Audio Technica 200 Series System information

200 Series Professional
VHF Wireless Systems
UniPak™ System
Guitar System
Headworn Microphone System
Lavalier Microphone System
Handheld Microphone System
Installation and Operation
Professional VHF Wireless Systems
Installation and Operation
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 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.
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-201 UniPak™ body-pack transmitter systems
include models pre-packaged with either an AT-GCW guitar
cable ( /G), a PRO 8HEcW headworn microphone ( /H) or an
AT829cW lavalier mic ( /L) for particular applications. All A-T
Wireless Essentials™ microphones and cables, available separately, are pre-terminated for use with any ATW-201 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-R200 receiver design features a novel “docking”
power supply configuration (patent pending). An AC power
adapter housed in a compartment in the receiver uses an
IEC-standard detachable power cordset. Furthering its flexibility,
the power adapter may be easily removed from the receiver
case, permitting its use as a conventional in-line AC adapter.
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.
See pages 8-9 for illustrations.
Receiver Installation
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.
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-of-sight to the transmitter’s likely operating position.
Power Connection
Turn the receiver’s volume control all the way down. If not
already connected, plug the small DC output cord from the AC
power adapter to the DC power input jack on the back of
receiver. Plug the power cordset into the power adapter, and
then connect the cordset to an AC source.
(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 cordset
from the AC outlet whenever the system is not in use – both
for safety, and to conserve energy.)
If desired, the power adapter may be removed from the receiver housing and used as an in-line supply. To remove the
adapter, gently pull the release tab slightly away from the
housing; then pull the power supply straight back out of the
receiver (Fig. A). Extend the 12V DC cord and/or the AC cordset as desired.
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
4. AF PEAK INDICATOR: Only lights when audio distortion
is present at maximum modulation. Not affected by
position of Volume control.
5. VOLUME CONTROL: Adjusts the audio level at the 1/4"
output jack. Does not affect AF Peak indicator.
Rear Panel Controls and Functions (Fig. D)
6. AC POWER ADAPTER: Power supply “docks” inside
receiver housing, but can be removed to be used as an
in-line supply if desired.
7. RELEASE TAB: Pull down slightly to permit removal of
power adapter from receiver housing.
8. AC INPUT: Connect the AC cordset here.
9. DC POWER CORD: Connects the power supply’s 12-volt
DC output to the receiver’s DC input jack.
10. DC POWER INPUT: Connect the provided docking
power adapter, or other 12V DC source. (Receiver requires
200 mA.)
11. SQUELCH CONTROL: Adjusts level of noise-muting circuit
(preset at factory but can be adjusted as circumstances
12. 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.
Transmitter Setup
Battery Selection and Installation
An alkaline 9-volt battery is recommended. Make certain the
transmitter power switch is Off before installing or changing
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 E.
2. Carefully insert a fresh 9V alkaline battery, observing polarity
3. Replace the battery cover (Fig. F).
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. G). Do not attempt to pull the lower body farther
down, or to gain access to the electronics.
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 7).
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.
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. I/J) 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. E/G). 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.)
See pages 8-9 for illustrations.
System Operation
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 cordset 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.
• 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.
• Guitar/Instrument: 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.
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.
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.
Receiver Squelch
The squelch control on the rear panel of the receiver is preset
at the factory, but can be adjusted if you must use the system
in a high RF interference area. If there is audio output from the
receiver when your transmitter is off, adjust the squelch control
so the system will receive the signal from your transmitter but
“squelch” or eliminate the unwanted background RF noise.
This adjustment can cause a reduction in useable range of the
wireless transmitter, so set the control to the lowest position
which reliably mutes the unwanted RF signals.
Adjusting Input Level - Handheld Transmitter
Unscrew the lower body cover and slide it downward, exposing
the screwdriver and Gain Trimmer control (Fig. H). 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
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. E). Gently turn both
the “MT” (Mic Trimmer) and “GT” (Guitar Trimmer) controls to
their full counterclockwise positions (toward “LO”).
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
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.
System Operating Frequencies
Frequency Selection
Each transmitter/receiver system operates on a single factoryaligned, crystal-controlled frequency. Available frequencies are
shown in the chart below.
RF Interference
If you encounter receiving interference (from other than an
operating TV station), often it can be eliminated by adjusting the
receiver’s squelch control, as described on page 5.
Operating frequency is specified by a two character code,
such as “T2,” in addition to the actual frequency in MHz. 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.
Please note that wireless frequencies are shared with other
radio services. According to Federal Communications
Commission 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
Freq. Code
Freq. (MHz)
• Traveling frequencies:
(Normally work anywhere in the U.S.A. and
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
Freq. Code
Model ATW-R200
Serial Number
Model ATW-T20
Serial Number
Operating Frequency
Frequency Stability
Modulation Mode
Maximum Deviation
Operating Range
Operating Temperature Range
Frequency Response
Receiving System
Image Rejection
Signal-to-noise Ratio
Total Harmonic Distortion
Audio Output
Output Connector
Power Supply
Net Weight
Accessories Included
VHF high band, 169 MHz to 172 MHz
±15 kHz
200' minimum
40° F (4° C) to 110° F (43° C)
80 Hz to 13 kHz
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)
/4" TS (“mono”) phone jack
120V AC 60 Hz, 6 VA; or 12V DC, 200 mA,
center positive, with external DC supply
8.27" (210.0 mm) W x 1.72" (43.5 mm) H
x 4.73" (120.0 mm) D
18.9 oz (536 grams); without AC adapter,
11.9 oz (336 grams)
AD1202A 120V docking AC adapter;
120V AC IEC cordset
RF Power Output
Spurious Emissions
Dynamic Range
Input Connections
Current Consumption
Battery Life
Net Weight (without battery)
RF Power Output
Spurious Emissions
Dynamic Range
Microphone Element
Current Consumption
Battery Life
Net Weight (without battery)
Accessory Included
10 mW High position, 2 mW Low position,
Under federal regulations
≥90 dB, A-weighted
High impedance, low impedance, bias
9V (NEDA type 1604) alkaline,
not included
30 mA typical
Approximately 15 hours in High position
Approximately 20 hours in Low position
2.56" (65.0 mm) W x 4.33" (110.0 mm) H
x 1.00" (25.4 mm) D
2.8 oz (78 grams)
10 mW High position, 2 mW Low position,
Under federal regulations
≥90 dB, A-weighted
Dynamic unidirectional
9V (NEDA type 1604) alkaline,
not included
30 mA typical
Approximately 15 hours in High position
Approximately 20 hours in Low position
9.50" (241.3 mm) long, 2.10" (53.3 mm)
12.7 oz (360 grams)
AT8456a 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
All Wireless Essentials accessories are terminated for use with ATW-T201
and other UniPak™ transmitters.
Miniature cardioid condenser lavalier microphone.
Includes clothing clip and windscreen. Provided with
ATW-201/L systems.
Subminiature omnidirectional condenser lavalier
microphone. Includes clothing clip and windscreen.
MT830cW-TH “Theater” model, same as MT830cW except beige color
mic and cable for concealment.
Miniature cardioid condenser lavalier microphone.
Includes clothing clip and windscreen.
Surface-mount wide-range hemi-cardioid condenser
AT857AMLcW 19" gooseneck cardioid microphone.
Mounts to 5/8"-27 thread. Includes windscreen.
PRO 35xcW
Hi-Z instrument/guitar cable with 1/4" phone plug. Provided
with ATW-201/G systems.
Connecting cable for UniPak transmitter with an XLRF-type
input connector, for Lo-Z microphones with XLRM-type
output terminations.
Foam windscreen for handheld transmitter.
Water-resistant pouch for UniPak transmitter.
Shielded audio cable with 1/4" to 1/4" phone plugs.
Available in a variety of lengths.
(Also available with one straight and one 90° phone plug
as the AT8316.)
Stand clamp for handheld transmitter, 5/8"-27 threads.
Vinyl pouch with belt clip to hold UniPak transmitter.
Headworn noise-canceling condenser microphone.
Includes windscreen and cable clip.
Cardioid condenser instrument microphone.
Includes AT8418 clip-on instrument mount.
Headworn cardioid condenser microphone.
Includes windscreen.
Headworn cardioid condenser microphone.
Includes windscreen.
Headworn hypercardioid dynamic microphone.
Includes windscreen and cable clip. Provided with
ATW-201/H systems.
Cardioid condenser instrument microphone.
Includes AT8418 clip-on instrument mount.
Receiver Power Supply
Release Tab
Figure A (p. 3)
Figure B (p. 3)
Receiver Controls and Functions
Figure C (p. 3)
Figure D (p. 3)
Transmitter Controls and Functions
Trimmer (MT)
Guitar Trimmer
(under screwdriver clip)
Battery-Save Switch
Battery Polarity
Figure E (p. 4)
Figure F (p. 4)
Battery Polarity
Figure G (p. 4)
Gain Trimmer
Figure H (p. 5)
Battery Condition
Power Switch
Battery Condition
Power Switch
Figure I (p. 4)
Figure J (p. 4)
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 our
option, 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 the
sales 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 or
modification, 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; any
warranty 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.
Visit our Web Site!
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224 330/686-2600
P51503 ©2002 Audio-Technica U.S., Inc. Printed in U.S.A.