System Operation

Switch on the receiver. Do not switch on the transmitter yet.

Selecting/Setting Frequency

It’s usually best to start by setting the receiver’s frequency to determine there is no local interference on that frequency. Then, always make certain to set the transmitter to the receiv- er’s exact frequency. The receiver’s Tone Lock system squelch- es the audio only, permitting any RF energy on the frequency to show on the “RF” bar-meter.

Receiver On…

The Power switch indicator and the LCD window will light up, the normal-operation LCD display will appear after 1-2 seconds (Figure D). If any of the bars show in the “RF” bar-graph meter, there may be RF interference in the area. If this occurs, select another frequency as explained below.

How to Make Setting Changes

A. Select Frequency Manually

1.From the normal operating mode, press and hold the set button until display flashes.

2.To select frequency, press CH SELECT/SCAN button once at a time until desired channel is displayed (1 to 9, A to F).

3.(a) To select frequency, press and hold SET button until display stops flashing.

(b) To cancel frequency selection, simply press the SET button once. The receiver then returns to the normal operation.

B. Select Open Frequency Scan Function

1.From the normal operating mode, press and hold the set button until display flashes.

2.To select scan function, press and hold CH SELECT/SCAN button, continue to hold until available frequency is automatically displayed.

3.(a) To select frequency, press and hold SET button until display stops flashing.

(b) To cancel frequency selection, simply press the SET button once. The receiver then returns to the normal operation without making any changes.

Setting Transmitter Frequency

ATW-T161

Slide the Battery cover off and use screwdriver provided to set the channel switch to the same channel selected on the receiv- er.

ATW-T162, ATW-T163

While holding the upper part of the transmitter body just below the ball-screen, unscrew lower body cover, slide downward and remove to expose battery compartment.

Use screwdriver provided to set the channel switch to the same channel selected on the receiver.

Receiver Squelch

The 1600 Series employs a Tone Lock squelch system that pro- vides enhanced rejection of RF interference. The squelch control on the front panel of the receiver is preset at the factory, but can be adjusted if you are using the system in a high RF inter- ference area. This adjustment can cause a reduction in the use- able range of the wireless transmitter, so set the control to the lowest position which reliably mutes the unwanted RF signals.

Input Level Adjustment

An input trimmer control (Trim) in the transmitters enables you to maximize performance for a particular microphone or guitar sensitivity, or to adjust for different acoustic input levels.

CAUTION! The small trimmer controls are delicate; use only the supplied screwdriver. Do not force the trimmers beyond their normal 190o range of rotation.

Return the screwdriver to its storage clip when not in use.

Setting Levels

Correct adjustment of transmitter audio input, receiver audio output, and mixer/amplifier input and output levels is important for optimum system performance.

Adjusting Input Level - UniPak Transmitter

Slide the battery cover off the top part of transmitter and remove the screwdriver from its clip (Figure E). Gently turn the "MT" (mic trimmer) and "GT" (guitar trimmer) control to their full counterclockwise positions (marked “Lo”).

•Microphone: Adjusting input level

While speaking/singing into the microphone at typically-loud levels, carefully turn the MT control clockwise while watching the receiver’s AF Level indicator. Increase the Trim control setting until the maximum audio output of the mic lights about three or four units on the receiver's AF Level indicator. Do not set the level too high. At normal audio levels, only the first two or perhaps three units should light.

(When using a microphone, return the GT control setting to minimum)

•Guitar/Instrument: Adjusting input level

While playing at typically-loud levels, carefully turn the GT control clockwise while watching the receiver’s AF Peak indicator. Increase the Trim control setting until the maximum audio output of the mic lights about three or four units on the receiver's AF Level indicator. Do not set the level too high.

After adjusting input level, return the screwdriver to its clip and reinstall the battery cover. No further transmitter gain adjust- ments should be needed, as long as the input device and the acoustic input level are not changed.