Audio Technica ATW-0327, ATW-0328 Installation And Operation Manual

300 Series Professional
VHF Wireless Systems

ATW-0327 UniPak™Transmitter System
ATW-0328 Handheld Dynamic Microphone System

Installation and Operation

2

Introduction

Thank you for choosing an Audio-Technica professional wireless system. You have joined
thousands of other satisfied customers who have chosen our products because of their quality,
performance and reliability. This wireless microphone system is the successful result of years of
design and manufacturing experience.

Each professional wireless system includes a receiver and either a body-pack or a handheld
transmitter on a specific crystal-controlled frequency.

The versatile UniPak™body-pack transmitter has both low- and high- impedance inputs plus
a bias connection, for use with dynamic and electret condenser microphones, as well as Hi-Z
instrument pickups. Both the handheld and UniPak transmitters use internal 9-volt batteries and
have Off/Standby/On switches, battery condition indicators, and battery-save switches.

Please note that in a multi-channel application, there must be a transmitter-receiver combination
on a

separate

frequency for each input desired (only one transmitter for each receiver). Because
the wireless frequencies are in or near VHF TV frequencies, only certain wireless frequencies are
useable in a particular geographic area. (Frequency selection information will be found on
pages 8 and 9.)

CAUTION! Electrical shock can result from removal of the receiver cover. Refer servicing to
qualified service personnel. No user-serviceable parts inside. Do not expose to rain or moisture.

The circuits inside the receiver and transmitter have been precisely adjusted for optimum
performance and compliance with federal regulations. Do not attempt to open the receiver
or transmitter. To do so will void the warranty, and may cause improper operation.

Notice to individuals

with implanted cardiac pacemakers or AICD devices:

Please read the cautionary notice on back cover before operating this or any other source of
RF (radio frequency) energy.

This device complies with part 15 of the FCC Rules. Operation is subject to the condition that
this device does not cause harmful interference.

This device complies with INDUSTRY CANADA R.S.S. 210, en conformité avec IC: RSS­210/CNR210. Operation is subject to the following conditions: 1) This device may not cause
harmful interference and 2) this device must accept any interference received, including
interference which may cause undesired operation.

Installation and Operation

Receiver Installation

Location

For best operation the receiver should be at least 3' above the ground and at least 3' away from a
wall or metal surface to minimize reflections. The transmitter should also be kept at least 3' away
from the receiver.

Keep the antennas away from noise sources such as digital equipment, motors, automobiles and
neon lights, as well as large metal objects.

Output Connection

The receiver provides unbalanced, aux-level output from a 1/4" phone jack; output cable is not
included. Use a shielded audio cable with 1/4" phone plug to connect the receiver’s AF Out jack
to the mixer/amplifier’s aux-level input.

Power Connection

Turn the receiver’s volume control all the way down. Connect the included AC adapter to the
DC power input on the back of receiver. (Note that the receiver has no power off/on switch. The
receiver will be on whenever the AC adapter is connected and plugged into the AC outlet. Unplug
the AC adapter from the AC outlet whenever the system is not in use – both for safety, and to
conserve energy.)

Antennas

A novel “dipole” antenna system on the receiver improves operation by providing a “ground”
element in addition to the usual “signal” element. While holding the telescoping antennas at their
base, fully extend each of them. Position the rear-most (signal) antenna vertically and the front
(“ground”) antenna horizontally, in the shape of an “L” (Fig A).

Do not move either antenna beyond

vertical (to the left of straight-up).

To do so may damage the antenna and/or receiver.

For best performance, locate the receiver so its vertical antenna is in direct line-of-sight to the
transmitter’s likely operating position.

3

Fig. A

Lift the white “battery keeper” arm until it sticks straight out from the mic body (no higher). Then
carefully insert a fresh 9-volt alkaline battery, observing correct polarity as marked inside the battery
compartment. The transmitter housing is designed to prevent incorrect installation of the battery.

Do not force the battery in.

Move the white arm down until it presses on the battery, then slide the lower body portion back
up until it covers the battery and engages the threads of the upper body. Screw the body back
together; do not overtighten.

Move the power switch on the bottom of transmitter to “On” and make certain the red battery
condition indicator is strongly illuminated.
Return the power switch to the “Off” position.

Battery Condition Indicator

The red battery condition indicator (Fig. E/F) should light strongly with a fresh battery. As the
battery weakens, the indicator will grow dimmer. When the indicator becomes very dim or
goes out, there is little life left in the battery. Replace it at once for continued operation of
the transmitter.

All transmitters feature battery-save switches (Fig. B/D). As supplied, the switch is set in the High
position for maximum range. Switching to the Low position increases battery life by reducing
power. (Note: Effective range decreases when the switch is set in the Low position.)

UniPak™Transmitter Input Connection

Connect an audio input device (microphone or guitar cable) to the input connector on the bottom
of the transmitter.

A number of Audio-Technica professional microphones and cables are available separately,
pre-terminated with a UniPak input connector (see “Optional System Accessories” on page 11).

Transmitting Antenna

The UniPak transmitter includes a permanently-attached flexible antenna. For best results, allow
the antenna to hang freely and full length from the bottom of the transmitter. If the received signal
is marginal, experiment with different transmitter positions on your body or instrument; or try
repositioning the receiver.

Do not attempt to remove, replace or change the length of the

transmitting antenna.

5

Fig. E Fig. F

BATT.

ON OFF

ST.BY

INPUT POWER BATT. ANT

OFF

ONST

Battery Condition

Indicator

Power Switch

On/Standby /Off

Battery Condition

Indicator

Input

Connector

Power Switch

Off/Standby /On

Antenna

Transmitter Setup

Battery Selection

An alkaline 9-volt battery is recommended.

UniPak™Transmitter Battery Installation

Make certain the power switch on the bottom of transmitter is in the “Off” position.
Slide off the battery cover as shown in Figure B.

4

Carefully insert a fresh 9-volt alkaline battery, observing correct polarity as marked inside the
battery compartment. The transmitter housing is designed to prevent incorrect installation of the
battery.

Do not force the battery in.

Replace the battery cover (Fig. C).

Move the power switch to “On” and make certain the red battery condition indicator is strongly
illuminated.

Return the power switch to the “Off” position.

Handheld Transmitter Battery Installation

Make certain the power switch on the bottom of transmitter is in the “Off” position.
While holding the upper part of the transmitter body just below the ball-screen, unscrew the lower

body and slide it downward to expose the battery compartment (Fig. D).

Do not attempt to pull the

lower body farther down, or to gain access to the electronics.

Fig. B

Fig. C

TRANSMITTER

UniPak™

Battery Polarity

Diagram

Battery-Save Switch

(under screwdriver clip)

Guitar Trimmer

(GT)

Microphone

Trimmer (MT)

Fig. D

Battery Polarity

Diagram

Battery-Save

Switch