Listen Technologies LP-3CV-072 User Manual

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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 +1.800.330.0891 North America +1.801.233.8995fax 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-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 your excellent attitude toward customer satisfaction. You guys are great!”

“I’ve never had such good service from any company. Keep up the good work!”

“You stand behind your product wonderfully.”

Assistive Listening • Language Interpretation • Soundfield • Tour Group • Conferencing

Value Package Table of Contents

Design Guide

 

 

FM Technology Overview

5

 

System Overview

6

 

Key Concepts in Value Package Setup

7

 

Alternative Options for Value Package Setup

11

 

Notes

13

 

LT-803-072Stationary FM Transmitter

 

 

Specifications

20

 

Block Diagram

21

 

Quick Reference

22

 

Setup Instructions

23

 

Operating Instructions

25

 

Accessories

29

 

Notes

30

 

 

 

 

LR-200-072FM Receiver

 

 

Specifications

36

 

Block Diagram

37

 

Quick Reference

38

 

Setup Instructions

39

 

Accessories

42

 

Notes

43

 

 

 

 

Supplementary Information

 

 

Battery Charging Information

50

 

Frequency Chart

51

 

Troubleshooting

52

 

Frequently Asked Questions

54

 

Compliance, Warranty and Contact Information

55

 

Notes

57

 

Guide Design

072-803-LT

072-200-LR

Supplementary

Value Package Design Guide Table of Contents

FM Technology Overview

5

System Overview

6

Key Concepts in Value Package Setup

7

Alternative Options for Value Package Setup

11

Notes

13

Value Package Contents

(1) LT-803-072Stationary3-ChannelFM Transmitter

(4) LR-200-072Standard3-ChannelFM Receiver

(1) LA-12390° Helical Antenna

• (4)

LA-161

Single Ear Bud

 

 

LA-161Single Ear Bud

• (1)

LA-304

Assistive Listening Notification Signage Kit

 

 

 

 

 

 

• (1) LA-207

12 VDC Power Supply

 

 

 

 

 

 

• (1)

Installation Guide

 

 

 

 

 

 

Guide Design

LT-803

LT-803-072Stationary3-ChannelFM Transmitter

12 VDC Power Supply

LA-12390° Helical Antenna

72

 

DARD

RECE

IVER

STAN

 

 

 

 

 

 

LR-200-072Standard3-ChannelFM Receiver

This facility is equipped with a hearing assistance system. Please ask for a receiver.

LA-304Assitive Listening

Notification Signage Kit

Installation Guide

3

Frequency Modulation (FM) Technology Overview

Frequency modulation or (FM) is a means of transmitting audio using electromagnetic waves. This same technology is used by local FM radio stations to broadcast music. FM signals can travel through most barriers

– walls, floors, and ceilings. The distance a signal travels has many different variables such as Radio Frequency (RF) output power, the type and placement of the antenna, and the broadcasted frequency. Unlike infrared, FM transmission are not secure. This enables a receiver to travel further distances from the source. This section of the manual will help you design a system that will get the best range and least amount of interference.

Guide Design

Audio Mixer

72

LT-803

FM Receiver

FM Transmitter

Audio Source

5

Design Guide

System Overview

There are four main components to the Value Package – the transmitter, antenna, receiver and input source.

Input Source

The input source can be audio from a sound board, microphone or a personal audio source like a CD player, MP3 player, computer, DVD, etc. Audio will be connected into the audio inputs of the Stationary Transmitter.

Transmitter

The LT-803-072transmitter modulates the audio on an FM carrier and transmits the signal via an antenna.

LT-803-072Stationary3-Channel

FM Transmitter (72 MHz)

LT-803

Antenna

The LP-3CV-072includes theLA-12390° Helical Antenna. This antenna has a BNC connector and should be mounted on the back of theLT-803-072.For further antenna options see page 11.

LA-12390° Helical Antenna

Receivers

The LR-200-072receiver captures the signal sent from the transmitter and outputs it into theLA-161Single ear bud. Listen offers a variety of receivers.

72

LR-200-072Standard3-Channel

 

FM Receiver (72 MHz)

RECE

IVER

STANDARD

6

Key Concepts in Value Package Setup

Input Selection

The LT-803-072has two audio input options: Input 1 and Input 2. Input 1 is a balanced connection using either an XLR or ¼ in. phono connector, and input 2 is two unbalanced phono connectors. Use Input 1 if you are using a microphone or if you have a balanced connection such as a professional audio mixer (you can also use Input 1 for unbalanced connections). Use Input 2 to connect to an unbalanced audio source.

Balanced XLR or

1/4 in. phono connector

Unbalanced right and left phono connectors

Input 1: Connecting the audio source

Input 1 offers a choice of balanced XLR or ¼ in. phono connector. Plug an audio source into Input 1: move the input select switch to the type of input source being used. Select “Line” for Line Inputs, “Mic” for dynamic microphones or “Mic + PH Power” for condenser microphones. A balanced feed from a soundboard can also be used with Input 1.

Input 2: Connect the audio source

Plug your unbalanced audio source into Input 2 and select the audio level switch for -10dBu or +10 dBu to match the audio level coming from your equipment.

Guide Design

7

Design Guide

Key Concepts in Value Package Setup

Using Multiple inputs

The LT-803-072can accommodate multiple inputs simultaneously with the use of the input level potentiometer. When multiple inputs are present, both input level lights will be activated.

LT-803

Input Level Knob

Mix Level

The mix level acts as the “master transmit” control. It will increase the transmit gain on the “mix” of the two levels (if two levels are in use).

LT-803

Mix Level Adjustment

8

Key Concepts in Value Package Setup

Selecting Transmitting Frequencies

Use this section of the guide to choose the channel settings for the transmitter and receivers.

Find transmission channel(s)

The goal is to find a transmission channel(s) that is free from interference. Interference comes from transmitters and other outside FM signals.

Listen’s LT-803-072offers 3 different channels to choose from

With 3 different channels to choose from, the chance of finding an interference free channel is increased. The best way to check for interference is to turn the LR-200-072on and listen to each channel. Transmit on the channel that has the least amount of noise.

Testing System

Monitor Jack

The headphone jack is used to monitor the mix of input 1 & 2. You can adjust the monitor level with the volume knob. The headphone jack is a standard 3.5 mm jack.

Guide Design

 

3

803

LT-

 

3

Headphone

Monitoring Jack

Test Tone

Use the test tone to transmit a 400 Hz tone. This tone will allow the end user to know if the system is transmitting properly. All receivers should be able to hear this tone if tuned to the proper channel.

LT-803

Test Tone Button

9

Design Guide

Key Concepts in Value Package Setup

Antenna placement (rear)

Rear mounted antenna

Rear mounting the LA-12390° Helical Antenna (72 MHz) will allow the transmitter to be moved if necessary.

Maximizing Transmission Range

For proper and dependable operation, Listen receivers need to receive a strong and consistent signal from the originating transmitter. The following strategies should be used to maximize this signal:

Transmitting antenna

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. Minimize the distance and remove any obstructions

between the transmitting and receiving antennas. Keep transmitting and receiving antennas (receiver earphone cord) away from metal or conductive objects.

RF Power switch

Position the RF Power switch on the back of the LT-803-072to full RF Power, unless lower power is necessary.

Low, med or high RF power

10

Alternative Options for Value Package Setup

Remote antenna

The LA-122Universal Antenna Kit (72 and 216 MHz) and theLA-116Coaxial Dipole Remote Antenna (72 MHz) connect to theLT-803-072and can be placed away from the transmitter for better range. They also allow the unit to be rack mounted with the antenna remotely using theLA-326Universal Rack Mounting Kit. Both theLA-122andLA-116come with 25’ of black coaxial cable(RG-58).

ATTENTION: Long cable runs can result in signal degradation due to the “loss” characteristics of the cable. Minimize cable runs as much as possible or use “low loss” RG-8cable.

LA-122Universal Antenna Kit (72 and 216 MHz)

LA-116Coaxial Dipole

Remote Antenna (72 MHz)

Guide Design

Receiver Options

Listen offers a variety of portable and stationary receivers. Each receiver offers different features to help further customize your FM system.

ATTENTION: The SQ “Super Quiet” function must be turned OFF for better audio quality when using the LT-803-072contained in this Value Package.

LR-300-072

LR-400-072

LR-500-072

Portable Programmable Display FM Receiver

Portable Digital FM Receiver

Portable Display FM Receiver

(72 MHz)

(72 MHz)

(72 MHz)

 

LR-100

 

Mute Squelch

Up

RF Power

Channel

Speaker

Output Level

 

Power

 

 

 

 

 

 

 

Seek

 

 

 

 

 

 

 

Headphone

 

 

 

Down

 

 

 

 

 

 

 

 

 

 

 

 

LR-100-072

Stationary FM Receiver/ Power Amplifier

(72 MHz) LR-600-072

Wireless FM Receiver/Speaker

(72 MHz)

11

Design Guide

Key Concepts in Value Package Setup

Rack Mounting the Transmitter

The LT-803-072can be rack mounted if necessary. With the use of the ListenLA-326Universal Rack Mount Kit, you can mount one or two transmitters to the standard 19” rack. The rack mounted unit will take 1 ru of space.

LT-803FM Transmitter

LT-803FM Transmitter

Rack Mount with dual units installed.

LT-803FM Transmitter

Rack Mount with single unit installed.

The antenna can also be in the front of the rack with the use of the LA-125Antenna Kit for Rack Mount (72 MHz) and theLA-326Universal Rack Mounting Kit.

LT-803FM Transmitter

Rack Mount with single unit and external antenna installed.

NOTE: The antenna may need to be remote mounted using the LA-122Remote Antenna Kit if the transmitter(s) is rack mounted. If a rack is metal, it is not recommended to have the antenna inside. Also, the depth of the rack and equipment inside could prevent an antenna from being placed inside.

12

Notes

Guide Design

13

Notes

Design Guide

14