Nady Systems PDAs Smartphones ALD 800 User Manual

O w n e r ’ s M a n u a l  
ALD-800  
Multi-Channel rF wireless  
assistive listening system  
 
ALD-800 Transmitter  
Compact RF transmitter operating within  
an unbalanced line level audio source at  
the 72-76 MHz band designated for auditory 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.  
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  
using a Microphone  
The Mic jack (7) on the front panel allows  
AC-ALD800 9VDC regulated power  
supply adapter supplied  
LED power on and audio  
modulation indicators  
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.  
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.  
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.  
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  
3
 
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.  
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).  
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.  
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.  
Channel selection  
Channel selection is controlled by  
DIP-switches inside the transmitter.  
The system is preset at the factory.  
alD-800 Transmitter (Front Panel)  
7
6
2
3
alD-800 Transmitter (rear Panel)  
4
5
8
1
4
 
ALD-800 Receiver Operating Instructions  
Pocket-sized RF receiver for personal  
listening assistance.  
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.  
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  
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  
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.  
“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  
Channel selection  
Listen for your program source, and  
adjust receiver volume to a comfortable  
listening level.  
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.  
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.  
5
 
alD-800 receiver (Front Panel)  
alD-800 receiver (Top Panel)  
2
4
3
1
6
 
Architects and Engineering Specifications  
alD-800 Transmitter  
alD-800 receiver  
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.  
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.  
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 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.  
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.  
7
 
Specifications  
OVerall sysTeM PerFOrManCe  
Frequency response  
signa-to-noise ratio  
Total Harmonic Distortion  
rF Carrier Frequencies  
100 Hz-15KHz 3 dB  
60 dB  
< 0.5%  
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  
Better than .005%  
Frequency stability  
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.  
Connector: 1/4“ phone jack.  
line Input  
Impedance: 100 K ,  
unbalanced.  
Power Output  
Controls  
Indicators  
80,000 µV @ 3 meters  
Power on/off, audio input gain adjust  
Power On LED, Audio Modulation LED  
Permanently mounted telescoping whip  
9 VDC, regulated @200 mA, AC-ALD800 adapter provided  
1.25” H, 8.25” W, 4.25” D (3.175 x 20.9 x 10.8 cm)  
18.2 oz. (500 g.)  
antenna  
Power requirement  
Dimensions  
weight  
alD-800 reCeIVer  
Controls  
Combination volume/on-off wheel  
250 mW max into 16 ohms  
3.5 mm mini jack for earphone output  
Mini binaural earbuds  
Integral with earphone cord  
LED power on indicator  
2 µV for 12 dB Sinad with squelch defeated  
Squelches at 10 µV for min. 50 dB S-N ratio  
8-10 µV  
audio Output  
Connectors  
earphones  
antenna  
Indicators  
sensitivity  
Mute Threshold  
Power requirement  
Battery life  
Dimensions  
weight  
9V alkaline  
17-20 hours w/alkaline battery  
3.35” H, 2.75” W, .75” D (8.5 x 6.5 x 2.25 cm)  
2.65 oz. w/out battery (73 g.)  
Specifications subject to change at any time without prior notice for purposes of product improvement  
8
 
Service Information  
In the u.s. If you are experiencing operational problems with your system, please refer to  
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.  
9
 
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.  
10  
 
 
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6701 Shellmound Street Emeryville, CA USA 94608  
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T 510.652.2411 F 510.652.5075 www.nady.com  
 

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