Nady Systems ALD-800 Owner's Manual - page 3
5
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 rotat-
ing 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.
4
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 flash-
ing, 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 opera-
tion, 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