Listen Technologies LR-100 User Manual

User’s Manual

LR-100 Stationary Receiver / Power Amplifier

Listen Technologies Corporation
8535 South 700 West, Suite A
Sandy, Utah 84070-2515 USA
Telephone: [phone]
Toll Free (North America): 1.800.330.0891
Fax: [phone]
E-mail: [e-mail]

Don’t miss a single sound. Listen.

Welcome to Listen!

Dear Valued Customer,

Thank you for choosing Listen! All of us at Listen are dedicated to providing you
the hightest quality products and prompt, efficient customer care. Our products are
manufactured in an ISO-9000 factory that has been independently certified to the
highest quality standards. We stand ready to answer any questions you might have
during installation or in the operation of our products. Should there be any prob­lems with your Listen products, we are ready to help you in any way we can.
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:

Telephone: [phone]
Fax: [phone]
Toll Free (North America): 1.800.330.0891
E-Mail: [e-mail]
Web: www.ListenTech.com

Thank you... and enjoy your listening experience!

Best regards,

The Listen Team

i

Listen™ and the Listen Logo are registered trademarks of Listen Technologies Corporation.

LR-100_2004_08_03 © 2003 Listen Technologies Corporation. All Rights Reserved.

· LR-100-072 (72MHz) or

· LR-100-216 (216MHz) or

· 120 VAC Power Supply

· LA-123 90 Degree Helical Antenna (72MHz) or

· LA-124 90 Degree Helical Antenna (216MHz)

· Allan Wrench

· Warranty Card

· User Manual

LR-100 Package Contents

LR-100-072 for 72 MHz
LR-100-216 for 216 MHz

Listen Part Number

See page 20

Optional Accessories

Table of Contents

Architectural Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Quick Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Speaker Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Antenna Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Squelch Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Listen SQ™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Channel Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

RF Reception Maximization Strategies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Resetting After an Overload Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Coaxial Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

72 MHz Frequency Compatibility Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

216 MHz Frequency Compatibility Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Compliance Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

FCC Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Table of Contents

Specifications

2

Architectural Specifications

The FM stationary receiver - power amplifier (receiver) shall be capable of receiving on 57 wide and narrow
band channels in the frequency ranges of either 72MHz or 216MHz. The receiver shall be programmable to
electronically lock out unneeded channels. The device shall have an adjustable squelch with an LED indica­tion. The frequency response of the device shall be within 3dB from 63Hz to 15KHz at 72MHz, or within 3dB
from 63Hz to 10kHz at 216MHz. The signal to noise ratio shall be 80dB or greater. The device will have an
integrated power amplifier capable of driving an 8 Ohm speaker. The device shall be rack mountable and shall
have the capability of a remote antenna. The device shall incorporate an LCD display that indicates channel
and RF signal strength. The Listen LR-100 is specified.

Specifications

Specifications

Specification LR-100-072 LR-100-216

RF Frequency Range 72.025 - 75.975 MHz 216.025 - 216.987 MHz

Number of Channels 57 (17 wide, 40 narrow) 57 (19 wide, 38 narrow)

Sens itivity

Frequency Accuracy

Antenna

Flex ible helical,

9.0 in (23 cm) included

Flex ible helical,

5.5 in (14 cm) included

Optional Antennas

Antenna Conne ctor

Squelch

Compliance

System Frequency Response 63Hz - 15kHz (±3dB) 63Hz - 10kHz (±3dB)

System Signal-to-Noise Ratio
(A-weight ed)

SQ enabled: 80dB; SQ disabled 60dB

SQ enabled: 80dB; SQ disabled

50dB

System Distortion

Auxiliary I nput to Output

Balanc ed A uxiliar y Input

Unbalanced Auxiliary Input

Balanced Output

Unbalanced Output

Headphone Output

Speaker Output

Set-up Controls,
Fro nt Panel behind Security Cov er

Set-up Controls , Back Panel
User Controls

Remote Controls

Programming
VU Me ter

Power

LCD Display

Squelch

Mute

Power Supply Type

Power Supply Input

Power Supply Output

Power Supply Connecto r

Compliance

Optional Battery

Optional Battery Charging

Dimens ions

Unit W eight

Unit Weight w/LA-201 Power Supply

Shipping W eight

Rack Mo unting
Temperature - Operation

Temperature - Storage

Humidity

Trickle charge of optional 12VDC battery through terminal block

.6uV typical, 1 uV maximum for 12dB SINAD

Several available. See www.ListenTech.com for details

-10° to +40°C (14° to 104° F)

BNC

Rear panel. Two Phono connectors, unbalanced, -10 dBu nominal o utput

level, +2dBu maximum, impedance 2k Ohms

Front panel. One 3.5mm stereo connector, unbalanced, adjustable output

level, +16dBu maximum, impedance 32 Ohms, 120mW.

15VAC, 1A

.02 in OD x .01 in ID (5.0mm x 2.5mm) ID, barrel type

** All s ystem specifications are wir eless end-to-e nd

Green LED illuminates when the unit is squelched

12VDC, connected via terminal block

UL Listed

In-line power supply, Listen part number LA-2 01

120VAC, 60 Hz, 19 watts (maximum continuous)

Unit can be pr ogrammed so that only desire d channels ar e displayed to
the us er, chaannel s electio n can be loc ked by holding the SEEK button 5

seconds.

Four LED (three green, one red)

Green LED illuminates when the unit is power ed up

Channel, RF signal s tre ngth, lock status, pr ogramming

0-9 5% r elativ e humidity, non-condensing

2.8 lbs (1.3kg)

5.6 lbs (2.5kg)

1/2 rack unit (RU), optional rack mount not include,

order Listen part number LA-326

-20° to +50° (-4° to 122° F)

± .005% stability 0° to 5 0° C (3 2° to 122° F)

Rear panel, One detachable ter minal block, bridged, adjustable output

level, 15/10 watts (peak/RMS) continuous power with 4 Ohm load

Rear panel. Two Phono connectors, unbalanced, -10 dBu nominal input

level adjus table, +7dBu max imum, impe dance 10k Ohms

Rear panel. One Male XL R, balanc ed, 0 dBu nominal output le ve l, +16 dBu

maximum, impedance 2k/1 0 Ohms (line/mic)

Continuous ly adjustable via f ro nt pane l trim pot

Fre quenc y Respo nse: 25Hz to 2 0kHz (±3dB), SNR: >80 dB, Distor tion: <0.2%

Rear panel. One F emale XL R-1/4 in co mbo connec tor , balanced, 0dBu
nominal input level adjustable, +13dBu maximum, impedance 600 Ohms

FCC Part 15, Industry Canada

<2% total harmonic distortion (THD) at 80% deviation

Environmental

RF

Audio

Indicator s

Receive lev el, auxiliary input level, SQ on/o ff , sque lch

Audio output se lect (RX Only, RX + AUX, RX or AUX),

Speaker (Output, Aux), swit chable balanc ed output level

Controls

4.2 lbs (1.9kg)

Power

Physical

Green LED illuminates when the output audio is muted

Eight position detachable terminal block, channel up, channel down, mute

Volume, channe l UP/DOWN , SEEK (all cont rols exce pt volume are lockable )

8.0 in x 8.0 in x 1.75 in WxDxH (20.3cm x 20.3cm x 4.45cm)

Quick Refernce

3

Quick Reference

LR-100 Front Panel

VU METER: Set Receive and
Auxiliary levels so that the
red LED (at right) does not
illuminate

MUTE: when lit, the OUTPUT
audio is muted. MUTE is
activated and deactivated by
a momentary closure to
ground on the rear detach­able terminal block (see next
page).

SEEK: press to find the next
strong signal. Also used to
lock and unlock channel selec­tion; press and hold for 5 sec­onds. A padlock will appear
on the display when locked.
Press and hold again to
unlock.

HEADPHONE:

Connect a mono or
stereo headphone
here - 3.5 mm plug
(mini).

Look & Listen™

Display - see details
below

ACCESS PANEL
Remove to make set-up
adjustments

POWER switch: if
operated on battery,
switch is inoperative

SQUELCH: when
adjusted properly, this
LED is lit when the
transmit audio is not
being received.

UP and DOWN
channel tuning
buttons

SPEAKER control:
adjusts the volume of
your loudspeaker con­nected to the LR-100,
and/or the headphone.

LR-100 Behind Front Access Panel

SQUELCH adjustment: adjust so that
when your transmit audio is off, the
Squelch LED is illuminated. When
squelched, audio is muted (this
keeps you from hearing hiss in your
speakers)

RECEIVE audio level
adjustment

SQ: to activate, move
switch to ON position. This
switch should be turned
OFF if any of your equip­ment does not have SQ
capability.
See “Listen SQ” on Page
14 for more information.

AUXILIARY audio
level adjustment

RF Signal Strength

Indicates the currently
tuned channel

I/O: while in Program
mode, this symbol indi­cates that a channel is
locked out and will not be
available to the user. Press
SEEK to toggle channels
between Locked Out and
non-Locked Out modes.

PGM: when show­ing, the unit is in
Program mode to
lock out unwanted
channels from user
access.

When the padlock is visi­ble, the channel is locked.
Press and hold SEEK for
5 seconds to unlock or
lock.

LR-100 LCD Panel Details

Quick Reference

4

SPEAKER selection switch: this
selects the audio being routed
to the speaker amplifier to either
the OUTPUT or AUXILIARY audio.

Connect provided
power supply
here.

Optional 12V power: connect
optional battery or +12VDC
source here. The battery can
be recharged; see page 5.

CONTROL: remote
control of UP, DOWN
and MUTE functions.
All functions are
momentary closures to
common.

Unbalanced output:

phono, -10dBu nominal

AUDIO OUTPUT selection:

For RECEIVE audio only, select RX ONLY;
For RECEIVE audio mixed with AUXILIARY

audio, select RX + AUX;
For RECEIVE audio when not squelched

and AUXILIARY audio when squelched,
select RX or AUX

SPEAKER connection:
connect a 4 Ohm (or
greater) loudspeaker
here.

ANTENNA connection:
attach supplied 90 degree
helical antenna or optional
remote antenna here. Uses
standard 50 Ohm BNC
connector.

Balanced OUTPUT:

Male XLR, 0 or

-40dBu nominal

Unbalanced AUXILIARY
input: phono, -10dBu

nominal

Quick Reference

LR-100 Rear Panel

Balanced AUXILIARY input:

Combination Female XLR - ¼ in
connector; 0dBu nominal

MIC/LINE level switch:

reduces the balanced
OUTPUT audio gain by
40dB in Mic mode

Two internal
2 amp, fast
blow fuses

Block Diagram

5

LR-100 Block Diagram

115VAC

External Power

Supply
LA-201

Remote

Antenna

(Flexible helixal

antenna provided)

BNC

Power
On/Off

RF Receiver

Board

Sensitivity

Squelch

Squelch

+12 VDC

External Battery

Ground

Power Supply

CPU Module

Audio Processing

Module

Remote Control

5 6 7 8 3 4 1 2

Receive Level

Auxiliary

Level

Common

Listen LCD Display

SQ

On/Off

(internal)

Electronic

Switch

Up

Down

Seek

RX + Aux

RX

RX or Aux

Output
Select

Electronic

Switch

Mute

Aux

Output

Mic

Speaker

Line

Speaker

Male XLR

3.5MM
Stereo

Phono

XLR-1/4"
Combo

Detachable

Terminal

Block

Headphone

Output

Balanced

0 dBu

Output

Unbalanced

-10 dBu

VU

Meter

Auxiliary Input

Balanced

0 dBu

Phono

Auxiliary Input

Unbalanced

-10 dBu

Setup

6

LR-100 Setup Instructions

LR-100 Setup Instructions

· If you are using the LR-100’s power amplifier, make
sure the unit is given sufficient room around the
ventilation holes.

· If you are rack mounting the LR-100, use the
optional LA-326 rack mounting kit. This kit allows
for single and dual rack mounting, and comes with
a security cover.

· For mounting on vertical or horizontal surfaces, use
the optional L bracket mounting kit, part number
LA-327.

Powering the Unit

Please note: if the unit will not power up, see
Resetting After an Overload Condition, page 14.

AC Power Operation

The unit comes with a UL listed inline power supply
designed for 115VAC, 60Hz operation. Do not use
any other AC power supply. Use of any non-Listen
supplied power supply will void the warranty. (Battery
use is permitted; see below.) Plug the power supply
into the back of the unit at the connector labeled
POWER. Now connect the power supply to power.

Battery Operation

To operate the unit on a battery or +12VDC power
supply, connect to the rear detachable terminal block
as follows:

i. Pin 3: +12VDC
ii. Pin 4: Ground

Please note that when operating on the +12VDC bat­tery supply, the POWER switch is bypassed and the
unit is always on.

You can optionally charge batteries by also supplying
power to unit with the batteries connected. In this
case, the batteries are trickle charged at a rate of 18 ­36 mA. You should only use rechargeable type batter­ies.

CAUTION: Attempting to charge non-rechargeable
batteries may result in explosion and/or fire.

Detachable Terminal Block Wiring:

Pin 1: Speaker +
Pin 2: Speaker –
Pin 3: Ground for Battery or Power Source

connection
Pin 4: +12VDC Battery or Power Source
Pin 5: UP remote control function
Pin 6: DOWN remote control function
Pin 7: MUTE remote control function
Pin 8: Common for remote control function