5
Ten Tips To Obtain The Best Results
System Operation
1. Use only fresh alkaline batteries. Do not use “general purpose”
(carbon-zinc) batteries.
2. Position the receiver so that it has the fewest possible
obstructions between it and the normal location of the transmitter.
Line-of-sight is best.
3. The transmitter and the receiver must be set to the same
frequency. Set or change transmitter frequency only when its
power is turned
off
.
4. The transmitter and the receiver should be as close together as
conveniently possible, but not less than 6' (2 m).
5. Do not place the receiver antennas within 3' (1 m) of another
receiver or antenna.
6. The receiver antennas should be kept away from any metal.
7. A receiver cannot receive signals from two transmitters at the
same time.
8. If the volume control of the receiver is set too high, it may
over-drive the input of the mixer/amplifier, causing distortion.
Conversely, if the receiver output is set too low, the overall signal-
to-noise ratio of the system may be reduced. Adjust the output
level of the receiver so the highest sound pressure level going
into the microphone (or the loudest instrument playing level)
causes no input overload in the mixer, and yet permits the 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.
9. Turn the transmitter off when not in use. Remove the battery if
the transmitter is not to be used for a period of time.
10. Unplug the receiver from the AC outlet when the system is not
in use.
Turn down the receiver volume control and the mixer/amplifier
level before starting up the wireless system. Do
not
switch on
the transmitter yet.
Receiver on...
Plug the power cordset into an AC power source. The red
Power indicator on the front panel will light. Using the rotary
switch (CH) on the front panel, select channel “0” through “9.”
Refer to page 6 to help choose an appropriate operating fre-
quency for your area.
Transmitter on...
Before
turning on the transmitter, use the provided screwdriver
to set its channel switch
to the same channel selected on the
receiver.
When the transmitter is switched on, the receiver’s yellow RF
signal indicator will light. The transmitters have a 3-position
power switch. When the switch is set to “Standby” (ST), the
transmitter produces RF with no audio signal. When the switch
is “On,” the transmitter produces both RF and audio. Maximum
audio input to the transmitter will cause the receiver’s red AF
Peak indicator to light.
When setting or changing the transmitter frequency, always
turn the transmitter power off first, set the frequency, then
turn the transmitter back on.
Receiver Squelch
The squelch control on the rear panel of the receiver is preset
at the factory, but can be adjusted if you must use the system
in a high RF interference area. If there is audio output from the
receiver when your transmitter is off, adjust the squelch control
so the system will receive the signal from your transmitter but
“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
which reliably mutes the unwanted RF signals.
Input Level Adjustment
An input trimmer control (Trim) in the transmitters enables you
to maximize performance for a particular microphone or guitar
sensitivity, or to adjust for different acoustic input levels.
Adjusting Input Level - UniPak Transmitter
Slide the battery cover off the top part of transmitter and
remove the screwdriver from its clip (Fig. E). Gently turn the
Trim control to its full counterclockwise position (marked “L”).
• Microphone: Adjusting input level
While speaking /singing into the microphone at typically-loud
levels, carefully turn the Trim control clockwise while
watching the receiver’s AF Peak indicator. Increase the Trim
control setting until the AF Peak indicator lights. This indicates
that maximum transmitter modulation without significant
distortion has been reached.
• Guitar/Instrument: Adjusting input level
While playing at typically-loud levels, carefully turn the Trim
control clockwise while watching the receiver’s AF Peak
indicator. Increase the Trim control setting until the AF Peak
indicator lights. This indicates that maximum transmitter
modulation without significant distortion has been reached.
After adjusting input level, return the screwdriver to its clip and
reinstall the battery cover. No further transmitter gain adjust-
ments should be needed, as long as the input device and the
acoustic input level are not changed.
Adjusting Input Level - Handheld Transmitter
Unscrew the lower body cover and slide it downward, exposing
the screwdriver and Trim control (Fig. G/H). Remove the screw-
driver and gently turn the Trim control to its full counterclock-
wise position (marked “L”).
While speaking /singing into the microphone at typically-loud
levels, carefully turn the Trim control clockwise while watching
the receiver’s AF Peak indicator. Increase the control setting
until the AF Peak indicator lights. This indicates that maximum
transmitter modulation without significant distortion has been
reached.
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 190
o
range of rotation.
Return the screwdriver to its storage clip when not in use.
