Nady Systems ALD-800 User manual

ALD-800

OWNER’S MANUAL

Multi-Channel RF Wireless

Assistive Listening System

Contents

Introduction ............................................................................................................................. 2

ALD-800 Transmitter ............................................................................................................... 3

Conﬁrming Correct Installation................................................................................................ 4

ALD-800 Receiver Operating Instructions............................................................................... 5

Architects and Engineering Speciﬁcations .............................................................................. 7

Speciﬁcations .......................................................................................................................... 8

Service Information ................................................................................................................. 9

Warranty.................................................................................................................................10

Introduction

Thank you for choosing the Nady ALD-800 wireless RF personal listening assistance system,

we know you will be very pleased with its performance and features.

The Nady ALD-800

is the most cost-effective way to provide high quality listening assistance in compliance

with the Americans with Disabilities Act (ADA), which requires public facilities such as

movie theatres, etc. to make listening assistance systems available to their audiences.

The system is designed to be very easy to use and requires no installation.

The ALD-800 is speciﬁcally designed to be installed quickly and easily by virtually anyone.

In addition to its ease of use, the ALD-800 provides outstanding sound quality. The system

consists of one wireless transmitter and one or more pre-tuned portable wireless receivers.

The transmitter features eight factory switchable channels; the receivers are single channel

units that operate on one of eight channels in the 72-76 MHz band, with wide band

modulation for quality audio.

Unlike infrared listening systems, the ALD-800 can be used outdoors and indoors in bright

light without affecting performance.

The ALD-800 is perfect for virtually any application, from a small meeting room, or a

mid-sized house of worship, to a large cinema. The ALD-800 provides high quality hearing

assistance to any number of audience members, without seating restrictions.

The ALD-800 system has a wireless operating range of 300 feet. The transmitter connects

to the line out or tape out from a venue’s existing sound system, and broadcasts the audio

as an FM radio signal. The transmitter can also be used with an optional microphone.

Audience members who desire listening assistance use a pocket size Nady ALD-800

receiver with adjustable volume control and ergonomic, high performance earphones.

The ALD-800 system is expandable—one transmitter will provide audio to a limitless

number of receivers.

ALD-800 Transmitter

Compact RF transmitter operating within

the 72-76 MHz band designated for auditory

assistance frequencies by the FCC.

Eight factory switchable channels•

Input for line level audio•

Input for microphone•

Audio input gain control•

Automatic level control•

Extendible antenna•

AC-ALD800 9VDC regulated power•

supply adapter supplied

LED power on and audio•

modulation indicators

Setting Up the Transmitter

Your Nady ALD-800 requires minimum

installation. Simply place the transmitter

on any ﬂat surface, connect your mixing

board to the transmitter’s back panel input

(See Connecting Audio Input below),

connect the included power supply

(as explained below), and the transmitter

is ready to broadcast to any number

of ALD-800 receivers operating on the

same channel.

Powering the Transmitter

Connect the AC adapter provided into

the 9V DC jack (1) on the back panel of the

transmitter. Plug the other end into an

AC wall socket. Press Power switch (2).

The Power On LED (3) will light.

Antenna

Extend Antenna (4) fully and position

90 degrees from top of the transmitter.

Connecting Audio Input

The Line In jack (5) on the rear panel lets

you connect the ALD-800 to your mixing

console. This 1/4” mono phone jack accepts

an unbalanced line level audio source at

zero dBm nominal signal level. If your

mixer has XLR outputs only, you will need

an XLR-to-phone plug adapter, available

from most electronics stores and music

equipment stores.

Using a Microphone

The Mic jack (7) on the front panel allows

wireless cueing of on stage performers.

IMPORTANT: This 1/4” mono phone jack is designed

for an electret condenser microphone, and 9V

DC power is present at the input jack. If you wish

to use a conventional dynamic microphone, at

least 20 dB more gain is required, and a preamp

should be used. If a preamp is used, be sure to

have a blocking capacitor (1 mfd) between the

preamp output and the E03 mic input. If a dynamic

mic is plugged into the mic input by mistake,

there should be no damage because the current

is limited to 1.0 mA. If you have any questions,

contact Nady Customer Service (510.652.2411)

or your Nady dealer.

Audio Input Gain Adjustment

You can quickly adjust the transmitter to

obtain optimum performance with the

Input Gain control (8). The audio modulation

indicator LED, marked TX (6) will increase

in brightness as the control is turned

clockwise, and decrease in brightness

as the control is turned counterclock-

wise. When the “TX” LED is ﬂashing

during transmission, the transmitter is

broadcasting properly. (If the LED stays off

continuously or barely ﬂashes at all, the

input gain needs to be increased. If the LED

stays on continuously and does not ﬂash

during modulation, the input is overloading

and needs to be decreased.) You will also

need to test the transmitter in use with

an ALD-800 receiver. This procedure is

easy to do, and is explained in the receiver

instructions, which follow.

Conﬁrming Correct Installation

The transmitter’s TX LED (6) will ﬂash

when a microphone or line level signal is

broadcast by the transmitter. If “TX” does

not ﬂash, turn the audio input gain control

clockwise. This will increase audio level

and cause “TX” to ﬂash along with the

program source. When “TX” is ﬂashing,

the transmitter is broadcasting properly.

Test the transmitter with an ALD-800

receiver. This procedure is explained in

the receiver instructions.

Note: For the best performance, and to minimize

the possibility of interference from another source,

we suggest you experiment to ﬁnd the minimal

height the antenna must be extended in order to

perform well in your particular environment.

Channel Selection

Channel selection is controlled by

DIP-switches inside the transmitter.

The system is preset at the factory.

Changing the channel can be done

quickly by any qualiﬁed service technician.

Contact your dealer or the Nady Customer

Service Department for details.

Using More Than One ALD-800 System

You may operate up to three ALD-800

systems in the same location. For multiple

system operation, please observe:

If operating two ALD-800 transmitters in•

the same location, use Ch. AA and HH

(or GG).

If operating three ALD-800 transmitters•

in the same location, use Ch. AA, EE

and HH (or GG).

Locate the transmitters ten feet or more

away from the performers wearing

ALD-800 receivers.

ALD-800 Transmitter (Front Panel)

ALD-800 Transmitter (Rear Panel)

5 8 1

2 3

ALD-800 Receiver Operating Instructions

Pocket-sized RF receiver for personal

listening assistance.

Any number of ALD-800 receivers can be•

used with a single ALD-800T transmitter

Ultra compact and lightweight•

Preset to one of eight auditory•

assistance channels

Provides up to 130 dB SPL for•

hearing assistance

Volume control adjust•

Antenna integral with earphone cord•

Mini binaural EB-800 earbud•

earphones included

LED “power on” indicator•

Accepts standard 9V alkaline battery•

Powering The Receiver

Install a 9V battery in Battery Compartment

(1), observing polarity. To preserve battery

life, always turn the ALD-800 receiver off

when it is not in use. When the sound

becomes weak or distorted, replace the

battery. The number of hours of operation

per battery is as follows: carbon zinc type

battery: 10-12 hours; alkaline battery

(recommended): 17-20 hours.

Channel Selection

Your receiver is pre-tuned at the factory

to the same channel as your transmitter.

Should you wish to have your transmitter

channel changed, as explained in the

Transmitter Operating Instructions section

of this manual, you must also have your

receiver(s) retuned as well. Contact the

Nady Customer Service Department

for details.

Using the ALD-800 Earphones

Plug the included earphones into the

Earphone jack (2) on top of the receiver.

The earpads can be ordered separately,

and since they cost very little, you may wish

to dispose of them after use. However, the

earpads can be replaced and reused after

being washed in a mild detergent, rinsed

and air dried.

Operating the Receiver

While wearing your earphones, stand near

the ALD-800 transmitter. Turn the receiver

on by rotating the Off/On/Volume wheel (3).

The Power On indicator (4) will go on. (To

turn the receiver off, rotate the Off/On/

Volume wheel until it clicks, and the

“Power On” indicator will go out.) Listen for

your program source, and adjust receiver

volume to a comfortable listening level.

Note: A slight buzzing may be heard if the receiver

is used within six feet of the transmitter.

This is normal and does not affect performance.

For best performance, keep the receiver and

the transmitter at least ten feet apart.

Adjusting Earphones Volume

Listen for your program source, and

adjust receiver volume to a comfortable

listening level.

Note: A slight hum may be heard if the receiver

is used within six feet of the transmitter.

This is normal and does not affect performance.

Testing Receiver Range

Wearing your receiver and earphones,

walk around your seating area and listen for

audio quality. In certain areas of the room

the audio may disappear or “drop out.”

This is a normal occurrence whenever radio

signals are transmitted inside a building.

If you step away from the “drop out” zone,

the audio will return.

ALD-800 Receiver (Front Panel) ALD-800 Receiver (Top Panel)

4 3

Architects and Engineering Speciﬁcations

ALD-800 Transmitter

The transmitter operates on the 72-76 MHz

auditory assistance frequencies. Transmitted

ﬁeld strength shall not exceed 8000 µV/m

at 30 meters. The operating frequency is

factory selectable to eight different channels

by means of an internal switch.

Maximum FM deviation should not exceed

75 KHz. Transmitter signal pre-emphasis is

75 µS. Frequency stability is controlled by a

phase locked loop synthesizer with crystal

reference and accurate within ±.005% over

0-50 degrees C. The transmitter provides

a permanently mounted telescoping whip

antenna.

The FCC approved transmitter is powered

by a UL and CSA listed AC wall transformer

providing 9V DC input to the transmitter

via a 3.5mm DC jack. The transmitter

includes a 1/4” line-in jack, mounted on

the rear panel, and 1/4” electret condenser

microphone jack with 9V DC power

(at 1.0 mA), mounted on the front panel.

Also included, is an adjustable audio

level control and a red LED “Power On”

indicator. The model number is ALD-800.

ALD-800 Receiver

The receiver operates on a single frequency

in the 72-76 MHz auditory assistance

band. Frequency stability is controlled by a

phase locked loop synthesizer with crystal

reference and accurate within ±.005% over

0-50 degrees C. The receiver de-emphasis

is 75 µS. The receiver provides a 3.5 mm

headphone output jack mounted on the

top panel.

The receiver is powered by a 9V alkaline

battery. The receiver has an Off/On/Volume

control mounted on the top panel, LED

lamp to indicate battery strength, and an

antenna shall be integral to the earphone/

earbud cord. The receiver model number is

ALD-800.

Speciﬁcations

OVERALL SYSTEM PERFORMANCE

Frequency Response 100 Hz-15KHz ± 3 dB

Signa-to-Noise Ratio 60 dB

Total Harmonic Distortion < 0.5%

RF Carrier Frequencies Eight channels between 72-76 MHz

Channel AA:72.1, BB: 72.3, CC: 72.5, DD: 72.7,

EE: 72.9, FF:75.5, GG: 75.7, HH: 75.9

Frequency Stability Better than .005%

Modulation FM ± 75 KHz max

Operating Range Up to 300 feet line-of-sight

ALD-800 TRANSMITTER

Mic Input Connector: 1/4“ phone jack.

Impedance: low impedance,

unbalanced, with 9V DC at 1 mA for condenser mic.

Line Input Connector: 1/4“ phone jack.

Impedance: 100 K Ω,

unbalanced.

Power Output 80,000 µV @ 3 meters

Controls Power on/off, audio input gain adjust

Indicators Power On LED, Audio Modulation LED

Antenna Permanently mounted telescoping whip

Power Requirement 9 VDC, regulated @200 mA, AC-ALD800 adapter provided

Dimensions 1.25” H, 8.25” W, 4.25” D (3.175 x 20.9 x 10.8 cm)

Weight 18.2 oz. (500 g.)

ALD-800 RECEIVER

Controls Combination volume/on-off wheel

Audio Output 250 mW max into 16 ohms

Connectors 3.5 mm mini jack for earphone output

Earphones Mini binaural earbuds

Antenna Integral with earphone cord

Indicators LED power on indicator

Sensitivity 2 µV for 12 dB Sinad with squelch defeated

Squelches at 10 µV for min. 50 dB S-N ratio

Mute Threshold 8-10 µV

Power Requirement 9V alkaline

Battery Life 17-20 hours w/alkaline battery

Dimensions 3.35” H, 2.75” W, .75” D (8.5 x 6.5 x 2.25 cm)

Weight 2.65 oz. w/out battery (73 g.)

Speciﬁcations subject to change at any time without prior notice for purposes of product improvement

Service Information

In the U.S. If you are experiencing operational problems with your system, please refer to

the Support page at www.nady.com for assistance. Should your wireless system require

service, please contact the Nady Service Department at (510) 652-2411 to obtain a Return

Authorization (R/A) Number and service quote (if out of warranty). Make sure the R/A

Number is clearly marked on the outside of the package that you are returning.

If your unit is out of warranty, please enclose a cashier’s check or money order (or pay

by credit card) per instructions by the Nady Service Department. Ship your unit prepaid

to: Nady Systems, Service Department, 6701 Shellmound Street, Emeryville, CA 94608.

Include a brief description of the problem you are experiencing. For service of a unit under

warranty, please follow the instructions in the following section.

Outside the U.S. For service or warranty matters please contact the Nady distributor in your

country through the dealer/store from which you purchased this product.

Do not attempt to service this unit yourself as

it can be dangerous and will also void the warranty.

One-Year Limited Warranty

Nady Systems, Inc. warrants to the original consumer purchaser (U.S.A only) that the unit is free from

any defects in material or workmanship for a period of one year from the date of original retail purchase.

If any such defect is discovered within the warranty period, Nady Systems, Inc. will repair or replace the

unit free of charge, subject to veriﬁcation of the defect or malfunction upon return to Nady Systems.

Please do not return your Nady product to the store where it was purchased as Nady Systems handles

your warranty service directly. Communication with our Service Department is the most efﬁcient means

of servicing your unit and we are dedicated to keeping you a satisﬁed customer.

To the extent permitted by law, any applicable implied warranties, including warranties of merchantability

and ﬁtness are hereby limited to one year from the date of purchase. Consequential or incidental

damages resulting from a breach of any applicable express or implied warranties are hereby excluded.

This warranty is in lieu of all other agreements and warranties, general or special, express or implied

and no representative or person including a Nady dealer, agent, or employee is authorized to assume

for us any other liability in connection with the sale or use of this Nady Systems’ product.

Whereas some states do not allow limitations on how long implied warranties last, and do not allow

exclusion of incidental or consequential damages, the above limitations and exclusions may not apply

to you. This warranty gives you speciﬁc legal rights and you may also have other rights which may vary

from state to state.

This warranty is subject to the following conditions:

1) This system must have been purchased from an authorized Nady dealer and all warranty

service must be performed by Nady’s service department. Any service not performed by Nady

will automatically void this warranty.

2) Items not covered: physical damage resulting from improper handling of the unit in transit from the

factory by the shipper (Nady Systems is not responsible for such damage and all such claims must be

made against the shipping company by the consignee); defects caused by normal wear of the product

(expendable parts are typically connectors, cables, potentiometers, switches and similar components);

damage or defects caused by abuse, neglect, accident, failure to connect or operate the unit in any way

that does not comply with applicable technical or safety regulations, or improper repair, excessive heat

or humidity, alteration or unreasonable use of the unit, causing cracks, broken cases/housings or parts;

damage caused by leaking batteries; ﬁnish or appearance items; items damaged in shipment en route to

Nady Systems, Inc. for repair. The warranty is null and void if any Nady serial number has been removed

or defaced.

How To Obtain Service:

1) If factory service is required, please contact our Service Department at (510) 652-2411 for a return

authorization (R/A) number. Make sure the R/A number is clearly marked on the outside of your package.

(Please note: if an R/A number is not included, our Shipping Department cannot accept your package.)

2) Send the unit back to Nady Systems, 6701 Shellmound Street, Emeryville, CA, 94608, freight pre-paid.

You must include proof of date and place of purchase (i.e., photocopy of your bill of sale) or Nady cannot

be responsible for repair or replacement. Nady Systems, Inc. will not repair, nor be held responsible,

for any units returned without proper identiﬁcation, return address, and R/A number clearly marked

on the package.

3) Per the above, Nady will perform all warranty service and return the unit to you at no charge.

Nady Systems will inform the buyer if product sent in does not meet the terms of this warranty

and will provide a quote for ﬁxing the unit and/or shipping it back exclusively at the buyer’s expense.

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