AUDIO TECHNICA 2000SERIES
Owner's Manual

System Operation
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 segments 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: Before the channel has been set, a touch (momentary press) of the Set/Scan (rather than a hold) will revert the channel to its previous setting. 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 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 distortion 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 screwdriver 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. CAUTION! The small trimmer controls are delicate; use only the supplied screwdriver. Do not force the trimmers beyond their normal 180° range of rotation. Return the screwdriver to its storage clip when not in use.

To change channel automatically 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� position 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.

Figure I-Handheld Transmitter Interior View
Level Trim Control

LEVEL

MAX

Channel Selector Switch
1 CH

Screwdriver

9 3

7 5

7