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 using a non-”x” unit, 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 9. (With an “x” unit, channel 52 is 662.625 MHz, as shown on page 10.)

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”/”STAND 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.Plug in the mic and power up the system.

2.Set the Mic Level control to the full clockwise (Hi) position. Speak/sing into the microphone at typically-loud levels while watching the Peak indicator on the receiver. If the Peak indicator lights, turn the Mic Level control down (counter-clockwise) only to the point where the indicator light no longer illuminates. (When the AF Peak indicator lights, the transmitter audio level is driving the receiver into distortion. For best audio, the Mic Level should be set as high as possible, but not so high as to light the Peak indicator.)

3.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(x)

When using a Hi-Z line-level source with the ATW-T101(x) 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.