Listen Technologies LT-700-150 User's Manual
Contents
1. Li ten User s Manual www listentech com LT 700 150 Portable Display FM Transmitter niss a single sound DearValued 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 pnde in their outstanding performance because we care that you are completely Satisfied That s why we independently certify them to the highest quality standardsand 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 expenence 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 0891 north America 1 801 233 8995 fax support listentech com www listentech com Thank you and enjoy your listening experience Best regards Russell Gentnerand the Listen Team e In the few instances where repairs were needed 99 of all clients indicated that they were happy with repairtum around timesand 85 of the time clients were without their product for less than 10 days Overall client satisfaction of working with Listen was rated 4 8 out of 5 Please continue with yourexce2. Channel lock LED Red illuminated when unit ison Flashes when batteries are low orto indicate charging Flashes when muted Display Channel Designation lock status signal strength indication battery life RF Power Battery Type Two 2 AA batteries alkaline or NIMH Battery Life Listen batteries 15 hours alkaline LA 361 8 hours NiMH rechargeable LA 362 Battery Charging NIMH only Fully automatic 13 hours Power Power Supply I P 120VAC O P 7 5VDC 250 mA Drop in contact points for use with charging cases Power supply not included LA 208 Power Supply Connector 2 3mm OD by 0 7mm ID barel type connector 7 5 VDC center positive lt 250 mA Drop in contact points for use with Listen charging cases Power Supply Compliance ROHS WEEE UL PSE CE CUL TUV CB compliant Dimensions H x W xD 3 00 x 1 00 x 5 00 in 7 6 x 2 5 x 13 0 cm Dark Grey with white silk screening Unit Weight 3 9 oz 111g Physic al Unit Weight with battenes 5 8 oz 164g Shipping Weight 1 0 Ibs 0 45kg Manually Lockable on sides Up down and power buttons through door Specifications are subject to change without notific ation LF700 Quick Reference LT 700 Front MUTE TALK switch more information on page 9 3 5 mm Input Jack A Listen microphone or line level cable connects here ae ES en Look amp Listen Display The display shows level channel battery status PROGRAM mode whether a channel is locked and whet
3. Le PM diagram below for connection information You can use the LO O Loon microphone and the line input at the same time Please note Mic MUTE m thatthe MUTE switch mutes only the microphone the line gt source will continue transmitting when the switch is in the MUTE position If you preferto make your own cable for connection of mic and line inputs connection shown in the following diagram Microphone Gm Ground Tip Ring gn Line Input Mono White Video Yellow LI 700 Operating Instructions Make sure the unitis on When you press the power button the LED on top of the unit will be illuminated and the LCD display will be visible a Select the channel for tra nsmitting Please referto Channel Selection on page 13 for guidelines on choosing an interference free channel To selecta channel press either the channel UP or DOWN button until the display reads the channel you want To lock your selection pressand hold the UP or DOWN button for 5 seconds When locked the small padlock icon will be visible on the display Pressand hold either button again to unlock 150 MHz Units The LT 700 150 operates on 6 wide band channelsand 26 narow band channels Close the Access Door Lock it if desired by tuming the locks on the side of the unit to the vertical position See diagram on page 7 Using the red MUTE TALK switch on top of the unit The red mute talk switch on top of the unit isa handy way to tum off the audio from
4. 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 orequipment not manufactured by Listen you should disable Listen SQ Your Listen equipment has been shipped to you with the SQ feature enabled You may need to disable the SQ function forone or more of the following reasons 1 You are using your new Listen system with older version Listen equipment that doesnot have the SQ function 2 You are using your new Listen system with equip ment supplied by other manufacturers 3 You expect that end users ma y bring and use theirown receivers that donit have the SQ function Listen SQ Improving your Listening Experience e SQ is NOT squelch e 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 To work properly SQ must be enabled for both the transmitter and receivers e SQ can be disabled to permit operation with older Listen products or other manufacturers products RF Reception Maximization Strategies Forproperand dependable operation Listen receivers should receive a strong and consistent signal from the onginating transmitter The following strategies should be used maximize this signal a When using your system keep in mind that the location of both the transmitter and receiver is cri
5. receiver that does not have the SQ feature see page 14 for more information MUTE TALK switch this mutes the mic only and not the line input when in the mute position LED indicators Steady Red Normal operation Slow Flashing Battery is low Slow Flashing while charging Unit is charging Fast Flashing Mute A Note on Charging NiMH Batteries If you are using NiMH batteries in any Listen product you should allow adequate time for the charger charging case or LA 208 to complete a full charge cycle on the batteries This takes about 13 hours LT 700 Setup Instructions Remove the product Remove outer packaging and plastic cover Inspect for physical damage If damage isapparent please contact Listen Technologies Corporation technical support for assistance See page 19 for contact information PWRICHG Open the front access door If locked use a pocketknife or small screwdnver to unlock the door locks on both sides of the unit To unlock the door rotate the lock 1 4 tum ay counterclockwise Grip the two tabs with your thumb and index fingerand pull the door downward Do NOT place battenes in the unit yet j Select Battery Type See diagram below You have two choices NiMH and Alkaline The unit is shipped with the switch in the Alkaline position Use a pen or small screwdnver to select the batter
6. the microphone Slide the switch to the mute position and the microphone audio is muted When the microphone audio Is muted the LED on top of the unit flashes rapidly Slide the switch back to the talk position and the micro phone audio will retum to the transmission If you are using line level audio it will not be effected by the mute talk switch LT 700 Shown in the TALK position 10 LF700 Programming Instuctions The LT 700 can be programmed to transmit on a limited number of channels For applications where users are required to select a channel such as classooms or language interpretation and you don t want them to have to scroll through all of the available channels this feature isideal You can set up the LT 700 so that only the channels they need to use are available for selection with the UP and DOWN buttons Enter PROGRAM Mode Press and hold the UP and DOWN keys simultaneously until the PGM symbol is displayed see the Look amp Listen Quick Reference on page 5 Scroll Though Channels to Lock or Unloc k Use the UP and DOWN channel select keysto sc roll through all available channels If the YO symbol appears with a particular channel s indicator this means that particular channel will not be available for selection by the user To toggle a channel between locked out and available press the POWER button To exit PROGRAM mode Allow the unit to sit idle don t press any buttons f
7. Hentagecrest Wa y Bluffd ale Utah 84065 4818 U S A 1 801 233 8992 1 800 330 0891 North America 1 801 233 8995 fax www listtentech com Printed in China O 2009 Listen Technologies Corporation All Rights Reserved 09162009
8. an achieve more simultaneous broadcast channels However it is critical that your receivers be located as close to its transmitter as possible You can use adjacent channels see frequency chart on page 16 in thiscase aslong asthe adjacent channel transmitter is at least 50 further away from the receiver as its transmitter It ishighly recommended that after channel selection hasbeen achieved you lock the channel so that it cannot be changed by the user To accomplish LOCK on the LT 700 press both the UP or DOWN buttons simultaneously for 5 seconds Repeat the processto unlock 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 150MHz The LT 800 at 72MHz operates on 6 wide band channels and 27 narrow band channels e Numbers 0 6 Wide Band Channels Example 4 e Numbers 7 32 Narrow Band Channels Example 32 13 14 People are accustomed to listening to low noise high fidelity audio delivered via CD DVD etc FM radio systems such asthose made by Listen have more inherent noise compared to most sound systems To minimize noise Listen uses a noise reduction technology called ListenSQ Both the transmitter and receiver must have the SQ feature enabled to achieve the desired results SQ is availa ble on new
9. clear channel I cannot pick up the signal on the receiver Make sure the transmitter and the receiver are on the same frequency band and channel 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 number letter If using another brand of receiver refer to Listen s Frequency Chart on page 16 LT 700 Troubleshooting cont Troubleshooting There is not sufficient range The LT 700 isa portable transmitter that uses the microphone cable asan antenna and the range will vary depending on the location of the receivers compared to the transmitter You can only expect about 100 feet of average effective working range It s confusing for users to have 32 channels when switching between channels Use the PROGRAM function to lock out unwanted channels This way users will only need to scroll among a few channels I cannot change the channel It is probably locked check forthe padlock icon To unlock press and hold the UP or DOWN button for 5 seconds My battenes are not charging Make sure you are using NiMH battenes and that the BATTERY SELECT switch inside the battery Compartment is set to the NiMH position Make sure the battenes are installed correctly Make sure you are using the right kind of wall transformer Listen part number LA 208 or charging case Make sure the charging case isconnected to power and the unit is secur
10. ely pushed into its slot in the case NOTE Listen uses 2300 mAh mill Amp hour constant current NiMH Nickel Metal Hydnde battenes These may be purchased from your Listen dealer ask for part number LA 362 18 SSS ess ae Warranty amp Contacting Listen Warranty Listen Technologies Corporation Listen wa mants its transmitters and receivers LT 82 LT 700 LT 800 LR 42 LR 44 LR 400 LR 500 to be free from defects in workmanship and material under nomal 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 nomal 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 matenal under normal use and conditions forone year from date of purchase Listen wa mants its Charging Canying 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 materal under nomal use and conditions for one year from date of purchase All other products and accessones are waranted for 90 days from date of purchase This warranty is only available to the original end purchaserof the product and cannot be transfered Wa manty is only valid if warranty card hasbeen retumed within 90 days of purchase This warranty is void i
11. f SQ in the LT 700 There is hum in the audio The microphone may be too close to a transformer Try moving around and see if the hum goes away The microphone level is low The microphone must be in close proximity to the person who is speaking If this does not work try using a head wom microphone The mic sensitivity switch may be on the wrong setting see page 7 Try a different setting the switch is located inside the battery compartment Some microphones have directional pickups ensure that the microphone in use isonented and positioned properly pointing at the soeakers mouth The audio doesn t have much fidelity If your receivers all have SQ capability activate SQ in all units by moving their switches to the ON position In the LT 700 and all SQ equipped receivers the SQ switch is located inside the battery compartment See page 14 for more information There is too much noise This is most likely because the microphone is not close enough to the speakers mouth and it is picking up background noise Try positioning the microphone closer or try using a microphone that is direc tional such asa head wom mic If you are using a namow band channel try switching to a wide band channel Try another setting on the mic sensitivity switch located inside the battery compartment Ensure the microphone is not brushing up against anything See page 7 for more information There is interference Try different frequencies until you find a
12. f damage occurred because of misuse or if the product has been repaired or modified by anyone otherthan a factory authorized service technician Warranty does not cover nomal wearand tearon the product orany other physical damage unlessthe damage wasthe result of a manufacturing defect Listen is not lia ble for consequential damages due to any failure of equipment to perform asintended 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 wananty of merchantability or fitness of use of such equipment including without limitation any waranty that the use of such equipment for any purpose will comply with applicable lawsand regulations The terms of the wananty are govemed by the laws of the state of Utah In the first ninety days after purchase any defective product will be replaced with a new unit After 90 days Listen will at its own discretion either repairorreplace transmitters and receivers with a new unit ora unit of similartype and condition Product that isnot covered under wananty shall be repaired orreplaced with a unit of similartype and condition based on a flat fee Contact Listen for details This limited warranty pricesand the specifications of products are subject to change without notice Contacting Listen If technical service isneeded please contact Listen Pre authonzation is required before retuming Listen products If pr
13. he setting is too low LA 274 Handheld Microphone HI for the microphone the audio LA 276 CollarMicrophone HI will be faint If the setting is too LA 277 Conference Microphone MED ls LA 278 Behind the Head Microphone MED ASS LA 279 Over The Ear Microphone Presentation Lo Style LT 700 Setup Instructions cont Place Batteries in Unit Place two 2 AA battenes in the compartment making note of the battery polanty shown in the battery compartment and again venfying that the BATTERY SELECT switch is in the correct position for the battenes you are using ALK should be selected forall battery types other than NiMH NOTE Listen uses 2300mAh mill Amp houn constant current NiMH Nickel Metal Hydnde battenes These may be purchased from your Listen dealer ask for part number LA 362 Connect the Microphone The microphone jack islocated on top of the unit The LI 700 uses the microphone cable asan antenna for transmitting Optional Connect the Line Input Cable Female 3 5 mm This cable allows you to connect a TV CD player or other Line Input Cable Microphone equipment to the LT 700 To do this you must orderthe LA 263 Ne Male Phono Listen LA 263 Line Input Cable it is not included with your gt IV CD Player unit This cable allows you to connect both a microphone u and line input to the jack on top of the LT 700 See the
14. her a channel is locked out from selection PROGRAM mode See close up below com select a channel Press and hold either button for 5 seconds to lock Use UP and DOWN buttons to CS Y rm Power Switch the channel Press and hold either p PWR switch button again to unlock ee li ten roy on nn o turn unit off When in Press A hold a e PROGRAM mode this switch seconds to enter PROGRAM mode is used to toggle the lock out The PGM icon will appear in the L O mode for a channel display To exit PROGRAM let unit sit idle for 5 seconds LT 700 Look amp When dots are illuminated the Indicates the Listen Display microphone is active If this currently tuned display does not appear the channel microphone is muted Battery level indicator The indicator flashes along with the red LED on top of the unit to alert you when the battery is low and needs to be charged or changed see information below Indicates the unit is in PROGRAM mode To enter PROGRAM mode press and hold the UP and DOWN keys until the PGM icon appears in the display To exit PROGRAM If the padlock icon is When in the PROGRAM mode let the unit sit idle for 5 visible the channel is mode L O indicates seconds locked Press and hold whether a particular either the UP and DOWN channel is locked out button for 5 seconds to lock or unlock LT 700 Battery Indicator One
15. l be able to enable companding The unit shall operate off of two 2 AA battenes alkaline or NIMH The portable transmitter shall incorporate automatic battery charging circuitry for recharging of NIMH battenes with the ability to charge via a wall transformer or drop in charging case The Listen LT 700 150 is specified Spec if ations RF Frequency Range 150 8000 MHz 152 3500 MHz Number of Channels 6 wideband 26 narrowband Number of Simultaneous Six 6 Tra nsmitte rs Frequency Accuracy 005 sta bility 32 to 122 0 to 50 C Transmitter Sta bility 50 PPM Transmission Range up to 45 72 m 150 ft Output Power 10 mW maximum Antenna Uses microphone cable 3 5mm connector C Tick Antenna Connector Compliance System Frequency 50 Hz 15 kHz 23d B Response System Signal to Noise Ratio SQ enabled 80 dB SQ disabled 60 dB System Distortion lt 2 total harmonic distortion THD at 80 deviation Microphone Input Unbalanced tip of 3 5mm connector 20 dbu nominal 30 dbu maximum impedance 21 ohms Microphone Sensitivity Three position switch high middle and low 6 db increments Line Input Unbalanced ring of 3 5mm connector 10 dbu nominal input level 3 dbu maximum impedance 10K ohms Microphone Power 3 VDC Bias User Controls Power mute channel UP DOWN Set up Controls battery Mic sensitivity NIMH alkaline battery SQ enable disable compartment Controls amp p Indicators Programming Channel lock out
16. llent attitude toward customer satisfaction You guys are great Pve never had such good service from any company Keep up the good work You stand behind your product wonderfully Assistive Listening Language Interpretation Soundfield TourGroup Conferencing LF 700 Table of Contents Package Contents 150 MHz Specifications Quick Reference Setup Instructions Operating Instructions Programming Instructions Charging Battenes 11 Wall Transformer Operation 12 Channel Selection 13 Listen SQ 14 RF Reception Maximization Strategies 15 150 MHz Frequency Chart 16 Troubleshooting Warranty Contact Information Optional Accessones LT 700 Package Contents LT 700 150 Contents e LT 700 150 150 MHz Listen Part Number LT 700 150 150 MHz Optional Accessones See page 20 LI 700 Spec rfic ations Architectural Specific ations The portable FM transmitter shall be capable of broadcasting on 32 channels The unit shall incorporate a microphone sensitivity switch The device shall broadcast on both wide and narow band channels with a SNR of 80 dB or greater The device shall have an audio frequency response of 50 Hz to 15 KHz 33 dB The device will incorporate a mute switch The battery door shall be capable of being mechanically locked The device shall incorporate an LCD display that indicates channel battery level low battery battery charging and RF signal strength The device shal
17. not need to have battenes installed in the LT 700 to operate it with a wall transformer NOTE If battenes are in the unit ensure that the battery selection switch is set propery as shown on page 7 Please review the information on page 11 for important information regarding battery type and Charging PORTABLE TRANSMITTER Channel Selection It is important to choose channelsthat are free from interference to achieve proper operation of your Listen equipment This process is tral and error Before tuming on the transmitter listen to the wide band channels Listen to the audio through the headphone oron a Listen receiver or recelver speaker Choose a channel with the least amount of interface Unless you are interfa c ing with an existing narrowband transmission system always use a wide band channel If you are using multiple channels follow this process a Same Space If you are using multiple transmitters in the same space the maximum number of channels that will work simultaneously is six at 150 MHz With all of the transmitters off listen for interference on all the wide band channels via the headphone jack on a Listen receiver Using the frequency chart on page 16 eliminate any channels that have noticeable interference Now choose the channels with the widest channel spacing It isrecommended that adjacent channels be spaced at least 300 kHz b Distibuted spacing if you are using transmitters that are spread out overspace you c
18. oducts were damaged in shipment please contact the camer then contact Listen forreplacement or repair requirements payable by the camer Listen s corporate headquartersare located in Bluffdale Utah U S A and are open Monday through Frida y 8am to 50m Mountain Time 14912 Hentagecrest Way Bluffdale Utah 84065 4818 1 801 233 8992 1 800 330 0891 North Amenca 1 801 233 8995 fax support listentech com www listentech com 19 20 Optional Accessones Microphone Accessones LA 261 LA 262 LA 270 LA 272 Lavalier Microphone Overthe Head Noise Canceling Overthe Head Mic LA 274 Hand Held Microphone Microphone w Earphone Microphone CS LA 276 LA 277 LA 278 LA 279 LA 263 Collar Conferencing Behind the Head Over the Ear Microphone Line Mic Y Input Microphone Microphone Microphone Presentation Style Cable for LT 700 Accessones LA 361 High Capacity AA Alkaline Battenes 2 16 Unit Portable Charging Canying Case 16 Unit Portable Canying Case 4 Unit Portable Charging Canying Case 4 Unit Portable Carying Case Configurable Carrying Case 8 Unit Portable Charging Canying Case 8 Unit Portable Canying Case 4 Unit Portable Charging Canying Case w Removable Lid LA 362 8 Unit Portable Charging Canying Case w Removable Lid Rechargeable AA NiMH 16 Unit Portable Charging Canying Case w Removable Lid Battenes 2 Notes 21 Listen www listentech com Listen TechnologiesCorporation 14912
19. or 5 seconds The LI 700 will exit the PROGRAM mode and the PGM icon will disappear LF700 Charging Battenes The LT 700 and all Listen receivers are unique because they have SmartCharge chargers built in When any of these units are connected to an LA 208 wall transformer or dropped into a Listen charging case NiMH battenes will be charged To charge the batteries using the LA 208 wall transformer plug the m ie plug transformer into the jack marked PWR CHG on the side of the unit The unit can be operated while the battenesare charging To charge the battenes using a drop in charger simply place the unit into a slot in the chargerand connect the chargerto power Make sure the unit is fully seated in its slot There are several charging casesavailable from Listen Check the Listen p PWRICHG website for more details SmartCharge usesa pulse charging which greatly extends the life of Nickel Metal Hydnde NiMH battenes The entire charging process takes about 13 hours Listen recommends that you allow the chargerto complete its full cycle every time for maximum battery life jG IMPORTANT DO NOT ATTEMPT TO CHARGE ANY TYPE OF BATTERY OTHER THAN NiMH NICKEL METAL HYDRIDE with your Listen equipment Alkaline batteries may explode when connected to a charger Other risks of charging non NiMH batteries include destruction of property or fire IMPORTANT In o
20. rder to charge NiMH batteries the BATTERY SELECT switch in your Listen product must be set to the NiMH setting Use a pen or small screwdriver to move the switch located in the battery compartment to the proper position Dunng the charge cycle the red LED on top of the Listen product will flash slowly When charging is completed the LED will tum off It isnot necessary to unplug the charger however if you unplug the unit from the charger and then plug it back in it will begin the 13 hour charge cycle over again When not using the LT 700 it isrecommended to leave the unit on the charger The charger providesa maintenance charge that keeps the battery at 100 If the unit is not on the charger the battery will lose up to 20 of its charge per month NOTE Listen uses 2300mAh milli Amp hour constant current NIMH Nickel Metal Hydnde battenes These may be purchased from your Listen dealer ask for part number LA 362 One of several charging cases available from Listen See www ListenTech com for more options LA 311 16 unit Drop In Charging Case shown 11 12 LT 700 Wall Transformer Operation The LT 700 will operate normally when connected to a wall transformer Use Listen part number LA 208 available from any Listen dealer Connect the wall transformer to the jack on the side of the LT 700 marked PWR CHG and plug the wall transformer into a grounded AC outlet You do
21. segment showing Aliens Tvosssmentexkonind Your batteries less than 25 capacity g g J When this segment begins flashing i showing The batteries The batteries are at m are at 50 or greater m 25 49 capacity along with the LED on top of the unit W capacity y you should immediately change your batteries or recharge them if using NiMH batteries a LT 700 Quick Reference LT 700 Inside Access Door Battery Select Switch eee cameitivs f fe z Sam Mic Sensitivity Z Switch Eo SENSITIVITY E I IL mr Se ae O e re E WA p r Lo WARNING WAY B l I o a k CT 77 gt NL Am Sf A u 1 N L IE E A NS I I LA A A N Zn O QU Y a I e A Y Mi m 3 5mm Input Jack A microphone or line level cable connects here SQ Switch Mic Sensitivity Switch it arrives set at MED which will work for most microphones If your mic level is too low change the switch to HI if the level is too high switch to LO see page 7 for more information Battery Select Switch place in NiMH position ONLY if you are using Nickel Metal Hydride batteries otherwise leave it in the Alkaline position SQ Switch shipped in the ON position use a screwdriver or pen to slide to the OFF position if needed You should turn SQ off if you are using any non Listen receiver or older Listen
22. tical to maximizing signal strength b Eliminate or minimize obstructions between the transmitter and the receivers c Minimize the distance between the transmitterand the receivers d Stay clearof metal objects e Keep the microphone and headphone cables fully extended Do not shorten or coil microphone and headphone cables These cablesare the antennas for you portable products 15 16 150 MHz Compatibility Chart 06 15si800 0 o8 1so9s0 o9 151000 LF700 Troubleshooting Troubleshooting The LF700 has no power Make sure the unit has fully charged battenes orhasa Listen LA 208 wall transformer connected to it Press the ON button If this does not work try a different set of battenes Make sure the battenes are installed correctly There is no audio Make sure the MUTE TA LK switch is in the TALK position Make sure you have the microphone plugged all the way in to the input jack Make sure you are using a Listen approved microphone see list on page 7 If you are using the line input make sure you have connected a line level unbalanced input atthe ring of the connector The audio is distorted Make sure you are using an approved Listen microphone Try using a different mic sensitivity switch setting the switch is located inside the battery compartment of the unit If you are using a line level input try tuming down the level of the input If you are using any equipment that doesnot have SQ capability tum of
23. y type CAUTION If you are using any battery type other than rechargeable Nickel Metal Hydnde NiMH battenes make sure the BATTERY selection switch is in the alkaline position Unlocked Locked WARNING Do not place the BATTERY switch in the NiMH position if you are not using Nickel Metal Hydride Batteries The NiMH position will attempt to charge any batteries in the unit even if they are not the proper type Charging non Nickel Metal Hydride NiMH batteries will result in physical harm destruction of property and or fire Set SQ swrtc h The SQ switch is inside the battery compartment next to the Battery Select switch The unit is shipped with SQ in the ON position To tum it a off use a small screwdriver or pen to slide the switch to the OFF position to the nght See page 14 for more information on SQ SQ Switch Mic Sensitivity e Switch Set Mic Sensitivity Switch The microphone sensitivity switch is located inside the battery compartment to the left of the BATTERY selection switch The LT 700 is shipped with this switch in the center MED position Listen recommends the following settings for our microphones If you are using a microphone from another vendor you may need to expenment with different settings Part Descnption Setting LA 261 Lavalier Microphone MED a a LA 262 Over the Head Microphone MED I LA 270 Noise Canceling Microphone MED LA 272 Over the Head Microphone w Earphone MED NOTE If t
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