Audio Technica T201, T202, R250 User Manual
ATW-251 UniPak™ System
ATW-251/G Guitar System
ATW-251/H Headworn Microphone System
ATW-251/L Lavalier Microphone System
ATW-252 Handheld Microphone System
200 Series Owners Manual v.1
7-6-06
Page 1 of 9
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: RSS-210/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.
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 d evice. 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 s hi rt 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.
:
200 Series Owners Manual v.1
7-6-06
Page 2 of 9
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-251 UniPak™ body-pack transmitter systems
include models pre-packaged with either an AT-GCW 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 ATW-251 system.
Because 200 Series packaging is designed to hold all versions of the system,
some compartments in the carton are intentionally left empty.
The ATW-R250 receiver includes a space-saving switching power supply that
automatically adapts to changes in mains voltage. Unlike bulky linear power
supplies, this switching power supply is lightweight and compact; it uses only a
single outlet space.
The versatile ATW-T201 UniPak body-pack transmitter has both a highimpedance input for instruments, and a low-impedance input with bias
connection for use with dynamic and electret condenser microphones. The ATWT202 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.
Receiver Installation
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"
200 Series Owners Manual v.1
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Page 3 of 9
phone plug to connect the receiver’s AF Out jack to the mixer/amplifier’s auxlevel 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 120 Volt 60 Hz AC power outlet.
(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.)
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.
B). 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-ofsight to the transmitter’s likely operating position.
Receiver Controls and Functions
Front Panel Controls and Functions (Fig. C)
1. ANTENNAS: Position the “signal” antenna (1a) and “ground” antenna (1b) as
shown in Figure B.
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. D)
5. VOLUME CONTROL: Adjusts the audio level at the 1/4" output jack. Does not
affect AF Peak indicator.
6. DC POWER INPUT: Connect the provided docking power adapter, or other
12V DC source. (Receiver requires 200 mA.)
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