MANUAL: LT-800 Stationary RF Transmitter
Contents
1. 51 5 29 H 10 3 J 2165375 3K J 2 62 2165625 MU 23 23 J 2165750 2 52 2 52 1 1 12 2165875 sk 2 oa C24 Nad 2166125 IM 5 65 2166250 2M 53 3 58838 J 12 II 2166375 3M 2 81 f y 2166625 IN 2 82 2166750 2N 54 54 54 kK 13 1 2166875 3N 8 68 LI TI 2167125 IP eT 2167250 2P 5 55 55 L 14 l9 TI 2167375 3P_ 30 88 LI TI 216 7625 IR 3a 84 JJ 216 7750 2R 56 56 56 15 4 Wideband frequencies are indicated 2167875 3R_ 32 72 C32 N72 in highlighted rows The highlighted 2168125 is 3 73 SS channels also indicated those channels 2168250 28 57 5 57 13 J available in the basic mode default 2168375 38 A 76 Al channels can be accessed when in 2168625 11 35 8 the expanded channel mode see page 2168750 aro 58 58 58 9 amp formore information 2168875 31 36 86 TI 21691285 WW 37 77 ESI N77 2169250 20 5 5 89 17 ft 2169375 3U J 28 88 J J 2169625 W 39 73 8 2169750 2 60 60 5 y O 2169875 3v 40 80 C 0 N80 Wideband frequencies in highlighted rows N 9 c O 2 9 o E O2. Li len User s Manual wwww stentech com l DEUT LEVELE H Mix LEVEL CONTOUR CHANNEL ERLE LT 800 072 Stationary FM Transmitter LT 800 216 Stationary FM Transmitter niss a single sound Dear Valued Customer Thank you for choosing Listen All of us at Listen are dedicated to providing you with the highest quality products available We take great pride in their outstanding performance because we care that you are completely satisfied That s why we independently certify them to the highest quality standards and back them with a limited lifetime guarantee We stand ready to answer any questions you might have during installation or in the operation of our products Should you experience any problems whatsoever with your Listen products we are ready to help you in any way we can with prompt efficient customer care Because at Listen it s all about you And should you have any comments on how we might improve our products or our service we re here to listen Here s how to reach us 1 801 233 8992 1 800 330 089 North America 1 801 233 8995 fax support listentech com www listentech com Thank you and enjoy your listening experience Best regards Russell Gentner and the Listen Team e In the few instances where repairs were needed 99 of all clients indicated that they were happy with repair turn around times and 85 of the time clients were without their product for less than 10 days Overal
3. Optional rack mount LA 326 Rack Mounting Temperature Operation 10 C 14 F to 40 C 104 F Environmental Temperature Storage 20 C 4 F to 50 C 122 F 0 to 95 Relative Humidity non condensing Specifications are subject to change without notification LT 800 Block Diagram POWER on 90 Off Red x Leo TR 3 5MM Stereo CHANNEL SELECT Lei 115VAC6 O O A E 0 HZ E Up de provided 15VAC 1A O HEADPHONE 2 Power Supply O V N 2 Down CPU Module O G d Volume Listen LCD Display Backlighted MIK Level Top Mounted VU Meter Compression Ratio Antenna Stud internal adjustment Remote 6 Antenna Connection Transmitter RF Board Pre emphasis SQ Processing O Compandin BNC H 9 ANTENNA Green gt Green e MIK LEVEL e RF POWER SQ CONTOUR PROCESS Input 1 VU Input 2 VU Meter Meter 12VDC PA SE SEENEN Input 1 Level Select Mic Phantom Pwr Mic Line Mic AN Line ic M Input 2 Level Select IA dinin 10dBu 10dBu y Y N 10dBu 10dBu Front Panel IN AN u AN Female XLR 1 4 Combo Connect Phono Phono DO 2 Tip 3 Ring 1 Sleeve 0 400Hz INPUT 1 INPUT 2 MIX OUTPUT TEST TONE LT 800 Quick Reference LT 800 Front Panel Controls amp Displays Top mount antenna connection Remove rubber plug and screw Indicates antenna in place Process Mode is active Indicates audio input Indicates LCD Shows level of Input 1 and Super Quiet which channel Monitor Por
4. COM mi a GE L 50 Ohms 12 VDC LINE MIC PH PWR MIC d Set RF Power level here Select Line Mic or Mic Phantom Input 2 Connect Power Line is balanced 0 dBu VA on an Me unbalanced audio to these input level Mic is 55dBu 12VDC page Ter SOS Jev power supply phono connectors input supplied in PH Power position ANC AR PIO ERREECHEN level 10dBu or 10dBu If not using input 1 leave in line position LT 800 Setup Instructions Unpack the Product Remove outer packaging and plastic cover Inspect for physical damage Mount in Rack if necessary If rack mounting the unit install the optional rack mount kit part LA 326 according to the instructions included with the kit then install the LT 800 in the rack NOTE If rack mounting you will need to use a rear connection antenna RTT Mies D pement son E si u Oo Listen pi S TN SR On oO PT A EES u O Y JE GC 9 7 San Bu Rack Mount with single unit installed Rack Mount with dual unit installed Shown with LT 800 Connect Antenna Connect the antenna not included according to the installation instructions Only use an antenna supplied by Listen If you are connecting the antenna directly to the top of the LT 800 you will need to remove the rubber plug on top of the unit If you are using a remote antenna connected to the rear of the unit do not connect an antenna to the top
5. O 16 Phonak Frequency Charf Freguency MHz Listen Phonak 216 012 1A 1 216 025 2A 4 216 037 3A 2 216 062 1B 21 216 075 2B 42 216 088 3B 4 216 113 1C 5 216 125 2C 43 216 137 3C 22 216 162 1D 23 216 175 2D 44 216 188 3D 8 216 213 1E 9 216 225 2E 45 216 238 3E 24 216 262 IF 25 216 275 2F 46 216 287 3F 12 216 312 1G 13 216 325 2G 47 216 338 3G 26 216 363 IH 27 218 375 2H 48 216 387 3H 16 216 412 1J 17 216 425 2J 49 216 438 3J 18 216 512 1K 61 216 525 2K 29 216 537 3K 62 216 562 IL 28 216 575 2L 52 216 588 3L 64 216 613 IM 65 216 625 2M 53 216 637 SM 81 216 662 IN 82 216 675 2N 54 216 688 3N 68 216 713 Ir 69 218 725 2P 55 216 738 3P 83 216 762 IR 84 216 775 2R 56 216 787 3R 72 216 812 15 73 216 825 25 57 216 838 35 76 216 863 17 85 216 875 27 58 216 887 3T 86 216 912 1U 77 216 925 2U 59 216 938 3U 88 216 963 1V 79 216 975 2V 60 216 988 3V 80 Wideband frequencies are indicated in highlighted rows The highlighted channels also indicated those channels available in the basic mode default All channels can be accessed when in the expanded channel mode see page 8 for more information 17 0 Q 2 D Q o lt 0 o a LT 800 Troubleshooting Troubleshooting The LT 800 has no pow
6. The adjacent channel transmitter on channel D should be at least 150 feet away It is highly recommended that after channel selection has been achieved you lock the channel so that it cannot be changed by the user TO accomplish LOCK on the LT 800 press the UP button for 3 seconds Repeat the process to unlock Notes in regard to using 72 MHz and 216 MHz systems 1 72 MHz is a secondary frequency band This means that other transmitters are licensed to use these frequencies Thus you may experience interference from paging transmitters and other types of transmissions You will need to find a clear channel by listening to all the wide band channels 2 216 MHz is a primary frequency band and no other types of transmissions are authorized to use it Thus you will find the highest probability of clear channels in this band However you may experience intermodulation of the TV Channel 13 aural carrier if there is a channel 13 transmitter in your area and you are close to the transmitter If you cannot find a clear channel in 216 MHz band due to channel 13 it is recommended that you switch to a 72 MHz system Wide Band Recommendation Listen recommends that you always use a wide band channel unless you need to be compatible with existing narrow band receivers from other manufacturers Wide band channels have lower noise than their narrow band counterparts At 72MHz The LT 800 at 72 MHz operates on 17 wide band channels and 40
7. connector See page 22 for antenna options or refer to the Listen website for remote antenna 4 eg options www listentech com 9 D mmm Cc D S n p 0 a Q gt o Coax antenna connection Rear of LT 800 shown LA 122 Remote Antenna See RF Reception Maximization Strategies and Coaxial Cable on e ze SC aR ig bber pl ao rubber plug LT 800 shown with top mount antenna connected through top of unit part numbers LA 101 LA 106 72 MHz or LA 102 216 MHz Connect Power Plug the power supply into the power connector on the back panel then plug the power supply into an outlet Only use a Listen approved power supply The LA 207 an in line switching power supply is the approved power supply for this ANTENNA POWER MIX INPUT Select Phonak Compatibility if necessary If you will be using Phonak receivers with your LT 800 216 MHz only the transmitter can become completely compatible through software control When switched to this mode the LT 800 transmitter will display the Phonak channels By integrating Phonak channels and compatibility into the LT 800 216 it is more convenient to use Phonak receivers with Listen transmitters www phonak com LT 800 Setup Instructions cont To Select Phonak Mode Press and hold down the channel select up button while powering on the unit The LC
8. equipment Warranty amp Contacting Listen Listen Technologies Corporation Listen warrants its transmitters and receivers LT 82 LT 700 LT 800 LR 100 LR 42 LR 44 LR 300 LR 400 LR 500 LR 600 to be free from defects in workmanship and material under normal use and conditions for the useful lifetime of the product from date of purchase Listen warrants its Stationary IR Radiators LA 140 to be free from defects in workmanship and material under normal use and conditions for three years from the date of purchase Listen warrants its Noise Canceling Microphone LA 270 to be free from defects in workmanship and material under normal use and conditions for one year from date of purchase Listen warrants its Charging Carrying Cases LA 306 LA 311 LA 313 LA 317 LA 318 LA 319 LA 320 LA 321 LA 322 LA 323 LA 324 LA 325 to be free from defects in workmanship and material under normal use and conditions for one year from date of purchase All other products and accessories are warranted for 90 days from date of purchase This warranty is only available to the original end purchaser of the product and cannot be transterred Warranty is only valid if warranty card has been returned within 90 days of purchase This warranty is void if damage occurred because of misuse or if the product has been repaired or modified by anyone other than a factory authorized service technician Warranty does not cover normal wear and tear on the produ
9. gt N LT 800 Specifications Architectural Specifications The stationary FM transmitter shall be capable of broadcasting on 57 channels The transmitter shall have a SNR of 80aB or greater The output power shall be adjustable to quarter half or full Channel tuning shall be capable of being locked The device shall broadcast on both wide and narrow band channels The device shall have an audio frequency response of 63 Hz to 15k Hz 3dB at 72 MHz or of 63 Hz to 10k Hz 3dB at 216 MHz It shall have two mixing audio inputs The device shall have the following audio controls input level mix level and an adjustable low pass filter The device shall have an audio processor that is capable of automatic gain control and limiting The Listen LT 800 is specified Va E 2 Ka o U U 0 o Specification Specifications LT 800 072 LT 800 216 005 stability 32 to 122 F 0 50 C m 50 PPM All system specifications are wireless end to end System Frequency Response 50 Hz 15 kHz 3 dB 50 Hz 10 kHz 3 dB System Signal to Noise Ratio 3 A Weighted 80 dB SQ enabled 60 dB SQ disabled 80 dB SQ enabled 50 dB SQ disabled lt 2 total harmonic distortion THD at 80 deviation Audio Audio Input 1 Rear panel 1 Female XLR and 1 4 in combo connector balanced 0 55 dBu line mic nominal input level adjustable P 30 21 dBu line mic maximum input level impedance 20k 1k Ohms l
10. holding the channel select UP button for 3 seconds Consider removing the Inout Mix Level and Contour knobs You can order a rack mount kit from Listen which offers a security cover that will limit access to the unit lam using other manufacturers receivers and the sound is distorted The receiver is probably not designed to handle the 25 kHz deviation of the Listen transmitter This can be corrected by turning the Mix Level knob down Another possibility is that you have enabled the SQ function of the LT 800 and this feature is not available in other companies products You will need to disable SQ in this event see page 8 If you are using Phonak receivers the transmitter is capable of operating in the Phonak mode please refer to page 8 Several transmitters are operating in the same environment For this you ll need to choose your transmitting frequencies carefully See page 15 17 for more details Can have two antennas connected to my transmitter No The LT 800 transmitter can use only one antenna connection at a time You may connect either a top mount antenna through the top antenna port or a remote antenna connected to the BNC connection on the rear of the unit If multiple antennae are simultaneously connected to both ports the transmitter will have extremely poor broadcast performance and range Compliance Notice amp FCC Statement Compliance Notice This device complies with part 15 of the FCC Rules Operation is
11. narrow band channels Letters Wide Band Channels Example E Numbers Narrow Band Channels Example 32 At 216MHz The LT 800 at 216 MHz operates on 19 wide band channels and 38 nar row band channels 2 as left digit Wide Band Channel Example 2C 1 and 3 as left digits Narrow Band Channels Examples 1A 3R 72 MHz Compatibility Chart 72510 u u esi II a juan o I JoJjotm reso u a mi 4 i na TT Tam ask E nana 16 16 e o 63m SR mmm RR CECR rao 7 vw SL Pr ERIC mao e wt nsa Te e 1 aes ran E e TE TE emah ee na o e RSC ean E SE 9 PIPL er Ko erg d Kg pr alale alaa daja Sa len S S E G aa Pa EA PA PRA Pa Pa Fa Padha bs GE EE EE S EE EEN VUE NANA E ei Nell e e t T m _ B A LN WR Ss 5 AL b I F EE a B WG A P AL H 0 A R ll F F _ a a 3a LR A 5 3 S EA A NW TTT el ajaja o R R K k Hi ai s Pa rr a apa paa pp A LO LOL LS LS LC band f i dicated iy hichianied aro a TS TS TSTST Wideband frequencies are indicated in highlighted rows e n 1 1 1 1 tam a m a The highlighted channels also indicated those channels RO 2 2 E arn II available in the basic mode default All channels can aa D 5 be accessed when in the expanded channel mode
12. see ara L AA ES NA AA o Ea PO PE page 8 for more information 75 O fe 3 D Q o lt O gt Q a Se E m ak Parenthesis indicate T35 and T20 narrowband an E JH HH HH dT Il I Tao 3 Es 207 216 MHz Compatibility Chart Frequency Phonic Light MHZ Listen Ear Comtek Phonak Wiliams Gentner CSI AVR Speed 2160125 JA J 1 1 Soo 2160250 2A 4 41 4 1 1 2160375 3A J 2 2 2160625 18 J 3 a 2160750 2B 42 42 42 J 2 lo 2160875 3B 4 4 2161125 1C 5 5 HT 216 1250 2 4 43 4 A 3 6 TI 2161375 3C 6 2 2161625 1D 7 123 216 1750 2D 4 4 4 B 4 14 2161875 3D 8 8 2162125 1E 9 9 CURT N 216 2250 Ji 45 45 4 C 5 2 J 2162375 3E 10 24 II 2162625 IF II 2162750 2F 46 46 46 D 6 MW fT ft 2162875 3F J J 12 12 f CR N2 216 3125 1G B 138 2163250 26 47 4 4 E 7 7 2163375 3e 14 26 S 2163625 IH 15 27 TI 2163750 H 48 48 48 F 8 1 2163875 3H 16 16 CIR NB 2164125 Y 17 17 cap E 2164250 Y 49 49 4 G 9 18 2164375 3Y 18 18 LL S 21651285 1K 23a J pp II 2165250 2K
13. D will display a P momentarily upon power up indicating that the transmitter is in the Phonak Channel Mode The channels displayed will now match Phonak channels To return to the Listen channel designations repeat this process The LCD will display an L momentarily upon power up indicating that you are in the Listen Channel Mode INPUT 1 TEST TONE Select Channel Mode if necessary Your transmitter has been shipped to you with only a limited number of channels available Basic Mode If all channels Expanded Mode are required use the following procedure To Select Expanded Mode To enable or disable the Expanded Mode press and hold the channel select down button while powering on the unit When the Basic Mode is enabled L O lockout will be displayed on the LCD display as shown below This indicator is extinguished when in the Expanded Mode 7 E 9 Ke Y Q 0 G 722 Set SQ Super Quiet and Process Features Your transmitter is shipped to you with SQ super quiet enabled and Process disabled For a detailed description of these features and when to use them please refer to page 12 To Disable or Enable SQ and Process Features With the unit on press and hold the channel select Down button for 8 seconds The program PGM icon will appear on the LCD Once in the program mode the SQ and Process featurs can be turned on an
14. age they are conveying Basic and Expanded Mode In the default Listen channel mode only the most commonly used channels are available This is called Basic Mode When the LT 800 is in Basic Mode L O lock out will be displayed on the LCD meaning some transmission channels are unavailable If the channel needed is not available in Basic Mode access to all transmission channels is achieved in Expanded Mode To access Expanded Mode press and hold the channel select down button while powering on the unit To return to Basic Mode repeat the same process of powering on the unit while holding the down button SQ Summary e SQ is NOT squelch e SQ improves noise performance by at least 20dB e SQ is NOT compatible with older version Listen products e SQ is NOT compatible with other manufacturers products e To work properly SQ must be enabled for both the transmitter and receivers SQ can be disabled to permit operation with older Listen products or other manufacturers products RF Reception Maximization Strategies For proper and dependable operation Listen receivers need to receive a strong and consistent signal from the originating transmitter Note that on portable receivers the headset wire is the receiving antenna The following strategies should be used maximize this signal at When designing and installing your system keep in mind that the location of both the transmitti
15. arters are located in Bluffdale Utah U S A and are open Monday through Friday 8am to 50m Mountain Time 14912 Heritage Crest Way Bluffdale Utah 84065 4818 1 801 233 8992 1 800 330 0891 North America 1 801 233 8995 fax support listentech com www listentech com Optional Accessories Antenna Accessories LA 101 LA 102 LA 106 Helical Top Mounted Antenna Telescoping Top Mounted Telescoping Top Mounted 72 MHz Antenna 216 MHz Antenna 72 MHz LA 107 LA 123 Ground Plane Remote Antenna LA 122 90 Helical Antenna 216 MHz Universal Antenna Kit 72 MHz The single solution for all of your indoor remote antenna needs Includes 72 and 216 MHz raen components flekible and rigid i dipoles and monopole radials hardware for multiple mount ing configurations and 25 feet 7 6m of RG 58 coax cable 216 MZ LA 124 90 Helical Antenna LT 800 Rack Mount Accessories ad LA 125 72 MHz and LA 126 216 MHz LA 326 Antenna Kit for Rack Mount Universal Rack Mounting Kit Includes components for single and dual rack configuration and a security cover NOTE Rack mounted units cannot use the LA 106 LA 102 or LA 101 top mounted antenna Optional Accessories cont Cable amp Connectors Accessories LA 112 RG 58 50 Ohm Coaxial Cable per ft RG 8 BNC Connector LA 261 Lavalier Microphone LA 277 Conferencing Microphone LA 276 Collar Microphone NOTE To use Listen micr
16. ct or any other physical damage unless the damage was the result of a manufacturing detect Listen is not liable for consequential damages due to any failure of equipment to perform as intended Listen shall bear no responsibility or obligation with respect to the manner of use of any equipment sold by it Listen specifically disclaims and negates any warranty of merchantability or fitness of use of such equipment including without limitation any warranty that the use of such equipment for any purpose will comply with applicable laws and regulations The terms of the warranty are governed by the laws of the state of Utah In the first ninety days after purchase any detective product will be replaced with a new unit After 90 days Listen will at its own discretion either repair or replace transmitters and receivers with a new unit or a unit of similar type and condition Product that is not covered under warranty shall be repaired or replaced with a unit of similar type and condition based on a flat fee Contact Listen for details This limited warranty prices and the specifications of products are subject to change without notice Contacting Listen If technical service is needed please contact Listen Pre authorization is required before returning Listen products If products were damaged in shipment please contact the carrier then contact Listen for replacement or repair requirements payable by the carrier Listen s corporate headqu
17. d off by pressing the channel select buttons Press the channel select Up button to toggle between Process On and Off Press the channel select Down button to toggle between SQ On and Off LED lit when Process is enabled If the green LED is illuminated on the front panel that feature is enabled Once you have enabled or LED lit when isten L disabled the features as desired let the transmitter San A CHANNEL SELE exit the program mode by waiting 5 seconds LT 800 Setup Instructions cont Set RF Power Set the RFPOWER switch on the back of the unit to Full 1 2 or 1 4 Level is indicated on the LCD display The amount of transmitted RF power that you willneed depends on your application If you are operating multiple transmitters in the same environment it is best to set the transmitters output power to its lowest level to reduce the possibility of interference ES Connect Audio Inputs The LT 800 has two audio input options Input 1 and Input 2 Input 1 is a balanced connection using either an XLR or 1 4 phono connector Input 2 has two unbalanced mixing phono connectors Use Input if you are using a microphone or if you have a balanced connection such as from a professional audio mixer you can also use Input 1 for unbalanced connections Use Input 2 to connect to an unbalanced audio source Input 1 Connect the audio source s to one or both audio input connecti
18. eduction technology called ListenSQ Both the transmitter and receiver must have the SQ feature enabled to achieve the desired results SQ is available on new Listen systems including the system you received in this shipment If you are planning to use this product with older Listen systems that do not have Listen SQ or equipment not manufactured by Listen you must disable Listen SQ Your Listen LT 800 has been shipped to you with the SQ feature enabled You may need to disable the SQ function for one or more of the following reasons a You are using your new Listen LT 800 with older version Listen 12 receivers that do not have the SQ function You are using your new Listen LT 800 with equipment supplied by other manufacturers Listen is the only manufacturer using SQ Technology You expect that end users will bring and use their own receivers that don t have the SQ function NOTE See page 8 to enable or disable SQ Super Quiet Process Mode Process mode is used for Audio Gain Control AGC With the process mode enabled the LT 800 will automatically adjust for inconsistent signal input levels by raising or lowering the signal level accordingly to provide a consistent sound output level This feature should be used in applications where a consistent sound level is important and the input levels vary substantially Typically you would not want to engage the Process Mode when a speaker s emphasis is critical to the mess
19. er Make sure the LA 207 power supply is connected to a power source and is connected to the jack marked Power Input Make sure the POWER button is pressed in There is no audio or the audio level is too low Make sure that your audio source is properly connected to Input 1 and or Input 2 The Input or Input 2 switches must be in the correct position for the appropriate input level For example if you are using the output of a mixer on Input 2 the switch should be in the 10dBu position If it were to be in the 10dBu position the level would be too low Also check the Input knob to ensure it is properly adjusted You should be able to see the VU meter deflect on Input or Input 2 corresponding with the input level of the audio source You can listen to the audio source by connecting a headset to the front panel jack and adjusting the Monitor volume control If the level of audio into the transmitter is low and can t be corrected using the level input switches the audio processor can be turned on to boost the signal see page 8 to set page 12 for description of Process Mode The audio is distorted Check to make sure you have the input level select switches in the proper position You may be providing too much audio level for the input stage to handle Make sure the SQ mode is set correctly on both the LT 800 and the receivers you are using If your receivers do not have SQ make sure the SQ mode is turned off see page 8 There is hu
20. fer to page 12 Lock on Channel Once you determine your transmit channel you can lock the transmitter on that channel To lock a channel hold the Channel Select Up button for 3 seconds until the padlock icon appears on the display To unlock repeat this process and the padlock icon will disappear Va 2 za U E p Va D F D Been 0 Qa O Lock icon Test Tone if necessary To broadcast a test tone press the test tone button This helps to test receivers when no audio source is available E POWER TESTTON Press Test Tone button here 10 LT 800 Audio Control Adjust Audio Input Level Adjust the input knob counterclockwise to add gain to Input 1 This will decrease gain to Input 2 Adjust input knob clockwise to add gain to Input 2 This will decrease gain to Input 1 If you have two audio sources connected to both Input 1 and 2 adjust the level of one input using the VU meter then adjust the output level of the other audio source Adjust the input level until the left VU meter s occasionally illuminate the red LEDs Illumination of the red LEDs indicates the unit is in limiting Limiting is required so that the unit does not over modulate the transmitter If you don t want any audio limiting to occur make sure the red LEDs never illuminate If you want a highly limited signal turn the audio gain up so the red LEDs illuminate often TEST TONE Adjust Contour Ad
21. hoose a channel with the least amount of interference Unless you are interfacing with an existing narrowband transmission system always use a wide band channel If you are using multiple channels follow this process 1 Same Space f you are using multiple transmitters in the same space the highest number of channels that will work simultaneously is six at 72 MHz and three at 216 MHz With all of the transmitters off listen for interference on all the wide band channels with a Listen receiver Using the frequency compatibility tables on pages 15 17 eliminate any channels that have noticeable interference Now choose the channels with the widest channel spacing It Is recommended that adjacent channels be soaced at least 300k Hz apart If there is no interference the following channels are recommended For a 72 MHz system use channels A C E J and H For a 216 MHz system use channels ZA 2K and 2V 2 Distributed Spacing f you are using transmitters that are distributed over a large area you can achieve more simultaneous broadcast channels However it is critical that your receiver s be located as close to its transmitter as possible You can use adjacent channels see frequency compatibility tables on pages 15 17 in this case as long as the adjacent channel transmitter is at least 50 further away from the receiver than the original transmitter Example The transmitter for the receiver on channel E is 100 feet from the receiver
22. ine mic phantom power 12 VDC Rear panel Two 2 Phono connectors unbalanced 10 10 dBu nominal input level adjustable 30 dBu maximum impedance 100k Ohms Cuts and boosts frequencies above 5 kHz Combined Audio Opak Mis Input 1 and Input 2 Mixed Output Rear Panel Two 2 phono connectors unbalanced 10 dBu nominal output level 19 dBu maximum impedance 10 ohm Headphone Output Monitor Front panel One 1 3 5 mm stereo connector unbalanced adjustable output level 7 maximum impedance 10 Ohm Power Test Tone on off Channel UP DOWN Input levels Mix level Contour Monitor volume control r Input 1 Level line mic mic phantom power Input 2 Level 10 10 dBu RF Power low mid high Compression ratio for audio processor SQ on off Processing on off Channel lock Indicates Input 1 Input 2 and Mix audio levels 10 segment LED s 8 green 2 red Indicated by a green LED when on front panel Indicators Indicated on the LCD low mid high Channel designation lock status RF Power Level programming front panel Red LED illuminates when test tone enabled Power Supply Type In line power supply Listen part number LA 207 Line cord is determined by each country s AC power standards 1 75 x 8 50 x 9 13 in 4 5 x 21 5 x 23 cm AAA Physical Power Supply Shipping Weight 5 0 lbs 2 26 kg One 1 rack space height 1 2 rack space wide One 1 or two 2 transmitters can be mounted in one rack space
23. just the Contour knob counterclockwise if your audio source is mostly voice Adjust the knob clockwise if your audio source is mostly music The Contour knob adjusts the relative equalization of the unit This equalization boosts or cuts frequencies above 5 kHz O D 19 e 5 G Cc al Q gt G INPUT LEVELS ES Adjust Mix Level Adjust the mix level until the right VU meter occasionally illuminates the red LED This is the level adjustment for the combined output from Input I and Input 2 If you are using another manufacturers receivers with the LT 800 determine the frequency of their receivers then refer to Listen s Frequency Compatibility Tables pages 15 16 to find the LT 800 channel that corresponds with the receiver s frequency We recommend verifying corresponding channel designations on these tables to ensure compatibility and provide the best possible reception The LT 800 is Phonak compatible and can be set to display Phonak specific channels See page 8 to set Channel Mode and page 14 for specific channel designations 11 F O e 0 Va Listen SQ Super Quiet improving Your Listening Experience People are accustomed to listening to low noise high fidelity audio delivered via CD DVD etc FM radio systems such as those made by Listen have more inherent noise compared to most sound systems To minimize noise Listen uses a noise r
24. l client satistaction of working with Listen was rated 4 8 out of 5 Please continue with your excellent attitude toward customer satisfaction You guys are great ve never had such good service from any company Keep up the good work You stand behind your product wonderfully Assistive Listening e Language Interpretation e Soundfield e Tour Group Conferencing SJUBJUOD JO adp LT 800 Table of Contents Package Contents Specifications SJUSJUOD SBDADDA Architectural Specifications Specifications Block Diagram G Quick Reference 6 Setup Instructions 7 Operating Instructions 10 Audio Control 11 S Listen SQTM Super Quiet 12 z RF Reception Maximization Strategies 13 5 Coaxial Cable 13 Y Channel Selection Compatibility Charts 72 MHz Frequency Compatibility Chart 216 MHz Frequency Compatibility Chart 9 D sls iS D s Mm y 2 Le Lo Phonak Frequency Compatibility Chart 9 Supplementary Information 18 3 Troubleshooting 18 2 Compliance Notice 20 3 FCC Statement 20 i Warranty 2 Contacting Listen 21 d Optional Accessories 22 S supoyo Apiquodwod uoloajes jauuDYyD uoydesay 49 UOHDUIOJU LT 800 Package Contents LT 800 Contents LT 800 072 72 MHz or LT 800 216 216 MHz or 12 VDC Power Supply User Manual Listen Part Number LT 800 072 72 MHz LT 800 216 216 MHz Optional Accessories See page 22 as Q 0 A Q 0 0 LS
25. m in the audio Make sure you have properly grounded the audio source to the LT 800 Check the connections from the audio source to the LT 800 If you can try to use a balanced audio source this will reduce the chance of creating hum Connect a ground wire from the LT 800 to ground and or to the ground of the source audio There is a tone The Test Tone button has been pressed its LED light is on Push the Test Tone button to turn off the tone The Audio Input 1 sounds tinny If you are using an unbalanced audio source make sure Pin 3 on the XLR or the ring on the Ya plug is grounded see page 9 I cannot pick up the signal on the receiver Check to make sure the receiver and the transmitter are using the same frequency band i e 72 MHz or 216 MHz and that they are on the same channel Make sure the LT 800 has an antenna connected Ensure that the receiver has an antenna for portable products the headset is the receiving antenna I can pick up the signal on the receiver but it sounds like it s not tuned in Check to make sure the transmitter and receiver are on exactly the same channel It s a good idea to lock the channels once they have been set To lock the LT 800 press the UP button for 3 seconds see page 10 LT 800 Troubleshooting cont Troubleshooting I m using another brand of receiver how do I tell which channel to use Refer to Listen s Frequency Compatibility Tables pages 15 17 Adjust Listen s tran
26. ng and receiving antennas is critical to maximize broadcast range A Eliminate or minimize obstructions between the transmitting and receiving antenna ES Minimize the distance between the transmitting and receiving antennas EN Move transmitting and receiving antennas away from metal or conductive objects Ed Place the transmitting antenna as high as possible Hm Orient both transmitting and receiving antennas vertically Position the RF Power switch on the back of the LT 800 to full RF Power unless lower power is necessary see page 9 E Keep coaxial cable from transmitter to antenna as short as possible CAUTION When installing antennas ensure the antenna is clear of power lines Coaxial cable connectors and optional antenna mounting kits are available from Listen See page 22 23 visit www listentech com or ask your dealer for details Coaxial Cable The antenna for the LT 800 can be mounted directly on the unit if desired However you may find that the unit will provide better performance when the antenna is located elsewhere If you plan to mount the antenna in a different location other than the top of the unit you must use cable and connectors rated at 50 ohms Although cable used for cable TV installations looks similar to this cable it will not work with your Listen system If you need to run cable over a length greater than 50 feet for 216 MHz applications or greater than 100 feet for 72 MHz applications or to maximize b
27. ons Input offers a choice of INPUT1 9 D mmm Cc D S n p 0 a Q gt o Line LINE MIC MIC PH PWR Back of LT 800 with XLR connected to Input 1 balanced XLR or 1 4 phono connector II Plug your microphone into Input 1 and move Mic S the input select switch to Mic for dynamic 222 op ie I microphones or Mic PH Power for condenser AD EES microphones Mic with x Phantom Power MIC PH PW LINE MIC Plug your balanced or unbalanced audio source into Input 1 Use the following diagram XLR Wiring 1 4 Phone Wiring Ring Sleeve FN Input from Balanced Unbalanced Audio Audio Source Source RE ae Tip Ring Balanced Unbalanced Audio Source Source WA mput Plug your unbalanced audio source into Input 2 and select the audio level switch for 10dBu or 10dBu to match the audio level coming from your equipment LT 800 Operating Instructions Power Unit On Turn power on by pressing the power button ea Select a Channel Select the transmit channel by pressing the channel select UP and DOWN buttons See Channel Selection on page 14 for more information MONITOR CHANNEYSELECT Channel Select UP and DOWN buttons NOTE The LT 800 is shipped with only limited channels Basic Mode To select from all channels Expanded Mode refer to page 12 for a more detailed description of Basic and Expanded Mode re
28. ophones you must use a converter LA 280 to adapt the 3 5 mm connection to a 1 4 phono connection LA 113 RG 8 50 Ohm Low Loss Coaxial Cable per ft LA 390 RG 8 50 Ohm Preassembled Coaxial Cable per ft Microphone Accessories LA 262 LA 270 Over the Head Microphone LA 278 Behind the Head Microphone Noise Canceling Microphone LA 127 RG 58 BNC Connector LA 39 1 RG 58 50 Ohm Preassembled Coaxial Cable per ft LA 274 Hand Held Microphone 4 LA 279 Over the Ear Microphone Presentation Style 1 4 in to 3 5 mm Microphone Adapter for LT 800 LT 82 Notes Notes 25 Notes Notes 27 Listen www listentech com Listen Technologies Corporation 14912 Heritage Crest Way Bluffdale Utah 84065 4818 U S A 1 801 233 8992 1 800 330 089 North America 1 801 233 8995 fax www listentech com 2008 Listen Technologies Corporation All Rights Reserved 081308
29. roadcast range Listen recommends that you use RG 8 cable rather than RG 58 RG 8 is a lower loss cable meaning that more of your signal will reach the antenna Long cable runs can result in signal degradation due to the loss characteristics of the cable When using RG 58 with a 72 MHz transmitter there is an average loss of 4 dB per 100 feet of cable and at 216 MHz using RG 58 an average loss of 8 dB per 100 feet of cable A 3dB loss means half of your power has been lost However it is better to suffer coaxial power loss than to try to shoot your signal through obstacles Obstacles especially metal can create drop outs or reflections of your signal that will result in poor listening conditions wz RAU zo 0 D gt Q NOTE There are many varieties of 50 ohm RG 58 and RG 8 cables You may purchase a cable that is better or worse than this value Please check with the cable vendor or manufacturer for exact specifications Ss U v 0 G s D lt O 14 Channel Selection It is important to choose channels that are free from interference to achieve proper operation of your Listen equioment This process is trial and error Before turning on the transmitter listen to the wide band channels on the receivers lettered channels at 72 MHz and channels that start with a 2 for 216 MHz when using a Listen receiver Listen to the audio through the headphone or via the soeaker and c
30. smitter to the same frequency as the other major brand Since Listen products can access 57 channels they will most likely receive on the same fixed channel or channels of other major brands If you are using another brand of receiver make sure you have turned off the SQ feature on the Listen product s There is not sufficient range First make sure that the receivers you are using are operating properly then make sure that you have an antenna connected either to the top of the LT 800 transmitter or connected to the back of the unit but not both The antenna should be as high as possible and free of obstacles In addition make sure you are using the correct antenna type for your unit You might want to use a remote antenna provided by Listen that can be mounted on a mast or wall Try using different frequencies to find one with less interference There is interference in my transmission Ensure that the transmitter and receivers are on the same channel Verify that there are no other transmitters on the same channel or a close channel to the one exhibiting interference Try different channels until you find a clear channel If this does not work try a different frequency band i e if you are using 72 MHz try 216 MHz or vice versa Please contact Listen support for assistance and a return authorization RMA number to exchange product for alternate frequency equipment End users are adjusting the unit First lock the channel by pressing and
31. subject to the following two conditions 1 These devices may not cause harmful interference and 2 these devices must accept any interference received including interference that may cause undesirable operation Listen s LT 800 Transmitter 216 MHz only Listen s LT 800 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 Navy SPASUR installations You do not need an FCC license to operate these transmitters These transmitters may only be used to provide auditory assistance to persons with disabilities persons who require language translation or persons in educational settings health care services to the ill law enforcement tracking services under agreement with a law enforcement agency or automated maritime telecommunications system AMTS network control communications Two way voice communications and all other types of uses not mentioned above are expressly prohibited This device must be installed by a trained audio professional or certified dealer of Listen The user can t make any modifications to the unit without expressed written consent of Listen Technologies Corporation Any modifications made will void the FCC compliance Listen warranty and the users authority to operate Listen s equipment FCC Statement This equipment has been tested and found to comply with the limits for a class B digital device pursuant to par
32. t Plug Adjust audio input levels Input 2 _ Shows mixed modeisactive e is selected in a headset and audio level adjust volume of Input 1 and Input 2 here See page 11 for more information 0 19 E 0 he 0 De ul DE 2 gt O e Listen wr e wen www listentec h com D PROCESS SQ ae be CH Listen INPUT LEVEL MIX LEVEL CONTOUR AN a Q 6 9 0 00 O POWER TEST TONE CHANNEL SELECT Gr FM Transmitter Power e ON OFF Mix Level Adjust so e Test Tone Activates the Mix Level meter Channel Select Up Channel Select Down a tone to aid system occasionally lights Contour Equalization Press for 3 seconds Press for 8 seconds to setup the red LED adjustment Turn tolockon current enter program mode counter clockwise for channel See page 8 for more voice and clockwise for information music LT 800 Back Panel Connections amp Settings Input 1 Used for balanced l Input 2 Set switch to connection of a microphone Remote Antenna Connection Mix Output These connectors match the level of your or line level input This See page 22 or the Listen contain a mix of Input 1 and Input 2 audio source combination connector website for details on antennas Input 2 They are unbalanced not used to increase or accepts either XLR or 14 that can be attached here phono connectors and the decrease level by 10dBu phono plugs output level is 10dBu ANTENNA INPUT2 RF POWER
33. t 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This 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 However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception 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 Reorient or relocate the receiving antenna e 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 This equipment has been certified to comply with the limits for a class B computing device pursuant to FCC and IC Rules In order to maintain compliance with FCC and IC regulations shielded cables must be used with this equipment Operation with non approved equipment or unshielded cables is likely to result in interference to radio and TV reception The user is cautioned that changes and modifications made to the equipment without the approval of manufacturer could void the user s authority to operate this
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