Audio Technica ATW-3110A Owner's manual

3000 Series Professional
UHF Wireless Systems
ATW-3110a UniPak™Transmitter System
ATW-3141a Handheld Dynamic Microphone System
ATW-3171a Handheld Condenser Microphone System
Installation and Operation

Professional UHF Wireless Systems
Installation and Operation
2
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 compli-
ance with federal regulations. Do not attempt to open the
receiver 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 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.
For simplicity, model numbers used throughout the manual will
reference only the basic model number without the “C” or “D”
band indications.
Each wireless system includes a receiver and either a body-
pack or handheld transmitter. Individual components are also
available separately.
All 3000 Series components feature soft-touch controls for
quick, easy access to a formidable range of functions; an LCD
information display in each unit provides convenient visual
indication of unit settings and operation.
The ATW-R3100 receiver is equipped with automatic frequency
scanning for easy setup. It also features true diversity
reception. Two antennas feed two completely independent RF
sections on the same frequency; automatic logic circuitry
continuously compares and selects the superior received signal,
providing better sound quality and reducing the possibility of
interference and dropouts. Soft-touch controls provide
convenient access to a variety of functions, while an LCD
information display provides constant monitoring of system
operation, including indication of the transmitter’s battery
status. The receiver is half-width for a standard 1U 19" rack
mount; rack-mount adapters are included. Two receivers can be
mounted side by side, using an optional AT8630 joining-plate kit.
The versatile ATW-T310 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. In addition to its programmable
functions, the transmitter features a three-position sliding cover
to limit access, if desired, to just the Power/Mute button, or to
cover all the controls, as appropriate for the application and user.
The ATW-T341 handheld dynamic microphone/transmitter
features the same element used in the Artist Elite®AE4100
dynamic handheld microphone created for professional live-
sound venues.
The ATW-T371 handheld condenser microphone/transmitter
features the same element used in the Artist Series ATM710
cardioid condenser vocal microphone.
Transmitters in the 3000 Series use two 1.5V AA batteries for
economical operation and wide availability. The receiver and
both transmitters have “fuel gauge” battery condition indicators
with low-battery warnings.
An advanced Digital Tone Lock™ tone squelch system in the
ATW-R3100 receiver opens only when a 3000 Series transmitter
is detected, reducing the possibility of interference. As a result,
3000 Series transmitters and receivers must be used together
and should not be used with components from other
Audio-Technica wireless systems, or with those of other
manufacturers.
Please note that in multiple-system applications there must be a
transmitter-receiver combination set to a separate frequency for
each input desired (only one transmitter for each receiver).
Because the wireless frequencies are within UHF TV frequency
bands, only certain operating frequencies may be useable in
a particular geographic area. System operating frequencies will
be found on page 13.
Introduction
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, especial-
ly 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, perfor-
mance and reliability. This Audio-Technica wireless microphone
system is the successful result of years of design and manufac-
turing experience.
3000 Series systems and components operate on 200 PLL-
synthesized frequencies in one or two 25 MHz-wide UHF
frequency ranges:
• Band C 541.500–566.375 MHz (TV Channels 25–30)
• Band D 655.500–680.375 MHz (TV Channels 44–49)

Receiver Installation
3
Location
For best operation the receiver should be at least 3 ft. (1 m)
above the ground and at least 3 ft. away from a wall or metal
surface to minimize reflections. The transmitter should be at
least 3 ft. from the receiver, as shown in Figure A. Keep
antennas away from noise sources such as digital equipment,
motors, automobiles and neon lights, as well as away from
large metal objects.
Output Connections
There are two audio outputs on the back panel: balanced
(32 mV) and unbalanced (50 mV). Use shielded audio cable for
the connection between the receiver and the mixer. If the
input of the mixer is a 1/4" jack, connect a cable from the 1/4"
unbalanced audio output on the back of the receiver housing
to the mixer. If the input of the mixer is an XLR-type input,
connect a cable from the balanced XLR-type audio output on
the back panel to the mixer. The two isolated audio outputs
permit simultaneous feeds to both unbalanced and balanced
inputs. For example, both a guitar amp and a mixer can be
driven by the receiver.
Antennas
Attach the included pair of UHF antennas to the antenna input
jacks. The antennas are normally positioned in the shape of a
“V” (both 45° from vertical) for best reception.
Antennas can be remotely located from the receiver. However,
due to signal loss in cables at UHF frequencies, use the
lowest-loss RF cables practical for any cable runs over 25 feet.
RG8-type is a good choice. Use only copper-shielded cable,
not CATV-type foil-shielded wire. Audio-Technica offers quality
RF cables in four lengths, as well as remote antennas; see the
Optional System Accessories section on page 12.
Power Connections
Connect the included AC adapter to the DC power input on the
back of the receiver. Loop the small cord from the DC plug over
the cord hook above the jack, to keep the plug from being
detached by an accidental tug on the cord. Then plug the AC
adapter into an AC power outlet. Operation of the receiver is
controlled by the front-panel Power switch.
See pages 18-19 for illustrations.
Figure A

4
Power On/Off
To turn the receiver on, press in the Power switch. The Alert
light and the LCD window will come on (about 1-2 seconds).
The operating frequency will be displayed in the window after
the power-up sequence. To turn the receiver off, press the
Power switch again.
LCD Window
The LCD (Liquid Crystal Display) presents a great deal of setup
and operating information clearly and conveniently. (See Figure
D for examples.)
Up/Down Arrow Buttons
In conjunction with the Mode/Set button, the arrow buttons
permit moving through the menu of functions, and choice of
settings within each function.
Mode/Set Button
The Mode/Set button shifts the receiver from normal operation
into Menu mode and, in conjunction with the Up/Down arrow
buttons, permits selection of different features and changing of
their stored values in the Edit mode.
How to Make Setting Changes
1. From the normal operating mode, press the Mode/Set
button once to enter the Function Menu mode. (Only the
frequency will remain in the LCD window, and the
receiver’s audio output will be cut off.)
2. Use the Up/Down arrow buttons to reach the desired
function. The value in the LCD window is the current
setting for that function.
3. Press the Mode/Set button once again to open the list of
available choices for that function. The value will flash,
indicating that it can be changed (Edit mode).
4. Use the arrow buttons to go through the available choices,
stopping on the desired new choice.
5. (a) To accept and enter the new choice, press and hold the
Mode/Set button until “STORED” appears in the LCD. This
changes the value and puts the function of the buttons
back at Menu level (step 2 above). (The “B” tuner light
will come on while the Mode/Set button is depressed, to
confirm its action.)
(b) To “back out” of the Edit mode without making a new
choice, simply press the Mode/Set button once. The word
“ESCAPE” will appear in the window and the function of
the buttons will revert to the Menu level (step 2 above),
without making any changes.
6. Repeat this selection process for any other function
changes desired. When finished with any changes, use
the arrow buttons to move to “QUIT”. Press the Mode/Set
button once to exit the menu and return the receiver to
normal operation. (“RF” and “AF” will reappear in the
window, indicating the return to normal receiver operation,
with the receiver’s audio output again enabled.)
How to Restore Default Settings
To return all the receiver functions to their original factory-
default settings, first turn the receiver off. Then hold in the
Mode/Set button while pressing the Power switch. The LCD
will briefly show “RESET”, followed by “WAIT” (release the
Mode/Set button), before commencing normal-mode operation
at the default settings.
Front Panel Controls and Functions (Fig. B)
1. POWER SWITCH: Press Power switch in and the receiver
readouts will light.
2. ALERT INDICATOR: The Alert Indicator lights:
(a) When the receiver is in the Function Edit mode,
(b) When no RF signal is received from transmitter,
(c) When only one or two RF signal-strength bars are on,
(d) When the transmitter is in the Mute mode,
(e) When audio modulation level from the transmitter is
close to the clipping point (AF +3/+6 bars),
(f) When only one bar of the Battery “fuel gauge” is on
(transmitter battery is weak).
3. LCD WINDOW: Liquid Crystal Display indicates control
settings and operational readings. See Figure D on page 18
for examples.
4. TUNER OPERATION INDICATOR: Indicates which Tuner
(A or B) has the better reception and is in operation. The
“B” indicator also lights to serve as confirmation of
Mode/Set button entries.
5. UP/DOWN BUTTONS: Press Up or Down arrow buttons, in
conjunction with the Mode/Set button, to step through
menus, select operating frequency and edit receiver
function choices.
6. MODE/SET BUTTON: Use in conjunction with the
Up/Down arrow buttons to step through menus, choose
operating frequency, initiate automatic scanning and select
receiver function options.
7. MOUNTING ADAPTERS: For mounting the receiver in any
standard 19" rack. Attach adapters to the receiver with the
screws supplied and remove the four receiver feet. (Use
optional AT8630 joining-plate kit to mount two ATW-R3100
receivers side-by-side.)
Rear Panel Controls and Functions (Fig. C)
8. ANTENNA INPUT JACK: BNC-type antenna connector for
Tuner “B.” Attach the antenna directly, or extend it with a
low-loss antenna cable. See the “Antennas” section on
page 3 for more details.
9. ANTENNA INPUT JACK: Input for Tuner “A.” Attach the
antenna directly, or extend it with a low-loss antenna cable.
10. AF LEVEL CONTROL: Adjusts audio output level of both AF
Output jacks; maximum output is fully clockwise.
11. GROUND LIFT SWITCH: Disconnects the ground pin of the
balanced output jack (12) from ground. Normally, the switch
should be to the left (ground connected). If hum caused by
a ground loop occurs, slide switch to the right (ground
lifted).
12. BALANCED AUDIO OUTPUT JACK: XLRM-type connector.
A standard 2-conductor shielded cable can be used to
connect the receiver output to a balanced microphone-level
input on a mixer or integrated amplifier.
13. UNBALANCED AUDIO OUTPUT JACK: 1/4" phone jack. Can
be connected to an unbalanced aux-level input of a mixer,
guitar amp or tape recorder.
14. POWER INPUT JACK: Connect the DC plug from the
included in-line AC adapter.
15. CORD HOOK: Loop the small DC cord around the cord
hook to keep the DC plug from pulling out accidentally.
Receiver Controls and Functions

5
When the receiver is in the Menu or Edit mode, its audio
output is silenced. Once control-setting operations are
completed (or Escape is used), normal receiver operation
will resume with its audio output restored.
While in the Edit mode, if no action is taken for approxi-
mately 30 seconds (no buttons pressed), the receiver will
“back out” to the Menu mode. Similarly, after about 30
seconds of inaction in the Menu mode, the receiver will
“back out” to normal receiver operation with audio output
restored.
Receiver Functions
Function Menu Default Setting* Choices (Edit) ▲▼ Wrap-around**
(Receiver powers-up at Frequency)
▲▼ Frequency Lowest in band†200 discrete frequencies Yes
▲▼ High-pass Filter HP OFF HP OFF HP –6 HP –12 HP –18 No
▲▼ Meter Hold MH OFF MH OFF MH ON Yes
▲▼ Squelch SQ 15 dB SQ 15 dB to SQ 39 dB in 6 dB steps No
▲ Scan 1 Lowest in frequency group All frequencies in Scan 1 group No
▲ Scan 2 Lowest in frequency group All frequencies in Scan 2 group No
▲ Scan 3 Lowest in frequency group All frequencies in Scan 3 group No
▲▼ Quit (exit Menu) QUIT Press Mode/Set to exit --
*To reset to Default values, hold in the Mode/Set button while pressing the Power button to turn on the unit.
** Continue in the same Up/Down direction and choices “wrap around” to the other end of the range.
† Band C: 541.500 – 566.375 MHz; Band D: 655.500 – 680.375 MHz.
Table 1. Receiver Functions
Receiver Controls and Functions (Continued)
High-pass Filter
Internal high-pass filter circuitry may be set to four positions:
High-pass Off, or a 6 dB, 12 dB or 18 dB slope at 150 Hz. The
default setting is Off (“HP OFF”). Increasing the slope of the
high-pass filter further suppresses unwanted low frequencies,
while maintaining the frequency response in the desired audio
range.
Meter Hold Setting
When activated (“MH ON”), this function permits the
bar-meters in the LCD window to capture and display the
highest-level “AF” audio modulation (a solid bar) and the
lowest-level "RF" signal (a flashing bar) received from the
transmitter. This is particularly useful when setting up the
system initially, during a sound-check, or when diagnosing
operating problems. The default setting is Off (“MH OFF”).
When the Meter Hold is On, it is possible to reset it – to obtain
a new set of RF and AF readings – without turning it off-and-on
using the Menu/Edit functions. Simply press the transmitter’s
Power/Mute button once (to mute the transmitter) and wait
until the receiver’s Alert light comes on, indicating the Mute
condition. Then press the transmitter’s Power/Mute button once
again, to un-mute the transmitter. After the Alert light goes
out, a new set of min/max RF/AF readings will be indicated on
the bar-meters. (Note that, depending upon the digital updating-
and-confirming sequence of the Mute condition data from the
transmitter, it may take several seconds for the Alert light
condition to change. The Meter Hold function is not reset
until the Alert light has turned on, then turned off.)
Digital Tone Lock™Squelch
The 3000 Series employs a unique Digital Tone Lock squelch
system that provides enhanced rejection of interference. In
addition to providing highly effective control of unwanted noise,
the Tone Lock signal from the transmitter also conveys data on
the transmitter’s battery condition and mute status back to the
receiver for display.
The squelch level is adjustable from 15 dB (the default value) to
39 dB in 6 dB steps. Increasing the squelch level – also called
“tightening the squelch” – can cause a reduction in useable
range of the wireless transmitter, so use the lowest value that
reliably mutes the unwanted RF signals. (If interference is a
problem, first consider trying a different frequency.)
See pages 18-19 for illustrations.

6
PWR.LOC Power is locked On as of the time “PWR.LOC”
is applied. The Mute functioning is unaffected.
Note: When in the PWR.LOC mode, the
transmitter may be turned off by: (1) Re-accessing
the .LOC Menu and changing the setting, or
(2) Removing and re-installing the batteries. When
the transmitter is turned on again, it will power-up
in the NO.LOC mode. (Only the PWR. LOC
function will change when batteries are removed;
all other settings remain stored in memory.)
If an attempt is made to take an action that currently is locked
out, the LCD will display “LOC.KED” briefly, then return to its
previously-displayed contents.
Audio Input Selector
The UniPak™ body-pack transmitter provides input connections
for both low-impedance (Lo-Z) microphones and high-impedance
(Hi-Z) instruments. A wide range of Audio-Technica Wireless
Essentials™ microphones and cables is available pre-terminated
with the appropriate professional latching connector. (See page 12.)
Selection of the desired input – microphone or instrument – is
made through the function menu. Depending upon the input
selected, a small “MIC” or “INST” will show in the LCD
window, just below the frequency. (In the handheld transmitter,
only “MIC” will show in the LCD window.)
Setting Audio Input Level for transmitters
ATW-T310 and ATW-T341 transmitter
A 4-position audio input gain setting, selected through the
function menu, serves to match the audio input level to the
transmitter for best modulation with minimum distortion.
Choices are +12 dB, +6 dB, 0 dB and -6 dB. (Default value:
+6 dB.) Select the highest setting that does not result in over-
modulation with the highest audio/instrument input levels (an AF
indication on the receiver no higher than “0”).
ATW-T371 transmitter
A 3-position audio input gain setting, selected through the
function menu, serves to match the audio input level to the
transmitter. Choices are +12 dB, +6 dB, and 0 dB. (Default
value: +6 dB.) In addition, a mechanical pad switch on the
condenser capsule (inside the screw-on wire mesh grille) can
provide another 6 dB of attenuation. For best performance,
adjust the input level using the function menu choices, keeping
the capsule's mechanical switch at 0 dB. If more audio
attenuation is needed, set the capsule's pad switch to -6 dB.
Restore Default Settings
A “PRESET” selection in the menu permits resetting of all
transmitter functions to their factory-default values.
1. Press the Set button once to move to Menu mode.
2. Press the Up arrow twice to move to “PRESET” in the
LCD window.
3. Press the Set button once and “LOAD” will appear in the
LCD.
4. Press and hold the Set button until “DEF” appears in the
LCD.
5. Press and hold the Set button until “LOADED” appears
briefly in the LCD. The window will then revert to
“PRESET”.
6. Press the Down arrow once to move to “QUIT”.
7. Press the Set button once to exit the Menu mode and
return to normal operation, with all factory-default settings
restored.
Refer to Figures E, F, G and H on pages 18 and 19 for an
overview of transmitter features and controls.
LCD Window
The Liquid Crystal Display presents a great deal of setup and
operating information clearly and conveniently (See examples
in Fig. J). The LCD in the transmitters is designed for greatest
contrast and best viewing with the window rotated somewhat
away from the viewer (about 30 degrees), not straight-on, for
a more convenient holding/viewing position.
Power/Mute Button
The transmitters have a combination Power and Mute switch.
When used in combination with the programmed choices
explained below, the various functions available to the
transmitter user may be tailored to fit personal preferences
or particular situations of use.
Power On/Off
To turn the transmitter on, press and hold the Power/Mute
button until the red power indicator and the LCD window come
on (about 1-2 seconds). The operating frequency will show in
the window after the power-up sequence.
To turn the transmitter off, press and hold the Power/Mute
button again, until the red power indicator and the LCD window
are extinguished (about 1-2 seconds). The LCD window will
show “PWR.OFF” before shutdown.
Mute Off/On
When the transmitter is muted, it produces RF with no audio
signal modulation. When the transmitter is un-muted, it
produces both RF and audio.
To mute the transmitter (cut off the audio, but continue the RF
output), press and release the Power/Mute button once. A
small “MUTE” will appear in the LCD window, just below the
frequency (Fig. J-2).
To un-mute the transmitter (restore the audio), press and
release the Power/Mute button once again. The “MUTE” will
disappear from the LCD window.
Power/Mute Locks
Programmable Power/Mute Locks limit the functioning of the
Power/Mute button as desired for particular users and/or
applications. Power can be locked On; Mute can be locked Off.
Selection of the desired locks, if any, is made through the
function menu:
Setting Description
NO.LOC The normal Power and Mute functions are fully
operational.
ALL.LOC Both the Power and Mute functions are locked
into their status as of the time “ALL.LOC” is
applied. (Power On, and Mute either On or Off.)
Note: ALL.LOC must be re-accessed and the
setting changed to turn the transmitter off.
MUT.LOC In this mode, the audio cannot be muted. The
Power functioning is unaffected. (If MUT.LOC is
applied while the transmitter is muted, pressing
the Power/Mute button once will return to
un-muted operation; thereafter the Mute function
is disabled until the setting is changed again.)
Transmitter Controls And Functions

UniPak Transmitter Functions
Function Menu Default Setting Choices (Edit) ▲▼ Wrap-around*
(Transmitter powers-up at Frequency)
▲▼ Frequency Lowest in band†200 discrete frequencies Yes
▲▼ RF Power RF LOW RF LOW RF HI Yes
▲▼ Audio Input Level +6 dB –6 dB 0 dB +6 dB +12 dB No
▲▼ Power/Mute Locks NO.LOC NO.LOC ALL.LOC MUT.LOC PWR.LOC Yes
▲▼ Input Select MIC MIC INSTR Yes
▲▼ Reset to Defaults PRESET LOAD (b) hold until: DEF (c) hold until: LOADED --
▲▼ Quit (exit Menu) QUIT Press Set to exit --
* Continue in the same Up/Down direction and choices “wrap around” to the other end of the range.
† Band C: 541.500 MHz; Band D: 655.500 MHz.
Table 2. UniPak Transmitter Functions
Transmitter Controls And Functions (Continued)
Handheld Transmitter Functions
Function Menu Default Setting Choices (Edit) ▲▼ Wrap-around*
(Transmitter powers-up at Frequency)
▲▼ Frequency Lowest in band†200 discrete frequencies Yes
▲▼ RF Power RF LOW RF LOW RF HI Yes
▲▼ Audio Input Level
Dynamic +6 dB -6 dB 0 dB +6 dB +12 dB No
Condenser** +6 dB 0 dB +6 dB +12 dB No
▲▼ Power/Mute Locks NO.LOC NO.LOC ALL.LOC MUT.LOC PWR.LOC Yes
▲▼ Reset to Defaults PRESET LOAD (b) hold until: DEF (c) hold until: LOADED --
▲▼ Quit (exit Menu) QUIT Press Set to exit --
* Continue in the same Up/Down direction and choices “wrap around” to the other end of the range.
** Additional 6 dB pad switch on capsule.
†Band C: 541.500 MHz; Band D: 655.500 MHz.
Table 3. Handheld Transmitter Functions
7
See pages 18-19 for illustrations.

Transmitter Setup
Battery Selection and Installation
Each transmitter uses two 1.5V AA batteries, not included.
Alkaline type is recommended. Always replace both batteries.
Make certain the transmitter power is Off before replacing
batteries.
UniPak™ Transmitter Battery Installation
1. Open the battery compartment door by sliding the catch
down (Fig. K). (If no batteries are inside, the door will not
spring open by itself.)
2. Observe correct polarity as marked on the metal
contacts on the door and carefully insert two fresh
1.5V AA alkaline batteries (Fig. L).
3. Close the door, making certain the latch clicks securely in
place.
Handheld Transmitter Battery Installation
1. While holding the lower body cover (near the LCD window),
grasp the upper part of the transmitter body just below the
grille and unscrew it at least four complete turns (Fig. G);
then slide the lower body cover down until it stops (Fig. H).
Once the cover has been lowered, turn the transmitter
over to reveal the battery compartment on the side
opposite the LCD window.
2. Observe correct polarity as marked inside the battery
compartment and carefully insert two fresh 1.5V AA
alkaline batteries (Fig. M). Insert the first battery and slide
it down. Then insert the second battery, bottom first, into
the space remaining. Make certain the batteries are fully
seated in the battery compartment.
3. Slide the lower body cover back up the body, then screw
the housing together. Do not overtighten.
Note: Remove batteries from the handheld transmitter starting
at the bottom (– end) of the top battery (Fig. M). The top
(+ end) of the top battery is captured in a recess and will not
come straight out.
Battery Condition Indicator
After the batteries are installed, turn the power on by pressing
and holding the Power/Mute button. The small red power-on
LED (Fig. E/F) should light and the LCD window should come
on. If this does not happen, the batteries are installed incorrectly
or they are dead. The transmitter’s “fuel gauge” battery
indicator displays a maximum of four bar segments. When it
flashes “LOW.BAT”, the batteries should be replaced immedi-
ately to ensure continued operation. (The receiver also displays
transmitter battery condition in the LCD window with bar
segments; the Alert indicator comes on to warn of a low-battery
condition.)
UniPak Transmitter Input Connection
Connect an audio input device (microphone or guitar cable) to
the audio input jack on the bottom of the transmitter. A number
of Audio-Technica professional microphones and cables are
available separately, pre-terminated with a UniPak input connec-
tor (see “Optional System Accessories” on page 12). The cable
connector latches automatically when inserted into the transmit-
ter jack. To unlatch and remove the connector, simply pull up on
the connector’s knurled metal collar.
UniPak Transmitter Antenna
The UniPak transmitter includes a field-replaceable 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 or using remote receiver antennas. Since the
transmitter antenna simply screws in, check it occasionally to
make certain it is snugly attached (finger-tight). Do not change
the length of the transmitting antenna.
Handheld Transmitter Antenna
The antenna for the handheld mic/transmitter is in the black,
non-metallic section at the bottom of the unit (Fig. F). For best
results, hold the mic/transmitter naturally, around its painted
metal case; holding or otherwise covering the antenna housing
may affect operating range.
UniPak Transmitter Mounting Clip
The UniPak transmitter’s mounting clip may be installed with
the case positioned either “up” or “down,” depending upon
which is preferred for the application. To turn the clip around,
spring the ends of the clip out of the two holes on the sides of
the transmitter case (Fig. E) and reinstall it facing in the opposite
direction.
8

System Operation
Switch on the receiver. Do not switch on the transmitter yet.
Selecting/Setting Frequency
Selection of the desired operating frequency is made through
the function menus. It’s usually best to start by setting the
receiver’s frequency, to determine there is no local interference
on that frequency. Then, always make certain to set the trans-
mitter to the receiver’s exact frequency. The receiver’s unique
Digital Tone Lock system squelches the audio only, permitting
any RF energy on the frequency to show on the “RF”
bar-meter.
Note: It’s often convenient to start with the factory-default
frequency, if there is no TV station on Channel 25 (for Band C
systems) or Channel 44 (for Band D systems).
Receiver On…
The Alert indicator and the LCD window will light up; the
normal-operation LCD display will appear after 1-2 seconds (Fig.
D-1). If any of the bars show in the “RF” bar-graph meter, there
may be RF interference in the area. If this occurs, select another
frequency as explained below. (If the Meter Hold function has
been selected, one of the RF bars will be flashing, indicating
the lowest RF level received.)
Using the Automatic Scan Function to Set Receiver
Frequency Automatically
1. Press the Mode/Set button once; then the “RF” and “AF”
scales will disappear from the window and only the
frequency will appear in the LCD window. (The receiver is
now in the Menu mode.) See Figure D-2.
2. Use the Up arrow button to reach Scan 1, Scan 2, or
Scan 3. Press the Mode/Set button once to select one of
these three Scan groups. The lowest frequency in the
selected Scan group will appear in the LCD window.
3. Press the Up arrow button to begin the scan. The word
“SCAN1”, “SCAN2” or “SCAN3” will flash in the LCD
window, depending on which Scan group you selected in
step 2.
4. The first available frequency will flash in the LCD window.
To activate this frequency selection, press and hold the
Mode/Set button until the word “STORED” appears in the
LCD window. (If you do not wish to complete this particular
selection, just press the Mode/Set button once. The word
“ESCAPE” will appear briefly in the window and the
receiver will return to the Menu mode.)
5. After you have activated your frequency selection (step 4),
the “RF” and “AF” scales will reappear in the window,
indicating the return to normal operation.
6. If you are using multiple systems, after completing the first
receiver's scan and frequency selection, set the transmitter
to the same frequency (see Setting Transmitter Frequency
instructions on page 10); leave the transmitter On, and run
the next receiver’s automatic scan function. Always set a
receiver-transmitter pair to the same frequency before
using the automatic scan function to select a frequency for
the next receiver. “End” will show on the receiver display
when no further usable frequencies remain in the selected
scan plan.
NOTES ON USING THE RECEIVER SCAN FEATURE:
•Selecting low power can be helpful for multiple system
setup if you are experiencing problems with radio frequency
interference.
• To prevent raised noise floors that a receiver scan might
interpret as radio frequency interference: during setup, keep
all transmitters at least three feet apart and at least
15 feet from the receivers.
Setting Receiver Frequency Manually
1. Press the Mode/Set button once; then only the frequency
will appear in the LCD window. (The receiver is now in the
Menu mode.) See Figure D-2.
2. Press the Mode/Set button again; the Alert light will come
on and the frequency in the window will flash. (The receiver
is now in the Edit mode, Fig. D-3.)
3. Use the Up/Down arrow buttons to change the frequency.
Press either arrow for single steps, or hold down either
arrow for rapid cycling through the band. Frequencies
“wrap around” to the other end of the range when the top
or bottom of the band is reached. Choose a frequency
appropriate for your area, avoiding frequencies with active
TV channels. (See the frequency listings on page 13.)
4. To activate this frequency selection, press and hold the
Mode/Set button until the word “STORED” appears in the
receiver’s window. (If you do not wish to complete this
particular selection, just press the Mode/Set button once.
The word “ESCAPE” will appear briefly in the window and
the receiver will return to the Menu mode.)
5. When finished entering a frequency, press the Down arrow
button once to move to “QUIT”. Then press the Mode/Set
button once to exit the menu. The “RF” and “AF” scales
will reappear in the window, indicating the return to normal
operation.
9
See pages 18-19 for illustrations.

10
System Operation (Continued)
Transmitter On…
Turn on the transmitter by pressing and holding the
Power/Mute button (Fig. E/F) for a second or two, until the red
power indicator and the LCD window have come on.
Setting Transmitter Frequency
1. Press the Set button once and the small word “MENU”
will appear above the frequency. Press the Set button
again and the small flashing word “EDIT” will appear to
the right of “MENU”. See Figures J-3 and J-4.
2. Use the Up/Down arrow buttons to change the transmitter
frequency. Press either arrow for single steps, or hold
down either arrow for rapid cycling through the range.
Frequencies “wrap around” when the top or bottom of the
band is reached. Select the exact frequency displayed on
the receiver.
3. To activate this frequency selection, press and hold the
Set button until the word “STORED” appears in the
transmitter’s window. (If you do not wish to complete this
selection, just press the Set button once: the word
“ESCAPE” will appear briefly in the window and the
transmitter will return to the Menu mode.)
4. When finished entering a frequency, press the Up arrow
button once to move to “QUIT”. Then press the Set
button once to exit the menu. The word “MENU” in the
transmitter window will go off, indicating the return to
normal operation.
When the transmitter is switched on and in normal operation,
the receiver’s “RF” signal-level bars will display from bottom to
top, with more bars indicating increased signal reception. For
optimum performance at least four, and preferably five or more,
of the RF indicators should be displayed.
Setting Levels
Correct adjustment of transmitter audio input, receiver audio
output, and mixer/amplifier input and output levels is important
for optimum system performance.
Set Transmitter Audio Input Level
ATW-T310 and ATW-T341 transmitters
A 4-position audio input gain setting, selected through the
function menu, serves to match the audio input level to the
transmitter for best modulation with minimum distortion.
Available choices are +12 dB, +6 dB, 0 dB and –6 dB. The
default value is +6 dB. Select the highest setting that does not
result in over-modulation with the highest audio/instrument input
levels (an AF indication on the receiver no higher than “0”).
ATW-T371 transmitter
A 3-position audio input gain setting, selected through the
function menu, serves to match the audio input level to the
transmitter for best modulation with minimum distortion.
Available choices are +12 dB, +6 dB, and 0 dB. The default
value is +6 dB. In addition, a mechanical pad switch on the
condenser capsule (inside the screw-on wire mesh grille) can
provide another 6 dB of attenuation. For best performance,
adjust the input level using the function menu choices, keeping
the capsule's mechanical switch at 0 dB. If more audio
attenuation is needed than the menu provides, then set the
capsule's pad switch to –6 dB.
RF Power Adjustment
RF power may be set to “RF HI” (30 mW nominal) or “RF
LOW” (10 mW nominal) through the function menu. The default
setting is “RF LOW”. While the High setting normally provides
maximum operating range, the Low setting will help extend
battery life. The Low setting may also be preferred in multi-
channel systems, or when operating very close to the receiver,
to reduce the possibility of interference or overload.
RF Interference
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 in
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 Audio-Technica professional
division. Extensive wireless information also is available on the
Audio-Technica Web site at www.audio-technica.com.

See pages 18-19 for illustrations.
Specifications†
OVERALL SYSTEM
UHF Operating Frequency
Band C: 541.500 to 566.375 MHz
Band D: 655.500 to 680.375 MHz
Number of Channels 200 total per band
Frequency Stability ±0.005%, Phase Lock Loop frequency
control
Modulation Mode FM
Normal Deviation ±10 kHz
Operating Range 300' typical
Operating Temperature Range 41° F (5° C) to 113° F (45° C)
Frequency Response 70 Hz to 15 kHz
ATW-R3100 RECEIVER
Receiving System Dual independent receivers, automatic-
switching diversity
Image Rejection 60 dB nominal, 55 dB minimum
Signal-to-noise Ratio 110 dB at 35 kHz deviation
(IEC-weighted), maximum modulation
75 kHz
Total Harmonic Distortion ≤1% (10 kHz deviation at 1 kHz)
Sensitivity 24 dBµV (S/N 60 dB at 5 kHz deviation,
IEC-weighted)
Intermediate Frequency 243.950 MHz, 10.7 MHz
Audio Output
Unbalanced: 50 mV (at 1 kHz, ±5 kHz deviation,
10k ohm load)
Balanced: 32 mV (at 1 kHz, ±5 kHz deviation,
10k ohm load)
Output Connectors
Unbalanced: 1/4" TS (“mono”) phone jack
Balanced: XLRM-type
Power Supply 120V AC 60 Hz, or 12-18V DC, 500 mA,
center positive, with external supply
Dimensions 8.27" (210.0 mm) W x 1.93" (49.0 mm) H
x 7.20" (183.0 mm) D
Weight 2.4 lbs (1.1 kg)
Accessories Included AC adapter; two flexible UHF antennas;
rack-mount adapters
ATW-T310 UNIPAK™TRANSMITTER
RF Power Output High: 30 mW; Low: 10 mW, nominal
Spurious Emissions Under federal regulations
Dynamic Range ≥110 dB, A-weighted
Input Connections High impedance, low impedance, bias
Antenna Tip Color
Band C: Blue
Band D: Green
Batteries (not included) Two 1.5V AA alkaline
Current Consumption High: 200 mA; Low: 150 mA, typical
Battery Life Approximately 6 hours (High); 8 hours
(Low), depending on battery type and
use pattern
Dimensions 2.60" (66.0 mm) W x 3.43" (87.0 mm) H
x 0.94" (24.0 mm) D
Net Weight (without batteries) 2.8 oz (80 grams)
HANDHELD TRANSMITTERS
RF Power Output High: 30 mW; Low: 10 mW, nominal
Spurious Emissions Under federal regulations
Dynamic Range
ATW-T341 ≥110 dB, A-weighted
ATW-T371 ≥108 dB, A-weighted
Microphone Element
ATW-T341 Dynamic cardioid (unidirectional)
ATW-T371 Condenser cardioid (unidirectional)
Batteries (not included) Two 1.5V AA alkaline
Current Consumption High: 230 mA; Low: 180 mA, typical
Battery Life Approximately 6 hours (High); 8 hours
(Low), depending on battery type and
use pattern
Dimensions
ATW-T341 9.33" (237.0 mm) long,
1.89" (48.0 mm) diameter
ATW-T371 9.38" (238.3 mm) long,
2.11" (53.6 mm) diameter
Net Weight (without batteries)
ATW-T341 9.9 oz (280 grams)
ATW-T371 8.0 oz (227 grams)
Accessory Included 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.
Specifications are subject to change without notice.
11

Optional System Accessories
WIRELESS ESSENTIALS™ MICROPHONES AND CABLES
All Wireless Essentials accessories are terminated for use with ATW-T310
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 color
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-CO Same as AT892cW except cocoa-color mic, earset and
cable.
AT892cW-TH “Theater” model, same as AT892cW except beige color
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 Subminiature omnidirectional condenser lavalier microphone.
Includes AT899AK accessory kit.
AT899cW-TH “Theater” model, same as AT899cW except beige color mic
and cable. Includes AT899AK-TH accessory kit.
ATM35cW Cardioid condenser instrument microphone.
Includes AT8418 clip-on instrument mount.
ATM73cW Headworn cardioid condenser microphone.
Includes windscreen.
ATM75cW Headworn cardioid condenser microphone.
Includes windscreen.
PRO 8HEcW Headworn hypercardioid dynamic microphone.
Includes windscreen and cable clip.
PRO 35xcW Cardioid condenser instrument microphone.
Includes AT8418 clip-on instrument mount.
U851cW Surface-mount wide-range hemi-cardioid condenser
microphone.
U857ALcW 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
AT-GCW Hi-Z instrument/guitar cable with 1/4" phone plug.
XLRW Connecting cable for UniPak transmitter with an XLRF-type
input connector, for Lo-Z microphones with XLRM-type
output terminations.
RECEIVER ACCESSORIES
AEW-DA550C UHF (540–565 MHz) active unity-gain antenna distribution
system provides two “1-in, 4-out” RF channels; connects a
pair of antennas to as many as four diversity receivers;
cascade output provided as a directional coupler. AC pass-
through allows daisy-chain AC hookup. Defeatable antenna
power. Metal receiver chassis with reinforced mounting ears
and rear rack mount capability. Includes detachable IEC
power cable, IEC pass-through cable, ten RF cables, front-
mount antenna cables and connectors, four DC power
cables to power up to four 3000 Series receivers. Mounts in
a single 19" rack space. For use with ATW-R3100C (Band C)
receivers.
AEW-DA660D Same as AEW-DA550C except for 655-680 MHz operation.
For use with ATW-R3100D (Band D) receivers.
AT8630 Joining-plate kit allows rack-mounting two ATW-R3100
receivers side-by-side in a single (1U) 19" rack space.
ATW-A20 Pair of UHF ground-plane antennas with 5/8"-27 thread for
mounting to microphone stands, etc. Takes RF cables with
BNC connectors, not included; see RF Cables below.
ATW-A49 Pair of UHF wide-band directional LPDA (log periodic dipole
array) antennas provide enhanced signal pickup for UHF
wireless systems throughout a wide band range
(440-900 MHz). Each antenna paddle is matched to 50 ohms
impedance with intergral high-quality low-loss BNC
connector; 6 dB gain. For permanent or temporary
installation; mounts to 5/8"-27 threads.
ATW-RA1 Rack-mount antenna kit brings antenna inputs to the front of
receiver for ease of setup, or when receiver is enclosed in a
metal rack. Includes a pair of extendible antennas. NOTE:
Two adapter kits are required when mounting two receivers
side-by-side in a single 19" rack space.
RF Cables Low-loss design, 50 ohm impedance, with BNC-to-BNC
connectors:
AC12 RG58-type cable (12')
AC25 RG8-type cable (25')
AC50 RG8-type cable (50')
AC100 RG8-type cable (100')
TRANSMITTER ACCESSORIES
AT8114 Foam windscreen for handheld transmitter.
AT8456a Quiet-Flex™stand clamp for handheld transmitter,
5/8"-27 threads.
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 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.
12

13
TV Ch. Band C: 541.500 - 566.375 MHz
25 --- --- --- --- 541.500 541.625 541.750 541.875
26 542.000 542.125 542.250 542.375 542.500 542.625 542.750 542.875
26 543.000 543.125 543.250 543.375 543.500 543.625 543.750 543.875
26 544.000 544.125 544.250 544.375 544.500 544.625 544.750 544.875
26 545.000 545.125 545.250 545.375 545.500 545.625 545.750 545.875
26 546.000 546.125 546.250 546.375 546.500 546.625 546.750 546.875
26 547.000 547.125 547.250 547.375 547.500 547.625 547.750 547.875
27 548.000 548.125 548.250 548.375 548.500 548.625 548.750 548.875
27 549.000 549.125 549.250 549.375 549.500 549.625 549.750 549.875
27 550.000 550.125 550.250 550.375 550.500 550.625 550.750 550.875
27 551.000 551.125 551.250 551.375 551.500 551.625 551.750 551.875
27 552.000 552.125 552.250 552.375 552.500 552.625 552.750 552.875
27 553.000 553.125 553.250 553.375 553.500 553.625 553.750 553.875
28 554.000 554.125 554.250 554.375 554.500 554.625 554.750 554.875
28 555.000 555.125 555.250 555.375 555.500 555.625 555.750 555.875
28 556.000 556.125 556.250 556.375 556.500 556.625 556.750 556.875
28 557.000 557.125 557.250 557.375 557.500 557.625 557.750 557.875
28 558.000 558.125 558.250 558.375 558.500 558.625 558.750 558.875
28 559.000 559.125 559.250 559.375 559.500 559.625 559.750 559.875
29 560.000 560.125 560.250 560.375 560.500 560.625 560.750 560.875
29 561.000 561.125 561.250 561.375 561.500 561.625 561.750 561.875
29 562.000 562.125 562.250 562.375 562.500 562.625 562.750 562.875
29 563.000 563.125 563.250 563.375 563.500 563.625 563.750 563.875
29 564.000 564.125 564.250 564.375 564.500 564.625 564.750 564.875
29 565.000 565.125 565.250 565.375 565.500 565.625 565.750 565.875
30 566.000 566.125 566.250 566.375 --- --- --- ---
3000 Series UHF Wireless Operating Frequencies
TV Ch. Band D: 655.500 - 680.375 MHz
44 --- --- --- --- 655.500 655.625 655.750 655.875
45 656.000 656.125 656.250 656.375 656.500 656.625 656.750 656.875
45 657.000 657.125 657.250 657.375 657.500 657.625 657.750 657.875
45 658.000 658.125 658.250 658.375 658.500 658.625 658.750 658.875
45 659.000 659.125 659.250 659.375 659.500 659.625 659.750 659.875
45 660.000 660.125 660.250 660.375 660.500 660.625 660.750 660.875
45 661.000 661.125 661.250 661.375 661.500 661.625 661.750 661.875
46 662.000 662.125 662.250 662.375 662.500 662.625 662.750 662.875
46 663.000 663.125 663.250 663.375 663.500 663.625 663.750 663.875
46 664.000 664.125 664.250 664.375 664.500 664.625 664.750 664.875
46 665.000 665.125 665.250 665.375 665.500 665.625 665.750 665.875
46 666.000 666.125 666.250 666.375 666.500 666.625 666.750 666.875
46 667.000 667.125 667.250 667.375 667.500 667.625 667.750 667.875
47 668.000 668.125 668.250 668.375 668.500 668.625 668.750 668.875
47 669.000 669.125 669.250 669.375 669.500 669.625 669.750 669.875
47 670.000 670.125 670.250 670.375 670.500 670.625 670.750 670.875
47 671.000 671.125 671.250 671.375 671.500 671.625 671.750 671.875
47 672.000 672.125 672.250 672.375 672.500 672.625 672.750 672.875
47 673.000 673.125 673.250 673.375 673.500 673.625 673.750 673.875
48 674.000 674.125 674.250 674.375 674.500 674.625 674.750 674.875
48 675.000 675.125 675.250 675.375 675.500 675.625 675.750 675.875
48 676.000 676.125 676.250 676.375 676.500 676.625 676.750 676.875
48 677.000 677.125 677.250 677.375 677.500 677.625 677.750 677.875
48 678.000 678.125 678.250 678.375 678.500 678.625 678.750 678.875
48 679.000 679.125 679.250 679.375 679.500 679.625 679.750 679.875
49 680.000 680.125 680.250 680.375 --- --- --- ---

14
3000 Series Frequency Scan Groups for Band C & Band D
Band C
Band C Scan Group 1 Band C Scan Group 2 Band C Scan Group 3
TV Ch. Frequency – MHz * TV Ch. Frequency – MHz * TV Ch. Frequency – MHz *
25 (None) 0 25 541.500 1 25 541.500 1
26 542.750 26 542.750 26 542.125
26 545.500 26 544.375 26 543.500
26 547.125 26 544.750 26 544.000
26 547.375 4 26 545.750 26 546.250 4
27 549.750 26 547.500 5 27 548.250
27 550.375 27 (None) 0 27 549.750 2
27 550.625 3 28 554.250 28 555.750
28 557.250 28 556.125 28 556.625
28 557.500 28 557.500 28 558.250
28 559.250 28 559.375 4 28 559.375 4
28 559.500 4 29 560.000 29 560.125
29 562.000 29 561.875 29 561.500
29 563.375 29 562.250 29 564.000
29 563.625 3 29 563.250 29 564.250 4
30 566.000 29 565.500 5 30 566.125 1
30 566.250 2 30 566.000 1
Band D
Band D Scan Group 1 Band D Scan Group 2 Band D Scan Group 3
TV Ch. Frequency – MHz * TV Ch. Frequency – MHz * TV Ch. Frequency – MHz *
44 655.500 1 44 655.875 1 44 655.500
45 658.000 45 656.250 44 655.750 2
45 658.375 45 658.500 45 656.625
45 659.250 45 659.750 45 658.500
45 659.500 45 660.000 45 658.750
45 661.500 5 45 660.500 5 45 659.500 4
46 662.375 46 664.375 46 662.750
46 662.750 2 46 665.500 2 46 665.250 2
47 669.625 47 671.625 47 671.250
47 671.750 247 672.000 2 47 672.375
48 674.750 48 674.000 47 673.125 3
48 675.750 48 674.500 48 674.125
48 676.125 48 675.750 48 674.500
48 678.000 48 676.750 48 675.375
48 678.250 48 678.250 5 48 678.625
48 679.500 6 49 680.250 1 48 679.125 5
49 (None) 0 49 (None) 0
* Number of wireless frequencies in TV Channel.

15
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 no closer than
three feet (1 m).
4. Avoid placing the receiver in a low or shielded location
where the transmitter and receiver antennas are not
visible to each other. If necessary, use remotely-located
receiver antennas.
5. Avoid placing the receiver near computers or other RF
generating equipment.
6. The receiver and transmitter must be set to the same
frequency.
7. A receiver cannot receive signals from two transmitters
at the same time.
8. Do not obstruct the handheld transmitter’s antenna
(located at the base) or attached body-pack transmitter’s
antenna with your hands.
9. You need to change frequencies 1) when a strong
interference signal is received, 2) when audio quality is
poor due to weak RF, or 3) during multiple-system
operation in order to select an interference-free
frequency.
10. Turn the transmitter off when not in use. Remove the
batteries if the transmitter is not to be used for a period
of time.
Ten Tips to Obtain the Best Results
For future reference, please record your system information here:
Receiver ATW-R3100___ S/N
C/D Serial Number appears on the FCC label on the back of the receiver.
Transmitter ATW-T310___ S/N
C/D Serial Number appears on the FCC label on the back of the transmitter.
ATW-T341___ S/N
C/D Serial Number appears in a recess in the battery compartment of the transmitter.
ATW-T371___ S/N
C/D Serial Number appears in a recess in the battery compartment of the transmitter.
The advent of "digital TV" has greatly increased the number of TV broadcast transmitters in operation and has added a new and
different type of TV signal to the airwaves.
Digital TV spreads its transmitted power fairly uniformly across an entire 6 MHz-wide TV channel, effectively “blocking” use of
any of the frequencies for wireless mic systems in the local area.
By comparison, the original type of television transmission, “analog TV,” concentrates the broadcast power within certain fairly
narrow frequency ranges within the 6 MHz-wide TV channel. As a result, wireless systems usually can still operate on
frequencies where the power is not concentrated, even through an analog TV station is transmitting. This ability for wireless
systems to “co-exist” with analog TV stations permits the use of many more frequencies than would seem to be available, just
based upon the number of “TV channels in use” locally.
And while “analog vs. digital” does add a new complexity to wireless frequency selection and system design, it remains the case
that your wireless needs can be achieved. Our website, www.audio-technica.com, offers a wide range of information about
multi-channel operation and frequency selection. In addition, A-T's resources are available to assist you in specifying, installing and
troubleshooting large wireless systems.
A word about "Digital TV"

16
Receiver is not on (LCD window does not light).
• Receiver Power switch is not pressed in.
• Small DC power cord from included in-line power supply
is not plugged into jack on back of receiver. (Use the cord
hook to secure it.)
• The in-line power supply is not plugged into AC power
outlet.
• AC power is not present at the AC outlet.
Receiver is on (LCD window lights)
•No sound •Alert light is OFF:
✓“RF”, “AF” and “BATT” legends do not appear in LCD…
• Receiver is in the Menu mode. [See p. 4.]
✓“RF” and "AF" level meters both show good signals.
• AF Level control on back of receiver not turned up
(clockwise). [See p. 4.]
Note: If the “AF” level meter shows a good signal on the
receiver when the transmitter is receiving audio input,
and the AF Level control is turned up, then the problem
is in connections to or control settings on the mixer,
amplifier, etc.
✓Only “RF” level meter shows good signal; no “AF”
signal.
• No sound input to mic.
• ATW-T310 body-pack only: Wrong input selected (“INST”
or “MIC”). [See p. 6.]
Receiver is on (LCD window lights)
•No sound •Alert light is ON:
✓“RF”, “AF” and “BATT” legends do not appear in LCD,
and LCD is flashing…
• Receiver is in the Edit mode. [See p. 4.]
✓“RF” and “AF” level meters both show good signals.
•The transmitter audio level is too high
(“+3”/”+6” on receiver). [See p. 9.]
•Batteries may be weak. (Check “BATT” fuel gauge.)
✓Only “RF” level meter shows good signal; no “AF”
signal.
• Transmitter may be muted. (Note: Normally it takes
several seconds for the Alert light to turn off/on after
the transmitter mute is switched off/on.) [See p. 5.]
✓Neither the “RF” nor the “AF” level meter shows any
signal.
• Receiver antennas not connected.
• Transmitter is turned off.
•Transmitter batteries are dead or missing.
• Transmitter is set to a different frequency.
• Transmitter and receiver not in same Band (C/D).
Troubleshooting Guide
Receiver is on (LCD window lights)
•Distorted sound •Alert light is ON:
✓“RF” and/or “AF” level meters may show good signals.
• The transmitter audio level is too high (“+3”/”+6” on
receiver). [See p. 9.]
• Received RF level may be too low (only one or two bars).
• Batteries may be weak; check “BATT” fuel gauge.
(Sound may or may not be distorted.)
Momentary loss of sound/noisy sound as transmitter is
moved around performing area.
• Transmitter and receiver antennas not in line-of-sight
(or perhaps too far apart). Adjust positions of units so
they are visible to each other/closer together; use
remote antennas located closer to the transmitter
location.
•Signal blockage or interference from large metal objects,
other wireless units located too close and/or on
incompatible frequencies, computer or lighting
equipment.
•Squelch setting may be set “tighter” than it needs to
be. (Recommended squelch setting is the
minimum/default value, 15 dB.) [See p. 5.]
Tip: Use the Meter Hold function to help identify and
resolve (or at least avoid) RF problem locations.
[See p. 5.]
With transmitter on, received signal is noisy or contains
extraneous sounds.
•Batteries may be weak. Check “BATT” fuel gauge and
“RF” meter level.
• Local TV transmissions on this frequency.
• Nearby sources of RF interference, such as computers,
lighting equipment, etc.
•Two transmitters may be operating on the same
frequency. Locate and turn one off or change its
frequency.
•In multiple-system use, two (or more) incompatible
frequencies may have been selected.

Troubleshooting’s First Line of Defense: Factory-Default Settings
Incorrect settings on the receiver and/or transmitter can make the wireless system’s operation seem poor, or even “dead.”
To eliminate the possibility that incorrect function settings are the source of problems, restore both the receiver and the
transmitter to their factory-default settings.
RECEIVER – To return all receiver functions to their original factory-default settings:
1. First, turn the receiver off.
2. Hold in the Mode/Set button while pressing the Power switch to turn the receiver back on. The LCD will briefly show
“RESET”, followed by “WAIT” (release the Mode/Set button), before commencing normal-mode operation with all
factory-default settings restored.
(3.) (If the default frequency is not useable in your area, set both the receiver and the transmitter to the same suitable
frequency.)
TRANSMITTER – To return all transmitter functions to their factory-default settings:
1. Press the Set button once to move to Menu mode.
2. Press the Up arrow twice to move to “PRESET” in the LCD window.
3. Press the Set button once and “LOAD” will appear in the LCD.
4. Press and hold the Set button until “DEF” appears in the LCD.
5. Press and hold the Set button until “LOADED” appears briefly in the LCD. The window will then revert to “PRESET”.
6. Press the Down arrow once to move to “QUIT”.
7. Press the Set button once to exit the Menu mode and return to normal operation, with all factory-default settings restored.
(8.) (If the default frequency is not useable in your area, set both the receiver and the transmitter to the same suitable
frequency.)
17
“Alert” Conditions
The red Alert indicator on the receiver signals the user regarding a number of operating conditions.
Transmitter conditions:
✓No RF When no RF signal is received from transmitter.
✓Weak RF When only one or two “RF” signal-strength bars are on.
✓Transmitter Muted When the transmitter is in the Mute* mode.
✓Transmitter Audio Too High When audio modulation level from the transmitter is close to the clipping point
(AF +3/+6 bars).
✓Batteries Weak When only one bar of the Battery* “fuel gauge” is on.
Receiver conditions:
✓Edit Mode When the receiver is in the Function Edit mode.
* These functions use digital data supplied from the transmitter. It can take up to several seconds for the receiver display to be
“updated” with the latest mute/unmute and battery status information. This is normal operation for both the Alert light and the
“BATT” indication.

Receiver Front Panel
POWER
MODE/SET
UHF SYNTHESIZED DIVERSITY RECEIVER ATW-R3100
ALERT
-TUNER-
A
B
ON
OFF
Figure B
Battery Door
Receiver Rear Panel
AF OUT
UNBALANCED
AF OUT
BALANCED
ANT. A
ANT. B
AF 
LEVEL
GROUND LIFT
12~18V
DC500 mA
GROUND
UniPak Transmitter
15
75
89
Figure C
Receiver LCD Window
BATTRF AF
MHz
8
7
6
5
4
3
2
1
+6
+3
0
-3
-6
-9
-16
-20
MHz
D-1. Normal Receiver Operation
(Transmitter off)
D-2. Menu Mode (Frequency)
D-3. Edit Mode (Frequency)
Figure D
LCD Window
Figure E
167
11 12 13 14
10
Antenna
Audio Input Jack
Mounting Clip
Set Button
Power/Mute
Button
Up/Down
Arrows
Sliding
Control Cover
(3-position)
Power-on LED
18
MHz
Flashing
234
Band C: Blue
Band D: Green

Handheld Transmitter Exterior
Figure G
Figure F
19
LCD
Window
Power-on
LED
Opening Handheld Transmitter
Handheld Transmitter Interior
Figure H
SET
LCD
Window
Power-on
LED
Power/Mute
Button
Antenna
Housing
UniPak Battery Door
Transmitter LCD Window
J-1. Normal Operation
* ATW-T310 only: “INST”
J-2. Operation with Mute On J-4. Edit Mode (Frequency)
Figure J
BATT MIC
B
Installing Handheld Transmitter Batteries
Figure M
Serial Number
Start from this end
to remove batteries
Figure K
Installing UniPak Transmitter Batteries
Figure L
J-3. Menu Mode (Frequency)
▼
Up/Down
Arrows
Set Button
BATT MUTE MIC
B
BATT MIC
MENU
BATT MIC
EDIT
Flashing
▼
*
▼
▼
▼

Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224 330/686-2600 www.audio-technica.com
P2323-03610 P51823 ©2006 Audio-Technica U.S., Inc. Printed in China
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.
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