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,

efcient 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
+1.801.233.8995

North America

fax

[e-mail]
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!

• Overall client satisfaction of working with Listen was rated 4.8 out of 5.

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• “You stand behind your product wonderfully.”

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

Table of Contents

Package 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

Information

1

LT-800 Package Contents

Package Contents

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

3

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)

RF

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

4

In-Line

(provided)

Top Mounted

BNC

HEADPHONE

12 VDC 1.3A

On

PROCESS

Functions controlled by the CPU

Volume

Up

Down

Remote

On

O

Compression Ratio

Red
LED

Green

Green

MIX LEVEL

On

O

Low

High

Mid

Female XLR-1/4"

Combo Connector

2/Tip

3/Ring

Line

1/Sleeve

Mic

12VDC

Mic
Phantom Pwr

+10dBu

Phono

Phono

OFF

ON

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

Package Contents

Specications

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

SQ

Companding

SQ

-10dBu

VU Meter

CONTOUR

LED

(internal adjustment)

ProcessingPre-emphasis

INPUT

400Hz

1

INPUT 2

MIX OUTPUT

TEST TONE

5

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

Quick Reference

Quick Reference

Package Contents

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.

SQ

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.

6