Listen Technologies LS-71-216, LS-70-216, LS-57-216, LS-56-216, LS-55-216 Users Manual

...

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

satised. 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,

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Here’s how to reach us:

+1.801.233.8992 +1.800.330.0891 +1.801.233.8995

North America

fax

support@listentech.com www.listentech.com

Thank you and enjoy your listening experience!

Best regards,

Russell Gentner and the Listen Team

• 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!

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Assistive Listening • Language Interpretation • Soundeld • Tour Group • Conferencing

LT-800 Table of Contents

Package Contents 3

Specications 4 Architectural Specications 4 Specications 4 Block Diagram 5

Quick Reference 6 Setup Instructions 7 Operating Instructions 10 Audio Control 11 Listen SQ™ (Super Quiet) 12 RF Reception Maximization Strategies 13 Coaxial Cable 13

Channel Selection 14 Compatibility Charts 15 72 MHz Frequency Compatibility Chart 15 216 MHz Frequency Compatibility Chart 16 Phonak Frequency Compatibility Chart 17

Supplementary Information 18 Troubleshooting 18 Compliance Notice 20 FCC Statement 20 Warranty 21 Contacting Listen 21 Optional Accessories 22

Table of Contents

Package Contents

Table of Contents

Specications Quick Reference Setup Instructions Operating Instructions Listen SQ™ RF Reception

Specications

Quick Reference

Setup Instructions Operating Instructions

Listen SQ™

RF Reception

Channel Selection Compatibility Charts

Channel Selection

Compatibility Charts

Information

LT-800 Package Contents

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

Specications

LT-800 Specications

Architectural Specications

The stationary FM transmitter shall be capable of broadcasting on 57 channels. The transmitter shall have a SNR of 80dB 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.

Speciﬁcation

Specications LT-800-072 LT-800-216

RF Frequency Range 72.025 - 75.950 MHz 216.025 - 216.9875 MHz Number of Channels 17 wide band, 40 narrow band 19 wide band, 38 narrow band Frequency Accuracy +/-.005% stability 32˚ to 122˚F (0˚- 50˚C)

Audio

Transmitter Stability 50 PPM Output Power 80,000uV at 3 m 100mW (max allowed by FCC) Antenna Various Antennas available Antenna Connector BNC Compliance FCC Part 15, Industry Canada FCC Part 90, Industry Canada

System Frequency Response 50 Hz - 15 kHz (±3 dB) 50 Hz - 10 kHz (±3 dB) System Signal to Noise Ratio

(A-Weighted) System Distortion <2% total harmonic distortion (THD) at 80% deviation

Audio Input 1

Audio Input 2

Audio Processing (Process) Compression can be turned on/off. Slope internally adjustable from 1:1 to 4:1. Default 2:1 Contour Cuts and boosts frequencies above 5 kHz

Combined Audio Output (Mix)

Headphone Output (Monitor) Front panel. One (1) 3.5 mm stereo connector, unbalanced, adjustable output level, +7 maximum, impedance 10 Ohm.

80 dB SQ enabled; 60 dB SQ disabled 80 dB SQ enabled; 50 dB SQ disabled

Rear panel. (1) Female-XLR and ¼ in. combo connector, balanced, 0/-55 dBu (line/mic) nominal input level adjustable,

-30/+21 dBu (line/mic) maximum input level, impedance 20k/1k Ohms (line/mic), phantom power +12 VDC.

Input 1 and Input 2 Mixed Output (Rear Panel). Two (2) phono connectors, unbalanced, -10 dBu nominal output level,

** All system specications are wireless end-to-end

Rear panel. Two (2) Phono connectors, unbalanced, -10/+10 dBu nominal input level

adjustable, +30 dBu maximum, impedance 100k Ohms.

+19 dBu maximum, impedance 10 ohm.

Front Panel Power, Test Tone on/off, Channel UP/DOWN, Input levels, Mix level, Contour, Monitor volume control.

Controls

Indicators

Power

Physical

Environmental

Rear Panel Input 1 Level (line, mic, mic-phantom power), Input 2 Level (-10/+10 dBu), RF Power (low, mid, high) Internal Adjustments Compression ratio for audio processor Programming SQ on/off, Processing on/off. Channel lock

Input 1 and Input 2, Mix VU Indicates Input 1, Input 2 and Mix audio levels. 10 segment LED’s (8 green, 2 red) SQ and Processing Indicated by a green LED when on (front panel) RF Power Indicated on the LCD (low, mid, high) LCD Display Channel designation, lock status, RF Power Level, programming (front panel) Test Tone 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). Power Supply Input Input: 100-240 VAC, 50-60 Hz, 0.4 A Power Supply Output Output: 12 VDC, 1.3 A, 15.6 W Power Supply Connector Output Connector: .02 in. (5.0 mm) OD, .01 in. (2.5 mm) ID, barrel type Power Supply Compliance UL, CE, GS, TUV

Dimensions (H x W x D) 1.75 x 8.50 x 9.13 in. (4.5 x 21.5 x 23 cm) Color Dark Grey with white silk screening Unit Weight 2.6 lbs. (5.7 kg) Unit Weight with LA-201 4.4 lbs. (2.0 kg) Power Supply Shipping Weight 5.0 lbs. (2.26 kg)

Rack Mounting

Temperature - Operation -10˚C (14˚F) to +40˚C (104˚F) Temperature - Storage -20˚C (-4˚F) to +50˚C (122˚F) Humidity 0 to 95% Relative Humidity, non condensing

One (1) rack space height, 1/2 rack space wide. One (1) or two (2) transmitters can be mounted in one rack space.

Optional rack mount (LA-326)

Specications are subject to change without notication

In-Line

(provided)

Top Mounted

BNC

HEADPHONE

12 VDC 1.3A

PROCESS

Functions controlled by the CPU

Volume

Down

Remote

O

Compression Ratio

Red LED

Green

MIX LEVEL

O

Low

High

Mid

Female XLR-1/4"

Combo Connector

2/Tip

3/Ring

Line

1/Sleeve

Mic

12VDC

Mic Phantom Pwr

+10dBu

Phono

OFF

Red LED

Test Tone Button Front Panel

Input 1 VU

MIX Level

LT-800 Block Diagram

POWER

100-240 VAC

50-60 Hz

0.4 A

Power Supply

LA-207

O

Power Supply

CPU Module

CHANNEL SELECT

Listen LCD Display

Backlighted

3.5MM Stereo

Package Contents

Specications

Antenna

Connection

ANTENNA

Module

Antenna Stud

Meter

Transmitter RF Board

RF POWER

Input Level

Front Panel

Input 1 Level Select

Mic-Phantom Pwr, Mic, Line

Input 2 Level Select

+10dBu/-10dBu

Input 2 VU

Meter

LED

Companding

-10dBu

VU Meter

CONTOUR

LED

(internal adjustment)

ProcessingPre-emphasis

INPUT

400Hz

INPUT 2

MIX OUTPUT

TEST TONE

LT-800 Quick Reference

Adjust audio input levels of Input 1 and Input 2 here. See page 11 for more information.

Specications

Quick Reference

Package Contents

Power ON / OFF

LT-800 Front Panel: Controls & Displays

Indicates Process Mode is active.

Shows mixed audio level.

Contour: Equalization adjustment. Turn counter-clockwise for voice and clockwise for music.

Test Tone: Activates a tone to aid system setup.

Indicates audio input level of Input 1 and Input 2.

Mix Level: Adjust so the Mix Level meter occasionally lights the red LED.

Indicates Super Quiet mode is active.

Top mount antenna connection: Remove rubber plug and screw antenna in place.

LCD: Shows which channel is selected.

Channel Select Up: Press for 3 seconds to lock on current channel.

Channel Select Down: Press for 8 seconds to enter program mode. See page 8 for more information.

Monitor Port: Plug in a headset and adjust volume.

LT-800 Back Panel: Connections & Settings

Remote Antenna Connection: See page 22 or the Listen website for details on antennas that can be attached here.

Set RF Power level here (¼, ½, and Full). See page 9 for guidelines on setting power levels.

Mix Output: These connectors contain a mix of Input 1 and Input 2. They are unbalanced phono connectors; and the output level is -10dBu.

The Listen LA-201 power supply connects here.

Input 2: Connect unbalanced audio to these phono connectors, input level -10dBu or +10dBu.

Input 2: Set switch to match the level of your Input 2 audio source, not used to increase or decrease level by +10dBu.

Input 1: Used for balanced connection of a microphone or line level input. This combination connector accepts either XLR or ¼” phono plugs.

Select Line, Mic or Mic+Phantom Power. Line is balanced 0 dBu input level, Mic is -55dBu, +12VDC supplied in PH Power position. 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.

Rack Mount with dual unit installed

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 connector. See page 22 for antenna options, or refer to the Listen website for remote antenna options, www.listentech.com.

Coax antenna connection. Rear of LT-800 shown.

LA-122 Remote Antenna See RF Reception Maximization Strategies and Coaxial Cable on page 13.

Rack Mount with single unit installed Shown with LT-800

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)

rubber plug

Package Contents

Setup Instructions

Quick Reference

Specications

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 unit).

12 VDC 1.3 A

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)

Specications

Quick Reference

Setup Instructions

Package Contents

LT-800 Setup Instructions (cont.)

To Select Phonak Mode:

Press and hold down the channel select “up” button while powering on the unit. The LCD 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.

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.

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,

Program icon

the SQ and Process featurs can be turned on and 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 disabled the features as desired, let the transmitter exit the program mode by waiting 5 seconds.

LED lit when

SQ is enabled

LT-800 Setup Instructions (cont.)

Set RF Power

Set the RF POWER 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 will need depends on your application. If you

12 VDC 1.3 A

are operating multiple transmitters in the same environment, it is best to set the transmitters

Back of LT-800 unit

output power to its lowest level to reduce the possibility of interference.

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 1 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 connections. Input 1 offers a choice of

balanced XLR or 1/4” phono connector.

Line

Full

power

1/2

power

1/4

power

Back of LT-800 with XLR connected to Input 1

Package Contents

Setup Instructions

Quick Reference

Specications

Plug your microphone into Input 1 and move the input select switch to Mic (for dynamic microphones) or Mic + PH Power (for condenser microphones).

Plug your balanced or unbalanced audio source into Input 1. Use the following diagram.

XLR Wiring

- +

1/4” Phone Wiring

Mic

Mic with

Phantom

Power

12 VDC 1.3 A

Input 2

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.

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.

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 refer to page 12)

Specications

Quick Reference

Setup Instructions

Package Contents

Operating Instructions

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.

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.

Press Test Tone button here

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.

Adjust Contour

Adjust 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.

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 1 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.

Operating InstructionsSetup Instructions

Operating Instructions

Package Contents

Quick Reference

Specications

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 reduction 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:

You are using your new Listen LT-800 with older version Listen

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).

SQ Summary

• SQ is NOT squelch

• SQ improves noise performance by at least 20dB

• SQ is NOT compatible with older version Listen products

• SQ is NOT compatible with other manufacturers’ products

• 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

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

Listen SQ™

Specications

Quick Reference

Setup Instructions

Package Contents

levels vary substantially. Typically you would not want to engage the

Process Mode when a speaker’s emphasis is critical to the message

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.

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:

When designing and installing your system, keep in mind that the location of both the

transmitting and receiving antennas is critical to maximize broadcast range.

Eliminate or minimize obstructions between the transmitting and receiving antenna.

Minimize the distance between the transmitting and receiving antennas.

Move transmitting and receiving antennas away from metal or conductive objects.

Place the transmitting antenna as high as possible.

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).

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 broadcast 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.

*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.

Package Contents

Setup Instructions

Quick Reference

Specications

RF Reception

Channel Selection

It is important to choose channels that are free from interference to achieve proper operation of your Listen equipment. 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 speaker and choose 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 If 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 spaced 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, I, J

and H. For a 216 MHz system, use channels 2A, 2K and 2V.

2. Distributed Spacing If 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. The adjacent channel transmitter on channel D should be at least 150 feet away.

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 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 narrow band channels.

• “2” as left digit= Wide Band Channel

(Example: 2C)

• “1” and “3” as left digits= Narrow Band Channels (Examples: 1A; 3R)

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

Specications

Quick Reference

Setup Instructions

Channel Selection

Package Contents

Channel Selection

2. 216 MHz is a primary frequency band and no other types of

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.

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.

72 MHz Compatibility Chart

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).

*Parenthesis indicate T35 and T20 narrowband.

Compatibility Charts

Package Contents

Setup Instructions

Quick Reference

Specications

216MHz Compatibility Chart

upd 03.16.04

Light

Speed

1 1 C01 N01

1E 9 9 C09 N09

3F 12 12 C12 N12

3H 16 16 C18 N18

24 64 C24 N64

3R 32 72 C32 N72

1U 37 77 C37 N77

216.937

3U 38 88

216 MHz Compatibility Chart

Frequency

MHz Listen

216.012

216.025

216.037

216.062

216.075

216.087

216.112

216.125

216.137

216.162

216.175

216.187

216.212

216.225

216.237

216.262

216.275

216.287

216.312

216.325

216.337

216.362

216.375

216.387

216.412

216.425

216.437

216.512

216.525

216.537

216.562

216.575

216.587

216.612

216.625

216.637

216.662

216.675

216.687

216.712

216.725

216.737

216.762

216.775

216.787

216.812

216.825

216.837

216.862

216.875

216.887

216.912

216.925

1 2 3 1B 3 21 2B 42 42 42 2 10 3B 4 4 1C 5 5 C05 2C 43 43 43 A 3 6 3C 6 22 1D 7 23 2D 44 44 44 B 4 14 3D 8 8

2E 45 45 45 C 5 2 3E 10 24 1F 11 25 2F 46 46 46 D 6 11

1G 13 13 2G 47 47 47 E 7 7 3G 14 26 1H 15 27 2H 48 48 48 F 8 15

1J 17 17 C21 2J 49 49 49 G 9 18

3J 18 18 1 2 3

1M 25 65 C25 2M 53 53 53 J 12 8 3M 26 81

1N 27 82 2N 54 54 54 K 13 16 3N 28 68 1P 29 69 C29 2P 55 55 55 L 14 19 3P 30 83 1R 31 84 2R 56 56 56 15 4

1S 33 73 C33

2S 57 57 57 13

3S 34 76

2U 59 59 59 17

Phonic

Ear Comtek Phonak Williams Gentner CSI AVR

41 41 41 1 1

21 61

51 51 29 H 10 3

22 62 23 28

52 52 52 I 11 12

35 85

58 58 58 9

36 86

Specications

Quick Reference

Setup Instructions

Package Contents

Compatibility Charts

Phonak Frequency Chart

Frequency (MHz) Listen Phonak

216.012 1A 1

216.025 2A 41

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 1F 25

216.275 2F 46

216.287 3F 12

216.312 1G 13

216.325 2G 47

216.338 3G 26

216.363 1H 27

216.375 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 1L 28

216.575 2L 52

216.588 3L 64

216.613 1M 65

216.625 2M 53

216.637 3M 81

216.662 1N 82

216.675 2N 54

216.688 3N 68

216.713 1P 69

216.725 2P 55

216.738 3P 83

216.762 1R 84

216.775 2R 56

216.787 3R 72

216.812 1S 73

216.825 2S 57

216.838 3S 76

216.863 1T 85

216.875 2T 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

Compatibility Charts

Package Contents

Setup Instructions

Quick Reference

Specications

LT-800 Troubleshooting

Troubleshooting

The LT-800 has no power

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 1

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 1 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 hum 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

¼” 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).

Information

Specications

Information

Quick Reference

Setup Instructions

Package Contents

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 transmitter 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 holding the channel select UP button for 3 seconds.

Consider removing the Input, 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.

I am 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 I 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.

Package Contents

Setup Instructions

Quick Reference

Specications

Information

Compliance Notice & FCC Statement

Compliance Notice

This device complies with part 15 of the FCC Rules. Operation is 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 part 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. Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver is

connected.

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 equipment.

Information

Specications

Information

Quick Reference

Setup Instructions

Package Contents

Warranty & Contacting Listen

Warranty

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 transferred. 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 modied by anyone other than a factory authorized

service technician. Warranty does not cover normal wear and tear on the product or any other physical damage unless the damage was the result of a manufacturing defect. 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 specically disclaims and negates any warranty of merchantability or tness 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 rst ninety days after purchase, any defective 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 at fee. Contact Listen for details.

This limited warranty, prices and the specications 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 headquarters are located in Bluffdale, Utah U.S.A. and are open Monday through Friday, 8am to

5pm Mountain Time.

14912 Heritagecrest Way

Bluffdale, Utah 84065-4818

+1.801.233.8992 +1.800.330.0891 +1.801.233.8995

North America fax

support@listentech.com www.listentech.com

Listen Technologies GmbH Jasminstr.16, 90522 Oberasbach, Germany +49 911 955 159 0 +49 911 955 159 40

Europe

Fax

support@listentech.de www.listentech.de

Package Contents

Setup Instructions

Quick Reference

Specications

Information

Optional Accessories

LA-101

Helical Top Mounted Antenna

(72 MHz)

LA-107

Ground Plane Remote Antenna

(216 MHz)

Antenna Accessories

LA-102

Telescoping Top Mounted

Antenna (216 MHz)

LA-122

Universal Antenna Kit

The single solution for all of your indoor remote antenna needs. Includes: 72 and 216 MHz components; flexible and rigid dipoles and monopole radials; hardware for multiple mounting configurations; and 25 feet (7.6m) of RG-58 coax cable.

LA-106

Telescoping Top Mounted

Antenna (72 MHz)

LA-123

90˚ Helical Antenna

(72 MHz)

LA-124

90˚ Helical Antenna

(216 MHz)

Information

Specications

Information

Quick Reference

Setup Instructions

Package Contents

LT-800 Rack Mount Accessories

LA-125 (72 MHz) and LA-126 (216 MHz)

Antenna Kit for Rack Mount

LA-326

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.)

LA-112

RG-58 50 Ohm

Coaxial Cable (per ft.)

LA-128

RG-8 BNC Connector

Cable & Connectors Accessories

LA-113 RG-8 50 Ohm Low-Loss Coaxial Cable (per ft.)

LA-390

RG-8 50 Ohm Preassembled

Coaxial Cable (per ft.)

LA-127

RG-58 BNC Connector

LA-391

RG-58 50 Ohm Preassembled

Coaxial Cable (per ft.)

Microphone Accessories

LA-261

Lavalier Microphone

LA-276

Collar

Microphone

NOTE: To use Listen microphones you must use a converter (LA-280) to adapt the 3.5 mm connection to a 1/4” phono connection.

LA-277

Conferencing

Microphone

LA-262

Over-the-Head

Microphone

LA-278

Behind-the-Head

Microphone

LA-270

Noise Canceling

Microphone

LA-279

Over-the-Ear Microphone

Presentation Style

LA-274

Hand-Held

Microphone

LA-280

¼ in. to 3.5 mm

Microphone

Adapter for

LT-800/LT-82

Package Contents

Setup Instructions

Quick Reference

Specications

Information

Notes

Listen Technologies Corporation 14912 Heritagecrest Way

Bluffdale, Utah 84065-4818, U.S.A.

+1.801.233.8992 +1.800.330.0891 +1.801.233.8995

North America

fax

www.listentech.com

Listen Technologies LS-71-216, LS-70-216, LS-57-216, LS-56-216, LS-55-216 Users Manual

Specifications and Main Features

Frequently Asked Questions

User Manual