Audio Technica ATW-1821 Manual instruction

w i r e l e s s
w i r e l e s s
w i r e l e s s
w i r e l e s s
w i r e l e s s
1800 Series
Camera-mount UHF Wireless
Microphone Systems (dual-channel)
ATW- 1821 UniPak®Body-pack Transmitter System
ATW-
1822 Plug-on Transmitter System
ATW-
1823 Plug-on and Body-pack Transmitter System
Set-up 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 IN USTRY CANA A 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. Changes or modifications not expressly approved by Audio-Technica could
void your authority to operate this equipment.
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.
CAUTI N! The circuits inside the receiver and transmitter have been precisely adjusted for optimum performance and compliance with federal
regulations. o not attempt to open the receiver or transmitter. To do so will void the warranty, and may cause improper operation.
Warning: To prevent fire or shock hazard, do not expose this appliance to rain or moisture.
Attention: Pour prévenir feu ou choc électrique, ne pas exposé l'appareil à la pluie ou à l'humidité.
About 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 help with operation or frequency selection, please contact your local dealer or Audio-Technica. Extensive wireless information
also is available at www.audio-technica.com.
Contents
Components and System Configurations 3
System Features 4
Quick verview of System peration 5
Receiver Controls 6
perating the Receiver 8
Transmitter Controls 11
perating the Transmitter 12
Tips for Best Results 14
Specifications 15
2

1800 Series Components (dual-channel)
Receiver and Included Components/Accessories
AT W - 18 23
Camera-mount UHF Wireless
Microphone System (dual-channel)
with Body-pack and Plug-on Transmitters
ATW-R1820
ual-channel receiver
Two detachable
antennas
Two 18" output cables,
TA3F to XLRM
Pouch with belt clip
(holds receiver)
Transmitters
AT W - T 1 8 01
UniPak®transmitter with included omnidirectional lavalier microphone
ATW-T1802
Plug-on transmitter
AT W - 18 21
Camera-mount UHF Wireless
Microphone System (dual-channel)
with Body-pack Transmitters
AT W - 18 22
Camera-mount UHF Wireless
Microphone System (dual-channel)
with Plug-on Transmitters
System Configurations
3
Note: All model numbers have an additional letter at the end to indicate frequency band.

System Features (dual-channel)
• Two completely independent receiver channels in a single unit, for simultaneous
operation of two microphones
• True Diversity operation for resistance to multi-path interference and dropouts
• UHF reception with 996 frequencies selectable in 25 kHz steps
• Automatic frequency scanning for easy selection of open channels
• Tone Lock™ squelch system eliminates interference when transmitter is off
• Two independent balanced outputs
• Headphone monitor output with independent level control
• Battery fuel-level indicators on transmitters and receiver
• Soft-touch controls for easy frequency selection
• LCD frequency and battery status display with backlight on receiver and transmitters
• Antenna and AF Peak LED indicators
• Dual-channel receiver can operate in single-receiver mode to extend battery life
when only one audio channel is required
• Compact dual receiver is easy to mount on a camera
• Transmitters operate in low or high transmission modes to conserve
battery life/maximize power
• Easy, user-friendly operation
• Clear, natural sound quality
• Powered by AA batteries or by external 12V DC power (not included)
• System components of the 1800 Series and 3000 Series UHF wireless systems
can be used interchangeably
4

Quick verview of System peration
Thank you for purchasing this Audio-Technica 1800 Series Dual-channel Camera-mount
UHF Wireless Microphone System. All 1800 Series systems are designed primarily to be used
with video cameras, with the AT W-R1820 dual-channel receiver mounted on a camera and
connected to the camera's audio input; the systems may also be used with other components
equipped with microphone-level input(s).
This system is equipped with a dual receiver, which consists of two completely independent
receiver channels in a single unit, for simultaneous operation of two microphones.
First, insert batteries (see Battery Installation, page 8 ). Note: The AT W-R1820 dual-channel
receiver also functions without batteries if connected to an external power supply
(12V DC source, 500 mA nominal current, not included).
Next, attach the antennas to the antenna input jacks, and mount the AT W-R1820 dual-channel
receiver to your camera (mounting hardware not included); or use the included pouch with belt
clip to attach the AT W-R1820 to your belt. Connect the output cable(s) to the AT W-R1820 and
your video camera (and/or audio mixer). (See Output A, Output B, and Output Sele t Swit h,
page 7.)
Turn the AT W-R1820 Power Switch on. Choose “1” to activate only Receiver Channel 1 and
Output A (Power/Peak LE 1 should light red); this option will increase useable battery life.
Choose “Both” to activate both receiver channels and both outputs (Power/Peak LE s 1 and 2
should light red). (See Power Swit h with four positions: External, Off, 1, Both, page 6.)
Select a frequency for Receiver Channel 1 and Receiver Channel 2. (See Sele ting Frequen ies
on your Re eiver, page 8.)
N TE: Receiver Channel 1 and Receiver Channel 2 must be set to different frequencies to
avoid interference. Transmitter-Receiver pairs must be set to identical frequencies: set
Transmitter 1 to the same frequency as Receiver Channel 1; setTransmitter 2 to the same
frequency as Receiver Channel 2.
If your system is equipped with a UniPak®Body-pack Transmitter and lavalier microphone:
Plug the included lavalier microphone(s) into the UniPak®body-pack transmitter(s) and position
microphone(s) on your subject about six inches below the chin. Anticipate movements that may
cause the microphone to rub against or be covered by clothing, and position the microphone to
avoid it. Turn the power on, select a frequency and choose other settings. (See Operating the
Transmitter, page 12.)
If your system is equipped with a Plug-on Transmitter:
Attach a microphone (dynamic or condenser) to the plug-on transmitter’s input connector
(see Mi rophone Input, page 11). The transmitter provides power to condenser microphones
rated to operate on 12V phantom power or less. Turn the power on, select a frequency and
choose other settings. (See Operating the Transmitter, page 12.)
5

AT W-R1820 Dual-channel Receiver Controls (front panel)
Liquid Crystal isplay shows battery status and frequency settings. (Use the ual-channel
Control Switch (6) to select frequencies for Receiver Channel 1 and Receiver Channel 2;
in Hold position, only Receiver Channel 1 frequency appears in LC .) Battery meter is only
active when ual-channel Control Switch is in the Hold position.
BNC-type antenna connectors. Antennas A & B (split internally) both provide signals for
Receiver Channel 1 and Receiver Channel 2. Attach the antennas to the antenna input jacks.
Make certain that during operation there is a clear open-air path between the receiver antennas
and the transmitters.
True iversity operation: two antennas feed two completely independent RF sections on the
same frequency for each receiver; automatic logic circuitry selects the superior signal.
iversity Indicator 1 indicates which tuner has the better reception and is in operation for
Receiver Channel 1; iversity Indicator 2 indicates which tuner has the better reception and is
in operation for Receiver Channel 2.
Turns the unit on and off.
Choose “Ext”, if the unit is connected to an external power supply (12V C source, 500 mA
nominal current, not included). In “Ext” position, both receiver channels and both outputs are
activated (indicated by illumination of Power/Peak LE s 1 and 2).
Choose “Off” to turn the unit off.
Choose “1” to activate only a single receiver channel (Receiver Channel 1/Output A, indicated by the
illumination of Power/Peak LE 1). This conserves energy if you are only using one audio channel.
Choose “Both” to activate both receiver channels and both outputs (indicated by illumination of
Power/Peak LE s 1 and 2).
Note: Selected receiver will be muted unless Dual-channel Control Switch (6) is in Hold position.
Indicates which receiver channel(s) is (are) in operation. Also indicates receiver overload by
turning off; too much signal will cause blinking LE (off during peaks). To correct overload,
adjust audio gain on transmitter. (See Audio Input Level (Gain) Adjustments, page 13.)
This switch allows you to use the single LC window to control each of the two receiver
channels separately.
To set frequency for Receiver Channel 1, switch to 1 (left position).
To set frequency for Receiver Channel 2, switch to 2 (right position).
To lock settings and operate unit, switch to Hold (center position).
Note: Receiver Channel 1 is muted when switch is at 1; Receiver Channel 2 is muted
when switch is at 2; both channels un-mute when switch is at Hold.
This LE is red when switch is in position 1, indicating muted operation for Receiver Channel 1.
It is also red when switch is in position 2, indicating muted operation for Receiver Channel 2.
LE turns green in Hold position, indicating unit is ready for operation.
Use with the ual-channel Control Switch and Up/ own arrows to choose operating frequencies
manually or automatically (using your choice of three automatic scan groups).
Press Up or own arrows, in conjunction with the Set button, to choose operating frequencies
manually or automatically (using your choice of three automatic scan groups).
LCD
Antenna Input Jacks
Diversity Indicators
for each antenna
for each receiver
ower Switch
with four positions:
External, Off, 1, Both
ower/ eak LED
Dual-channel Control Switch
with three positions: 1, Hold, 2
Dual-channel Control LED
Set
Up/Down Arrows
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Output A
Output B
Output Select Switch
Receiver Level Controls (1 and 2)
Monitor Select Switch
Monitor Level Control
DC Input
Monitor Output
(rear panel)
Balanced Audio Output Jack: TA3M-type connector. Pin 1: ground (shield); Pin 2: “audio +”;
Pin 3: “audio -”. Use the included TA3F to XLRM interface cable to connect the receiver output
to a balanced microphone-level input on a camera, mixer or integrated amplifier.
Balanced Audio Output Jack: TA3M-type connector. Pin 1: ground (shield); Pin 2: “audio +”;
Pin 3: “audio -”. Use the included TA3F to XLRM interface cable to connect the receiver output
to a balanced microphone-level input on a camera, mixer or integrated amplifier.
The rear panel provides two balanced audio outputs (Outputs A & B). The unit is equipped with
an output select switch that assigns a signal to each of the audio outputs, as follows:
Output A (left) can be assigned either Receiver Channel 1 or Mix. (Mix = Ch. 1 and Ch. 2
signals mixed together. The relative levels of each signal can be adjusted using the individual
receiver level controls.)
Output B (right) can be assigned either Receiver Channel 1, Receiver Channel 2, or Mix.
Note: utput B is not active when Power Switch is in “1” position.
Typical configuration: Output A is assigned Channel 1; Output B is assigned Channel 2, feeding
individual channels in a mixer or camera. Many other options are available, providing much
flexibility. For instance:
• If your camera doesn’t accept two inputs, you can sum the signal from both transmitters
in Output A and connect this mixed signal to your camera.
• You can connect Output A (mixed signal) to a camera, and Output B (mixed signal)
to an audio mixer.
• When using the unit with a single transmitter with both outputs active (Power Switch set
at Both), Output A can be used to feed a camera, while Output B can feed an audio mixer
(both with identical signals from Receiver Channel 1).
The signal levels of each receiver signal (Receiver Channel 1 and Receiver Channel 2) may
be adjusted using these controls. When the outputs are assigned to a single receiver signal,
these controls will adjust the output level. (Turn clockwise to increase output level.) When the
outputs are assigned to Mix, these controls adjust the relative levels between the
receiver signals.
This switch assigns a signal to the monitor headphone output.
• Choose 1(left position) to hear Channel 1 in both ears (mono signal, stereo output);
• Choose 2(right position) to hear Channel 2 in both ears (mono signal, stereo output);
• Choose UT (middle position), to hear Output A in the left ear, and Output B in the right ear.
The level control (volume control) for headphones is independent of other level controls.
Turn to the right to increase the volume.
You may connect the unit to an external power supply (12V C source, 500 mA nominal
current, not included). In this case, move the Power Switch to the “Ext” position; both receiver
channels are activated (indicated by illumination of Power/Peak LE s 1 and 2).
1/4" TRS jack.
7
10
17
14 11
16 13 15
10
11
12
5
6
13
14
15
16
17
13
12 12
PIN 1 PIN 3
PIN 2

AT W-R1820 Dual-channel Receiver Batteries
Each AT W-R18 20 dual-channel receiver uses six 1.5V AA batteries, not included. Alkaline type is
recommended. Always replace all batteries. Make certain the receiver power is Off before
replacing batteries. Note:The AT W-R18 20 receiver also functions without batteries if connected
to an external power supply (12V DC source, 500 mA nominal current, not included).
1. Open the battery compartment door by pushing the catch back.
2. Observe correct polarity as marked and carefully insert six fresh 1.5V AA alkaline batteries
(see above).
3. Replace the door, making certain the latch clicks securely in place.
After the batteries are installed, turn the power on by moving the Power Switch to either the 1
or Both position. The small red power- on LE (s) (see aat left ) should light (red light at 1 if Power
Switch is in position 1; red light at 1 and 2 if Power Switch is in Both position) and the LC window
should come on. If this does not happen, the batteries are installed incorrectly or they are depleted.
The receiver’s “fuel gauge” battery indicator (see bat left ) displays a maximum of four bar
segments. When LC flashes “LOW.BAT”, the batteries should be replaced immediately to
ensure continued operation. Note: Battery indicator is only visible in the “Hold” position.
perating the Receiver
N TE: Receiver Channel 1 and Receiver Channel 2 must be set to different frequencies to
avoid interference. Transmitter-Receiver pairs must be set to identical frequencies: set
Transmitter 1 to the same frequency as Receiver Channel 1; set Transmitter 2 to the same
frequency as Receiver Channel 2.
Overview…
1. Turn the power on by moving the Power Switch to either the 1 position (for single-channel
operation) or Both position (for dual-channel operation).
2. Switch the ual-channel Control Switch to 1 (to set frequency for Receiver Channel 1) or 2
(to set frequency for Receiver Channel 2). Audio output is muted for the channel that is selected.
3. Press the Set button to enter the Frequency Selection Menu mode; the word “MENU” will appear.
4. Use the Up/ own arrows to cycle through functions:
- first arrow up is Manual Frequency Selection mode;
- second arrow up is Automatic Scan Group 1;
- third arrow up is Automatic Scan Group 2;
- fourth arrow up is Automatic Scan Group 3;
- fifth arrow up is Quit, allowing exit from Menu mode.
First…
Turn the power on by moving the Power Switch to Both (for dual-channel operation). To set
frequency for Receiver Channel 1, switch ual-channel Control Switch to 1 (left position).
1. Press Set button. The word “MENU” will appear. Press Up arrow to show current frequency.
Press Set button and frequency will begin to flash; then use up and down arrows to adjust
the frequency. Frequency changes in 25 kHz steps. To increase scroll speed, hold the Up or
own arrow for more than 4 seconds.
2. When you arrive at desired frequency, press and hold the Set button until the word “STORE ”
appears. Frequency is now set.
Battery Selection
Battery Installation
Battery Condition Indicator
Selecting Frequencies
on your Receiver
Dual-channel Operation
(using two transmitters)
Setting Receiver Frequency Manually
8
ab

3. To “back out” of the Manual Frequency Set mode without making a frequency choice, simply
press the Set button once to exit the menu and return the receiver to normal operation.
The word “ESCAPE” will appear in the window, and no changes in frequency setting will be
made; the receiver's audio output will again be enabled (when ual-channel Control Switch
is returned to Hold position).
To set frequency for Receiver Channel 2, switch ual-channel Control Switch to 2 (right position).
Repeat steps 1-2 above.
To lock settings and operate unit, switch ual-channel Control Switch to Hold (center position).
Note: While Channel Selection mode is still active, if the Dual-channel Control Switch is
moved back to Hold position before channel selection is complete, LED will remain red
and audio will remain muted until the control sequence is completed.
First…
Turn the power on by moving the Power Switch to Both (for dual-channel operation).
Then switch ual-channel Control Switch to 1 (left position).
1. Press the Set button to enter the Frequency Selection Menu mode; the word “MENU” will appear.
2. Use the Up or own arrow to reach Scan 1, Scan 2, or Scan 3. Press the Set button once to
select one of these three Scan groups. The word “SCAN1”, “SCAN2” or “SCAN3” will flash
in the LC window.
3. Press the Up or own arrow to begin the scan. Press the Up arrow to scan up from the lowest
frequency in the group; press the own arrow to scan down from the highest frequency
in the group.
4. The first available frequency will flash in the LC window. To activate this frequency selection,
press and hold the Set button until the word “STORE ” appears in the LC window.
5. If you do not wish to use the frequency found, you may press the Up or own arrow. The Up
arrow will scan upwards, the own arrow will scan downwards, from the frequency you are on.
6. To set frequency for Receiver Channel 2 (for dual-channel operation), switch ual-channel
Control Switch to 2 (right position). Repeat steps 1- 4 above. Note: Be certain to select the
same Scan Group that you used for Receiver Channel 1.
7. To lock settings and operate unit in dual-channel operation (using two transmitters), switch
ual-channel Control Switch to Hold (center position). The receiver will return to normal operation,
audio function will be restored and the ual-channel Control LE indictor will turn green.
8. If you are using multiple systems, use the same scan group for all receivers. After completing the
first receiver’s scan and frequency selections, set its transmitters to the appropriate frequencies
(see How to Set Frequen ies on your Transmitter, page 12 ); leave the transmitters 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 frequencies for the next receiver.
In the event that no more free frequencies are available within the scan group, the receiver will
indicate “EN ” on the receiver display. In this case, select a different scan group for both
Receiver Channels 1 and 2 and re-scan.
Note: While Channel Selection mode is still active, if the Dual-channel Control Switch is
moved back to Hold position before channel selection is complete, LED will remain red
and audio will remain muted until the control sequence is completed.
First…
Turn the power on by moving the Power Switch to the 1 position (for single-channel operation).
Switch ual-channel Control Switch to 1 (left position). Output from Receiver Channel 1 is now
muted. Note: utput B is not active when the Power Switch is in the “1” position.
1. Press Set button. The word “MENU” will appear. Press Up arrow to show current frequency.
Press Set button and frequency will begin to flash; use up and down arrows to adjust the
frequency. Frequency changes in 25 kHz steps. To increase scroll speed, hold the up or down
arrow for more than 4 seconds.
2. When you arrive at desired frequency, press and hold the Set button until the word “STORE ”
appears. Frequency (which appears on the screen) is now set.
3. To “back out” of the Manual Frequency Set mode without making a frequency choice, simply
press the Set button once to exit the menu and return the receiver to normal operation. The
word “ESCAPE” will appear in the window, and no changes in frequency setting will be
made; the receiver's audio output will again be enabled.
To lock settings, un-mute and operate the unit, switch ual-channel Control Switch to Hold
(center position).
Using the Automatic Scan Function
to Set Receiver Frequency
(dual-channel operation)
Single-channel Operation
(using one transmitter)
Setting Receiver Frequency Manually
9

First…
Turn the power on by moving the Power Switch to 1 (for single-channel operation). Then switch
ual-channel Control Switch to 1 (left position). Note: utput B is not active when Power
Switch is in the “1” position.
1. Press the Set button to enter the Frequency Selection Menu mode; the word “MENU” will appear.
2. Use the Up or own arrow to reach Scan 1, Scan 2, or Scan 3. Press the Set button once
to select one of these three Scan groups. The word “SCAN1”, “SCAN2” or “SCAN3” will
flash in the LC window.
3. Press the Up or own arrow button to begin the scan. Press the Up arrow to scan up from
the lowest frequency in the group; press the own arrow to scan down from the highest
frequency in the group.
4. The first available frequency will flash in the LC window. To activate this frequency selection,
press and hold the Set button until the word “STORE ” appears in the LC window.
5. If you do not wish to use the frequency found, you may press the Up or own arrow.
The Up arrow will scan upwards, the own arrow will scan downwards, from the
frequency you are on.
6. To lock settings and operate unit in single-channel operation (using one transmitter),
switch ual-channel Control Switch to Hold (center position). The receiver will return to
normal operation, audio function will be restored and the ual-channel Control LE
indicator will turn green.
Using the Automatic Scan Function
to Set Receiver Frequency
(single-channel operation)
10

Antenna
ower-on LED
LCD
Audio Input Jack
Microphone Input
ower/Mute Button
Up/Down Arrows
Set Button
Sliding Control Cover
(3-position)
Sliding Control Cover
Battery Door
Mounting Clip
AT W -T1801 UniPak®Body-pack &
AT W -T1802 Plug-on Transmitter Controls
The AT W -T1801 UniPak®body-pack 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 or try reposi-
tioning the receiver. Since the transmitter antenna simply screws in, check to make certain it is
snugly attached (finger-tight). Do not change the length of the transmitting antenna.
Green light indicates power is on and un-muted; red light indicates that audio is muted.
The light will blink when the batteries are low.
Liquid Crystal isplay presents setup and operating information. The LC 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. The display is illuminated with a backlight when you press Set to access transmitter
functions. The backlight will automatically turn off within a set period of time.
Connect an audio input device (microphone or guitar cable) to the audio input jack on the bottom
of the AT W -T1801 UniPak®Body-pack Transmitter. A number of Audio-Technica professional
microphones and cables are available separately, pre-terminated with a compatible input
connector (see page 14 ). The cable connector latches automatically when inserted into the
transmitter jack. To unlatch and remove the connector, pull up on the connector’s knurled
metal collar.
The AT W -T1802 plug-on transmitter has a 3-pin XLRF-type input connector with a locking collar.
Use either a dynamic or a condenser microphone. The transmitter provides power to condenser
microphones rated to operate on 12V phantom power or less. To attach the microphone, rotate
the threaded locking collar fully clockwise (“down”) until it reaches the transmitter housing (see
aat right). Press the microphone and transmitter together (see bat right). Rotate the thread-
ed collar “up” until it is firmly against the end of the mic (see cat right ). Make certain the mic
is securely attached before use. To detach the microphone, reverse the steps above. Always
loosen the threaded collar fully before attempting to disconnect the mic.
For on/off and mute functions.
Press Up or own arrows, in conjunction with the Set button, to choose operating frequencies
and access transmitter functions.
Use in conjunction with the Up/ own arrows, to choose operating frequencies and access
transmitter functions.
This 3-position sliding cover on the body-pack transmitter’s control panel prevents accidental
shut-off or channel-switching.
This sliding cover on the plug-on transmitter’s control panel helps to prevent accidental shut-off
or channel-switching.
Open by sliding the catch down (on body-pack) or pushing in direction of arrow (on plug-on transmitter).
The AT W -T1801 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 and
reinstall it facing in the opposite direction.
11
POWER/MUTE
SET
POWER
MUTE
SET
ATW-T1801 UHF TRANSMITTER
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abc

Battery Selection
Transmitter Battery
Installation
Battery Condition
Turning your Transmitter On & Off
How to Set Frequencies
on your Transmitter
How to Access & Use the Function Menu
on your Transmitter
POWER
MUTE
SET
ATW-T1801 UHF TRANSMITTER
POWER/MUTE
SET
Transmitter Batteries
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.
1. Open the battery compartment door by sliding the catch down (on body-pack) or pushing in
direction of arrow (on plug-on transmitter).
2. Observe correct polarity as marked on the metal contacts on the door and carefully insert
two fresh 1.5V AA alkaline batteries.
3. Close the door, making certain the latch clicks securely in place.
After the batteries are installed, turn the power on by pressing and holding the Power/Mute
button. The small power-on LE (see aat left ) should light green and the LC window should
come on. If this does not happen, the batteries are installed incorrectly or they are depleted.
The transmitter’s “fuel gauge” battery indicator in the LC displays a maximum of four bar seg-
ments. When it flashes “LOW.BAT”, the batteries should be replaced immediately to ensure
continued operation. (Additionally, the power-on LE will flash when the batteries are low.)
perating theTransmitter
To turn the transmitter on, press and hold the Power/Mute button until the power indicator
lights green, and the LC window comes 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 power indicator
and the LC window are extinguished (about 1-2 seconds). The LC window will show
“PWR.OFF” before shutdown.
N TE: Transmitter-Receiver pairs must be set to identical frequencies: set Transmitter
1 to the same frequency as Receiver Channel 1; set Transmitter 2 to the same frequency
as Receiver Channel 2.
1. Turn transmitter on.
2. Press the Set button once and the small word “MENU” will appear above the frequency.
3. Press the Set button again and the small flashing word “E IT” will appear to the right
of “MENU”.
4. Use the Up/ own arrows to change the transmitter frequency. Press either arrow for 25 kHz
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.
5. To activate this frequency selection, press and hold the Set button until the word “STORE ”
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.)
6. When finished entering a frequency, press the Up arrow 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.
1. Turn transmitter on.
2. Press the Set button once; the small word “MENU” will appear above the frequency.
3. When in the Menu mode, use the Up and own arrows to cycle through the following functions:
• Frequency • Input Select (body-pack only)
• RF Power • Reset to efaults
• Audio Input Level • Quit (exit menu)
• Power/Mute Locks
4. To make a change in the default setting:
• Press Set button once;
• Press Up or own arrow until you reach desired setting;
• Press and hold Set button until the word “STORE ” appears in the LC 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.)
12
a
AT W - T 18 01 AT W - T 1802

Transmitter Functions
RF ower Adjustments on your Transmitter
Audio Input Level (Gain) Adjustments
on your Transmitter
Using the Mute and Un-Mute Functions
on your Transmitter
ower/Mute Locks
Audio Input Selector
(continued on page 14)
13
Function Menu Default Setting Choices (Edit) Wrap-around*
Frequency Lowest in band 996 frequencies Yes
(25 kHz steps)
RF Power RF LOW RF LOW, RF HI Yes
Audio Input Level +6 dB -6 dB, 0 dB, +6 dB, No
+12 dB, +18
Power/Mute Locks NO.LOC NO.LOC, ALL.LOC, Yes
MUT.LOC, PWR.LOC
Input Select** MIC MIC, INST Yes
Reset to efaults PRESET See Restore Default –
Settings, page 14
Quit QUIT Press Set to exit –
* Continue in the same Up/ own direction and choices “wrap around” to the other end
of the range.
** On UniPak®transmitter only
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 multichannel systems, or when operating very close to the receiver, to
reduce the possibility of interference or receiver RF overload.
Correct adjustment of transmitter audio input, receiver audio output, and mixer/amplifier input
and output levels is important for best performance.
A 5-position audio input gain setting, selected through the function menu, allows you to match
the audio input level to the transmitter for best modulation with minimum distortion. The choices
are +18, +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”).
When the transmitter is muted, it produces RF with no audio. 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. The word “MUTE” will
appear in the LC window, just below the frequency, and the Power-on LE will turn red.
To un-mute the transmitter (restore the audio), press and release the Power/Mute button once
again. The “MUTE” will disappear from the LC window, and the Power-on LE will turn green.
The Power/Mute button can be programmed (through the function menu): power can be locked
On; Mute can be locked either On or Off.
Setting Description
NO.LOC The Power and Mute functions operate normally.
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.L C”
must be re-accessed and the setting changed to turn the transmitter off.
MUT.LOC In “MUT.LOC” 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.)
PWR.LOC Power is locked On as of the time “PWR.LOC”is applied. The Mute functioning
is unaffected. Note: When in the “PWR.L C” mode, the transmitter may be
turned off by: (1) Re-accessing the .L C 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 “N .L C” 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 LC will
display “LOC.KE ” briefly, then return to its previously-displayed contents.
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 are available pre-terminated with the appropriate
professional latching connector.
Select the desired input – microphone or instrument – through the function menu; “MIC” or
“INST” will show in the LC window, just below the frequency.

perating theTransmitter (continued)
1. A “PRESET” selection in the menu allows you to reset all transmitter functions to their
factory-default values.
2. Press the Set button once to move to Menu mode.
3. Press the Up arrow twice to move to “PRESET” in the LC window.
4. Press the Set button once and “LOA ” will appear in the LC .
5. Press and hold the Set button until “ EF” appears in the LC .
6. Press and hold the Set button until “LOA E ” appears briefly in the LC . The window will
then revert to “PRESET”.
7. Press the own arrow once to move to “QUIT”.
8. Press the Set button once to exit the Menu mode and return to normal operation, with all
factory-default settings restored.
Tips for Best Results
1. Use only fresh alkaline batteries. Always replace all batteries.
o not use “general purpose” (carbon-zinc) batteries.
2. Position the dual-channel receiver so that it has the fewest possible obstructions between it
and the normal location of the transmitters. Line-of-sight is best.
3. The transmitters and the dual-channel receiver should be as close together as conveniently
possible, but no closer together than three feet.
4. The receiver antennas should be in the open and away from any metal.
5. Each transmitter-receiver pair must be set to the same frequency.
6. Only one transmitter on a given frequency should be “on” at a time.
7. The power switch on the transmitter has four positions: “Ext.,” “Off”, “1” and “Both.”
8. If the “Out Level” of either receiver channel is set too high, it may over-drive the input of the
camera/mixer or clip the output of the receiver, causing distortion. Conversely, if the receiver
output is set too low, the overall signal-to-noise ratio of the system may be reduced.
9. You need to change channels 1) when a strong interference signal is received, 2) when the
channel breaks down, or 3) during multiple-system operation in order to select an interference-
free channel. Always turn the units off before changing frequencies.
10.Turn the receiver and transmitter off when not in use. Remove the batteries during long-term storage.
14
Restore Default Settings

15
Overall System
ATW-R1820 Dual-channel Receiver
ATW-T1801 Uni ak ®Body-pack Transmitter
ATW-T1802 lug-on Transmitter
Specifications†
UHF Operating Frequencies
Band C: 541.500 to 566.375 MHz
Band : 655.500 to 680.375 MHz
Number of Operating Frequencies 996 total per band (25 kHz increments)
Frequency Stability ±0.005%, Phase Lock Loop frequency control
Modulation Mode FM
Normal eviation ±10 kHz
Operating Range 100 m (300') typical
Operating Temperature Range 23˚ F (-5˚ C) to 11 3˚ F (45˚ C)
Frequency Response 70 Hz to 15 kHz
Receiving System ual independent RF sections,
automatic-switching diversity
Image Rejection >50 dB typical
Signal-to-Noise Ratio 104 dB at 30 kHz deviation (A-weighted),
maximum modulation 37 kHz
Total Harmonic istortion <1% (±10 kHz deviation at 1 kHz)
Sensitivity 25 dBµV, (S/N 60 dB at 5 kHz deviation, A-weighted)
Audio Output (balanced) 27 mV (at 1 kHz, ±5 kHz deviation)
Output Connector 3-pin mini XLR (TA3M-type)
Monitor Headphone Output (typical) 35 mW max., 32 ohm load (per channel)
Monitor Headphone Jack 3.5 mm TRS, signals on both Tip and Ring
External Power Requirements 12 V C nominal, 500 mA
Batteries (not included) Six 1.5V AA alkaline
Current Consumption (battery)
ual-channel Operation 600 mA typical
Single-channel Operation 350 mA typical
Battery Life
ual-channel Operation 6 hours typical*
Single-channel Operation 10 hours typical*
* depending on battery type and use pattern
imensions 85.0 mm (3.35") W x 133.0 mm (5.24") H x 36.0 mm (1.42")
Net Weight (without batteries) 425 grams (15.0 oz)
Accessories Included Two flexible UHF antennas; two 18" TA3F to XLRM
output cables; belt pouch
RF Power Output High: 30 mW; Low: 10 mW, nominal
Spurious Emissions Under federal regulations
ynamic Range >105 dB, A-weighted
Input Connections High impedance, low impedance, bias
Batteries (not included) Two 1.5V AA alkaline
Current Consumption High: 180 mA; Low: 160 mA, typical
Battery Life Approximately 6 hours (High); 8 hours (Low),
depending on battery type and use pattern
imensions 66.0 mm (2.60") W x 87.0 mm (3.43") H x 24.0 mm (0.94")
Net Weight (without batteries) 80 grams (2.8 oz)
RF Power Output High: 30 mW; Low: 10 mW, nominal
Spurious Emissions Under federal regulations
ynamic Range >105 dB, A-weighted
Input Connector 3-pin locking XLRF-type
Microphone Power Provides power to condenser microphones rated to
operate on 12V phantom power or less.
Batteries (not included) Two 1.5V AA alkaline
Current Consumption High: 180 mA; Low: 16 0 mA, typical
Battery Life Approximately 6 hours (High); 8 hours (Low),
depending on battery type and use pattern
imensions 40.0 mm (1.57") x 111.0 mm (4.37") x 40.0 mm (1.57")
Net Weight (without batteries) 19 9 grams (7.0 oz)
† Specifications are subject to change without notice.

Audio-Technica U.S., Inc.
1221 Commerce rive, Stow, Ohio 44224 [phone]
www.audio-technica.com
P52016-01 ©2011 Audio-Technica U.S., Inc. Printed in U.S.A.