15
English
Troubleshooting
Issue See Solution...
No sound
Power, Cables, or RF
Faint Sound or Distortion
Gain
Lack of range, unwanted noise bursts, or drop outs
RF
Cannot turn transmitter off or change frequency settings, or can’t program receiver
Interface Locks
Excessive hum or buzzing
Ground lift
Power
Make sure that the transmitter and receiver are receiving sufficient
voltage. The receiver requires at least 90 Vac. Check the battery
indicator on the transmitter and replace battery if necessary.
Gain
Adjust the transmitter gain and sensitivity settings (see page 13)
or the receiver output level (page 9), or toggle the mic/line
switch on the back of the receiver.
Cables
Check that all cables and connectors are in working order.
Ground Lift
Lifting the ground on pin 1 of the XLR output on the receiver can
sometimes remove hum or buzz in the audio signal. Set the GND/
LIFT switch on the receiver to LIFT if you are using the XLR
connector.
Interface Locks
Both the transmitter and receiver can be locked to prevent
accidental changes. On transmitters, look for a lock symbol on the
LCD and use the key combinations illustrated on page 13 to turn
it off.
To turn off the receiver interface lock, see page 7.
Increasing Range
If the transmitter is more than 6 to 60 m (20 to 200 ft) from the
receiver antenna, you may be able to increase range by doing
one of the following:
• Reduce interference (see above)
• Increase transmitter RF power level (see page 13).
• Use an active directional antenna, antenna distribution
system, or other antenna accessory to increase RF range
(see page 19).
Radio Frequency (RF)
Using the RF LEDs
f neither blue RF LED is illuminated, then the receiver is not
detecting the presence of a transmitter.
The amber RF LEDs indicate the amount of signal being received.
This signal could be from the transmitter, or it could be from
an interfering source, such as a television broadcast. Turn the
transmitter off. If more than one or two of the amber RF LEDs are
still illuminated, then that channel has too much interference, and
you should try a different channel.
The red RF LED indicates RF overload. This will usually not
cause a problem unless you are using more than one system at
the same time, in which case, it can cause interference between
systems.
Eliminating RF Overload
If you see the red RF LED on a receiver, move the transmitter
further away from the receiver—at least 6 m (20 ft). If you are
using active antennas, reduce antenna or amplifier gain.
Compatibility
• Perform a transmitter sync, or make sure the transmitter
and receiver are set to the same group and channel.
• Look at the label on the transmitter and receiver to make
sure they are in the same band (H4, J5, L3, etc...).
Reducing Interference
• Use a different channel or perform an automatic group or
channel scan (see page 9).
• For multiple systems, check that all systems are set to
channels in the same group (systems in different bands
do not need to be set to the same group).
• Maintain a line of sight between transmitter and receiver
antennas
• Move receiver antennas away from metal objects or
other sources of RF interference (such as CD players,
computers, digital effects, network switches, network
cables and Personal Stereo Monitor (PSM) wireless
systems).
• Eliminate RF overload.
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