Nady ALD-800 operating instructions

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OWNER'S MANUAL

ASSISTIVE LISTENING SYSTEM

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Multi Channel RF Wireless

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 counterclockwise. 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

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Congratulations on your purchase of the Nady ALD-800 Wireless RF Personal Listening Assistance
System. 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.

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ALD-800 RECEIVER OPERATING INSTRUCTIONS

ALD-800 RECEIVER

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 10 feet apart.

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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.

*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)

7 Mic Input

6 Audio Modulation LED

2 Power Switch 3 “Power On” LED

4 Antenna

5 Line In Jack 8 Input Gain Adjust 1 9V DC Jack

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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.

OVERALL SYSTEM PERFORMANCE

Frequency Response ..........100 Hz-15KHz ± 3 dB

Signal 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

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ALD-800 Receiver (Front Panel)

ALD-800 Receiver (Top Panel)

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.

NADY ALD-800 RECEIVER

2 Earphone Jack

4 Power On LED

3 ON/OFF

Volume

1 Battery Compartment - On Bottom

NADY SYSTEMS, INC. • 6701 SHELLMOUND STREET, EMERYVILLE, CA 94608

Tel: [phone] • Fax: [phone] • www.nadywireless.com

SERVICE FOR YOUR NADY WIRELESS PRODUCT

(U.S.) Should your Nady ALD-800 Assistive Listening System require product service,

please contact the Nady Service Department via telephone at [phone], or e-mail
at [e-mail] for a Return Authorization (R/A) Number and a service
quote (if out of warranty). Make sure the R/A Number is clearly marked on the outside of
the package that you send in and enclose a cashier’s check or money order (if not pre­paid with a credit card). Ship the unit prepaid to: Nady Systems, Inc., Service
Department, 6701 Shellmound Street, Emeryville, CA 94608. Include a brief description
of the problem you are experiencing.

The warranty card enclosed with this system contains additional valuable warranty
and service information. Keep it in a safe place for possible future reference. Do
not attempt to service this unit yourself as it can be dangerous and will also void
the warranty.

(International) For service, please contact the Nady distributor in your country through

the dealer from whom you purchased this product.

Nady wireless systems are type accepted under FCC rules
parts 90, 74 and 15.

This device complies with RSS-210 of Industry & Science
Canada. Operation is subject to the following two conditions: (1)
this device may not cause harmful interference and (2) this
device must accept any interference received, including interfer­ence that may cause undesired operation.