User's Manual

Shure Incorporated
18/28
Issue Indicator Status Solution
Receiver LED screen off
Make sure DC adapter is securely plugged into electrical
outlet.
Make sure receiver is powered on.
Transmitter indicator LED
flashing red
Replace transmitter batteries (see Changing Batteries).
Audio artifacts or dropouts Ready LED flickering or off
Change receiver and transmitter to a different group and/
or channel.
Identify nearby sources of RF interference, and shut
down or remove source.
Replace transmitter batteries.
Ensure that receiver and transmitter are positioned with
in system parameters
System must be set up within recommended range and
receiver kept away from metallic surfaces.
Transmitter must be used in line of sight from receiver for
optimal sound
Distortion
Audio LED on receiver indi
cates overload (red)
Reduce transmitter gain (see Adjusting Gain).
Sound level variations when
switching to different
sources
N/A
Adjust transmitter gain as necessary (see Adjusting
Gain).
Receiver/transmitter won't
turn off
LED/display flashing rapidly See Locking and Unlocking Controls.
Specifications
System
Working Range
91 m (300 ft) Line of Sight
Note: Actual range depends on RF signal absorption, reflection and interference.
Audio Frequency Response
50 to 15,000 Hz
Note: Dependent on microphone type
Total Harmonic Distortion
Ref. ±33 kHz deviation with 1 kHz tone
0.5%, typical