0807 auxiliary input transmitter antenna aux out adaptor plug AA rechargeable output cable 3 5mm 2 5mm NiMH batteries 3 5mm dual RCA 15ft 4 6m 51 troubleshooting no FM reception Channel A Channel B indicator does not have green light Verify the transmitter is turned on Verify the frequency number on the trans mitter matches the frequency number on receiver Verify transmitter batteries are charged Verify speaker antenna is connected properly weak sound from speaker Increase volume on the speaker Turn up transmitter volume Make sure AT 0655 boom microphone or other mic is being worn correctly speaker is receiving a signal but no sound is coming out Verify microphone is connected properly to transmitter and is working correctly feedback from speaker Turn down the volume on the transmitter Turn down the volume on the speaker e Make sure the person wearing the transmit ter is not too close to the speaker M ove speaker so that it is facing away from presenter and toward listeners Make sure AT 0655 boom microphone or other mic is being worn correctly 52 troubleshooting cont d speaker does not turn on power indicator does not flash red Verify main power switch on the bottom of the unit isturned on Verify Channel A and Channel B volume control knobs areturned on Verify power supply is plugged secu2. Radium 216MHz La user guide x 920SR speaker ELA 921T body worn transmitter cr y 922T handheld transmitter 923C charging stand iPhonic Ear contents introduction LL 1 understanding sound field 2 setup tipS Li 3 5 daily operating tips 6 8 parts and accessories included with system Li 9 10 920SR column speaker features 11 14 921T body wom transmitter features 15 16 922T handheld transmitter features 17 923C charging stand features 18 system setup and operation 19 28 920SR speaker placement and mounting 29 34 921T body worn transmitter operation 35 40 922T handheld transmitter operation 41 46 aux in connecting to TV CD VCR etc 47 aux out connecting to personal devices 48 49 additional system accessories 50 51 troubleshooting 52 53 Radium channel numbers and corresponding frequencies 54 product specifications 55 57 WalTanly K K K X KR 0 0 KR 0 R 0 R 0 58 60 regulatory approvals and clearances 61 64 introduction Congratulations on the purchase of your new Radium sound field system With proper care and use it will become one of your most valuable classroom educational tools Students will be able to consistently and easily understand the teacher regardless of their locati
3. A performance KA X X Y 75cm 3in 3 15cm 6in max A AT0816 collar mic AT0291 L directional lapel mic performance X X x performance Xx 36 tum power on D Switch power on Check indicator light Continuous green adequate power Continuous red low battery battery life NiMH rechargeable AA 12 hours approx Alkaline disposable AA 15 hours approx WARNING N ever recharge alkaline batteries T his will cause damage to the unit and will void the product warranty adjust transmitter s frequency Use a screwdriver to turn frequency sdector to channel number that match es the channd set on column speaker If using both body worn and hand held transmitters set one transmitter channel to match a Channel A on the speaker column and the other transmitter channel to match a Channel B channd on the speaker column NOTE N ever operate two transmitters on the same channel or interference will result To use two transmitters set the first to match receiver Channel A and the second to match receiver Channel B 38 adjust body worn transmitter volume Increase transmitter volume for greater mic sensitivity and sound clarity lt gt Reduce transmitter volume if feed back occurs activate standby mute mode Activate standby mode to eliminate white noise when not speaking MUTE Standby mode can also be used as a microphone transmitter mute switch T he mute feature allows teachers t
4. units are fully charged ERROR Blinking Amber light charging error Improper batteries have been detected Check your batteries and replace as required O nly NiM H AA batteries can be charged Unit will not charge disposable Alkaline bat teries or N iC ad batteries select channel Use a screwdriver to adjust the Channel A selector on the back of the speaker to match the channel number of either the 921T and or the 922T transmitter s NOTE Consider whether other Radium E asyListener 2 or other radio based active learning systems are in use in the building and set transmitter and receiver channels accordingly Every transmitter in a building should be on its own channel See diagrams in section 12 for guidance 26 9 activate receivers Turn receiver on by turning Channel A and or Channel B volume control knob s to the right Check power indicator light remember that main power must also beon see 2 Flash red once adequate power Continuous red low battery No light battery does not have power and requires recharging or power supply is not connected properly Turn on a921T or 922T transmitter and check FM indicator light s Green receiving FM sgnal 27 setting FM volume Follow steps lt gt or lt 2 gt below to adjust FM volume setting to proper level Two people are needed to set the volume level It is difficult to hear your own voice and make adjustmen
5. with AT0655 boom mic Lexis transmitter as mic a Lexis requires the use of the ATO655R boom mic b may require use of external antenna for better range 389 02 120 02 c set microphone to omni mode Ma d set sensitivity level to HI Phonak Campus S TX5 due to feedback use of extemal boom mic from Phonak is recommended Phonak HandyMic TX3 a built in mic prone to feedback b requires use of external mic which the HandyMic does not accommodate 46 2 6 aux in connecting to TV CD VCR etc connecting speaker to TV CD VCR etc D Using dither the AT 0532 05 or 300 6332 107 adaptor cords connect VCR TV CD computer or other audio source to AUX IN port on top of speaker D Use AUX IN VOLUME control to adjust volume 300 6332 107 NOTE AUX IN can be used simultaneoudy with both Channa A amp B 47 connecting to SoLar s EASY LISTENER SPRITE or other transmitter for rebroadcast of audio to students with hearing impairment Connect AT 0532 05 ft cord to AUX input jack of either SOLARIS EASY LISTENER SPRITE or other trans mitter Connect other end of cable to AUX OUT port on top of speaker aux out connecting to personal FM devices O gt Connect antenna AT 0529A included with transmitter system to Mic Ant jack on transmitter Refer to level setting gide on next page to identify proper level for your transmitter PE571T OR PE300T OR PE 300TS 48 2 8 aux
6. 712 plug in mic for body worn transmitter f l AT0655 shown er NiMH batteries 4 charging stand 923C a channel changer screwdriver 330 3000 101 5 power supply receiver 040 7402 106 22 auxiliary input output cable 6 power supply charging stand a AT0819 a3 auxiliary input cable 3 5mm dual RCA C receiver antenna 300 6332 107 AT0831 10 920SR column speaker features top 11 power low battery and reception status indicator for channel A power switch and volume control for channel A reception status indicator for channel B power switch and volume control for channel B 65 tone control 6 aux input volume control G aux output level switch See page 42 for level setting chart antenna 9 wall mount hole extra antenna hole not used a aux input jack 3 5mm mono a2 aux output jack 3 5mm mono 12 920SR column speaker features front and back 13 3 speaker grille power jack two built in speakers channel selectors 15 intemal rechargeable battery non user removable handle a7 main power on off switch power and charging indicator 14 921T body wom transmitter features front back 15 921T body wom transmitter features cont d top belt clip 2 battery compartment G volume control 4 channel selector 5 microphone input 2 5mm 6 3 position po DH L wer switch FT NIRNZRBT TT o
7. and not near 216 MHz should be tried EDA T his product has been cleared by the U S Food and Drug Administration for use by persons with normal hearing and hearing impairment 64 u s a 800 227 0735 then press 5 e canada 800 263 8700 intemational 45 3917 7101 2005 Phonic Ear Inc Phonic Ear and the names of Phonic Ear products are trademarks or registered trademarks of Phonic Ear Inc in the U S and other countries Product specifications and accessories subject to change without notice 821 7403 101 Rev D 4724 0205
8. ct specifications cont d handheld mic transmitter 922T carrier frequency range frequencies 216 025 216 875M Hz 16 total see chart below charging stand 923C power supply AC adaptor DC 12V 0 5A mic dynamic microphone antenna built in RF output 15mW battery NiMH rechargeable battery alkaline disposable 1 5V x 2 AA battery life NiMH rechargeable 12 hours approx alkaline disposable 15 hours approx recharging time dimensions dia x length 6 hours NiMH batteries 54 x 237 mm 2 1 x 9 3 in weight 2309 8 10z controls on standby off channel selector 57 indicator lights recharging time dimensions wxx weight controls LED green battery ready LED orange recharging LED red poweron LED blinking orange fault battery bad NiMH 1300mA 4 hr 135 x 47 x 230 mm 5 3 x 1 9 x 9 in 360g 12 70z on off switch warranty time period of warranty This warranty will go into effect upon the date of purchase and will stay in effect as long as the instrument remains the property of the orig inal owner EAsyLisTENER 2 VocALIGHT and U NW AVE have a 3 year warranty All other prod ucts have a 1 year warranty what is covered by this warranty Any electronic component which because of work manship manufacturing or design defects fails to function properly under normal use during the life of this warranty will be replaced o
9. ence that may cause undesired operation 61 IMPORTANT NOTE To comply with FCC RF exposure compliance requirements only use sup plied antenna that is sold with this transmitter Use of any other antenna which has not been approved by the manufacturer will violate FCC rules and regulation and void the user s authority to operate this device This device and its antenna s must not be co located or operating in conjunction with any other antenna or transmitter regulatory approvals and clearances cont d receiver part 15 subpart B Radium Receiver Speaker 920SR Tested to comply with FCC Standards FOR HOME OR OFFICE USE T his equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules T hese limits are designed to provide reasonable protection against harmful interference in a resi dential installation T his equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications H owever there is no guar antee that interference will not occur in a particu lar installation If this equipment does cause harmful interference to radio or television recep tion which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Re
10. hannel A 48 Channel A 45 Channel A 47 Channel A 43 Channel B 58 Channel B 55 Channel B 57 Channel B 53 suggested placement of 920SR speaker 30 12b channel mapping placement diagram for multiple system installations single channel 16 rooms total WwW Channel 41 Channel 45 Channel 51 Channel 55 Dona Channel 42 Channel 46 Channel 52 Channel 56 Channel 43 Channel 47 Channel 53 Channel 57 Aemyjey HUHH Channel 44 Channel 48 Channel 54 Channel 58 wall mounting option 1 D Attach brackets to wall Screw mounting bracketsto top and bottom of speaker 13 b mounting on floor stand option 2 lt gt Screw speaker stand into hole on bottom of speaker e Turn clockwise to tighten Turn counter clockwise to loosen AT0823 AT 0824 floor stand is also available 33 seal wall mounting hole if using table stand Place plastic plug into mounting bracket hole on top of speaker to keep out dust 34 1 A 921T body worn transmitter operation plug microphone in D Plug microphone cord into Boom mic cord E mic jack on top of body worn transmitter 35 15 put on microphone and adjust for proper distance from mouth Maximum distance from mic to mouth is 6 in 15cm 3 in 7 5cm is ideal optimum optional cal i AT0655 boom mic two wearing options AT0814 earhook mic performance XA
11. have intentionally not installed them in your equipment install your batteries in your equipment now then charge overnight before initial use see user guide for charging procedure avoid battery corrosion To avoid battery corrosion and damage to your equipment do not recharge disposable or rechargeable alkaline batteries Before charg ing any Phonic Ear equipment make sure only NiMH rechargeable batteries are installed As an added precaution remove batteries if the equipment will not be used for several weeks 60 regulatory approvals and clearances transmitter T his transmitter is authorized by rule under the Low Power Radio Service 47 C F R Part 95 and must not cause harmful interference to TV reception or United States N avy SPASUR installations You do not need an FCC license to operate this transmitter This transmitter may only be used to provide audi tory assistance to persons with disabilities persons who require language translation or persons in edu cational settings health care services to the ill law enforcement tracking services under agreement with a law enforcement agency or automated maritime telecommunications system AM TS network control communications Two way voice communications and all other types of uses not mentioned above are expressly prohibited T his device may not interfere with TV reception or federal government radar and must accept any inter ference received including interfer
12. he lower right side of the speaker can be easily accessed by the teacher Follow the instructions on page 28 for setting the volume at the proper level Never mount the speaker upside down or horizontally The speaker unit must be mounted such that the controls are located at the top of the unit daily operating tips In the morning Turn transmitter power on and put microphone on Turn speaker column power on The speaker should remain plugged into a wall power outlet during the day with the power in the on position Tum power switch to the off position at night after each use The internal battery is not being used while the speaker is plugged into a wall outlet To operate using the internal battery as a portable system simply unplug the speaker before use and plug back in after use making sure you retum power switch to off position while plugged in and charging The battery takes 6 hours to reach a full charge at full charge the speaker column battery will last up to 8 hours unplugged In the evening after each use Turn transmitter power off and place it back onto the charging stand confirm that the charge indicator light illuminates Transmitters not in use should always be placed on the charging stand this is their home base station Turn speaker column power off Leave speaker plugged into wall power outlet but confirm that the power has been tumed off da
13. ies persons who require language translation or persons in educational settings health care services to the ill law enforcement tracking service under agreement with a law enforcement agency or automated maritime telecommunication system AM TS network control communications Two way voice commu nications and all other types of uses not men tioned above are expressly prohibited regulatory approvals and clearances cont d This device may not cause interference and must accept any interference received including inter ference that may cause undesired operation T hese devices may not interfere with TV recep tion or Federal Government radar IC notes This Class B digital apparatus complies with Canadian IC ES 003 Cet appareil num rique de la classe B est conforme a la norme N M B 003 du Canada Theterm IC before the radio certification number only signifies that Industry of Canada technical specifications were met If TV channel 13 is used in the area the installer shall reduce or adjust the RF radiated power so that near by TV channel 13 receivers do not receive radio interference from the system installed Suggestions A test with aTV receiver equipped with rabbit ear antenna and tuned to channel 13 should be conducted at the perimeter of the users intended coverage area and not over lapping other user s areas without the latter s consent If this does not solve the problem a channel near the 217 M Hz edge
14. ily operating tips cont d Battery care and maintenance tips The speaker battery will last approximately 2 years depending on usage When not in use leave speaker plugged into wall outlet with power switch in off position Keep speaker away from heating units use store in a cool dry place When using speaker battery power unplugged from wall always remember to retum power switch to off position after use Never mount use speaker horizontally or upside down Controls should be accessible from top of unit Plan on buying new NiMH batteries for your transmitter every 12 months Alkaline batteries can also be used as back ups however the 923C charger will not recharge alkaline batteries Never attempt to recharge alkaline batteries this will cause damage to the unit and void the product warranty Remember to charge all batteries overnight before initial use daily operating tips cont d Do not coil the microphone since it also acts as your antenna coiling or wrapping the cord will affect its range and may also reduce its life Speak at a normal level the system is projecting your voice for you parts and accessories included with system Ue Ot Orn o Du A k E Om OA gt column speaker receiver speaker table stand 920SR AT0823 or body wom transmitter wall mounting bracket set of 2 9211 AT0820 and or handheld transmitter elastic belt 13227 AT0
15. n standby off mute 7 power and low battery indicator light 16 922T handheld microphone features LED indicator light 2 3 position power switch on standby off mute G channel selector 4 battery compartment 5 channel selector key inside battery compartment 923C charging stand features front power indicator pocket 1 charging indicator MESSER HOO 4 GI G pocket 1 full charge indicator pocket 2 charging indicator pocket 2 full charge indicator back 6 power switch SE DC power socket 18 1 system setup and operation attach antenna D Attach antenna to top of speaker Turn metal base of antenna clock wise until secured tightly do not over tighten 19 tum on main power NOTE Light is not illuminated during normal battery operation if using wall outlet Plug power supply into power charging socket Plug power supply into wall socket gt Turn speaker on if using already charged battery gt Turn speaker on NOTE Battery operating time is 5 8 hours 20 charge battery Red light charging Flashing red green equal duration 80 90 charged Long flash green short flash red fully charged NOTE Light is not illuminated during normal battery operation 21 charge nightly after every use Plug power supply into power charging socket lt gt Plug power supply into wall socket Recharging time is 8 ho
16. nty N o representative or person is authorized to represent or assume for us any liability in connection with the sale or use of our prod ucts other than as set forth above what to do if you have questions If you have any questions about service call the service department at 800 227 0735 then press 7 59 what to do if you need service If you require service under the warrenty terms obtain a service order form dither online at www phonicear com support asp or through our U S customer service department at 800 227 0735 then press 5 or 1 707 769 1110 outside the U S Fill the form out completely remembering to include 1 Description of the problem 2 Your billing address 3 Your shipping address if different from billing address 4 Contact name and phone number 5 A P O number if the equipment is not under a warranty or service contract warranty cont d Then carefully package the equipment in the original shipping container to prevent damage and send it postpaid to the service center near you USA International Phonic Ear Inc 3880 Cypress Drive Petaluma CA 94954 7600 U S A In Canada Phonic Ear Ltd 10 7475 Kimbel Street Mississauga Ontario L5S 1E7 Canada what to do if you have questions If you have any questions about service call the service department at 800 227 0735 then press 7 about your batteries To ensure that your batteries are as fresh as possible upon arrival we
17. o have a private conversation without needing to turn the transmitter off 40 2 0 922T handheld transmitter operation tum power on Turn power on by pushing power switch up 41 check indicator light Check indicator light Continuous green adequate power Continuous red low battery battery life NiMH rechargeableAA 12 hours approx Alkaline digposableAA 15 hours approx WARNING N ever recharge alkaline batteries T his will cause damage to the unit and will void the product warranty 42 remove channel adjustment key O pen battery compartment door and remove batteries gt Remove channd adjustment key adjust transmitter channel to match receiver channel Using adjustment key turn channel frequency sdector to channd number that matches the channel set on column speaker NOTE N ever operate two transmitters on the same channel or interference will result To use two transmitters set the first to match receiver Channel A and the second to match receiver Channel B 44 standby mode Activate standby modeto mute voice and diminate white noise when not speaking 2 5 transmitters that can be used with 920SR receiver speaker XXX X most compatible X least compatible transmitter 921T Radium compatible performance accessory no adaptor s cord required rating needed Vv comments 922T Radium 330T EasyListener 2 300TS 216 Sprite best when used
18. on in the classroom or competing internal or external background noise Teachers can now speak all day in their normal voice without having to raise their voice to get their students attention Numerous studies show that classrooms using sound field enjoy better student comprehen sion increased student participation better grades and fewer behavioral referrals Read this manual carefully to become familiar with your system and to get the most out of its many features and options understanding sound field and its benefits without sound field distance noise echo with sound field setup tips IMPORTANT Be sure you place your Radium speaker and transmitter units on their charger overnight for a minimum of 12 hours before tuming the power on and or using them for the first time Failing to do so can reduce battery capacity Basic setup tips First Identify a front comer of the room the location from where the teacher normally teaches Second Take a good look around paying close attention to power outlet and other electronic equipment locations Ideally the speaker should x be placed at a 5 foot distance from other elec tronic equipment such as computers or radios diagram 1 Third Determine whether to mount the speaker on the wall as shown in diagram 1 or place it on a sturdy surface using the T bar table 3 setup tips cont d mount stand in diagram 2 In either case diagram 2
19. orient or relocate the receiving antenna Increase the separation between the equipment and receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected e Consult the dealer or an experienced radio TV technician for help 62 regulatory approvals and clearances cont d FCC notes The Radium sound field system is approved by the FCC Federal Communications Commission The use of the system may be governed by specific FCC rules and FCC licensing or notifications may be required Consult your local FCC office for detailed information Phonic Ear FM receivers and FM transmitters when required are approved by the Federal Communications Commission FCC in the U S and Industry Canada Other government approvals are available upon request O ther inter national regulations may also apply Any changes or modifications made to any gov ernment approved element of this instrument without the express approval of Phonic Ear Inc in writing could void the user s authority to operate those elements of the system 63 Part 95 T his transmitter is authorized by rule under the Low Power Radio Service 47 CFR Part 95 and must not cause harmful interference to TV recep tion or United States N avy SPASUR installa tions You do not need an FCC license to oper ate this transmitter T his transmitter may only be used to provide auditory assistance to persons with disabilit
20. out transmitter compatibility chart and level setting guide NOTE Common transmitters and recommended leve settings are shown below Because the level setting is universal other transmitters not listed below may be used as wall simply set the aux out leva to the postion at which the receiver wearer hears a strong distortion free signal product name part aux in jack size aux out level setting Easy Listener 300T Sprite 300TS Sprite 300TS 216 Solaris 571T Lexis 871T transmitter Phonak Campus S TX5 Phonak HandyMic TX3 Phonak MicroVox TX2 For transmitters with a 3 5mm jack size simply attach the transmitter to the AT0805 aux out accessory cord For 2 5mm products use the aux out adapter plug 310 2544 1341 ED T Requires special adaptor cord provided by Phonak P N 52117 and Radio Shack adaptor P N 274387 49 additional system accessories microphone options Ra he DD ns e lt e vun AT 0655 AT0814 AT 0816 AT0291 L behind the neck earhook microphone FM collar microphone directional microphone boom microphone with mute switch with lavalier cord receiver accessories oft er dC AT 0820 AT 0823 AT 0824 AT 0822 wall mounting bracket speaker table stand speaker floor stand carrying bag set of 2 AT 0801 aux box adds four additional audio inpu s 50 additional system accessories cont d transmitter accessories
21. r repaired at no charge for parts or labor when returned to the factory service center Transportation in is paid by the cus tomer If it is determined that repair is not feasible the entire unit may bereplaced with an equiv alent unit upon mutual agreement of the manufacturer and customer what is not covered by this warranty T his limited warranty does not apply to 1 Malfunctions resulting from abuse neglect or accident 2 Instruments connected installed used or adjusted in any manner contrary to instructions provided by the manufacturer 3 Consequential damages and damages resulting from delay or loss of this instrument T he exclu sive remedy under this warranty is strictly limited to repair or replacement as herein provided 4 Products damaged in transit unless investigated by the shipper and returned to the warrantor with the investigation report 5 Peripheral accessories as itemized within the product specification sheet as applicable when such items are not returned within 1 year from original purchase 6 Batteries if applicable 58 warranty cont d Phonic Ear Inc reserves the right to make changes in the design or construction of any of its instruments at any time without incurring any obligation to make any changes whatsoever on units previously purchased This warranty isin lieu of all other expressed warranties All expressed and implied warranties will teminateupon the expiration of this written warra
22. rely into speaker and wall socket Verify wall socket works speaker battery does not charge Connect power supply to speaker and charge for four hours If speaker battery does not hold a charge send the unit to Phonic Ear Service department for replace ment battery must be replaced after one year of continuous use 53 speaker is picking up FM interference or hum e Check to make sure no other wireless sys tems are operating on similar frequencies Check to make sure the system is not placed too close to a computer e Check to make sure metal objects are not placed too close to transmitter or speaker i e jewelry metal shelves amber charge light is flashing when attempt to charge my transmitter e Replace your batteries with a set of new NiMH cells AT 0807 Radium channel numbers and corresponding frequencies Channel Channel A Channel Channel B 216 025 MHz 216 525MHz 216 075MHz 216 575MHz 216 125MHz 216 625MHz 216 175MHz 216 675MHz 216 225MHz 216 725MHz 216 275MHz 216 775MHz 216 325MHz 216 825MHz 216 375MHz 216 875MHz 54 product specifications two channel column speaker 920SR carrier frequency range frequencies 216 025 216 875M Hz 16 total dimensions wxHxp 100 x 660 x 145 mm 3 9 x 26 x 5 7 in modulation FM F3E output power maximum 36W 4Q x2 weight recharging time 5kg 11lbs 8 hours for initial charging 4 7 hours for recharging po
23. the speaker should be placed at a height of 3 feet 1 meter from the floor or at level closest to the listener s ears Fourth Consider whether other Radium EasyListener 2 or other radio based active leaming systems are in use in the building and set transmitter and receiver channels accordingly Every transmitter in a building should be on its own channel See diagrams in section 12 for guidance If placing the speaker on a table or surface top consider the following Choose a location that provides easy access for the teacher and is out of the way of students and main traffic areas The speaker should be placed at least 6 feet 1 8 meters away from where the teacher stands setup tips cont d Choose a table or surface top that is sturdy Make sure the table or cabinet is structurally solid sturdy and out of the way of foot traffic Properly mount and securely fasten the T bar speaker stand onto the bottom of the speaker Make sure the stand is screwed on tightly and that the speaker does not wobble when in an upright position If mounting on the wall consider the following The power supply cord needs to reach the wall outlet Make sure the power supply is within reach of the speaker from its wall mounted position The teacher should be able to reach the controls located on top of the speaker once it s mounted Once the volume is set at a comfortable level the speaker power switch located on t
24. ts to it NOTE The average volume setting isin the 11 00 position see photo but may change depending on room acoustics and noise level With a sound level meter Take a level reading in the A setting in the center of the room during normal classroom activity and another reading of the teacher s amplified voice without the class activity The level of the teacher s voice should be set between 10 15 decibels above room noise leva Without a sound level meter First ask someone other than yourself if you are the teacher to listen to the amplified voice and make volume adjustments An ideal volume level is achieved when the listener can hear the amplified voice at a comfortable leva and the vol ume leve from the speaker and teacher s mouth is comparable If you can hear yourself through the loudspeakers the volume setting may be too high and should be decreased 1 1 920SR speaker placement and mounting speaker positioning Place speaker in acorner of theroom facing listeners M ount speaker on wall using brack amp s or place speaker on a surface using a speaker stand The bottom of the speaker should be about 1 meter 3 feet from the floor See setup tips on page 3 channel mapping placement diagram for multiple system installations double channel 8 rooms total Channel A 44 Channel A 41 Channel A 46 Channel A 42 Channel B 54 Channel B 51 Channel B 56 Channel B 52 hallway ut C
25. urs if the battery is completely discharged and 4 to 7 hours if battery is only partially discharged NOTE Battery operating timeis 5 8 hours 4 insert batteries in body wom transmitter lt gt Switch power off Remove battery cover push and dide off Insert two AA rechargeable NiMH batteries WARNING N ever recharge alkaline batteries T his will cause damage to the unit and will void the product warranty 22 insert batteries in handheld microphone lt gt Switch power off AA Rechargeable SE NiMH batteries Remove battery cover turn counter clockwise Insert two AA rechargeable NiMH batteries WARNING N ever recharge alkaline batteries T his will cause damage to the unit and will void the product warranty 23 charge transmitter s Never attempt to recharge alkaline batteries This will cause damage to the unit and will void the product warranty Plug power supply into power jack h k in charger bac D B D on back of charger stand lt gt Plug power supply AT 0819 into wall socket gt Turn charger on D Turn transmitters off while charging charger front gt W hen green charge ready indicator lights the transmitter batteries are full charged and ready to go 4 to 5 hours 24 wait until green charge indicators light 4 5 hours 25 D gt PWR Red light charge is turned on CHARGING Amber light units are being charged READY Green light
26. wer requirements frequency response 110V 240V AC adaptor 15V DC 2A Battery 12V 2 7A rechargeable sealed lead acid 1 1 5 year life with continuous usage 100H z 9kHz battery operating time 5 8 hours continuous operation speaker stand optional table stand AT 0823 floor stand AT 0824 or wall brackets AT 0820 total harmonic distortion 2 de emphasis 75S system signal to noise ratio gt 65 dB at rated output squelch RSSI inputs AUX x1 power amp charge output AUX x 1 High 700 mV Low 100mV controls 55 tone channd A amp channd B power volume aux volume high low output master power channd sdector product specifications cont d body worn transmitter 921T carrier frequency range 216 025 216 875M Hz battery NiMH rechargeable 1600mA frequencies 16 total alkaline disposable 2AA modulation FM F3E battery life NiMH rechargeable 12 hours approx total harmonic distortion lt 1 5 alkaline disposable 15 hours approx frequency response 50H zto 12KHz recharging time 6 hours frequency stability 0005 maximum modulation 25KH z with leve limiting pre emphasis 75us dynamic range 100dB operating range gt 34m 110ft dimensions WxHxD 65x90x25mm 25x35x1in weight 519 1 80z controls on standby off channd selector volume inputs outputs 2 5mm microphone input jack 56 produ
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