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.