17
Setting Up and Using the
UHF Series System
8. Next, it’s time to turn on your transmitter and set the audio levels. If
you are using the UH-4 transmitter or the UT-4 transmitter with a con-
nected lavalier or headset microphone, speak or sing into the mic at a
normal performance level while slowly raising the Volume knob on the
receiver. Observe the receiver’s AF Level display as you do so; one or
more segments should light up. If you are using the UT-4 transmitter
with a connected instrument, play the instrument at normal performance
level while slowly raising the Volume knob on the receiver; again, one or
more segments in the AF Level display should light up. For optimum
signal-to-noise ratio, adjust the Volume knob so that the “0” segment
(third from the top) lights frequently, with the “+3” and “+6” segments
lighting only occasionally. Note that unity gain is achieved with a Volume
knob setting of approximately 8.
9. Temporarily mute the audio signal by placing the UH-4 or UT-4 Mute
switch to the “On” position. Then turn on your connected amplifier
and/or mixer but keep its volume all the way down. Next, unmute the
audio signal (by placing the UH-4 or UT-4 Mute switch to the “Off” posi-
tion) and speak into the microphone (or play the instrument) at a normal
performance level. Slowly raise the volume of your amplifier and/or
mixer until the desired level is reached. If you hear distortion at the
desired volume level, first make sure that the gain structure of your audio
system is correctly set (consult the owners manual of your mixer and/or
amplifier for details). If it is and distortion is still present, do the following:
• If you are using a UT-4 beltpack transmitter, use the supplied plas-
tic screwdriver to turn its MIC Level or GTR Level control (trimpot)
slowly counterclockwise until the distortion disappears.
• If you are using a UH-4 handheld transmitter, use the supplied
plastic screwdriver to turn its Audio Level control (trimpot) slowly
counterclockwise until the distortion disappears.
Conversely, if you hear a weak, noisy signal at the desired volume level,
again make sure that the gain structure of your audio system is correctly
set (consult the owners manual of your mixer and/or amplifier for details).
If it is and the signal coming from the UR-4 is still weak and/or noisy, do
the following:
