Audio Technica ATW-2120 Installation And Operation Manual page 8

Setting Levels (Continued)
ATW-T210 UniPak™ Transmitter
Trimmer adjustments in the UniPak™ transmitter (Fig. E) will
enable you to use microphones 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 on page 5.
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.
8
System Operation
(Continued)
Figure E-UniPak Transmitter Open
Channel
Selector
Battery-keeper
Arm (open);
Screwdriver on
opposite side
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
interference 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 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
Audio-Technica. Extensive wireless information also is available
on the Audio-Technica Web site at www.audio-technica.com.
Antenna
Power-on LED
Audio Input Jack
Instrument/Microphone
CH LEVEL
INST MIC
1
Level Trim Controls
9 3
MAX MAX
7 5
Transmitter
Door