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1400 Series Professional

UHF Wireless SystemsATW-1451 UniPak Transmitter System

ATW-1452 Handheld Dynamic Microphone System

Installation and Operation

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Individuals with implanted cardiac pacemakers orAICD devices: Please see notice on back cover.

Location

For best operation the receiver should be at least 3 ft. abovethe ground and at least 3 ft. away from a wall or metal surfaceto minimize reflections. The transmitter should also be at least3 ft. away from the receiver, as shown in Figure A.

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

Output Connections

There are two audio outputs on the back of the receiver:balanced (160 mV) and unbalanced (280 mV). Use shielded

audio cable for the connection between the receiver and themixer. If the input of the mixer is a 1/4" jack, connect a cablefrom the 1/4" unbalanced audio output on the back of the receiv-er to the mixer. If the input of the mixer is an XLR-type input,

Thank you for choosing an Audio-Technica professional wirelesssystem. You have joined thousands of other satisfied customerswho have chosen our products because of their quality, perfor-mance and reliability. This Audio-Technica wireless microphone

Professional UHF Wireless Systems

Installation and Operation

Receiver Installation

Introduction

Fig. A Receiver Location

CAUTION! Electrical shock can result from removal ofthe receiver cover. Refer servicing to qualified servicepersonnel. No user-serviceable parts inside. Do notexpose to rain or moisture.

The circuits inside the receiver and transmitter have beenprecisely adjusted for optimum performance and compli-

ance with federal regulations. Do not attempt to open thereceiver or transmitter. To do so will void the warranty,and may cause improper operation.

This device complies with part 15 of the FCC Rules.Operation is subject to the condition that this device doesnot cause harmful interference.

This device complies with INDUSTRY CANADA R.S.S.210,en conformit avec IC: RSS-210/CNR210. Operationis subject to the following conditions: 1) This device maynot cause harmful interference and 2) this device must

accept any interference received, including interferencewhich may cause undesired operation.

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POWER

MIN MAX

AF LEVEL

Front Panel Controls and Functions (Fig. B)

1 TUNER A ANTENNA JACK: Antenna connector for

Rear Panel Controls and Functions (Fig. C)

9 SQUELCH CONTROL Adj t l l f i ti i it

Receiver Controls and Functions

Fig. B Receiver Front Panel

Fig. C Receiver Rear Panel

AF OUTBALANCED

AF OUTUNBALANCED

SQUELCH ADJ.

GROUND LIFT

GROUND

DC 12V~18V500 mA

218

9

10

11

3

6 8

UHF

DIVERSITY

RECEIVER AF LEVEL

80 92 106 126 140 dB SPL

1 2 3 4 5 A B

RF LEVEL TUNER

4 7

5

12

13

ANT. A ANT. B

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Handheld Transmitter Battery Installation

1. While holding the upper part of the transmitter body justbelow the ball-screen, unscrew the lower body cover andslide it downward to expose the battery compartment.

2 Lift the white battery keeper arm and insert a 9V battery

Battery Selection

An alkaline 9-volt battery is recommended.

UniPak Transmitter Battery Installation

1. Slide off the battery cover as shown in Figure D.2. Carefully insert a fresh 9-volt alkaline battery, observing

correct polarity as marked inside the battery compartment.The transmitter housing is designed to prevent incorrectinstallation of the battery. Do not force the battery in.

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

Battery Condition Indicator

The red battery condition indicator (Fig. H/I) should light stronglywith a fresh battery. As the battery weakens, the indicator willgrow dimmer. When the indicator becomes very dim or goes

out, there is little life left in the battery. Replace it at once forcontinued operation of the transmitter.

Battery-Save Switch

All transmitters feature battery-save switches (Fig. D/F). Assupplied, the switch is set in the H (high) position for maxi-mum range. Switching to the L (low) position increases batterylife by reducing power. (Note: Effective range decreases whenthe switch is set at the L position.)

UniPak Transmitter Input Connection

Connect an audio input device (microphone or guitar cable)to the audio input connector on the bottom of the transmitter.A number of Audio-Technica professional microphones andcables are available separately, pre-terminated with a UniPakinput connector (see Optional System Accessories on

page 6.)Transmitting Antenna

The UniPak transmitter includes a permanently-attachedfle ible antenna For best res lts allo the antenna to hang

Transmitter Setup

Fig. H Fig. I

Fig. D

Fig. E

TRANSMITTER

UniPak

BATT.

ON OFF

ST.BYINPUT POWER BATT. ANT

OFF ONST

Battery PolarityDiagram

Battery-Save Switch(under screwdriver clip)

Guitar Trimmer(GT)

MicrophoneTrimmer (MT)

Battery ConditionIndicator

Power SwitchOn/Standby/Off

Battery ConditionIndicator

Input

Connector

Power SwitchOff/Standby/On

Antenna

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Check the frequency of the system against the chart on page 7to ensure you have the proper frequency for your area.Operating frequency is shown on the back panel of thereceiver and on the transmitter.

Turn down the AF Level control of the receiver as well asthe mixer. Switch on the receiver only. Do notswitch on thetransmitter yet.

Receiver On . . .

The power indicator will light up.

Transmitter On . . .

The transmitters have a 3-position power switch. When theswitch is set to Standby, the transmitter produces RF with no

audio signal. When the switch is On, the transmitter producesboth RF and audio.

Receiver Squelch

The squelch control on the back of the receiver is preset at thefactory, but can be adjusted if you must use the system in anarea with considerable RF interference. If there is audio outputfrom the receiver when yourtransmitter is off, adjust thesquelch control so the system will receive the signal fromyourtransmitter but squelch or eliminate the unwantedbackground RF noise. This adjustment can cause a reduction in

useable range of the wireless transmitter, so set the control tothe lowestposition that reliably mutes the unwanted RF signals.

Input Level Adjustment

Input trimmer controls in the transmitters enable you to usemicrophones or guitars with different sensitivities, or to adjustfor different acoustic levels.

Adjusting Input Levels UniPak Transmitter

Slide the battery cover off the top part of transmitter andremove the screwdriver from its clip (Fig. D). Gently turn the

MT (mic trimmer) and GT (guitar trimmer) controls to theirfull counter-clockwise positions.

Microphone: Adjusting input level

While speaking/singing into the microphone at typically-loudlevels, carefully turn the MT control clockwise while watchingthe receiver's AF Level indicator. Increase the MT control set-ting until the maximum audio output of the mic lights aboutthree or four LED units on the receiver's AF Level indicator.Do not set the level too high (indicated by the red LEDlighting). At normal audio levels, only the first two or perhapsthree LEDs should light. (When using a guitar, return the MTcontrol setting to minimum.)

Guitar/Instrument: Adjusting input level

While playing at typically-loud levels, carefully turn the GTcontrol clockwise while watching the receiver's AF Level indi-cator. Increase the GT control setting until the maximumaudio output lights about three or four LED units on thereceiver's AF Level indicator. Do not set the level too high(indicated by the red LED lighting). At normal audio levels,only the first two or perhaps three LEDs should light. (Whenusing a microphone, return the GT control setting tominimum.)

After adjusting input levels, return the screwdriver to its clipand reinstall the battery cover. No further transmitter gainadjustments should be needed, as long as the input deviceand the acoustic input level are not changed.

Adjusting Input Level Handheld Transmitter

Unscrew the lower body cover and slide it downward, exposingthe screwdriver and gain trimmer (Fig. G). Remove the screw-driver and gentlyturn the gain trimmer control to its fullcounter-clockwise position.

While speaking/singing into the microphone at typically-loudlevels, carefully turn the trimmer control clockwise whilewatching the receivers AF Level indicator. Increase the controlsetting until the maximum audio output of the mic lights

about three or four LED units on the receiver's AF Level indi-cator. Do not set the level too high (indicated by the red LEDlighting). At normal audio levels, only the first two or perhapsthree LEDs should light

System Operation

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Optional System Accessories

MICROPHONES AND CABLES

Specifications

OVERALL SYSTEM

Operating Frequency UHF band, 732 MHz to 746 MHz

Frequency Stability 0.005%

Modulation Mode FM

Maximum Deviation 15 kHzOperating Range 200' minimum

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

Frequency Response 100 Hz to 15 kHz

RECEIVER

Receiving System Dual independent receivers, automatic-switching diversity reception

Image Rejection 45 dB minimum

Signal- to-noise Ratio 95 dB at 10 kHz deviation (IEC-weighted),maximum modulation 15 kHz

Total Harmonic Distortion 1% (10 kHz deviation at 1 kHz)

Sensitivity 20 V for 60 dB S/N (IEC-weighted)

Audio OutputUnbalanced 280 mV (at 1 kHz, 10 kHz deviation,

10k ohm load)

Balanced 160 mV (at 1 kHz, 10 kHz deviation,10k ohm load)

Output ConnectorsUnbalanced 1/4" phone jackBalanced XLRM-type

Power Supply 12-18V DC, 500 mA

Dimensions 8.27" (210.0 mm) W x 1.93" (49.0 mm) Hx 9.88" (251.0 mm) D

Weight 2.9 lbs (1.3 kgs)

Accessories Included Two antennas, rack mount adapters,AD1205A AC adapter

UNIPAK TRANSMITTER

RF Power Output 50 mW Max

Spurious Emissions Under federal regulations

Dynamic Range 90 dB

Input Connections High impedance, low impedance, biasBattery 9V (NEDA type 1604) alkaline, not included

Current Consumption 50 mA typical

Battery Life Approximately 8 hours in High positionApproximately 10 hours in Low position

Dimensions 2.56" (65.0 mm) W x 4.33" (110.0 mm) Hx 1.00" (25.4 mm) D

Net Weight (without battery) 3.2 oz (90 grams)

HANDHELD TRANSMITTER

RF Power Output 50 mW MaxSpurious Emissions Under federal regulations

Dynamic Range 90 dB

Microphone Element Dynamic unidirectional

Battery 9V (NEDA type 1604) alkaline, not included

Current Consumption 50 mA typical

Battery Life Approximately 8 hours in High positionApproximately 10 hours in Low position

Dimensions 9.53" (242.0 mm) long, 2.13" (54.0 mm)diameter

Net Weight (without battery) 12.3 oz (350 grams)

Accessory Included AT8431 stand clamp

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

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UHF TV Band (732-746 MHz) Freq. Code Freq. (MHz)

For use only where there is no TV Channel 57: 57R 732.65057V 733.000

For use only where there is no TV Channel 58: 58F 735.60058G 735.95058K 736.65058L 737.000

For use only where there is no TV Channel 59: 59K 742.70059Q 744.10059R 744.85059S 745.200

System Operating Frequencies

Aside from the TV channel restrictions above, multi-channel systems may combine up to all 10 frequencies. Due to the uniqueconditions encountered in any complex system, the following guidelines may be helpful:

Use the Low-power transmitter setting to reduce the possibility of interference.

Maintain the maximum possible spacing between transmitters and receivers, and between transmitters. 1400 Series operating frequencies have been selected for optimum compatibility. However, othersources of RF energy can

affect the overall performance of the multi-mic system in ways which cannot be predicted. Only on-site trials with allRFequipment in operation can determine the overall system functionality

Frequency SelectionEach transmitter/receiver system operates on a single factory-aligned, crystal-controlled frequency. Available frequencies areshown in the chart below.

Because the 732-746 MHz frequencies are shared with TVbroadcasting, frequency selection is partially dependent uponwhich TV broadcast channels are in operation where the wire-less system is to be used.

Operating frequency is specified by a three-character code,such as 57V, in addition to the actual frequency in MHz.The frequency of each transmitter appears on a label on theoutside of the unit. The frequency of each receiver appears ona label on the back of the unit and the frequency of each sys-tem appears on the outer carton. For future reference, please

record them in the space provided below.

Wireless Operating Frequencies

RF InterferenceIf you encounter receiving interference (from other than anoperating TV station), often it can be eliminated by adjustingthe receivers squelch control, as described on page 5.

Please note that wireless frequencies are shared with otherradio services. According to Federal CommunicationsCommission regulations,Wireless microphone operations areunprotected from interference from other licensed operationswithin the band. If any interference is received by anyGovernment or non-Government operation, the wirelessmicrophone 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.

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One-Year Limited Warranty

Audio-Technica professional wireless systems purchased in the U.S.A. are warranted for one year from date of purchase by Audio-Technica U.S., Inc.(A.T.U.S.) to be free of defects in materials and workmanship. In event of such defect, product will be repaired promptly without charge or, at ouroption, replaced with a new product of equal or superior value if delivered to A.T.U.S. or an Authorized Service Center, prepaid, together with thesales slip or other proof of purchase date. Prior approval from A.T.U.S. is required for return. This warranty excludes defects due to normal wear,abuse, shipping damage, or failure to use product in accordance with the instructions. This warranty is void in the event of unauthorized repair ormodification, or removal or defacing of the product labeling.

For return approval and shipping information, contact the Service Dept., Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224.

Except to the extent precluded by applicable state law, A.T.U.S. will have no liability for any consequential, incidental, or special damages; anywarranty of merchantability or fitness for particular purpose expires when this warranty expires.

This warranty gives you specific legal rights, and you may have other rights which vary from state to state.

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

Notice to individuals with implanted cardiac pacemakers or AICD devices:

Any source of RF (radio frequency) energy mayinterfere with normal functioning of the implanted device. All wire-

less 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.

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