7
E
N
Switch on the receiver. Do
not
switch on the transmitter yet.
Receiver On…
The LCD display will light up and one of the tuner operation indicator LCD segments (A
or B) will light, even though the transmitter is not on. If two or more of the RF LCD seg-
ments light up at this point, there may be RF interference in the area. If this occurs,
change operating channels (select another frequency).
How to Make Operating Channel Changes
Operating channel changes (frequency changes) may be made in two ways: manually
and automatically.
To change channel manually
1. Use the Up/Down arrow buttons to reach the desired channel number.
2 Hold the Set/Scan button until the channel number stops flashing to set the
receiver to the channel indicated. NOTE: Alternatively before setting the channel
displayed, a touch (momentary press) of the Set/Scan (rather than a hold) will
revert the channel to its previous setting.
To change channel automatically
See Figure D-Rear Panel Controls and Functions
1. Hold the Set/Scan button. The Automatic Scan/Set Mode will automatically
scan for and set the next open channel. LCD screen will flash “FS” four times
to indicate start of scan.
Transmitter On…
Before turning on the transmitter, use the provided screwdriver to set the transmitter
channel selector switches (Fig. E/I) to the same numbers as those displayed on the
receiver. Always turn the transmitter off when changing channels (frequencies).
The transmitters have a two-position, on-off power switch. When the switch is “On,”
the transmitter produces both RF and audio.
There is about a half-second delay after the transmitter is switched to the “On” posi-
tion before the receiver’s Tone Lock squelch un-mutes the receiver.
When the transmitter is switched on and in normal operation, the receiver’s RF signal
level indicators will display as dark segments (signal strength indicators) from bottom
to top at the left side of the LCD display.
Setting Levels
Correct adjustment of transmitter audio input, receiver audio output, and
mixer/amplifier input and output levels is important for optimum system performance.
ATW-T220 Handheld Transmitter
See Figure I-Handheld Transmitter Interior View
The 2000 Series handheld transmitter has factory pre-set audio input levels. Factory
setting is full clockwise, maximum gain.
While speaking/singing into the microphone at typically loud levels, check the AF meter
levels on the receiver. If all five AF meter bars are consistently illuminated and distor-
tion is heard through the system, it may be necessary to adjust the transmitter audio
input level.
To adjust the transmitter audio input level, unscrew the lower body cover and slide it
downwards, exposing the screwdriver and level trim control (Fig I). Remove the screw-
driver and gently turn the level trim control counterclockwise until the topmost receiver
AF level meter bar is illuminated only on audio peaks.
Return the screwdriver to its clip and close and secure the lower body. No further
transmitter gain adjustments should be needed, as long as the acoustic input does not
change significantly.
ATW-T210 UniPak™ Transmitter
See Figure E-UniPak Transmitter Open
Trimmer adjustments in the UniPak™ transmitter (Fig. E) will enable you to use micro-
phones or instruments with different output levels.
1. For MIC: Set microphone level trim control fully clockwise (maximum) and
instrument level trim control fully counterclockwise (minimum).
For INSTRUMENT: Set instrument level trim control fully clockwise (maximum)
and microphone level trim control fully counterclockwise (minimum).
2. Set the receiver’s AF Level control to its full clockwise position (maximum).
See Figure D.
3. Plug the mic or instrument into the transmitter and power up the system.
4. For MIC: Make an initial adjustment of the mixer’s level controls that will allow
audio through the system.
For INSTRUMENT: Make an initial adjustment of the instrument amplifier input
level control that will allow audio through the system.
5. For MIC: While speaking/singing into the microphone at typically loud levels,
check the AF meter levels on the receiver. If all five meter bars are
consistently illuminated and distortion is heard through the system, it may be
necessary to adjust the UniPak transmitter audio input level. To adjust the
transmitter audio input level, gently turn the microphone level trim control
counterclockwise until the topmost receiver AF level meter bar is illuminated
only on audio peaks.
For INSTRUMENT: While playing the instrument at typically loud levels, check
the AF meter levels on the receiver. If all five meter bars are consistently
illuminated and distortion is heard through the system, it may be necessary to
adjust the UniPak transmitter audio input level. To adjust the transmitter audio
input level, gently turn the instrument level trim control counterclockwise until
the topmost receiver AF level meter bar is illuminated only on audio peaks.
6. For MIC: While again speaking/singing into the microphone at typically loud
levels, adjust the mixer’s input trim control so the highest sound pressure level
going into the micro-phone causes no input overload in the mixer, and yet
permits the mixer’s channel and output level controls to operate in their
“normal” range (not set too high or too low).
For INSTRUMENT: While again playing the instrument at typically loud levels,
adjust the receiver’s AF Level control so the highest signal level causes no
input overload in the instrument amplifier and yet permits the amplifier’s input
level controls to operate in their “normal” range (not set too high or too low).
Note: If the mixer cannot be adjusted to operate in its normal range without
distortion, adjust the receiver’s AF Level Control (turn counterclockwise) until
the mixer/amplifier is no longer overloaded.
Receiver Squelch
The squelch control on the back panel of the receiver is preset at the factory for best
system performance (factory setting is full counterclockwise), but can be adjusted if
you must use the system in an area with considerable RF interference. If there is inter-
ference in the audio, and changing the channel is not an option, adjust the squelch
control so the system will receive the signal from your transmitter but will “squelch” or
eliminate the unwanted background RF noise. This adjustment can cause a reduction
in useable range of the wireless transmitter, so set the control to the lowest position
that reliably mutes the unwanted RF signals.
RF Interference
Please note that wireless frequencies are shared with other radio services. According
to National Regulations, “Wireless microphone operations are unprotected from inter-
ference 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 con-
tact your dealer or Audio-Technica.
System Operation
CAUTION! The small trimmer controls are delicate; use only the supplied screw-
driver. Do not force the trimmers beyond their normal 180° range of rotation.
Return the screwdriver to its storage clip when not in use.
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