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WIRELESS SYSTEM ADJUSTMENTS
TRANSMITTER AUDIO GAIN ADJUSTMENT
AXSGW Systems: The audio gain control on the transmitter in
these systems is factory-preset at the minimum setting (full
counterclockwise) to reduce the risk of overload and distortion.
If the red TRANSMITTER AUDIO PEAK light on the receiver
does not
flicker when the guitar is played loudly and its volume
controls are turned all the way up, increase the transmitter gain
level. This will ensure the best signal-to-noise ratio for perfor-
mance. See Figure 9.
AXSHW Systems: The audio gain control on the transmitter in
the headset systems is factory preset at the maximum setting
(full clockwise). This is because the microphone in the WH20 is
a low output, dynamic microphone. It may be necessary to re-
duce the transmitter gain until the red TRANSMITTER AUDIO
PEAK light flickers only when you speak or sing loudly. This will
ensure the best signal to noise ratio for performance. See Fig-
ure 9.
AXS31/AXS58/AXSLWD: The audio gain controls on the trans-
mitters in these systems have been factory preset at the mid-
range position. This will provide the best results in most applica-
tions. However, for singers or presenters with quiet voices, the
audio gain may need to be increased for better signal-to-noise ra-
tio. Increase the gain until the receiver’s TRANSMITTER AUDIO
PEAK light flickers when you speak in a loud voice. For those with
loud voices, the preset gain level may be too high, causing un-
wanted distortion. In this case, the PEAK indicator will glow con-
tinuously when you sing or speak in a loud voice and the gain
level should be reduced. See Figure 9.
FIGURE 9. GAIN ADJUSTMENT
+
-
9 V
AXB1/AXB1G
AXH2
•
To Increase Gain:
Rotate the transmitter gain control clock-
wise with the supplied screwdriver until the red TRANS-
MITTER AUDIO PEAK light on the receiver flickers when
the guitar is played loudly, or when you sing or speak in a
loud voice.
•
To Reduce Gain:
Rotate the transmitter gain control counter-
clockwise until the red TRANSMITTER AUDIO PEAK light
on the receiver flickers only when the guitar is played
loudly, or when you speak or sing in a loud voice.
•
To Return Audio Gain to the Factory Setting:
Rotate the
transmitter audio gain control counterclockwise as far as it
will go (AXSGW systems), clockwise as far as it will go
(AXSHW systems), or to mid position (AXS31, AXS58 and
AXSLWD Systems).
RECEIVER VOLUME ADJUSTMENT
The volume control on the front panel of the AXR3 and AXR4N
receivers can be adjusted to make the wireless system output
level identical to that of a cabled guitar or bass or wired micro-
phone. After making any necessary transmitter gain adjust-
ments, adjust the receiver volume control until the output reach-
es the desired level. Rotate the volume control clockwise to
increase
output. Rotate it counterclockwise to
decrease
output.
RECEIVER SQUELCH ADJUSTMENT
The squelch control on the AXR3 and AXR4N receivers is
factory preset for optimum performance. No further adjust-
ment is normally required. It is possible to adjust the squelch
control setting to emphasize either signal quality or system
range:
•
Turning the squelch control clockwise causes the receiver
to demand a higher quality signal (less noise before mut-
ing), but
decreases
operating range.
•
Turning the squelch control counterclockwise allows a low-
er quality signal through (more noise before muting), but
in-
creases
operating range.
To return the receiver squelch control to the factory setting, ro-
tate it to the mid-range position (so the slot is vertical).
ABOUT THE SHURE NOISE SQUELCH SYSTEM
Conventional squelch circuits analyze RF signal strength. Conse-
quently, they cannot discriminate between noise and desired sig-
nals. When a wireless system is used in a noisy RF environment,
conventional circuits may “open” unexpectedly, sending loud
bursts of noise through the receiver when the transmitter’s signal is
weak or turned off. Unlike conventional wireless systems, Shure
T-Series systems use a noise squelch circuit that analyzes
signal
quality
instead of signal strength. A special detector monitors the
level of high frequency noise. When the transmitter signal is
strong, the system’s noise level is low and the receiver sends au-
dio through. When the transmitter signal is weak or absent, the
system’s noise level is high and the squelch circuit will mute the
receiver. This virtually eliminates the possibility of annoying bursts
of noise coming through your receiver.
TIPS FOR ACHIEVING MAXIMUM PERFORMANCE
•
Make sure you can always see a receiver antenna from the
transmitter position.
•
Keep the distance between the transmitter and the receiv-
er antennas short.
•
Avoid placing the receiver antennas near metal surfaces
and obstructions. They will reduce system performance.
•
To mount the receiver on a flat surface, attach the four
adhesive rubber feet or secure the receiver to the surface
with the supplied cloth fastening strips.