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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 Trans mit ter
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 Pow er 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 un bal anced 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 mi cro phone, and 9V
DC power is present at the input jack. If you wish
to use a con ven tion al 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 bright ness as the control is turned
clockwise, and decrease in brightness
as the control is turned coun ter clock-
wise. When the “TX” LED is flashing
during transmission, the trans mit ter 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 ex plained in the receiver
instructions, which follow.
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