200 Series Professional

VHF Wireless Systems

ATW-251 Options

ATW-251/G Guitar

ATW-251/H Active

ATW-251/L Presenter

ATW-252 Vocal

0891

!

Installation and Operation

Antennas

Figure A

(p. 3)

Receiver Controls and Functions

Figure B

- Front panel controls and functions

1a 2 3 4 1b

Figure C

- Rear panel controls and functions

5 6 7 8

2

Microphone

Trimmer (MT)

Guitar Trimmer

(GT)

Transmitter Controls and Functions

➞

Battery-Save Switch

(under screwdriver clip)

Figure D

Battery Polarity

Diagram

Figure E

Battery Polarity

Diagram

Figure F

Battery-Save

Switch

Gain Trimmer

Figure G

Power Switch

Off/Standby/On

Battery Condition

Indicator

Input

Connector

Figure H

INPUT

OFF ST ON

POWER BATT. ANT

Antenna

Screwdriver

Figure I

Battery Condition

Indicator

BATT.

ON

ST.BY

OFF

Power Switch

On/Standby/Off

➞

3

4

Professional VHF Wireless Systems

Installation and Operation

This device complies with the European R&TTE 1999/5/EC

Directive.

Operation is subject to the condition that this device does not cause harmful interference.

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:

Any source of RF (radio frequency) energy may interfere with normal functioning of the implanted device. All wireless microphones have low-power transmitters (less than 0.05

watts output) which are unlikely to cause difficulty, especially if they are at least a few inches away. However, since a

“body-pack” mic transmitter typically is placed against the body, we suggest attaching it at the belt, rather than in a shirt pocket where it may be immediately adjacent to the medical device. Note also that any medical-device disruption will cease when the RF transmitting source is turned off. Please contact your physician or medical-device provider if you have any questions, or experience any problems with the use of this or any other RF equipment.

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 200 Series professional VHF wireless system includes a receiver and either a body-pack transmitter or a handheld microphone/transmitter on a specific crystal-controlled frequency. ATW-T201 UniPak ™ body-pack transmitter systems include models pre-packaged with an AT8319 guitar cable (/G), a PRO 8HEcW headworn microphone (/H), or a lavalier mic (/L) for particular applications. All A-T Wireless

Essentials ® microphones and cables, available separately, are pre-terminated for use with any 200 system.

Because 200 Series packaging is designed to hold all versions of the system, some compartments in the carton are intentionally left empty.

The versatile ATW-T201 UniPak body-pack transmitter has both a high-impedance input for instruments, and a low-impedance input with bias connection for use with dynamic and electret condenser microphones. The ATW-T202 handheld transmitter features a unidirectional dynamic microphone element.

Both the body-pack and handheld transmitters use internal

9-volt batteries and have Off/Standby/On switches, input Trim

(level) adjustments and battery-save switches.

About RF Interference:

Please note that wireless frequencies are shared with other radio services

Please make certain, that you follow the national regulations of the country where you are planning to use the system

If you need help with operation or frequency selection, please contact your local dealer or Audio Technica. Extensive wireless information is also available on www.audio-technica.com.

See pages 2-3 for illustrations.

Location

For best operation the receiver should be at least 3' (1 m) above the ground and at least 3' (1 m) away from a wall or metal surface to minimize reflections. Keep the receiver antennas away from noise sources such as digital equipment, motors, automobiles and neon lights, as well as away from large metal objects. In multi-channel systems, position receivers at least 3' (1 m) apart and keep operating transmitters at least 6' (2 m) from the receivers to help assure maximum RF performance.

Output Connection

The receiver provides unbalanced, aux-level output from a 1 /

4

"

TS (“mono”) phone jack; an 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

Connect the DC plug on the included AC power adapter to the

DC power input on the back of the receiver. Secure the cord over the cord hook on the back of the receiver, to keep the plug from being detached by an accidental tug on the cord.

Then plug the adapter into a standard 230 Volt 50 Hz AC power outlet.

Receiver Installation

Antennas

A novel “dipole” antenna system on the receiver improves operation by providing a “ground” element in addition to the usual “signal” element. Position the two antennas at 90° in the form of a “V,” or position the left (“signal”) antenna vertically and the right (“ground”) antenna horizontally, in the shape of an “L” (Fig. A). Use the position that performs better in your operating environment. Be certain to extend both antennas to their full 15" (38 cm) length by holding them at their bases and pulling out on their caps. Both antenna elements may be swiveled to the left and right, but do not attempt to rotate them in a screwing/unscrewing motion. To do so may damage the antenna and/or receiver. For best performance, locate the receiver so its antennas are in direct line-of-sight to the transmitter's likely operating position.

(Note that the receiver has no power Off/On switch. The receiver will be energized whenever the power adapter is connected and plugged into the AC outlet. Unplug the power supply from the AC outlet when the system is not in use – both for safety, and to conserve energy.)

Receiver Controls and Functions

Front Panel Controls and Functions (Fig. B)

1.

ANTENNAS: Position the “signal” antenna (1a) and

“ground” antenna (1b) as shown in Figure A.

2.

POWER INDICATOR: Lights when power is supplied to the receiver.

3.

RF INDICATOR: Lights to show presence of transmitter signal.

4.

AF PEAK INDICATOR: Only lights when audio distortion is present at maximum modulation. Not affected by position of Volume control.

Rear Panel Controls and Functions (Fig. C)

5.

AUDIO OUTPUT JACK: 1 /

4

" TS (Tip-Sleeve) or “mono” phone jack. Use a shielded cable to connect to an unbalanced aux-level input of a mixer or amplifier.

6.

VOLUME CONTROL: Adjusts the audio level at the 1 /

4

" output jack. Does not affect AF Peak indicator.

7.

CORD HOOK: Loop the cord around the cord hook to keep the DC plug from pulling out accidentally.

8.

POWER INPUT JACK: Connect the DC plug from the included AC adapter.

5

Battery Selection and Installation

An alkaline 9-volt battery is recommended. Make certain the transmitter power switch is Off before installing or changing batteries.

When inserting the battery, observe correct polarity as marked inside the battery compartment. The transmitter housings are designed to prevent incorrect installation of the battery; do not force the battery in. Reversed batteries may cause damage to the transmitter.

UniPak ™ Transmitter Battery Installation

1. Slide off the battery cover as shown in Figure D.

2. Carefully insert a fresh 9V alkaline battery, observing polarity markings.

3. Replace the battery cover (Fig. E).

Handheld Transmitter Battery Installation

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

(Fig. F). Do not attempt to pull the lower body farther down, or to gain access to the electronics.

2. Lift the white “battery keeper” arm until it sticks straight out from the mic body (no higher). Then carefully insert a fresh

9V alkaline battery, observing polarity markings.

3. Screw the body back together. Do not overtighten.

Battery Condition Indicator

The red battery condition indicator (Fig. H/I) 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. D/F). 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 Low position.)

Transmitter Setup

UniPak ™ Transmitter Input Connection

Connect an audio input device (microphone or guitar cable) to the input connector on the bottom of the transmitter. The cable connector latches automatically when inserted into the transmitter jack. To unlatch and remove the connector, simply pull up on the connector’s knurled metal collar.

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 9).

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.

6

See pages 2-3 for illustrations.

Turn down the receiver volume control and the mixer/amplifier level before starting up the wireless system. Do not switch on the transmitter yet.

Receiver on...

Plug the power supply into an AC power source. The green

Power indicator on the front panel will light.

Transmitter on...

When the transmitter is switched on, the receiver’s yellow RF signal indicator will light. The transmitters have a 3-position power switch. When the switch is set to “Standby” (ST or

ST.BY), the transmitter produces RF with no audio signal. When the switch is “On,” the transmitter produces both RF and audio. Excessive audio input to the transmitter will cause the receiver’s red AF Peak indicator to light.

Receiver Volume

Under typical operating conditions, the receiver's volume control should be turned all the way up, with overall system audio gain adjusted at the mixer or amplifier.

Input Level Adjustment

Input trimmer controls in the transmitters enable you to maximize performance for a particular microphone or guitar sensitivity, or to adjust for different acoustic input levels.

Adjusting Input Level - UniPak Transmitter

Slide the battery cover off the top part of transmitter and remove the screwdriver from its clip (Fig. D). Gently turn both the “MT” (Mic Trimmer) and “GT” (Guitar Trimmer) controls to their full counterclockwise positions (toward “LO”).

• Microphone: Adjusting input level

Gently turn only the “MT” (Mic Trimmer) control all the way up (clockwise, toward “Hi”). Check for excessive gain by speaking/singing into the microphone at typically loud levels while watching the receiver’s AF Peak indicator. If the AF Peak indicator does light, turn the MT control slightly counterclockwise until the AF Peak indicator no longer lights with maximum audio input to the transmitter.

System Operation

• Guitar: Adjusting input level

Gently turn only the “GT” (Guitar Trimmer) control all the way up (clockwise, toward “Hi”). Check for excessive gain by playing at typically loud levels while watching the receiver’s AF

Peak indicator. If the AF Peak indicator does light, turn the GT control slightly counterclockwise until the AF Peak indicator no longer lights with maximum instrument input to the transmitter.

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

Adjusting Input Level - Handheld Transmitter

Unscrew the lower body cover and slide it downward, exposing the screwdriver and Gain Trimmer control (Fig. G). Remove the screwdriver from its clip. Gently turn the control to its full clockwise position (toward the side marked “H”), the factory setting. Check for excessive gain by speaking/singing into the microphone at typically-loud levels while watching the receiver’s

AF Peak indicator. If the AF Peak indicator does light, turn the

Gain Trimmer control slightly counterclockwise until the AF

Peak indicator no longer lights with maximum audio input to the mic/transmitter.

Return the screwdriver to its clip and close and secure the lower body. No further transmitter gain adjustments should be needed, as long as the acoustic input does not change significantly.

CAUTION!

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

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

Ten Tips To Obtain The Best Results

1. Use only fresh alkaline batteries. Do not use “general purpose”

(carbon-zinc) batteries.

2. Position the receiver so that it has the fewest possible obstructions between it and the normal location of the transmitter.

Line-of-sight is best.

3. The transmitter and the receiver should be as close together as conveniently possible, but not less than 6' (2 m).

4. Do not place the receiver antennas within 3' (1 m) of another receiver or antenna.

5. The receiver antennas should be kept away from any metal.

6. A receiver cannot receive signals from two transmitters at the same time.

7. In the UniPak transmitter, the “MT” or “GT” input control not in use should be set to minimum.

8. If the receiver output is set too low, the overall signal-to-noise ratio of the system may be reduced. Conversely, if the volume control of the receiver is set too high, it may over-drive the input of the mixer/amplifier, causing distortion. Adjust the output level of the receiver so the highest sound pressure level going into the microphone (or the loudest instrument playing level) causes no input overload in the mixer, and yet permits the mixer level controls to operate in their “normal” range (not set too high or too low). This provides the optimum signal-to-noise for the entire system.

9. Turn the transmitter off when not in use. Remove the battery if the transmitter is not to be used for a period of time.

10. Unplug the receiver from the AC outlet when the system is not in use.

7

System Operating Frequencies

Frequency Selection

Each transmitter/receiver system operates on a single factory aligned, crystal-controlled frequency. Available frequencies are shown in the chart below.

The frequency of each transmitter appears on a label on the outside of the unit. The frequency of each receiver appears on a label on the rear panel of the unit and the frequency of each system appears on the outer carton. For future reference, please record them in the space provided below.

RF Interference

Please note that wireless frequencies are shared with other radio services. According to national regulations, “Wireless microphone operations are unprotected from interference from other licensed operations within the band. If any interference is received by any Government or non-Government operation, the wireless microphone must cease operation...”

If you need assistance with operation or frequency selection, please contact your dealer or the A-T professional division.

Extensive wireless information also is available on the A-T Web site at www.audio-technica.com.

Freq. (MHz)

173.800 MHz 174.600 MHz 175.000 MHz

Systems on these frequencies may be combined for up to three simultaneous operating channels.

For future reference, please record your system information here

(the serial numbers appear near the screwdriver clip in each transmitter, and on the bottom of each receiver):

Operating Frequency

Frequency • MHz

Receiver

Model ATW-R250

Transmitter

Model ATW-T20

1/2

Serial Number

Serial Number

8

Specifications

†

OVERALL SYSTEM

Operating Frequency

Frequency Stability

Modulation Mode

Maximum Deviation

Operating Range

VHF high band, 173 MHz to 175 MHz

±0.005%

FM

±15 kHz

70m typical

Operating Temperature Range 40° F (4° C) to 110° F (43° C)

Frequency Response 80 Hz to 13 kHz

RECEIVER

Receiving System

Image Rejection

Signal-to-noise Ratio

Total Harmonic Distortion

Sensitivity

Audio Output

Output Connector

Power Supply

Dimensions

Net Weight

Accessories Included

UNIPAK ™ TRANSMITTER

RF Power Output

Spurious Emissions

Dynamic Range

Input Connections

Battery (not included)

Current Consumption

Battery Life

Dimensions

Net Weight (without battery)

Dimensions

Net Weight (without battery)

Accessory Included

High: 10 mW; Low: 2 mW, typical

According to National Regulations

≥90 dB, A-weighted

High impedance, low impedance, bias

9V (NEDA type 1604) alkaline

30 mA typical

Approximately 15 hours (High);

20 hours (Low), depending on battery type and use pattern

65.0 mm W x 110.0 mm H x 25.4 mm D

78 grams

Non-diversity, single-channel, dual antenna system

50 dB minimum

80 dB at 10 kHz deviation (IEC-weighted), maximum modulation 15 kHz

≤1% (10 kHz deviation at 1 kHz)

20 dBµV for 60 dB S/N (IEC-weighted)

350 mV (1 kHz modulation, 10 kHz deviation, 100k ohm load)

1 /

4

" TS (“mono”) phone jack

230V AC (50Hz) to 12V DC 500mA

(centre positive) external power supply.

190.0 mm W x 42.0 mmH x

130.0 mm D

311 grams

Power supply

HANDHELD TRANSMITTER

RF Power Output

Spurious Emissions

Dynamic Range

Microphone Element

Battery (not included)

Current Consumption

Battery Life

High: 10 mW; Low: 2 mW, typical

Under Federal Regulations

≥90 dB, A-weighted

Dynamic unidirectional

9V (NEDA type 1604) alkaline

30 mA typical

Approximately 15 hours (High);

20 hours (Low), depending on battery type and use pattern

241.3 mm long, 53.3 mm maximum diameter

360 grams

AT8456a Quiet-Flex ™ stand clamp

† In the interest of standards development, A.T.U.S. offers full details on its test methods to other industry professionals on request.

Optional System Accessories

WIRELESS ESSENTIALS ® MICROPHONES AND CABLES

All Wireless Essentials accessories are terminated for use with ATW-T201 and other UniPak ™ transmitters.

AT829cW Miniature cardioid condenser lavalier microphone.

Includes clothing clip and windscreen.

MT830cW Miniature omnidirectional condenser lavalier microphone. Includes clothing clip and windscreen.

MT830cW-TH “Theater” model, same as MT830cW except beige colour mic and cable.

AT831cW Miniature cardioid condenser lavalier microphone.

Includes clothing clip and windscreen.

AT889cW Headworn noise-canceling condenser microphone.

Includes windscreen and cable clip.

AT892cW MicroSet ® headworn omnidirectional condenser microphone.

Includes element covers, windscreens, moisture guard and clothing clip.

AT892cW-TH “Theater” model, same as AT892cW except beige colour mic, earset and cable.

AT898cW Subminiature cardioid condenser lavalier microphone.

Includes clothing clip base, viper clip base, magnet clip base, three single mic holders, two double mic holders and two windscreens.

AT899cW

AT899cW-TH “Theater” model, same as AT899cW except beige colour mic and cable. Includes AT899AK-TH accessory kit.

ATW350CW Cardioid condenser instrument microphone.

Includes AT8418 clip-on instrument mount.

ATM73cW

Subminiature omnidirectional condenser lavalier microphone.

Includes AT899AK accessory kit.

ATM75cW

Headworn cardioid condenser microphone.

Includes windscreen.

Headworn cardioid condenser microphone.

Includes windscreen.

PRO 8HEcW Headworn hypercardioid dynamic microphone.

Includes windscreen and cable clip.

U851cW

U857ALcW

AT8319

AT8317

Includes AT8418 clip-on instrument mount.

Surface-mount wide-range hemi-cardioid condenser microphone.

Gooseneck cardioid microphone. Mounts to 5 /

8

"-27 thread.

Includes AT8663 A-mount flange, AT8664 A-mount cable pass-through adapter, AT8153 two-stage windscreen

Hi-Z instrument/guitar cable with 1 /

4

" phone plug.

Connecting cable for UniPak transmitter with an XLRF-type input connector, for Lo-Z microphones with XLRM-type output terminations.

OTHER ACCESSORIES

AT8114 Foam windscreen for handheld transmitter.

AT8390 Premium instrument cable with 1 /

4

" to 1 /

4

" phone plugs.

Available in a variety of lengths.

AT8456a Quiet-Flex ™ microphone stand clamp for handheld transmitter, 5 /

8

"-27 threads.

AT8634

ATW-RMS1 Remote mute switch designed to be installed between a wireless microphone using an HRS-type connector and its associated body-pack wireless transmitter. Includes permanently attached 22" cable and belt clip.

ATW-RCS1

Rack-mount adapter kit mounts one ATW-R250 in a single

19" rack space.

Remote momentary-mute/cough switch designed to be installed between a wireless microphone using an HRS-type connector and its associated body-pack wireless transmitter.

Includes permanently attached 22" cable and belt clip.

™ pouch with belt clip to hold UniPak transmitter.

9

PRO 35xcW Cardioid condenser instrument microphone.

DISCLAIMER

Audio-Technica operates a policy of continuous development. Audio-Technica reserves the right to make changes and improvements to any of the products described in this document without prior notice.

Under no circumstances shall Audio-Technica be responsible for any loss of data or income or any special, incidental, consequential or indirect damages howsoever caused.

The contents of this document are provided “as is”. Except as required by applicable law, no warranties of any kind, either express or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose, are made in relation to the accuracy, reliability or contents of this document. Audio-Technica reserves the right to revise this document or withdraw it at any time without prior notice.

The availability of particular products may vary by country. Please check with the distributor for your territory. In some countries there may be restrictions in using this equipment. Please check with your local radio frequency authorities.

Two-Year Limited Warranty

Audio-Technica microphones and accessories purchased in the UK and EU / Europe are warranted for two years from date of purchase by

Audio-Technica Ltd. to be free of defects in materials and workmanship. In event of such defect, product will be repaired promptly without charge or, at our option, replaced with a new product of equal or superior value if delivered to A-T Ltd., prepaid, together with the proof of purchase.

Prior approval from A-T Ltd. is required for return. This warranty excludes defects due to normal wear, abuse, shipping damage, or failure to use product in accordance with instructions. This warranty is void in the event of unauthorized repair or modification.

For return approval and shipping information, contact the Service Department,

Audio-Technica Ltd. Tel: +44 (0)113 277 1441.

Outside the U.K, please contact your local dealer for warranty details.

Visit our website

www.audio-technica.com

Audio-Technica Ltd Technica House Royal London Industrial Estate Old Lane Leeds LS11 8AG England

Tel: +44 (0) 113 277 1441 Fax: +44 (0) 113 270 4836 Email: [email protected]

ER0019 -001 ©2007 Audio-Technica Ltd