Audio Technica ATW-1821 Owner's Manual page 14

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," and "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.
WIRELESS ESSENTIALS™ MICROPHONES AND CABLES
All Wireless Essentials accessories are terminated for use with UniPak™
transmitters.
AT829cW Miniature cardioid condenser lavalier microphone. Includes clothing
clip and windscreen.
MT830cW Miniature omnidirectional condenser lavalier microphone. Includes
clothing clip and windscreen.
MT830cW-TH "Theater" model, same as MT830cW except beige color mic and
cable.
AT831cW Miniature cardioid condenser lavalier microphone. Includes clothing
clip and windscreen.
AT889cW Headworn noise-canceling condenser microphone. Includes
windscreen and cable clip.
AT892cW MicroSet® headworn omnidirectional condenser microphone. Includes
element covers, windscreens, moisture guard and clothing clip.
AT892cW-CO Same as AT892cW except cocoa-color mic, earset and cable.
AT892cW-TH "Theater" model, same as AT892cW except beige color mic,
earset and cable.
AT898cW Subminiature cardioid condenser lavalier microphone. Includes
clothing clip base, viper clip base, magnet clip base,
three single mic holders, two double mic holders and two windscreens.
AT899cW Subminiature omnidirectional condenser lavalier microphone. Includes
AT899AK accessory kit.
AT899cW-TH "Theater" model, same as AT899cW except beige color mic and
cable. Includes AT899AK-TH accessory kit.
ATM350cW Cardioid condenser instrument microphone. Includes AT8418 clip-
on instrument mount.
ATM73cW Headworn cardioid condenser microphone. Includes windscreen.
ATM75cW Headworn cardioid condenser microphone. Includes windscreen.
PRO8HEcW Headworn hypercardioid dynamic microphone. Includes windscreen
and cable clip.
PRO35cW Cardioid condenser instrument microphone. Includes AT8418 clip-on
instrument mount.