Specifications

System Operation
Setting Channels
Use the provided screwdriver to set the channel selector
switches on the receiver and transmitter to the same
frequency (Fig. A/C/D).
As an example, setting the X10 selector on “5” and the X1
selector on “2” designates channel 52, operating at 734.625
MHz as shown on the chart on page 7.
Be certain the units are turned off when making
frequency changes.
Receiver On . . .
Turn down the output level of the receiver (OUT LEVEL) and
the input level control of the camera or mixer.
Turn the receiver on, choosing either “INT” (internal battery)
or “EXT” (external DC source) as appropriate. The power
indicator LED (PWR) will light up strongly with fresh batteries.
(If the LED becomes dim or extinguished, the batteries are
weak and should be replaced immediately for reliable
operation.)
If the tuner operation indicator LEDs (A and B) flicker, there
may be RF interference. If this occurs, select another
frequency. (Always turn the receiver off when making
frequency changes.)
Transmitter On . . .
Before turning on the transmitter, be certain the transmitter
channel selector switches are set to the same numbers as
those on the receiver.
Turn the transmitter on.
The transmitter has a three-position power switch. When
the switch is set to “Standby,” (“ST.BY”) the transmitter
produces RF with no audio signal. When the switch is “On,”
the transmitter produces both RF and audio. With the
switch “Off,” there is minimum noise output from the
receiver due to a special A-T muting system.
Setting Mic Levels
CAUTION! Adjust the Mic Level control
carefully . Unlike the
Channel Selector switches, it will
not rotate continuously!
The microphone input accommodates a wide range of mics
with typical sensitivity ratings of 1.5 mV (–56 dBV) to 15 mV
(–36 dBV) at 1 Pascal/94 dB SPL, while providing excellent
signal-to-noise ratios and maximum-acoustic-input levels.
1. Set the transmitter Mic Level control to the full
counter-clockwise (Lo) position.
2. Make an initial adjustment of the receiver output and
camera/mixer input level controls that will allow audio
through the system as you increase the transmitter Mic
Level.
3. Plug in the mic and power up the system.
4. While speaking/singing into the microphone at typically-loud
levels, increase the transmitter Mic Level adjustment until
the maximum audio output of the mic lights the receiver’s
Peak indicator. (Do not set the transmitter level too high –
doing so will cause the system to overload and distort.)
5. Now, while speaking/singing into the microphone at
typically-loud levels, adjust the output level of the receiver
so the highest sound pressure level going into the
microphone causes no input overload in the camera/mixer,
and yet permits the camera/mixer level controls to operate
in their “normal” range (not set too high or too low). This
provides the optimum signal-to-noise for the entire system.
Setting Line Level (ATW-T101)
When using a line-level source with the ATW-T101
transmitter, set the input level using the same method given
above. The Mic Level (MIC LVL) control adjusts audio gain for
both mic and line inputs.
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.
5
ATW-T102 Input Connections
Pin 1 Case Ground
Pin 2 Audio “+” and 5V DC bias
Pin 3 Audio “–” and 5V DC bias
Use a dynamic microphone, or a condenser mic with an
internal battery. In addition, the ATW-T102 provides a bias
voltage of +5V on Pins 2 and 3 which will power some
“battery/phantom” mics designed to work at this low voltage.
However, the ATW-T102 will not power a “phantom
powered” mic which requires the more-typical 12 to 48 volts.
Use of the bias voltage will reduce battery life slightly.
Presence of the bias voltage will not affect dynamic
microphones.
Transmitting Antenna
The ATW-T101 body-pack transmitter includes a permanently-
attached flexible antenna. For best results, allow the antenna
to hang freely and full length from the bottom of the
transmitter. If the received signal is marginal, experiment
with different transmitter positions on your body; or try
repositioning the receiver. Do not attempt to remove, replace
or change the length of the transmitting antenna. (The
stainless-steel mounting clip may be oriented in one of four
“directions.” Loosen its mounting screw, reposition the clip
in the case recess as desired and re-tighten the screw.)
The ATW-T102 plug-on transmitter’s antenna is housed in a
non-metallic section between the metal transmitter case and
the mic connector. For best operation, hold the body of the
microphone itself and do not cover or obstruct the antenna
area.